Patent ID: 7402033
Filing Date: 2008-07-22
Classification: B29C,Y10S

Abstract:
1. An apparatus for flame-perforating film, comprising: a frame; a support surface attached to the frame, wherein the support surface includes a plurality of lowered portions; a burner attached to the frame opposite the support surface, wherein the burner supports a flame; a preheat roll attached to the frame adjacent the support surface, wherein the preheat roll includes an outer surface, and wherein the outer surface of the preheat roll is heated pre-heating the film prior to the burner; a backing roll attached to the frame, wherein the backing roll includes the support surface; a temperature-controlled shield attached to the frame adjacent the backing roll, wherein the temperature-controlled shield is positioned between the burner and the preheat roll; a burner pipe connected to the burner; and an oxygen-enrichment system connected to the burner pipe.