US3835558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insole
Assignee: DVSG Holding GmbH
•
Filing: 1973-03-20
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Granted: 1974-09-17
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Expires: 1993-03-20
Abstract
Abstract Insole of non-woven bonded fiber sheet material including a shank portion of greater stiffness and density than the forward portion in which a through layer of non-woven fiber sheet including a heat-softenable binder is associated with one or more layers of non-woven fiber sheet including binder in the heel and shank or waist portion of the insole and the layers in the heel and shank or waist portion are consolidated by heat and pressure to a unitary board-like state in the heel and shank region. The insole including the heel and shank region may be given a contour approximating the contour of a bottom of a foot in a pressing operation and may also incorporate a layer of stiff plastic sheet material.
Inventors
- 👤 H Revill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:38
CPC Classifications
A; A43; A43B; A43B13/00; A43B13/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
An insole comprising a non-woven bonded fiber sheet having outline shape for incorporation in foot wear, said sheet comprising at least one through layer of non-woven fiber bonded with a thermoplastic bonding agent and having an outline shape corresponding to that of the insole and at least one short layer of non-woven fiber bonded with a thermoplastic bonding agent and joined by said bondiNg agents to a rear portion of said through layer, a rear portion of the insole comprising the through and short layers having a greater density and rigidity than that of the forepart of the insole, the rear portion of the insole being at least as thick as the forepart portion.
Claim 2
Dependent Claim
114 words
An insole comprising a non-woven bonded fiber sheet having outline shape for incorporation in foot wear, said sheet comprising at least one through layer of non-woven fiber bonded with a thermoplastic bonding agent and having an outline shape corresponding to that of the insole and at least one short layer of non-woven fiber bonded with a thermoplastic bonding agent and joined by said bondiNg agents to a rear portion of said through layer, a rear portion of the insole comprising the through and short layers having a greater density and rigidity than that of the forepart of the insole, the rear portion of the insole being at least as thick as the forepart portion.
Claim 3
Dependent Claim
40 words
As insole as defined in claim 1 comprising a layer of stiff resin sheet material bonded to a non-woven bonded fiber layer in the region of the heel seat of the insole into which heel attaching nails may be driven.
Claim 4
Dependent Claim
26 words
An insole as defined in claim 2 in which said layer of stiff resin sheet material corresponds in area to the area of said short layers.
Claim 5
Dependent Claim
42 words
An insole as defined in claim 1 in which a shank stiffener member is embedded in and bonded to a non-woven bonded fiber layer away from the surface of said insole which will be adjacent a foot in an article of footwear.
Claim 6
Dependent Claim
47 words
An insole as defined in claim 1 in which said layers of non-woven bonded fiber comprises a thermoplastic bonding agent having a softening point below the melting point of the fiber of said layers and above the temperatures to which said insole will be subjected in use.
Claim 7
Dependent Claim
30 words
An insole as defined in claim 5 in which the density of said rear portion of the insole is at least 50 percent greater than the density of the forepart.
References Cited (Backward Citations)
US1843349A
Cited
US2231552A
Cited
US2130968A
Cited
US2346279A
Cited
US2599317A
Cited
US3601908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |