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:
Sep. 08, 2015
Filed:
Jun. 25, 2014
Masataka Akaishi, Kanagawa, JP;
Tsuyoshi Ueno, Fukuoka, JP;
Motokazu Hasegawa, Kanagawa, JP;
Yuuki Oka, Kanagawa, JP;
Masataka Akaishi, Kanagawa, JP;
Tsuyoshi Ueno, Fukuoka, JP;
Motokazu Hasegawa, Kanagawa, JP;
Yuuki Oka, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A fixing device includes a heating body; first and second coils for induction heating that heat the heating body by an induction heating method; a first switching element connected to the first coil for induction heating; a second switching element connected to the second coil for induction heating; a driving signal transmission unit that sends a first drive signal to the first switching element and a second drive signal to the second switching element so that the first switching element and the second switching element operate at the same timing to apply a first input voltage to the first coil for induction heating and a second input voltage to the second coil for induction heating; and a voltage drop unit that steps down the first input voltage applied to the first coil for induction heating so that the first input voltage is lower than the second input voltage.