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:
Sep. 23, 1997
Filed:
Feb. 16, 1995
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A disc cartridge has a casing having first and second apertures and first and second shutters slidably mounted to the casing for selectively opening and closing the first and second apertures. First and second shutter openers are respectively connected to the first and second shutters. Only the first aperture is opened using the first shutter opener when the disc cartridge is loaded in a standard specifications or existing recording and/or reproducing apparatus. When the disc cartridge is loaded in an optional specifications apparatus, both the first and second shutter openers are used to open the first and second apertures, respectively. A disc cartridge compatible with both new plural head recording and reproducing apparatuses and existing single head recording and reproducing apparatuses is thus provided while offering improved resistance to penetration of dust and other foreign matter into the casing by opening only the aperture(s) required for head insertion.