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:
Jul. 21, 1992
Filed:
Feb. 04, 1991
James A Eggebeen, San Diego, CA (US);
Balramkrishna L Talwar, San Clemente, CA (US);
William Y Cheung, Boston, MA (US);
Gigatek Memory Systems Limited Partnership, La Costa, CA (US);
Abstract
A highly durable, usually hydrolytically stable, drive belt for belt-driven tape cartridges is disclosed which is a thin continuous flexible loop of at least one polyetherurethane (preferably non-hygroscopic), which is both durable and strong. Preferably the belt will be composed of a composite of two separate polyetherurethane materials, one having a higher molecular weight and longer polymer chain length than the other. Also preferably, these two polyetherurethane materials will be blended to a homogenous mixture by melting both materials and blend the molten material and forming the belt from the resulting polymeric mixture. Optionally a single polyetherurethane polymer may be used as the material comprising the belt if that single material has the requisite properties of flexibility and durability.