EP0495411A2 - Papierklemmvorrichtung - Google Patents

Papierklemmvorrichtung Download PDF

Info

Publication number
EP0495411A2
EP0495411A2 EP92100357A EP92100357A EP0495411A2 EP 0495411 A2 EP0495411 A2 EP 0495411A2 EP 92100357 A EP92100357 A EP 92100357A EP 92100357 A EP92100357 A EP 92100357A EP 0495411 A2 EP0495411 A2 EP 0495411A2
Authority
EP
European Patent Office
Prior art keywords
platen drum
holding bar
record paper
bracket
hinge
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.)
Granted
Application number
EP92100357A
Other languages
English (en)
French (fr)
Other versions
EP0495411B1 (de
EP0495411A3 (en
Inventor
Kwang-Ho Dongshin Apt. Ro
Moon-Bae Ingye Apt. Park
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co 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
Priority claimed from KR1019910000367A external-priority patent/KR920006786A/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP0495411A2 publication Critical patent/EP0495411A2/de
Publication of EP0495411A3 publication Critical patent/EP0495411A3/en
Application granted granted Critical
Publication of EP0495411B1 publication Critical patent/EP0495411B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
    • B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
    • B41J13/22—Clamps or grippers
    • B41J13/223—Clamps or grippers on rotatable drums

Definitions

  • the present invention relates to an apparatus for holding a paper in a video printer, and more particularly the paper holder of the video printer for increasing a printing speed with a high picture quality.
  • a video printer for printing a picture recorded by acquiring a video signal momentarily and the picture to be reproduced on a monitor through a recording device such as a still camera.
  • a method of heat conductive sublimation for sublimating each of three colors of yellow(Y), magenta(M) and cyan(C) successively, which enables a gradation of the color to be expressed freely, thus expressing all kinds of colors of the video signal.
  • the video printer comprises an ink ribbon 16 applied with a dye of three colors Y, M and C consecutively, a heat sensitive record paper 15, and a thermal printing head (T.P.H.) 10 for pressing a platen drum 1 selectively.
  • the record paper 15 and the ink ribbon 16 advance at the speed of the platen drum 1.
  • Each of dyes Y, M and C is sublimated by the heat value of the T.P.H. 10, and is absorbed on the record paper 15.
  • Various rate of the absorbed dyes Y, M and C makes various synthesized colors with different gradation so that the printing of all kinds of color is possible.
  • a holder for fixing the record paper on the platen drum wherein the holder 23 is installed around a shaft 13 of the platen drum 1 and set by a spring 6, and a clamp bracket 22 actuates a side end of the holder 23 so as to let the holder fix or release the record paper.
  • the holder 23 is pushed by the clamp bracket 22 rotating anti-clockwise and is lifted from the surface of the platen drum 1 so as to receive the record paper. By returning the clamp bracket 22, the holder 23 is released to its original position by a restoring force of the spring 6 so as to fix the record paper 15 by pressing.
  • the T.P.H. 10 is lifted at a fixed position of the circumference of the platen drum 1 so as to make an opening for passing the holder 23 when the platen drum 1 rotates.
  • the T.P.H. 10 generates a heat during the pressing of the ribbon just after passing the holder through the opening, transcribing the dyes on the ribbon to the heat sensitive record paper.
  • the three colors of Y, M and C are printed. Thereafter, an arm end of the clamp bracket 22 pushes the holder 23 by rotating anti-clockwise, releasing a forefront tip of the printed record paper and discharging the printed record paper. At this time, the T.P.H. should press the record paper, because in case of the T.P.H. being detached from the record paper, the friction force is not supplied to the record paper and though the ribbon advances, the ribbon is damaged if not the friction force.
  • the object of the present invention is to provide a device for reducing a printing time, by applying friction force to a record paper simultaneously with printing completion, thereby to discharge the record paper.
  • the object of the present invention is to provide a device for reducing a substantial length of a ribbon by discharging the printed paper right after printing completion.
  • a paper holder for fixing a record paper on a platen drum in a video printer comprising a holding bar for fixing the record paper on the platen drum, two clamp brackets formed at both end of the holding bar and installed on both side walls of the platen drum so as to rotate the holding bar around a hinge in the clamp bracket and set by a spring, a driving unit for actuating the clamp bracket, and a roller for applying a transmission friction force to the recording paper.
  • two clamp brackets 2 which are connected to both side ends of a holding bar 3 respectively, are installed on both outer side walls of a platen drum 1 so as to rotate around a hinge 4 formed in each clamp bracket 2.
  • a protrusion pin 5 is projected from the outer surface of the clamp bracket 2 with being apart from the hinge 4.
  • One terminal of a spring 6 is mounted on an inside surface of the clamp bracket 2, and the other terminal thereof is mounted on the bottom or top surface of the platen drum 1, so as to pull the holding bar 3 toward a circumference of the platen drum 1 by its resilient force.
  • Another protrusion pin 7 is formed near the spring 6 with opposing to the protrusion 5.
  • a flange 9 of a solenoid 8 is contactable with the protrusion pins 5 and 7.
  • T.P.H. 10 is positioned over a upper space of the platen drum 1 and is connected to a roller 12 through a leaf spring 11 at the forefront of the T.P.H. 10.
  • Middle portion of the clamp bracket is curved toward the holding bar to form a slide groove 14 between the curve of said middle portion and a shaft 13 of the platen drum 1.
  • the record paper is transmitted through a guide passage and which is detected by a sensor (not shown).
  • the flange 9 of the solenoid 8 pushes the projected pin 5 of the clamp bracket 2. So, the clamp bracket 2 is rotated anti-clockwise around the hinge 4 while the slide groove 14 moves around the circumference of the shaft 13. And the holding bar 3 moves toward from the surface of the platen drum 1 to be apart from the circumference of the platen drum 1 as shown in Fig.5B.
  • the clamp bracket 2 is rotated at the hinge 4 clockwise, returning to its original position by a resilient force of the spring 6, as soon as an electric source of the solenoid 8 is cut. Accordingly the forefront tip of the record paper 15 is fixed between the holding bar 3 and the platen drum 1. Accordingly the record paper 15 moves along the surface of the platen drum 1 according as the platen drum 1 rotates in order to print a given color.
  • the T.P.H. 10 is lifted so as to pass the holding bar 3.
  • the platen drum 1 rotates further until the holding bar 3 arrives at a point B.
  • the roller 12 of the T.P.H. 10 presses the ribbon 16 on the record paper 15 to provide a friction force to the record paper 15.
  • the printing operation is performed by heat generated from the T.P.H. 10.
  • the above printing operation is as same as that of the conventional video printer. That is, during the holding bar 3 continues to rotate further from the point B, the T.P.H. 10 generates heat and sublimates a dye of Y color, printing the Y color on the record paper 15 as shown in Fig.5F.
  • the holding bar 3 When the holding bar 3 arrives at the point B after printing the color Y and M in the above operation, it rotates by the angle of 15° more after two and half revolutions, which is detected by the sensor. At this time, the platen drum stops rotating. Then the flange 9 of the solenoid 8 pushes the protrusion 7 of the clamp bracket 2 anti-clockwise so as to move the holding bar 3 from the point B to the direction of an arrow, the holder being apart from surface of the platen drum 1 as shown in Fig.5G, and the record paper 15 being lifted by its resilient force.
  • the holding bar 3 presses the surface of the platen drum 1 by a restoring force of the spring 6, the record paper being over the holding bar. Thereafter the platen drum 1 continues to rotate for printing the color C.
  • the record paper in which only Y and M colors are printed is fixed on the platen drum safely by a friction force of the roller 12.
  • the discharging roller 17 transmits the print-completed paper to a discharging tray right after printing completion.
  • the paper holder increases the printing speed by preventing the platen drum from rotating unnecessarily and prevents the waste of the ribbon by discharging the printed paper right after printing completion of whole color.

Landscapes

  • Handling Of Cut Paper (AREA)
  • Electronic Switches (AREA)
EP19920100357 1991-01-12 1992-01-10 Papierklemmvorrichtung Expired - Lifetime EP0495411B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019910000367A KR920006786A (ko) 1990-09-21 1991-01-12 액정표시 장치
KR36791 1991-01-12

Publications (3)

Publication Number Publication Date
EP0495411A2 true EP0495411A2 (de) 1992-07-22
EP0495411A3 EP0495411A3 (en) 1993-03-24
EP0495411B1 EP0495411B1 (de) 1996-09-11

Family

ID=19309670

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920100357 Expired - Lifetime EP0495411B1 (de) 1991-01-12 1992-01-10 Papierklemmvorrichtung

Country Status (2)

Country Link
EP (1) EP0495411B1 (de)
DE (1) DE69213484T2 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261405A (en) * 1991-10-16 1993-05-19 Samsung Electronics Co Ltd Paper clamping and releasing arrangements on the platen drum of a selective multicolour printer
EP0572700A1 (de) * 1992-06-04 1993-12-08 Samsung Electronics Co., Ltd. Papierhalter für einen Videodrucker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272802A2 (de) * 1986-12-22 1988-06-29 Polaroid Corporation Blattklemmvorrichtung für drehbare Walzen
EP0340925A2 (de) * 1988-05-02 1989-11-08 Mitsubishi Denki Kabushiki Kaisha Einrichtung zum Stützen des Druckpapiers eines Druckers
EP0403775A2 (de) * 1989-05-08 1990-12-27 Mitsubishi Denki Kabushiki Kaisha Drucker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0272802A2 (de) * 1986-12-22 1988-06-29 Polaroid Corporation Blattklemmvorrichtung für drehbare Walzen
EP0340925A2 (de) * 1988-05-02 1989-11-08 Mitsubishi Denki Kabushiki Kaisha Einrichtung zum Stützen des Druckpapiers eines Druckers
EP0403775A2 (de) * 1989-05-08 1990-12-27 Mitsubishi Denki Kabushiki Kaisha Drucker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261405A (en) * 1991-10-16 1993-05-19 Samsung Electronics Co Ltd Paper clamping and releasing arrangements on the platen drum of a selective multicolour printer
GB2261405B (en) * 1991-10-16 1995-03-08 Samsung Electronics Co Ltd Video printer
EP0572700A1 (de) * 1992-06-04 1993-12-08 Samsung Electronics Co., Ltd. Papierhalter für einen Videodrucker

Also Published As

Publication number Publication date
DE69213484T2 (de) 1997-02-06
EP0495411B1 (de) 1996-09-11
EP0495411A3 (en) 1993-03-24
DE69213484D1 (de) 1996-10-17

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