Platen knob

Details Platen knob Platen knob

1992-07-17

1994-02-15

Wiecking, David A.

Typewriting machines

Platen or platen-moving mechanism

Cylindrical platen

4006613, B41J 1104

Patent

active

052861244

ABSTRACT:
A platen knob includes a first hollow cylinder having one bottom wall, a second hollow cylinder extending from the interior surface of the bottom wall coaxially with the first cylinder. The second cylinder is fitted on a shaft of a cylindrical platen through a hollow boss of a casing housing the platen. A cavity defined between the sidewalls of the cylinders receives a vibration-proof lining and/or an acoustical layer. The lining suppresses a vibration of the platen knob. The acoustical layer seals the boss of the casing and leaks no noise from the interior of an electronic apparatus including a platen.

REFERENCES:
patent: 924606 (1909-06-01), Sokolov
patent: 993025 (1911-05-01), Buschmann
patent: 1057365 (1913-03-01), Ursbruck
patent: 2580285 (1951-12-01), Dobson
patent: 4279525 (1981-07-01), Johnston
patent: 4618278 (1986-10-01), Iwai
patent: 4710046 (1987-12-01), Okubo
patent: 5018886 (1991-05-01), Hiramatsu

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