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:
Feb. 09, 1993
Filed:
Oct. 10, 1991
Minoru Yoshida, Tokyo, JP;
Kouji Hirano, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A device for developing a latent image on a photosensitive drum in an image forming apparatus, includes a developing roller for supplying a developing agent to the image carrier and a blade for forming a layer of the developing agent on the developing roller. The blade has a curved portion pressing the surface of the developing roller for controlling the thickness of the developing agent layer and for applying a frictional charge to the developing agent on the developing roller. The curved portion includes a first curved surface having a first radius R1 which contacts the surface of the developing roller and a second curved surface having a second radius R2. The relationship between the first and second radius is R1>R2.