EP1084853A1 - Thermodrucker - Google Patents

Thermodrucker Download PDF

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Publication number
EP1084853A1
EP1084853A1 EP00402534A EP00402534A EP1084853A1 EP 1084853 A1 EP1084853 A1 EP 1084853A1 EP 00402534 A EP00402534 A EP 00402534A EP 00402534 A EP00402534 A EP 00402534A EP 1084853 A1 EP1084853 A1 EP 1084853A1
Authority
EP
European Patent Office
Prior art keywords
roller
print head
head
frame
stop
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Withdrawn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
EP00402534A
Other languages
English (en)
French (fr)
Inventor
Patrick Favre
Laurent Brac De La Perriere
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.)
Safran Electronics and Defense SAS
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Publication of EP1084853A1 publication Critical patent/EP1084853A1/de
Withdrawn legal-status Critical Current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
    • B41J15/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles
    • B41J15/042—Supporting, feeding, or guiding devices; Mountings for web rolls or spindles for loading rolled-up continuous copy material into printers, e.g. for replacing a used-up paper roll; Point-of-sale printers with openable casings allowing access to the rolled-up continuous copy material
    • 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
    • B41J11/02—Platens
    • B41J11/04—Roller platens

Definitions

  • the invention relates to a thermal printer.
  • the domain of the invention is that of thermal printers, and more particularly that of thermal printers included in payment terminals for bank card for example. So it's just printers with a small writing width and a print head which is fixed.
  • the object of the invention is to ensure uniform support of the paper on which one you want to print against the print head, and this with the the simplest and least expensive device to make.
  • bank payment terminals portable have a thermal head having a width of about 58 mm, and comprising approximately 384 printing dots. This represents a definition of 6.6 points per millimeter.
  • This print head is attached to the printer frame by an elastic device which gives the head printer mobility in one direction.
  • Thermal paper is held against the print head by a drive roller.
  • the drive roller is integral with the cover of the loading magazine in paper. So when you open this cover to reload the printer for paper, the roller moves away from the print head, which gives you complete freedom the user to position the paper. Then when the cover is closed, the drive roller presses the paper against the print head. To ensure correct positioning of the roller relative to the head printing, and therefore to ensure proper maintenance of the paper, the roller comes to rest on a stop fixed on the printer frame.
  • Figure 1 shows a print head 101 fixed to a frame 102 by an elastic link 103 which gives the head 101 mobility according to a horizontal direction.
  • a sheet of paper 104 is held against the head 103 by a roller 105.
  • the roller 105 is in abutment on a stop 106 fixed to the frame 102.
  • the roller 105 is movable around a hinge 107.
  • the problem with this device is that when it is made, it accumulates many quotes and tolerances that must be maintained to ensure correct positioning of roller 105.
  • the dimensions relate to the frame, to the stop 106, on the hinge 107 and on the print head 101. Indeed if the link 103 makes it possible to recover a slight defect in a horizontal positioning of the roller, it does not allow a defect in vertical positioning. So stop 106 must be fixed very precisely with respect to the frame 102. Similarly, the play of the hinge 107 is zero. It is therefore a difficult solution to implement.
  • the invention solves these problems on the one hand by securing the stop and the print head, on the other hand by making the print head mobile according to two directions. Therefore the print head allows to catch errors positioning of the drive roller due to incorrect machining or quotations held but at the limit, in a horizontal direction and a vertical direction.
  • the invention therefore relates to a thermal printer comprising a frame, a print head, a paper feed roller, and a timing roller stopper characterized in that the stopper wedging the drive roller is rigidly fixed to the print head.
  • FIG. 2 shows a frame 201 of a printing device 200.
  • the 200 printing device can be a printer or any other device requiring information to be printed, such as a bank payment.
  • Figure 2 also shows a print head 202.
  • This print head is substantially equal in width to that of paper on which it should print, and it has heating elements which let you burn this paper. In our example the print head has a width of 58mm, and has 384 independent heating elements. These elements constitute a line and can be activated independently. This is like saying that a line of the printed image has 384 pixels.
  • the print head 202 is fixed to a radiator 203.
  • the radiator 203 is a device made of a material which makes it possible to dissipate the excess heat produced by the head 202.
  • a radiator is a flat device.
  • the radiator 203 comprises a protrusion 204.
  • This protrusion 204 serves as a stop for an axis 205 of a 206 paper feed roller, it is also useful for dissipation of excess heat and will allow the heating elements making up the head 202 to cool.
  • the head 202 is fixed to the radiator 203 so that when the axis 205 of the roll 206 rests on the protrusion 204, the line formed by the heating elements of the head 202 and the director of the axis 205 are parallel and there is tangency between the head 202 and the surface of the roller 206. So when you place a sheet of paper 207 between the head 202 and the roller 206, the sheet 207 can be driven by the roller 206. In addition as there is tangency between the roller 206 and the head 202 the sheet 207 can be printed since it is pressed against the print head 202 by the roller 206.
  • the axis 205 is fixed to a branch 208 by a pivot link 209.
  • the axis 205 and the roller 206 can therefore have a rotational movement around of the pivot link 209.
  • the branch 208 is fixed to the frame 201 by a hinge 210.
  • the connection between the axis 205 and the branch 208 can be slightly floating.
  • the branch 208 is in the open position, when the roller 206 is as far as possible from the head 202.
  • the branch 202 is in the closed position when there is tangency between the roller 206 and the head 202.
  • FIG. 4 shows that, as a general rule, branch 208 is a cover 401.
  • the roller 206 and the cover 401 are therefore integral in a movement of rotation about the axis of the hinge 210.
  • a locking device not shown. This locking device limits the travel of the hood around the hinge 210.
  • the radiator 203 is fixed to the frame 201 by a spring 211 which can be compressed in a horizontal direction, and by a spring 212 which can be compressed in a vertical direction.
  • the horizontal is defined when the device including the device according to the invention is placed flat on a table, in the normal position provided for its operation by its manufacturer. In practice it it suffices that the compression directions of the springs 211 and 212 are not not parallel, and both oppose the placement of the roller 206. Proper positioning of the roller 206 relative to the head 202 is therefore ensured by good completion of the stop 204.
  • Figure 3 illustrates that Figure 2 was a side view.
  • the figure 3 shows that there is a protrusion on which the axis 205 abuts on either side of the head 202. There is therefore a protrusion 204 and a outgrowth 204b.
  • the axis 205 is supported both on the stop 204 and on the stop 204b.
  • FIG. 3 also shows that the axis 205 is integral, for example, with a gear 301. It is thanks to this gear 301 that the roller 206 can be rotated, and therefore drag the paper to scroll in front of the head 202.
  • the axle 205, roller 206 and gear 301 assembly is movable in rotation about an axis 302 parallel to the head 202. This allows to press the roller 206 against the head 202, or to free access to a compartment in which to place the paper reserve of the printer.
  • gear 301 For driving the rotating roller 206, or the gear 301 comes to mesh on a gear fixed on the frame 201.
  • the gear fixed on the frame 201 is rotated by a motor included in the device.
  • Either gear 301 is meshed on a device which is included in the cover 401.
  • This latter solution dispenses with having to provide means so that the gear 301 meshes properly on a gear which would be fixed to the frame 201.
  • the device for rotating the roller 206 is completely integral, in its movement around axis 302, with axis 205 and the roller 206. This eliminates the problems associated with relative positioning two gears which must mesh correctly.

Landscapes

  • Common Mechanisms (AREA)
  • Electronic Switches (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP00402534A 1999-09-16 2000-09-13 Thermodrucker Withdrawn EP1084853A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9911569A FR2798619B1 (fr) 1999-09-16 1999-09-16 Imprimante thermique
FR9911569 1999-09-16

Publications (1)

Publication Number Publication Date
EP1084853A1 true EP1084853A1 (de) 2001-03-21

Family

ID=9549902

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00402534A Withdrawn EP1084853A1 (de) 1999-09-16 2000-09-13 Thermodrucker

Country Status (4)

Country Link
US (1) US6646667B1 (de)
EP (1) EP1084853A1 (de)
JP (1) JP3438816B2 (de)
FR (1) FR2798619B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2327557A1 (de) * 2009-11-30 2011-06-01 Seiko Instruments Inc. Wärmedrucker

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004058510A1 (en) * 2002-12-23 2004-07-15 Polaroid Corporation Roller assembly
US8057437B2 (en) * 2007-08-31 2011-11-15 Hospira, Inc. Radially sealing vavle for an infusion set

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02128854A (ja) * 1988-11-09 1990-05-17 Mitsubishi Electric Corp サーマルプリンタ
GB2234713A (en) * 1989-07-26 1991-02-13 Mitsubishi Electric Corp Thermal print head mounting
DE4005810A1 (de) * 1990-02-23 1991-08-29 Siemens Ag Thermotransfer-druckvorrichtung
US5366302A (en) * 1991-07-25 1994-11-22 Kanzaki Seishi Co., Ltd. Thermal printer
JPH0811385A (ja) * 1994-06-28 1996-01-16 Nec Eng Ltd ラインサーマルプリンタのヘッドリトラクション機構
EP0765761A1 (de) * 1995-09-29 1997-04-02 Anritsu Corporation Wärmedruckgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2121359B (en) * 1982-05-11 1985-09-04 Tokyo Shibaura Electric Co Thermal transfer recording apparatus
US4750880A (en) * 1987-11-09 1988-06-14 Eastman Kodak Company Compliant print head loading mechanism for thermal printers
JP2543176B2 (ja) * 1989-03-17 1996-10-16 シャープ株式会社 熱記録装置
US5173718A (en) * 1990-10-03 1992-12-22 Matsushita Graphic Rohm Co., Ltd. Scanning head
US6118469A (en) * 1995-11-21 2000-09-12 Seiko Epson Corporation Thermal printer
US5833377A (en) * 1996-05-10 1998-11-10 Monarch Marking Systems, Inc. Core, spindle and combination thereof
US5882126A (en) * 1998-02-12 1999-03-16 Premark Feg L.L.C. Laterally adjustable print head

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02128854A (ja) * 1988-11-09 1990-05-17 Mitsubishi Electric Corp サーマルプリンタ
GB2234713A (en) * 1989-07-26 1991-02-13 Mitsubishi Electric Corp Thermal print head mounting
DE4005810A1 (de) * 1990-02-23 1991-08-29 Siemens Ag Thermotransfer-druckvorrichtung
US5366302A (en) * 1991-07-25 1994-11-22 Kanzaki Seishi Co., Ltd. Thermal printer
JPH0811385A (ja) * 1994-06-28 1996-01-16 Nec Eng Ltd ラインサーマルプリンタのヘッドリトラクション機構
EP0765761A1 (de) * 1995-09-29 1997-04-02 Anritsu Corporation Wärmedruckgerät

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 014, no. 361 (M - 1006) 6 August 1990 (1990-08-06) *
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 05 31 May 1996 (1996-05-31) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2327557A1 (de) * 2009-11-30 2011-06-01 Seiko Instruments Inc. Wärmedrucker

Also Published As

Publication number Publication date
JP2001130088A (ja) 2001-05-15
FR2798619B1 (fr) 2001-11-23
US6646667B1 (en) 2003-11-11
JP3438816B2 (ja) 2003-08-18
FR2798619A1 (fr) 2001-03-23

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