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. 18, 2004
Filed:
Dec. 24, 1998
Yuji Tsuruoka, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
When an exchanged ink tank is considered as “brandnew” by an information writing circuit, a first fuse is blown. A third fuse to the fifth fuse are blown according to individual discrimination number next to the used individual discrimination number stored in a RAM. Then, an integrating counter according to the individual discrimination number is selected and this selected counter value is reset. On the other hand, when the exchanged ink tank is considered as “used”, and individual discrimination number written by the third fuse to the fifth fuse is read out, and the integrating counter according to the individual discrimination number is selected. The number of printing dots per line is counted and the integrating value is compared to the predetermined waste count number of ink per line. When the integrating value is over the waste count number, an empty message is shown on a display portion.