EP0958144A1 - Umwandelbarer thermischer druckmechanismus - Google Patents

Umwandelbarer thermischer druckmechanismus

Info

Publication number
EP0958144A1
EP0958144A1 EP96927100A EP96927100A EP0958144A1 EP 0958144 A1 EP0958144 A1 EP 0958144A1 EP 96927100 A EP96927100 A EP 96927100A EP 96927100 A EP96927100 A EP 96927100A EP 0958144 A1 EP0958144 A1 EP 0958144A1
Authority
EP
European Patent Office
Prior art keywords
roller
support
version
drive roller
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
EP96927100A
Other languages
English (en)
French (fr)
Other versions
EP0958144B1 (de
Inventor
Patrick Lardant
Pascal Pierre-Francois
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.)
Investix SA
Original Assignee
Investix SA
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
Priority claimed from FR9509245A external-priority patent/FR2737152B1/fr
Application filed by Investix SA filed Critical Investix SA
Publication of EP0958144A1 publication Critical patent/EP0958144A1/de
Application granted granted Critical
Publication of EP0958144B1 publication Critical patent/EP0958144B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J29/00Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02Framework
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/20Platen adjustments for varying the strength of impression, for a varying number of papers, for wear or for alignment, or for print gap adjustment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J15/00Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in continuous form, e.g. webs
    • B41J15/04Supporting, feeding, or guiding devices; Mountings for web rolls or spindles

Definitions

  • the present invention relates to a scalable thermal paper printing mechanism.
  • one or more lateral cams pivotally mounted about an axis at the front of the support, these cams used to raise the part which carries the printing bar to allow the introduction of paper between said bar and the roller during renewal of the supply coil.
  • retractable roller printers in which the drive roller is not fixed relative to the support but is mounted on a mechanism whose kinematics makes it possible to release the roller relative to the position it occupies in operation when the cover of the paper reserve is opened, so as to allow easy access to said drive roller to replace a strip of paper around it.
  • the object of the invention is to propose a dual structure, which allows in a few operations and by changing few parts to pass from a fixed roller printing mechanism to a retractable roller printing mechanism.
  • the invention provides a thermal printing mechanism comprising an elongated support, a drive roller, a strip of elements printing device mounted on said support, spring means for biasing said bar against the drive roller, at least one cam pivotally mounted about an axis of the support to move the bar away from the drive roller, said mechanism being characterized in that it is scalable mounting from a fixed roller version to a retractable roller version and in that the pivot axis of the drive roller is capable of being selectively mounted either on the support or on a paper cover articulated on said support, the cam of the fixed version being able to be replaced by at least one other cam intended to be driven by the tilting of the paper cover and vice versa.
  • This cover can be designed according to different aesthetic lines provided that its point of articulation is included in a precise zone, thus leaving the possibility of designing a paper tank of more or less significant capacity according to the embodiments, but which in all the case, allows easy introduction of paper.
  • the cam of the fixed version is capable of being replaced, in the retractable version, by two cams, one intended to allow the detachment of the print head at the start of the tilting of the paper cover, the other intended to be driven by the axis of the pickup roller, when it tilts with the paper cover, to continue lifting the print head.
  • the axis of the roller is received in lights presented by the paper cover, said lights cooperating with the support to maintain the axis of the roller in its printing operating position, when the cover is closed, said lights receiving in the fixed roller version bearings on which the roller is mounted swivel.
  • FIG. 1 is a sectional view of a printing mechanism according to a possible embodiment for the invention, in its fixed roller version;
  • FIG. 2 is a top view of this mechanism;
  • FIG. 3 is a similar view of Figure 1, in the case where the printing mechanism is in its retractable roller version;
  • - Figure 4a is a sectional view of the sides of the paper cover on which the roller is mounted in the retractable version of the mechanism;
  • FIG. 4b is a sectional view of the flanges of the support, in the case of the retractable version of the mechanism;
  • Figure 4c is a sectional view on which there is shown the sides of the paper cover of Figure 4a and the flanges of the support of Figure 4b;
  • FIG. 5 is a sectional view of a side of the paper cover which illustrates the retraction phase of the roll
  • FIGS. 7a and 7b are schematic side representations of a printing mechanism according to the invention in its retractable version, in which the area in which the axis of rotation of the cover is shown.
  • the printing mechanism illustrated in Figures 1 and 2 (fixed version) mainly comprises: an elongated support 1, which has two lateral flanges 1a,
  • a part 2 also elongated, which carries a strip 3 of thermal printing elements and which is pivotally mounted on the flanges 1a around an axis Ai towards the rear of the support 1,
  • a drive roller 4 which in the fixed roller version is pivotally mounted about an axis A by means of two end stop rings 12 in bearings 12a which have the flanges la, said roller s' extending opposite the bar 3 and being driven in rotation by a motor (not shown) to which it is connected by a pinion,
  • a lateral cam 5 pivotally mounted about an axis A 2 towards the front of the support 1 and intended by its tilting to allow the part 2 and the printing bar 3 to be lifted,
  • the paper of the feed reel is introduced by a guide ramp 1b which the support 1 presents and is guided around the roller 4 by the guide and by the geometry of the printing mechanism.
  • the operator causes the cam 5 to tilt in the opposite direction, so that the printing bar 3, which is biased relative to the support 1 by the two springs 7, folds down onto the paper.
  • This printing mechanism can easily be modified to evolve towards a retractable roller structure.
  • a cover CP for the protection of the paper reel is pivotally mounted around a fixed axis relative to the support
  • the cam 5 is replaced by two lateral cams 8 and 9, journalled around the axis A 2 at the front of the support 1. The assembly is then that illustrated in the figure
  • the operator switches from one version to another by removing the flanges la from the support 1 to extract the drive roller 4, by dismantling the bearings 12a relative to said flanges la, then, after having reassembled the flanges la, by integrating the support 1 for example to a molded carcass on which the paper cover CP is articulated.
  • the axis A of the roller 4 is then no longer fixed on the lateral flanges la but ends in the rings 12 which pass through said flanges la at the level of lights 13 ( Figure 4b) that have said flanges and which allow for the roll 4 the clearance which is described below in more detail.
  • These lights 13 are open towards the front of the printing mechanism. It is in these slots 13 that the bearings 12a are mounted in the fixed version illustrated in FIGS. 1 and 2.
  • These rings 12 are also received in lights L which have the sides of the cover CP (FIG. 4a) and which contribute, with the lights 13, to keep the rings 12 and said axis A in their printing operating position, when the cover CP is closed. These lights L are open towards the rear of the printing mechanism.
  • FIG. 4c shows the direction F of this effort.
  • the plane of the forces exerted by the head 3 on the roller 4 passes through the contact points of the axis of said drive roller 4 on the bottom of the openings.
  • This tilting takes place in two phases, one which allows the roller 4 to be moved away from the thermal print head 3, so as not to damage the latter, the other which allows the roller 4 to be tilted. to reassemble it (full opening of the paper cover).
  • a pin 11 presented by the cover CP (FIGS. 3 and 4a, 4c) abuts at the start of tilting of said cover CP on a lever part which has the cam 9, which causes the latter to pivot around its axis A2.
  • the lobe presented by said cam 9 acts on the part 2 which carries the print head 3 and moves it away from the roller 4.
  • the axis A of the roller 4, carried by the bottom of the lights 13 of the flanges la, remains stationary.
  • This tilting of the roller 4 occurs when the lower part of the bottom of the lights L comes into contact with the axis A and raises it ( Figure 5). The roller 4 is then driven with the cover CP.
  • the cover CP When the cover CP is completely tilted, the area of the roller 4 is completely accessible to the operator. Once the spool is in place in the paper reserve and the paper is correctly arranged around the drive roller, the cover CP is closed. The pin 11 abuts against a bearing 8c that has the cam 8, so as to tilt the cams 8 and 9 in the opposite direction relative to the opening operation. Initially, the cams 8 and 9 are tilted so that the roller 4 returns to its operating position; the paper being placed between the roll and the thermal printing bar.
  • the cam 9 continues its stroke so that the thermal printing bar 3 is pressed against the roller in its printing position.
  • This dual technique allows an industrialist (manufacturer of printers or cash registers) who would have obtained a printing mechanism in fixed roller version to later evolve towards a retractable roller version, and this at a lower cost, or have a single printing mechanism reference to design a complete fixed roller system and another retractable roller system without changing the electronics associated with either version.
  • thermal printing mechanism is essentially linked to its integration into an industrial process; therefore, the choice of a fixed roller printing mechanism can be made for a desire for miniaturization or because it must be introduced into an already existing device, while a retractable roller printing mechanism will be rather chosen to design a finished product in which the ease of introduction of the paper is the most important factor; the present invention allows with a single product to meet all of these requests, or even to evolve from one to the other.
  • FIGS. 7a and 7b Examples of possible geometries for the zone Z1 are illustrated in FIGS. 7a and 7b.
  • the part which carries the print head is advantageously designed so as to be able to support several types of print head.
  • the structure of the printing mechanism proposed by the invention can of course be proposed for several widths of paper, only the length of the support and possibly of the print head then being changed, the side pieces and in particular the cams being as for them unchanged.
  • thermo paper supports of different widths it is possible, using the same basic mechanism in a fixed roller or retractable roller version, to print thermal paper supports of different widths.
  • a device is used which makes it possible to maintain good guiding of the paper during printing.
  • the paper In the case of a fixed roller mechanism, the paper is guided between two sides.
  • One of these two sides is fixed relative to the support and serves as a reference for the paper guide and the positioning of the printing relative to the left edge of the paper.
  • the other side is materialized by a removable deflector.
  • This manually adjustable deflector in position makes it possible to obtain a given dimension between the sides and allows effective guiding of the paper during printing.
  • the support is designed at the base to integrate or not the deflector according to customer needs.
  • the deflector can occupy a multitude of positions. It is held in position by a fixed pitch notching system.

Landscapes

  • Handling Of Continuous Sheets Of Paper (AREA)
  • Ink Jet (AREA)
  • Electronic Switches (AREA)
  • Common Mechanisms (AREA)
  • Unwinding Webs (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Handling Of Cut Paper (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
EP96927100A 1995-07-28 1996-07-29 Umwandelbarer thermischer druckmechanismus Expired - Lifetime EP0958144B1 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9509245 1995-07-28
FR9509245A FR2737152B1 (fr) 1995-07-28 1995-07-28 Dispositif d'impression thermique evolutif
FR9606498 1996-05-24
FR9606498A FR2737153B1 (fr) 1995-07-28 1996-05-24 Mecanisme d'impression thermique evolutif
PCT/FR1996/001193 WO1997004966A1 (fr) 1995-07-28 1996-07-29 Mecanisme d'impression thermique evolutif

Publications (2)

Publication Number Publication Date
EP0958144A1 true EP0958144A1 (de) 1999-11-24
EP0958144B1 EP0958144B1 (de) 2004-01-14

Family

ID=26232128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96927100A Expired - Lifetime EP0958144B1 (de) 1995-07-28 1996-07-29 Umwandelbarer thermischer druckmechanismus

Country Status (7)

Country Link
US (1) US6011571A (de)
EP (1) EP0958144B1 (de)
AT (1) ATE257772T1 (de)
CA (1) CA2228699A1 (de)
DE (1) DE69631345T2 (de)
FR (1) FR2737153B1 (de)
WO (1) WO1997004966A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2786727B1 (fr) 1998-12-02 2001-06-01 A P S Engineering Dispositif d'impression thermique a fermeture rapide
JP2002046294A (ja) * 2000-08-02 2002-02-12 Fuji Photo Film Co Ltd 感熱プリンタ
JP3910465B2 (ja) * 2002-02-22 2007-04-25 セイコーインスツル株式会社 サーマルプリンタ
KR100677585B1 (ko) * 2005-05-20 2007-02-02 삼성전자주식회사 Tph를 채용하는 화상형성장치
US7270494B2 (en) * 2005-12-05 2007-09-18 Silverbrook Research Pty Ltd Easy assembly printer media transport arrangement
JP2007331112A (ja) * 2006-06-12 2007-12-27 Seiko Epson Corp サーマルプリンタ

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5139351A (en) * 1987-10-22 1992-08-18 Ricoh Company, Ltd. Thermal recording apparatus having a movable platen roller
US5030968A (en) * 1988-12-30 1991-07-09 Benson James A Recorder enclosure with printhead and roller attached to pivotable covers
US5133611A (en) * 1989-10-19 1992-07-28 Canon Kabushiki Kaisha Recording apparatus
US5198836A (en) * 1989-12-11 1993-03-30 Seiko Instruments Inc. Compact line thermal printer
DE3943239A1 (de) * 1989-12-22 1991-06-27 Siemens Ag Bildaufzeichnungseinrichtung
FR2697776B1 (fr) * 1992-11-06 1995-03-03 Axiohm Dispositif d'impression thermique ouvrant.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9704966A1 *

Also Published As

Publication number Publication date
EP0958144B1 (de) 2004-01-14
WO1997004966A1 (fr) 1997-02-13
FR2737153B1 (fr) 1999-01-29
ATE257772T1 (de) 2004-01-15
US6011571A (en) 2000-01-04
DE69631345D1 (de) 2004-02-19
CA2228699A1 (fr) 1997-02-13
DE69631345T2 (de) 2004-07-01
FR2737153A1 (fr) 1997-01-31

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