US4530869A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat pack and process for the preparation of a heat pack
Assignee: Individual
•
Filing: 1983-08-26
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Granted: 1985-07-23
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Expires: 2003-08-26
Abstract
Abstract A heat pack and a process for its preparation are described wherein the heat pack comprises an earth-like mass between two outer layers surrounding the mass and the two outer layers are joined together by means of holding fibers uniformly distributed over their entire surface area. The joining of the three layers may be effected by a needle bonding process known in the needle tufting process of the textile industry. Webs of the three-layer system needle bonded in this manner are cut into pieces according to their application, thereby forming the heat packs as such, and packaged into foil bags in which the heat packs may be stored and heated.
Inventors
- 👤 Gunter H. Tesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:19
CPC Classifications
A; A61; A61F; A61F7/00; A61F7/02; A61F2007/0098; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T428/00; Y10T428/23; Y10T428/231; Y10T428/237; Y10T428/238; Y10T428/24; Y10T428/24628; Y10T428/31504; Y10T428/31801; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/656; Y10T442/659; Y10T442/666; Y10T442/667
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
49 words
A heat pack comprising an inner layer located between two outer layers, the inner layer comprising an earth-like mass and a melting mass of wax and at least one of the outer layers comprising an actively needle bondable fiber fleece, said layers connected together by means of holding fibers.
Claim 2
Dependent Claim
49 words
A heat pack comprising an inner layer located between two outer layers, the inner layer comprising an earth-like mass and a melting mass of wax and at least one of the outer layers comprising an actively needle bondable fiber fleece, said layers connected together by means of holding fibers.
Claim 3
Dependent Claim
17 words
A heat pack according to claim 1 wherein the three layers are needle bonded to each other.
Claim 4
Dependent Claim
26 words
A heat pack according to claim 1 wherein the earth-like mass is mud, fango, clay or medicinal earth and is present essentially in the dried form.
Claim 5
Dependent Claim
21 words
A heat pack according to claim 1 wherein the melting mass is a synthetic or natural hydrocarbon wax or mixtures thereof.
Claim 6
Dependent Claim
27 words
A heat pack according to claim 1 wherein the inner layer comprises 30-70% by weight of the earth-like mass and 70-30% by weight of the melt1ng mass.
Claim 7
Dependent Claim
23 words
A heat pack according to claim 1 wherein the inner layer is present in a unit weight amount of 3-30 kg/m 2 .
Claim 8
Dependent Claim
23 words
A heat pack according to claim 1 wherein the inner layer contains active ingredients, such as medicinal herbs, oils, sulfur or vegetable extracts.
Claim 9
Dependent Claim
21 words
A heat pack according to claim 1 wherein the said fiber fleece has a unit weight of 20-350 g/m 2 .
Claim 10
Dependent Claim
28 words
A heat pack according to claim 1 wherein the other outer layer also comprises a fiber fleece and has a unit weight preferably of 100-180 g/m 2 .
Claim 11
Dependent Claim
15 words
A heat pack according to claim 1 wherein the second outer layer comprises a foil.
Claim 12
Dependent Claim
13 words
A heat pack according to claim 10 wherein the foil is aluminum foil.
Claim 13
Dependent Claim
14 words
A heat pack according to claim 10, wherein the foil is a stepped foil.
Claim 14
Dependent Claim
30 words
A heat pack according to claim 1, wherein the holding fibers are provided with a surface density such that the earth-like mass and the melting mass are prevented from shifting.
Claim 15
Dependent Claim
38 words
A heat pack according to claim 1, wherein the holding fibers are drawing the two outer layers toward each other, so that they are applying pressure to the inner layer of the earth-like mass and the melting mass.
Claim 16
Dependent Claim
26 words
A heat pack according to claim 1, wherein the three-layer system has a lesser thickness at its circumferential borders than at a distance from said borders.
Claim 17
Dependent Claim
16 words
A heat pack according to claim 1, wherein the earth-like mass is present in granular form.
Claim 18
Dependent Claim
18 words
A heat pack according to claim 1, wherein the earth-like mass is present essentially in a dried form.
Claim 19
Dependent Claim
17 words
A heat pack according to claim 1, wherein the melting mass is present in the granular form.
Claim 20
Dependent Claim
25 words
A heat pack according to claim 1, wherein the melting mass is present in the form of a continuous layer penetrated by the holding fibers.
Claim 21
Dependent Claim
17 words
A heat pack according to claim 19, wherein the earth-like mass is embedded in the melting mass.
Claim 22
Dependent Claim
51 words
A heat pack according to claim 1, wherein the pack formed by the two outer layers and the inner layer of the earth-like mass and the melting mass are arranged between two gas and liquid tight foils and that said foils are joined together at their borders in a sealed manner.
Claim 23
Dependent Claim
16 words
A heat pack according to claim 21, wherein a vacuum is present between the two foils.
Claim 24
Dependent Claim
68 words
A process for the preparation of a heat pack according to claim 1, wherein a layer of an earth-like mass and a melting mass of wax is placed between two flat layers at least one of the outer layers comprising an actively needle bondable fleece, and that the two layers surrounding the inner layer are joined with each other by means of holding fibers through the inner layer.
Claim 25
Dependent Claim
21 words
A process according to claim 23, wherein the two outer layers are needle bonded to each other through the inner layer.
Claim 26
Dependent Claim
42 words
A process according to claim 23, wherein the three layers joined together by means of holding fibers are divided into flat pieces to form a pack and the pack obtained in this manner is packaged between two gas and water tight sheets.
Claim 27
Dependent Claim
38 words
A process according to claim 25, wherein the division into pieces according to application is effected by means of hot tools and the three layers are compressed simultaneously, directly adjacent to the cutting line, mechanically against each other.
Claim 28
Dependent Claim
16 words
A process according to claim 25, wherein the pack is vacuum packaged between the two sheets.
Claim 29
Dependent Claim
13 words
A heat pack according to claim 4, wherein the melting mass is paraffin.
Claim 30
Dependent Claim
13 words
A heat pack according to claim 5, wherein the mixing ratio is 1:1.
Claim 31
Dependent Claim
22 words
A heat pack according to claim 6, wherein the inner layer is present in a unit weight amount of 8-15kg/m 2 .
Claim 32
Dependent Claim
21 words
A heat pack according to claim 8, wherein the fiber fleece has a unit weight ratio of 100-180 g/m 2 .
Claim 33
Dependent Claim
18 words
A heat pack according to claim 10, wherein the foil has a unit weight of 50-200g/m 2 .
Claim 34
Dependent Claim
44 words
A heat pack according to claim 1, wherein at least one outer layer is permeable to at least liquids and the proportion of the earth-like mass is higher in the vicinity of said outer layer than in the vicinity of the other outer layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-22 | 1989-01-21 | 1989-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-22 | 1993-01-21 | 1993-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-22 | 1997-01-21 | 1997-07-23 | $7700.00 | Window Closed / Lapsed |