Electrophotographic developing device having a shaped doctor boa

Details Electrophotographic developing device having a shaped doctor boa Electrophotographic developing device having a shaped doctor boa

1987-09-14

1989-01-10

Beck, Shrive

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

118261, 355 3DD, G03G 1509

Patent

active

047965614

ABSTRACT:
In an electrophotographic developing device, its doctor blade disposed adjacent to a magnetic roll so as to control the thickness of a layer of magnetic developing agent conveyed by the magnetic roll has an edge which is curved in such a manner that the gap between the edge and the magnetic roll is a minimum in the vicinity of the middle of the magnetic roll, whereby the layer of magnetic developing agent is made uniform in thickness and the printing density is made uniform despite gravitational sagging of the roll.

REFERENCES:
patent: 4275683 (1981-06-01), Kutz et al.
patent: 4575220 (1986-03-01), Sakamoto et al.
PTO 88-1159; English Translation of Japanese Kokai Patent 61-80182; May, 1988.
PTO 88-1160; English Translation of Japanese Kokai Patent 61-90174; May, 1988.

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