WO1998040221A1 - Mecanisme d'impression compact - Google Patents
Mecanisme d'impression compact Download PDFInfo
- Publication number
- WO1998040221A1 WO1998040221A1 PCT/FR1998/000487 FR9800487W WO9840221A1 WO 1998040221 A1 WO1998040221 A1 WO 1998040221A1 FR 9800487 W FR9800487 W FR 9800487W WO 9840221 A1 WO9840221 A1 WO 9840221A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- roller
- chassis
- head
- printing
- frame
- Prior art date
Links
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
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/02—Framework
-
- 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
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
- B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal heads
Definitions
- the present invention relates to a printing mechanism, intended to make possible the production of an ultra-compact mechanism.
- a printing mechanism intended to make possible the production of an ultra-compact mechanism.
- a mechanism for mounting a thermal print head comprising a frame and a roller which is rotatably mounted between the two side walls of the frame, and a print head which is mounted facing the frame, between the side walls.
- the mechanism further includes a pressure member assembled in rotation with the frame and adapted to bring the print head into pressure contact with the roller and a pressure lever assembled in rotation with the frame. The pressure element is supported by the lever so as to compress the print head with the roller.
- the mechanism includes a frame, a print head and a roller and a spring that presses the print head against the roller.
- the mechanisms described in these documents essentially relate to means for bringing the roller and the print head into contact by pressure. However, we want to reduce the volume of known mechanisms. These mechanisms are such that the frame is most often made of plastic.
- the main drawback of plastic when it comes to wanting to further reduce the volume of the mechanism is its rigidity. Indeed, the critical point of a thermal printing mechanism is to achieve a good alignment between the generator of the roller and the line of dots of the print head. However, when the thickness of the mechanism decreases, it is necessary to reduce the diameter of the roller, which results in an increasingly smaller contact surface (or "flat" of the roller).
- One of the most difficult problems to solve in the case of compact mechanisms is that of the alignment of the roller, guiding the paper, with the print head. The more compact the mechanism, the smaller the diameter of the roller. Thus, the contact surface between the roller and the print head always becomes smaller and alignment becomes more and more difficult to achieve.
- the only solution for producing compact mechanical parts of small dimensions consists in making the printing frame in a single plastic part which carries all the elements for holding the mechanical parts (gears, head of printing, roller, motors, and sensors).
- the problem is that the mechanical stability of this chassis is no longer sufficient when it is subjected to mechanical stresses such as the application of pressure on the print head, even when this pressure is applied symmetrically on the frame.
- the effects of thinness and alignment problems are significantly increased.
- the invention proposes to solve the problem of aligning the generator of the roller with the line of dots of the print head, by stiffening the print frame using a specific member.
- the problem with aligning the roller with the head can be summed up by the fact that the plastic frame twists when stress is applied to it.
- the invention relates to a thermal printing mechanism comprising, a chassis, a motor and gears driving a roller, a thermal printing head, a member for pressing the head on the roller, characterized in that 'It comprises a stiffening member secured at least vertically to two of the distinct sides of the chassis and at least in rotation about an axis substantially perpendicular to a third side of the chassis, or, at least in rotation of two of the sides of the chassis.
- a plate of sufficient thickness (here, 1.5 mm) is installed in order to prevent the chassis from twisting.
- the plate constitutes the final phase of assembly (before the printing test), and is only fixed with a single self-tapping screw, because an internal interlocking system, without adding a drawer in the mold, allows to block any vertical movement of the sides of the chassis relative to the bottom.
- the rigidity thus obtained is such that the deformation when the head of the chassis is raised is zero.
- the mechanism is such that the stiffening member is a plate which engages between two studs on each of the sides of the chassis, offset horizontally, and in that said plate is held integral in rotation about an axis substantially perpendicular to the bottom of the chassis using a fixing member which is a single screw.
- the mechanism according to the invention is such that the fixing member passes through the mechanism right through and ensures a rotation lock relative to the two faces supporting the printing roller.
- the mechanism is such that the stiffening member has fixing points for the printing mechanism.
- the mechanism may also include a lever acting on only one side of the print head performing the triple function of user control, control of the position sensor, and direct control of the lifting of the head.
- this system stiffens the entire chassis making alignment particularly easy. It is then possible to fix other mechanical elements to the chassis without risk (paper rewinder, paper roll support, etc.).
- the stiffening member can consist of a printed circuit which is capable of stiffening the chassis while assuming an electronic function, such as controlling the printer.
- the stiffening member makes it possible to always keep the two sides of the mechanism aligned with each other and thus eliminates any potential twisting.
- a first possible organization is the use of a stiffening plate, integral with each of the two lateral sides, and therefore in the event of misalignment on the two sides, a rotation of the plate occurs. It is then no longer perpendicular with the sides, in particular with the background. It has an angle in the horizontal plane with the background. The principle then consists in keeping it firmly (according to three support points) flat with a plane perpendicular to the bottom of the mechanism, which immobilizes any potential rotation of the plate.
- the plate according to the invention represents the final phase of the assembly of the mechanism, it only requires a single self-tapping screw making its attachment particularly easy, it is moreover the only screw of the mechanism. It is inserted between studs located inside the chassis and offset which allows easy release of the part, easy insertion of said plate, and a single fixing screw.
- the plate is wide and takes up a lot on the sides of the mechanism, presenting a large lever arm and therefore an even higher torsional resistance. As it is assembled during the final assembly phase, it does not interfere with the previous phases, in particular the assembly of the motor (lateral and interior, nor that of the print head (insertion inside and rotation).
- this lever is applied directly against the head support consisting of a metal plate, configuration could not be more simple, and also realizes the pressure on the high position detection switch.
- the invention further relates to a pinion for locking the roller in its housing, for locking itself on the roller (clipping) and performs a bearing function between the roller and the chassis of the printer.
- roller performs the bearing function makes it possible to increase its length, which makes it possible to house a clipping without increasing the volume.
- This innovation increases the number of parts to perform these functions from three to one: it generally requires a separate bearing from the gear, a gear and a locking clip. Moreover, assembly is done by simple manual insertion of the gear in the roller after positioning of the latter in its housing. The noise of the clipping acting as verification of correct insertion.
- Figure 1 is a top view of the mechanism according to the present invention.
- Figure 2 is a view of a stiffening plate according to the invention.
- Figure 3 is an exploded view of the pinion according to the invention.
- the mechanism according to the invention comprises a printing frame 1 which has two longitudinal sides 2, 3 and two transverse sides 4, 5, a motor 6 and gears driving a roller 7.
- the mechanism comprises, in known manner, a head printing (8), for example thermal.
- the mechanism comprises a pressure member 9 on the roller 7.
- the plate 8 is kept in pressure against the roller 7 by means of a spring 9.
- the mechanism comprises a stiffening member 10.
- this stiffening member 10 is a plate, for example of metal or of hard synthetic material. This plate 10 is such that it is secured at least vertically to two of the separate sides of the chassis and at least in rotation about an axis substantially perpendicular to a third side of the chassis or at least in rotation on both sides of the chassis.
- the plate 10 is fixed by means of a screw 13.
- This screw 13 passes through the mechanism from side to side and ensures a rotation lock relative to the two faces supporting the printing roller 7.
- the lever 14 which acts on the print head 8.
- This lever is integral with one end of the roller 7.
- This lever 14 operates in the following manner: the separation of the head 8 from the roller 7 is done by pushing the lever down. It also presses switch 15.
- FIG 3 there is shown the pinion 16 which allows to lock the roller 7 which passes through a hole made in the lateral side 2 of the frame.
- the axis of the roller has a groove 17 for clipping the roller.
- the roller further comprises a bearing 18 between the roller and the lateral side 2 of the chassis.
- the mechanism according to the invention has many advantages: It can keep its compactness when it is desired to increase the printing width. It allows very flat mechanisms to be produced by the use of a small diameter roller. It allows to keep a simple assembly in spite of its compactness and it allows to realize a large printing width mechanism while keeping the same thickness.
Landscapes
- Electronic Switches (AREA)
- Common Mechanisms (AREA)
- Pens And Brushes (AREA)
- Finger-Pressure Massage (AREA)
- Dot-Matrix Printers And Others (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Ink Jet (AREA)
- Handling Of Sheets (AREA)
- Prostheses (AREA)
- Toys (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/380,878 US6338584B1 (en) | 1997-03-11 | 1998-03-11 | Compact printing mechanism |
DE69801986T DE69801986T2 (de) | 1997-03-11 | 1998-03-11 | Kompakter drucker |
DK98913884T DK0969970T3 (da) | 1997-03-11 | 1998-03-11 | Kompakt trykkemekanisme |
EP98913884A EP0969970B1 (fr) | 1997-03-11 | 1998-03-11 | Mecanisme d'impression compact |
AU68416/98A AU6841698A (en) | 1997-03-11 | 1998-03-11 | Compact printing mechanism |
AT98913884T ATE206663T1 (de) | 1997-03-11 | 1998-03-11 | Kompakter drucker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR97/02861 | 1997-03-11 | ||
FR9702861A FR2760684B1 (fr) | 1997-03-11 | 1997-03-11 | Mecanisme d'impression compact |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998040221A1 true WO1998040221A1 (fr) | 1998-09-17 |
Family
ID=9504600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1998/000487 WO1998040221A1 (fr) | 1997-03-11 | 1998-03-11 | Mecanisme d'impression compact |
Country Status (10)
Country | Link |
---|---|
US (1) | US6338584B1 (fr) |
EP (1) | EP0969970B1 (fr) |
AT (1) | ATE206663T1 (fr) |
AU (1) | AU6841698A (fr) |
DE (1) | DE69801986T2 (fr) |
DK (1) | DK0969970T3 (fr) |
ES (1) | ES2166158T3 (fr) |
FR (1) | FR2760684B1 (fr) |
PT (1) | PT969970E (fr) |
WO (1) | WO1998040221A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110435307A (zh) * | 2019-08-29 | 2019-11-12 | 安徽省鹰鹭麻油有限公司 | 一种芝麻油包装箱喷墨设备的固定设备 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2796001B1 (fr) | 1999-07-09 | 2001-10-05 | A P S Engineering | Dispositif de deverrouillage d'un compartiment d'un mecanisme ouvrant |
FR2837423B1 (fr) * | 2002-03-21 | 2004-06-18 | A P S Engineering | Mecanisme d'impression thermique, notamment applicable aux terminaux de paiement |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4688692A (en) * | 1984-03-30 | 1987-08-25 | Siemens Aktiengesellschaft | Joining apparatus for sheet metal assembly of appliance housings |
US4944621A (en) * | 1988-12-22 | 1990-07-31 | Burdick Corporation | Self-contained printhead/paperdrive mechanism |
EP0433063A1 (fr) * | 1989-12-14 | 1991-06-19 | Kabushiki Kaisha Shinsei Industries | Imprimante pour étiquettes |
GB2259277A (en) * | 1991-09-03 | 1993-03-10 | Rohm Co Ltd | Mounts for thermal printing heads |
EP0659574A2 (fr) | 1993-12-27 | 1995-06-28 | Seiko Instruments Inc. | Imprimante |
JPH0811332A (ja) * | 1994-06-30 | 1996-01-16 | Rohm Co Ltd | 熱印字装置 |
EP0718110A1 (fr) | 1994-12-19 | 1996-06-26 | Seiko Instruments Inc. | Montage d'une tête d'impression thermique |
EP0738606A1 (fr) | 1994-11-08 | 1996-10-23 | Seiko Instruments Inc. | Imprimante |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5721471B2 (fr) * | 1972-03-27 | 1982-05-07 | ||
JPS5838184A (ja) * | 1981-08-31 | 1983-03-05 | Canon Inc | 非衝撃式印字装置 |
JPH0473175A (ja) * | 1990-07-13 | 1992-03-09 | Tokyo Electric Co Ltd | プリンタ |
CH687324A5 (fr) * | 1992-02-10 | 1996-11-15 | Bobst Sa | Cadre de support momentané d'un élément en plaque horizontal au sein d'une machine. |
US6102509A (en) * | 1996-05-30 | 2000-08-15 | Hewlett-Packard Company | Adaptive method for handling inkjet printing media |
US5993091A (en) * | 1997-01-08 | 1999-11-30 | Brother Kogyo Kabushiki Kaisha | Ink ribbon feeder that equalizes ribbon tension over the entire ink ribbon width |
EP0955172B2 (fr) * | 1998-05-05 | 2008-11-26 | Maurer Electronics Gmbh | Procédé et cassette pour imprimer sur un objet du type livret |
-
1997
- 1997-03-11 FR FR9702861A patent/FR2760684B1/fr not_active Expired - Fee Related
-
1998
- 1998-03-11 AT AT98913884T patent/ATE206663T1/de not_active IP Right Cessation
- 1998-03-11 PT PT98913884T patent/PT969970E/pt unknown
- 1998-03-11 AU AU68416/98A patent/AU6841698A/en not_active Abandoned
- 1998-03-11 DE DE69801986T patent/DE69801986T2/de not_active Expired - Lifetime
- 1998-03-11 WO PCT/FR1998/000487 patent/WO1998040221A1/fr active IP Right Grant
- 1998-03-11 EP EP98913884A patent/EP0969970B1/fr not_active Expired - Lifetime
- 1998-03-11 US US09/380,878 patent/US6338584B1/en not_active Expired - Lifetime
- 1998-03-11 DK DK98913884T patent/DK0969970T3/da active
- 1998-03-11 ES ES98913884T patent/ES2166158T3/es not_active Expired - Lifetime
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4688692A (en) * | 1984-03-30 | 1987-08-25 | Siemens Aktiengesellschaft | Joining apparatus for sheet metal assembly of appliance housings |
US4944621A (en) * | 1988-12-22 | 1990-07-31 | Burdick Corporation | Self-contained printhead/paperdrive mechanism |
EP0433063A1 (fr) * | 1989-12-14 | 1991-06-19 | Kabushiki Kaisha Shinsei Industries | Imprimante pour étiquettes |
GB2259277A (en) * | 1991-09-03 | 1993-03-10 | Rohm Co Ltd | Mounts for thermal printing heads |
EP0659574A2 (fr) | 1993-12-27 | 1995-06-28 | Seiko Instruments Inc. | Imprimante |
JPH0811332A (ja) * | 1994-06-30 | 1996-01-16 | Rohm Co Ltd | 熱印字装置 |
EP0738606A1 (fr) | 1994-11-08 | 1996-10-23 | Seiko Instruments Inc. | Imprimante |
EP0718110A1 (fr) | 1994-12-19 | 1996-06-26 | Seiko Instruments Inc. | Montage d'une tête d'impression thermique |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 096, no. 005 31 May 1996 (1996-05-31) * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110435307A (zh) * | 2019-08-29 | 2019-11-12 | 安徽省鹰鹭麻油有限公司 | 一种芝麻油包装箱喷墨设备的固定设备 |
Also Published As
Publication number | Publication date |
---|---|
EP0969970B1 (fr) | 2001-10-10 |
US6338584B1 (en) | 2002-01-15 |
AU6841698A (en) | 1998-09-29 |
PT969970E (pt) | 2002-03-28 |
ATE206663T1 (de) | 2001-10-15 |
FR2760684A1 (fr) | 1998-09-18 |
EP0969970A1 (fr) | 2000-01-12 |
ES2166158T3 (es) | 2002-04-01 |
DE69801986T2 (de) | 2002-06-27 |
FR2760684B1 (fr) | 1999-05-07 |
DK0969970T3 (da) | 2002-02-11 |
DE69801986D1 (de) | 2001-11-15 |
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