Ribbon cassette for mechanically unlocking a printing mechanism

Details Ribbon cassette for mechanically unlocking a printing mechanism Ribbon cassette for mechanically unlocking a printing mechanism

1990-02-27

1992-02-18

Burr, Edgar S.

Typewriting machines

Including interposed inking device for record-medium

Package for ribbon facilitating mounting of ribbon on...

4002081, 400664, 4001572, B41J 3528

Patent

active

050888455

ABSTRACT:
A ribbon cassette is selectively mounted in a printing device having an operating mechanism actuable between locked and released states. The ribbon cassette has a casing for accommodating therein a print ribbon that cooperates with the operating mechanism for printing characters. The cassette also includes an actuating mechanism for mechanically unlocking the operating mechanism to the released state when the casing is inserted into the printing device. In a preferred embodiment, the actuating mechanism is a projection on a wall of the casing that abuts a locking linkage within the printing device and moves the locking linkage to unlock the operating mechanism.

REFERENCES:
patent: 4623272 (1986-11-01), Kondo
patent: 4624592 (1986-11-01), Purcell
patent: 4642658 (1987-02-01), Arakawa
patent: 4712933 (1987-12-01), Natsume
patent: 4728208 (1988-03-01), Iwase et al.
patent: 4729676 (1988-03-01), Smith et al.
patent: 4754920 (1988-06-01), Kitayami et al.
patent: 4789256 (1988-12-01), Ukmar et al.
patent: 4810117 (1989-03-01), Hattori
patent: 4900171 (1990-02-01), Mueller et al.
patent: 4904097 (1990-02-01), Falconieri et al.

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