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    Dual feed rate ribbon mechanism and supply cartridge therefor
    3.
    发明授权
    Dual feed rate ribbon mechanism and supply cartridge therefor 失效
    双馈机器和供应盒

    公开(公告)号：US3604549A

    公开(公告)日：1971-09-14

    申请号：US3604549D

    申请日：1968-07-16

    Applicant: IBM

    Inventor： CAUDILL ALLISON H ,  GOFF WILLIE JR

    IPC: B41J32/00 ,  B41J33/36 ,  B41J33/56 ,  B41J35/36 ,  B41J33/14

    CPC classification number: B41J33/36 ,  B41J35/36

    Abstract: A ribbon feed mechanism for feeding a substantially constant linear or longitudinal amount of single pass ribbon past a printing position during each ribbon feed cycle. A cartridge, which is removably mounted on a baseplate, has a supply spool and a takeup spool rotatably mounted therein with the ends of the single pass ribbon attached thereto. The bottom wall of the cartridge has a curved slot to receive a resiliently biased drive roller, which is rotatably mounted on a pivotal arm on the baseplate and has pointed projections thereon for penetrating the inked ribbon on the takeup spool to linearly advance the ribbon past its printing position. The drive roller is rotated by a gear train during each actuation of a character key on the typewriter. Means change the gear ratio of the gear train to cause a smaller amount of rotation of the drive roller during each actuation of a character key to advance the ribbon a smaller linear amount. The cartridge has a cylindrical recess to receive a portion of the gear train. When the ribbon is a solvent coated plastic transfer matrix whereby overstriking is desired, then resiliently biased means is disposed within the recess in the cartridge to render the change means operative to reduce the amount of rotation of the drive roller. If a total release ribbon is used wherein no overstriking is desired, then the recess in the cartridge is empty and the larger amount of rotation of the drive roller occurs because the change means is not rendered operative.

    PRINTER RIBBON SUPPLY MECHANISM WITH END OF RIBBON DETECT EXPEDIENT WHICH REDUCES RIBBON DRAG
    7.
    发明专利
    PRINTER RIBBON SUPPLY MECHANISM WITH END OF RIBBON DETECT EXPEDIENT WHICH REDUCES RIBBON DRAG 未知

    公开(公告)号：CA1117889A

    公开(公告)日：1982-02-09

    申请号：CA336006

    申请日：1979-09-20

    Applicant: IBM

    Inventor： FIRTH ROWLAND V III ,  GOFF WILLIE JR

    IPC: B65H23/182 ,  B41J33/52 ,  B41J33/54 ,  B41J35/36

    Abstract: A PRINTER RIBBON SUPPLY MECHANISM WITH END OF RIBBON DETECT EXPEDIENT WHICH REDUCES RIBBON DRAG In a conventional ribbon supply spool structure which comprises a supply of ribbon wound on a hub rotatable about and axially movable with respect to a hub receiving member on which the hub is seated and which is coaxial with respect to the hub, an improved end of ribbon detection device is provided by the combination of deflectable spring means within the spool hub which exert a force when deflected having a first force component acting against but restrained by wound ribbon on the hub and a second component acting along the hub axis. A spring tensioned member exerts a force along the hub axis which opposes the component of force of the deflectable spring along the hub axis. In this manner, the deflectable spring and the spring tensioned member are maintained in static equilibrium at a selected point along said axis so long as the deflectable spring is restrained by a predetermined minimum of ribbon remaining wound on the hub. This predetermined minimum of ribbon remaining wound is indicative of the end of ribbon. In the preferred embodiment this is in effect the point where the ribbon becomes substantially unwound. AT9-78-005

    IMPACT PRINTER CARDHOLDER WITH INTEGRAL RIBBON GUIDE
    9.
    发明专利
    IMPACT PRINTER CARDHOLDER WITH INTEGRAL RIBBON GUIDE 未知

    公开(公告)号：CA1128451A

    公开(公告)日：1982-07-27

    申请号：CA336007

    申请日：1979-09-20

    Applicant: IBM

    Inventor： BEMIS JOHN D ,  GOFF WILLIE JR

    IPC: B41J11/62 ,  B41J13/10 ,  B41J13/18 ,  B41J35/00 ,  B41J35/06 ,  B41J35/36 ,  B41J35/04

    Abstract: AN IMPACT PRINTER CARDHOLDER WITH INTEGRAL RIBBON GUIDE In an impact printer with a conventional combination of platen and cardholder wherein the cardholder has an inner surface with a curvature matching that of the platen and is mounted adjacent to but spaced from the platen so that a sheet of printing medium may be moved between the cardholder and platen and wherein conventional impact printing is carried out by impact means acting upon the sheet through an opening in the cardholder, an improved cardholder structure is provided wherein the cardholder comprises integral ribbon guide means for guiding the printer ribbon in a path along the outer surface of the cardholder across the opening whereby the impact means may selectively drive the ribbon through the opening to print upon the sheet. In accordance with another aspect of the present invention, the cardholder further comprises integral end of ribbon sensing means mounted in a fixed position along said ribbon path. AT9-78-004

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