Photocopying – Contact printing – Light boxes
Patent
1988-06-23
1990-11-27
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355210, 355260, G03G 1506, G03G 2100
Patent
active
049740237
ABSTRACT:
A developing device of an electrophotographic copier is structured separably into two mutually attachable and internally connected sections. One of these sections is disposed adjacent to the copier's photoreceptor and contains a developing roller and the other section distal from the photoreceptor is made of a relatively inexpensive synthetic resin material, including a stirrer roller. When the developing agent is spent, the two sections are separated and only the second part with the stirring roller is discarded for replacement. In order that the spent developing agent can be effectively collected, a bar magnet may be inserted into a chamber formed inside the shaft of the stirrer roller to make use of its magnetic force or a scrapper may be provided to scrape off the developing agent remaining attached to the developing roller. In the case of a clam shell type copier with a top part of the main body made openable rotatingly with respect to its base part, the developing device becomes tilted when the copier is opened for its replacement. A device for shaking the tank can effectively cause the developing agent remaining inside to move into the lower section of the device for easy collection.
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Aimoto Toyoka
Miyaji Takashi
Satou Kazuhiro
Braun Fred L.
Sharp Kabushiki Kaisha
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