Patent ID: 7093639
Filing Date: 2006-08-22
Classification: B29C,B29L,B31B,Y10T

Abstract:
1. A device for cutting and sealing a film web, the film web having at least two layers, the device comprising: a cylindrical roller that rotates in a first circumferential direction about an axis, the roller having a surface, and further having a circumferential opening in the surface; an arcuate sealing/cutting element within the roller opening and projecting above the roller surface, whereby the sealing/cutting element contacts a film web being carried by the roller, wherein the sealing/cutting element is heated, wherein the sealing/cutting element lies in a plane perpendicular to the roller axis and remains fixed in position when the roller rotates, wherein the sealing/cutting element projects radially beyond the surface of the roller, and wherein the sealing/cutting element has at least a first radius that projects a first distance beyond the roller surface for a first portion of the element, and at least a second radius, greater than the first radius, that projects a second distance beyond the roller surface for a second portion of the element.