Image forming apparatus which stores counted value in different

Details Image forming apparatus which stores counted value in different Image forming apparatus which stores counted value in different

1993-08-11

1995-09-19

Beatty, Robert

Photocopying

Contact printing

Light boxes

355200, G03G 1500

Patent

active

054520592

ABSTRACT:
When a front cover of a body of a printer is opened, a count value in a system RAM included in a printer body control processor is recorded in a counter in an E.sup.2 PROM included in a process cartridge through a system bus and an input/output port. On the other hand, when the front cover of the printer body is closed, a count value of the E.sup.2 PROM is recorded in the counter in the system RAM. Even in the case where a main switch is turned off, electric power from a receptacle is supplied to each control circuit through a transformer.

REFERENCES:
patent: 4774544 (1988-09-01), Tsuchiya et al.
patent: 4851875 (1989-07-01), Tanimoto
patent: 4961088 (1990-10-01), Gilliland et al.
patent: 5066978 (1991-11-01), Watarai
patent: 5206685 (1993-04-01), Hara et al.
patent: 5208631 (1993-05-01), Jacobs et al.
patent: 5253020 (1993-10-01), Matsushita et al.
patent: 5272503 (1993-12-01), LeSueur et al.

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