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:
Jan. 17, 1989
Filed:
Sep. 01, 1987
Shuji Hamada, Yokohama, JP;
Niigata Engineering Co., Ltd., Tokyo, JP;
Abstract
There are provided a sandblasting apparatus and a method for processing a workpiece which has a first surface to be processed adjacent to a second surface not to be processed. The apparatus includes a masking device for masking the second surface and an abrasive blowing device for causing abrasive grains to impinge against the workpiece to process the first surface. The masking device includes a masking tape, an intermittent tape traveling device for causing the masking tape to travel to index a portion of the masking tape in the vicinity of the workpiece intermittently, and an urging device for bringing the portion of the masking tape into contact with the second surface of the workpiece to cover the same.