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:
Nov. 11, 1997
Filed:
Jun. 06, 1995
Tsutomu Maruyama, Hiratsuka, JP;
Atsushi Akiyama, Chigasaki, JP;
Hiroyasu Matsuki, Hiratsuka, JP;
Kazuo Sanada, Chiba, JP;
Sadao Chigira, Chiba, JP;
Masanobu Hidaka, Tokyo, JP;
Kansai Paint Co., Ltd., Hyogo-ken, JP;
Fujikura Ltd., Tokyo, JP;
Matsuo Sangyo Co., Ltd., Osaka-fu, JP;
Abstract
A method for reading of information, which comprises printing information on a metal substrate or a substrate capable of transmitting infrared rays of 2-10 .mu.m wavelength, with a marking ink containing tin oxide, indium-tin mixed oxide or a mixture of tin oxide or indium-tin mixed oxide and at least one compound selected from the group consisting of alumina, barium sulfate, silicon dioxide and calcium carbonate, as necessary coating a clear coating or a coloring ink on at least the information-printed area of the substrate, and identifying the information by the use of a CCD camera sensitive to infrared rays of 2-10 .mu.m wavelength or an infrared detector. No noise is generated even when the reflectance of a light from the substrate surface is large, and the information can be identified (read) easily.