Electrophotographic copying machine which integrates components having substantially equal service lives into respective detachable units formed of a developing unit, a photoreceptor unit and a toner cartridge unit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 24, 1991
Grant Date -
N/A
app pub date -
Dec 15, 1989
filing date -
Dec 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electrophotographic apparatus has its electrophotographic component parts divided into three units consisting essentially of a developing unit A, a photoreceptor unit B and a toner cartridge unit C. Each of the units is capable of being detached from and reattached to the main body of the apparatus while maintaining the required relative positions. The service lives of the units are set in such a manner that the ratio therebetween is represented as a ratio between integers, and the relationship therebetween in magnitude satisfies the relationship of the service life of the developing unit A.gtoreq.the service life of the photoreceptor unit B.gtoreq.the service life of the toner cartridge unit C. Thus, the apparatus enables its maintenance to be performed easily and economically without requiring any increase in the size and the cost of the electrophotographic mechanisms.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully