Electrostatographic developer unit having multiple magnetic...

Electrophotography – Image formation – Development

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Reexamination Certificate

active

11453636

ABSTRACT:
A development station in an electrostatographic imaging machine impedes the flow of carrier particles out of the development station as the developer moves from an upper to a lower magnetic roll. The development station includes a developer housing, for retaining a quantity of developer having semi-conductive carrier particles and toner particles, a first magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the first magnetic roll to present developer on one side of the first magnetic roll to the photoreceptor, a second magnetic roll having a stationary core with at least one magnet and a sleeve having longitudinal grooves that rotates about the stationary core of the second magnetic roll to receive developer from the first magnetic roll and present developer on one side of the second magnetic roll to the photoreceptor, the second magnetic roll being vertically displaced from the first magnetic roll so that a gap exists between the first and the second magnetic rolls, and a magnetic seal located in the gap between the first and the second magnetic rolls to impede the outflow of carrier particles from the developer moving from the first magnetic roll to the second magnetic roll.

REFERENCES:
patent: 3638614 (1972-02-01), Young et al.
patent: 3640248 (1972-02-01), Nielander
patent: 4048957 (1977-09-01), Tagawa
patent: 4436055 (1984-03-01), Yamashita et al.
patent: 4465356 (1984-08-01), Joseph et al.
patent: 4833504 (1989-05-01), Parker et al.
patent: 5930569 (1999-07-01), Roof et al.
patent: 6512902 (2003-01-01), Kasiske et al.
patent: 6671473 (2003-12-01), Miyabe
patent: 6876829 (2005-04-01), Masham
patent: 6968138 (2005-11-01), Akutsu
patent: 6978108 (2005-12-01), Sakamaki
patent: 7010253 (2006-03-01), Kakimoto
patent: 7054584 (2006-05-01), Hirobe
patent: 7236727 (2007-06-01), Fukuda

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

Electrostatographic developer unit having multiple magnetic... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrostatographic developer unit having multiple magnetic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrostatographic developer unit having multiple magnetic... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3947849

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