Patent ID: 6605169
Filing Date: 2003-08-12
Classification: B29C,B29L,B31D,B32B,B65D,Y10T

Abstract:
A method of making air-filled packing cushions from a web of preconfigured film material having a longitudinally extending inflation channel, a plurality of inflatable chambers communicating with the inflation channel through laterally extending inlet ports on one side of the channel, and a series of longitudinally spaced outlet ports on the side of the inflation channel opposite the inlet ports, comprising the steps of: advancing a web of the preconfigured film material along a path, inflating the chambers through the inflation channel as the film material advances along the path, passing the film material about the periphery of a sealing roller and in direct sliding contact with a heated sealing element to seal the inlet ports closed, and relieving pressure in the inflation channel through the outlet ports while the film material is in engagement with the periphery of the sealing roller.