Developing apparatus having improved developer distribution

Electrophotography – Image formation – Development

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

399255, 399256, G03G 1508

Patent

active

061224723

ABSTRACT:
The present invention is to provide a developing apparatus having a supply screw and a recovery screw both of which are arranged vertically to circulate developer, wherein a component in a normal direction of pressure generated by the recovery screw is made larger than that of pressure generated by the supply screw. Thereby, lowering and raising of developer is suppressed and occurrence of fog on the image and the smoke of toner are prevented. Alternatively, a radial member and a centrifugal member are applied to the supply screw and the recovery screw, respectively. Thereby, developer is prevented from moving between screws in the midst of the transportation. Still alternatively, a preliminary stirring portion is provided on extension of a stirring screw at upperstream side. The preliminary stirring portion has a cylindrical body with inlets and outlets. Both inside and outside of the cylindrical body, screws are provided and inclines of screw blades are reversed to each other. Thereby, it enables the developing apparatus to transport the developer which is sufficiently stirred and charged to a development zone without being accompanied by a large-scaled apparatus.

REFERENCES:
patent: 4928144 (1990-05-01), Kasahara et al.
patent: 4940014 (1990-07-01), Saijo et al.
patent: 5220382 (1993-06-01), Hediger
patent: 5495320 (1996-02-01), Araki et al.
patent: 5682584 (1997-10-01), Hattori et al.
patent: 5758238 (1998-05-01), Mordenga et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Developing apparatus having improved developer distribution does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Developing apparatus having improved developer distribution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Developing apparatus having improved developer distribution will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1082110

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.