EP1044817A2 - Ink jet printer and method for operating the same - Google Patents

Ink jet printer and method for operating the same Download PDF

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Publication number
EP1044817A2
EP1044817A2 EP00108345A EP00108345A EP1044817A2 EP 1044817 A2 EP1044817 A2 EP 1044817A2 EP 00108345 A EP00108345 A EP 00108345A EP 00108345 A EP00108345 A EP 00108345A EP 1044817 A2 EP1044817 A2 EP 1044817A2
Authority
EP
European Patent Office
Prior art keywords
ink
paper
temperature
heated
ink jet
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.)
Withdrawn
Application number
EP00108345A
Other languages
German (de)
French (fr)
Other versions
EP1044817A3 (en
Inventor
Sadami c/o Mutoh Industries Ltd. Koyama
Mikita c/o Mutoh Industries Ltd. Haruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mutoh Industries Ltd
Original Assignee
Mutoh Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mutoh Industries Ltd filed Critical Mutoh Industries Ltd
Publication of EP1044817A2 publication Critical patent/EP1044817A2/en
Publication of EP1044817A3 publication Critical patent/EP1044817A3/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0024—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using conduction means, e.g. by using a heated platen
    • B41J11/00244—Means for heating the copy materials before or during printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04528—Control methods or devices therefor, e.g. driver circuits, control circuits aiming at warming up the head
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0024—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using conduction means, e.g. by using a heated platen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/015—Ink jet characterised by the jet generation process
    • B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
    • B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
    • B41J2/04501—Control methods or devices therefor, e.g. driver circuits, control circuits
    • B41J2/04563—Control methods or devices therefor, e.g. driver circuits, control circuits detecting head temperature; Ink temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
    • B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns

Landscapes

  • Ink Jet (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Handling Of Sheets (AREA)

Abstract

An ink jet printer and a method for operating the same are proposed. In order to improve the printing quality, the paper and the ink are heated to substantially the same temperature.

Description

The present invention relates generally to computer hard copy printers, and more particularly to ink jet printers in which ink droplets from a recording head of the ink jet type are discharged to a paper on a platen to perform a drafting or printing on the paper. In particular, the present invention relates to an ink jet printer according to the preamble of claim 1 and to a method according to the preamble of claim 4.
JP 4-263949 A or JP 2576470 B discloses an inkjet printer in which a platen heater is mounted on a platen, and the paper on the platen is heated by heating the platen. The droplets discharged from the recording head are caused to adhere to the paper.
Depending on slight differences of the quality of material of the drafting medium (paper, film and the like) the printing quality may vary. Particularly, in case where the drafting is performed by an ink of the solvent type, the ink goes into the drafting medium and slightly dissolves the drafting medium, and the ink tends to run depending on the quality of the drafting medium. This phenomenon seems to form a problem. Although this problem is greatly influenced by the case where ink of the solvent type is used, such an influence is recognized also when ink of an other kind is used.
The diameter or shape of the dots of the ink is not uniform according to the manner of blot of the ink, and the finish precision of a completed print (drawings, pictures and the like) is poor, and a fine finish is hard to obtain which are problems.
Object of the present invention is to solve or minimize the foregoing points and problems and to provide an ink jet printer and a method for operating an ink jet printer, with improved printing quality.
The above object is achieved by an ink jet printer according to claim 1 or a method according to claim 4. Preferred embodiments are subject of the subclaims.
It has been discovered that the shape of the dots of ink fails to become a uniform circular shape, or its diameter fails to be uniform due to the foregoing problem and due to the finding that when the ink is injected from a nozzle of the recording head and the ink reaches the drafting medium, a sharp temperature change occurs in the ink and a disarray such as diffusion, blot and the like tends to occur once there is a difference in the temperature of the ink and the temperature of the drafting medium. As a result, the finish accuracy deteriorates.
The present invention proposes to heat both the drafting medium and the ink (recording head) to equalize both the medium and the ink to an almost same temperature. In particular, this is used in ink jet printers in which a paper support provided on a machine body is heated, and ink droplets from a recording head of an inkjet type are discharged onto the heated paper and the drafting or printing is performed on the paper in a condition where the paper on the paper support is heated and a drafting quality of such ink jet printers is thus improved.
The paper sandwiched between a feed roller and a pressure roller is fed onto a platen by the rotation of the feed roller, and it is heated at a desired temperature which is preferably set between 35°C and 50°C by a heater provided on the platen. The ink droplets heated at a temperature same with the heated paper or almost same with the temperature are discharged and the printing is carried out on the paper.
Further aspects, features and advantages of the present invention will be explained with reference to the enclosed drawing of a preferred embodiment. It shows:
Fig. 1
an explanatory side view of an ink jet printer; and
Fig. 2
a block explanatory view showing a function of the ink jet printer.
A preferred embodiment of the present invention will be described in detail in the following by referring to attached drawing.
In Fig. 1, reference numeral 2 denotes a machine body of the ink jet printer. The machine body 2 is supported on a leg body 4. On the machine body 2, a pedestal 6 extending in a direction perpendicular to the surface of the paper is fixed, and a platen 8 provided with a heater 7 is supported on the pedestal 6 by means of bases 10. Paper guides 12, 14 are disposed back and forth of the platen 8.
Reference numeral 16 denotes a pair of struts (the other is omitted) fixed to the vicinity of both ends of the pedestal 6, and a Y rail 18 is mounted on an upper portion the struts 16. On the pedestral 6, a support base 20 is fixed, and a feed roller 22 is journalled on the support base 20. The feed roller 22 is connected to an X axis drive device to be controlled by a controller (illustration is omitted). A plurality of roller holders 24 are journalled at 26 on the Y rail 18. At the tip of each of the roller holders 24, a pressure roller 28 is rotatably journalled in opposition to the feed roller 22.
The rear ends of the roller holders 24 are biased in a clock direction in FIG. 1 with the axis 26 being a fulcrum by means of a tensile force of tensile springs 30. A cam shaft 32 fixed with a cam 32a is rotatably journalled on an upper surface side of the roller holders 24, and a lever 34 is fixed to one end of the cam shaft 32. When the lever 34 is swivelled by manual operation and the like, the cam shaft 32 turns, and the roller holders 24 swivell in anti-clock direction in FIG. 1 with the axis 26 as the center by the pressure of the cam 32a, and the pressure rollers 28 are separated from the feed roller 22 by a predetermined distance.
When the lever 34 returns to an original position, each pressure roller 28 contacts the feed roller 22 resiliently by the tensile resilient force of each spring 30. A Y cursor or carriage 36 is shiftably mounted on the Y rail 18 through a roller. An inkjet type recording head 38 is mounted on the Y cursor or carriage 36, and the platen 8 is in opposition to the recording head 38.
A heater 39 is built in the recording head 38. Temperature sensors 46, 48 are mounted on the platen 8 and the recording head 38, and temperature signals of the platen 8 and the recording head 38 are supplied to the controller of the ink jet printer from the sensors 46, 48. The heaters 7, 39 are connected to the controller by means of drive units 50, 52 (Fig. 2).
The platen 8 and the paper guides 12, 14 constitute a paper support, and the heater 7 may be disposed at a printing unit of the paper support and at a proper location in the upper stream side relative to the printing unit. Paper 40 drawn out from a roll 40a of paper supported on the leg body 4 is arranged to be taken upon a take-up roller 44 supported on the leg body 4 through a guide roller 42, paper guide 12, and between feed roller 22 and pressure rollers 28 and platen 8 and paper guide 14.
In order to set the paper 40 on the platen 8, the pressure roller 28 is lifted from the feed roller 22, and the paper 40 is inserted between the rollers 22 and 28, and thereafter, the pressure roller 28 is lowered and the paper 40 is sandwiched by the pressure roller 28 and the feed roller 22.
When a power source and/or the ink jet printer is turned on, the heaters 7, 39 are energized, whereby the platen 8 and the recording head 38 are heated. The temperature of the platen 8 and the recording head 38 is controlled on the basis of a temperature control program (software) 56 stored in a ROM 54 of the controller so that the paper 40 on the platen 8 and the ink discharged from a nozzle of the recording head 38 are heated at temperatures between 35°C and 50°C which are mutually equal or almost equal temperatures.
It has been confirmed as a result of experiments that if this temperature is below 35°C, the drafting quality is not improved, and any effect is extremely small. In order to elevate the temperature of the drafting medium, it is the most simple adoptable method to raise the temperature of the platen 8 on which the drafting medium is mounted, but when this method is employed, the drafting medium whose temperature is lower than that of the heated platen 8 shifts onto the platen 8 which requires the elevation of the temperature of the platen 8 to a higher level of the desired temperature of the drafting medium.
However, since the platen 8 is located at a position where hands of an operator generally tend to touch, it is dangerous to raise the temperature without due consideration, and generally about 55°C is a limit. Assuming that the upper limit of the temperature of the platen 8 is 55°C, the temperature of the drafting medium that shifts over the platen 8 becomes about 50°C when the foregoing temperature drop is taken into consideration, and this temperature becomes an upper limit. In case that the kind of the used ink and the kind of the used drafting medium are constant, the set temperatures for the recording head 38 and the platen 8 are constant, and temperature set data are recorded previously in the temperature control program 56.
In case that the kind of the used ink and the kind of the used drafting medium vary, the set temperatures of the recording head 38 and the platen 8 are variable, and the set temperatures may be input with key from an operation panel 58. Furthermore, in this case, the set temperatures from a host computer 60 is input in a RAM 62 of the controller. When the ink jet printer shifts to a plotting or printing operation, the feed roller 22 makes an intermittent rotation in clock direction in FIG. 1 by a X drive unit 63, and the paper 40 shifts in right direction over the platen 8.
On the other hand, the Y cursor or carriage 36 is reciprocally driven in a direction perpendicular to the surface of the paper in FIG. 1 along the Y rail 18 by a Y drive unit 64. More-over, vector data to be transmitted from the host computer 60 is delivered to the RAM 62 through an interface (I/F) having FIFO buffering function.
A CPU 66 of the ink jet printer applies pre-processing (data analysis) such as division process, sort process with a band width and block width which are preset against the vector data stored in the RAM 62 on the basis of a program stored in the ROM 54, and arranges the vector data contained in each block of each band to a mode of an intermediate code (for example, vector data). An image processor 68 applies a DDA (digital different analysis) process sequentially to the image data of the intermediate code mode stored in the RAM 62, and developes the raster data to bit map memory 70.
The raster data developed in the bit map memory 70 are converted to CMYK data (black K, cyan C, magenta M, yellow Y or data for printing according to Euro scale) from RGB color data (red, green blue). Next, the CPU 66 sequentially sends the raster data converted to the CMYK data to a head drive unit 70. The ink is supplied to the recording head 38 by means of an ink supply drive unit 72, and the recording head 38 discharges ink droplets by the control of the head drive unit 70 to perform a drafting or printing on the paper 40.
The present invention is constructed as described in the foregoing whereby the drafting quality can be improved.

Claims (6)

  1. Ink jet printer comprising a machine body (2), a recording head (38) of the ink jet type, and a paper support, wherein paper (40) on the paper support can be heated and, thereafter, ink droplets can be discharged from the recording head (38) to the heated paper (40) for drafting or printing,
    characterized in
    that the recording head (38) and/or the ink can be heated, so that the temperature of the ink discharged from the recording head (38) can be set at least substantially at the temperature of the heated paper (40).
  2. Ink jet printer according to claim 1, characterized in that the temperature of the heated paper is set at an optional value between 35°C and 50°C.
  3. Ink jet printer according to claim 1 or 2, characterized in that a heater (39) is located in or integrated into the recording head (38).
  4. Method for operating an ink jet printer, wherein ink is discharged on heated paper (40),
    characterized in
    that the ink is heated before discharge, preferably to a temperature substantially equal to the temperature of the heated paper (40).
  5. Method according to claim 4, characterized in that the heating temperatures are about 35°C to 50°C.
  6. Method according to claim 4 or 5, characterized in that the ink is heated only just before discharge and/or only in a recording head (38).
EP00108345A 1999-04-16 2000-04-14 Ink jet printer and method for operating the same Withdrawn EP1044817A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10978999 1999-04-16
JP11109789A JP2000296607A (en) 1999-04-16 1999-04-16 Ink jet printer

Publications (2)

Publication Number Publication Date
EP1044817A2 true EP1044817A2 (en) 2000-10-18
EP1044817A3 EP1044817A3 (en) 2001-01-17

Family

ID=14519271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108345A Withdrawn EP1044817A3 (en) 1999-04-16 2000-04-14 Ink jet printer and method for operating the same

Country Status (4)

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EP (1) EP1044817A3 (en)
JP (1) JP2000296607A (en)
KR (1) KR20000071547A (en)
CN (1) CN1270890A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056703A1 (en) * 2000-11-15 2002-06-13 Technoplot Cad Vertriebs Gmbh Ink jet printer and ink jet printing method for printing with lactate inks
US6679640B2 (en) 2001-01-08 2004-01-20 Vutek, Incorporated Printing system web guide coupling assembly
WO2004094150A1 (en) * 2003-04-18 2004-11-04 Mimaki Engineering Co., Ltd. Ink jet printer
US6857803B2 (en) * 2001-01-08 2005-02-22 Vutek, Inc. Printing system web guide with a removable platen
EP1533129A1 (en) * 2003-11-21 2005-05-25 Xerox Corporation Substrate heating assembly
CN101734019B (en) * 2003-04-18 2012-09-19 御牧高科技股份有限公司 Ink-jet printer
US10071568B2 (en) 2014-05-14 2018-09-11 Mimaki Engineering Co., Ltd. Inkjet printer

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JP3839316B2 (en) * 2001-12-25 2006-11-01 武藤工業株式会社 Inkjet recording device
JP2006192779A (en) * 2005-01-14 2006-07-27 Noritsu Koki Co Ltd Recording medium handling apparatus
JP2008044708A (en) * 2006-08-14 2008-02-28 Oki Electric Ind Co Ltd Paper sheet separation and delivery mechanism
WO2008128377A1 (en) * 2007-04-18 2008-10-30 Chunhui Luo An ink-jet printing method and its apparatus
US7828423B2 (en) * 2007-07-05 2010-11-09 Xerox Corporation Ink-jet printer using phase-change ink printing on a continuous web
JP5067878B2 (en) * 2008-05-23 2012-11-07 株式会社セイコーアイ・インフォテック Inkjet printer
JP4889059B2 (en) * 2009-11-09 2012-02-29 株式会社ミマキエンジニアリング Inkjet printer
JP5448973B2 (en) * 2010-03-30 2014-03-19 富士フイルム株式会社 Image forming apparatus
JP2013154612A (en) * 2012-01-31 2013-08-15 Seiko Epson Corp Liquid injection apparatus
US8743163B2 (en) * 2012-03-16 2014-06-03 Kodak Alaris Inc. Printing method for reducing printer artifacts
JP6059742B2 (en) * 2015-01-27 2017-01-11 武藤工業株式会社 Ink drying device for inkjet printer
JP6596834B2 (en) * 2015-02-10 2019-10-30 セイコーエプソン株式会社 Recording device
US9815296B2 (en) * 2015-11-18 2017-11-14 Heidelberger Druckmaschinen Ag Method for controlling the temperature of a sheet in a printing machine
DE102018205254A1 (en) * 2017-05-11 2018-11-15 Heidelberger Druckmaschinen Ag Digital printing machine with a tempering device for sheets
JP6988164B2 (en) * 2017-05-19 2022-01-05 セイコーエプソン株式会社 Printing equipment
JP6973011B2 (en) * 2017-12-14 2021-11-24 コニカミノルタ株式会社 Inkjet recording device
JP7074297B2 (en) * 2019-11-15 2022-05-24 株式会社ミヤコシ Printing equipment
CN111746146A (en) * 2020-07-24 2020-10-09 广州九岳天装饰工程有限公司 Handheld ink jet numbering machine

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JPH04263949A (en) 1990-10-19 1992-09-18 Hewlett Packard Co <Hp> Ink jet printer

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JPH06206311A (en) * 1993-01-12 1994-07-26 Seiko Instr Inc Bubble jet printing head
JP3162892B2 (en) * 1993-11-15 2001-05-08 キヤノン株式会社 Liquid jet recording apparatus and head temperature control method in the apparatus
US5797329A (en) * 1995-05-16 1998-08-25 Dataproducts Corporation Hot melt ink printer and method printing

Patent Citations (1)

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Publication number Priority date Publication date Assignee Title
JPH04263949A (en) 1990-10-19 1992-09-18 Hewlett Packard Co <Hp> Ink jet printer

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10056703A1 (en) * 2000-11-15 2002-06-13 Technoplot Cad Vertriebs Gmbh Ink jet printer and ink jet printing method for printing with lactate inks
DE10056703C2 (en) * 2000-11-15 2002-11-21 Technoplot Cad Vertriebs Gmbh Inkjet printer with a piezo print head for ejecting lactate ink onto an uncoated print medium
US6530657B2 (en) 2000-11-15 2003-03-11 Technoplot Cad Vertriebs Gmbh Ink jet printer with a piezo printing head for ejecting lactate ink onto an uncoated printing medium
US6679640B2 (en) 2001-01-08 2004-01-20 Vutek, Incorporated Printing system web guide coupling assembly
US6857803B2 (en) * 2001-01-08 2005-02-22 Vutek, Inc. Printing system web guide with a removable platen
WO2004094150A1 (en) * 2003-04-18 2004-11-04 Mimaki Engineering Co., Ltd. Ink jet printer
US8162470B2 (en) 2003-04-18 2012-04-24 Mimaki Engineering Co., Ltd. Inkjet printer
CN101734019B (en) * 2003-04-18 2012-09-19 御牧高科技股份有限公司 Ink-jet printer
US8444262B2 (en) 2003-04-18 2013-05-21 Mimaki Engineering Co., Ltd. Inkjet printing system
EP1533129A1 (en) * 2003-11-21 2005-05-25 Xerox Corporation Substrate heating assembly
JP2005153526A (en) * 2003-11-21 2005-06-16 Xerox Corp Heating assembly for printed-article prior to multi-stage transfer and ink image forming device equipped with the same
US10071568B2 (en) 2014-05-14 2018-09-11 Mimaki Engineering Co., Ltd. Inkjet printer

Also Published As

Publication number Publication date
CN1270890A (en) 2000-10-25
EP1044817A3 (en) 2001-01-17
KR20000071547A (en) 2000-11-25
JP2000296607A (en) 2000-10-24

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