Drive for friction rolls in printers

Details Drive for friction rolls in printers Drive for friction rolls in printers

1981-04-13

1983-07-26

Burr, Edgar S.

Typewriting machines

For line-spacing by incremental rotation of platen

By gear train

400585, 400588, B41J 1150, B41J 1978

Patent

active

043951520

ABSTRACT:
Two friction rolls are journalled on a driven shaft, and a differential being keyed to that shaft causes that one of the rolls to be driven which is not held. The rolls are alternately held by, preferably, latching devices which are operated on limit positions of the print head.

REFERENCES:
patent: 1362338 (1920-12-01), Messenger
patent: 1451293 (1923-04-01), Doody
patent: 1539384 (1925-05-01), Coo
patent: 1604645 (1926-10-01), Kurowski
patent: 1705946 (1929-03-01), Smith
patent: 1737723 (1929-12-01), Kurowski et al.
patent: 4204779 (1980-05-01), Lee et al.

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