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EP0094469A1 - Imprimante thermique à matrice de points - Google Patents

Imprimante thermique à matrice de points Download PDF

Info

Publication number
EP0094469A1
EP0094469A1 EP82810190A EP82810190A EP0094469A1 EP 0094469 A1 EP0094469 A1 EP 0094469A1 EP 82810190 A EP82810190 A EP 82810190A EP 82810190 A EP82810190 A EP 82810190A EP 0094469 A1 EP0094469 A1 EP 0094469A1
Authority
EP
European Patent Office
Prior art keywords
frame
thermal printer
print head
shaft
matrix thermal
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
EP82810190A
Other languages
German (de)
English (en)
Other versions
EP0094469B1 (fr
Inventor
Johannes Wirth
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.)
K Tron Patent AG
Original Assignee
K Tron Patent AG
Wirth Gallo and Co
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 K Tron Patent AG, Wirth Gallo and Co filed Critical K Tron Patent AG
Priority to EP82810190A priority Critical patent/EP0094469B1/fr
Priority to DE8282810190T priority patent/DE3274217D1/de
Priority to AT82810190T priority patent/ATE23487T1/de
Publication of EP0094469A1 publication Critical patent/EP0094469A1/fr
Application granted granted Critical
Publication of EP0094469B1 publication Critical patent/EP0094469B1/fr
Expired 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/312—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print pressure adjustment mechanisms, e.g. pressure-on-the paper mechanisms

Definitions

  • the present invention relates to a matrix thermal printer with a frame, a print head and a pressure roller rotatably mounted in the frame.
  • Such printers are known.
  • the text is printed line by line by means of a print head arranged transversely to the direction of the paper feed.
  • the strip to be printed, paper strips or labels stuck on a carrier strip are held between the print head and a pressure roller.
  • the print is made with the strip stationary.
  • the print head and pressure roller must ensure good printing on the one hand and allow easy insertion of the paper strip on the other.
  • the printhead must be able to be replaced periodically, since it is exposed to moderate, unavoidable wear.
  • these requirements i.e. ensuring a good contact pressure, easy introduction of the strip to be printed and easy replacement of the print head, are met with technically complicated means, the costs of which are disproportionately high compared to the total production costs, since matrix thermal printers are simpler and therefore cheaper Applications are provided.
  • the object on which the invention is based was to create a matrix thermal printer which has means for guiding the print head and for controlling its position, so that all three of the above-mentioned requirements can be met simply and reliably.
  • the print head is pivotally and displaceably mounted with play by means of two horizontal guide wings around a pin arranged parallel to the axis of the pressure roller and fastened to the frame, and can be pressed against the pressure roller by means of a third, spring-loaded, vertical guide wing, wherein in the pressed-on position, only one of the horizontal guide wings is operatively connected to the Za p f mentioned that a shaft rotatably mounted in the frame is provided for controlling the pivoting movement of the print head.
  • Fig. 1 only those elements of the matrix thermal printer are shown which are necessary for understanding the invention. The electrical connections, the strip to be printed and its drive are not shown.
  • the print head 1 consists of a body 2 which has a number of heatable elements 3. These elements 3 are arranged in a straight line and, when the print head 1 is in the printing position, they print on the strip (not shown) which lies between il and a generator of a pressure roller 5 rotatably mounted in the frame 4 of the matrix thermal print.
  • body 2 On body 2 is a 6 fastened by means of screws 7, which has three bent wings 8, 9 and 10.
  • the wing 8 has a triangular hole 11, the Wing 9 an elongated hole 12 and the wing 10 an open, downward slot 13.
  • a pin 14 is fastened with a bi-conical groove 15. Furthermore, the frame 4 carries a pin 16 and a rotatably mounted shaft 17.
  • a coil spring 18 is mounted on pin 16, one end 19 of which is supported against the pin 14 and the other end 20 engages in a groove 21 of the shaft 17.
  • This groove 21 contains a cam 22.
  • the shaft 21 has at its lower end two stops 24 cooperating with a stop 23 attached to the frame 4 and a handle 25 at its upper end.
  • the described matrix thermal printer works as follows.
  • the pin 14 In the pressure position (Fig. 2-5), the pin 14 extends through the holes 11 and 12 of the wings 8 and 9 and the end 20 of the coil spring 18, which extends through the slot 19, presses the print head 1 against the pressure roller 5th
  • the cam 22 is not in engagement with this end 19 (FIG. 5).
  • the print head 1 is thus held against the pressure roller 5 and is supported by the triangular hole 11, the edge of which is in contact with the bi-conical groove 15.
  • the elongated hole 12 merely prevents the print head 1 from tipping over in the plane transverse to the pressing direction.
  • the shaft 17 is rotated by 90 ° by means of the handle 25.
  • the cam 22 then comes into contact with the end 20 of the spiral spring 18, so that the entire print head 1 is pivoted out and is no longer in contact with the pressure roller 5.
  • the connections between the holes 11, 12 and the pin 14 remain with play. In this position of the print head 1, a new strip to be printed can be inserted with ease.
  • the holes 11 and 12 are dimensioned such that the the wings 8 and 9 slide without difficulty along the pin 14 and can be disengaged from it.
  • the cam 22 is designed such that the shaft 17 is held stable in its two positions by the pressure of the spring 18.
  • the described matrix thermal printer is normally provided with a cover. It is advantageous to design the shaft 17 such that it is designed as a locking means for the cover, so that the cover can only be closed when the print head is in the pressure position.
  • the printer is installed within a balance and the balance plate is designed as a cover for the printer.
  • this shaft 17 can also interact with a microswitch that controls the heating of the elements 3, so that they are only energized when the print head is in the pressure position.

Landscapes

  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
EP82810190A 1982-05-06 1982-05-06 Imprimante thermique à matrice de points Expired EP0094469B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP82810190A EP0094469B1 (fr) 1982-05-06 1982-05-06 Imprimante thermique à matrice de points
DE8282810190T DE3274217D1 (en) 1982-05-06 1982-05-06 Matrix dot thermal printer
AT82810190T ATE23487T1 (de) 1982-05-06 1982-05-06 Matrix-thermodrucker.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP82810190A EP0094469B1 (fr) 1982-05-06 1982-05-06 Imprimante thermique à matrice de points

Publications (2)

Publication Number Publication Date
EP0094469A1 true EP0094469A1 (fr) 1983-11-23
EP0094469B1 EP0094469B1 (fr) 1986-11-12

Family

ID=8190060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810190A Expired EP0094469B1 (fr) 1982-05-06 1982-05-06 Imprimante thermique à matrice de points

Country Status (3)

Country Link
EP (1) EP0094469B1 (fr)
AT (1) ATE23487T1 (fr)
DE (1) DE3274217D1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616925A1 (de) * 1985-10-04 1987-04-09 Robotron Veb K Vorrichtung zum an- und abschwenken eines thermodruckkopfes von der durckwalze
GB2204834A (en) * 1987-05-14 1988-11-23 Portals Eng Ltd Improvements in or relating to thermal label printers
WO1989004256A1 (fr) * 1987-11-09 1989-05-18 Eastman Kodak Company Mecanisme de chargement deformable d'une tete d'impression pour des imprimantes thermiques
DE4027521A1 (de) * 1990-08-31 1992-03-05 Data Techno Gmbh Druckvorrichtung mit thermodruckkopf
US5541635A (en) * 1994-03-18 1996-07-30 Mettler-Toledo, Inc. Printer mechanism
EP0738213A4 (fr) * 1993-12-09 1997-01-08 Kroy Inc Imprimante portative et sa cartouche
EP0678393A3 (fr) * 1994-04-21 1997-02-19 Seiko Epson Corp Montage d'une tête d'impression thermique.
US6305855B1 (en) * 1999-08-18 2001-10-23 Eltron International, Inc. Integrated ribbon mechanism

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2403202A1 (fr) * 1977-09-19 1979-04-13 Termcom Inc Pellicule a couches multiples utilisee dans un appareil d'impression par resistance electrique
US4170422A (en) * 1975-02-03 1979-10-09 Texas Instruments Incorporated Printhead alignment mechanism

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4170422A (en) * 1975-02-03 1979-10-09 Texas Instruments Incorporated Printhead alignment mechanism
FR2403202A1 (fr) * 1977-09-19 1979-04-13 Termcom Inc Pellicule a couches multiples utilisee dans un appareil d'impression par resistance electrique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
IBM TECHNICAL DISCLOSURE BULLETIN, Band 21, Nr. 4, September 1978, Seiten 1594,1595, Armonk, USA *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3616925A1 (de) * 1985-10-04 1987-04-09 Robotron Veb K Vorrichtung zum an- und abschwenken eines thermodruckkopfes von der durckwalze
GB2204834A (en) * 1987-05-14 1988-11-23 Portals Eng Ltd Improvements in or relating to thermal label printers
GB2204834B (en) * 1987-05-14 1991-06-19 Portals Eng Ltd Improvements in or relating to thermal label printers
WO1989004256A1 (fr) * 1987-11-09 1989-05-18 Eastman Kodak Company Mecanisme de chargement deformable d'une tete d'impression pour des imprimantes thermiques
DE4027521A1 (de) * 1990-08-31 1992-03-05 Data Techno Gmbh Druckvorrichtung mit thermodruckkopf
EP0738213A4 (fr) * 1993-12-09 1997-01-08 Kroy Inc Imprimante portative et sa cartouche
US5541635A (en) * 1994-03-18 1996-07-30 Mettler-Toledo, Inc. Printer mechanism
EP0678393A3 (fr) * 1994-04-21 1997-02-19 Seiko Epson Corp Montage d'une tête d'impression thermique.
US5674013A (en) * 1994-04-21 1997-10-07 Seiko Epson Corporation Thermal printer
US6305855B1 (en) * 1999-08-18 2001-10-23 Eltron International, Inc. Integrated ribbon mechanism

Also Published As

Publication number Publication date
EP0094469B1 (fr) 1986-11-12
ATE23487T1 (de) 1986-11-15
DE3274217D1 (en) 1987-01-02

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