Ribbon cassette and method for operating an electronically contr

Details Ribbon cassette and method for operating an electronically contr Ribbon cassette and method for operating an electronically contr

1987-10-02

1989-01-10

Pieprz, William

Typewriting machines

Including interposed inking device for record-medium

Means auxiliary to ribbon mechanism

400208, B41J 4100, B41J 3530

Patent

active

047970189

ABSTRACT:
A ribbon cassette with a memory makes it possible to provide a relatively exact determination of either the amount of ribbon remaining or the end of the ribbon with small mechanical outlay in an electronically controlled office machine or typewriter. A memory which contains external contacts and is capable of counting and storing values is provided from which base units can be subtracted by the control unit of the machine depending on the amount of ribbon advanced. The novel ribbon cassette makes it possible to dependably determine and display either the amount of ribbon remaining or the end of the ribbon.

REFERENCES:
patent: 3731781 (1973-05-01), Candill et al.
patent: 4386862 (1983-06-01), Kittel et al.
patent: 4491430 (1985-01-01), Kuelzer
patent: 4494886 (1985-01-01), Kondo et al.
patent: 4577200 (1986-03-01), Rix et al.
patent: 4636097 (1987-01-01), Goubeanx
patent: 4655624 (1987-04-01), Kondo et al.

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