Printing device having printwheel coupling means

Details Printing device having printwheel coupling means Printing device having printwheel coupling means

1992-02-12

1992-12-29

Burr, Edgar S.

Typewriting machines

Including type-set-assemblage mounted on carrier and...

Type-head, per se

400175, 4001442, B41J 124

Patent

active

051746662

ABSTRACT:
A printing device having a detachable printwheel coupling means which includes a motor driven drive plate which is formed with a cantilevered spring finger and an aligning slot disposed on the side opposite the spring finger. The spring finger carries at its free end an alignment pin which automatically engages a radially offset cam surface located in a recess formed in the hub of a printwheel when the drive plate rotates relative to the printwheel. The printwheel hub also includes a drive pin which engages the aligning slot when the printwheel and drive plate abut under the urging of a pressure plate. The device inhibits angular and radial movement between the drive plate and the printwheel.

REFERENCES:
patent: 4124930 (1978-11-01), Bauer
patent: 4161373 (1979-07-01), Chvatlinsky
patent: 4512676 (1985-04-01), Johansson
patent: 4542999 (1985-09-01), Bauer et al.
patent: 4556335 (1985-12-01), Morris
patent: 4600324 (1986-07-01), Matsumori
patent: 4673305 (1987-06-01), Crystal
patent: 4820066 (1989-04-01), Link

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