Ink ribbon cassette

Details Ink ribbon cassette Ink ribbon cassette

1989-05-10

1991-09-03

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

242192, 400228, 400236, B41J 3528

Patent

active

050447947

ABSTRACT:
An ink ribbon cassette includes a supply side ribbon spool, a take-up side ribbon spool, a cassette case containing therein the supply side and take-up side ribbon spools and pivotably supporting at least the take-up side ribbon spool through a lever member and having an opening through which an outside feed tooth may mesh with the take-up side ribbon spool. A support portion provided in the opening for contacting the peripheral surface of the take-up side ribbon spool prevents the take-up side ribbon spool from protruding outwardly, and a biasing device impart a rotational force to the lever member so that the take-up side ribbon spool is urged against the support portion.

REFERENCES:
patent: 3618869 (1971-11-01), Cialone
patent: 4010839 (1977-03-01), Guerrini et al.
patent: 4302118 (1981-11-01), Schaefer
patent: 4329073 (1982-05-01), Craft
patent: 4367052 (1983-01-01), Steger
patent: 4623272 (1986-11-01), Kondo

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