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. 23, 1991
Filed:
Dec. 08, 1989
Katsuhisa Aizawa, Saitama, JP;
Osami Hayashi, Saitama, JP;
Shin-Etsu Polymer Co., Ltd., Tokyo, JP;
Abstract
The invention provides an efficient method for the preparation of a plastic-made computer-operating card having an emboss-worked relief pattern on the surface by adhesively bonding an emboss-worked plastic-made covering sheet to a body of the card. In the inventive method, a sheet for covering is lined with a second sheet on the back surface and the laminate is emboss-worked so that the debris of the second sheet fills up the cavity formed behind the relief pattern in the first sheet followed by peeling off the undeformed portion of the second sheet leaving the debris filling the cavity. Since the cavity behind the emboss-worked relief pattern is filled up with the debris of the second sheet, the emboss-worked covering sheet is safe from the troubles of collapsing or flattening in the subsequent step of adhesive bonding thereof to the body of the card.