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:
Sep. 11, 2012
Filed:
Aug. 02, 2005
Keiji Hayashi, Osaka, JP;
Kazuhito Okumura, Osaka, JP;
Yoshikazu Tanaka, Osaka, JP;
Hideo Hara, Kanagawa, JP;
Toru Inamasu, Kanagawa, JP;
Keiji Hayashi, Osaka, JP;
Kazuhito Okumura, Osaka, JP;
Yoshikazu Tanaka, Osaka, JP;
Hideo Hara, Kanagawa, JP;
Toru Inamasu, Kanagawa, JP;
Nitto Denko Corporation, Osaka, JP;
Abstract
A work subject material comprising a metal plate for use in punching and/or bending and, attached thereto, a surface protection sheet, characterized in that the surface protection sheet comprises a support base material and an adhesive layer superimposed on one surface of the support base material and that the surface protection sheet exhibits a coefficient (I) not more than 21.0, a coefficient (II) not less than 4.0 and a coefficient (III) not more than 1.5, which are calculated by the following formulae: (I)=thickness of support base material (mm)×elongation at break of surface protection sheet (%); (II)=thickness of support base material (mm)×strength at break of surface protection sheet (N/20 mm); and (III)=coefficient (I)/coefficient (II).