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. 27, 2014
Filed:
Oct. 03, 2011
Jun Shiori, Kanagawa, JP;
Jun Yura, Kanagawa, JP;
Yukiko Iwasaki, Kanagawa, JP;
Masaki Sukesako, Kanagawa, JP;
Hiroyuki Sugiyama, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Hironobu Takeshita, Kanagawa, JP;
Jun Shiori, Kanagawa, JP;
Jun Yura, Kanagawa, JP;
Yukiko Iwasaki, Kanagawa, JP;
Masaki Sukesako, Kanagawa, JP;
Hiroyuki Sugiyama, Kanagawa, JP;
Kazuaki Kamihara, Tokyo, JP;
Hironobu Takeshita, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a developing device including a developing roller to bear a developing agent to develop a latent image formed on an image bearing member, a cooling device to reduce an internal temperature of the image forming apparatus, a controller to calculate a travel distance of the developing roller to control the cooling device, and a memory unit to store the total travel distance of the developing roller. The controller calculates the total travel distance of the developing roller every Y minutes in the last X minutes, and a difference between the latest total travel distance of the developing roller and the total travel distance stored Z minutes ago by the memory unit to obtain the total travel distance during Z minutes and operate the cooling device for W minutes after image forming operation where the difference is equal to or greater than a threshold value M.