US4004727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminate for the manufacture of liquid-tight packing containers and a blank for packing containers manufactured from the laminate
Assignee: Individual
•
Filing: 1975-12-15
•
Granted: 1977-01-25
•
Expires: 1995-12-15
Abstract
Abstract For forming rigid packing containers for liquids, the invention provides a laminate which comprises layers of cellular structure and layers of homogeneous structure, the cellular layers being composed of foamed plastics and the homogeneous layers being either plastic, metal foil, glass fibers or paper, and arranged between the layers of foamed plastics.
Inventors
- 👤 Ruben Anders Rausing
- 👤 Ingemar Wilhelm Ohlsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:36
CPC Classifications
B; B32; B32B; B32B27/00; B32B5/00; B32B5/18; B32B15/00; B32B15/04; B32B15/08; B32B27/06; B32B27/08; B32B27/10; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D5/00; B65D5/02; B65D5/12; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2439/00; B32B2439/40; B32B2439/62; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/24; Y10T428/24777; Y10T428/249921; Y10T428/249953; Y10T428/249975; Y10T428/249981; Y10T428/249987; Y10T428/24999
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
132 words
A blank of carton-forming material for manufacturing containers said blank comprising a laminate having two layers of polystyrene foam in which the cellular structure has lenticular shaped cells created by stretching the polystyrene foam when being initially extruded to form the layers and an intermediate layer disposed between and adhered to said polystyrene foam layers, said intermediate layer being dimensionally stable and provided with at least one cut-out portion adjacent at least one edge of the blank, whereby when the blank is erected to form a container the polystyrene foam layers may be heated in the area of the at least one cut-out portion in the intermediate layer so as to shrink the foam layers to provide inwardly folded portions forming at least one part of the container made from the blank.
Claim 2
Dependent Claim
132 words
A blank of carton-forming material for manufacturing containers said blank comprising a laminate having two layers of polystyrene foam in which the cellular structure has lenticular shaped cells created by stretching the polystyrene foam when being initially extruded to form the layers and an intermediate layer disposed between and adhered to said polystyrene foam layers, said intermediate layer being dimensionally stable and provided with at least one cut-out portion adjacent at least one edge of the blank, whereby when the blank is erected to form a container the polystyrene foam layers may be heated in the area of the at least one cut-out portion in the intermediate layer so as to shrink the foam layers to provide inwardly folded portions forming at least one part of the container made from the blank.
Claim 3
Dependent Claim
27 words
A blank as claimed in claim 1 wherein the thickness of the intermediate layer is not more than 10% of the thickness of the polystyrene foam layers.
Claim 4
Dependent Claim
29 words
A blank as claimed in claim 1 and further comprising a gas impermeable layer disposed on that side of the blank which will form the inside of the container.
Claim 5
Dependent Claim
17 words
A blank as claimed in claim 1 wherein the two polystyrene foam layers have the same thickness.
Claim 6
Dependent Claim
16 words
A blank as claimed in claim 1 wherein the layers of polystyrene foam have different thicknesses.
Claim 7
Dependent Claim
36 words
A blank as claimed in claim 1 wherein the cut-out portions in the intermediate layer are located adjacent an edge of the blank which when erected to form a container forms the bottom of the container.
Claim 8
Dependent Claim
32 words
A blank as claimed in claim 1 wherein those portions of the blank forming the side walls of the erected container have substantially continuous layers of foamed polystyrene and the intermediate layer.
Claim 9
Dependent Claim
49 words
A packing container formed from a blank as claimed in claim 1 wherein the inwardly folded heat-shrunk portions of the blank constitute the bottom of the container and further comprising a flat closure member sealed to the inwardly folded portion to close and seal the bottom of the container.
References Cited (Backward Citations)
US1943757A
Cited
US2589045A
Cited
US2715089A
Cited
US3143364A
Cited
US3070281A
Cited
US3207651A
Cited
US3391823A
Cited
US3531367A
Cited
US3400810A
Cited
US3706622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |