Photocopying – Contact printing – Light boxes
Patent
1989-07-18
1991-07-30
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118658, 355253, G03G 1509
Patent
active
050363646
ABSTRACT:
An image forming apparatus is provided with an electrostatic latent image forming member disposed on an image bearing member and developing member for developing the latent image. A developer carring member is rotatable in a first direction to carry a developer to a developing zone to develop the electrostatic latent image and is rotatable in an opposite direction for a predetermined period when it does not develop the latent image. A stationary magnet is disposed in the developer carrying member. The magnet has a first magnetic pole and a second magnetic pole having the same magnetic polarity at positions downstream of the developing zone with respect to the first direction. The first and second magnetic poles are disposed adjacent to each other, with the second magnetic pole disposed downstream of the first magnetic pole with respect to the first direction. A container is provided for containing the developer to be carried out of the container by the rotation of the developer carrying member in the first direction. The developer is supplied to the developer carrying member in the container at a position downstream of a position where a magnetic force is minimum between the first and second magnetic poles, with respect to the first direction. During the rotation of the developer carrying member in either direction, the developer is removed from the developer carrying member by a repelling magnetic force.
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European Search Report.
Annex to the European Search Report.
Canon Kabushiki Kaisha
Grimley A. T.
Royer William J.
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