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. 16, 1979
Filed:
Mar. 20, 1978
Yoshitada Mima, Tachikawa, JP;
Youji Kanno, Koganei, JP;
Nobuo Sato, Yokohama, JP;
Yasuhiko Hara, Yokohama, JP;
Yosiaki Tomita, Kodaira, JP;
Takuro Karakawa, Tokyo, JP;
Masahiro Miyamoto, Urawa, JP;
Toshitaka Kano, Tokyo, JP;
Hitachi, Ltd., ALL OF, JP;
Sapporo Breweries Ltd., ALL OF, JP;
Hitachi Denshi Kabushiki Kaisha, ALL OF, JP;
Abstract
An apparatus of the invention for inspecting bottles for detecting flaws or contamination in the bottles relies upon the light converging function performed by one open-sided elliptic cylinder having reflective inner surface and two foci. The point or line to be inspected of the bottle is positioned at one of the two foci, while at least one light receiving element is disposed at the other focus. A beam of light is applied to the point or line to be inspected of the bottle, so that, if there is any defect such as flaw or contamination, the light is reflected irregularly by the bottle in indefinite direction. The irregularly reflected fractions of light are reflected by the inner surface of the elliptic cylinder and converge on the light receiving element disposed at the other focus, so as to be effectively received by the same element. the presence of the defect, if any, is detected from the output of the light receiving element. Another light receiving element may be disposed outside of the elliptic cylinder so as to receive the fraction of light passed through the bottle.