Coating processes – Heat decomposition of applied coating or base material
Reexamination Certificate
2007-03-27
2007-03-27
Wong, Edna (Department: 1753)
Coating processes
Heat decomposition of applied coating or base material
C427S209000, C427S327000, C427S331000, C427S374400, C427S398200, C427S298000, C427S409000, C205S196000, C205S197000, C205S130000, C205S137000, C205S140000, C205S142000, C205S154000, C205S156000, C413S001000
Reexamination Certificate
active
10913440
ABSTRACT:
A process is provided for making a composite work article suitable for fabricating rigid sheet metal can components. A steel sheet having first and second surfaces is pre-treated to enhance reception and retention of a multi-layer polymer coating on the pre-treated first surface. The multi-layer polymer coating is melt extruded on the pre-treated first surface and beyond opposite lateral edges of the work article to establish overhang portions, then solidified. The multi-layer polymeric coating has a tie polymeric layer contacting the pre-treated first surface, and a finish-surface polymeric layer. The solidified overhang portions are trimmed, and the extruded multi-layer polymeric coating is subjected to finish-treatment, involving heating the extruded multi-layer polymeric coating at least to a melt temperature thereof, then cooling the multi-layer polymeric coating through glass-transition temperature thereof at a sufficiently rapid rate to establish amorphous non-directional characteristics in the polymeric coating.
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Bailey Michael S.
Loen Mark V.
Sinsel John A.
Berenato White & Stavish
ISG Technologies, Inc
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