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:
Oct. 26, 2004
Filed:
Oct. 22, 2001
Yoshiyuki Uemura, Osaka, JP;
Tomihisa Saito, Osaka, JP;
Nippon Sheet Glass Co., Ltd., Osaka, JP;
Abstract
A line-illuminating device having a light guide of which the cross-sectional shape is rectangular and its one corner is chamfered to form an emission plane is provided, in which the light guide is housed in a light guide casing wherein the chamfer dimension of the emission plane is more than 40% of a height dimension of the light guide By enlarging the chamfer dimension and broadening the width of the emission plane the directional characteristics of the emitted light is expanded. In this manner, it is possible to reduce the extent of decrease in the quantity of illuminating light on a document surface when the document surface is elevated.