US4464850A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoe insert
Assignee: Carl Freudenberg KG
•
Filing: 1982-07-08
•
Granted: 1984-08-14
•
Expires: 2002-07-08
Abstract
Abstract A shoe insert of a cross-linked polyolefin body foamed with closed pores or cells and having a fiber layer arranged on one or both surfaces, the fiber layer consisting of fibers and/or filaments which are distributed over the surfaces in a pattern and which at least partially penetrate the polyolefin body.
Inventors
- 👤 Heinrich Ebert
- 👤 Manfred Noe
- 👤 Kurt Wind
- 👤 Gunter Bitsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
A; A43; A43B; A43B17/00; A43B17/14
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
109 words
In a shoe insert consisting of a cross-linked polyolefin body foamed in a closed cell arrangement, and wherein a fiber layer is arranged at least on one surface of said body which will be in contact with the sole of the foot, the improvement comprising providing said fiber layer with hydrophilic fibers and/or filaments which are distributed on said surface in a pattern and which at least in part extend through the polyolefin body and have ends freely protruding through the underside of the body, said ends abutting an adhered layer of absorptive material, whereby moisture may be transferred between said surface layer and said layer of absorptive material.
Claim 2
Dependent Claim
109 words
In a shoe insert consisting of a cross-linked polyolefin body foamed in a closed cell arrangement, and wherein a fiber layer is arranged at least on one surface of said body which will be in contact with the sole of the foot, the improvement comprising providing said fiber layer with hydrophilic fibers and/or filaments which are distributed on said surface in a pattern and which at least in part extend through the polyolefin body and have ends freely protruding through the underside of the body, said ends abutting an adhered layer of absorptive material, whereby moisture may be transferred between said surface layer and said layer of absorptive material.
Claim 3
Dependent Claim
22 words
The shoe insert according to claim 1 wherein said fiber layer consists of fibers and/or filament ends which are not connected together.
Claim 4
Dependent Claim
40 words
The shoe insert according to claim 1 wherein said fiber layer consists of a member selected from the group consisting of a woven fabric or fabric material, a knit fabric or fabric material and a nonwoven fabric or fabric material.
Claim 5
Dependent Claim
17 words
The shoe insert according to claim 1 wherein said fibers or filaments consist of cotton or cellulose.
Claim 6
Dependent Claim
21 words
The shoe insert according to claim 3 wherein said fiber layer contains synthetically produced fibers or filaments having high springback elasticity.
Claim 7
Dependent Claim
14 words
The shoe insert according to claim 5 wherein said fibers or filaments are wrinkled.
Claim 8
Dependent Claim
28 words
The shoe insert according to claim 1 wherein said fiber layer contains fibers and/or filaments selected from the group consisting of metallic mineral and glass fibers and/or filaments.
Claim 9
Dependent Claim
17 words
The shoe insert according to claim 1 wherein said fiber layer contains an organic or inorganic powder.
Claim 10
Dependent Claim
26 words
The shoe insert according to claim 8 wherein said powder is selected from the group consisting of activated carbon, talcum, barium sulfate, aluminum and silicon dioxide.
Claim 11
Dependent Claim
21 words
The shoe insert according to claim 1 wherein said fibers or filaments have a regularly recurring small distance from each other.
Claim 12
Dependent Claim
38 words
The shoe insert according to claim 10 wherein the smallest spacing of two fibers or filaments is at least as large as three-times the fiber or filament thickness, and not larger than the thickness of said polyolefin body.
Claim 13
Dependent Claim
24 words
The shoe insert according to claim 1 wherein said fiber or filament ends are cemented or welded to a surface of said polyolefin body.
Claim 14
Dependent Claim
35 words
The shoe insert according to claim 1 wherein said absorptive layer consists of a member selected from the group consisting of an artificial or natural leather, an open-pore foam material, a fiber layer, and cellulose.
Claim 15
Dependent Claim
23 words
The shoe insert according to claim 1 wherein said polyolefin body has a bulk weight of about 20 to 220 kg/m 3 .
Claim 16
Dependent Claim
32 words
The shoe insert according to claim 1 wherein the surface of the polyolefin body which will be in contact with the sole of the foot fits the shape of the human foot.
Claim 17
Dependent Claim
20 words
The shoe insert according to claim 1 wherein said polyolefin body consists of a cross-linked polyethylene foamed with closed pores.
Claim 18
Dependent Claim
20 words
The shoe insert according to claim 1 wherein said polyolefin body consists of a cross-linked polypropylene foamed with closed pores.
Claim 19
Dependent Claim
25 words
The shoe insert according to claim 1 wherein said polyolefin body consists of a cross-linked copolymer of polyethylene and polypropylene material foamed with closed pores.
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) | 1987-08-14 | 1988-02-13 | 1988-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-14 | 1992-02-13 | 1992-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-14 | 1996-02-13 | 1996-08-14 | $7700.00 | Window Closed / Lapsed |