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:
Mar. 18, 2008
Filed:
Feb. 13, 2006
Hiromi Ogiyama, Setagaya-ku, JP;
Kohki Katoh, Meguro-ku, JP;
Akihiro Sugino, Numazu, JP;
Mitsuru Takahashi, Kawasaki, JP;
Katsuya Kawagoe, Ohta-ku, JP;
Yuuji Sawai, Yokohama, JP;
Hiromi Ogiyama, Setagaya-ku, JP;
Kohki Katoh, Meguro-ku, JP;
Akihiro Sugino, Numazu, JP;
Mitsuru Takahashi, Kawasaki, JP;
Katsuya Kawagoe, Ohta-ku, JP;
Yuuji Sawai, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A transfer device transfers a visual image from an image carrier to a recording medium. The transfer device includes a first transfer element that moves and receives the visual image from the image carrier on a first surface of the first transfer element, a second transfer element provided opposite to the first surface of the first transfer element to pinch and convey the recording medium through a secondary transfer nip part, a facing roller provided on a second surface of the first transfer element opposite to the first surface thereof, and a constant-current power supply that applies an electric current voltage to a core metal of the facing roller to transfer the visual image from the first transfer element to the recording medium. The electric current voltage applied to the core metal has a polarity equal to a polarity of the visual image and is subjected to a constant-current control.