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. 08, 2012
Filed:
Sep. 01, 2009
Yoichi Yamada, Shiojiri, JP;
Masaru Kobashi, Matsumoto, JP;
Mikio Furumizu, Matsumoto, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An image forming apparatus includes: a latent image carrier; a first charging unit which charges the latent image carrier; a second charging unit which supplies a charge having a reverse polarity of the charged polarity of the toner; a toner carrying roller which carries a toner layer containing both a contact toner which comes in direct contact with the surface of the toner carrying roller and a non-contact toner which comes in contact with the contact toner and does not come in contact with the surface of the toner carrying roller; an electric field forming unit which develops the electrostatic latent image by the toner by generating an alternate electric field as a toner fly electric field between the latent image carrier and the toner carrying roller; and a transfer unit which transfers a toner image formed by developing the electrostatic latent image to a transfer medium.