Collapsable tube

Details Collapsable tube Collapsable tube

1973-01-15

1976-05-25

Reeves, Robert B.

Dispensing

Collapsible wall-type container

Nonmetallic

B65D 3510

Patent

active

039587215

ABSTRACT:
A collapsable tube of synthetic resin materials and adapted to prevent oxidization of the substance contained therein. The body of the tube is constructed of a laminated sheet which, in one embodiment, comprises a polyethylene film an oriented polypropylene film, a polyvinyl alcohol film and a polyethylene film in the order named. Due to the provision of the polyvinyl alcohol film the sheet has an extremely low permeability to oxygen gas and odour and is highly resistant to oil. The oriented polypropylene film provides for the sheet increased rigidity as well as improved printability. A non-return valve is provided at the tube orifice in order to prevent the entrance of air thereinto thus causing substantially no oxidization of the substance contained.

REFERENCES:
patent: 2430046 (1947-11-01), Dreyfus
patent: 3172571 (1965-03-01), Marchak
patent: 3178065 (1965-04-01), Averswald
patent: 3179300 (1965-04-01), Davidson et al.
patent: 3347419 (1967-10-01), Brandt et al.
patent: 3381818 (1968-05-01), Cope et al.
patent: 3505143 (1970-04-01), Haas et al.
E. I. DuPont de Nemours & Company, "Elvanol Polyvinyl Alcohol," Mar. 13, 1950.
Handbook of Plastics; Simonds, Weith, and Bigelow; Jan. 1949; pp. 64-67, 70-71, 77-78, 427-429.

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