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:
Dec. 13, 1988
Filed:
Sep. 04, 1986
Sigeo Sasaki, Kyoto, JP;
Hitachi Maxell, Ltd., Osaka, JP;
Abstract
A tape cartridge which comprises a cartridge case made of a complex plastic material made of polyolefin resin, mixed with a filler of 45 percent to 65 percent by weight of the plastic material wherein the filler includes particles made of at least one of calcium carbonate and barium sulfate. The tape cartridge has a dynamic loss of more than 1.times.10.sup.9 dyne/cm.sup.2 within a range of oscillation frequency of 0.1 Hz to 1000 Hz. Accordingly, the tape cartridge of the present invention can prevent a running tape arranged in the tape cartridge from oscillating since outside oscillation is attenuated in the tape cartridge. Also the tape cartridge can reduce modulation noise which occurs because of the outside oscillation.