Photocopying – Contact printing – Light boxes
Patent
1991-09-06
1992-11-24
Grimley, A. T.
Photocopying
Contact printing
Light boxes
366327, G03G 1506
Patent
active
051667320
ABSTRACT:
In a developer agitating method, a carrier and a toner are mixed by a spiral in an agitating passage to provide the developer. The developer is conveyed along the axis of the spiral through a high conveying speed section of the passage wherein the developer is agitated in a manner such that a part of the spiral is exposed by extending out of the developer. The developer is conveyed from the high-speed section to a low-speed section wherein the mixture rate of the toner and the carrier is detected. In a preferred embodiment, high-speed and low-speed conveying are controlled according to the pitch of the fans of the spiral. In another preferred embodiment of a developer agitating apparatus, the spiral is arranged with a restricting member which reduces the performance of developer carrying in the vicinity of the toner density sensor, but not at the toner supply mouth.
REFERENCES:
patent: 3167455 (1965-01-01), Laben et al.
patent: 4586059 (1986-04-01), Matsuura
patent: 4784081 (1988-11-01), Knott
patent: 4937625 (1990-06-01), Kato et al.
patent: 4963929 (1990-10-01), Ueda et al.
patent: 5012286 (1991-04-01), Kawano et al.
Grimley A. T.
Mita Industrial Co. Ltd.
Ramirez Nestor R.
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