Patent ID: 6955846
Filing Date: 2005-10-18
Classification: B29C,B29K,B29L,B31D,B65D,Y10T

Abstract:
1. A web for the manufacture of fluid filled units comprising: a) an elongate heat sealable, flattened plastic tube comprised of face and back layers including imperforate sections; b) the layers being imperforately joined together at spaced side edges, each such joining being by a selected one of a fold and a seal; c) the layers including superposed longitudinally disposed lines of weakness disposed generally transversely midway between the side edges and between opposite sets of said sections; d) the tube having longitudinally spaced, pairs of transverse seals, each transverse seal extends from a respective side edge and terminates in a spaced relationship with the longitudinal lines of weakness; e) at least some of the transverse seals respectively including transverse lines of weakness extending from one side edge to the other generally centrally of each seal in a longitudinal direction; f) the side edges, transverse seals and lines of weakness together delineating two oppositely oriented strings of pouches with each pouch having two imperforate sections, three imperforate sides and a centrally located fill opening at its fourth side; and, g) characterized by the transverse lines of weakness being defined by spaced perforations extending through both layers with the perforations nearest to the longitudinal lines of weakness being shorter in length than the lengths of other perforations spaced further from the longitudinal lines, wherein the shorter perforations are on opposite sides of the longitudinal lines of weakness.