EP0225498B1 - Farbbanddruckeraufbau mit integralem Farbbandschutz und Druckverfahren eines Dokumentes - Google Patents
Farbbanddruckeraufbau mit integralem Farbbandschutz und Druckverfahren eines Dokumentes Download PDFInfo
- Publication number
- EP0225498B1 EP0225498B1 EP19860115605 EP86115605A EP0225498B1 EP 0225498 B1 EP0225498 B1 EP 0225498B1 EP 19860115605 EP19860115605 EP 19860115605 EP 86115605 A EP86115605 A EP 86115605A EP 0225498 B1 EP0225498 B1 EP 0225498B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ribbon
- shield
- paper
- document
- print head
- 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
Links
Images
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
- B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
- B41J35/26—Ink-ribbon shields or backings
-
- 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 present invention relates to apparatus for printing information on paper. More particularly, the present invention relates to a ribbon shield apparatus for preventing unwanted contact between the ribbon and the paper (causing ink smudges on the paper) during relative movement of the ribbon and paper.
- printer shields are known in the prior art. Examples of these include those shown in U.S. Patents 4,165,188; 4,285,604; 4,437,401; and 4,496,256 and in IBM Technical Disclosure Bulletin Vol. 16, No. 3, August 1973, p. 834; Vol. 26, No. 1, June 1983, p. 65 and p. 73.
- US-A-4,383,775 discloses a ribbon assembly for a printer including a moving print head for printing on paper the ribbon assembly comprising: means for supporting and guiding the ribbon to position a desired portion of the ribbon between the print head and the paper when said assembly is mounted in the printer, said ribbon supporting and guiding means being mountable on the print head and movable therewith; means for transporting the ribbon from a ribbon supply to the ribbon supporting and guiding means and from that means to a ribbon take-up, said transporting means being secured to the ribbon supporting and guiding means; a resilient ribbon shield mounted to the ribbon supporting and guiding means and bowed outwardly toward the position of the paper to contact the paper and provide a pressure contact against the paper and the platen when the ribbon is mounted to the printer, said ribbon shield including at least one aperture to allow printing to occur therethrough but providing protection against other portions of the ribbon contacting the paper in unwanted regions and providing, through the pressure contact of the ribbon shield against the paper, sound dampening to reduce the noise from printing which travels form the printing region, wherein
- the frictional or pressure engagement of the ribbon shield against the paper allows a pass of the print head (without printing) to flatten a document which has been folded or bent.
- This pass of the print head across the width of the document serves to urge the document into a nip of opposed upper rollers carried on the paper modules of the Paper Module Patent, for example.
- the paper can be directed in a desired direction in an automatic operation of the printer, without requiring time and efforts of an attendant.
- Such automatic operation clearly reduces the difficulty and labour cost of the operation.
- FIG. 1 is a perspective view of a printer useful in the present invention.
- FIG. 2 is a perspective view of a ribbon cartridge including a printer ribbon shield for the printer of FIG. 1.
- FIG. 3 is a partial side view of the printer of FIG. 1, partially cut away along the line III-III in FIG. 1 with a ribbon cartridge of the type shown in FIG. 2 mounted therein.
- FIG. 4 is an enlarged view of the ribbon guide and ribbon shield of the present invention, with the ribbon itself removed.
- FIG. 5 is a perspective view of a ribbon shield of an alternate design to that shown in FIG. 2.
- FIG. 6 is a partial side view of the alternate design ribbon shield of FIG. 5 mounted in the printer of FIG. 1. As such, this view is analogous to FIG. 3, but using a different ribbon and ribbon shield.
- FIG. 7 is a partial cross-sectional view of a ribbon, ribbon guide and ribbon shield of the alternate embodiment ribbon of FIGS. 5 and 6, taken along the line VII-VII in FIG. 6.
- a printer 10 includes an outer housing 15 which generally covers the inner working parts of the printer 10.
- An access cover 16 is hingedly connected at its upper rear portion to the outer housing 15.
- the hinged junction of the access cover 16 and the outer housing 15 provides a paper exit slot, broadly indicated by the reference numeral 17.
- an inclined surface on the housing defines a paper entry slot 18.
- An operator control panel 19 is positioned adjacent the paper path between the paper entry slot 18 and the paper exit slot 17 and provides communication between the printer and the operator.
- FIG. 2 shows a perspective view of a ribbon cartridge assembly 20 having a ribbon 21 which is guided from a ribbon box 22 to a ribbon guide 23 (also referred to as a "nose piece" in the Ribbon Guide Patent) in a flexible leader or guide belt 24.
- the preferred form of a flexible leader or guide belt is shown in the Ribbon Guide Patent.
- the ribbon 21 is preferably a four colour ribbon in which longitudinal bands 21a, 21b, 21c, 21d of four different colours are each separated from the adjacent band by an ink barrier 21e.
- a ribbon shield 25 is secured by rivets 26 to the ribbon guide 23 at each of its four corners.
- the ribbon shield 25 is made of a thin piece of plastic such as the plastic film sold under the trademark Mylar and is longer than the distance between the ends of the ribbon guide 23 at the ends so that the ribbon shield 25 bows outward from the ribbon guide 23. Since the ribbon shield 25 is made of clear plastic material in its preferred embodiment, the multi-colour bands of the ribbon 21 are seen through the ribbon shield 25 in this view.
- the ribbon guide includes a plurality of apertures 25a, 25b, 25c, 25d, each aligned with one of the colour bands of the ribbon and positioned in front of the print head (not shown in this view) when that colour is being printed.
- a rack 23a portion of the ribbon guide 23 is shown as described in the Ribbon Positioning Patent to lift the ribbon 21, the ribbon guide 23 and the ribbon shield 25 to change colour of printing.
- the ribbon shield 25 includes an inwardly bent tab 27 (which extends toward the ribbon guide 23 and the print head and away from the paper at approximately a 45 degree angle) which allows the ribbon to be lifted for a change of colour without snagging even if printing is at the top of a page which has an outfold immediately above.
- the bottom of the ribbon shield 25 is provided with two inwardly bent projections 28 which allow shifting of a ribbon even toward the bottom of a page which is immediately above an outfold. Again, the projections extend inwardly at about a 45 degree angle.
- the lower projections are a pair of projections, each spaced from the center line to allow the ribbon and ribbon shield to be inserted over the print head with a minimum thickness (the ribbon shield itself) in the lower center region which must pass between the print head and the platen.
- the ribbon 21 shown and described in the foregoing embodiment is a multi-colour ribbon of the type used in a colour printer.
- the ribbon positioning and ribbon shield of the present invention are equally useful in a multi-band, single colour ribbon.
- all bands are of a single colour such as black, but it is desirable to use first one band, then sequentially move the ribbon to the next band until it is completely used.
- FIG. 3 shows a cut-away partial side view of the printer 10 including the ribbon 21 and ribbon shield 25.
- a platen 30 is shown, with lower paper guide 31 and upper paper guide 32 shown directing paper 33 between the platen 30 and a print head carriage 34.
- the ribbon box 22 is mounted to the frame of the printer (not shown).
- the carriage 34 moves along a support rod 35.
- the ribbon shield 25 includes the apertures 25a, 25b, 25c, 25d and the upper bent portion 27 and the lower bent portions 28.
- FIG. 4 is a front view of the ribbon shield 25.
- the shield consists of a thin piece of flexible and resilient plastic film material such as is sold under the trademark Mylar.
- Apertures 25a, 25b, 25c, 25d are located medially along the width of the ribbon shield 25 and are arranged one above the other. Each aperture is positioned to be medial along the height of one ribbon section so that printing can be confined to a predetermined vertical region of the ribbon.
- the rivets 26 mount the ribbon shield 25 to the ribbon guide 23 through mounting holes located toward each of the four corners of the ribbon shield 25.
- FIG. 5 is a perspective view of an alternate embodiment of the present invention, in which a ribbon shield 40 includes a central section 41 which is bowed outward and into a pressure contact with the paper and the platen when the ribbon shield is mounted to the ribbon guide (not shown in this FIG.).
- the central section 41 includes an aperture 42 through which printing may occur, which aperture is aligned with the print head and a selected region of the ribbon.
- This aperture 42 is preferably defined by generally parallel upper and lower edges and semi-circular ends connecting the upper and lower edges in a rounded arc which makes snagging of the ribbon unlikely.
- An upper projection 43 is bent inwardly at approximately a 45 degree angle to provide a ramp which prevents the upper outfolds from catching on the ribbon shield.
- indented sections 45, 46 Immediately adjacent to the central section 41 are indented sections 45, 46 which are spaced rearwardly of the central section.
- Remote ramps 47, 48 are spaced outwardly from the indented sections 45, 46, respectively, and project back outwardly from the indented sections.
- these indented sections 45, 46 allow a pair of retaining clips to pass forward of the indented sections 45, 46 while the retaining clips remain behind a plane passing from the outer edge of the center section 41 to the adjacent remote ramp, 47 or 48. In this manner, paper supported by the platen may pass smoothly over the ramps 47 or 48 and the central section 41 without catching in the clips which secure the ribbon shield 40 in place, all as depicted in connection with FIG. 7.
- Apertures 49 in the indented sections 45, 46 reduce drag on the ribbon as the ribbon passes by the indented sections.
- FIG. 6 illustrates a portion of the printer 10 with the ribbon and ribbon guide of the alternate embodiment of the present invention.
- the printer 10 includes a ribbon box 22 from which a ribbon 54 is threaded to a ribbon guide 55 and back to the ribbon box 22.
- the print head 34 is mounted to the guide rod 35.
- Lower paper guide 31 and upper paper guide 32 are shown directing paper 33 through a lower set of feed rolls 52 and an upper set of feed rolls 53, as might be done with document insertion device (DID) feed modules of the type described in the Paper Module Patent.
- DID document insertion device
- the ribbon shield 40 and its upper and lower projections 43, 44 as well as the aperture 42 are depicted in this view.
- FIG. 7 illustrates a cross-sectional view of the assembly of FIG. 6, cut along the line VII-VII looking in the direction of the arrow.
- the print head 34 is shown between ribbon guide portions 55.
- Clips 56 extend forward of the ribbon 54 and the ribbon shield in the region of the indented portions 45, 46. These clips extend upwardly, from their connection to the ribbon guide below the ribbon and the ribbon shield, and latch above the upper surface of the ribbon and the ribbon shield, captivating both.
- Aperture 42 is shown in the ribbon shield, through which printing may occur, as well as the apertures 49 in the indented portions.
- the ramps 47, 48 at the distal ends of the ribbon shield are also shown, as is the fact that the clips 56 are depressed below the surface of the ribbon shield central section 41 as it extends to the distal sections 47, 48.
- the paper 33 and the platen 30 are also shown in this view.
- the ribbon shield of either embodiment is, as stated above, advantageously longer in length than the distance between the mounting points, causing it to bow outward and into the paper.
- This bowing puts the ribbon shield into an interference location, as its desired location would be to project perhaps 2 millimeters further.
- This interference causes the ribbon shield to press against the paper and reduce the noise created by the printing operation by one, two or more decibels, depending on the design.
- the present invention (particularly the alternate embodiment using a single-colour ribbon and the paper module illustrated in FIGS. 5-7) has particular application to the use of the interchangeable paper modules disclosed in the referenced Paper Module Patent.
- a cut-paper form such as a rental car agreement may be fed into the printing region after it has been carried by the renter.
- the form may have been folded, creased, or otherwise wrinkled or distorted.
- the present invention comtemplates that such a paper may not be smooth and flat (even moisture can cause paper to wrinkle) and properly directed to feed from the printing station upward into the nip of the rolls of the upper paper handling apparatus.
- a longitudinal traverse of the paper by the print head with the ribbon guide in pressure contact with the paper, will flatten the paper and guide it into the desired position in the nip between the rolls, allowing the paper to pass out through the upper rolls after printing. While this traverse pass of the print head is preferably across the entire page to "iron" or flatten the entire width of the document across its upper edge, some lesser traverse also has a similar advantageous effect of removing or reducing the effect of wrinkles or folds.
Landscapes
- Impression-Transfer Materials And Handling Thereof (AREA)
- Handling Of Sheets (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Claims (7)
- Eine Farbbandbaugruppe (20) für einen Drucker (10) mit beweglichem Druckkopf, zum Drucken auf Papier (33), wobei die Farbbandbaugruppe folgendes umfaßt:
Mittel (23, 55) zum Halten und Führen des Farbbandes (21, 54), um einen gewünschten Abschnitt des Farbbandes zwischen Druckkopf und Papier in Position zu bringen, wenn die Baugruppe am Drucker angebracht wird, wobei die Mittel zum Halten und Führen des Farbbandes am Druckkopf angebracht sind und mit diesem zusammen bewegt werden können;
Mittel (24), um das Farbband (21, 54) von einer Farbbandkassette (22) zum Mittel zum Halten und Führen des Farbbandes (23) und von diesem wieder zurück zur Farbbandkassette (22) zu transportieren, wobei das Transportmittel (24) am Mittel zum Halten und Führen des Farbbandes (23) befestigt ist;
ein federnder Farbbandschutz (25, 40), der an das Mittel zum Halten und Führen des Farbbandes (23) angebracht ist und nach außen in Richtung des Papiers (33) gebogen ist, um Kontakt mit dem Papier herzustellen und einen Druckkontakt auf Papier (33) und Walze (30) auszuüben, wenn das Farbband in den Drucker (10) eingelegt wird, wobei der Farbbandschutz wenigstens eine Öffnung (25a-d, 42) umfaßt, durch die einerseits der Druckvorgang ermöglicht wird, die andererseits aber Schutz davor bietet, daß andere Abschnitte des Farbbandes an nicht gewünschten Stellen mit dem Papier in Berührung kommen,
wobei darüberhinaus der Farbbandschutz (25) oder der zentrale Abschnitt (41) desselben über einen durchweg flachen Korpus und einen unteren Überhang (28, 44) verfügt, der nach innen in Richtung des Farbbandes (21, 54) und vom Papier weg gebogen ist, und der dadurch gekennzeichnet ist, daß der Farbbandschutz (25) oder der zentrale Abschnitt (41) desselben zumindest einen oberen Überhang (27, 43) und zumindest zwei untere Überhänge (28, 44) umfaßt,
und wobei der obere Überhang (27, 43) des Farbbandschutzes (25, 41) ein einzelner Überhang ist, der exakt über der gedachten vertikalen Mittellinie des Farbbandschutzes liegt, und der untere Überhang zwei Überhänge (28, 44) umfaßt, die beiderseits der vertikalen Mittellinie des Farbbandschutzes liegen, um Kontakt mit dem Druckkopf (34) zu vermeiden, wenn die Farbbandbaugruppe (20) über dem Druckkopf installiert wird. - Eine Farbbandbaugruppe (20) nach Anspruch 1, wobei der Farbbandschutz ein aus Kunststoff bestehendes Einzelteil (25) ist, das an seinen beiden Seiten (26) befestigt ist und in der Mitte mit einer Mehrzahl von übereinanderliegenden Öffnungen (25a-d) ausgestattet ist und jede dieser Öffnungen an einem dazugehörigen Einzelband (21a-d) eines Vielfachfarbbandes (21) anliegt, und die Mittel (23) zum Halten und Führen des Farbbandes über Mittel (23a) verfügt, um jedes ausgewählte Einzelband und die dazugehörige Öffnung so auf einen Druckkopf (34) auszurichten, daß der Druckvorgang mit dem ausgewählten Einzelband durch die dazugehörige Öffnung stattfindet.
- Eine Farbbandbaugruppe (20) nach Anspruch 1 oder 2, wobei der Farbbandschutz (40) nach innen gebogene Bereiche (45, 46) umfaßt, die zu beiden Seiten des zentralen Abschnitts (41) liegen, der wiederum über die Öffnung (42) verfügt, durch die der Druckvorgang stattfindet, und darüberhinaus umfassen die Mittel (55) zum Halten und Führen des Farbbandes (54) Befestigungsmittel (56), die den Farbbandschutz festhalten, wobei die nach innen gebogenen Bereiche es ermöglichen, daß ein Bereich des Befestigungsmittels vor den nach innen gebogenen Bereichen, aber hinter der Erweiterung der vom zentralen Abschnitt (41) des Farbbandschutzes gebildeten Oberfläche liegt, wodurch die Möglichkeit verringert wird, daß das Papier (33) auf dem Befestigungsmittel schleift.
- Eine Farbbandbaugruppe (20) nach Anspruch 3, wobei der Farbbandschutz (40) Rampen (47, 48) umfaßt, die über die nach innen gebogenen Bereiche (45, 46) überhängen und eine gedachte Ebene zwischen den Rampen und dem zentralen Abschnitt (41) des Farbbandschutzes (40) über die Befestigungsmittel (56) hinaussteht, wodurch die Möglichkeit verringert werden kann, daß das Papier auf dem Befestigungsmittel schleift.
- Eine Farbbandbaugruppe (20) nach einem der vorhergehenden Ansprüche, wobei sowohl die oberen als auch die unteren Überhänge des Farbbandschutzes mit einem Winkel von ungefähr 45 Grad von der Ebene des Farbbandschutzes abstehen.
- Eine Methode, den oberen Rand eines Dokuments (33) abzuflachen, das in einem Drucker (10) bedruckt werden soll, dessen Druckkopf (34) horizontal über das Dokument bewegt wird, wobei das Dokument mit der Rückseite auf einer Walze (30) aufliegt, und wobei sich zwischen dem Druckkopf und dem Dokument ein Farbband (21,54) und ein Farbbandschutz (25, 40) befinden, wobei die Methode weiterhin den Schritt umfaßt, den Farbbandschutz an das Dokument anzudrücken, wenn dieses zwischen die Walze und den Druckkopf in den Drucker eingezogen wird; und dadurch gekennzeichnet ist, daß, bevor der Druckvorgang beginnt, der Druckkopf und der Farbbandschutz horizontal zumindest über einen Teil der Breite des Dokumentes bewegt werden, um so durch das Andrücken des Farbbandschutzes an das Dokument dieses dazu zu bringen, sich flach an die Walze anzulegen.
- Eine Methode nach Anspruch 6, die dadurch gekennzeichnet ist, das der obere Teil des Dokuments (23) vor dem Druckvorgang in Führungsrollen eingezogen wird, die über dem oberen Rand des Dokuments liegen, und dies durch das Andrücken des Farbbandschutzes an das Dokument erreicht wird, wenn er über die Breite des Dokuments bewegt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80792285A | 1985-12-11 | 1985-12-11 | |
US807922 | 1985-12-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0225498A2 EP0225498A2 (de) | 1987-06-16 |
EP0225498A3 EP0225498A3 (en) | 1989-05-24 |
EP0225498B1 true EP0225498B1 (de) | 1993-09-22 |
Family
ID=25197436
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860115605 Expired - Lifetime EP0225498B1 (de) | 1985-12-11 | 1986-11-11 | Farbbanddruckeraufbau mit integralem Farbbandschutz und Druckverfahren eines Dokumentes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0225498B1 (de) |
JP (1) | JPS62140869A (de) |
DE (1) | DE3689063T2 (de) |
ES (1) | ES2003596A6 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH037375A (ja) * | 1989-06-05 | 1991-01-14 | Fujitsu Ltd | カラーリボン用マスクの実装構造 |
JPH0460456U (de) * | 1990-10-03 | 1992-05-25 | ||
JP3371356B2 (ja) * | 1995-08-30 | 2003-01-27 | セイコーエプソン株式会社 | ドットインパクト式プリンタ用のリボンマスク |
DE19743320C1 (de) * | 1997-09-30 | 1999-03-04 | Siemens Nixdorf Inf Syst | Drucker für Aufzeichnungsträger sowie Farbbandkassette zur Verwendung in einem Drucker |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4165188A (en) * | 1977-02-17 | 1979-08-21 | Sycor, Inc. | Ribbon mask and guide for dot matrix impact printers |
US4277187A (en) * | 1979-07-27 | 1981-07-07 | Exxon Research & Engineering Co. | Ribbon locating means |
US4339211A (en) * | 1979-07-30 | 1982-07-13 | Exxon Research & Engineering Co. | Flexible leader |
US4383775A (en) * | 1981-02-09 | 1983-05-17 | Data Products Corporation | Ribbon shield |
JPS5829447U (ja) * | 1981-08-21 | 1983-02-25 | セイコーエプソン株式会社 | 印字装置 |
US4422785A (en) * | 1982-05-26 | 1983-12-27 | Sydney Shore | Ribbon cartridge construction |
US4643601A (en) * | 1984-09-28 | 1987-02-17 | International Business Machines Corporation | Ribbon positioning mechanism |
-
1986
- 1986-11-11 DE DE19863689063 patent/DE3689063T2/de not_active Expired - Fee Related
- 1986-11-11 EP EP19860115605 patent/EP0225498B1/de not_active Expired - Lifetime
- 1986-11-11 JP JP26681986A patent/JPS62140869A/ja active Granted
- 1986-12-10 ES ES8603340A patent/ES2003596A6/es not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ES2003596A6 (es) | 1988-11-01 |
EP0225498A2 (de) | 1987-06-16 |
EP0225498A3 (en) | 1989-05-24 |
JPS62140869A (ja) | 1987-06-24 |
DE3689063T2 (de) | 1994-04-21 |
DE3689063D1 (de) | 1993-10-28 |
JPH0588198B2 (de) | 1993-12-21 |
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