公开(公告)号：CA1204338A

公开(公告)日：1986-05-13

申请号：CA437403

申请日：1983-09-23

Applicant: IBM

Inventor： ALEXANDER DOUGLAS E ,  MCCRAY CHARLES M

IPC: B41J32/02 ,  B41J33/10 ,  B41J33/24 ,  B41J33/28 ,  B41J32/00

Abstract: PRINTER RIBBON CASSETTE AND FEED MECHANISM . An improved, disposable inexpensive feed mechanism is uniquely incorporated in a cassette having a flexible or movable wall driven by contact with a moving printer carriage or the like. Friction facing of the moving wall cooperates with a fixed friction facing on an interiorly placed portion of a cassette wall with a ribbon between the two friction faces. The friction facing of the movable part has angled fiber elements that engage the ribbon in one direction but slip easily over the ribbon in the opposite direction. The moving printer carriage or the like contacts a movable portion of the cassette wall in each pass and indexes the ribbon slightly to provide a fresh supply across a platen. The platen may be integrally molded as a part of the cassette and can be made of plastic. The entire mechanism is disposable, is contained in a single clean package and is very low cost. No rollers, feed roll drives or motors are required.

公开(公告)号：CA1212912A

公开(公告)日：1986-10-21

申请号：CA461013

申请日：1984-08-14

Applicant: IBM

Inventor： ALEXANDER DOUGLAS E ,  HOLLAND JAMES F ,  LEONARD HERBERT G ,  REED ALVIN R

IPC: F16D41/18 ,  F16D59/00 ,  F16D13/12

Abstract: BUCKLING CLUTCH A mechanical torque transmitting apparatus such as a one-way clutch which includes two distinct sets of flexural arms (primary and auxiliary) and a cylindrical engagement surface. The primary flexural arm is adapted to be in edgewise continuous engagement with the cylindrical surface. Preferably, the primary flexural arm has a long, straight, narrow cross-section area and applies a relatively low force against the cylindrical surface when said surface is rotating in a free-wheeling direction. In the non free-wheeling direction, the force against the cylindrical surface increases until the rotational forces overcome and buckle the primary flexural arm whereupon the auxiliary flexural arm is brought into contact with the cylindrical surface to resist further rotation.