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:
Mar. 26, 2002
Filed:
Nov. 23, 1999
Yuji Hosoi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
An optical writing printer head capable of reducing the printing time in the proportion to the print resolution (dot density) is provided. An optical writing printer head is designed to print onto a sheet of photosensitive print paper, which is intermittently fed at a constant paper feeding pitch Qp in a paper feeding direction Z, by irradiating light onto the print paper when the paper is scanned in a scanning direction X intersecting the paper feeding direction Z, and is provided with a first light source group Sr in the paper feeding directgion. The first light source group Sr includes N pieces of light sources Sr , Sr of one color which are arrayed along the paper feeding direction Z at the standard pitch Qs of 1/N of the paper feeding pitch Q, where N is a natural number which is 2 or larger. The first light source group Sr further includes an upstream side light source Sr of the one color at an interval corresponding to the standard pitch Qs positioned at an upstream side of the light sources Sr , Sr with respect to the paper feeding direction Z, and the upstream side light source Sr has a length Lr in the paper feeding direction Z equal to (N−1) times the standard pitch Qs.