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:
Jul. 22, 1986
Filed:
Sep. 24, 1984
Shiroh Kondoh, Sagamihara, JP;
Ricoh Company, Ltd., , JP;
Abstract
A device for developing an electrostatic latent image carried on an image bearing member comprises a developing sleeve for transporting a magnetic developer as carried thereon through a developing station where the developer is applied to the image bearing member to develop the latent image thereon, a doctor blade for forming a developer film of predetermined thickness and charge, a plurality of magnets disposed inside of the developing sleeve to have the magnetic developer attracted to the developing sleeve, and a scraper for removing the developer remaining on the sleeve after development. In the preferred embodiment, the scraper is pivotally supported and at least comprised of a magnetic material thereby allowing it to be pressed against the sleeve due to magnetic attraction from the magnets inside of the sleeve. In addition, the scraper is provided with a surface-hardened portion at least at that section which comes into contact with the developer on the sleeve when the scraper is pressed against the sleeve.