Abstract A package having, for example, a parallelepipedic configuration is formed from a tube of laminated packaging material which is obtained by folding a web of the material so that opposite edge portions of the web overlap and form a longitudinally extending joint. The laminated packaging material consists of a base layer of paper or cardboard and facing layers of thermoplastic material, and the cut edge of the material which rests against the inside of the package is prevented from coming into contact with the contents of the package by application of a protective strip thereto along the joint zone, this strip being a laminate consisting of a base layer coated on both sides with a thermoplastic material which is sealed to the inside thermoplastic layer of the package. The base layer of the protective strip has a higher softening temperature than that of the inside thermoplastic layer of the packaging material.
Inventors
👤 Olof Stark
👤 Rolf Dilot
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-29 20:47
CPC Classifications
B; B65; B65D; B65D3/00; B65D3/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
In a filled package of the type which is manufactured from a material web of laminated material comprising a base layer of paper or cardboard which is coated at least on the inside with a heat-sealable polyethylene material and which material web is formed into an end closable tube in which the longitudinal edge zones of the web are heat sealed together in overlapping relation, the improvement in which the longitudinal joint on the inside of the package is covered by a strip of a laminated material consisting of a base layer of polyamide having a higher softening temperature than the polyethylene on the inside of the package, both sides of said strip base layer being coated with polyethylene, one side of which is heat sealed to the polyethylene coating on the inside of the package along the longitudinal joint.
Claim 2
Dependent Claim
140 words
In a filled package of the type which is manufactured from a material web of laminated material comprising a base layer of paper or cardboard which is coated at least on the inside with a heat-sealable polyethylene material and which material web is formed into an end closable tube in which the longitudinal edge zones of the web are heat sealed together in overlapping relation, the improvement in which the longitudinal joint on the inside of the package is covered by a strip of a laminated material consisting of a base layer of polyamide having a higher softening temperature than the polyethylene on the inside of the package, both sides of said strip base layer being coated with polyethylene, one side of which is heat sealed to the polyethylene coating on the inside of the package along the longitudinal joint.