EP0409073B1 - Tête d'impression pour imprimante thermique et pour imprimante thermique de transfert - Google Patents

Tête d'impression pour imprimante thermique et pour imprimante thermique de transfert Download PDF

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Publication number
EP0409073B1
EP0409073B1 EP90113302A EP90113302A EP0409073B1 EP 0409073 B1 EP0409073 B1 EP 0409073B1 EP 90113302 A EP90113302 A EP 90113302A EP 90113302 A EP90113302 A EP 90113302A EP 0409073 B1 EP0409073 B1 EP 0409073B1
Authority
EP
European Patent Office
Prior art keywords
thermal
printing
back pressure
pressure element
strip
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 - Lifetime
Application number
EP90113302A
Other languages
German (de)
English (en)
Other versions
EP0409073A1 (fr
Inventor
Eberhard Strassburg
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0409073A1 publication Critical patent/EP0409073A1/fr
Application granted granted Critical
Publication of EP0409073B1 publication Critical patent/EP0409073B1/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
    • 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

Definitions

  • the invention relates to a printhead for thermal printing and thermal transfer printing processes according to the preamble of claim 1.
  • Such a printhead is known for example from DE-GM 87 14 648.
  • the known print head has a soft rubber roller, which rests against the thermal print bar during the printing process.
  • the disadvantage was that there was a large gap between the rubber roller and the edge of the dispenser tongue, which could not be used for printing.
  • the previously known printhead was relatively bulky in construction and had a high weight.
  • the maintenance effort was considerable because the rubber roller had to be completely replaced after printing errors.
  • the invention is therefore based on the object of improving the previously known printhead in such a way that it has a lighter structure with smaller dimensions and is at the same time easy to maintain. Another object of the invention is to reduce the distance between the edge of the dispensing tongue and the thermal pressure bar and to ensure a perfect compensation of the counter pressure to the thermal pressure bar.
  • the printhead characterized in claim 1.
  • the rubber roller previously used could be replaced by a redesign of the donor tongue.
  • a resilient, sheet-shaped counter-pressure element was created for this purpose, which can be inserted laterally into the dovetail-shaped milled tongue. This can be easily replaced and, due to its small size, enables printing directly at the beginning of the label and at the same time clings to the entire width of the print head.
  • the counterpressure element advantageously consists of a thin steel sheet. However, other materials are also suitable.
  • the pressure of the counter pressure element is made possible by resilient pressure elements.
  • the back pressure of the thermal bar is resiliently adjustable, the bearing between the dispensing tongue and pressure element allowing a rocking function for the printhead for lifting off the thermal pressure bar. This optimizes the transport of the transfer film, i.e. there is a saving of transfer film and a high dispensing speed.
  • the printhead according to the invention is generally designated 10.
  • the functioning of such a print head used in a labeling machine is described in more detail in the previously known utility model according to G 87 14 648, to which reference is hereby made.
  • the print head 10 In its foremost area on the left side, the print head 10 according to the invention has a dispensing tongue K which represents an elongated, practically rectangular rail.
  • This rail is milled on the underside in such a way that it has a dovetail-like structure, into which a thin steel sheet is inserted from the side under tension and curvature.
  • This steel sheet is the so-called counter-pressure element X, which bears against the thermal pressure bar N during the printing process.
  • the labels, not shown, to be printed run at high speed between the counter-pressure element X and the thermal print bar N.
  • the thermal print bar N At its rear end, the thermal print bar N has an electrical connection A, which is surrounded by a plastic insulation I, which is fastened to the print head with the fastening screw B.
  • Behind the dispensing tongue is the bearing P for the printhead 10 with its fastening webs E. Behind the bearing P there is an acting on the thermal print bar N on each side Pressure element Y and Z provided. These practically act as a counter-bearing to the resilient counter-pressure element X of the dispensing tongue K, so that the strength of the counter-pressure of the thermal bar can hereby be set.
  • the bearing point P thus represents the center of a rocker, whereby not only the strength of the pressure of the counter element X but also the lifting of the thermal pressure bar N is controlled.
  • the print head according to the invention is particularly compact and easy to maintain, so that high label dispensing speeds can be achieved with it.

Landscapes

  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)
  • Labeling Devices (AREA)

Claims (5)

  1. Tête d'impression pour le procédé d'impression thermique et d'impression par transfert thermique, comportant une plaque d'impression thermique (N) présentant des éléments thermiques qui y sont fixés contre une languette distributrice (K) pour l'impression directe d'une pluralité d'étiquettes disposées l'une derrière l'autre sur une bande, ainsi qu'un raccord pour un dispositif de commande, la plaque d'impression thermique portant, par l'intermédiaire de barrettes de fixation (E), avec liberté de pivoter vers le haut et vers le bas autour d'une portée (P), tête d'impression caractérisée par le fait que la languette distributrice (K) est fraisée en forme de queue d'aronde et par le fait qu'y est logé un élément de contre-pression (X) en forme de lame de ressort qui, pendant le processus d'impression, s'appuie contre la plaque d'impression thermique (N).
  2. Tête d'impression selon la revendication 1, caractérisée par le fait que l'élément de contre-pression (X) est inséré dans la languette distributrice (K) bombé vers l'extérieur, sous précontrainte.
  3. Tête d'impression selon les revendications 1 et 2, caractérisée par le fait que la languette distributrice (K) et l'élément de contre - pression (X) sont en métal et/ou en plastique.
  4. Tête d'impression selon les revendications 1 et 3, caractérisée par le fait que l'élément de contre-pression (X) est une tôle d'acier mince.
  5. Tête d'impression selon l'une ou plusieurs des revendications précédentes 1 à 5, caractérisée par le fait que sont prévus la portée (P) et un ou plusieurs éléments élastiques de pression (Y, Z) qui sont disposés par derrière et au moyen desquels la contre-pression de la plaque d'impression thermique (N) peut se régler élastiquement, la portée (P) présentant un axe formant bascule pour dégager la plaque d'impression thermique (N).
EP90113302A 1989-07-21 1990-07-12 Tête d'impression pour imprimante thermique et pour imprimante thermique de transfert Expired - Lifetime EP0409073B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8908865U 1989-07-21
DE8908865U DE8908865U1 (de) 1989-07-21 1989-07-21 Druckkopf für Thermodruck- und Thermotransferdruck

Publications (2)

Publication Number Publication Date
EP0409073A1 EP0409073A1 (fr) 1991-01-23
EP0409073B1 true EP0409073B1 (fr) 1993-05-12

Family

ID=6841293

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90113302A Expired - Lifetime EP0409073B1 (fr) 1989-07-21 1990-07-12 Tête d'impression pour imprimante thermique et pour imprimante thermique de transfert

Country Status (2)

Country Link
EP (1) EP0409073B1 (fr)
DE (2) DE8908865U1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE203458T1 (de) * 1996-12-20 2001-08-15 Wincor Nixdorf Gmbh & Co Kg Verfahren zur steuerung einer belegdruckeinrichtung und eine nach diesem steuerbare belegdruckeinrichtung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908946C2 (de) * 1978-03-08 1984-10-25 Canon K.K., Tokio/Tokyo Wärmedrucker mit einem Heizelemente aufweisenden Wärmedruckkopf
DE3609789A1 (de) * 1986-03-22 1987-10-01 Espera Werke Gmbh Thermodrucker fuer auf einen traegerstreifen abloesbar angebrachte etiketten und fuer streifenmaterial
JP2551410B2 (ja) * 1986-06-10 1996-11-06 株式会社 サト− 電子式ハンドラベラ
DE8714648U1 (de) * 1987-11-04 1987-12-17 Straßburg, Eberhard, 2110 Buchholz Druckkopf für Thermodruck- und Thermotransferdruck

Also Published As

Publication number Publication date
DE59001419D1 (de) 1993-06-17
EP0409073A1 (fr) 1991-01-23
DE8908865U1 (de) 1989-08-31

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