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:
Oct. 19, 1982
Filed:
Sep. 02, 1980
Myron E Ullman, Jr, Canfield, OH (US);
Kessler Products Co., Inc., Youngstown, OH (US);
Abstract
An improved method of lubrication in a deep drawing process utilizes a plurality of distinct plastic sheets, loosely overlying one another, laid across at least one major surface of a flat blank to be drawn. In preferred practice, a pair of such distinct plastic sheets are laid across each of the opposed major surfaces of a flat blank in preparation for a drawing operation. The plastic sheets are maintained in position while interfitting drawing tools, namely a punch and a die, close together to effect drawing of the blank. The plastic sheets serve as a lubricant during the drawing process. Selected surfaces of the sheets or the material from which the sheets are formed may be provided with an additional conventional lubricating substance to enhance lubricity of the sheets, or conventional lubricant may be utilized between the sheets of each pair.