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:
Mar. 12, 1991
Filed:
Jul. 20, 1990
Applicant:
Inventors:
Phillip L Coduti, Munster, IN (US);
Louis McDaniel, Lansing, IL (US);
Assignee:
Inland Steel Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B / ; B21B / ;
U.S. Cl.
CPC ...
428340 ; 72 41 ; 72 42 ; 252 / ; 252 / ; 228457 ; 228467 ;
Abstract
A coil of pre-lubed steel strip has a steel strip substrate coated on each surface with a uniform coating of solid lubricant. The coating has a coating weight greater than 20 mg/ft..sup.2 (0.22 g/m.sup.2) for lubricity during cold deforming of the strip, as by stamping or drawing. The coating weight is less than 100 mg/ft..sup.2 (1.08 g/m.sup.2) to prevent slippage during operations incident to blanking of the strip prior to cold deforming. The coating has a needle penetration hardness in the range 9-250. Various procedures for applying the coating are described.