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:
Aug. 19, 2003
Filed:
Sep. 27, 2001
Satoru Takaha, Mito, JP;
Yasufumi Hashimoto, Hitachinaka, JP;
Victor Company of Japan Ltd., Kanagawa-Ken, JP;
Abstract
A magnetic tape cassette for use in an apparatus having a light source and a light sensor ( ) for detecting a tape end by the difference of light transmittance of a tape. The magnetic tape cassette ( ) is composed of a cassette housing for having a transparent or semi-transparent upper half ( ) and a lower half ( ), and the reel being connected with the tape, and a light exit ( A, B) being opposed to the light sensor ( ) when the tape cassette is loaded to a predetermined position in the apparatus, for passing light from the light source to the light sensor through the light exit, wherein a light path ( ) of the light emitted from the light source crosses a travel path of the tape, a light-shielding member ( ) for limiting the light emitted from the light source, placed contiguous to the light exit, and a rib ( ) being formed in the upper half and the lower half ( ) wherein a plurality of triangular shaped prisms ( ) is formed serially on at least one side of the rib ( ).