Anti-curling foil manufacturing process

Package making – Methods – Forming or partial forming a receptacle and subsequent filling

Reexamination Certificate

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C053S559000, C053S140000

Reexamination Certificate



A process for manufacturing a foil package from foil laminate sheet stock. The foil laminate has a top foil sheet and a bottom polymeric sheet laminated to the foil sheet. A cavity is molded into the bottom foil sheet, wherein the cavity has a bottom, a depth and a periphery, such that all of the periphery is substantially arcuate at any horizontal cross-section along the depth of the cavity. The top planar sheet is heat sealed to the bottom molded sheet. The molding process substantially reduces or eliminates curling.

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