The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 14, 1989
Filed:
Feb. 06, 1987
Sachio Sasaki, Kawasaki, JP;
Masahiro Wanou, Kawasaki, JP;
Masatoshi Kimura, Yokohama, JP;
Junzo Nakajima, Yokohama, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A compact and simple structured electrophotographic printing apparatus having a single magnetic developer, in which an accumulation of toner particles is formed on a photosensitive member at a downstream position from the magnetic developer. The accumulation of the toner particles is formed by moving a photosensitive film and a magnetic brush in rubbing contact with the film in mutually opposite directions, or by deforming a magnetic field generated by the magnetic developer, using a magnetic piece. A recording electrode is disposed on a sleeve of the magnetic developer and facing the photosensitive film. Bias voltages, having polarities opposite to each other with respect to the photosensitive film, are respectively applied to the recording electrode and the sleeve. An optical beam is projected onto the photosensitive film in a region facing the recording electrode. Thus, with the aid of toner particles located between the recording electrode and the photosensitive film and the accumulation of the toner particles, sensitizing, developing and scavenging are carried out simultaneously, and thus a toner image is produced on the photosensitive film. For a magnetic developer having a rotatable sleeve, a specially designed recording electrode is disclosed. The photosensitve member may be in the form of a solid flat plane, a drum, or a flexible belt-like film.