Developing apparatus

Details Developing apparatus Developing apparatus

1980-05-13

1983-02-15

Lawrence, Evan K.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

355 3DD, G03G 1509

Patent

active

043734685

ABSTRACT:
A developing apparatus includes a developer vessel for supplying one-component magnetic toner as a developer, a movable developer carrier having a surface for receiving the developer, a magnetic thickness limiting member disposed close to the surface of the carrier, a fixed magnet positioned within the carrier with a magnetic pole in facing relationship with the limiting member, a mounting assembly for mounting the limiting member for movement toward and away from the facing magnet pole and including a lock for maintaining the limiting member at a predetermined distance from the carrier. The carrier is preferably a sleeve, the shaft ends of which are mounted on the reservoir, with the magnet journaled to the sleeve with one end extending through the associated sleeve shaft and having a rotation preventing member connected thereto. The sleeve is rotated through a driving connection between a gear mounted on a latent image bearing member and one associated with the sleeve.
The developer vessel may include an outer lid with a magnetic seal and an inner lid having edges which define an aperture and block reverse developer flow. The apparatus may further include felt sealing elements located adjacent to the opposite ends of the sleeve to direct developer inwardly along the sleeve away from the sleeve ends.

REFERENCES:
patent: 1755042 (1930-04-01), Zoller
patent: 2842280 (1958-07-01), Nelson
patent: 2932545 (1960-04-01), Foley
patent: 3953121 (1976-04-01), Reichart, Jr.
patent: 4052959 (1977-10-01), Hayashi et al.
patent: 4081571 (1978-03-01), Nishihama et al.
patent: 4194830 (1980-03-01), Ohnuma et al.
patent: 4258372 (1981-03-01), Ishikawa

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