US4897295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Food stuffs casing
Assignee: Naturin Werk Becker and Co
•
Filing: 1986-12-08
•
Granted: 1990-01-30
•
Expires: 2006-12-08
Abstract
Abstract PCT No. PCT/EP86/00721 Sec. 371 Date Aug. 6, 1987 Sec. 102(e) Date Aug. 6, 1987 PCT Filed Dec. 8, 1986 PCT Pub. No. WO87/03452 PCT Pub. Date Jun. 18, 1987.A food stuff casing is disclosed, in particular for packing and casing hot packed food stuffs or those that are heated after packing, containing at least one polyamide, which can absorb at leasat 5% of its own weight in water prior to saturation, characterized in that the food stuffs casing contains at least 5%-wt water, no tightening lubricating agent, and no moisture retention agent.
Inventors
- 👤 Gayyur Erk
- 👤 Joachim Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:17
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013; A22C2013/0063; Y; Y10; Y10S; Y10S206/00; Y10S206/802; Y10S206/811; Y10T; Y10T428/00; Y10T428/13; Y10T428/1324; Y10T428/1334; Y10T428/1345; Y10T428/23; Y10T428/239; Y10T428/26; Y10T428/269; Y10T428/31504; Y10T428/31725
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
156 words
A food stuff casing packed in a moisture-proof packing and formed at least in part of at least one polyamide having absorbed at least 5% of its own weight in water and containing no tightening lubricating agent, and no moisture retaining agent, the food stuff casing having the following physical characteristics: (a) ready for filling, tightened, and moistened, it has a minimum burst force of 8.0 kg and a corresponding minimum burst path of 8.5 mm, measured in accordance with DIN 53 325; (b) the slope of the line of burst path over burst force determined by the spherical pressure test (DIN 53 325) amounts to 0.17-1.3 (kg/mm); (c) the friction value determined according to DIN 53 375 of the food stuffs casing as opposed to a PUR-elastomer having a Shore-A hardness of 95 amounts to at least 30. (d) the casing withstands a minimum of 800 strokes without rupture, when subject to the scrub test.
Claim 2
Dependent Claim
156 words
A food stuff casing packed in a moisture-proof packing and formed at least in part of at least one polyamide having absorbed at least 5% of its own weight in water and containing no tightening lubricating agent, and no moisture retaining agent, the food stuff casing having the following physical characteristics: (a) ready for filling, tightened, and moistened, it has a minimum burst force of 8.0 kg and a corresponding minimum burst path of 8.5 mm, measured in accordance with DIN 53 325; (b) the slope of the line of burst path over burst force determined by the spherical pressure test (DIN 53 325) amounts to 0.17-1.3 (kg/mm); (c) the friction value determined according to DIN 53 375 of the food stuffs casing as opposed to a PUR-elastomer having a Shore-A hardness of 95 amounts to at least 30. (d) the casing withstands a minimum of 800 strokes without rupture, when subject to the scrub test.
Claim 3
Dependent Claim
14 words
A food stuffs casing according to claim 1, characterized by a water content 6-13%-wt.
Claim 4
Dependent Claim
24 words
A food stuffs casing according to claim 1, characterized in that its water content corresponds to the saturation content of the polyamide casing material.
Claim 5
Dependent Claim
25 words
A food stuffs casing according to claim 1, characterized in that its water content amounts to greater than 80% of its saturation concentration for water.
Claim 6
Dependent Claim
40 words
A food stuffs casing according to claim 1, characterized in that it contains polycaprolactam, polyhexamethylene adipamide, mixtures of polycaprolactam and polyhexamethylene adipamide and/or copolyamides of caprolactam, hexamethylene diamine, and adipinic acid or consists of these polyamides, and mixtures or copolyamides.
Claim 7
Dependent Claim
34 words
A food stuffs casing according to claim 1, characterized in that it consists of a mixture of 50-99%-wt of the polyamides and 1-50%-wt of at least one ionomer resin and/or a modified ethylene-vinylacetate copolymer.
Claim 8
Dependent Claim
31 words
A food stuffs casing according to claim 1, characterized in that polyamide content has a crystallinity of greater than 50%-vol corresponding to a density of greater than 1.14 g/cm 3 .
Claim 9
Dependent Claim
21 words
A food stuffs casing according to claim 1, characterized in that it consists of a polyamide which is crystallized in alpha-form.
Claim 10
Dependent Claim
26 words
A food stuffs casing according to claim 1, characterized in that it can be filled at a maximum diameter variation that is smaller than ±1.5 mm.
Claim 11
Dependent Claim
17 words
A food stuffs casing according to claim 1, characterized in that it is of a single layer.
Claim 12
Dependent Claim
14 words
A food stuffs casing according to claim 1, characterized in that it is seamless.
Claim 13
Dependent Claim
30 words
A food stuffs casing according to claim 1, characterized in that in the tightened form it is available as a section, tied off at one end, or as a roll.
Claim 14
Dependent Claim
28 words
A food stuffs casing according to claim 1, characterized in that it is either straight or curved in the manner of a ring or part of a ring.
Claim 15
Dependent Claim
18 words
A food stuffs casing according to claim 1, characterized by a wall thickness of 0.025 to 0.100 mm.
Claim 16
Dependent Claim
18 words
A food stuffs casing according to claim 1, characterized by a bursting strength of at least 0.7 bar.
Claim 17
Dependent Claim
42 words
A process for the production of a packed food stuffs casing according to claim 1, characterized in that the casing is moistened up to the point of achieving a minimum water content of 5%, and is then packed into a moisture-proof packing.
Claim 18
Dependent Claim
16 words
A process according to claim 16, characterized in that moisturization is carried out with drinking water.
Claim 19
Dependent Claim
15 words
A process according to claim 16, characterized in that the casing was moisturized from outside.
Claim 20
Dependent Claim
16 words
A process according to claim 16, characterized in that the inside of the casing is moisturized.
Claim 21
Dependent Claim
44 words
A process according to claim 16, characterized in that after being treated with water and prior to further processing such as make-up, the casing is stored at room temperature for approximately one hour to assure the homogenous distribution of the water within the casing.
Claim 22
Dependent Claim
24 words
A process according to claim 16, characterized in that after the water absorption, the casing is tightened until the polyamide is concentrated in equilibrium.
Claim 23
Dependent Claim
42 words
A process according to claim 16, characterized in that after the absorption of water, the casing is cut into sections and these are closed off at least at one end with thread and/or a metal clip until the concentration is in equilibrium.
Claim 24
Dependent Claim
18 words
A process according to claim 16, wherein the casing is moistened up to achieving its saturation water content.
Claim 25
Dependent Claim
23 words
A process according to claim 18, wherein the casing is moisturized from the outside by storing the casing for 30-60 minutes in water.
Claim 26
Dependent Claim
23 words
A process according to claim 19, wherein the inside of the casing is moisturized by a quantity of water retained within the casing.
Claim 27
Dependent Claim
14 words
A food stuffs casing according to claim 2, wherein the water content is 7-11%-wt.
Claim 28
Dependent Claim
23 words
A food stuffs casing according to claim 4, wherein the water content amounts to more than 95% of its saturation concentration for water.
Claim 29
Dependent Claim
23 words
A food stuffs casing according to claim 27, wherein the water content amounts to more than 99% of its saturation concentration for water.
References Cited (Backward Citations)
US4303711A
Cited
DE3227945A1
Cited
US4601929A
Cited
US4528225A
Cited
US4487231A
Cited
EP0139888A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-29 | 1993-07-31 | 1994-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-29 | 1997-07-31 | 1998-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-29 | 2001-07-31 | 2002-01-30 | $7700.00 | Window Closed / Lapsed |