Patent ID: 7980849
Filing Date: 2011-07-19
Classification: B26F,Y10S,Y10T

Abstract:
1. An apparatus for flame-perforating film, comprising: a frame; a backing roll attached to the frame wherein the backing roll includes a support surface with a plurality of lowered portions; a nip roll attached to the frame adjacent the backing roll a burner attached to the frame opposite the support surface, wherein the burner supports a flame, and wherein the flame includes a flame tip opposite the burner; and a film contacting and wrapped around at least a portion of the support surface of the backing roll, wherein the film is between the nip roll and the backing roll, wherein the flame of the burner is in contact with the film, wherein the burner is positioned such that the distance between an unimpinged flame tip of the flame and the burner is at least one-third greater than the distance between the film and the burner.