EP0212401B1 - Farbbandkassette mit mehreren Schreibspuren - Google Patents

Farbbandkassette mit mehreren Schreibspuren Download PDF

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Publication number
EP0212401B1
EP0212401B1 EP86110704A EP86110704A EP0212401B1 EP 0212401 B1 EP0212401 B1 EP 0212401B1 EP 86110704 A EP86110704 A EP 86110704A EP 86110704 A EP86110704 A EP 86110704A EP 0212401 B1 EP0212401 B1 EP 0212401B1
Authority
EP
European Patent Office
Prior art keywords
guide
ribbon
edges
housing
ink ribbon
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
Application number
EP86110704A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0212401A3 (en
EP0212401A2 (de
Inventor
Manfred Dirla
Markus Trabelsi
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.)
TURBON INTERNATIONAL GMBH
Original Assignee
Turbon International AG
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 Turbon International AG filed Critical Turbon International AG
Publication of EP0212401A2 publication Critical patent/EP0212401A2/de
Publication of EP0212401A3 publication Critical patent/EP0212401A3/de
Application granted granted Critical
Publication of EP0212401B1 publication Critical patent/EP0212401B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41J35/00—Other apparatus or arrangements associated with, or incorporated in, ink-ribbon mechanisms
    • B41J35/04—Ink-ribbon guides
    • B41J35/10—Vibrator mechanisms; Driving gear therefor
    • B41J35/12—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift
    • B41J35/14—Vibrator mechanisms; Driving gear therefor adjustable, e.g. for case shift for multicolour work; for ensuring maximum life of ink ribbon; for rendering ink-ribbon inoperative
    • 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

Definitions

  • the invention relates to an ink ribbon cassette for writing and / or printing machines, consisting of a housing with a housing base and two housing side arms, an ink ribbon, an unwinder spool, a winding spool and drive means controllable by the machine for further transport of the ink ribbon, the ink ribbon between the two housing side arms runs freely outside the housing, and the housing side arms have guide webs in a plane running parallel to the band plane of the free band section with guide edges pointing away from one another, on which the ink ribbon is guided vertically by means of guide pieces for selecting one of several writing tracks in the band plane of the free band section Movable to the longitudinal axis of the tape is guided such that there is a compensation of different tensions of the tape edges in the different positions of the free tape section.
  • the ribbon is guided freely past the type attachment point over a section between two side arms in front of the roller of the machine.
  • the belt By guiding the belt in its transverse direction, i.e. by moving the tape in parallel, one of several writing tracks on the tape can be selected.
  • the tension of the tape is not constant, but changes depending on the selected track in such a way that the two tape edges have different tensions, particularly in the positions of the bottom and top writing tracks. This can lead to a deterioration in the quality of the font or, in the worst case, even to the tape sticking to the types, especially when using machines with type wheels, which can result in damage to the tape or the type wheel.
  • a ribbon cassette is already known (EP-A-0 118 238) in which this disadvantage is to be avoided by the housing side arms being turned outwards, i.e. have guide webs directed away from one another for the guide pieces.
  • the guide pieces are provided with U-shaped slots which are placed on the guide webs. it is provided that the guide webs have a convex profiled edge so that the guide pieces move on a circular path.
  • the distances between the edge zones of the tape guides are not constant, but are variable as a function of the selected writing track.
  • a very precise calculation of the circular arc i.e.
  • the convex curvature of the guide web edges is necessary, since this type of guide is a forced guide. Thus, with an incorrectly selected curvature, it is still possible for the band edges to have different tensions. Furthermore, due to the guidance of the guide pieces along the outwardly convexly curved guide edges, the distance of the guide pieces is not constant, i.e. their distance is greater in the position of the middle trace than in the positions of the upper and lower trace. Since the ink ribbon is moved from the lower starting position to the position of the chosen writing track each time the machine stops, the ink ribbon is pulled off the tape roll by this difference by increasing the distance between the guide pieces when moving into the middle and lower writing track than it corresponds to the transport step of the drive wheel of the machine. However, this results in a lower yield of the ribbon.
  • the invention is therefore based on the object of improving the ribbon cassette described in such a way that a completely uniform and optimal ribbon tension is achieved in all positions of the ribbon with optimal ribbon utilization with a ribbon guide that is simple to manufacture.
  • this is achieved in that the guide edges of the guide webs are arranged over their entire length perpendicular to the longitudinal axis of the tape, and in that the guide pieces are mounted on the guide edges in such a way that they can be tilted about axes perpendicular to the plane of the free tape section and intersecting with the guide edges are. Consequently, there is no positive guidance of the guide pieces as in the known ribbon cassette, but it is essential to the invention that the tape itself regulates the necessary compensation by enabling the guide pieces to be tilted due to its different tape tensions on its edges. As a result, the tension is equal across the entire bandwidth in all positions of the belt, i.e. always optimal in the position of each selected writing track.
  • the guide edges advantageously run in a straight line and parallel to one another, so that the distance between the guide pieces is constant over their path along the guide edges.
  • the tape withdrawal from the supply roll is constant in all tape positions, i.e. regardless of the selected writing track, which results in optimal tape yield.
  • a lower part 1 of the housing is one Parbband cassette according to the invention shown.
  • the cassette housing consists of a housing base 3, in which the reels with the wound tape 2 are accommodated, and of two housing side arms 4, which extend from the housing base 3 to the front, that is to say when the cassette is inserted into the machine in the direction of the stop roller, extend.
  • the ribbon 2 runs freely between the housing side arms 4 outside the housing between the stop roller and the writing types of the machine.
  • the ink ribbon 2 is movably guided to select one of several writing tracks perpendicular to the longitudinal axis 5 of the ribbon (FIG. 6) and in the plane of the free ribbon section, ie perpendicular to the plane of the drawing in FIG. 1.
  • the housing side arms 4 have guide webs 6 in a plane running parallel to the band plane of the free band section with outwards, i.e. leading edges 7 pointing away from each other.
  • Guide pieces 9 are slidably mounted on these guide edges 7 and have two contact edges 11 for guiding the ink ribbon.
  • the band 2 is guided over the contact edges 11 in such a way that it is simultaneously deflected from the direction of the side arms 4 in the direction of the free band section.
  • the guide pieces 9 In order to reliably guide the ink ribbon 2 in its transverse direction, the guide pieces 9 have extensions 12 in the side regions of the support edges 11, which grip the ribbon 2 laterally and thus prevent the ribbon 2 from slipping off the support edges 11.
  • the guide pieces 9 are held in a certain position by means of rod-shaped wire springs 13, which extend longitudinally through the housing side arms 4, preferably in the position in which the uppermost writing trace of the ink ribbon 2 runs in front of the type attachment point of the machine.
  • the prestressing of the springs 13 required for this is achieved by supports 14 which are formed in the lower housing part 1. Against the bias of the springs 13, the movement of the tape 2 is carried out by a control of the machine in order to select further writing tracks.
  • the ribbon 2 can be moved in the free ribbon section between the housing side arms 4 in the direction of the ribbon plane and perpendicular to the ribbon longitudinal axis 5 - see FIG. 6 - but the spools in the housing base 3 do not change their position, the tensions of the ribbon edges 2a and 2b not constant, so that in the band position shown in FIG. 6 the edge 2a would have a higher tension than the edge 2b.
  • the guide edges 7 of the guide webs 6 are arranged perpendicular to the longitudinal axis 5 of the belt over their entire length, that is to say run straight.
  • the guide pieces 9 are advantageously mounted on the guide edges 7 in such a way that they can be tilted about axes 15 (FIG. 1) arranged perpendicular to the plane of the free band section and intersecting with the guide edges 7, as indicated by the double arrows 16 shown in FIG. 3 should.
  • the guide pieces 9 have guide grooves 16 for resting on the guide edges 7, in each of which a cam 19 producing the tiltability of the guide pieces 9 is arranged in the center.
  • each housing side arm 4 advantageously has a further guide web 21, which is arranged parallel to the first guide web 6 in a jib between the free band section and the housing base 3.
  • These second guide webs 21 have straight guide edges 22 which are arranged parallel to the guide edges 7 of the first guide webs 6.
  • the guide pieces 9 advantageously rest on the second guide edges 22 with additional cams 23. This advantageous embodiment prevents the guide pieces 9 from tilting in a direction other than the permitted direction described, and thus ensures reliable guidance of the ink ribbon 2.
  • FIG. 2 shows the tilting position of the guide pieces 9 in the lower position of the tape for the selection of the upper writing track, in FIG. 3 the middle position and in FIG. 4 the selection position of the lower writing track. From this it can be seen that the ink ribbon 2 itself can adjust the tilting position of the guide pieces 9 due to different tensions on its edges, so that the optimum ribbon tension constancy is always obtained over the entire bandwidth.
  • the distance between the guide pieces 9, i. the center area of the contact edges 11, constant from each other. Only the distance between the edge regions of the contact edges 11 of the two guide pieces is variable from one another due to the tiltability of the guide pieces 9.
  • the present invention thus compensates for different tensioning of the tape edges while at the same time optimally utilizing the tape.

Landscapes

  • Impression-Transfer Materials And Handling Thereof (AREA)
EP86110704A 1985-08-20 1986-08-02 Farbbandkassette mit mehreren Schreibspuren Expired - Lifetime EP0212401B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3529750 1985-08-20
DE19853529750 DE3529750A1 (de) 1985-08-20 1985-08-20 Farbbandkassette mit mehreren schreibspuren

Publications (3)

Publication Number Publication Date
EP0212401A2 EP0212401A2 (de) 1987-03-04
EP0212401A3 EP0212401A3 (en) 1987-08-19
EP0212401B1 true EP0212401B1 (de) 1990-01-10

Family

ID=6278921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86110704A Expired - Lifetime EP0212401B1 (de) 1985-08-20 1986-08-02 Farbbandkassette mit mehreren Schreibspuren

Country Status (5)

Country Link
US (1) US4729677A (enrdf_load_html_response)
EP (1) EP0212401B1 (enrdf_load_html_response)
JP (1) JPS6290281A (enrdf_load_html_response)
CA (1) CA1278268C (enrdf_load_html_response)
DE (1) DE3529750A1 (enrdf_load_html_response)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4776714A (en) * 1986-07-15 1988-10-11 Monarch Marking Systems, Inc. Ink ribbon cassette with movable guide rolls
IT1195159B (it) * 1986-09-11 1988-10-12 Olivetti & Co Spa Cartuccia per un nastro di scrittura per macchine scriventi
DE8700067U1 (de) * 1987-01-02 1987-02-12 Regentrop & Bernard GmbH, 5600 Wuppertal Farbbandkassette mit schwenkbeweglichen Bandführungsarmen
US4927278A (en) * 1987-12-29 1990-05-22 Brother Kogyo Kabushiki Kaisha Tape cassette and tape printer for use therewith
US5026181A (en) * 1988-10-26 1991-06-25 Samsung Electronics Co., Ltd. Ribbon cartridge for an electronic typewriter
US5286122A (en) * 1993-05-25 1994-02-15 Datasouth Computer Corporation Ribbon cartridge with take-up arm

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3110952C2 (de) * 1981-03-20 1983-10-13 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Vorichtung zum Führen eines Farbbandes in Schreib- oder ähnlichen Maschinen
IT1158826B (it) * 1983-03-07 1987-02-25 Olivetti & Co Spa Cartuccia nastro per macchine stampanti
SE442183B (sv) * 1983-03-07 1985-12-09 Ericsson Telefon Ab L M Brytorgan for fergband vid skrivmaskiner och dylikt
JPS59194883A (ja) * 1983-04-20 1984-11-05 Ricoh Co Ltd リボンスキユ−防止用ガイドロ−ラ

Also Published As

Publication number Publication date
EP0212401A3 (en) 1987-08-19
DE3529750A1 (de) 1987-02-26
CA1278268C (en) 1990-12-27
JPS6290281A (ja) 1987-04-24
EP0212401A2 (de) 1987-03-04
DE3529750C2 (enrdf_load_html_response) 1991-07-04
US4729677A (en) 1988-03-08

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