EP0014272A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Parallelepipedic packaging container provided with an opening arrangement and method for the manufacture of such a container
Assignee: Tetra Pak AB
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Filing: 1979-12-17
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Granted: —
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Expires: 1999-12-17
Abstract
Abstract A parallelepipedic packing container of the type which is provided with a sealing fin which extends over the upper end wall of the packing container as well as over triangular, double-walled lugs adjoining this end wall. The sealing fin comprises a narrow sealing zone on the outer edge of the fin and a tearing perforation on the base line of the fin,the tearing perforation extending from the tip of one tnangular lug to a point on the end wall of the packing container. The sealing fin is unsealed in the area between the narrow sealing zone and the tearing perforation, and moreover a corresponding sealing fin arranged at the base of the packing container is appreciably narrower than the sealing fin wherein the tearing perforation is arranged
Inventors
- 👤 Sven Nils Hakan Holmström
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 14:54
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/064; B65D5/065; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/93; Y10S493/934
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
281 words
A parallelepipedic packing container of the type which comprises two flat sealing fins, which are constituted of layers of a packing material arranged against each other and which extend over each of two opposite end walls of the packing container and also over opposite triangular double-walled lugs adjoining each of the said end walls, each of the said sealing fins extending from the free tip of the one lug to the corresponding tip of the opposite lug, characterized in that one of the said sealing fins is substantially broader than the other sealing fin, that the said broader sealing fin has a narrow sealing zone which extends along the whole length of the fin and is located close to the outer part of the sealing fin, along which the thermoplastic layers of the packing material placed against each other in the sealing fin have been caused to fuse together to form a tight and durable sealing joint, that the said broader sealing fin has close to its base line or connecting line to the said end wall and triangular lugs a tearing perforation which penetrates through the outer layer of the packing material but not through its inner plastic layer, the tearing perforation being constituted of perforation lines in the packing material which are arranged so that on formation of the package they are located parallel with one another and opposite one another in the sealing fin, that the said tearing perforation extends from the tip of one triangular lug to a point on the central portion of the end wall, and that the said broader sealing fin is unsealed in the area between the sealing zones and the tearing perforation.
Claim 2
Dependent Claim
281 words
A parallelepipedic packing container of the type which comprises two flat sealing fins, which are constituted of layers of a packing material arranged against each other and which extend over each of two opposite end walls of the packing container and also over opposite triangular double-walled lugs adjoining each of the said end walls, each of the said sealing fins extending from the free tip of the one lug to the corresponding tip of the opposite lug, characterized in that one of the said sealing fins is substantially broader than the other sealing fin, that the said broader sealing fin has a narrow sealing zone which extends along the whole length of the fin and is located close to the outer part of the sealing fin, along which the thermoplastic layers of the packing material placed against each other in the sealing fin have been caused to fuse together to form a tight and durable sealing joint, that the said broader sealing fin has close to its base line or connecting line to the said end wall and triangular lugs a tearing perforation which penetrates through the outer layer of the packing material but not through its inner plastic layer, the tearing perforation being constituted of perforation lines in the packing material which are arranged so that on formation of the package they are located parallel with one another and opposite one another in the sealing fin, that the said tearing perforation extends from the tip of one triangular lug to a point on the central portion of the end wall, and that the said broader sealing fin is unsealed in the area between the sealing zones and the tearing perforation.
Claim 3
Dependent Claim
25 words
A parallelepipedic packing container in accordance with claim 1, characterized in that the said broader sealing fin is folded down against the adjoining end wall.
Claim 4
Dependent Claim
44 words
A parallelepipedic packing container in accordance with claim 1, characterized in that the length of the tearing perforation over the end wall of the packing container corresponds or slightly exceeds the length of the tearing perforation along the triangular lug adjoining the end wall.
Claim 5
Dependent Claim
39 words
A parallelepipedic packing container in accordance with claim 1, characterized in that the width of the broader sealing fin shall be greater than 3 times the width of the sealing zone located in the outer part of the fin.
Claim 6
Dependent Claim
27 words
A parallelepipedic packing container in accordance with claim 1, characterized in that the broader sealing fin is at least double the width of the narrower sealing fin.
Claim 7
Dependent Claim
157 words
A method for the manufacture of packing containers in accordance with claim 1, characterized in that a web of packing material comprising a carrier layer of paper and at least one thermoplastic coating layer is formed to a tube in that the longitudinal edges of the web are joined together to a longitudinal sealing joint, whereupon the said tube is filled with the intended contents and is divided into individual, closed packing containers by repeated flattenings and transverse seals in areas of the tube situated at a distance from one another, and is subjected thereafter to a forming process, the seals along each flattened area being constituted of two parallel narrow sealing zones situated close to each other, which are located asymmetrically in respect of the said flattened area, and that the individual packages are separated from the filled and sealed tube by means of cutting the material transversely in the area between the said sealing zones.
References Cited (Backward Citations)
No citation records indexed.
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