In the construction of a collapsible receptacle there is provided a length of fabric material and a length of webbing material formed from the same material as the length of fabric material. A plurality of lift loops formed from length of webbing material are positioned at spaced points along the length...http://www.google.es/patents/US4479243?utm_source=gb-gplus-sharePatente US4479243 - Collapsible receptacle with prefabricated lift loops and method of making
Collapsible receptacle with prefabricated lift loops and method of making
