Title: Deeply embossed sheet product and method and apparatus for the production thereof

Abstract: A method of deep embossing of sheet material, generally metal, is disclosed. A small scale relief pattern is first embossed across the entire sheet and thereafter a deep embossment of spaced-apart protuberances is imparted to the sheet. Both patterns in combination produce a sheet useful for reflective thermal insulation without the risk of significantly puncturing the sheet.

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Inventors: Oser, Nathan (Perrineville, NJ, US)
Niedzinski, Edmund John (Somerville, NJ, US)

Application Number: 735642
Filing Date: 1976-10-26
Publication_date: 1977-09-13
Assignee: Johns-Manville Corporation (Denver, CO)
Primary Class(es): 72/185 72/187, 72/379.2, 425/335, 428/687
Other Classes:
US Patent Ref:

969460	Sep, 1910	Chartener	72/187.
1571594	Feb, 1926	Lorenz	425/336.
1941783	Jan, 1934	Bahr	425/335.
2290608	Jul, 1942	Evans	72/187.
2857825	Oct, 1958	Duncan et al.	425/335.

Other Refs:
Primary Examiner: Larson, Lowell A.
Assistant Examiner:
Attorney: Krone; Robert M., Kelly; Joseph J., McClain; James W.