公开(公告)号：CA1127106A

公开(公告)日：1982-07-06

申请号：CA339718

申请日：1979-11-13

Applicant: IBM

Inventor： BEMIS JOHN D ,  FIRTH ROWLAND V III ,  GOFF WILLIE JR ,  STONE RICHARD T JR

IPC: G11B23/087 ,  B41J32/00 ,  B41J33/42 ,  B41J33/56 ,  B41J35/28 ,  G11B23/28 ,  B41J33/14

Abstract: A REVERSIBLE RIBBON CARTRIDGE FOR A HIGH SPEED IMPACT PRINTER In a high speed impact printer having means for receiving a ribbon cartridge and for driving the ribbon in said cartridge, the improved apparatus comprising a ribbon cartridge to be inserted in said receiving means and adapted to be reversed one time only which comprises a cartridge housing with first and second reels rotatably mounted in said housing; each of the reels is adapted to support a portion of inventory of a ribbon web which is being driven from one reel to the other reel by the impact printer means for driving said ribbon. A keyed tenon projects from said housing and has an initial position and a second position; the keyed tenon is switchable from the initial position to the second position but irreversible from said second position. The receiving means in the printer includes means for exclusively receiving the tenon keyed in its initial position wherein the ribbon is driven from the first reel to the second reel and means for exclusively receiving the keyed tenon in its second position wherein ribbon is driven from the second reel to the first reel. AT9-78-006

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