Platen variable

Details Platen variable Platen variable

1979-03-22

1980-11-25

Pieprz, William

Typewriting machines

For line-spacing by incremental rotation of platen

By irregular increments of platen rotation

74640, 74 1054, B41J 1996

Patent

active

042355567

ABSTRACT:
A platen variable apparatus is disclosed for rotatably adjusting a platen in step increments and in fine amounts in a typewriter. The apparatus includes an individual hub member rotatably mounted on a platen extension and having teeth thereon intermeshed with teeth of a flexspline fixed on the platen extension. A coarse adjusting member is fixedly coupled on the platen extension for positively rotating the platen in step increments controlled by a detent. A rotatable fine adjusting wheel has an internal wave generator surface that cooperates with the flexspline for moving the flexspline relative to the hub member which adjusts the platen in fine amounts.

REFERENCES:
patent: 3206703 (1965-09-01), Ferrell
patent: 3385116 (1968-05-01), Carlson et al.
patent: 3444760 (1969-05-01), Claxton et al.
patent: 3447385 (1969-06-01), Humphreys
patent: 3461997 (1969-08-01), Humphreys
patent: 3931743 (1976-01-01), Valdettaro

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