EP0193912A1 - Fixation d'une tête d'impression thermique - Google Patents

Fixation d'une tête d'impression thermique Download PDF

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Publication number
EP0193912A1
EP0193912A1 EP86102743A EP86102743A EP0193912A1 EP 0193912 A1 EP0193912 A1 EP 0193912A1 EP 86102743 A EP86102743 A EP 86102743A EP 86102743 A EP86102743 A EP 86102743A EP 0193912 A1 EP0193912 A1 EP 0193912A1
Authority
EP
European Patent Office
Prior art keywords
thermal
holding plate
thermal print
supported
axis
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
EP86102743A
Other languages
German (de)
English (en)
Other versions
EP0193912B1 (fr
Inventor
Hermann Dipl.-Ing. Moll (Fh)
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.)
GE Medical Systems Information Technologies GmbH
Original Assignee
Hellige GmbH
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 Hellige GmbH filed Critical Hellige GmbH
Publication of EP0193912A1 publication Critical patent/EP0193912A1/fr
Application granted granted Critical
Publication of EP0193912B1 publication Critical patent/EP0193912B1/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 invention relates to a holder according to the preamble of claim 1 for supporting and guiding a thermal print head in the drive of a thermal printer and / or thermal register.
  • thermal head In thermal printers or registries of the type mentioned, the thermal print head (hereinafter “thermal head”) is guided on an axis in the drive of the printer (registrar) in such a way that the thermal printing elements or heating points arranged in a row next to one another press against the paper web on the back is supported by a rubber-coated transport roller, which also acts as a counter-pressure roller - To obtain a clean typeface, the heating points must be pressed evenly against the paper with a certain pressure.
  • the thermal head must therefore be adjusted very precisely during production, but also after every cleaning or renewal. If these requirements are not met, the result is an uneven typeface or the trace of a written curve is mapped unevenly.
  • the invention is therefore based on the object of improving thermal printers (thermal registers) in such a way that a consistently uniform typeface is achieved with the least possible manufacturing and assembly effort.
  • the solution according to the invention consists in a holder for supporting and guiding a thermal print head in the drive of a thermal printer or registrar in accordance with the type mentioned at the outset in realizing the characterizing features of patent claim 1.
  • the idea of the invention is that the mounting of the thermal print head relative to the drive is not rigid, but rather flexible due to a slightly movable bearing, but in such a way that when a pressure force is applied over the entire length of the heating point row, a uniform pressure against the paper web is achieved.
  • the thermal head 6 in the form of a ceramic plate equipped with heating points (not shown) and corresponding control logic is glued to the support points labeled "x" with a heat-resistant adhesive on a holding plate 3 made of glass fiber reinforced thermoplastic material, with stops 3d serving for precise alignment, which are parallel to groove-like guides 13 with stop surfaces 3b, 3c are made in lateral webs 9 of the holding plate 3.
  • the thermal head 6 is printed on the holder 3 in a manner to be described in more detail below in the area of its heating points against a paper web 8 which is guided and supported on the back by a rubber-coated transport roller 7, which can also be referred to as a counter-pressure roller.
  • the transport roller 7 is driven by a motor, not shown.
  • the heating points 11 of the thermal head 6 are arranged in close proximity to one another.
  • the heating points 11 must be pressed uniformly against the paper web 8 with a certain force.
  • the holding plate 3 rests in the direction of attack against the paper web 8 in only one contact point of a knob-like projection 3a in the middle between the two groove-like guides 13 on the axis 4 mounted in the frame of the drive (not shown in detail). the groove base of the guides 13 does not normally touch the axis 4.
  • the holding plate 3 is therefore supported on the one hand in the vertical direction of the illustration only in the region of the stop surfaces 3b, 3c of the guides 13 and in the horizontal or adjustment direction only at the contact point of the shoulder 3a.
  • the pressing force and its uniform distribution on the thermal head 6 held by single-point support, so to speak, "floating" over the holding plate 3 is achieved by a leaf spring 2, which in the area between the point-like support of the holding plate 3 by the projection 3a and the stops 3d on the Thermal head 6 facing away from the outside of the holding plate is clamped on one side and at its free (distal) end either lies against the frame of the drive or - if the pressing force is to be adjustable - its pressing force can be adjusted by means of a screw 1 anchored in the frame.
  • the angular range marked by two beams 14, 15 starting from the point of contact on the projection 3a approximately defines the effective range of the contact force by the leaf spring 2.
  • the transport roller 7 and the axis 4 must be manufactured lying in parallel, which is achieved, for example, by using the same frame patine during manufacture. Given the usual manufacturing tolerances for such writing mechanisms, it is no longer necessary to adjust the parallelism of the thermal head 6 and the transport roller 7.
  • a connector 5 is designated, which can also serve as a transport lock and is removed when the adhesive plate with thermal head 6 is to be removed upwards.
  • Reference note 12 indicates the encapsulated integrated circuits of the control logic. 16 with a multi-core ribbon cable is called, via which the power supply and the control signals for the control logic takes place.
  • thermal heads can be arranged next to one another, with each individual thermal head automatically aligning itself with the transport roller 7. If - as shown in the drawings - the adhesive plate 3 is narrower than the thermal head 6, several thermal heads can be arranged without a gap. This enables a curve to be written across several thermal combs with one thermal register.

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  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)
EP86102743A 1985-03-05 1986-03-03 Fixation d'une tête d'impression thermique Expired EP0193912B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3507782 1985-03-05
DE19853507782 DE3507782A1 (de) 1985-03-05 1985-03-05 Halterung fuer einen thermodruckkopf

Publications (2)

Publication Number Publication Date
EP0193912A1 true EP0193912A1 (fr) 1986-09-10
EP0193912B1 EP0193912B1 (fr) 1989-02-01

Family

ID=6264271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102743A Expired EP0193912B1 (fr) 1985-03-05 1986-03-03 Fixation d'une tête d'impression thermique

Country Status (3)

Country Link
EP (1) EP0193912B1 (fr)
JP (1) JPS61273972A (fr)
DE (2) DE3507782A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003251A1 (fr) * 1985-12-02 1987-06-04 Ncr Corporation Monture de tete d'impression
EP0298643A2 (fr) * 1987-07-06 1989-01-11 Seiko Instruments Inc. Dispositif de contre-pression pour têtes d'impression
AU639380B2 (en) * 1991-06-20 1993-07-22 Scheidt & Bachmann Gmbh Thermoprinter
FR2735422A1 (fr) * 1995-06-16 1996-12-20 Alps Electric Co Ltd Imprimante thermique
DE19527610A1 (de) * 1995-07-28 1997-01-30 Esselte Meto Int Gmbh Drucker mit einer Einrichtung zur Variation der Andruckkraft
EP0794062A1 (fr) * 1995-06-13 1997-09-10 Seiko Instruments Inc. Imprimante par lignes thermique

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3909286A1 (de) * 1989-03-21 1990-09-27 Esselte Meto Int Gmbh Thermodruckkopf
JPH0673980B2 (ja) * 1989-04-24 1994-09-21 株式会社精工舎 記録ヘッドの支持装置
DE3943239A1 (de) * 1989-12-22 1991-06-27 Siemens Ag Bildaufzeichnungseinrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406613B2 (de) * 1973-02-12 1976-02-19 Canon K.K., Tokio Thermo-druckvorrichtung
US4235555A (en) * 1977-05-04 1980-11-25 Ing. C. Olivetti & C., S.P.A. Non impact dot matrix printer
DE3226194A1 (de) * 1981-07-15 1983-02-03 Sato Kk Thermokopf-halterungsvorrichtung fuer thermo-drucker

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2406613B2 (de) * 1973-02-12 1976-02-19 Canon K.K., Tokio Thermo-druckvorrichtung
US4235555A (en) * 1977-05-04 1980-11-25 Ing. C. Olivetti & C., S.P.A. Non impact dot matrix printer
DE3226194A1 (de) * 1981-07-15 1983-02-03 Sato Kk Thermokopf-halterungsvorrichtung fuer thermo-drucker

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987003251A1 (fr) * 1985-12-02 1987-06-04 Ncr Corporation Monture de tete d'impression
EP0298643A2 (fr) * 1987-07-06 1989-01-11 Seiko Instruments Inc. Dispositif de contre-pression pour têtes d'impression
EP0298643A3 (en) * 1987-07-06 1989-10-11 Seiko Instruments Inc. Print head pressure contact device
AU639380B2 (en) * 1991-06-20 1993-07-22 Scheidt & Bachmann Gmbh Thermoprinter
EP0794062A1 (fr) * 1995-06-13 1997-09-10 Seiko Instruments Inc. Imprimante par lignes thermique
EP0794062A4 (fr) * 1995-06-13 1998-01-14 Seiko Instr Inc Imprimante par lignes thermique
FR2735422A1 (fr) * 1995-06-16 1996-12-20 Alps Electric Co Ltd Imprimante thermique
DE19527610A1 (de) * 1995-07-28 1997-01-30 Esselte Meto Int Gmbh Drucker mit einer Einrichtung zur Variation der Andruckkraft

Also Published As

Publication number Publication date
DE3507782A1 (de) 1986-09-11
DE3661992D1 (en) 1989-03-09
JPS61273972A (ja) 1986-12-04
EP0193912B1 (fr) 1989-02-01

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