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. 18, 2003
Filed:
Feb. 26, 2001
Hiroshi Ochi, Ehime, JP;
Shigetoshi Segawa, Ehime, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
Move, deformation, or damages of a green sheet can be securely prevented by improvement of the material and shape of a green sheet retainer affixed to a punching tool provided with a cutter section for punching a via hole on a ceramic green sheet . The sheet retainer of the present invention is composed of an elastic material with hardness between 50 to 60 degrees, and comprises: a support portion disposed on one end in the axial direction with a relatively large outer diameter, thick-walled in the radial direction, and engageable in the punching tool ; a contact portion disposed on the other end in the axial direction with a relatively small outer diameter, thin-walled in the radial direction, and comes in contact with the green sheet ; and a housing hole axially extending from the contact portion for housing the cutter section