Patent US2338395A successfully refreshed from Google Patents.
US4313984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated identity card having separation-resistant laminae and method of manufacturing same
Assignee: Hoechst AG
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Filing: 1979-12-19
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Granted: 1982-02-02
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Expires: 1999-12-19
Abstract
Abstract Identity card comprising top and bottom outer transparent thermoplastic cover layers laminated to a thermoplastic core comprising a pair of core layers having interposed therebetween a reinforcing support layer which is dimensionally stable under the temperature and pressure conditions utilized to laminate the layers to each other; the cover layers and core layers being formed of thermoplastic polymeric material such as polyvinyl chloride; the support layer being permeable to the thermoplastic material of the surrounding core layers such that the core layers are firmly bonded to each other through the support layer when the layers are laminated to each other; the card carrying at suitable points on at least one layer information serving to identify the cardholder and further carrying security markings, such as guilloche figures, for protection against forgeries.
Inventors
- 👤 Roland Moraw
- 👤 Renate Schadlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/266; B42; B42D; B42D25/00; B32B27/00; B32B27/06; B32B27/08; B32B27/10; B32B27/30; B32B27/304; B42D25/20; B42D25/23; B42D25/30; B42D25/346; B42D25/40; B42D25/45; B42D25/455; B42D25/46; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2425/00; B42D2033/04; B42D2033/22; B42D2033/28; B42D2033/30; B42D2035/02; B42D2035/06; B42D2035/08; Y; Y10; Y10S; Y10S428/00; Y10S428/916; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24347; Y10T428/24777; Y10T428/24802; Y10T428/24851; Y10T428/24868; Y10T428/24934; Y10T428/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
An identity card comprising at least one outer transparent thermoplastic cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identity the cardholder and security markings for protecting against forgeries; said core further comprising a perforated reinforcing support layer which is dimensionally stable under the conditions used to laminate the thermoplastic polymeric material and permeable to the thermoplastic polymer of the core, wherein marginal areas of the support layer are more heavily perforated than a central area of the support layer.
Claim 2
Dependent Claim
94 words
An identity card comprising at least one outer transparent thermoplastic cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identity the cardholder and security markings for protecting against forgeries; said core further comprising a perforated reinforcing support layer which is dimensionally stable under the conditions used to laminate the thermoplastic polymeric material and permeable to the thermoplastic polymer of the core, wherein marginal areas of the support layer are more heavily perforated than a central area of the support layer.
Claim 3
Dependent Claim
16 words
Identity card according to claim 1, wherein the support layer is perforated along the edges thereof.
Claim 4
Dependent Claim
116 words
An identity card comprising at least one outer transparent thermoplastic cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identify the cardholder and security markings for protecting against forgeries; said core further comprising a reinforcing support layer which is dimensionally stable under the conditions used to laminate the thermoplastic polymeric materials and permeable to the thermoplastic polymer of the core, said support layer being provided with holes having varying diameters ranging from about 0.5 to about 2 mm, and the average distance between the centers of adjacent holes being equal to three times the mean value of the radii of the holes.
Claim 5
Dependent Claim
116 words
An identity card comprising at least one outer transparent thermoplastic cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identify the cardholder and security markings for protecting against forgeries; said core further comprising a reinforcing support layer which is dimensionally stable under the conditions used to laminate the thermoplastic polymeric materials and permeable to the thermoplastic polymer of the core, said support layer being provided with holes having varying diameters ranging from about 0.5 to about 2 mm, and the average distance between the centers of adjacent holes being equal to three times the mean value of the radii of the holes.
Claim 6
Dependent Claim
20 words
Identity card according to claim 3, wherein the holes in the support layer are arranged to constitute a security marking.
Claim 7
Dependent Claim
15 words
Identity card according to claim 4, wherein said holes are arranged in a random pattern.
Claim 8
Dependent Claim
17 words
Identity card according to claim 4, wherein said holes are arranged to form an emblem or figure.
Claim 9
Dependent Claim
18 words
Identity card according to claim 1 or 3 comprising a top cover layer and a bottom cover layer.
Claim 10
Dependent Claim
18 words
Identity card according to claim 1 or 3, wherein said security markings comprise at least one guilloche figure.
Claim 11
Dependent Claim
19 words
Identity card according to claim 1 or 3, wherein said fusible polymeric material is formed of thermoplastic polyvinyl chloride.
Claim 12
Dependent Claim
50 words
A method of manufacturing an identity card according to claim 1 or 3 wherein the support layer is enclosed between a pair of core layers and the layers are laminated to each other at a temperature of at least 160° C. and a bonding pressure of at least 20 bars.
Claim 13
Dependent Claim
21 words
Method according to claim 10, wherein the laminating temperature is about 180° C. and the bonding pressure is about 40 bars.
Claim 14
Dependent Claim
110 words
An identity card comprising at least one outer transparent cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identify the cardholder and security markings for protecting against forgeries; said core comprising two thermoplastic core layers laminated to each other with a reinforcing support layer interposed therebetween, said support layer being dimensionally stable under the conditions used to laminate the thermoplastic polymeric materials and permeable to the thermoplastic polymer material of the core layers, the thermoplastic polymer material of said core layers permeating said support layer and producing a firm bond therethrough between the respective core layers.
Claim 15
Dependent Claim
110 words
An identity card comprising at least one outer transparent cover layer formed of thermoplastic polymeric material laminated to a thermoplastic polymeric material core; said card carrying at suitable points information serving to identify the cardholder and security markings for protecting against forgeries; said core comprising two thermoplastic core layers laminated to each other with a reinforcing support layer interposed therebetween, said support layer being dimensionally stable under the conditions used to laminate the thermoplastic polymeric materials and permeable to the thermoplastic polymer material of the core layers, the thermoplastic polymer material of said core layers permeating said support layer and producing a firm bond therethrough between the respective core layers.
Claim 16
Dependent Claim
22 words
Identity card according to claim 12, wherein the support layer comprises paper perforated with holes having a diameter of about 2 mm.
References Cited (Backward Citations)
FR961181A
Cited
FR1347240A
Cited
US3413171A
Cited
US3614839A
Cited
FR2117055A5
Cited
FR2114705A5
Cited
DE2163943A1
Cited
DE2308876C3
Cited
US4096015A
Cited
US4119361A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-01 | 1985-08-03 | 1986-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-01 | 1989-08-03 | 1990-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-01 | 1993-08-03 | 1994-02-02 | $7700.00 | Window Closed / Lapsed |