EP0281500A2 - Imprimante matricielle - Google Patents

Imprimante matricielle Download PDF

Info

Publication number
EP0281500A2
EP0281500A2 EP88730015A EP88730015A EP0281500A2 EP 0281500 A2 EP0281500 A2 EP 0281500A2 EP 88730015 A EP88730015 A EP 88730015A EP 88730015 A EP88730015 A EP 88730015A EP 0281500 A2 EP0281500 A2 EP 0281500A2
Authority
EP
European Patent Office
Prior art keywords
print head
guide
printhead
locking
carriage
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
EP88730015A
Other languages
German (de)
English (en)
Other versions
EP0281500B1 (fr
EP0281500A3 (en
Inventor
Alois Limberger
Bernhard Nolte
Dieter Stellmach
Hans Joachim Wysk
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to AT88730015T priority Critical patent/ATE78758T1/de
Publication of EP0281500A2 publication Critical patent/EP0281500A2/fr
Publication of EP0281500A3 publication Critical patent/EP0281500A3/de
Application granted granted Critical
Publication of EP0281500B1 publication Critical patent/EP0281500B1/fr
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
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L21/00—Devices for conveying sheets or webs of copy material through the apparatus or machines for manifolding, duplicating, or 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/34—Bodily-changeable print heads or carriages
    • 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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/06—Ink-ribbon guides stationary

Definitions

  • the invention relates to a printer, in particular a matrix printer, with a slide guide for a print head carriage that runs parallel to a print abutment and carries a print head, and with an ink ribbon guide arranged on the print head slide.
  • Such printers are operated by a technically untrained operator who, from time to time, has to replace worn or defective ribbons in addition to the necessary addition of recording media.
  • Special printers that are set to special requirements during their useful life, such as multiform or passbook printers. The like.
  • the print head In addition to the replacement of the ink ribbon cassette, the print head must also be replaced. Such a replacement of the print head may be necessary due to various circumstances.
  • defective printheads are to be exchanged for functional ones, and on the other hand printheads with different properties. For example, printheads equipped for normal fonts and printheads equipped for special fonts such as OCR fonts are required. Therefore, if the operator is required to change the print head for whatever reason, certain conditions must be met.
  • a carrier with a needle printhead is known (DE utility model 78 00 250), in which the printhead is detachably arranged on a special carrier and is attached via a nose on the needle guide housing against which a bracket is tensioned. Only the storage and mounting of the printhead is described here.
  • Another attachment for an exchangeable needle print head (DE utility model 74 05 484) provides in the print head carriage a recess of partly circular, partly rectangular cross-section, into which the print head is inserted.
  • the receptacle here forms a kind of bearing block.
  • no solution is described here either via the electrical part of the print head.
  • the solutions considered have no suggestions for the ribbon guide.
  • the present invention is therefore based on the object of creating a printer in which the operating personnel are enabled to be able to carry out the change of the print head without difficulty in addition to the change of the ribbon cassette.
  • the stated object is achieved according to the invention in the above-mentioned printer in that the releasable and reinsertable printhead on the printhead carriage can be exchanged via a mechanical guide and by means of an electrical plug connection, and in that at least one pivotable ribbon guide arranged on the printhead carriage as a lock for the inserted printhead on the print head carriage.
  • the mechanical guidance also creates the prerequisite for enabling the electrical connection and for the operator to be able to change the print head.
  • the ribbon guide is used for locking the print head. In this respect, the ribbon guide is given a completely new function.
  • the mechanical guide consists of two parallel dowel pins inserted vertically in the printhead carriage, to which corresponding holes in a flange of the printhead are assigned, and the electrical plug connections consist of a plug contact strip which begins when the printhead is inserted, if the printhead is already guided in sections on the dowel pins is.
  • Such an embodiment allows an electrical connection of the print head to be reached easily even by operating personnel who are not very familiar with technology, so that a replaced print head is always in a technically perfect position.
  • the ribbon guide consists of two locking bodies, each pivotable about axes perpendicular to the print head carriage. With two locking bodies it is in fact possible to bring the ink ribbon into position to the left and right of the front print head part in front of the print element front edge and to adjust it to the correct distance.
  • a further improvement of the invention provides that the two locking bodies can each be pivoted into a position lifted off with respect to the ink ribbon and unlocked with respect to the print head, further into a ribbon change position and locked position with respect to the print head and also into a ribbon guide position and position fixed with respect to the print head .
  • the position mentioned in the first position allows the print head to be changed.
  • the second position allows the ribbon to be changed and the third position is the operating position of the print head and the ribbon.
  • pivotable locking bodies are made of one-piece plastic parts, which form guide surfaces for the ink ribbon, which are offset from one another, and that an upwardly extending handle is provided in each case.
  • the individual locking body can be operated without further and obviously for this function.
  • Another improvement of the invention is that a stop and a spring-loaded locking bolt are provided on the flange of the printhead for each locking body.
  • a wine slide guide consisting of a first guide axis 1 and a second guide axis 2, which run in parallel, is arranged in front of a pressure abutment (not shown) (FIG. 5).
  • the print head carriage 3 is moved back and forth on the slide guide with a print head 4 in order to use the print head to write 4 characters on a recording medium resting on the platen.
  • the print needles are arranged in one or more columns in the front print head part 4a.
  • the print head 4 can also consist of a thermal print head or the like. Such a printhead 4 can be detached from the printhead carriage 4 and reinserted for the reasons explained above, the printhead 4 being replaced by the operating personnel of the printer itself.
  • Fig. 1 A the print head 4 is only held in a mechanical guide 6, the electrical connections for each printing element (for example, each printing pin) are combined in an electrical connector 7 (Fig. 5), which is a plate-shaped, the electrical leads form mutually insulating plug contact strip 7a.
  • An ink ribbon guide 8 is designed to be pivotable so that it can be pivoted over a flange 4b of the print head 4 and then forms a lock 9 for the print head 4.
  • the latch 9 is released in Fig. 1 A, so that the print head 4 from its mechanical guide 6 and can be pulled out of the electrical connector 7 and can be easily removed by another printhead of different types or for repairing a printhead.
  • the mechanical guide 6 consists of two parallel dowel pins 10 and 11, which are inserted vertically into the print head carriage 3 and to which holes 12 in the flange 4 b of the print head 4 are assigned.
  • the dowel pins 10 and 11 are held longer by such an extent that when the printhead 4 is inserted, the dowel pins 10 and 11 first pass through the holes 12 in the printhead 4, and thus the plug contact strip 7a slides exactly into the corresponding socket 13 in the printhead carriage 3 .
  • the ribbon guide 8 for the ribbon 5 is formed by two symmetrically and mirror-image arranged locking bodies 14 and 15.
  • the locking bodies 14 and 15 are pivotally mounted about axes 16 which stand vertically on the print head carriage 3. There are thus three positions of the locking bodies 14 and 15 for the operating personnel: 1A, the locking bodies 14 and 15 are located outside the flange 4b of the print head 4, so that a change position for the print head 4 is thus created.
  • the ink ribbon 5 is raised far above the ink ribbon guide 8 from the front printhead part 4a.
  • the ribbon guide 8 is again pivoted in somewhat, so that the print head 4 is locked, but the pivoting path is selected such that the ribbon 5 is completely stretched. In this position, the ribbon 5 can be easily replaced.
  • the ribbon guide 8 secures the print head 4 against displacement over the flange 4b. The ink ribbon 5 is not deflected in this position of the ink ribbon guide 8, so that the ink ribbon 5 can be inserted easily.
  • the ribbon guide 8 is provided by the locking bodies 14 and 15, which are each pivoted up to a stop 17 or 18, the ribbon 5 being guided tightly around the locking bodies 14 and 15 and around the front printhead part 4a (Operating position). So that the pressure pad 4 is fixed.
  • the described properties, operating positions and effects of the ribbon guide 8 are determined by a suitable design or shape of the locking bodies 14 and 15. These are made from one-piece plastic parts and therefore do not strain the print head carriage. In each case rounded guide surfaces 19 and 20 are formed, which are offset opposite one another, so that a wide channel 21 is formed. A handle 22 is formed on the print head 4 in order to make it easier for the operating personnel to pivot the locking bodies 14 and 15. The channel 21 is also inclined upwards in order to simplify the threading of the ink ribbon 5.
  • the three positions of the locking bodies 14 and 15 are secured by at least one locking bolt 23.
  • This locking bolt 23 (FIG. 5) is mounted by means of a bushing 24 which is fixed in the locking bodies 14 and 15 and is resiliently held by means of the spring 25. The spring travel is limited by an axial locking ring 26. In the two positions (Fig. 1 A, 2 A) the locking bolt 23 are opposite locking troughs 27.
  • a locking trough 27a is provided for the locking position according to FIG. 1A
  • a locking trough 27b is provided for the locking position according to FIG. 2A
  • a locking platform 27c is provided for the locking position according to FIG. 3A (FIG. 6).
  • This locking platform 27C causes a strong prestressing of the spring 25, so that in this position the print head 4 is firmly connected to the print head carriage 3 and bears against the stops 17 and 18, respectively. You can therefore print in this position.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
  • Common Mechanisms (AREA)
  • Impact Printers (AREA)
  • Macromonomer-Based Addition Polymer (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Electrophotography Using Other Than Carlson'S Method (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
EP88730015A 1987-02-28 1988-01-20 Imprimante matricielle Expired - Lifetime EP0281500B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88730015T ATE78758T1 (de) 1987-02-28 1988-01-20 Drucker, insbesondere matrix-drucker.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3706560 1987-02-28
DE19873706560 DE3706560A1 (de) 1987-02-28 1987-02-28 Drucker, insbesondere matrixdrucker

Publications (3)

Publication Number Publication Date
EP0281500A2 true EP0281500A2 (fr) 1988-09-07
EP0281500A3 EP0281500A3 (en) 1990-03-07
EP0281500B1 EP0281500B1 (fr) 1992-07-29

Family

ID=6322034

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88730015A Expired - Lifetime EP0281500B1 (fr) 1987-02-28 1988-01-20 Imprimante matricielle

Country Status (9)

Country Link
US (1) US4867589A (fr)
EP (1) EP0281500B1 (fr)
JP (1) JPH01174478A (fr)
KR (1) KR880009797A (fr)
AT (1) ATE78758T1 (fr)
CA (1) CA1287257C (fr)
DE (2) DE3706560A1 (fr)
ES (1) ES2034354T3 (fr)
YU (1) YU35188A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640199A1 (fr) * 1988-12-09 1990-06-15 Seikosha Kk Structure pour le montage d'une tete d'impression

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01168477A (ja) * 1987-12-25 1989-07-03 Juki Corp 印字装置の印字リボン案内装置
DE4139891C2 (de) * 1991-12-04 1996-05-09 Esselte Meto Int Gmbh Halterungsanordnung für einen Thermodruckkopf
EP0927104B1 (fr) * 1997-06-27 2002-12-11 Frama Ag Cassette avec dispositif d'insertion
JP3836831B2 (ja) * 2003-10-28 2006-10-25 インターナショナル・ビジネス・マシーンズ・コーポレーション プリントギャップ形成補助部材、リボンガイド、リボンカートリッジ、リボンカセット、プリンタ、及びプリント方法
DE102011082014A1 (de) 2011-09-01 2013-03-07 Schaeffler Technologies AG & Co. KG Ritzelwellenlageranordnung

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1473868A (en) * 1973-10-23 1977-05-18 Olivetti & Co Spa Electrothermal printers
IT1050504B (it) * 1974-05-10 1981-03-10 Olivetti C E C S P A Dispositivo per il pusizionamento ed il bloccaggio di una testina elettrotermica
DE7405484U (de) * 1974-02-16 1974-05-22 Kienzle Apparate Gmbh Austauschbare Befestigung für den Nadeldruckkopf in einem Mosaikdrucker
DE7800250U1 (de) * 1978-01-05 1979-04-26 Triumph Werke Nuernberg Ag, 8500 Nuernberg Traeger mit nadeldruckkopf
JPS58104782A (ja) * 1981-12-16 1983-06-22 Tokyo Electric Co Ltd プリンタ
US4444519A (en) * 1982-03-09 1984-04-24 Theodore Jay Goldlander Printers
DE3214633C2 (de) * 1982-04-20 1986-10-30 Nixdorf Computer Ag, 4790 Paderborn Einrichtung zur Führung eines auswechselbaren Farbbandes in einem Drucker
WO1984000926A1 (fr) * 1982-09-08 1984-03-15 Ncr Co Mecanisme d'accouplement pour accoupler deux pieces de façon amovible
US4473312A (en) * 1982-12-06 1984-09-25 Ncr Corporation Fastening mechanism for removably fastening together two workpieces
JPS59194882A (ja) * 1983-04-19 1984-11-05 Fujitsu Ltd リボンセツト機構
JPS59224380A (ja) * 1983-06-03 1984-12-17 Tokyo Electric Co Ltd プリンタの印字ヘツド保持装置
JPS6040283A (ja) * 1984-07-04 1985-03-02 Matsushita Electric Ind Co Ltd プリンタ
JPH0632968B2 (ja) * 1985-03-26 1994-05-02 セイコーエプソン株式会社 印字ヘツド取り付け機構

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2640199A1 (fr) * 1988-12-09 1990-06-15 Seikosha Kk Structure pour le montage d'une tete d'impression

Also Published As

Publication number Publication date
US4867589A (en) 1989-09-19
DE3706560A1 (de) 1988-09-08
ES2034354T3 (es) 1993-04-01
YU35188A (en) 1990-06-30
CA1287257C (fr) 1991-08-06
JPH01174478A (ja) 1989-07-11
KR880009797A (ko) 1988-10-05
ATE78758T1 (de) 1992-08-15
DE3706560C2 (fr) 1988-12-15
EP0281500B1 (fr) 1992-07-29
EP0281500A3 (en) 1990-03-07
DE3873120D1 (de) 1992-09-03

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