Photocopying – Contact printing – Light boxes
Patent
1990-10-01
1993-03-23
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355202, 355208, 355210, 355260, G03G 2100
Patent
active
051968843
ABSTRACT:
An apparatus having a plurality of replaceable parts. Replaceable parts to which the same life is assigned beforehand are replaced at the same time by hand or by use of a jig. Lives which are integral multiples of the shortest life which one of the replaceable parts has each is assigned to respective one of the other replaceable parts. Hence, when the life of a certain part has expired, the part having the shortest life is automatically replaced together with the part whose life has expired. The replaceable parts each is mounted on and locked to the apparatus and, when the life thereof has expired, unlocked from the apparatus. The expiration of the life is detected either electrically or mechanically, and the parts reached the end of the life is indicated. Before the life of a replaceable part expires, a spare part for replacing it is prepared by detecting that the life is about to expire. The deterioration of a part having a comparatively long life is measured to correct the time for replacing it.
REFERENCES:
patent: 4912563 (1990-03-01), Narita
patent: 4974020 (1990-11-01), Takamatsu et al.
patent: 5017962 (1991-05-01), Tsuji et al.
patent: 5051778 (1991-09-01), Watanabe et al.
Sugiyama Toshihiro
Takaya Toshihiko
Grimley A. T.
Ricoh & Company, Ltd.
Smith Matthew S.
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