US4755403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective patch for shrinkable bag
Assignee: Cryovac LLC
•
Filing: 1987-04-10
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Granted: 1988-07-05
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Expires: 2007-04-10
Abstract
Abstract Disclosed is a protective patch for a biaxially heat shrinkable, thermoplastic vacuum bag for protecting the bag from puncture by sharp protruding bones in bone-in cuts of meat which are vacuum packaged within the bags. The patch is made from multi-layer film and comprises a layer of linear low density polyethylene and a layer of ethylene vinyl acetate copolymer. The patch is biaxially heat shrinkable and shrinks with the bag. A method of making the patch is also disclosed.
Inventors
- 👤 Daniel J. Ferguson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:25
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/30; B32B27/306; B65; B65D; B65D75/00; B65D75/002; B65D75/004; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; B32B2323/00; B32B2323/04; B32B2323/046; B32B2331/00; B32B2331/04; B32B2439/00; B32B2439/70; B65D2275/00; B65D2275/02; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
68 words
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising: (I) an outer layer comprising a linear low density polethylene; (II) an inner layer comprising an ethylene-vinyl acetate copolymer; (III) said patch being biaxially heat shrinkable, and being adhered to said bag; (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
Claim 2
Dependent Claim
68 words
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising: (I) an outer layer comprising a linear low density polethylene; (II) an inner layer comprising an ethylene-vinyl acetate copolymer; (III) said patch being biaxially heat shrinkable, and being adhered to said bag; (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
Claim 3
Dependent Claim
30 words
The patch-bag combination of claim 1, wherein the patch material has been cross-linked by irradiation to the equivalent of a dosage level in the range between 4.5 to 13 MR.
Claim 4
Dependent Claim
26 words
The patch-bag combination of claim 2, wherein the patch material has been cross-linked by irradiation to a dosage in the range from 6 to 8 MR.
Claim 5
Dependent Claim
31 words
The patch-bag combination of claim 3 wherein the patch comprises four layers, the outer layers comprising the material of layer (I) and the inner layers comprising the material of layer (II).
Claim 6
Dependent Claim
55 words
The patch-bag combination of claim 4, wherein the material of layer (I) comprises 87% by weight linear low density polyethylene blended with 10% by weight ethylene-vinyl acetate copolymer having 9% by weight vinyl acetate content and 3% by weight pigments and additives, and layer (II) comprises ethylene-vinyl acetate copolymer having 28% by weight vinyl acetate.
Claim 7
Dependent Claim
18 words
The patch-bag combination of claim 5, wherein the patch is adhered to a biaxially shrinkable, thermoplastic vacuum bag.
Claim 8
Dependent Claim
39 words
The patch-bag combination according to claim 1, wherein (I) the outer layer comprises a blend of: (a) linear low density polyethylene, and (b) a second ethylene-vinyl acetate copolymer, and (II) the inner layer comprises a first ethylene-vinyl acetate copolymer.
Claim 9
Dependent Claim
76 words
The patch-bag combination according to claim 7, wherein (I) the outer layer comprises a blend of a major amount by weight of the linear low density polyethylene and a minor amount by weight of the second ethylene-vinyl acetate copolymer, wherein said second ethylene-vinyl acetate has a vinyl acetate content in the range from 7% to 12% by weight; and (II) the inner layer first ethylene-vinyl acetate copolymer has 20% to 35% by weight vinyl acetate content.
Claim 10
Dependent Claim
30 words
The patch-bag combination of claim 8, wherein the patch material has been cross-linked by irradiation to the equivalent of a dosage level in the range between 4.5 to 13 MR.
Claim 11
Dependent Claim
26 words
The patch-bag combination of claim 9, wherein the patch material has been cross-linked by irradiation to a dosage in the range from 6 to 8 MR.
Claim 12
Dependent Claim
31 words
The patch-bag combination of claim 10, wherein the patch comprises four layers, the outer layers comprising the material of layer (I) and the inner layers comprising the material of layer (II).
Claim 13
Dependent Claim
55 words
The patch-bag combination of claim 11, wherein the material of layer (I) comprises 87% by weight linear low density polyethylene blended with 10% by weight ethylene-vinyl acetate copolymer having 9% by weight vinyl acetate content and 3% by weight pigments and additives, and layer (II) comprises ethylene-vinyl acetate copolymer having 28% by weight vinyl acetate.
Claim 14
Dependent Claim
18 words
The patch-bag combination of claim 12, wherein the patch is adhered to a biaxially shrinkable, thermoplastic vacuum bag.
Claim 15
Dependent Claim
80 words
The patch-bag combination according to claim 1, wherein (I) the outer layer comprises a blend of: (a) a major amount by weight of linear low density polyethylene; (b) a minor amount by weight of an ethylene-vinyl acetate having a vinyl acetate content in the range from 7% to 12% by weight; and (c) up to 5% by weight pigments and additives; and (II) the inner layer comprises an ethylene-vinyl acetate copolymer having 20% to 35% by weight vinyl acetate content.
Claim 16
Dependent Claim
30 words
The patch-bag combination of claim 14, wherein the patch material has been cross-linked by irradiation to the equivalent of a dosage level in the range between 4.5 to 13 MR.
Claim 17
Dependent Claim
26 words
The patch-bag combination of claim 15, wherein the patch material has been cross-linked by irradiation to a dosage in the range from 6 to 8 MR.
Claim 18
Dependent Claim
31 words
The patch-bag combination of claim 16, wherein the patch comprises four layers, the outer layers comprising the material of layer (I) and the inner layers comprising the material of layer (II).
Claim 19
Dependent Claim
55 words
The patch-bag combination of claim 17, wherein the material of layer (I) comprises 87% by weight linear low density polyethylene blended with 10% by weight ethylene-vinyl acetate copolymer having 9% by weight vinyl acetate content and 3% by weight pigments and additives, and layer (II) comprises ethylene-vinyl acetate copolymer having 28% by weight vinyl acetate.
Claim 20
Dependent Claim
18 words
The patch-bag combination of claim 18, wherein the patch is adhered to a biaxially shrinkable, thermoplastic vacuum bag.
Claim 21
Dependent Claim
77 words
The patch-bag combination according to claim 1, wherein: (I) the outer layer comprises a blend of: (a) 80% to 100% by weight linear low density polyethylene; (b) 20% to 0% by weight ethylene-vinyl acetate having a vinyl acetate content in the range from 7% to 12% by weight and (c) 5% to 0% by weight pigments and additives; (II) the inner layer comprises an ethylene-vinyl acetate copolymer haivng 20% to 35 % by weight vinyl acetate content.
Claim 22
Dependent Claim
30 words
The patch-bag combination of claim 20, wherein the patch material has been cross-linked by irradiation to the equivalent of a dosage level in the range between 4.5 to 13 MR.
Claim 23
Dependent Claim
26 words
The patch-bag combination of claim 21, wherein the patch material has been cross-linked by irradiation to a dosage in the range from 6 to 8 MR.
Claim 24
Dependent Claim
31 words
The patch-bag combination of claim 22, wherein the patch comprises four layers, the outer layers comprising the material of layer (I) and the inner layers comprising the material of layer (II).
Claim 25
Dependent Claim
55 words
The patch-bag combination of claim 23, wherein the material of layer (I) comprises 87% by weight linear low density polyethylene blended with 10% by weight ethylene-vinyl acetate copolymer having 9% by weight vinyl acetate content and 3% by weight pigments and additives, and layer (II) comprises ethylene-vinyl acetate copolymer having 28% by weight vinyl acetate.
Claim 26
Dependent Claim
18 words
The patch-bag combination of claim 24, wherein the patch is adhered to a biaxially shrinkable, thermoplastic vacuum bag.
Claim 27
Dependent Claim
117 words
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising: (I) an outer layer comprising a blend of: (a) 80% to 100% by weight linear low density polyethylene; (b) 20% to 0% by weight ethylene-vinyl acetate having a vinyl acetate content in the range from 7% to 12% by weight and (c) 5% to 0% by weight pigments and additives; (II) an inner layer comprising an ethylene-vinyl acetate copolymer having 20% to 35% by weight vinyl acetate content; (III) said patch being biaxially heat shrinkable, and being adhered to said bag, (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
Claim 28
Dependent Claim
117 words
A protective multi-layer patch in combination with a biaxially heat shrinkable bag, said patch comprising: (I) an outer layer comprising a blend of: (a) 80% to 100% by weight linear low density polyethylene; (b) 20% to 0% by weight ethylene-vinyl acetate having a vinyl acetate content in the range from 7% to 12% by weight and (c) 5% to 0% by weight pigments and additives; (II) an inner layer comprising an ethylene-vinyl acetate copolymer having 20% to 35% by weight vinyl acetate content; (III) said patch being biaxially heat shrinkable, and being adhered to said bag, (IV) wherein said patch will shrink with the bag, thereby reducing the tendency of the patch to delaminate from the bag.
Claim 29
Dependent Claim
30 words
The patch-bag combination of claim 26, wherein the patch material has been cross-linked by irradiation to the equivalent of a dosage level in the range between 4.5 to 13 MR.
Claim 30
Dependent Claim
26 words
The patch-bag combination of claim 27, wherein the patch material has been cross-linked by irradiation to a dosage in the range from 6 to 8 MR.
Claim 31
Dependent Claim
31 words
The patch-bag combination of claim 28, wherein the patch comprises four layers, the outer layers comprising the material of layer (I) and the inner layers comprising the material of layer (II).
Claim 32
Dependent Claim
55 words
The patch-bag combination of claim 29, wherein the material of layer (I) comprises 87% by weight linear low density polyethylene blended with 10% by weight ethylene-vinyl acetate copolymer having 9% by weight vinyl acetate content and 3% by weight pigments and additives, and layer (II) comprises ethylene-vinyl acetate copolymer having 28% by weight vinyl acetate.
Claim 33
Dependent Claim
18 words
The patch-bag combination of claim 30, wherein the patch is adhered to a biaxially shrinkable, thermoplastic vacuum bag.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |