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. 19, 1998
Filed:
Dec. 01, 1995
Masaji Nishikawa, Hachioji, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An ink jet printer comprises a plurality of multi-nozzle array ink jet print heads arranged in a sub-scanning direction in which recording paper is sent. The ink jet print heads are arranged for scanning forward and backward in a main scanning direction to record different color ink onto the recording paper, and each of the ink jet print heads has a nozzle unit including a plurality of nozzle portions. The plurality of nozzle portions are arranged to jet a predetermined ink to the recording paper sent in the sub-scanning direction every time the forward scanning and the backward scanning are performed so as to form a stripped scanning printed area on the recording paper corresponding to a scanning width in the sub-scanning direction of each of the nozzle units of the ink jet print heads. The ink jet print heads are structured to satisfy W<P<2W, where P is an array pitch of the ink jet print heads, and W is the scanning width in the sub-scanning direction of each of the nozzle units of the ink jet print heads. In addition, the array pitch P substantially satisfies W (1+(1/N')), where N' corresponds to one of (i) a number of heads of basic color ink and (ii) a number of heads of all colors.