Finished metal sheet with removable protective covering and...

Details Finished metal sheet with removable protective covering and... Finished metal sheet with removable protective covering and...

B - Operations, Transporting

32

B

154/71.03

B32B 15/08 (2006.01) B29C 27/02 (1980.01) B29C 27/30 (1980.01)

Patent

CA 1052681

ABSTRACT OF THE DISCLOSURE The finished surface of a metal sheet is protected with a removable film of thermoplastic material bonded to the finished surface along a grid-like pattern of lines that form hermetic seals for a plurality of discrete gas pockets between the finished metal surface and the film. The product is formed by preheating the metal to bonding temperature, by then bringing a discrete film of thermoplastic material into contact with the finished surface, and by pressing the film against the heated metal sur- face with a resilient pattern of ridges to form the aforesaid pattern of seal lines.

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