EP0094469B1 - Imprimante thermique à matrice de points - Google Patents
Imprimante thermique à matrice de points Download PDFInfo
- Publication number
- EP0094469B1 EP0094469B1 EP82810190A EP82810190A EP0094469B1 EP 0094469 B1 EP0094469 B1 EP 0094469B1 EP 82810190 A EP82810190 A EP 82810190A EP 82810190 A EP82810190 A EP 82810190A EP 0094469 B1 EP0094469 B1 EP 0094469B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- printing head
- frame
- journal
- presser roll
- shaft
- 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.)
- Expired
Links
Images
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 spring-loaded print head pivotally mounted about a vertical axis, a shaft rotatably mounted in the frame for controlling the pivoting movement of the print head, so that it from an operating position in which it with a Frame rotatably mounted pressure roller is in contact, is brought into an inoperative position in which the strip to be printed can be inserted between the print head and pressure roller.
- Such printers are known from IBM Technical Disclosure Bulletin, Volume 21, No. 4, 1978.
- 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. H. Ensuring a good contact pressure, easy introduction of the strip to be printed and easy replacement of the printhead, realized with technically complicated means, the costs of which are disproportionately high compared to the total production costs, since matrix thermal printers are intended for simpler and therefore inexpensive applications.
- 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 about a pin arranged parallel to the axis of the pressure roller and fastened to the frame, with only one of these guide wings being operatively connected to the said pin in the operating position, so that the spring-loaded printhead is only in contact with a generator of the pressure roller and a point of the pin.
- the print head 1 consists of a body 2 which has a number of heatable elements 3.
- This E: emente 3 are arranged in a straight line and, when the print head 1 in printing position, printing on the strip (not shown) located between them and a generatrix of the matrix thermal printer rotatably mounted in the frame 4 pressing roller.
- a plate 6 is fastened to the body 2 by means of screws 7 and has three bent wings 8, 9 and 10.
- the wing 8 has a triangular hole 11, the wing 9 has an elongated hole 12 and the wing 10 has an open, downward slit 13.
- On the frame 4, 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. 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 two wings 8 and 9 slide without difficulty along the pin 14 and are brought out of engagement with it can.
- 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)
Claims (5)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT82810190T ATE23487T1 (de) | 1982-05-06 | 1982-05-06 | Matrix-thermodrucker. |
DE8282810190T DE3274217D1 (en) | 1982-05-06 | 1982-05-06 | Matrix dot thermal printer |
EP82810190A EP0094469B1 (fr) | 1982-05-06 | 1982-05-06 | Imprimante thermique à matrice de points |
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 EP0094469A1 (fr) | 1983-11-23 |
EP0094469B1 true 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) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DD251253A3 (de) * | 1985-10-04 | 1987-11-11 | Robotron Bueromasch | Vorrichtung zum an- und abschwenken eines thermodruckkopfes von der druckwalze |
GB8711404D0 (en) * | 1987-05-14 | 1987-06-17 | Portals Eng Ltd | Thermal label printers |
US4750880A (en) * | 1987-11-09 | 1988-06-14 | Eastman Kodak Company | Compliant print head loading mechanism for thermal printers |
DE4042486C2 (de) * | 1990-08-31 | 1994-10-06 | Data Techno Gmbh | Druckvorrichtung mit Thermodruckkopf |
US5411339A (en) * | 1993-12-09 | 1995-05-02 | Kroy, Inc. | Portable printer and cartridge therefor |
US5541635A (en) * | 1994-03-18 | 1996-07-30 | Mettler-Toledo, Inc. | Printer mechanism |
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 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4170422A (en) * | 1975-02-03 | 1979-10-09 | Texas Instruments Incorporated | Printhead alignment mechanism |
US4195937A (en) * | 1977-09-19 | 1980-04-01 | Termcom, Inc. | Electroresistive printing apparatus |
-
1982
- 1982-05-06 EP EP82810190A patent/EP0094469B1/fr not_active Expired
- 1982-05-06 DE DE8282810190T patent/DE3274217D1/de not_active Expired
- 1982-05-06 AT AT82810190T patent/ATE23487T1/de active
Also Published As
Publication number | Publication date |
---|---|
EP0094469A1 (fr) | 1983-11-23 |
DE3274217D1 (en) | 1987-01-02 |
ATE23487T1 (de) | 1986-11-15 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: WIRTH GALLO PATENT AG |
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17P | Request for examination filed |
Effective date: 19840323 |
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