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:
Oct. 03, 2006
Filed:
May. 07, 2004
Chad R. Sandstrom, Stillwater, MN (US);
Douglas R. Plourde, Somerset, WI (US);
Dean E. Sitz, Wahpeton, ND (US);
Donald J. Kerfeld, St. Paul, MN (US);
John R. Johnson, Woodbury, MN (US);
Chad R. Sandstrom, Stillwater, MN (US);
Douglas R. Plourde, Somerset, WI (US);
Dean E. Sitz, Wahpeton, ND (US);
Donald J. Kerfeld, St. Paul, MN (US);
John R. Johnson, Woodbury, MN (US);
Imation Corp., Oakdale, MN (US);
Abstract
An optical disk exhibiting no detrimental thickness increase (edge wedge effect) that arises at the outer diameter of an optical disk substrate during an injection molding manufacturing process, and an apparatus and method for making such a disk. The optical disk of the present invention is designed for use with an optical disk player, especially where the data on the optical disk is stored air incident. This optical disk includes a disk substrate made from a molded polymeric material. The disk substrate has a first major surface, a second major surface, and an outer edge. The first major surface of the optical disk includes a data region having an intermediate portion and an outer portion. The outer portion extends to the outer edge of the optical disk. The disk substrate has a thickness defined by the distance between the first major surface and the second major surface. The optical disk also includes an information layer covering the data region. In the present invention, the thickness of the intermediate portion of the data region is substantially equal to the thickness of the outer portion of the data region such that the outer portion of the data region is capable of being used by the optical disk player.