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. 22, 1984
Filed:
Jul. 12, 1982
Masumi Ikesue, Tokyo, JP;
Nobuyuki Yanagawa, Chigasaki, JP;
Ricoh Company, Ltd., , JP;
Abstract
A dry type development apparatus comprising (1) a developer container disposed near a latent-electrostatic-image-bearing photoconductor, a development roller, disposed within the developer container, comprising a rotatable non-magnetic sleeve and inner magnets, for supplying the toner to the photoconductor for development of the latent images, a rotatable bucket wheel for supplying the toner to the development roller, a doctor blade for forming on the development roller a toner layer with a predetermined thickness by scraping the excess toner off the toner layer; and (6) a separator which extends over the bucket wheel and guides the toner scraped off by the doctor blade onto the bucket wheel or to the developer container, includes the improvement wherein the development roller and the bucket wheel are rotated in the same direction, and the toner flows from the lower portion of the developer roller to the bucket wheel, then towards the upper portion of the development roller, and, of the toner transferred from the bucket wheel to the development roller, the toner scraped off the toner layer by the doctor blade is carried onto the separator, and is returned onto the bucket wheel or to the developer container, and, in the meantime, the toner deposited on the development roller is carried to the development portion of the photoconductor for development of latent electrostatic images, and the excess toner which is not used for the development is carried below the development roller. A slit exposure plate for forming latent electrostatic images on the surface of the photoconductor is integral with a development unit which integrally includes at least a developer container and a development roller and which is detachable from and reattachable to the body of the development apparatus.