Sections successively severed from a double layer web of synthetic thermoplastic film, e.g., flattened tube stock, as produced are each stacked and welded to a precedingly stacked section near one edge of a tear off pat or hanger portion to which a bag portion of the section is attached; forming ultimately...http://www.google.com/patents/US3966524?utm_source=gb-gplus-sharePatent US3966524 - Method and apparatus for manufacture of pad-stacked bags
