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WO1983003798A1 - Cassette a ruban - Google Patents

Cassette a ruban Download PDF

Info

Publication number
WO1983003798A1
WO1983003798A1 PCT/US1983/000613 US8300613W WO8303798A1 WO 1983003798 A1 WO1983003798 A1 WO 1983003798A1 US 8300613 W US8300613 W US 8300613W WO 8303798 A1 WO8303798 A1 WO 8303798A1
Authority
WO
WIPO (PCT)
Prior art keywords
ribbon
ink
roll
supply roll
enclosure
Prior art date
Application number
PCT/US1983/000613
Other languages
English (en)
Inventor
Bernard Patrick Sheehan
Volker Werwick
Original Assignee
Ncr Corporation
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 Corporation filed Critical Ncr Corporation
Priority to DE8383901866T priority Critical patent/DE3364675D1/de
Priority to DE1983901866 priority patent/DE107719T1/de
Priority to JP50194183A priority patent/JPS59500709A/ja
Publication of WO1983003798A1 publication Critical patent/WO1983003798A1/fr

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
    • B41J31/00—Ink ribbons; Renovating or testing ink ribbons
    • B41J31/14—Renovating or testing ink ribbons
    • B41J31/16—Renovating or testing ink ribbons while fitted in the machine using the ink ribbons
    • 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
    • B41J32/00—Ink-ribbon cartridges
    • B41J32/02—Ink-ribbon cartridges for endless ribbons

Definitions

  • the invention relates to a ribbon cassette, and, in particular, to a self-regulating re-inking mechanism included therein.
  • a ribbon cassette carrying an endless ribbon which is caused to be driven past a printing station, and wherein the printing ribbon is either a pre- inked and disposable ribbon or a ribbon which is to be continuously or frequently re-inked during the printing operation.
  • the ribbon cassette itself may be of the stuffing-box type wherein the ribbon is contained within the cassette in random manner and such ribbon is unfolded at the cassette exit and caused to be driven past the printing station and then guided back into the cassette to be folded again in random manner therein.
  • a ribbon may be utilized in a mobius loop configuration within the cassette wherein the ribbon is in substantially continuous contact with an inking core or like member, or the ribbon may have a plurality of coils thereof around a central core for controlled inking or re-inking of the ribbon.
  • European Patent Application No. 0,019,649 ' discloses a ribbon cassette containing an endless ribbon and having two ink supply rollers for re-inking purposes. Each supply roller has an associated ink transfer roller pivotally mounted on a lever and urged by a spring into frictional contact with the respective ink supply roller. The ink transfer rollers serve as guides for the ribbon and transfer ink to the ribbon as it is advanced in con ⁇ tact therewith.
  • a disadvantage of this arrangement is that the amount of ink transferred to the ribbon is independent of the actual ink requirement thereof, since
  • the spring loading provides a substantially constant pressure of the ink transfer rollers on the ink supply rollers and, accordingly, a substantially uniform ink transfer to the ribbon.
  • a ribbon cassette including an enclosure, an endless ribbon contained in said enclosure, driving means for moving the ribbon into and out of said en- closure for use in printing operations, an ink supply roll rotatably supported at a fixed location within said enclosure, and an ink transfer roll pivotally mounted within said enclosure for rotational contact with said ink supply roll for transferring ink from said ink supply roll to said ribbon, characterized in that said ink transfer roll is arranged to be moved by the ribbon
  • Fig. 1 is a plan view of a portion of a ribbon cassette according to the invention illustrating a ribbon re-inking mechanism
  • Fig. 2 is a top plan view of the body of a ribbon cassette having the cover removed to show the interior structure
  • Fig. 3 is a front elevational view taken along the line 3-3 of Fig. 2;
  • Fig. 4 is a side elevational view taken along the line 4-4 of Fig. 2;
  • Fig. 5 is an enlarged elevational view of a portion of the re-inking mechanism shown in Fig. 2;
  • Fig. 6 is a top plan view of the cover of the cassette shown in Fig. 2;
  • Fig. 7 is a side elevational view taken along the line 7-7 of Fig. 6;
  • Fig. 8 is a plan view of the underside of the cassette cover shown in Fig. 6;
  • Fig. 9 is a side elevational view taken along the line 9-9 of Fig. 8.
  • Fig. 1 shows a portion of a ribbon cassette 10 providing space for a re-inking mechanism which includes
  • a porous rubber inking roll 12 journaled on a fixed- position shaft or spindle 32.
  • a transfer roll 18 is rotatably mounted on and carried by a carriage 36 which is journaled on a pivot or spindle 38 and which roll 18 is normally in surface contact with the inking roll 12.
  • a single guidepost 40 is provided upstream of the trans ⁇ fer roll 18 to cause the ribbon 20 to travel along a path just short of halfway around the periphery of the transfer roll 18. The pivoting of the transfer roll 18 relative to and into pressure contact with the inking roll 12 utilizes the ribbon 20 itself to maintain such contact.
  • the ribbon tension increases by reason of the drying condition, which increased tension, in turn, causes the ribbon 20 to urge the transfer roll 18 against the inking roll 12 with a greater force and thereby cause more or faster transfer of ink from the inking roll 12 to the transfer roll 18.
  • the ribbon tension decreases by reason of the ink wetting condition thereof and relieves the urging of the transfer roll 18 against the inking roll 12 in a manner which regulates the amount of ink that is transferred from the inking roll 12 to the transfer roll 18.
  • the result is less re-iriking in the case of a saturated ribbon condition and more re—inking as the ink is depleted from the rib ⁇ bon 20.
  • the re-inking mechanism provides for self-regulation and control of the amount of ink which is transferred from the'inking roll 12 to the transfer roll 18 so as to maintain a properly inked ribbon 20.
  • OMH Fig. 2 is a top plan view of the body of a ribbon cassette having the cover removed therefrom to show the interior structure and the various components thereof in a preferred arrangement of the subject matter of the present invention.
  • cassette body 50 is preferably of molded plastic material and takes the shape of a generally rectangular flat case for support ⁇ ing the ribbon thereof and which is adapted to fit adjacent or along the printing station of a printer.
  • the cassette body 50 includes, a large cavity or chamber 52 formed in part by an outer wall starting at the right side of the cassette and having a wall portion 54 curving toward the rear of the cassette, a wall portion 56 running along the rear of the cassette, and a wall portion 58 curving toward the front of the cassette near the left side thereof.
  • a generally centrally-located wall 60 extends for a distance through the cassette body 50 and a slanted or inclined wall 62 is connected with and is directed from one end of the wall 60 at an angle downwardly and toward the front of the body of the cassette.
  • the wall 62 continues to form a wall portion 64 along the front of the cassette body and toward the right side thereof.
  • a short wall portion 66 and another wall portion 68 are located between the wall portion 64 and the start of the wall portion 54.
  • a plurality of latch members or lugs 70 are formed as an integral part of the cassette body and are positioned generally at the four corners thereof for connection and attachment to mating receptacles in the cover of the cassette.
  • a front guide or locating finger 72 is provided as an integral part of the cassette body 50 for aid in connecting the cassette cover with such body. It is understood, of course, that the cassette includes the body 50 with the cover (later described) connected to form the enclosure for the ribbon.
  • the internal components of the body 50 of the cassette include a pair of rollers 80 and 82 which are
  • the roller 82 is preferably the drive roller and is con ⁇ nected to a drive member (not shown) while the idler roller 80 is maintained in a biased position against • such roller 82 by means of a spring 88 wrapped around a stud or pin 90 and having one end thereof engageable against one end of a support arm 92 pivoted on a spin ⁇ dle or a shaft 94.
  • the support arm 92 may include a plurality of stripper bearings which are positioned to mate with and extend between the several ribbon driving portions of the idler roller 80.
  • a ribbon re-iriking mechanism is provided and supported within the cassette body 50 adjacent the ribbon 84 exit at the right side thereof.
  • a porous- rubber inking roll 100 is rotatably carried or journaled on a hub 101 supported from a spindle 102 positioned in a cavity or chamber 104 formed by the walls 60, 62 and 64.
  • An ink transfer roll 110 preferably of plastic material is supported from and carried on a carriage 112 at the right of inking roll 100.
  • the carriage 112 includes a spindle 114 at one end thereof for rotatably carrying the transfer roll 110 and includes a hub 116 at the other end thereof seated on a pivot pin or spindle 118.
  • a roller or like bearing 119 is positioned and journaled on a spindle 120 adjacent the wall portion 54.
  • the carriage 112 with the ink transfer roll 110 thereon is journaled or pivoted on the spindle 118 to enable the transfer roll to surface engage with the inking roll 100 in increasing or decreasing pressure conditions.
  • the ribbon 84 is contained within the cavity . or chamber 52 in a random or stuffing manner and is caused to be pulled across a lower ridge or dam 115 and then directed by a wall portion 122 formed as an end of the wall 60 to take a path around the bearing 119. From such bearing 119, the ribbon 84 is directed around a guidepost 124 and then around the transfer roll 110 with sufficient tension therein to cause rotation of the transfer roll along with rotation of the inking roll 100.
  • the spindle 114 provides a loose fit for ease of rotation of the transfer roll 110.
  • the ribbon 84 is directed past the exit of the cassette body 50 and along the printing station (not shown) and then is positioned between the rollers 80 and 82 to be driven thereby and back into the storage chamber 52.
  • the path of the ribbon is shown along with an indication of the direc ⁇ tion of rotation of the several rollers by means of appropriate arrows in Fig. 2.
  • Figs. 3 and 4 show elevational views of the body 50 of the cassette wherein the front view (Fig. 3) illustrates a two-degree angle of the ribbon path with respect to the line of printing for the purpose of making better use of the ribbon width.
  • the cassette body 50 is formed to provide the entire ribbon path, including that portion of the ribbon 84 in the storage chamber or cavity 52 as well as the portion past the printing station, in a plane at two degrees from the line of printing, all as more specifically described in U.S. Patent No. 4,209,261.
  • the side view in Fig. 4 also shows the latch members or lugs 70 along with the spin- dies or hubs for the several rollers.
  • Fig. 5 is an enlarged elevational view of a portion of the re-inking mechanism shown in Fig. 2 and better illustrates the carriage 112 which has the up ⁇ standing hub 116 journaled on the pivot pin 118, the latter shown as being an integral part of the cassette body 50.
  • the ink transfer roll 110 is freely journaled on the spindle 114 at the other end of the carriage 112 and is caused to be moved in a rockable manner toward and away from the ink roll 100 (Fig. 2) around the pivot pin 118.
  • the extent of the rockable motion is relatively small as required by the amount of ink on the exterior periphery of the ink transfer roll 110 for re-inking the ribbon 84 and as determined by the tension in the ribbon 84 for providing the torque for rotating the transfer roll 110 and also the inking roll 100.
  • Fig. 6 illustrates the top plan of a cover 130 for the cassette which fits onto the cassette body 50, shown in Fig. 2.
  • the cover 130 has a ribbed portion 132 covering approximately the upper half of the cover and which portion generally matches the outline of the body 50.
  • the ribbed portion 132 provides a design to present a pleasing appearance across the top of the cover 130 relative to the two-degree angle of the configuration of the cassette and of the path taken by the ribbon 84.
  • the front portion 134 of the cover is generally plain and provides space for and covers the printing mechanism which may take the form of print wire solenoids, as more fully described in U.S. Patent No. 4,209,261.
  • the front portion 134 also includes a tear-off edge 136, and several receptacles 138 are provided in the cover 130 for receiving the lugs 70 (Fig. 2).
  • a recess 140 is provided in the cover 130 for accommodating the ribbon idler roller 80 while a further recess 142 in the cover accommodates the porous inking roll 100.
  • the cassette includes the body 50 (Fig. 2) with the cover 130 (Fig. 6) fitting thereon to form the enclosure for the ribbon 84.
  • FIG. 7 illustrates the shape of the cassette cover 130 as viewed in the direction from the right side of Fig. 6.
  • the ribbed portion 132 covers the cassette body 50 and the plain portion 134 extends beyond the body to cover generally the printing mechanism (not shown) with which the ribbon cassette is associated.
  • Fig. 8 shows the underside of the cassette cover 130 in an orientation opposite from the top plan view thereof in Fig. 6.
  • the underside of the ribbed portion 132 of the cover 130 also shows the location of an upper ridge or dam 144 for association with the body 50 carried lower ridge or dam 115, of the inking roll recess 142 and of the idler roll recess 140 along with the receptacles 138 for receiving the lugs 70 on the cassette body 50.
  • the frontal portion 134 and the tear-off edge 136 are also shown in the elevational view in Fig. 9 which is viewed from the right side of Fig. 8.
  • the ribbon 84 which is preferably one-quarter inch wide and formed in a loop approximately eighteen feet long, is loaded or stuffed into the cavity 52 but with a portion of the loop ex ⁇ tending in the path around the roller 119 and around the ink transfer roll 110, along the printing station or • line of printing generally in the vicinity of the tear- off edge 136, and then between the idler and drive rollers 80 and 82, which preferably drive the ribbon in continuous manner, and back into the chamber 52.
  • the ink in the ribbon is being used or consumed in such operation.
  • the ribbon is less saturated, or may become dry in a relative sense, and the frictional force between the less saturated ribbon and the ink transfer roll 110 increases along with a corresponding increase in ribbon tension resulting from the pull of the idler and drive rollers 80 and 82 and the increased frictional force.
  • the increased ribbon tension causes the ribbon 84 to increase the pressure on or against the ink transfer roll 110 and to push or ease such roll in rockable manner against and in surface contact with the inking roll 100 with a greater force to effect an increased transfer of ink to the transfer roll and therefrom to the ribbon.
  • the ribbon tension decreases in relative terms by reason of the ink satur ⁇ ated or wet condition since, in effect, such ribbon does not have as much frictional force in rotating the ink transfer roll 110.
  • the effect of decreased ribbon tension and decreased frictional force reduces the amount or rate of ink transfer from the inking roll 100 to the transfer roll 110 by reason of the transfer roll 110 rocking or easing away from the inking roll 100. It is seen that a lesser amount of ink is transferred or lesser re-inking is necessary when the ribbon is rela ⁇ tively saturated and that a greater amount of ink is transferred or more re-inking is required when ink be ⁇ comes depleted from the ribbon or when the ribbon is relatively less saturated. In this manner of operation, the re-inking process is self-regulating and, in effect, automatically re-inks the ribbon, dependent upon the ink saturated condition thereof.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)

Abstract

Une cassette à ruban comprend une enceinte (50), un ruban sans fin (84) contenu dans l'enceinte (50), et des organes d'entraînement (81, 82) pour l'avance du ruban (84) à l'intérieur et à l'extérieur de l'enceinte (50) pour une utilisation dans des opérations d'impression. L'enceinte contient un mécanisme de réencrage du ruban comprenant un rouleau poreux d'alimentation en encre (100) supporté de manière rotative à un emplacement fixe, et un rouleau de transfert d'encre (110) monté de manière pivotante de manière à rentrer en contact rotatif avec le rouleau d'alimentation en encre (100) pour le transfert d'encre du rouleau au ruban, le ruban (84) appliquant la force nécessaire à solliciter le rouleau de transfert d'encre (110) en contact avec le rouleau d'alimentation en encre (100). Le mécanisme de réencrage est auto-réglable puisqu'une augmentation de la tension du ruban (84) indiquant son appauvrissement en encre provoque un accroissement de la pression sur le rouleau d'alimentation en encre (100) pour accroître le transfert d'encre au ruban (84), et une diminution dans le ruban (84) indiquant une condition de saturation d'encre dans le ruban (84) provoque une diminution de la pression sur le rouleau d'alimentation en encre (100) pour limiter le transfert d'encre au ruban (84).
PCT/US1983/000613 1982-05-04 1983-04-26 Cassette a ruban WO1983003798A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8383901866T DE3364675D1 (en) 1982-05-04 1983-04-26 Ribbon cassette
DE1983901866 DE107719T1 (de) 1982-05-04 1983-04-26 Farbbandkassette.
JP50194183A JPS59500709A (ja) 1983-04-26 1983-04-26 リボン・カセツト

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US37482382A 1982-05-04 1982-05-04
US374,823 1982-05-04

Publications (1)

Publication Number Publication Date
WO1983003798A1 true WO1983003798A1 (fr) 1983-11-10

Family

ID=23478327

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1983/000613 WO1983003798A1 (fr) 1982-05-04 1983-04-26 Cassette a ruban

Country Status (4)

Country Link
EP (1) EP0107719B1 (fr)
CA (1) CA1203431A (fr)
DE (1) DE3364675D1 (fr)
WO (1) WO1983003798A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5487615A (en) * 1994-10-28 1996-01-30 Sercomp Corporation Ribbon drive assembly for ribbon cartridge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269422A1 (fr) * 1974-04-30 1975-11-28 Ncr Co
US4091914A (en) * 1977-02-22 1978-05-30 Porelon, Inc. Wear-activated ribbon reinker
EP0031854A1 (fr) * 1979-12-27 1981-07-15 Mannesmann Kienzle GmbH Cartouche pour ruban encreur avec dispositif de réencrage et procédé pour sa fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2269422A1 (fr) * 1974-04-30 1975-11-28 Ncr Co
US4091914A (en) * 1977-02-22 1978-05-30 Porelon, Inc. Wear-activated ribbon reinker
EP0031854A1 (fr) * 1979-12-27 1981-07-15 Mannesmann Kienzle GmbH Cartouche pour ruban encreur avec dispositif de réencrage et procédé pour sa fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5487615A (en) * 1994-10-28 1996-01-30 Sercomp Corporation Ribbon drive assembly for ribbon cartridge

Also Published As

Publication number Publication date
DE3364675D1 (en) 1986-08-28
EP0107719A1 (fr) 1984-05-09
CA1203431A (fr) 1986-04-22
EP0107719B1 (fr) 1986-07-23

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