Drum cartridge for electrophotographic apparatus with two-piece

Details Drum cartridge for electrophotographic apparatus with two-piece Drum cartridge for electrophotographic apparatus with two-piece

1991-01-15

1992-05-12

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355211, G03G 1500

Patent

active

051132206

ABSTRACT:
A drum cartridge with a protective cover for an electrophotographic apparatus is disclosed.
The protective cover consisting of an upper and a lower covers separately formed from each other, and the upper cover is operable to be opened and closed by a first gear pivoting around a drum shaft of a photosensitive drum. The lower cover is operable to be opened and closed by a connecting rod coupled to a second gear in mesh with the first gear, and has a driving pin driven by external force.
According to the construction, the protective cover is automatically opened and closed by mounting and separating the drum cartridge, and capable of making the exposed area of a photosensitive drum be wide in open position and perfectly protecting the photosensitive drum in closed position.

REFERENCES:
patent: 4462677 (1984-07-01), Onoda
patent: 4540268 (1985-09-01), Toyono et al.
patent: 4575221 (1986-03-01), Onoda et al.
patent: 4708455 (1987-11-01), Kubota et al.
patent: 4829334 (1989-05-01), Takamatsu et al.
patent: 4908668 (1990-03-01), Takamatsu et al.
patent: 5061959 (1991-10-01), Kinoshita

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