Electrophotography – Image formation – Development
Patent
1999-10-19
2000-12-26
Royer, William J.
Electrophotography
Image formation
Development
399259, 399260, 399359, G03G 1508
Patent
active
061672270
ABSTRACT:
A developing unit and an image forming apparatus includes drive and control mechanisms for the conveyance of collected toner and fresh toner in an uncomplicated structure and an uncomplicated toner supplying roller structure for the reduction in manufacturing cost. Fresh toner and collected toner stored in housing parts of a toner housing are discharged from an outlet via openings formed in a partitioning member for forwarding to a developing section by a toner supplying roller disposed to confront the outlet. The toner supplying roller is provided in common to fresh toner and collected toner. The toner supplying roller includes a single rotary shaft and a plurality of composite members which are fit into the rotary shaft. Each of the composite members has a cylindrical hollow body and a cylindrical elastic body which is fit onto the outer peripheral surface of the hollow body. The composite members are disposed correspondingly to the housing parts.
REFERENCES:
patent: 5128724 (1992-07-01), Hayashi et al.
patent: 5493382 (1996-02-01), Takagaki et al.
Fujita Syouichi
Kawabata Itaru
Nishino Toshio
Saiko Hideji
Sakita Hirofumi
Royer William J.
Sharp Kabushiki Kaisha
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