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US 4,733,800 AGranted
Tube and a method and a device for manufacturing of the tube
AssigneeAB Akerlund & Rausing
InventorsCarl-Axel Bjorkengren, Lennart Mansson
Life of this patent
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Abstract
A packaging tube including a body formed from a laminate containing a metal foil and a plastic layer is provided with a strip also formed from a laminate incorporating a metal foil and a plastic film. The metal foil in the strip is thicker than the metal foil in the body laminate. The strip provides dead-fold characteristics. The strip may extend along a joint, such as a butt joint, in the tube body so that the strip covers the joint.
Claims14
A packaging tube, comprising:
- (a) a tubular body of a body laminate containing a metal foil and at least one layer of a plastics material superposed thereon, said tubular body having interior and exterior faces and defining a lengthwise direction;
- (b) a breast having a discharge opening secured to one end of said tubular body;
- and
- (c) an elongated strip of a strip laminate attached to said tubular body and extending generally in said lengthwise direction along said tubular body, said strip laminate including a metal foil and at least one layer of a plastics material superposed thereon, said strip having two oppositely-directed faces, one face of said strip confronting a face of said body, said strip having dead-fold characteristics, the width of said strip being less than the circumference of said tubular body,
- the thickness of the metal foil of the tubular body being within the interval 5 to 40 microns, the metal foil of the body being considerably thinner than the metal foil of the strip, the thickness of the metal foil of the strip being within the interval 40 to 200 microns.
2 more elements
A packaging tube, comprising:
- (a) a tubular body of a body laminate containing a metal foil and at least one layer of a plastics material superposed thereon, said tubular body having interior and exterior faces and defining a lengthwise direction;
- (b) a breast having a discharge opening secured to one end of said tubular body, and
- (c) an elongated strip of a strip laminate attached to said tubular body and extending generally in said lengthwise direction along said tubular body, said strip laminate including a metal foil and at least one layer of a plastics material superposed thereon, said strip having two oppositely-directed faces, one face of said strip confronting a face of said body, said strip having dead-fold characteristics, the width of said strip being less than the circumference of said tubular body, the metal foil of the body being considerably thinner than the metal foil of the strip.
Dependencies are inferred from the claim text.