Patent EP0353991A2 successfully refreshed from Google Patents.
EP0353991A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
A packing material and packing containers manufactured from the material
Assignee: Tetra Laval Holdings and Finance SA
•
Filing: 1989-08-01
•
Granted: —
•
Expires: 2009-08-01
Abstract
Abstract A flexible material in the form of sheets or of a web for the manufacture of a dimensionally rigid, liquid-tight packing container. The material comprises a carrier layer (5) consisting of mineral-filled thermoplastic material, preferably polypropylene, whose one side, preferably that facing towards the inside of the intended container, with the object of increasing the rigidity is provided with a relieflike surface pattern comprising a multitude of closely spaced ridges (6) crossing, or joined to, one another and delimiting deeper surface panels (7) in between.
Inventors
- 👤 Hans Rausing
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 06:53
CPC Classifications
B; B65; B65D; B65D5/00; B65D5/02; B65D5/06; B65D5/064; B65D5/40; B65D65/00; B65D65/38; Y; Y10; Y10S; Y10S229/00; Y10S229/93; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1355; Y10T428/15; Y10T428/24; Y10T428/2419; Y10T428/24355; Y10T428/24446; Y10T428/24479; Y10T428/24612; Y10T428/24777; Y10T428/25; Y10T428/258; Y10T428/26; Y10T428/266; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
55 words
A flexible packing material comprising a sheet or web (1) of deformable, heat-sealable, plastics material characterised in that the sheet or web is provided on at least one face by plastic deformation thereof with a relief pattern comprising a multitude of closely spaced depressions (7) and/or elevations to impart increased rigidity to the packing material.
Claim 2
Dependent Claim
55 words
A flexible packing material comprising a sheet or web (1) of deformable, heat-sealable, plastics material characterised in that the sheet or web is provided on at least one face by plastic deformation thereof with a relief pattern comprising a multitude of closely spaced depressions (7) and/or elevations to impart increased rigidity to the packing material.
Claim 3
Dependent Claim
22 words
A packing material as claimed in Claim 1, wherein the sheet or web has a thickness of from 200 to 800 µm.
Claim 4
Dependent Claim
34 words
A packing material as claimed in Claim 1 or Claim 2, wherein the relief pattern is interrupted or omitted in regions (8, 9) of the packing material to form narrow weakening zones facilitating folding.
Claim 5
Dependent Claim
46 words
A packing material as claimed in any preceding claim, wherein the relief pattern is interrupted or omitted in regions (3, 4) of the packing material to form plane longitudinal and transverse surface portions of the packing material which are intended to be sealed to one another.
Claim 6
Dependent Claim
28 words
A packing material as claimed in Claim 4, wherein the said transverse surface portions (4) lie in the same plane as the tops of the adjacent relief pattern.
Claim 7
Dependent Claim
25 words
A packing material as claimed in any preceding claim, wherein the relief pattern is formed by ridges (6) crossing one another or being mutually connected.
Claim 8
Dependent Claim
23 words
A packing material as claimed in Claim 6, wherein the ridges delimit surface panels (7) of lesser thickness and located between the ridges.
Claim 9
Dependent Claim
24 words
A packing material as claimed in Claim 7, wherein the said surface panels (7) are mutually identical or similar and of regular geometrical shape.
Claim 10
Dependent Claim
17 words
A packing material as claimed in any preceding claim, wherein plastics material is a mineral-filled thermoplastics material.
Claim 11
Dependent Claim
30 words
A packing material as claimed in Claim 9, wherein the mineral-filled thermoplastics is constituted of polypropylene homopolymer or copolymer containing between 50 to 80 percent calcium sulphate or calcium carbonate.
Claim 12
Dependent Claim
16 words
A packing material as claimed in Claim 10, wherein said percentage is from 65 to 70%.
Claim 13
Dependent Claim
34 words
A packing material as claimed in any preceding claim, wherein the packing material is a laminate in which said heat sealable, plastics material forms a carrier layer for one or more further layers (10).
Claim 14
Dependent Claim
41 words
A packing material as claimed in Claim 12, wherein the or a surface-patterned side of the carrier layer is covered by a layer (10) of a material with a high modulus of elasticity or small extensibility laminated to the carrier layer.
Claim 15
Dependent Claim
15 words
A packing material as claimed in Claim 13, wherein the said layer is of Al-foil.
Claim 16
Dependent Claim
21 words
A packing container or part thereof, manufactured from a packing material in accordance with any one of Claims 1 to 14.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.