EP0263869B1 - Support de tete d'impression - Google Patents

Support de tete d'impression Download PDF

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Publication number
EP0263869B1
EP0263869B1 EP19870902976 EP87902976A EP0263869B1 EP 0263869 B1 EP0263869 B1 EP 0263869B1 EP 19870902976 EP19870902976 EP 19870902976 EP 87902976 A EP87902976 A EP 87902976A EP 0263869 B1 EP0263869 B1 EP 0263869B1
Authority
EP
European Patent Office
Prior art keywords
print head
balls
printer
support member
recesses
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
Application number
EP19870902976
Other languages
German (de)
English (en)
Other versions
EP0263869A1 (fr
Inventor
Michael O. Grey
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.)
NCR Voyix Corp
Original Assignee
NCR Corp
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 NCR Corp filed Critical NCR Corp
Publication of EP0263869A1 publication Critical patent/EP0263869A1/fr
Application granted granted Critical
Publication of EP0263869B1 publication Critical patent/EP0263869B1/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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/10—Sound-deadening devices embodied in machines

Definitions

  • the present invention relates to a printer. More particularly, the invention is directed to a suspension mechanism for a print head carriage that travels back and forth across the printer and supports a thermal print head for printing on thermal paper which is directed in a path past a platen.
  • thermal printers In the area of thermal printers, it is well-known that the use of such printers is increasing for certain operations that require a reduction in noise levels and at a reasonable cost. While development work is continually progressing to increase the speed of operation with minimum maintenance or care of the equipment, it is seen that improvements are being made to provide a higher quality print with a reduced number of thermal elements.
  • thermal print head having a plurality of thermal printing elements on the surface of the head and wherein selected elements are energized to provide printing on thermal paper or like record media with the print head operating in a stationary or fixed position relative to the printer frame.
  • the thermal print elements on the print head may take the form of pads or contact surfaces in the shape of characters and connected by conducting runs to side or edge connectors.
  • a flexible flat ribbon-like cable is normally used to connect the power and/or control circuitry with the pads or contact surfaces on the print head and the individual leads or wires of the cable may include end connectors or terminals for contact with the print head pads.
  • shuttling-type print head having approximately 20% of the number of print elements as compared to the number of elements on a fixed or stationary head.
  • a problem encountered with the shuttling print head is that of smudging the thermal paper on which the printed image is formed by reason of pressure or contact between the print head and the paper or between the print head and the platen during travel of the print head across the printer. Since it is common practice to print in one direction of travel of the print head, this problem can be alleviated by reducing the pressure of the print head against the thermal paper and against the platen during the return cycle of the print head and its carriage.
  • a printer including a movable printer mechanism, a support member for carrying said printing mechanism and having a plurality of recesses therein, a frame portion adjacent said support member and having a plurality of recesses therein at locations in opposed relationship to the recesses in said support member, and a plurality of balls of resilient material each of which is positioned in a respective pair of recesses for providing a space between said support member and said frame portion, characterized in that each recess has a conically shaped surface, and each ball is secured to the respective conically shaped surfaces by means of an adhesive.
  • Fig. 1 shows a portion of a thermal printer 10 that includes a platen 12 suitably supported from the printer frame.
  • a thermal print head 14 of well-known design and structure is supported from and carried by a print head carriage 16 that is caused to be shuttled or moved in reciprocating manner by appropriate mechanism in the direction of viewing by the observer in Fig. 1.
  • the carriage 16 is pivotally supported on a shaft 18 journalled in the frame of the printer and such carriage includes an upstanding plate portion 20 and a generally horizontal plate portion 22 with gusset means 24 bridging the two portions at appropriate locations.
  • a plate-like cam 30 of circular configuration is positioned to be rotatably driven by drive means 32 coupled to the shaft 34 of a motor 36.
  • the plate cam 30 having a groove of varying depth is suitably supported by bearing means 38 which, in turn, is supported by a carriage drive plate 40.
  • the horizontal plate portion 22 of the print head carriage 16 includes cam follower mechanism 42 having a portion riding on the bottom surface of the groove and operative to pivot the carriage 16 about the shaft 18 thereby to move the print head 14 towards and away from the platen 12.
  • a ribbon cassette 50 is provided and is supported on the frame 52 of the printer.
  • a ribbon 54 is provided in coiled form within the cassette and is trained in a path between the print head 14 and record media, such as paper 56, such paper being caused to be transported by suitable drive means including a drive roller 58.
  • the ribbon 54 and the paper 56 are driven in well-known incremental manner past the print station in the printing cycle of operation.
  • Fig. 2 shows the carriage drive plate 40 and Fig. 3 is an enlarged view of the mechanism supporting such drive plate in suspended manner.
  • the means for suspending and supporting the plate 40 is accomplished by a plurality of resilient members 60, specifically shown as being four balls made of soft urethane or rubber.
  • the four balls 60 are placed at appropriate points, as illustrated at 70 (Fig. 2), between a frame portion 62 and the carriage drive plate 40 for providing an evenly spaced suspension system for the print head carriage 16 and its associated mechanism and for isolating the print head carriage from the printer frame.
  • the carriage drive plate 40 is provided with four cone-shaped cutouts, as at 64, and the frame portion 62 is provided with like cutouts 66 corresponding with and opposed to the cutouts 64.
  • Adhesive 68 is applied to the surface of each of the cutouts 64 and 66, and/or the surface of the balls 60, in order to contain and secure the parts together.

Abstract

Une bille élastique (60) en uréthane ou en caoutchouc est utilisée dans chacune d'une pluralité de parties creuses coniques (64, 66) formées dans la plaque d'entraînement (40) d'un chariot (16) à tête d'impression thermique, et également formées dans le bâti (62) de l'imprimante. On applique un adhésif (68) sur les surfaces des parties creuses coniques (64, 66), et on place ensuite les billes élastiques (60) à l'intérieur desdites parties creuses, ces billes élastiques (60) étant dimensionnées de manière à ménager un espace entre la plaque d'entraînement (40) et le bâti (62). Les billes élastiques (60) constituent un moyen de suspension pour le chariot (16) de la tête d'impression et isolent celui-ci du bâti de l'imprimante pour pratiquement éliminer les problèmes de vibrations.

Claims (4)

1. Imprimante comprenant un mécanisme mobile d'impression, un élément (40) de support destiné à porter ledit mécanisme (16) d'impression et présentant plusieurs évidements (64), une partie de bâti (62) adjacente audit élément (40) de support et présentant plusieurs évidements (66) en des emplacements opposés aux évidements (64) dudit élément (40) de support, et plusieurs billes (60) en matière élastique, disposées chacune dans une paire respective d'évidements (64, 66) pour établir un espace entre ledit élément (40) de support et ladite partie de bâti (62), caractérisée en ce que chaque évidement (64, 66) présente une surface de forme conique, et chaque bille (60) est fixée aux surfaces respectives de forme conique au moyen d'un adhésif (68).
2. Imprimante selon la revendication 1, caractérisée en ce que ledit élément (40) de support et ladite partie de bâti (62) sont des plaques maintenues sensiblement parallèlement l'une à l'autre.
3. Imprimante selon la revendication 2, caractérisée en ce que lesdites billes (60) comprennent quatre billes dont chacune d'elles est espacée de façon sensiblement égale des deux billes qui en sont les plus proches.
4. Imprimante selon la revendication 1, caractérisée en ce que les billes (60) sont en matière du type uréthanne.
EP19870902976 1986-04-07 1987-03-30 Support de tete d'impression Expired EP0263869B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84908886A 1986-04-07 1986-04-07
US849088 1986-04-07

Publications (2)

Publication Number Publication Date
EP0263869A1 EP0263869A1 (fr) 1988-04-20
EP0263869B1 true EP0263869B1 (fr) 1990-08-22

Family

ID=25305035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870902976 Expired EP0263869B1 (fr) 1986-04-07 1987-03-30 Support de tete d'impression

Country Status (3)

Country Link
EP (1) EP0263869B1 (fr)
JP (1) JPS63503051A (fr)
WO (1) WO1987006191A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1333982B1 (fr) * 2000-10-23 2011-03-09 Hewlett-Packard Industrial Printing Ltd. Appareil et procede de protection de tetes d'impression

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR849225A (fr) * 1938-01-24 1939-11-16 Support amortissant les chocs et les bruits pour machines à écrire
US2571281A (en) * 1947-09-13 1951-10-16 Gen Tire & Rubber Co Resilient mounting
US2613898A (en) * 1949-02-17 1952-10-14 Clark H Williams Cushion support for typewriters
CH320467A (de) * 1954-05-29 1957-03-31 Contraves Ag Stossdämpfende Verbindung zwischen mechanischen Flachteilen

Also Published As

Publication number Publication date
JPS63503051A (ja) 1988-11-10
WO1987006191A1 (fr) 1987-10-22
EP0263869A1 (fr) 1988-04-20

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