Patent ID: 7455744
Filing Date: 2008-11-25
Classification: A47C,A61G

Abstract:
1. A method of manufacturing an inflatable air cushion, said method comprising the steps of: forming a generally longitudinally continuous cushion precursor stock of a substantially airtight material, said stock including a series of longitudinally spaced laterally extending support tubes each having two lateral ends and an interior, a pair of longitudinally extending side tubes each adjacent to a respective set of said lateral ends of said support tubes, and each being generally co-planar with said support tubes; cutting said precursor stock at a location suitable for the length of the inflatable cushion; sealing longitudinal ends of the said side tubes so that air does not escape therefrom when the cushion is inflated; and wherein said precursor stock is formed to include a first passage structure defining a first continuous longitudinally extending passage in the stock communicating with an interior of some of said support tubes, and a second passage structure defining a second continuous longitudinally extending passage in the stock communicating with others of said support tubes.