Photocopying – Contact printing – Light boxes
Patent
1991-02-13
1992-03-31
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355203, 355204, G03G 2100
Patent
active
051012332
ABSTRACT:
In an electrophotographic recording device which includes a number of consumable parts, there is provided a first memory for storing a currently integrated total number of prints, and a number of prints at replacement of each consumable part. A second memory stores a number of lifetime prints, which is a conversion of the life of each part into a number of prints. A processor performs a first calculation to calculate a number of prints for replaced consumable parts after such replacement and a second calculation to calculate a wear rate of the replaced consumable parts from the number of lifetime prints read out from the second memory, and from the number of prints calculated by the first calculation. An indication section indicates the wear rate obtained from the second calculation. The number of prints stored in the first memory for the consumable parts at replacement is written into the current total number of prints.
REFERENCES:
patent: 4496237 (1985-01-01), Schron
patent: 4707748 (1987-11-01), Ohtsuka et al.
patent: 4751484 (1988-06-01), Matsumoto et al.
patent: 4860052 (1989-08-01), Ito et al.
Akutsu Naoji
Ito Katsuyuki
Itoh Kazuhiko
Negishi Koichi
Okubo Takehiko
Grimley A. T.
Hoffman Sandra L.
OKI Electric Industry Co., Ltd.
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