Pin platen mechanism

Details Pin platen mechanism Pin platen mechanism

1987-03-23

1991-11-12

Burr, Edgar S.

Typewriting machines

Sheet or web

For feeding web record-medium

400616, B41J 1128

Patent

active

050643053

ABSTRACT:
A pin platen mechanism includes coiled springs mounted in respective retaining holes formed in a sprocket wheel for biasing respective sprocket pins to the outside at all times. A cam groove in a cam member has freely fitted therein projections of the sprocket pins. A wider part of the cam groove enables the pins to be withdrawn inwardly only when necessary.

REFERENCES:
patent: 1431266 (1922-10-01), Shreman
patent: 3410469 (1968-11-01), Deeg
patent: 4033493 (1977-07-01), Levinson
patent: 4133613 (1979-01-01), Webster
patent: 4571104 (1986-02-01), Jung et al.

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