Multicolor developing device including expansion/contraction mea

Details Multicolor developing device including expansion/contraction mea Multicolor developing device including expansion/contraction mea

1991-11-19

1994-05-24

Grimley, A. T.

Photocopying

Contact printing

Light boxes

141258, 141279, 222DIG1, 355246, 355260, G03G 1501

Patent

active

053153626

ABSTRACT:
A movable frame member is so mounted on a stationary frame member as to be movable reciprocatingly. A plurality of developing mechanisms are provided on the movable frame member to perform developing in different colors. The same number of toner containers as the number of developing mechanisms are arranged in a fixed manner, and toner feeders for feeding toner into the corresponding developing mechanisms are provided.
Each of the toner feders includes a toner conveying device for conveying toner to an upper end portion of a cylindrical member, and a toner dropping passage means for feeding toner conveyed to the upper end portion of the cylindrical member to the developing mechanism. The toner dropping, passage includes an expansion/contraction device so disposed as to extend along the moving direction of the developing mechanism.

REFERENCES:
patent: 4954844 (1990-09-01), Morita et al.
patent: 5074342 (1991-12-01), Kraehn
Patent Abstracts of Japan vol. 14, No. 534 (P-1135) Nov. 26, 1990 & JP-A-02 226 266 (Canon).

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