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:
Nov. 09, 1999
Filed:
Apr. 25, 1997
Vladimir Schwartz, Concord, MA (US);
Other;
Abstract
A digital versatile disc ('DVD') for storing digital or digitized information that includes two sub-discs. Each sub disc has an outer peripheral edge, a top surface, a bottom surface, and a bore having a second peripheral edge. The two sub-discs are bonded together by a layer of dry film adhesive which is in contact with the bottom surface of the first sub disc and the top surface of the second sub-disc. The layer of dry film adhesive is spaced a distance from the second peripheral edges of the bores of the sub-discs. A weld located along the peripheral edges of the bores of the sub-discs provides bonding and structural support to the DVD. A hub or central area which is substantially free of any dry film adhesive is located between the weld and the layer of dry film adhesive. The use of a dry film adhesive to bond the component parts of the DVD eliminates many of the deficiencies of hot-melt and UV-curable adhesive bonding methods, particularly the problem of entrapping in the adhesive.