Patent ID: 8746489

Claim:
A container, comprising: a metal sidewall having an upper rim and a welded seam extending to the upper rim, wherein the upper rim includes an integrally formed heat seal zone having an upwardly inclined portion with an incline that is steeper than a maximum angle of a foil lid when the foil lid is fully expanded under pressure; a food-contact polymer coating applied on the upper rim and the sidewall except at the welded seam, such that the food-contact polymer coating has edges adjacent to the welded seam; and a coating system formed from a heat sealable thermoplastic powder comprising particles having a mean particle size ranging between 20 and 150 microns, which compositionally include an acid-modified polypropylene or a blend of an acid-modified polypropylene with (i) one or more polyester polymers, (ii) one or more epoxy or phenoxy resins, or (iii) blends of (i) and (ii), the coating system including: a first coating applied to the heat seal zone of the upper rim after the upper rim has been formed, such that the applied first coating covers the food-contact polymer coating at the upper rim; a second coating applied to the sidewall along the welded seam, such that the applied second coating covers the welded seam and the edges of the food-contact polymer coating.