CA1230574A - Control device and process for aligning an endless belt utilizing the control device - Google Patents
Control device and process for aligning an endless belt utilizing the control deviceInfo
- Publication number
- CA1230574A CA1230574A CA000493766A CA493766A CA1230574A CA 1230574 A CA1230574 A CA 1230574A CA 000493766 A CA000493766 A CA 000493766A CA 493766 A CA493766 A CA 493766A CA 1230574 A CA1230574 A CA 1230574A
- Authority
- CA
- Canada
- Prior art keywords
- control device
- endless belt
- axle
- wing
- belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G21/00—Supporting or protective framework or housings for endless load-carriers or traction elements of belt or chain conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G39/00—Rollers, e.g. drive rollers, or arrangements thereof incorporated in roller-ways or other types of mechanical conveyors
- B65G39/10—Arrangements of rollers
- B65G39/12—Arrangements of rollers mounted on framework
- B65G39/16—Arrangements of rollers mounted on framework for aligning belts or chains
Abstract
ABSTRACT OF THE DISCLOSURE
Disclosed is a control device and process for aligning, in the running direction, an endless belt.
The device comprises a lifting cylinder with a ram which is retracted or extended as a result of switching signals received from microswitches via a control cir-cuit. The device further includes a pivotal wing which is pivoted by the extending ram in the running direc-tion A of the belt, and a deflecting roller having an axle, the ends of which are mounted in the eyeparts of eyebolts. During pivoting, the wing presses one eyebolt, resting by means of its bolt end against the front side of the wing, in the running direction A of the belt. The axle, mounted by means of its axle end, with a certain play in the eyepart of the other posi-tionally fixed eyebolt, is pivoted as a result. As coon as the belt runs out of alignment, that is to say deviates from the running direction A, one of the belt edges actuates the associated microswitch and con-sequently the lifting cylinder. As a result of the pivoting of the axle of the deflecting roller, the non-aligned running of the belt is constantly counteracted and the belt is deflected counter to the nonaligned direction until it actuates the other microswitch.
Disclosed is a control device and process for aligning, in the running direction, an endless belt.
The device comprises a lifting cylinder with a ram which is retracted or extended as a result of switching signals received from microswitches via a control cir-cuit. The device further includes a pivotal wing which is pivoted by the extending ram in the running direc-tion A of the belt, and a deflecting roller having an axle, the ends of which are mounted in the eyeparts of eyebolts. During pivoting, the wing presses one eyebolt, resting by means of its bolt end against the front side of the wing, in the running direction A of the belt. The axle, mounted by means of its axle end, with a certain play in the eyepart of the other posi-tionally fixed eyebolt, is pivoted as a result. As coon as the belt runs out of alignment, that is to say deviates from the running direction A, one of the belt edges actuates the associated microswitch and con-sequently the lifting cylinder. As a result of the pivoting of the axle of the deflecting roller, the non-aligned running of the belt is constantly counteracted and the belt is deflected counter to the nonaligned direction until it actuates the other microswitch.
Description
123~S74 CONTROL DEVICE AND PROCESS FOR ALIGNING AN ENDLESS BELT
UTILIZING THE CONTROL DEVICE
BACKGROUND OF THE INVENTION
.
The present invention relates to a control device and a process utilizing the control device for aligning, in the running direction, an endless belt revolving around a driven roller and a deflecting roller.
In the course of rotation of endless belts guided over two or more rollers, difficulties regarding the straight running of belts are known to arise after a relatively long operating period. Reasons for the belts running out of alignment primarily include deviations in the concentricities of the rollers, a deficient parallel alignment of the roller axles, varying heating at different points on the individual belt, varying belt abrasion, an uneven load distribu-tion on the belt and the like.
The problem is remedied to a certain extent by so-called cambered rollers, as compared to cylindrical rollers or cylinders. Cambered rollers are rollers or cylinders which possess a non-uniform diameter over their length and, for example, have a larger diameter in the roller or cylinder center than near the end faces of the roller or cylinder. However, as with cylindrical rollers, even when the rollers are designed in this way, it is necessary to make them as identical as possible with maximum precision, thus making it con-'~
~Z30574 siderably more expensive to produce the rollers becauseof the high precision required.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to design a control device of the type described above, which counteracts the nonaligned running of the belt, irrespective of whether the deviation is to the left or right relative to the running direction of the belt, in order to obtain as straight a belt run as possible in the running direc-tion.
Another object of the present invention is to achieve aligned revolution of the endless belt by less expensive means than previously available.
Yet another object of the present invention is to provide a process for the aligned operation of the endless belt.
In accomplishing the foregoing objects, there has been provided in accordance with one aspect of the present invention, a control device for aligning, in the running direction, an endless belt, comprising an endless belt which revolves around a driven roller and a deflecting roller, wherein the deflecting roller includes an axle extending transversely to the running direction of the endless belt, a control circuit which includes at least two microswitches, one of which is positioned near each edge of the endless belt, and a lifting cylinder comprising an extendable ram which adjusts the position of one of the axle ends of the axle responsive to a signal received from one of the microswitches when the switch contacts the belt edge of the endless belt. Preferably, the control device further comprises a first horizontal member which ex-tends parallel to the running direction of the endless ~Z3(:~574 belt, and a pivotal wing which pivots about the first horizontal member. Advantageously, the pivotal wing is U-shaped, with the legs of the wing extending on either side of the first horizontal member. Preferably, the control device further comprises a second longitudinal member which extends parallel to the running direction of the endless belt and is positioned on the side of the endless belt opposite the first horizontal member, and an angular block attached to one of the longitudin-al members and in operative contact with the liftingcylinder.
In one preferred embodiment, the control device further comprises a cross-member which extends between the upper and lower strands of the endless belt and which connects the first and second horizontal mem-bers, wherein the microswitches are positioned on the cross-member.
In another preferred embodiment, the control device further comprises a first plate having a slot and being positioned against the first horizontal mem-ber, a stay extending through the slot of the first plate, and a pin which fixedly positions the stay to the first plate.
In accordance with another aspect of the pre-sent invention, there has been provided a process forcontinuously aligning an endless belt, comprising the steps of pivoting an axle end of a deflecting roller about which an endless belt revolves by means of a piv-otal wing which is pivoted by an extendable ram of a lifting cylinder, actuating a microswitch positioned near an edge of the endless belt when the endless belt runs out of alignment, and retracting the extendable ra~ to reduce the pivotal force applied to the axle end.
The present invention is not restricted to an endless belt revolving around two rollers, but can also ~Z30S74 be used on endless belts running over more than two rollers. The invention achieves the advantage that the deviation of the belt to the le~t or right from the straight running direction is corrected, without the belt drive being stopped. This results from the deflection of the axle of one of the rollers, usually the deflecting roller, from its parallel position rela-tive to the axle of a further roller, e.g., a driven roller, or relative to the axles of several rollers.
Other objects, features and advantages of the present invention will be made apparent by the detailed description of preferred embodiments which follows, when considered in view of the attached figures of drawing.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Figure 1 presents a diagrammatic perspec-tive view of a first embodiment of the control device according to the present invention, and Figure 2 presents a plan view of a second embodiment of the control device according to the pre-sent invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The objects of the present invention are achieved as a result of the adjustability of one axle end of the axle of the deflecting roller positioned transversely relative to the running direction of the belt. The axle end is adjustable in the running direc-tion by means of a lifting cylinder. Additionally a microswitch is located near each belt edge and, upon contact with the belt edge, sends a switching signal from a control circuit to the lifting cylinder in order to extend or retract a ram. At the same time, the 123~574 other axle end of the axle of the deflecting roller is appropriately mounted with play in an eyebolt fixed in position, thus ensuring that the axle of the deflecting roller is pivoted by the lifting cylinder about this positionally fixed axle end functioning as a fulcrum.
In one embodiment of the present invention, the lifting cylinder rests on an angular block fastened to a longitudinal member which extends parallel to the running direction of the belt.
In a further development, the ram of the lifting cylinder passes through a guide attached to the longitudinal member, and the end of the ram is located opposite the rear side of a pivotal wing, the cross-section of which has the form of a horizontally lS arranged ~, the two legs of which surround the longitu-dinal member and are connected to one another by means of a vertical axle, about which the wing can pivot. In this embodiment, the longitudinal member is connected to a cross-member which extends between the upper and lower sides of the belt and on the top side of which are arranged the two microswitches, each of which is located near one of the two belt edges.
The axle ends of the axle of the deflecting roller are appropriately mounted in eyebolts which are arranged parallel to the belt edges on both sides of the belt and which are guided through the cross-member.
The bolt end of one eyebolt rests against the front side of the wing, and is offset laterally relative to the ram of the lifting cylinder. The other eyebolt has a specific play relative to the axle end of the axle of the deflecting roller, thus allowing the axle of the deflecting roller to be pivoted inside this eyebolt when the ram of the lifting cylinder is extended and pressed against the rear side of the wing, thereby pivoting the latter in the running direction of the belt.
lZ3~574 To support the ram and the bolt end of the eyebolts resting against the front side of the wing, screws are appropriately screwed into the front and rear sides of the wing, with the screw heads consti-tuting abutments for the bolt end of the eyebolt andthe end of the ram.
In a second embodiment of the present inven-tion, a plate resting against the longitudinal member is supported by a stay which extends through a slot in the plate and which is fixedly positioned to the plate by a pin. At the same time, the plate is designed to in-clude a continuous guide parallel to the longitudinal member, and through which an eyebolt passes. The eye-bolt projects from both sides of the plate and rests by means of the bolt end against the front side of the wing, with one axle end of the axle of the de-flecting roller being mounted in the eye part of the other eyebolt end. 'rhe other axle end of the axle of the deflecting roller i~ mounted with play in an eyebolt.
The eyebolt passes through a plate located on the other longitudinal member.
Appropriately, each of the two eyebolts is screwed to a bolt nut which rests against the cross-member or the plates and limits the displacement of the eyebolts counter to the running direction of the belt.
'rurning now to the figures of drawing, Figure 1 illustrates, in a diagrammatic and perspective repre-sentation, a first embodiment of the control device 1 for pivoting an axle 5 of a deflectiny roller 2. An endless belt 4 is guided over the deflecting roller 2 and over a further roller 3, which is a drive roller. The endless belt 4 is usually a conveyor belt, on which any article, such as, for example, printing plates, are conveyed. The control device 1, described in further detail below, can be used universally to prevent an endless belt guided over rollers from lZ30574 running out of alignment laterally. For example, a control device 1 of this type can be used in a heating device, such as that described in German Patent Application No. P 34 20 429.6. The heating device described in the German application includes two endless conveyor belts, each of which is guided via two rollers. The lower conveyor belt is guided over a transport roller and a drive roller which is drivenby a motor. The underside of the upper strand of the con-veyor belt, when the conveyor belt rotates, slides incontact over a heating plate of an electrical heating element fixed in position. The conveyor belt is thereby heated. The upper non-driven conveyor belt revolves over the transport rollers and is in slight pressure contact with the driven lower conveyor belt, so that it i8 taken up by the latter as a result of friction. The two conveyor belts run synchronously.
The lower strand of the upper conveyor belt slides in contact over a heating plate of the upper electrical heating element which heats the conveyor belt. A lami-nation carrier, which is grasped and further conveyed by the conveyor belts after it enters the heating device and which is to be laminated on both sides with photoresist film after it leaves the heating device, is heated on both sides by the conveyor belts.
Where endless belts are concerned, after a relatively long period of continuous operation, the problem often arises that the belt is deflected laterally away from the predetermined straight running direction. The reasons for this can be, among other things, slight differences in the parallel alignment of the axles of the rollers, slight deviations in the out-side diameter of the rollers relative to one another, varying heat distributions in the belts, etc.
The axle of the drive roller 3 is mounted on longitudinal members 15 and 16 which extend parallel to 1~:30574 the belt edges 9 and 10 of the belt 4. The longitudi-nal members 15 and 16 are connected to a cross-member 21 which extends between the upper and lower strands of the belt 4. On the top sides of the cross-member are arranged two microswitches 11 and 12. Each of these microswitches 11 and 12 is located in close proximity to one of the two belt edges 9 and 10. As soon as the belt 4 starts to laterally run out of alignment, either the belt edge 9 touches the switch lug of the micro-switch 11 or the belt edge 10 touches the switch lug ofthe microswitch 12, depending on the direction of deflection of the belt 4. As soon as contact is made between one of the belt edges and the corresponding microswitch, a lifting cylinder 8 receives a switching 5ignal via a control circuit 37, to effect extension or retraction of a ram 13 of the lifting cylinder 8.
The axle 5 of the deflecting roller 2 is mounted by means of its axle ends 6 and 7 in eyebolts 22, 23 which are arranged parallel to the belt edges 9 20 and 10 on both sides of the belt 4. The eyebolts 22 and 23 are guided through the cross-member 21 and each i5 screwed to a bolt nut 35, the latter resting against the cross-member 21. The bolt nuts limit displacement of the eyebolts counter to the running direction A of 25 the be~t 4. A bolt end 24 of one eyebolt 22 rests against a front side 20 of a wing 18, while the bolt end of the other eyebolt 23 projects freely from the rear side of the cross-member 21.
The lifting cylinder 8 is attached to an angu-lar block 14 fastened to one longitudinal member 15.
The end of the ram 13 of the lifting cylinder 8 is located opposite the rear side 17 of the wing, the cross-section of which is in the form of a horizontally arranged U. The two legs of the wing 18 surround the longitudinal member 15 and are connected to one another by means of a vertical axle 19 passing through the - ~3~574 longitudinal member 15. The wing 18 can thus pivot about the vertical axle 19. The eyebolt 22, which rests by means of its bolt end 24 against the front side 20 of the wing 18, is offset laterally relative to the ram 13 of the lifting cylinder 8.
One axle end 6 of the axle 5 of the deflecting roller 2 is adjusted in the running direction A by the lifting cylinder 8, as will be described in more detail below. The other axle end 7 of the axle 5 is mounted with a slight play in the positionally fixed eyebolt 23 to allow for adjustment of the lifting cylinder.
The control device 1 works as follows.
When the belt 4 starts to run out of alignment laterally in the transverse direction B, for example, the belt edge 9 first touches the microswitch 11 which sends a control signal to the lifting cylinder 8 via the control circuit 37. As a result, the ram 13 is extended and the wing 18 is pivoted in the running direction A. The movement of the wing is transmitted to the axle 5 of the deflecting roller 2 via the eyebolt 22. The axle end 6 of the axle 5 is pivoted orward in the direction of the double arrow C, and the other axle end 7 in the eye part of the positionally fixed eyebolt 23 acts as a fulcrum for the axle 5 because of the play between the axle end 7 and the eyepart of the eyebolt 23. The axle 5 is pivoted until the lifting force of the lifting cylinder 8 is equal to the tensioning force of the belt 4 which, as a result of the pivoting of the axle 5, aquires an additional tension limiting the pivoting movement. The pivoting of axle 5 counteracts the "out-of-alignment" r~nning of the belt, a movement counter to the transverse direc-tion B followed by the belt movement is initiated, and the belt 4 is moved beyond the track center until it actuates the other microswitch 12.
During the time when the belt is guided back, the ram 13 is constantly extended and rests against the _g _ lZ3C~574 wing 18. When the belt 4 starts to run out of align-ment in the other direction beyond the track center, the microswitch 12 is switched by the belt edge 10 and the lifting cylinder 8 receives, via the control cir-cuit 37, a control signal which causes the ram 13 toretract. Retraction of the ram results in the axle 5 of the deflecting roller 2 being pivoted in the pivoting direction C counter to the running direction A
as a result of the tensile stress of the belt 4 which then prevails. At the same time, the bolt nut 35 of the eyebolt 22 limits this pivoting movement of the axle 5 to the rear, since it stops the pivoting move-ment as soon as it abuts the cross-member 21.
Figure 2 illustrates in a plan view a second embodiment of the control device 1, in which components identical to those of the first embodiment bear the same reference symbols and are not described in any more detail.
In addition to the embodiment according to Figure 1, in the second embodiment there is also a guide 33 which is attached to one longitudinal member 15 and through which passes the ram 13 of the lifting cylinder 8 which rests on the angular block 14 fastened to the longitudinal member 15. The end of the ram 13 is located opposite the rear side 17 of the wing 18.
Screws 25 and 26 are screwed into the front and rear sides 20, 17 of the wing 18, and their heads 27 and 28 constitute adjustable abutments for the bolt end 24 of the eyebolt 22 and the end of the ram 13. The ram 13 is offset outwardly relative to the eyebolt 22, so that it can exert a correspondingly high tor~ue on the wing 18. Instead of the cross-member 21 of the first embo-diment, plates 29 and 36 are provided on and rest against the respective longitudinal members 15 and 16.
The plate 29, located on the same side as the lifting cylinder 8, is supported by a stay 30 which extends 1;Z30574 through a slot 31 in the plate 29. Stay 30 is fixedly connected to the plate 29 in position by a pin 32. A
continuous guide 34 extends through the plate 29 parallel to the longitudinal member 15, and the eyebolt 22 passes through this guide 34. The eyebolt 22 pro-jects from the plate on both sides and rests by means of its bolt end against the head 27 of the screw 25.
The axle end 6 of the axle 5 of the deflecting roller 2 is mounted in the eye part of the eyebolt 22 at the other end.
The other axle end 7 of the axle 5 of the deflecting roller 2 is mounted in the other eyebolt 23 with a certain play which allows a small rotary move-ment within the eye part of the eyebolt. The eyebolt 23 passes through the plate 36 in a similar way to that in which the eyebolt 22 passes through the plate 29. To limit the pivoting movement of the axle 5, the two eyebolts 22 and 23 o~ this embodiment are likewise ~crewed to bolt nuts 35 which rest against the plates 20 29 and 36 when the axle 5 executes correspondingly large pivoting movements counter to the running direc-tion A of the belt 4.
UTILIZING THE CONTROL DEVICE
BACKGROUND OF THE INVENTION
.
The present invention relates to a control device and a process utilizing the control device for aligning, in the running direction, an endless belt revolving around a driven roller and a deflecting roller.
In the course of rotation of endless belts guided over two or more rollers, difficulties regarding the straight running of belts are known to arise after a relatively long operating period. Reasons for the belts running out of alignment primarily include deviations in the concentricities of the rollers, a deficient parallel alignment of the roller axles, varying heating at different points on the individual belt, varying belt abrasion, an uneven load distribu-tion on the belt and the like.
The problem is remedied to a certain extent by so-called cambered rollers, as compared to cylindrical rollers or cylinders. Cambered rollers are rollers or cylinders which possess a non-uniform diameter over their length and, for example, have a larger diameter in the roller or cylinder center than near the end faces of the roller or cylinder. However, as with cylindrical rollers, even when the rollers are designed in this way, it is necessary to make them as identical as possible with maximum precision, thus making it con-'~
~Z30574 siderably more expensive to produce the rollers becauseof the high precision required.
SUMMARY OF THE INVENTION
It is therefore an object of the present invention to design a control device of the type described above, which counteracts the nonaligned running of the belt, irrespective of whether the deviation is to the left or right relative to the running direction of the belt, in order to obtain as straight a belt run as possible in the running direc-tion.
Another object of the present invention is to achieve aligned revolution of the endless belt by less expensive means than previously available.
Yet another object of the present invention is to provide a process for the aligned operation of the endless belt.
In accomplishing the foregoing objects, there has been provided in accordance with one aspect of the present invention, a control device for aligning, in the running direction, an endless belt, comprising an endless belt which revolves around a driven roller and a deflecting roller, wherein the deflecting roller includes an axle extending transversely to the running direction of the endless belt, a control circuit which includes at least two microswitches, one of which is positioned near each edge of the endless belt, and a lifting cylinder comprising an extendable ram which adjusts the position of one of the axle ends of the axle responsive to a signal received from one of the microswitches when the switch contacts the belt edge of the endless belt. Preferably, the control device further comprises a first horizontal member which ex-tends parallel to the running direction of the endless ~Z3(:~574 belt, and a pivotal wing which pivots about the first horizontal member. Advantageously, the pivotal wing is U-shaped, with the legs of the wing extending on either side of the first horizontal member. Preferably, the control device further comprises a second longitudinal member which extends parallel to the running direction of the endless belt and is positioned on the side of the endless belt opposite the first horizontal member, and an angular block attached to one of the longitudin-al members and in operative contact with the liftingcylinder.
In one preferred embodiment, the control device further comprises a cross-member which extends between the upper and lower strands of the endless belt and which connects the first and second horizontal mem-bers, wherein the microswitches are positioned on the cross-member.
In another preferred embodiment, the control device further comprises a first plate having a slot and being positioned against the first horizontal mem-ber, a stay extending through the slot of the first plate, and a pin which fixedly positions the stay to the first plate.
In accordance with another aspect of the pre-sent invention, there has been provided a process forcontinuously aligning an endless belt, comprising the steps of pivoting an axle end of a deflecting roller about which an endless belt revolves by means of a piv-otal wing which is pivoted by an extendable ram of a lifting cylinder, actuating a microswitch positioned near an edge of the endless belt when the endless belt runs out of alignment, and retracting the extendable ra~ to reduce the pivotal force applied to the axle end.
The present invention is not restricted to an endless belt revolving around two rollers, but can also ~Z30S74 be used on endless belts running over more than two rollers. The invention achieves the advantage that the deviation of the belt to the le~t or right from the straight running direction is corrected, without the belt drive being stopped. This results from the deflection of the axle of one of the rollers, usually the deflecting roller, from its parallel position rela-tive to the axle of a further roller, e.g., a driven roller, or relative to the axles of several rollers.
Other objects, features and advantages of the present invention will be made apparent by the detailed description of preferred embodiments which follows, when considered in view of the attached figures of drawing.
BRIEF DESCRIPTION OF THE DRAWING
In the drawing:
Figure 1 presents a diagrammatic perspec-tive view of a first embodiment of the control device according to the present invention, and Figure 2 presents a plan view of a second embodiment of the control device according to the pre-sent invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The objects of the present invention are achieved as a result of the adjustability of one axle end of the axle of the deflecting roller positioned transversely relative to the running direction of the belt. The axle end is adjustable in the running direc-tion by means of a lifting cylinder. Additionally a microswitch is located near each belt edge and, upon contact with the belt edge, sends a switching signal from a control circuit to the lifting cylinder in order to extend or retract a ram. At the same time, the 123~574 other axle end of the axle of the deflecting roller is appropriately mounted with play in an eyebolt fixed in position, thus ensuring that the axle of the deflecting roller is pivoted by the lifting cylinder about this positionally fixed axle end functioning as a fulcrum.
In one embodiment of the present invention, the lifting cylinder rests on an angular block fastened to a longitudinal member which extends parallel to the running direction of the belt.
In a further development, the ram of the lifting cylinder passes through a guide attached to the longitudinal member, and the end of the ram is located opposite the rear side of a pivotal wing, the cross-section of which has the form of a horizontally lS arranged ~, the two legs of which surround the longitu-dinal member and are connected to one another by means of a vertical axle, about which the wing can pivot. In this embodiment, the longitudinal member is connected to a cross-member which extends between the upper and lower sides of the belt and on the top side of which are arranged the two microswitches, each of which is located near one of the two belt edges.
The axle ends of the axle of the deflecting roller are appropriately mounted in eyebolts which are arranged parallel to the belt edges on both sides of the belt and which are guided through the cross-member.
The bolt end of one eyebolt rests against the front side of the wing, and is offset laterally relative to the ram of the lifting cylinder. The other eyebolt has a specific play relative to the axle end of the axle of the deflecting roller, thus allowing the axle of the deflecting roller to be pivoted inside this eyebolt when the ram of the lifting cylinder is extended and pressed against the rear side of the wing, thereby pivoting the latter in the running direction of the belt.
lZ3~574 To support the ram and the bolt end of the eyebolts resting against the front side of the wing, screws are appropriately screwed into the front and rear sides of the wing, with the screw heads consti-tuting abutments for the bolt end of the eyebolt andthe end of the ram.
In a second embodiment of the present inven-tion, a plate resting against the longitudinal member is supported by a stay which extends through a slot in the plate and which is fixedly positioned to the plate by a pin. At the same time, the plate is designed to in-clude a continuous guide parallel to the longitudinal member, and through which an eyebolt passes. The eye-bolt projects from both sides of the plate and rests by means of the bolt end against the front side of the wing, with one axle end of the axle of the de-flecting roller being mounted in the eye part of the other eyebolt end. 'rhe other axle end of the axle of the deflecting roller i~ mounted with play in an eyebolt.
The eyebolt passes through a plate located on the other longitudinal member.
Appropriately, each of the two eyebolts is screwed to a bolt nut which rests against the cross-member or the plates and limits the displacement of the eyebolts counter to the running direction of the belt.
'rurning now to the figures of drawing, Figure 1 illustrates, in a diagrammatic and perspective repre-sentation, a first embodiment of the control device 1 for pivoting an axle 5 of a deflectiny roller 2. An endless belt 4 is guided over the deflecting roller 2 and over a further roller 3, which is a drive roller. The endless belt 4 is usually a conveyor belt, on which any article, such as, for example, printing plates, are conveyed. The control device 1, described in further detail below, can be used universally to prevent an endless belt guided over rollers from lZ30574 running out of alignment laterally. For example, a control device 1 of this type can be used in a heating device, such as that described in German Patent Application No. P 34 20 429.6. The heating device described in the German application includes two endless conveyor belts, each of which is guided via two rollers. The lower conveyor belt is guided over a transport roller and a drive roller which is drivenby a motor. The underside of the upper strand of the con-veyor belt, when the conveyor belt rotates, slides incontact over a heating plate of an electrical heating element fixed in position. The conveyor belt is thereby heated. The upper non-driven conveyor belt revolves over the transport rollers and is in slight pressure contact with the driven lower conveyor belt, so that it i8 taken up by the latter as a result of friction. The two conveyor belts run synchronously.
The lower strand of the upper conveyor belt slides in contact over a heating plate of the upper electrical heating element which heats the conveyor belt. A lami-nation carrier, which is grasped and further conveyed by the conveyor belts after it enters the heating device and which is to be laminated on both sides with photoresist film after it leaves the heating device, is heated on both sides by the conveyor belts.
Where endless belts are concerned, after a relatively long period of continuous operation, the problem often arises that the belt is deflected laterally away from the predetermined straight running direction. The reasons for this can be, among other things, slight differences in the parallel alignment of the axles of the rollers, slight deviations in the out-side diameter of the rollers relative to one another, varying heat distributions in the belts, etc.
The axle of the drive roller 3 is mounted on longitudinal members 15 and 16 which extend parallel to 1~:30574 the belt edges 9 and 10 of the belt 4. The longitudi-nal members 15 and 16 are connected to a cross-member 21 which extends between the upper and lower strands of the belt 4. On the top sides of the cross-member are arranged two microswitches 11 and 12. Each of these microswitches 11 and 12 is located in close proximity to one of the two belt edges 9 and 10. As soon as the belt 4 starts to laterally run out of alignment, either the belt edge 9 touches the switch lug of the micro-switch 11 or the belt edge 10 touches the switch lug ofthe microswitch 12, depending on the direction of deflection of the belt 4. As soon as contact is made between one of the belt edges and the corresponding microswitch, a lifting cylinder 8 receives a switching 5ignal via a control circuit 37, to effect extension or retraction of a ram 13 of the lifting cylinder 8.
The axle 5 of the deflecting roller 2 is mounted by means of its axle ends 6 and 7 in eyebolts 22, 23 which are arranged parallel to the belt edges 9 20 and 10 on both sides of the belt 4. The eyebolts 22 and 23 are guided through the cross-member 21 and each i5 screwed to a bolt nut 35, the latter resting against the cross-member 21. The bolt nuts limit displacement of the eyebolts counter to the running direction A of 25 the be~t 4. A bolt end 24 of one eyebolt 22 rests against a front side 20 of a wing 18, while the bolt end of the other eyebolt 23 projects freely from the rear side of the cross-member 21.
The lifting cylinder 8 is attached to an angu-lar block 14 fastened to one longitudinal member 15.
The end of the ram 13 of the lifting cylinder 8 is located opposite the rear side 17 of the wing, the cross-section of which is in the form of a horizontally arranged U. The two legs of the wing 18 surround the longitudinal member 15 and are connected to one another by means of a vertical axle 19 passing through the - ~3~574 longitudinal member 15. The wing 18 can thus pivot about the vertical axle 19. The eyebolt 22, which rests by means of its bolt end 24 against the front side 20 of the wing 18, is offset laterally relative to the ram 13 of the lifting cylinder 8.
One axle end 6 of the axle 5 of the deflecting roller 2 is adjusted in the running direction A by the lifting cylinder 8, as will be described in more detail below. The other axle end 7 of the axle 5 is mounted with a slight play in the positionally fixed eyebolt 23 to allow for adjustment of the lifting cylinder.
The control device 1 works as follows.
When the belt 4 starts to run out of alignment laterally in the transverse direction B, for example, the belt edge 9 first touches the microswitch 11 which sends a control signal to the lifting cylinder 8 via the control circuit 37. As a result, the ram 13 is extended and the wing 18 is pivoted in the running direction A. The movement of the wing is transmitted to the axle 5 of the deflecting roller 2 via the eyebolt 22. The axle end 6 of the axle 5 is pivoted orward in the direction of the double arrow C, and the other axle end 7 in the eye part of the positionally fixed eyebolt 23 acts as a fulcrum for the axle 5 because of the play between the axle end 7 and the eyepart of the eyebolt 23. The axle 5 is pivoted until the lifting force of the lifting cylinder 8 is equal to the tensioning force of the belt 4 which, as a result of the pivoting of the axle 5, aquires an additional tension limiting the pivoting movement. The pivoting of axle 5 counteracts the "out-of-alignment" r~nning of the belt, a movement counter to the transverse direc-tion B followed by the belt movement is initiated, and the belt 4 is moved beyond the track center until it actuates the other microswitch 12.
During the time when the belt is guided back, the ram 13 is constantly extended and rests against the _g _ lZ3C~574 wing 18. When the belt 4 starts to run out of align-ment in the other direction beyond the track center, the microswitch 12 is switched by the belt edge 10 and the lifting cylinder 8 receives, via the control cir-cuit 37, a control signal which causes the ram 13 toretract. Retraction of the ram results in the axle 5 of the deflecting roller 2 being pivoted in the pivoting direction C counter to the running direction A
as a result of the tensile stress of the belt 4 which then prevails. At the same time, the bolt nut 35 of the eyebolt 22 limits this pivoting movement of the axle 5 to the rear, since it stops the pivoting move-ment as soon as it abuts the cross-member 21.
Figure 2 illustrates in a plan view a second embodiment of the control device 1, in which components identical to those of the first embodiment bear the same reference symbols and are not described in any more detail.
In addition to the embodiment according to Figure 1, in the second embodiment there is also a guide 33 which is attached to one longitudinal member 15 and through which passes the ram 13 of the lifting cylinder 8 which rests on the angular block 14 fastened to the longitudinal member 15. The end of the ram 13 is located opposite the rear side 17 of the wing 18.
Screws 25 and 26 are screwed into the front and rear sides 20, 17 of the wing 18, and their heads 27 and 28 constitute adjustable abutments for the bolt end 24 of the eyebolt 22 and the end of the ram 13. The ram 13 is offset outwardly relative to the eyebolt 22, so that it can exert a correspondingly high tor~ue on the wing 18. Instead of the cross-member 21 of the first embo-diment, plates 29 and 36 are provided on and rest against the respective longitudinal members 15 and 16.
The plate 29, located on the same side as the lifting cylinder 8, is supported by a stay 30 which extends 1;Z30574 through a slot 31 in the plate 29. Stay 30 is fixedly connected to the plate 29 in position by a pin 32. A
continuous guide 34 extends through the plate 29 parallel to the longitudinal member 15, and the eyebolt 22 passes through this guide 34. The eyebolt 22 pro-jects from the plate on both sides and rests by means of its bolt end against the head 27 of the screw 25.
The axle end 6 of the axle 5 of the deflecting roller 2 is mounted in the eye part of the eyebolt 22 at the other end.
The other axle end 7 of the axle 5 of the deflecting roller 2 is mounted in the other eyebolt 23 with a certain play which allows a small rotary move-ment within the eye part of the eyebolt. The eyebolt 23 passes through the plate 36 in a similar way to that in which the eyebolt 22 passes through the plate 29. To limit the pivoting movement of the axle 5, the two eyebolts 22 and 23 o~ this embodiment are likewise ~crewed to bolt nuts 35 which rest against the plates 20 29 and 36 when the axle 5 executes correspondingly large pivoting movements counter to the running direc-tion A of the belt 4.
Claims (22)
1. A control device for aligning, in the running direction, an endless belt, comprising:
an endless belt which revolves around a driven roller and a deflecting roller, wherein said deflecting roller includes an axle extending trans-versel.y to the running direction of said endless belt;
a control circuit which includes at least two microswitches, one of which is positioned near each edge of said endless belt; and a lifting cylinder comprising an extendable ram which adjusts the position of one of the axle ends of said axle responsive to a signal received from one of said microswitches when said microswitch contacts the belt edge of said endless belt.
an endless belt which revolves around a driven roller and a deflecting roller, wherein said deflecting roller includes an axle extending trans-versel.y to the running direction of said endless belt;
a control circuit which includes at least two microswitches, one of which is positioned near each edge of said endless belt; and a lifting cylinder comprising an extendable ram which adjusts the position of one of the axle ends of said axle responsive to a signal received from one of said microswitches when said microswitch contacts the belt edge of said endless belt.
2~ A control device as claimed in Claim 1, further comprising:
a first horizontal member which extends parallel to the running direction of said endless belt;
and a pivotal wing which pivots about said first horizontal member.
a first horizontal member which extends parallel to the running direction of said endless belt;
and a pivotal wing which pivots about said first horizontal member.
3. A control device as claimed in Claim 2, wherein said pivotal wing is U-shaped, and wherein the legs of said wing extend on either side of said first horizontal member.
4. A control device as claimed in Claim 3, further comprising an axle connecting said extending legs of said wing and about which said wing pivots.
5. A control device as claimed in Claim 2, further comprising:
a second longitudinal member which extends parallel to the running direction of said endless belt and is positioned on the side of said endless belt opposite said first horizontal member;
and an angular block attached to said first longitudinal member and in operative contact with said lifting cylinder.
a second longitudinal member which extends parallel to the running direction of said endless belt and is positioned on the side of said endless belt opposite said first horizontal member;
and an angular block attached to said first longitudinal member and in operative contact with said lifting cylinder.
6. A control device as claimed in Claim 5, further comprising a guide positioned between said angular block and said pivotal wing and attached to said first horizontal member.
7. A control device as claimed in Claim 6, wherein said ram of said lifting cylinder extends from said angular block through said guide to a point just short of said wing.
8. A control device as claimed in Claim 7, further comprising a cross-member which extends between the upper and lower strands of said endless belt and which connects said first and second horizontal mem-bers, wherein said microswitches are positioned on said cross-member.
9. A control device as claimed in Claim 8 further comprising at least two eyebolts, said eyebolts being positioned parallel to and on either side of said endless belt, said eyebolt extending through said cross-member, wherein said eyebolt positioned on the same side of said endless bolt as said pivotal wing extends to and abuts said wing.
10. A control device as claimed in Claim 9, wherein said eyebolts are positioned near and receive the ends of said axle.
11. A control device as claimed in Claim 10, wherein the eyepart of said eyebolt positioned on the side of said endless belt opposite said pivotal wing has a diameter slightly larger than said axle end received in said eyepart.
12. A control device as claimed in Claim 9, wherein said eyebolt which abuts said wing is laterally offset relative to said ram of said lifting cylinder.
13. A control device as claimed in Claim 12, further comprising at least two screws, said screws being screwed into either side of said pivotal wing, wherein the end of said ram and the end of said eyebolt abut the heads of said screws.
14. A control device as claimed in Claim 9, further comprising at least two bolt nuts positioned against said cross-member.
15. A control device as claimed in Claim 7, further comprising:
a first plate comprising a slot posi-tioned against said first horizontal member;
a stay extending through said slot of said first plate; and a pin which fixedly positions said stay to said first plate.
a first plate comprising a slot posi-tioned against said first horizontal member;
a stay extending through said slot of said first plate; and a pin which fixedly positions said stay to said first plate.
16. A control device as claimed in Claim 15, wherein said first plate further comprises a continuous guide extending through said first plate parallel to said first longitudinal member.
17. A control device as claimed in Claim 16, further comprising at least two eyebolts, said eyebolts being positioned parallel to and on either side of said endless belt, wherein said eyebolt on the same side of said endless belt as said first plate extends through said continuous guide and abuts said pivotal wing.
18. A control device as claimed in Claim 17, wherein said eyebolts comprise eyeparts which receive the ends of said axle.
19. A control device as claimed in Claim 18, wherein said eyepart of said eyebolt positioned on the side opposite said pivotal wing has a diameter slightly larger than said axle end received in said eyepart.
20. A control device as claimed in Claim 19, further comprising a second plate positioned on the side of said endless belt opposite said first plate and which receives said eyebolt positioned on the same side of said endless bolt.
21. A control device as claimed in Claim 20, further comprising a first bolt nut positioned against said first plate and a second bolt nut positioned against said second plate, said bolt nuts receive and limit displacement of said eyebolts counter to the running direction of said endless belt.
22. A process for continuously aligning an endless belt, comprising the steps of:
pivoting an axle end of a deflecting roller about which an endless belt revolves by means by means of a pivotal wing which is pivoted by an exten-dable ram of a lifting cylinder;
actuating a microswitch positioned near an edge of said endless belt when said endless belt runs out of alignment; and retracting said extendable ram to reduce the pivotal force applied to said axle end.
pivoting an axle end of a deflecting roller about which an endless belt revolves by means by means of a pivotal wing which is pivoted by an exten-dable ram of a lifting cylinder;
actuating a microswitch positioned near an edge of said endless belt when said endless belt runs out of alignment; and retracting said extendable ram to reduce the pivotal force applied to said axle end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19843439456 DE3439456A1 (en) | 1984-10-27 | 1984-10-27 | CONTROL DEVICE FOR ALIGNING A CONTINUOUS BAND ROTATING TWO ROLLS |
| DEP3439456.7 | 1984-10-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1230574A true CA1230574A (en) | 1987-12-22 |
Family
ID=6248956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000493766A Expired CA1230574A (en) | 1984-10-27 | 1985-10-24 | Control device and process for aligning an endless belt utilizing the control device |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US4693363A (en) |
| EP (1) | EP0180106B1 (en) |
| JP (1) | JPS61106309A (en) |
| KR (1) | KR860003151A (en) |
| AT (1) | ATE48264T1 (en) |
| AU (1) | AU4914985A (en) |
| BR (1) | BR8505351A (en) |
| CA (1) | CA1230574A (en) |
| DD (1) | DD237643A5 (en) |
| DE (2) | DE3439456A1 (en) |
| ES (1) | ES8705820A1 (en) |
| FI (1) | FI854170L (en) |
| HK (1) | HK43291A (en) |
| SU (1) | SU1417791A3 (en) |
| ZA (1) | ZA858200B (en) |
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| DE3711916A1 (en) * | 1987-04-09 | 1988-10-27 | Haensel Otto Gmbh | DEVICE FOR DETECTING AND CONTROLLING THE STRAIGHT RUNNING OF A DRIVED CONVEYOR BELT |
| CA2018219C (en) * | 1989-06-19 | 1998-03-24 | Richard E. Skowronski | Exercise treadmill |
| US5484362A (en) * | 1989-06-19 | 1996-01-16 | Life Fitness | Exercise treadmill |
| US6923746B1 (en) | 1989-06-19 | 2005-08-02 | Brunswick Corporation | Exercise treadmill |
| AT394018B (en) * | 1989-06-19 | 1992-01-27 | Andritz Ag Maschf | Process and apparatus for regulating or controlling the running properties of thick and non-elastic or rigid belts relative to deflecting rollers |
| US5347348A (en) * | 1989-09-27 | 1994-09-13 | Canon Kabushiki Kaisha | Image fixing apparatus with detector for detecting movement of endless belt |
| US5019864A (en) * | 1989-10-11 | 1991-05-28 | Eastman Kodak Company | Electrophotographic film core device |
| AT396673B (en) * | 1989-11-06 | 1993-11-25 | Andritz Ag Maschf | METHOD AND DEVICE FOR PRODUCING A CONVEYOR BELT |
| US5101980A (en) * | 1990-10-11 | 1992-04-07 | Arvidson Bo R | Magnetic separator assembly for use in material separator equipment |
| US5127714A (en) * | 1991-02-04 | 1992-07-07 | Caterpillar Inc. | Belt alignment mechanism for a belt driven vehicle |
| US5774153A (en) * | 1991-11-15 | 1998-06-30 | Heidelberger Druckmaschinen Aktiengesellschaft | Digital precision positioning system |
| US5312176A (en) * | 1992-09-25 | 1994-05-17 | Catepillar Inc. | Self-aligning idler wheel assembly |
| BR9503602A (en) * | 1995-08-03 | 1997-09-16 | Vale Do Rio Doce Co | Pneumatic self-aligning easel |
| DE19647763C2 (en) * | 1996-11-19 | 2000-10-26 | Santrade Ltd | Device for controlling the straight running of an endless belt |
| DE19856372B4 (en) * | 1997-12-24 | 2007-10-31 | Heidelberger Druckmaschinen Ag | Arch conveyor belt |
| US6636714B1 (en) * | 1998-12-11 | 2003-10-21 | Xerox Corporation | Roll having relieved edges for low stress belt tracking for belt loops |
| FI113038B (en) * | 2000-11-17 | 2004-02-27 | Outokumpu Oy | Hardware for continuous tape insertion |
| DE10143563A1 (en) * | 2001-09-05 | 2003-03-27 | Nexpress Solutions Llc | Device for setting a printing machine frame |
| WO2003028493A1 (en) * | 2001-09-27 | 2003-04-10 | Japan Tobacco Inc. | Bar-like article forming device |
| DE10151094C2 (en) * | 2001-10-12 | 2003-09-18 | Vattenfall Europe Generation | Arrangement for preventing misalignment of a filter cloth of a vacuum belt filter press |
| US6786325B2 (en) * | 2002-01-30 | 2004-09-07 | Hewlett-Packard Development Company, L.P. | Guiding a flexible band |
| CA2419286C (en) * | 2003-02-10 | 2006-05-16 | David A. Sharp | Belt alignment system |
| DE10316630A1 (en) * | 2003-04-11 | 2004-11-11 | Freiberger Lebensmittel Gmbh & Co. Produktions- Und Vertriebs Kg | Conveyor belt unit for the food industry has continuous belt with front drive shaft having larger diameter central part and smaller end parts |
| GB2407994A (en) * | 2003-11-17 | 2005-05-18 | Triple Edge Ltd | Endless belt tracking device |
| US20050150747A1 (en) * | 2004-01-14 | 2005-07-14 | Hewlett-Packard Development Company, L.P. | Belt tracking |
| US20070027002A1 (en) * | 2005-08-01 | 2007-02-01 | Fitness Quest Inc. | Exercise treadmill |
| US7367926B2 (en) | 2005-08-01 | 2008-05-06 | Fitness Quest Inc. | Exercise treadmill |
| WO2007016555A2 (en) * | 2005-08-01 | 2007-02-08 | Fitness Quest Inc. | Exercise treadmill |
| WO2008099429A1 (en) * | 2007-02-14 | 2008-08-21 | Cammax S.A. | Treadmill with endless belt tension adjusting device |
| DE102007017628B4 (en) * | 2007-04-12 | 2012-04-05 | Maytec Aluminium Systemtechnik Gmbh | Conveyor belt with at least one deflectable roller mounted |
| DE202007017746U1 (en) * | 2007-12-17 | 2009-02-12 | Imro Maschinenbau Gmbh | Guiding device for a conveyor belt, especially for a separation device for the separation of components from an inhomogeneous Materialgutstrom |
| US8376127B2 (en) * | 2008-07-11 | 2013-02-19 | David A. Sharp | Belt alignment system with rotatable bushing |
| US7967129B2 (en) * | 2008-09-22 | 2011-06-28 | Martin Engineering Company | Conveyor belt training idler with a locking mechanism |
| ITBS20090057A1 (en) * | 2009-03-24 | 2010-09-25 | Sys Tec S R L | DEVICE AND METHOD OF ASSEMBLY OF PRINTING SHEETS |
| AU2012216545B2 (en) | 2011-09-03 | 2013-11-07 | David A. Sharp | Belt Alignment System with Rotatable Bushing |
| CN102765579B (en) * | 2012-08-04 | 2015-07-22 | 合肥泰禾光电科技股份有限公司 | Light belt conveyer |
| CN103112688B (en) * | 2013-01-08 | 2014-12-10 | 南通四方冷链装备股份有限公司 | Freezing device |
| DE102013112827A1 (en) | 2013-11-20 | 2015-05-21 | Manroland Web Systems Gmbh | Guide for a conveyor belt in a printing machine |
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| US9033135B1 (en) | 2014-04-15 | 2015-05-19 | David Allen Sharp | Belt alignment system with dual rollers |
| JP6414530B2 (en) * | 2015-09-30 | 2018-10-31 | 株式会社ダイフク | Conveyor device and method for adjusting conveyor device |
| CN106672552B (en) * | 2017-02-16 | 2018-07-06 | 广州市永合祥自动化设备科技有限公司 | A kind of pneumatic type spacing conveying device |
| US10486912B2 (en) | 2017-07-05 | 2019-11-26 | David A. Sharp | Belt alignment system with dual guide rollers and having middle pivoting roller |
| CN110789921A (en) * | 2019-12-04 | 2020-02-14 | 西安建筑科技大学 | Deviation correcting device for transmission machinery |
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| US2724492A (en) * | 1952-10-30 | 1955-11-22 | United Electric Coal Companies | Endless belt aligner |
| US2914957A (en) * | 1956-11-13 | 1959-12-01 | Rayonier Inc | Training mechanism for belt systems |
| GB920775A (en) * | 1959-05-06 | 1963-03-13 | T & T Vicars Ltd | Improvements in or relating to the tensioning and tracking of endless conveyors |
| US3159268A (en) * | 1961-11-02 | 1964-12-01 | Rohm & Haas | Training control for conveyor belts |
| DE1247938B (en) * | 1964-05-14 | 1967-08-17 | Gerhard Grimm | Hose conveyor belt |
| DD105175A1 (en) * | 1973-07-30 | 1974-04-12 | ||
| GB1561354A (en) * | 1975-09-03 | 1980-02-20 | Rizzi & Co Spa Luigi | Device for the centering of an endless belt for a machine for the drying of hides or the like |
| US4173904A (en) * | 1975-09-03 | 1979-11-13 | S.P.A. Luigi Rizzi & C. | Apparatus for automatically centering an endless band trained over two rolls |
| DD130467A1 (en) * | 1977-04-28 | 1978-04-05 | Dieter Kuhne | DEVICE FOR CONTROLLING FOERDER DEVICES |
-
1984
- 1984-10-27 DE DE19843439456 patent/DE3439456A1/en not_active Withdrawn
-
1985
- 1985-10-18 EP EP85113219A patent/EP0180106B1/en not_active Expired
- 1985-10-18 DE DE8585113219T patent/DE3574467D1/en not_active Expired - Fee Related
- 1985-10-18 AT AT85113219T patent/ATE48264T1/en not_active IP Right Cessation
- 1985-10-22 SU SU853965748A patent/SU1417791A3/en active
- 1985-10-24 DD DD85282036A patent/DD237643A5/en unknown
- 1985-10-24 CA CA000493766A patent/CA1230574A/en not_active Expired
- 1985-10-24 FI FI854170A patent/FI854170L/en not_active IP Right Cessation
- 1985-10-25 ES ES548247A patent/ES8705820A1/en not_active Expired
- 1985-10-25 US US06/791,448 patent/US4693363A/en not_active Expired - Fee Related
- 1985-10-25 BR BR8505351A patent/BR8505351A/en unknown
- 1985-10-25 ZA ZA858200A patent/ZA858200B/en unknown
- 1985-10-26 KR KR1019850007932A patent/KR860003151A/en not_active Application Discontinuation
- 1985-10-28 JP JP60239645A patent/JPS61106309A/en active Pending
- 1985-10-28 AU AU49149/85A patent/AU4914985A/en not_active Abandoned
-
1991
- 1991-05-30 HK HK432/91A patent/HK43291A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61106309A (en) | 1986-05-24 |
| DE3439456A1 (en) | 1986-07-17 |
| EP0180106B1 (en) | 1989-11-29 |
| FI854170L (en) | 1986-04-28 |
| ATE48264T1 (en) | 1989-12-15 |
| US4693363A (en) | 1987-09-15 |
| ES8705820A1 (en) | 1987-05-16 |
| ZA858200B (en) | 1986-06-25 |
| SU1417791A3 (en) | 1988-08-15 |
| HK43291A (en) | 1991-06-07 |
| ES548247A0 (en) | 1987-05-16 |
| EP0180106A3 (en) | 1987-06-16 |
| AU4914985A (en) | 1986-05-01 |
| EP0180106A2 (en) | 1986-05-07 |
| DE3574467D1 (en) | 1990-01-04 |
| BR8505351A (en) | 1986-08-05 |
| KR860003151A (en) | 1986-05-21 |
| FI854170A0 (en) | 1985-10-24 |
| DD237643A5 (en) | 1986-07-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |