Inventors:
Chad R. Sandstrom - Stillwater MN
Douglas R. Plourde - Somerset WI
Dean E. Sitz - Wahpeton ND
Donald J. Kerfeld - St. Paul MN
John R. Johnson - Woodbury MN
Assignee:
Imation Corp. - Oakdale MN
International Classification:
B29D 1100
US Classification:
425143, 425190, 425547, 425810
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.