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. 07, 1999
Filed:
Mar. 20, 1997
Shigemi Asai, Nara, JP;
Tohru Okuda, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
Featured is a magnetic drum assembly including a rotary drum supporting a magnetic head for recording/reproducing information on a magnetic tape and a stationary drum secured to a base of a magnetic recording/reproducing device. In one aspect of the invention, the stationary drum is molded from a resin material together with a metal material partially embedded and partially exposed and being secured at the exposed part of the metal to the base of the magnetic recording/ reproducing device. In another aspect of the invention, the rotary drum is molded from a resin material together with a metal material partially embedded and partially exposed and the magnetic head is secured at the exposed part of the metal of the rotary drum. Such a drum assembly is advantageous in that it is capable of maintaining an initial accuracy of its sizes and shape without deterioration in its mechanical properties over time due to creep deformation and internal stress.