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US4421805A
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US
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Slip-resistant shipping sacks
Assignee: Mobil Oil AS
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Filing: 1982-04-29
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Granted: 1983-12-20
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Expires: 2002-04-29
Abstract
Abstract A shipping sack comprising an envelope of plastic film having at least one surface thereof at least partially coated with a thin layer of a slip-resistant polyamide resin.
Inventors
- 👤 Randolph D. Prader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:50
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/005; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/31504; Y10T428/31725; Y10T428/3175; Y10T428/31757
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
29 words
A product sack comprising an envelope of plastic film having at least one surface thereof at least partially coated with a thin layer of a slip-resistant thermoplastic polyamide resin.
Claim 2
Dependent Claim
29 words
A product sack comprising an envelope of plastic film having at least one surface thereof at least partially coated with a thin layer of a slip-resistant thermoplastic polyamide resin.
Claim 3
Dependent Claim
20 words
The sack of claim 1 wherein said polyamide is formed from dimerized fatty acids and one or more aliphatic polyamines.
Claim 4
Dependent Claim
13 words
The sack of claim 2 wherein said plastic film comprises a polyolefin film.
Claim 5
Dependent Claim
84 words
The sack of claim 3 wherein said film is a composite comprising a pair of co-extruded films having a heat-softenable inner layer, a plurality of machine-direction oriented fibers therebetween having a selected first denier and a selected first spacing therebetween, and a single transverse-direction fiber disposed as parallel reaches connected by 180° loops at each end, said parallel reaches having a selected second spacing therebetween, said loops being entirely enclosed by said pair of films, and said transverse-direction fiber having a selected second denier.
Claim 6
Dependent Claim
16 words
The sack of claim 4 wherein said films are of polyethylene and said fibers of polypropylene.
Claim 7
Dependent Claim
17 words
The sack of claim 5 wherein two opposite surfaces of said envelope are coated with said polyamide.
Claim 8
Dependent Claim
17 words
The sack of claim 1, wherein said thin layer consists essentially of said slip-resistant thermoplastic polyamide resin.
Claim 9
Independent Claim
41 words
A method of increasing the stabilization against motion of at least one loaded shipping sack relative to surfaces in contact therewith, comprising, applying to at least one surface of said shipping sack a thin layer of a slip-resistant thermoplastic polyamide resin.
Claim 10
Independent Claim
41 words
A method of increasing the stabilization against motion of at least one loaded shipping sack relative to surfaces in contact therewith, comprising, applying to at least one surface of said shipping sack a thin layer of a slip-resistant thermoplastic polyamide resin.
Claim 11
Dependent Claim
16 words
The method of claim 8 wherein said sack is comprised of an envelope of plastic film.
Claim 12
Dependent Claim
17 words
The method of claim 8, wherein said thin layer consists essentially of said slip-resistant thermoplastic polyamide resin.
References Cited (Backward Citations)
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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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |