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. 24, 2009
Filed:
May. 16, 2007
Susumu Matsusaka, Tokyo, JP;
Kazuhito Kishi, Tokyo, JP;
Yasuhisa Kato, Tokyo, JP;
Akiyasu Amita, Tokyo, JP;
Masami Okamoto, Tokyo, JP;
Yasutada Tsukioka, Tokyo, JP;
Hiromasa Takagi, Tokyo, JP;
Susumu Matsusaka, Tokyo, JP;
Kazuhito Kishi, Tokyo, JP;
Yasuhisa Kato, Tokyo, JP;
Akiyasu Amita, Tokyo, JP;
Masami Okamoto, Tokyo, JP;
Yasutada Tsukioka, Tokyo, JP;
Hiromasa Takagi, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Power is supplied from a capacitor of an auxiliary power source to a secondary heating element of a heating unit, thereby preventing temperature drop of a fixing roller at the time of continuous paper delivery. An allowable range for starting discharge from the capacitor is set to, for example, 30 to 40 volts. A discharge time in which the voltage of the capacitor reduces to a termination value, such as 20 volts, is longer than a time necessary for a reading unit to read a maximum number (for example, 100 sheets) of documents that can be read at one time.