US4814037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making shoes using a particular shoe stiffener
Assignee: DVSG Holding GmbH
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Filing: 1987-09-23
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Granted: 1989-03-21
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Expires: 2007-09-23
Abstract
Abstract The invention presents to the art a novel, improved shoe stiffener which comprises co-extruded layers of plastics film. The shoe stiffener comprises co-extruded layers of plastics film, a first of the layers comprising an ionomeric material and providing a main body of the stiffener and a second layer comprising a plastics material which does not adhere to a fusion press under conditions normally encountered therein during bonding of a shoe stiffener to a shoe upper. Nylon 6 is the preferred second layer plastics material. The co-extrusion product replaces fabric backed shoe stiffeners in which flaws induced in the film by the fabric may provide notches from which cracks in the material can propagate.
Inventors
- 👤 Brian Arnold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
A; A43; A43B; A43B23/00; A43B23/08; A43B23/081; A43B23/086; A43B23/087; A43B23/16; A43B23/17; B; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/305; B29C48/307; B29C48/78; B29C48/80; B29C48/83; B29K; B29K2033/00; B29K2033/04; B29K2077/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31507; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
147 words
In a method of making shoes wherein a shoe stiffener material is bonded to a shoe upper by a hot melt adhesive by positioning said shoe stiffener material and said shoe upper with said hot melt adhesive therebetween is a fusion press having two platens, one of which is heated to a temperature of approximately 180°-200° C., and pressing said platens together wherein the adhesive is heated and bonds the stiffener material to the shoe upper, the improvement which comprises: employing, as said shoe stiffener, a material comprising co-extruded non-fabric layers of plastic film, a first of the non-fabric layers comprising an ionomeric material and providing a main body of the stiffener, and a second of the non-fabric layers comprising a plastic material which does not adhere to said fusion press under the conditions normally encountered therein during bonding of a shoe stiffener to a shoe upper.
Claim 2
Dependent Claim
147 words
In a method of making shoes wherein a shoe stiffener material is bonded to a shoe upper by a hot melt adhesive by positioning said shoe stiffener material and said shoe upper with said hot melt adhesive therebetween is a fusion press having two platens, one of which is heated to a temperature of approximately 180°-200° C., and pressing said platens together wherein the adhesive is heated and bonds the stiffener material to the shoe upper, the improvement which comprises: employing, as said shoe stiffener, a material comprising co-extruded non-fabric layers of plastic film, a first of the non-fabric layers comprising an ionomeric material and providing a main body of the stiffener, and a second of the non-fabric layers comprising a plastic material which does not adhere to said fusion press under the conditions normally encountered therein during bonding of a shoe stiffener to a shoe upper.
Claim 3
Dependent Claim
21 words
The method according to claim 1 wherein the second of the layers has a softening point of at least 180° C.
Claim 4
Dependent Claim
42 words
The method according to claim 1 wherein said material comprises co-extruded layers, a first of the non-fabric layers comprising an ionomeric material and a second of the non-fabric layers comprising a thermoplastic material having a softening point of at least 180° C.
Claim 5
Dependent Claim
15 words
The method according to claim 1 wherein the second of the layers comprises nylon 6.
Claim 6
Dependent Claim
23 words
The method according to claim 1 wherein said material further comprises a co-extruded layer of adhesive composition on the first of the layers.
Claim 7
Dependent Claim
21 words
The method according to claim 1 wherein an adhesive layer is coated on at least the first of the co-extruded layers.
Claim 8
Dependent Claim
33 words
The method according to claim 1 wherein the thickness of the first layer is in the range of 0.2-0.75 mm and the thickness of the second layer is in the range 0.02-0.03 mm.
Claim 9
Dependent Claim
17 words
The method according to claim 1 wherein the second of the layers comprises polymethylpentene, polyester or polycarbonate.
Claim 10
Dependent Claim
163 words
In a method of making shoes wherein a shoe stiffener material is bonded to a shoe upper by a hot melt adhesive by positioning said shoe stiffener material and said shoe upper with said hot melt adhesive therebetween in a fusion press having two platens, one of which is heated to a temperature of approximately 180°-200° C., and pressing said platens together wherein the adhesive is heated and bonds the stiffener material to the shoe upper, the improvement which comprises: employing, as said shoe stiffener, a material comprising co-extruded non-fabric layers of plastic film, a first of the non-fabric layers comprising an ionomeric material and providing a main body of the stiffener material and a second of the non-fabric layers comprising a plastic material which does not adhere to said fusion press under the conditions normally encountered therein during the bonding of a shoe stiffener to a shoe upper, wherein the thickness of the shoe stiffener material is in the range 0.2-0.8 mm.
Claim 11
Dependent Claim
163 words
In a method of making shoes wherein a shoe stiffener material is bonded to a shoe upper by a hot melt adhesive by positioning said shoe stiffener material and said shoe upper with said hot melt adhesive therebetween in a fusion press having two platens, one of which is heated to a temperature of approximately 180°-200° C., and pressing said platens together wherein the adhesive is heated and bonds the stiffener material to the shoe upper, the improvement which comprises: employing, as said shoe stiffener, a material comprising co-extruded non-fabric layers of plastic film, a first of the non-fabric layers comprising an ionomeric material and providing a main body of the stiffener material and a second of the non-fabric layers comprising a plastic material which does not adhere to said fusion press under the conditions normally encountered therein during the bonding of a shoe stiffener to a shoe upper, wherein the thickness of the shoe stiffener material is in the range 0.2-0.8 mm.
Claim 12
Dependent Claim
15 words
The method according to claim 9 wherein the second of the layers comprises nylon 6.
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) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |