US20070228643A1 - Sheet feeder - Google Patents
Sheet feeder Download PDFInfo
- Publication number
- US20070228643A1 US20070228643A1 US11/588,410 US58841006A US2007228643A1 US 20070228643 A1 US20070228643 A1 US 20070228643A1 US 58841006 A US58841006 A US 58841006A US 2007228643 A1 US2007228643 A1 US 2007228643A1
- Authority
- US
- United States
- Prior art keywords
- pad
- peripheral layer
- roller
- operable
- sheet feeder
- 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.)
- Abandoned
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/54—Pressing or holding devices
Definitions
- the present invention relates to a sheet feeder which feeds sheets of sheet to an apparatus such as a printer or a scanner, and particularly to a sheet feeder which realizes a reliable consecutive sheet feeding without an occurrence of multiple feeding or jams.
- a configuration has been such that sheets 54 are inserted between a pick roller 50 and a separation pad 51 , and the sheets are transported one by one into an apparatus using a frictional force.
- a configuration is such as to include a pad pressing unit 52 which applies a pressure for bringing the separation pad 51 into contact with a surface of the pick roller 50 by means of a pressure spring 53 in order to bring the separation pad 51 into contact with the pick roller 50 in such a way that a sufficient frictional force acts between the pick roller 50 and the separation pad 51 .
- FIG. 5 there is a related sheet feeder which the pad pressing unit 52 , which applies a pressure to the separation pad 51 , is formed in an inverted U-shape, thereby enabling the separation pad 51 to press against the surface of the pick roller 50 at two points, and an area in which the separation pad 51 makes contact with the pick roller 50 is widened, thereby enabling the sheets to be reliably separated one from another (for example, refer to JP-A-8-91609).
- the pad pressing unit 52 includes a first pad pressing member 52 a and a second pad pressing member 52 b , being equipped respectively with a first rotation fulcrum 55 and a second rotation fulcrum 56 , wherein the second rotation fulcrum 56 is provided in a center of the second pad pressing member 52 b , and the second pad pressing member 52 b is made rotatable back and forth with respect to a rotation direction of the pick roller 50 , whereby a pressure distribution is made uniform at two front and back points of the second pad pressing member 52 b (for example, refer to JP-A-2006-96503).
- a sheet feeder comprising:
- a roller operable to rotate so as to feed a sheet in a feeding direction
- a rotatable presser having a pressing projection held in contact with a first surface of the pad and a pressing surface held in contact with a second surface of the pad, wherein
- the second surface is larger than the first surface in the feeding direction
- the pressing projection is arranged at a downstream side of the pressing surface in the feeding direction.
- the pad and the roller can secure a sufficient contact area for a sheet separation. Furthermore, even in consideration of deflection characteristics due to a rigidity of the pad, a pressure distribution is made uniform in the contact area between the pad and the roller, making it possible to separate the sheets one from another regardless of a type of sheet.
- the pressing surface may have a shape that resembles a mating surface of the pad.
- the pad may include a portion having a shape that resembles a peripheral surface of the roller.
- the roller may have a first peripheral layer and a second peripheral layer inside of the first peripheral layer. Both the first peripheral layer and the second peripheral layer may be comprised of a rubber. The first peripheral layer may be greater than the second peripheral layer in a durability. The first peripheral layer may have a higher friction coefficient than the second peripheral layer. The first peripheral layer may be greater than the second peripheral layer in a hardness.
- the sheet feeder may further comprise a holder, operable to hold the presser rotatably.
- a sheet feeder comprising:
- a roller operable to rotate so as to feed a sheet in a feeding direction
- a presser operable to rotate around a rotational point, and having a first projection operable to press the pad at a downstream side in the feeding direction and a second projection operable to press the pad at an upstream side in the feeding direction, wherein
- the rotational point is displaced to a downstream side in the feeding direction from a center point between the first projection and the second projection.
- the pad and the roller can secure a sufficient contact area for a sheet separation. Also, as the rotational point of the presser is off-centered toward a front end of the pad, in accordance with the principle of leverage, a concentric load is applied to the front side of the pad, and only a weak force is applied to the back side the pad. For this reason, in consideration of deflection characteristics due to a rigidity of the pad, a pressure distribution is made uniform in the contact area between the pad and the roller, making it possible to reliably separate the sheets one from another regardless of a type of sheet.
- the presser may have an inverted U-shape.
- FIG. 1 is an example 1 of the invention
- FIG. 2 is an example 2 of the invention
- FIG. 3 is an illustration of a pick roller configured in a two-layer structure
- FIG. 4 is an illustration of a related separation pad pressing unit
- FIG. 5 is an illustration of a case in which a related inverted U-shape pad pressing unit is used.
- FIG. 6 is an illustration 2 of a case in which a related inverted U-shape pad pressing unit is used.
- a pick roller 1 for picking sheets stacked on a stacker is equipped with a separation pad 2 for separating the sheets one from another and, by a force being applied in a direction in which the separation pad 2 is pressed against the pick roller 1 , a frictional force acts on the sheets passing between them, and the sheets are separated one from another.
- the second pad pressing member 3 b is formed in a shape in which a front end thereof (at a downstream side) has a projection, and a rear end thereof (at an upstream side) presses the separation pad in a surface-to-surface contact relationship in which it rubs an underside of the separation pad 2 .
- the rear end of the second pad pressing member 3 b has a shape that resembles the underside of the separation pad 2 .
- a contact area between the rear end of the second pad pressing member 3 b and the separation pad 2 is lager than a contact area between the projection of the second pad pressing member 3 b and the separation pad 2 . So that, a distal end of the separation pad 2 (at a downstream side) is bended so as to follow a shape of the pick roller 1 .
- the second pad pressing member 3 b being formed in a shape in which its second rotation fulcrum 6 is off-centered toward the front end of the separation pad 2 in such a way that the urging force is applied uniformly to the whole area in which the separation pad 2 and the pick roller 1 are in contact with each other, a relationship L 1 >L 2 is obtained, and P 1 ⁇ P 2 is established from the principle of leverage.
- the second pad pressing member 3 b has an inverted U-shape.
- a load concentrates on a front side edge of the second pad pressing member 3 b , meaning that little force is applied to a rear side edge and, in consideration of deflection characteristics due to a rigidity of the separation pad 2 , a uniform urging force is applied to the whole contact area between the separation pad 2 and the pick roller 1 .
- the pick roller 1 in a two-layer structure in which a rubber member having a high durability and a high friction coefficient is used as an outer layer 1 a , and a low hardness foamed rubber member made of interconnected cells having a low compressive residual stress is used as an inner layer 1 b.
- the pick roller uses a rubber member having a rubber hardness of 20 degrees (JIS-A) or less.
- an automatic sheet feeder which can reliably feed sheets of any type, one at a time, into an apparatus.
Abstract
A sheet feeder includes: a roller, operable to rotate so as to feed a sheet in a feeding direction; a pad, operable to press the sheet against the roller; and a rotatable presser, having a pressing projection held in contact with a first surface of the pad and a pressing surface held in contact with a second surface of the pad. The second surface is larger than the first surface in the feeding direction, and the pressing projection is arranged at a downstream side of the pressing surface in the feeding direction.
Description
- The present invention relates to a sheet feeder which feeds sheets of sheet to an apparatus such as a printer or a scanner, and particularly to a sheet feeder which realizes a reliable consecutive sheet feeding without an occurrence of multiple feeding or jams.
- In a related sheet feeder, when sheets stacked on a stacker are picked by a pick roller, as shown in
FIG. 4 , a configuration has been such thatsheets 54 are inserted between apick roller 50 and a separation pad 51, and the sheets are transported one by one into an apparatus using a frictional force. - In this case, a configuration is such as to include a
pad pressing unit 52 which applies a pressure for bringing the separation pad 51 into contact with a surface of thepick roller 50 by means of apressure spring 53 in order to bring the separation pad 51 into contact with thepick roller 50 in such a way that a sufficient frictional force acts between thepick roller 50 and the separation pad 51. - However, with such a structure in which a pressure is supplied to one point, an area in which the separation pad 51 makes contact with the
pick roller 50 is inevitably narrowed, and the separation pad 51 cannot completely separate a plurality of bundled sheets, causing a multiple feeding in some cases. - Accordingly, as shown in
FIG. 5 , there is a related sheet feeder which thepad pressing unit 52, which applies a pressure to the separation pad 51, is formed in an inverted U-shape, thereby enabling the separation pad 51 to press against the surface of thepick roller 50 at two points, and an area in which the separation pad 51 makes contact with thepick roller 50 is widened, thereby enabling the sheets to be reliably separated one from another (for example, refer to JP-A-8-91609). - However, even with such a structure, depending on a type of sheet, a pressure distribution is not uniform at two front and back points of the
pad pressing unit 52 due to the fact that thesheets 54 make contact with the separation pad 51, and it has sometimes been impossible to effectively separate the sheets one from another. - Accordingly, in order to solve such problems, as shown in
FIG. 6 , there is a related sheet feeder in which thepad pressing unit 52 includes a first pad pressing member 52 a and a second pad pressing member 52 b, being equipped respectively with a first rotation fulcrum 55 and a second rotation fulcrum 56, wherein the second rotation fulcrum 56 is provided in a center of the second pad pressing member 52 b, and the second pad pressing member 52 b is made rotatable back and forth with respect to a rotation direction of thepick roller 50, whereby a pressure distribution is made uniform at two front and back points of the second pad pressing member 52 b (for example, refer to JP-A-2006-96503). - However, practically, even with such a structure, as the separation pad 51 has a rigidity, at a portion P1 in the figure, a reaction force of the separation pad 51 to bring the separation pad 51 into contact with the
pick roller 50 is in inverse proportion to the cube of L1, while, at a portion P2, it is inversely proportional to the cube of L2. Consequently, under pressures having a relationship P1=P2, an urging force by P2, which presses the separation pad 51 against thepick roller 50, is considerably reduced, and there has been a problem in that a concentric load is conversely applied to the portion P1. - It is therefore an object of the invention to provide a sheet feeder which, being used in an apparatus such as a printer or a scanner, automatically transports sheets into the apparatus, wherein, regardless of a type of the sheets stacked on a stacker, the stacked sheets are reliably transported, one at a time, into the apparatus.
- In order to achieve the object, according to the invention, there is provided a sheet feeder comprising:
- a roller, operable to rotate so as to feed a sheet in a feeding direction;
- a pad, operable to press the sheet against the roller; and
- a rotatable presser, having a pressing projection held in contact with a first surface of the pad and a pressing surface held in contact with a second surface of the pad, wherein
- the second surface is larger than the first surface in the feeding direction, and
- the pressing projection is arranged at a downstream side of the pressing surface in the feeding direction.
- With this configuration, the pad and the roller can secure a sufficient contact area for a sheet separation. Furthermore, even in consideration of deflection characteristics due to a rigidity of the pad, a pressure distribution is made uniform in the contact area between the pad and the roller, making it possible to separate the sheets one from another regardless of a type of sheet.
- The pressing surface may have a shape that resembles a mating surface of the pad.
- The pad may include a portion having a shape that resembles a peripheral surface of the roller.
- The roller may have a first peripheral layer and a second peripheral layer inside of the first peripheral layer. Both the first peripheral layer and the second peripheral layer may be comprised of a rubber. The first peripheral layer may be greater than the second peripheral layer in a durability. The first peripheral layer may have a higher friction coefficient than the second peripheral layer. The first peripheral layer may be greater than the second peripheral layer in a hardness.
- In this case, it is possible to obtain the roller having a low hardness and an excellent abrasion resistance, enabling a more reliable sheet separation process.
- The sheet feeder may further comprise a holder, operable to hold the presser rotatably.
- In order to achieve the object, according to the invention, there is also provided a sheet feeder comprising:
- a roller, operable to rotate so as to feed a sheet in a feeding direction;
- a pad, operable to press the sheet against the roller; and
- a presser, operable to rotate around a rotational point, and having a first projection operable to press the pad at a downstream side in the feeding direction and a second projection operable to press the pad at an upstream side in the feeding direction, wherein
- the rotational point is displaced to a downstream side in the feeding direction from a center point between the first projection and the second projection.
- With this configuration, the pad and the roller can secure a sufficient contact area for a sheet separation. Also, as the rotational point of the presser is off-centered toward a front end of the pad, in accordance with the principle of leverage, a concentric load is applied to the front side of the pad, and only a weak force is applied to the back side the pad. For this reason, in consideration of deflection characteristics due to a rigidity of the pad, a pressure distribution is made uniform in the contact area between the pad and the roller, making it possible to reliably separate the sheets one from another regardless of a type of sheet.
- The presser may have an inverted U-shape.
-
FIG. 1 is an example 1 of the invention; -
FIG. 2 is an example 2 of the invention; -
FIG. 3 is an illustration of a pick roller configured in a two-layer structure; -
FIG. 4 is an illustration of a related separation pad pressing unit; -
FIG. 5 is an illustration of a case in which a related inverted U-shape pad pressing unit is used; and -
FIG. 6 is anillustration 2 of a case in which a related inverted U-shape pad pressing unit is used. - A description will be given, with reference to the drawings, of representative examples according to the invention. Hereafter, the same parts are indicated by identical numerals, and a detailed description may be omitted.
- In an automatic sheet feeder of the example 1 of the invention (as shown in
FIG. 1 ), apick roller 1 for picking sheets stacked on a stacker is equipped with aseparation pad 2 for separating the sheets one from another and, by a force being applied in a direction in which theseparation pad 2 is pressed against thepick roller 1, a frictional force acts on the sheets passing between them, and the sheets are separated one from another. - At this point, in order to make the sheets easily separated from one another, it is necessary that, as well as the
separation pad 2 and thepick roller 1 securing a sufficient contact area, an urging force is applied uniformly to the whole contact area. - Accordingly, as shown in
FIG. 1 , by configuringpad pressing unit 3 in such a way that apressure spring 4 causes a second pad pressing member 3 b to apply a force in a direction in which theseparation pad 2 is pressed against thepick roller 1, and that the second pad pressing member 3 b rotates back and forth around asecond rotation fulcrum 6 with respect to a rotation direction of thepick roller 1, forces applied to the front and back of the second pad pressing member 3 b are made uniform. Also, in consideration of deflection characteristics due to a rigidity of theseparation pad 2, the second pad pressing member 3 b is formed in a shape in which a front end thereof (at a downstream side) has a projection, and a rear end thereof (at an upstream side) presses the separation pad in a surface-to-surface contact relationship in which it rubs an underside of theseparation pad 2. The rear end of the second pad pressing member 3 b has a shape that resembles the underside of theseparation pad 2. A contact area between the rear end of the second pad pressing member 3 b and theseparation pad 2 is lager than a contact area between the projection of the second pad pressing member 3 b and theseparation pad 2. So that, a distal end of the separation pad 2 (at a downstream side) is bended so as to follow a shape of thepick roller 1. - When a very thick sheet enters, by a first pad pressing member 3 a rotating the whole
pad pressing unit 3 around afirst rotation fulcrum 5, it is possible to maintain an appropriate pressure without an unreasonable force being applied to theseparation pad 2. - In the same way as in the example 1, in the example 2 of the invention (as shown in
FIG. 2 ), by the second pad pressing member 3 b being formed in a shape in which itssecond rotation fulcrum 6 is off-centered toward the front end of theseparation pad 2 in such a way that the urging force is applied uniformly to the whole area in which theseparation pad 2 and thepick roller 1 are in contact with each other, a relationship L1>L2 is obtained, and P1<P2 is established from the principle of leverage. Here, the second pad pressing member 3 b has an inverted U-shape. As such, a load concentrates on a front side edge of the second pad pressing member 3 b, meaning that little force is applied to a rear side edge and, in consideration of deflection characteristics due to a rigidity of theseparation pad 2, a uniform urging force is applied to the whole contact area between theseparation pad 2 and thepick roller 1. - In such an automatic sheet feeder made up of a combination of the separation pad and the pick roller, in order to carry out a more reliable sheet separation, as shown in
FIG. 3 , it is also acceptable to configure thepick roller 1 in a two-layer structure in which a rubber member having a high durability and a high friction coefficient is used as an outer layer 1 a, and a low hardness foamed rubber member made of interconnected cells having a low compressive residual stress is used as an inner layer 1 b. - In this case, the pick roller uses a rubber member having a rubber hardness of 20 degrees (JIS-A) or less.
- According to an aspect of the invention, in consideration of deflection characteristics due to a rigidity of the separation pad, by securing a sufficient contact area between the separation pad and the pick roller, as well as a pressure distribution in the contact area becoming uniform, it becomes possible to provide an automatic sheet feeder which can reliably feed sheets of any type, one at a time, into an apparatus.
Claims (9)
1. A sheet feeder comprising:
a roller, operable to rotate so as to feed a sheet in a feeding direction;
a pad, operable to press the sheet against the roller; and
a rotatable presser, having a pressing projection held in contact with a first surface of the pad and a pressing surface held in contact with a second surface of the pad, wherein
the second surface is larger than the first surface in the feeding direction, and
the pressing projection is arranged at a downstream side of the pressing surface in the feeding direction.
2. The sheet feeder according to claim 1 , wherein
the pressing surface has a shape that resembles a mating surface of the pad.
3. The sheet feeder according to claim 1 , wherein
the pad includes a portion having a shape that resembles a peripheral surface of the roller.
4. The sheet feeder according to claim 1 , wherein
the roller has a first peripheral layer and a second peripheral layer inside of the first peripheral layer,
both the first peripheral layer and the second peripheral layer are comprised of a rubber,
the first peripheral layer is greater than the second peripheral layer in a durability,
the first peripheral layer has a higher friction coefficient than the second peripheral layer, and
the first peripheral layer is greater than the second peripheral layer in a hardness.
5. The sheet feeder according to claim 1 further comprising:
a holder, operable to hold the presser rotatably.
6. A sheet feeder comprising:
a roller, operable to rotate so as to feed a sheet in a feeding direction;
a pad, operable to press the sheet against the roller; and
a presser, operable to rotate around a rotational point, and having a first projection operable to press the pad at a downstream side in the feeding direction and a second projection operable to press the pad at an upstream side in the feeding direction, wherein
the rotational point is displaced to a downstream side in the feeding direction from a center point between the first projection and the second projection.
7. The sheet feeder according to claim 6 , wherein
the presser has an inverted U-shape.
8. The sheet feeder according to claim 6 , wherein
the roller has a first peripheral layer and a second peripheral layer inside of the first peripheral layer,
both the first peripheral layer and the second peripheral layer are comprised of a rubber,
the first peripheral layer is greater than the second peripheral layer in a durability,
the first peripheral layer has a higher friction coefficient than the second peripheral layer, and
the first peripheral layer is greater than the second peripheral layer in a hardness.
9. The sheet feeder according to claim 6 further comprising:
a holder, operable to hold the presser rotatably.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006101435A JP2007276886A (en) | 2006-04-03 | 2006-04-03 | Automatic paper feeder |
JPP2006-101435 | 2006-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070228643A1 true US20070228643A1 (en) | 2007-10-04 |
Family
ID=38513562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/588,410 Abandoned US20070228643A1 (en) | 2006-04-03 | 2006-10-27 | Sheet feeder |
Country Status (3)
Country | Link |
---|---|
US (1) | US20070228643A1 (en) |
JP (1) | JP2007276886A (en) |
DE (1) | DE102006050486B4 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100295239A1 (en) * | 2009-05-19 | 2010-11-25 | Akihiro Mine | Paper sheet multi-feed preventing member |
Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1996277A (en) * | 1934-02-15 | 1935-04-02 | Cross Paper Feeder Co | Sheet separating combing wheel |
US3986712A (en) * | 1975-01-02 | 1976-10-19 | Kaiichi Hasegawa | Feeding device for card counting machines |
US4674737A (en) * | 1983-09-14 | 1987-06-23 | Ricoh Company, Ltd. | Automatic sheet feeding device |
US5193798A (en) * | 1991-09-30 | 1993-03-16 | Matsushita Graphic Communications Systems, Inc. | Automatic paper feeder |
US5253854A (en) * | 1991-03-19 | 1993-10-19 | Canon Kabushiki Kaisha | Sheet feeding apparatus |
US5261652A (en) * | 1992-04-13 | 1993-11-16 | Musashi Engineering Kabushiki Kaisha | Sheet feed device for use in sheet counter |
US5277416A (en) * | 1989-02-28 | 1994-01-11 | Samsung Electronics Co., Ltd. | Device for feeding paper into a facsimile system, copy machine or other device |
US5584475A (en) * | 1994-05-19 | 1996-12-17 | Brother Kogyo Kabushiki Kaisha | Sheet feeding device |
US5673619A (en) * | 1994-10-11 | 1997-10-07 | Riso Kagaku Corporation | Rotary stencil printer with a firming fold application means |
US6010126A (en) * | 1998-04-23 | 2000-01-04 | Dbtel Incorporated | Sheet-by-sheet paper feeding structure |
US6217017B1 (en) * | 1998-04-28 | 2001-04-17 | Oki Data Corporation | Paper-feeding apparatus and method of feeding paper |
US6318716B1 (en) * | 1998-12-24 | 2001-11-20 | Canon Kabushiki Kaisha | Sheet separating apparatus |
US6485014B1 (en) * | 1999-03-17 | 2002-11-26 | Avision Inc. | Automatic paper feeding mechanism |
US20030085507A1 (en) * | 2001-11-06 | 2003-05-08 | Shu-Ya Chiang | Integrated paper presser and stopper for automatic paper feeder |
US6672580B2 (en) * | 2001-09-03 | 2004-01-06 | Matsushita Electric Industrial Co., Ltd. | Sheet feeding apparatus |
US20060082043A1 (en) * | 2004-10-14 | 2006-04-20 | Brother Kogyo Kabushiki Kaisha | Paper feed unit, paper separating unit, and image forming apparatus |
US20060157912A1 (en) * | 2003-07-01 | 2006-07-20 | Hiroyuki Nagao | Sheet material feeding device, image reading device, and image forming device |
US20060170147A1 (en) * | 2005-02-03 | 2006-08-03 | Canon Kabushiki Kaisha | Sheet Feeding Apparatus, Image Reading Apparatus, and Image Forming Apparatus |
US7128316B2 (en) * | 2002-12-27 | 2006-10-31 | Brother Kogyo Kabushiki Kaisha | Sheet feeding device |
US20070114712A1 (en) * | 2004-09-29 | 2007-05-24 | Yoshiki Tsuchiyama | Automatic paper feeder |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58176828A (en) * | 1982-04-08 | 1983-10-17 | 株式会社東芝 | Breaking device |
JPS61142738A (en) * | 1984-12-17 | 1986-06-30 | Toshiba Corp | Method for implanting ions in single crystal substrate |
JPS63258335A (en) * | 1987-04-14 | 1988-10-25 | Matsushita Graphic Commun Syst Inc | Automatic sheet feed device |
JPH0524675A (en) * | 1991-07-16 | 1993-02-02 | Bando Chem Ind Ltd | Paper feeding roller |
JP3341482B2 (en) * | 1994-09-21 | 2002-11-05 | 村田機械株式会社 | Paper separation device |
-
2006
- 2006-04-03 JP JP2006101435A patent/JP2007276886A/en active Pending
- 2006-10-26 DE DE102006050486A patent/DE102006050486B4/en not_active Expired - Fee Related
- 2006-10-27 US US11/588,410 patent/US20070228643A1/en not_active Abandoned
Patent Citations (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1996277A (en) * | 1934-02-15 | 1935-04-02 | Cross Paper Feeder Co | Sheet separating combing wheel |
US3986712A (en) * | 1975-01-02 | 1976-10-19 | Kaiichi Hasegawa | Feeding device for card counting machines |
US4674737A (en) * | 1983-09-14 | 1987-06-23 | Ricoh Company, Ltd. | Automatic sheet feeding device |
US5277416A (en) * | 1989-02-28 | 1994-01-11 | Samsung Electronics Co., Ltd. | Device for feeding paper into a facsimile system, copy machine or other device |
US5253854A (en) * | 1991-03-19 | 1993-10-19 | Canon Kabushiki Kaisha | Sheet feeding apparatus |
US5193798A (en) * | 1991-09-30 | 1993-03-16 | Matsushita Graphic Communications Systems, Inc. | Automatic paper feeder |
US5261652A (en) * | 1992-04-13 | 1993-11-16 | Musashi Engineering Kabushiki Kaisha | Sheet feed device for use in sheet counter |
US5584475A (en) * | 1994-05-19 | 1996-12-17 | Brother Kogyo Kabushiki Kaisha | Sheet feeding device |
US5673619A (en) * | 1994-10-11 | 1997-10-07 | Riso Kagaku Corporation | Rotary stencil printer with a firming fold application means |
US6010126A (en) * | 1998-04-23 | 2000-01-04 | Dbtel Incorporated | Sheet-by-sheet paper feeding structure |
US6217017B1 (en) * | 1998-04-28 | 2001-04-17 | Oki Data Corporation | Paper-feeding apparatus and method of feeding paper |
US6318716B1 (en) * | 1998-12-24 | 2001-11-20 | Canon Kabushiki Kaisha | Sheet separating apparatus |
US6485014B1 (en) * | 1999-03-17 | 2002-11-26 | Avision Inc. | Automatic paper feeding mechanism |
US6672580B2 (en) * | 2001-09-03 | 2004-01-06 | Matsushita Electric Industrial Co., Ltd. | Sheet feeding apparatus |
US20030085507A1 (en) * | 2001-11-06 | 2003-05-08 | Shu-Ya Chiang | Integrated paper presser and stopper for automatic paper feeder |
US7128316B2 (en) * | 2002-12-27 | 2006-10-31 | Brother Kogyo Kabushiki Kaisha | Sheet feeding device |
US20060157912A1 (en) * | 2003-07-01 | 2006-07-20 | Hiroyuki Nagao | Sheet material feeding device, image reading device, and image forming device |
US20070114712A1 (en) * | 2004-09-29 | 2007-05-24 | Yoshiki Tsuchiyama | Automatic paper feeder |
US20060082043A1 (en) * | 2004-10-14 | 2006-04-20 | Brother Kogyo Kabushiki Kaisha | Paper feed unit, paper separating unit, and image forming apparatus |
US20060170147A1 (en) * | 2005-02-03 | 2006-08-03 | Canon Kabushiki Kaisha | Sheet Feeding Apparatus, Image Reading Apparatus, and Image Forming Apparatus |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100295239A1 (en) * | 2009-05-19 | 2010-11-25 | Akihiro Mine | Paper sheet multi-feed preventing member |
Also Published As
Publication number | Publication date |
---|---|
DE102006050486A1 (en) | 2007-10-11 |
DE102006050486B4 (en) | 2010-03-04 |
JP2007276886A (en) | 2007-10-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100379664C (en) | Sheet supplying device | |
KR100461589B1 (en) | Paper separating guide of a feeding cassette for printing apparatus | |
US20130043643A1 (en) | Sheet feeding device and recording apparatus | |
GB2068340A (en) | Sheet feeding apparatus | |
EP1160185A3 (en) | Paper feeder | |
US20070228643A1 (en) | Sheet feeder | |
US8231123B2 (en) | Automatic paper feeder | |
US7580165B2 (en) | Paper pressing device | |
USRE41513E1 (en) | Paper-separating mechanism | |
JPS63258335A (en) | Automatic sheet feed device | |
JP4628989B2 (en) | Paper separator | |
JP2017039593A (en) | Sheet feeding device and printer | |
JPH0733273A (en) | Automatic paper feeder | |
JP2000185835A (en) | Paper feeder | |
JPH04251048A (en) | Sheet feeding device | |
JP3027252B2 (en) | Automatic paper feeder | |
JP2772284B2 (en) | Automatic paper feed mechanism | |
JPH07223750A (en) | Paper feed device | |
TWI359746B (en) | Printing medium branch out mechanism | |
JPH07187423A (en) | Paper feeding device | |
CN101108699B (en) | Particle feeding system | |
JPH0445030A (en) | Automatic paper feeder | |
JPH10236681A (en) | Sheet feeding device and image processing device | |
JP2000296932A (en) | Paper feed auxiliary sheet and its setting method | |
JPH1179447A (en) | Paper feeder |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: PFU LIMITED, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MORIKAWA, SYUUICHI;REEL/FRAME:018464/0954 Effective date: 20061018 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |