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:
Jul. 02, 2013
Filed:
Nov. 15, 2011
Yoichi Kawabata, Kanagawa, JP;
Yoichi Kawabata, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a head tank and a main tank that sends liquid to the head tank. When the remaining ink amount in the main tank is less than or equal to a predetermined amount (near empty), the liquid sending amount to be sent from the main tank to the head tank required for detecting a full state of the head tank is set to be a second liquid sending amount which is greater than a usual first liquid sending amount. An ink supply operation is performed to send liquid corresponding to the second liquid sending amount, from the main tank to the head tank. Then, it is determined whether the head tank is in a full state. When the head tank is not in a full state, the main tank is determined to be in an ink empty state.