Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1977-05-25
1978-08-29
Moses, Richard L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
1525651, 118652, G03G 2100
Patent
active
041100344
ABSTRACT:
A magnetic brush cleaning apparatus removes residual toner particles from the periphery of a photoconductive drum after a copying operation. The cleaning apparatus comprises a cylinder which is rotated in close proximity with the drum and a plurality of magnets provided inside the cylinder. The lower portion of the cylinder is immersed in ferromagnetic carrier particles in a carrier container. Due to the force of the magnets, carrier particles adhere to the periphery of the cylinder to form a magnetic brush which brushingly engages with the drum and removes the residual toner particles. A voltage is applied to the cylinder to attract the toner particles to the periphery thereof. The magnets are arranged with their poles spaced in an alternating north and south arrangement relative to the circumference of the cylinder so that the carrier particles are alternatingly attracted and repelled, thereby facilitating movement of the toner particles to the periphery of the cylinder. A carrier scraper blade removes the radially outward carrier particles from the cylinder and guides the same into the carrier container. A toner scraper blade subsequently removes the radially inward toner particles and returns the same to a toner container for recycling.
REFERENCES:
patent: 3865080 (1975-02-01), Hudson
patent: 3918808 (1975-11-01), Narita
patent: 3994725 (1976-11-01), Volkers
patent: 4006987 (1977-02-01), Tomono et al.
Jordan Frank J.
Moses Richard L.
Ricoh & Company, Ltd.
LandOfFree
Drum cleaning apparatus for electrostatic copying machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drum cleaning apparatus for electrostatic copying machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drum cleaning apparatus for electrostatic copying machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1630344