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. 26, 2000
Filed:
Nov. 12, 1999
Koichi Nakagawa, Niigata-ken, JP;
Katsuya Sugai, Niigata-ken, JP;
Hideaki Kobayashi, Niigata-ken, JP;
Isao Nakabayashi, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
Employed is a crown forming method of forming a crown on a floating type magnetic head which includes the steps of placing an approximately rectangular-prism-shaped bar, which has magnetic head elements of not less than 1 formed on a side wall thereof in a row, on the convex surface of a jig whose radius of curvature is R.sub.1 through an elastic sheet while facing the upper surface (surface to be processed) of the bar to a lapping surface plate having a concave processing surface whose radius of curvature is R.sub.2 with the relationship between the radius of curvatures set to R.sub.1 .gtoreq.R.sub.2, deforming the bar to an arc shape along the longitudinal direction thereof and bonding it on the convex surface together with the elastic sheet, and lapping the upper surface (surface to be processed) by abutting it against the processing surface and moving the upper surface (surface to be processed) relative to a processing surface.