Typewriting machines – For line-spacing by incremental rotation of platen – By gear train
Patent
1983-07-06
1987-12-29
Wright, Jr., Ernest T.
Typewriting machines
For line-spacing by incremental rotation of platen
By gear train
400320, 400568, 400634, 400656, 400314, B41J 1976
Patent
active
047157372
ABSTRACT:
A printer comprises a paper feed roller, an intermediate gear coupled with the paper feed roller and having a spur gear section on an outer circumferential surface thereof, and a paper feed cam having an axis extending perpendicularly to an axis of the intermediate gear and having on its outer circumferential surface a helical tooth for meshing engagement with the spur gear section of the intermediate gear. The paper feed roller is angularly movable for a predetermined angular interval through the intermediate gear in response to angular movement of the paper feed cam. The paper feed cam has in the outer circumferential surface thereof a gap for disengagement with the intermediate gear. The helical tooth has an inclined end edge for guiding meshing engagement with the intermediate gear.
REFERENCES:
patent: 547324 (1895-10-01), Bohannon
patent: 1683425 (1928-09-01), Thatcher
patent: 1873355 (1932-08-01), Stickney
patent: 3260128 (1966-07-01), Gassino et al.
patent: 3356200 (1967-12-01), De George
patent: 3442364 (1969-05-01), Ragen
patent: 3915281 (1975-10-01), Blomquist et al.
Alps Electric Co. ,Ltd.
Shoup Guy W.
Wright, Jr. Ernest T.
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