US3972467A
Expired / Lapsed
US
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Paper-board laminate
Assignee: International Paper Co
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Filing: 1974-08-06
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Granted: 1976-08-03
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Expires: 1994-08-06
Abstract
Abstract An improved paperboard laminate for containers for bulk packaging liquids, syrups and pastes, which includes a layer of a high strength polymer film and which also may include a layer of aluminum foil.
Inventors
- 👤 Allan A. Whillock
- 👤 James Wesley Yount
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:17
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/10; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/088; B32B15/20; B32B27/08; B32B27/18; B32B27/24; B32B27/32; B32B27/34; D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/824; B32B2307/00; B32B2307/50; B32B2307/54; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2311/00; B32B2311/24; B32B2317/00; B32B2317/12; B32B2323/00; B32B2323/04; B32B2377/00; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31779; Y10T428/31783; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31993
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
109 words
A laminate comprising: a layer of a paperboard base stock; a first layer of a thermoplastic material having a thickness of greater than about 0.0005 inches bonded to said layer of paperboard base stock; a layer of a polymer film having a thickness of between about 0.0003 inches and 0.0015 inches bonded to said layer of paperboard base stock, said polymer film having a tensile strength at the yield point greater than about 4000 p.s.i. and an elongation at fracture greater than about 200%; and a second layer of a thermoplastic material having a thickness of greater than about 0.0005 inches bonded to said layer of a polymer film.
Claim 2
Dependent Claim
109 words
A laminate comprising: a layer of a paperboard base stock; a first layer of a thermoplastic material having a thickness of greater than about 0.0005 inches bonded to said layer of paperboard base stock; a layer of a polymer film having a thickness of between about 0.0003 inches and 0.0015 inches bonded to said layer of paperboard base stock, said polymer film having a tensile strength at the yield point greater than about 4000 p.s.i. and an elongation at fracture greater than about 200%; and a second layer of a thermoplastic material having a thickness of greater than about 0.0005 inches bonded to said layer of a polymer film.
Claim 3
Dependent Claim
13 words
The laminate of claim 1 wherein said polymer film is a nylon film.
Claim 4
Dependent Claim
67 words
The laminate of claim 2 wherein said first and second layers of a thermoplastic material have a thickness of from about 0.0005 to about 0.0020 inches; said nylon film has a thickness of about 0.0004 to about 0.0010 inches; and said paperboard base stock has a thickness of about 0.010 to about 0.030 inches and a basis weight of about 150 to about 400 pounds/3000 sq. ft.
Claim 5
Dependent Claim
30 words
The laminate of claim 3 wherein said layer of a nylon film is bonded to said layer of a paperboard base stock with a laminating layer of a thermoplastic material.
Claim 6
Dependent Claim
22 words
The laminate of claim 4 wherein said laminating layer comprises a polyolefin having a thickness of about 0.0003 to about 0.002 inches.
Claim 7
Dependent Claim
38 words
The laminate of claim 5 wherein said nylon film is coated on one surface with saran and electrostatically treated on the other surface to promote adhesion of said other surface of said nylon film to a polyolefin layer.
Claim 8
Dependent Claim
33 words
The laminate of claim 6 wherein said saran coated surface of said nylon is treated with an ethylene-acrylic acid copolymer to promote adhesion of said surface to a surface of a polyolefin layer.
Claim 9
Dependent Claim
14 words
The laminate of claim 1 wherein said laminate includes a layer of aluminum foil.
Claim 10
Dependent Claim
40 words
The laminate of claim 3 wherein said laminate includes a layer of aluminum foil having a thickness of about 0.00025 inches to about 0.001 inches between said layer of a nylon film and said second layer of a thermoplastic material.
Claim 11
Dependent Claim
25 words
The laminate of claim 9 wherein said layer of aluminum foil is bonded to said nylon film with a laminating layer of a thermoplastic material.
Claim 12
Dependent Claim
21 words
The laminate of claim 10 wherein said laminating layer comprises a polyolefin having a thickness of about 0.0003 to 0.0020 inches.
Claim 13
Dependent Claim
18 words
The laminate of claim 3 wherein said first layer and said second layer of thermoplastic material are polyethylene.
Claim 14
Dependent Claim
18 words
The laminate of claim 9 wherein said first layer and said second layer of thermoplastic material are polyethylene.
Claim 15
Dependent Claim
19 words
The laminate of claim 2 wherein said nylon film is a polycaprolactam coated on a surface with polyvinylidene chloride.
Claim 16
Dependent Claim
112 words
The laminate of claim 2, for a container, which comprises: a first layer of polyethylene having a thickness of about 0.00075 inches; a layer of a paperboard base stock of about 0.010 to about 0.030 inches thickness and a basis weight of about 150 to about 400 pounds/3000 sq. ft., bonded to said first layer; a laminating layer of polyethylene, bonded to said layer of paperboard base stock, having a thickness of about 0.0010 inches; a layer of a nylon film, having a thickness of about 0.0006 inches, bonded to said laminating layer; and a second layer of polyethylene, bonded to said nylon film and having a thickness of about 0.0015 inches.
Claim 17
Dependent Claim
43 words
The laminate of claim 15 wherein said laminate is for a one gallon size container and said paperboard base stock has a thickness of about 0.024 to about 0.028 inches and a basis weight of about 300 to about 335 pounds/3000 sq. ft.
Claim 18
Dependent Claim
27 words
The laminate of claim 16 wherein said paperboard base stock has a thickness of about 0.026 inches and a basis weight of about 327 pounds/3000 sq. ft.
Claim 19
Dependent Claim
149 words
The laminate of claim 9, for a container, which comprises: a first layer of polyethylene having a thickness of about 0.00075 inches; a layer of a paperboard base stock of about 0.010 to about 0.030 inches thickness and a basis weight of about 150 to about 400 pounds/3000 sq. ft., bonded to said first layer; a first laminating layer of polyethylene, bonded to said layer of paperboard base stock, having a thickness of about 0.0010 inches; a layer of a nylon film, having a thickness of about 0.0006 inches, bonded to said laminating layer; a second laminating layer of polyethylene, bonded to said nylon film and having a thickness of about 0.0010 inches; a layer of aluminum foil having a thickness of about 0.00035 inches bonded to said second laminating layer; and a second layer of polyethylene, bonded to said aluminum foil, having a thickness of about 0.0015 inches.
Claim 20
Dependent Claim
42 words
The laminate of claim 18 wherein said laminate is for a one gallon size container and said paperboard base stock has a thickness of about 0.024 to about 0.028 inches and a base weight of about 300 to 335 pounds/3000 sq. ft.
Claim 21
Dependent Claim
25 words
The laminate of claim 19 wherein said paperboard has a thickness of about 0.026 inches and a basis weight of about 327 pounds/3000 sq. ft.
Claim 22
Dependent Claim
123 words
In a thermoplastic-coated, paperboard container, suitable for liquids, pastes and syrups, an improved paperboard laminate material which comprises: a first layer of a thermoplastic material having a thickness of greater than about 0.0005 inches; a layer of a paperboard base stock, bonded to said first thermoplastic layer; a layer of a polymer film having a thickness of between about 0.0003 inches and 0.0015 inches bonded to said layer of a paperboard base stock, said polymer film having a tensile strength at the yield point greater than about 4000 p.s.i. and an elongation at fracture greater than about 200%; and a second layer of a thermoplastic material, having a thickness of greater than about 0.0005 inches bonded to said layer of a polymer film.
Claim 23
Dependent Claim
123 words
In a thermoplastic-coated, paperboard container, suitable for liquids, pastes and syrups, an improved paperboard laminate material which comprises: a first layer of a thermoplastic material having a thickness of greater than about 0.0005 inches; a layer of a paperboard base stock, bonded to said first thermoplastic layer; a layer of a polymer film having a thickness of between about 0.0003 inches and 0.0015 inches bonded to said layer of a paperboard base stock, said polymer film having a tensile strength at the yield point greater than about 4000 p.s.i. and an elongation at fracture greater than about 200%; and a second layer of a thermoplastic material, having a thickness of greater than about 0.0005 inches bonded to said layer of a polymer film.
Claim 24
Dependent Claim
13 words
The container of claim 21 wherein said polymer film is a nylon film.
Claim 25
Dependent Claim
66 words
The container of claim 22 wherein said first and said second layers of thermoplastic material have a thickness of about 0.0005 to about 0.0020 inches; said nylon film has a thickness of about 0.0004 to about 0.0010 inches; and said paperboard base stock has a thickness of about 0.010 to about 0.030 inches and a basis weight of about 150 to about 400 pounds/3000 sq. ft.
Claim 26
Dependent Claim
17 words
The container of claim 21 wherein said improved paperboard laminate material includes a layer of aluminum foil.
Claim 27
Dependent Claim
41 words
The container of claim 23 wherein said improved paperboard laminate includes a layer of aluminum foil, having a thickness of about 0.00025 to about 0.001 inches, between said layer of a nylon film and said second layer of a thermoplastic material.
Claim 28
Dependent Claim
19 words
The container of claim 22 wherein said nylon film is a polycaprolactam coated on a surface with polyvinylidene chloride.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |