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, 2002
Filed:
Jun. 22, 2001
Nobuo Matsumoto, Kanagawa, JP;
Eiichi Kito, Kanagawa, JP;
Kiyotaka Kaneko, Kanagawa, JP;
Yasuyuki Hosono, Kanagawa, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
An ink jet printer includes an ink jet printing head, having plural recording elements arranged in a main scan direction. Feeder roller sets move continuous recording sheet relative to the printing head in a sub scan direction, to print an image to the continuous recording sheet. A printing head inspecting device for the printer is provided. A controller causes the feeder roller set to set first and second line positions of the continuous recording sheet sequentially at the printing head. While one of the first and second line positions is set at the printing head, the controller simultaneously drives recording elements in one of first and second groups into which the recording elements are grouped in the printing head, to print one check dot train to the continuous recording sheet. Thus, two check dot trains are printed in the first and second line positions. Each of the first and second groups includes plural recording elements intermittently arranged in the printing head. An inspection sensor detects the two check dot trains, to inspect whether the recording elements print at intended density.