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. 19, 2000
Filed:
Nov. 12, 1998
Kenichi Ohno, Tokyo, JP;
Masashige Mitsuhashi, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The invention provides an apparatus and a method for forming the end surface of a coaxial composite member consisting of a cylindrical member and an axial member, in which the axial member is ground more readily than the cylindrical member, being capable of forming the end surface of the coaxial member into a convexed spherical mirror surface with high precision, without recession of the axial member from the formed spherical surface. The apparatus for forming the end surface of a coaxial composite member comprises a grinding table having a circularly recessed guide surface, a winding motor for running a grinding tape across the circularly recessed guide surface, a pressing member for pressing the coaxial composite member on the grinding tape to be then contacted with the circularly recessed guide surface, and a rotating motor for providing the coaxial composite member on the grinding tape with rotative movement on its axis and reciprocative movement in the direction orthogonal to the running direction of the grinding tape, wherein the recessed guide surface in provided with a recess or a member having lower hardness than that of the material for the recessed guide surface, on the median line thereof.