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:
Dec. 17, 1991
Filed:
Jun. 26, 1990
Yasuyuki Nukaya, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a photosensitive member, a charger unit provided at a charging station around the photosensitive member, a writing optical system housed in a housing and which casts the optical image of a document image onto the photosensitive member, the housing having a projection opening through which a light beam passes through and an exchanging kit. The exchanging kit includes a developing unit provided at a developing stage around the photosensitive member and a dustproof cover integrated with the developing unit, the dustproof cover having a dustproof glass through which the light beam passes. Furthermore, the exchanging kit is detachably provided around the photosensitive member.