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:
Nov. 19, 1996
Filed:
Nov. 07, 1995
Akihito Ikegawa, Sakai, JP;
Masashi Yamamoto, Settu, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
An image forming apparatus includes a charging member in contact with a photosensitive member for applying a charging voltage at least containing an a.c. component, a laser beam irradiator having a polygon mirror to form an electrostatic latent image and a developing unit for developing the latent image into a visible image and collecting residual developer remaining on the surface of the photosensitive member after the visual image is transferred to a transfer material. The number of revolutions Fp(rps) of the irradiator polygon mirror, the frequency Fb(Hz) of the a.c. component to be applied to the contact charging unit and the system velocity Vp(cm/sec) have a correlation so determined as to meet the requirement of: