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:
May. 21, 1991
Filed:
Jun. 14, 1989
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An apparatus for the formation of images which includes two process-cartridges, one of which is a photosensitive cartridge including a photosensitive drum, a charger, a cleaning device, and the like, and the other of which is a developing cartridge including a developing device, a toner storage container, and a used toner collecting container; the developing cartridge being separated into a first cartridge including the developing device alone and a second cartridge including the toner storage container and the used toner collecting container, where the lifetime of the photosensitive cartridge is a first integer times the lifetime of the first cartridge, and the lifetime of the first cartridge is a second integer times the lifetime of the second cartridge, where each of the first and second integers is greater than one.