公开(公告)号：DE1963987A1

公开(公告)日：1970-07-16

申请号：DE1963987

申请日：1969-12-20

Applicant: IBM

Inventor： WALTER REED DAVID

IPC: B41J1/30 ,  B41J19/04

公开(公告)号：DE1536981A1

公开(公告)日：1970-02-26

申请号：DE1536981

申请日：1967-05-13

Applicant: IBM

Inventor： WALTER REED DAVID ,  ROBERT SIMPSON VICTOR ,  DEAN ZOLNOSKY LARRY

IPC: B41J1/26

Abstract: 1,174,645. Selective printing. INTERNATIONAL BUSINESS MACHINES CORP. 1 May, 1967 [16 May, 1966], No. 19930/67. Heading B6F. Continuously rotating type-wheel machines.- Type 12 pivotally mounted on the peripheral surface of a type-wheel 11 are selectively moved out of normal inoperative path into the path of a guide 75 whereby further rotation of the typewheel causes an impression stroke. Type-wheel construction.-The type-wheel 11 comprises a hub 30, Fig. 2, a radial flange 32 with a plurality of fins 33 within each adjacent pair an individual type 12 is pivotally supported. The type 12 has a low-friction guide surface which centres the type within the fins, and a type slug 43 with a character 44. A projection 45 co-operates with the guide 75 for directing the type member 12 to print position. The type-wheel also comprises a toroidal permanent electromagnet 50 having a plurality of wedge-shaped outer polepieces 51 and corresponding polepieces 52 held together by epoxy resin 53 and secured to the hub 30 by screw 55. Type-selecting action.-The type 12 are all normally held in a non-operative path by the permanent magnets but a selected type is moved into an operative path by an electro - magnet 71-73 which opposes the force of the permanent magnet and a spring 57 moves the type 12 to one side so that guiding edges (76) of the guide 75 hold the type clear of the permanent magnets. A second guide comprising an edge 79 on metal cam 78 which engages the projection 45 on the selected type to positively direct the type to point of impact. A further cam or reset ramp 82 engages the type slug 43 on both sides of the embossed character 44 and returns the type to non-operative position. Disposition of characters.-The characters are displaced progressively around the wheel to allow for the continuous feed of the platen carriage 13. Platen carriage.-The platen carriage is positively and continuously moved transversely across the printing wheel or guide rod 107 by means of a linkage 105, 104, pivot 103 and a follower 101 oscillated by a groove 100 in a cam 99, driven by gear and worm 97, 96 from a motor driven belt drive 23, 22, 21. A one-revolution clutch may be included. Carriage-return.-This is effected by the same cam 99 that effects letter-spacing. Line - spacing.-Automatic and adjustable line-spacing is effected when the carriage-return movement causes a roller 137 to ride up a ramp 136, and via adjustable linkage 145, 138-142, pivot or gripper mechanism 119, 118, 117. Web-feed.-The web 14 is fed over the platen 93 by the gripper mechanism. A blade 115 prevents return movement, and the feed bar 117 may be used as a tear-off bar.