Patent ID: 6139481
Filing Date: 2000-10-31
Classification: B29C,B31B,F23D

Abstract:
In a cup sealing system comprising a cup former and at least one burner for sealing a cup bottom seam where a cup side wall blank is mated with a bottom disk, with one portion of the side wall extending beyond the bottom disk; an improvement wherein said at least one burner includes a burner head with a plurality of circumferentially arranged flame nozzles and a pilot flame aperture on said burner head, said pilot flame aperture adapted to be located axially adjacent said one portion of the cup side wall when said burner head is in a sealing position; a flame ignitor/sensor positioned radially adjacent the pilot flame aperture; and wherein in said sealing position a combustion chamber of the burner extends from a forward edge of the burner at said flame nozzles to a location axially beyond the cup side wall to thereby achieve uniform heating of the extended portion of the cup side wall.