Photocopying – Contact printing – Light boxes
Patent
1990-03-27
1993-01-05
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355215, G03G 1509, G03G 2100
Patent
active
051775360
ABSTRACT:
A developing apparatus is provided with a container for accommodating a developer for containing magnetic particles, and a rotatable carrying member is disposed at least partly in the container and faces an image bearing member at a developing station. The rotatable developer carrying member carries the developer thereon to the developing position. A magnet is disposed in the developing carrying member and includes a plurality of magnets for conveying the developer. A magnetic member is disposed close to the circumferential surface of the developer carrying member and in a circumferential direction of the developing carrying member in a region thereof where the developer carrying member is disposed in the developer container, adjacent to a longitudinal end of the developer carrying member. The magnetic member is magnetized by the magnet and the magnetic member cooperates with the magnet to form a magnetic field for forming a magnetic brush of the developer in a gap between the magnetic member and the developer carrying member.
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Xerox Disclosure Journal, "Magnet For Toner Contamination Control", vol. II, No. 1, Jan./Feb. 1986.
Itoh Masahiro
Sakemi Yuji
Satomura Hiroshi
Watanabe Akira
Braun Fred L.
Canon Kabushiki Kaisha
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