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:
Jan. 28, 2003
Filed:
Jan. 29, 2001
Shuichi Kikuchi, Miyagi, JP;
Rie Izu, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A disc cartridge can effectively prevent dirt particles from entering the cartridge main body and improve the reliability of the operation of signal recording/reproduction on the disc-shaped recording medium. The disc cartridge comprises a cartridge main body and a shutter member having an upper shutter section and a lower shutter section adapted to openably close the recording/reproduction opening and the drive opening arranged outside the cartridge main body . A shutter cover is arranged on the main surface of the cartridge main body to cover the area of displacement of the lower shutter section . The shutter cover is provided with an opening slightly smaller than the lower shutter section of the shutter member at a position corresponding to the recording/reproduction opening and the drive opening