Ink cartridge changeover device in an ink ribbon cassette for a

Details Ink cartridge changeover device in an ink ribbon cassette for a Ink cartridge changeover device in an ink ribbon cassette for a

1983-12-15

1986-06-10

Pieprz, William

Typewriting machines

Including interposed inking device for record-medium

Renovation of used ribbon

400208, 4001961, 24615, B41J 3116, B41J 3202

Patent

active

045940118

ABSTRACT:
An ink ribbon cassette for a printer includes a casing defined by a top wall and a bottom wall, at least one ink cartridge disposed slidably in the casing, a transfer roller disposed in the casing for transferring ink from the ink cartridge to an ink ribbon, and a spring urges the ink cartridge toward the transfer roller. The top wall has a slot extending radially relative to the transfer roller. A first projection is formed on the ink cartridge, and extends upwardly through the slot. A pair of elastic levers extend from the first projection radially relative to the transfer roller, and are disposed in the slot. Each lever has a second projection formed adjacent to an end thereof remote from the first projection. A pair of third projections are provided on the opposite edges of the slot for engaging the second projections to maintain the ink cartridge in its retracted position away from the transfer roller. A fourth projection is formed on the end of each lever, and projects above the slot by a height which is sufficient to enable the disengagement of the second projections from the third projections when the fourth projections are depressed to permit the spring to move the ink cartridge into engagement with the transfer roller.

REFERENCES:
patent: 1601359 (1926-09-01), Harrington
patent: 2292429 (1942-08-01), Buick
patent: 3072938 (1963-01-01), Phanenf
patent: 4150464 (1979-04-01), Tracy
patent: 4153378 (1979-05-01), Scherrer et al.
patent: 4273456 (1981-06-01), Haftmann
patent: 4322172 (1982-03-01), Furrow

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