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:
Apr. 17, 2001
Filed:
Jun. 08, 1999
Hiroshi Shindou, Tokyo, JP;
Tetsuo Abe, Tokyo, JP;
Akio Ogawa, Tokyo, JP;
Tsugihiro Hasebe, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
An apparatus for lapping a workpiece including a plurality of magnetic heads supported by a tool is disclosed. The lapping apparatus comprises a rotary lapping table, a lapping head attachment frame, an adjuster ring resiliently supported by the frame, a lapping head attached to the adjuster ring, a tilting assembly attached to the lapping head, and an up and down movable back plate pivotally attached to the lapping head. The apparatus further comprises first actuators or cylinders for correcting balance by applying forces on right and left sides of the pivotal point of the back plate, and second actuators or cylinders for correcting bow of the workpiece by applying operating forces on a plurality of predetermined locations of the tool so that the moving directions of movable parts of the second actuator means are substantially parallel with the directions of the operating forces.