US4363684A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the lamination of foam including a reinforcing scrim
Assignee: Dow Chemical Co
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Filing: 1981-06-09
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Granted: 1982-12-14
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Expires: 2001-06-09
Abstract
Abstract Thermoplastic foam bodies are readily generally continuously laminated together wherein the joint therebetween contains a reinforcing scrim. Friction on each of the foam bodies is generally equalized by positioning the scrim relative to both major faces of the heating element employed for the lamination to obtain a desired degree of curvature in the laminate.
Inventors
- 👤 II Robert A. Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:27
CPC Classifications
B; B29; B29C; B29C37/00; B29C37/0078; B29C37/0082; B32; B32B; B32B27/00; B32B27/06; B32B27/065; B29C44/00; B29C44/02; B29C44/12; B29C65/00; B29C65/02; B29C65/18; B29C65/20; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/72; B29C66/727; B29C66/73; B29C66/739; B29C66/7392; B29C66/80; B29C66/81; B29C66/812; B29C66/8122; B29C66/818; B29C66/8187; B29C66/81871; B29C66/83; B29C66/836; B29C66/90; B29C66/91; B29C66/912; B29C66/9121; B29C66/91231; B29C66/914; B29C66/9141; B29C66/91421; B32B27/12; B29C66/71; B29C66/721; B29C66/7212; B29K; B29K2105/00; B29K2105/04; B29K2105/06; B29L; B29L2009/00; B29L2031/00; B29L2031/10; B29L2031/106; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/0221; B32B2266/0228; Y; Y10; Y10S; Y10S220/00; Y10S220/901; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/101; Y10T156/1015; Y10T156/1089; Y10T156/1092; Y10T156/1097; Y10T156/1098; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249955; Y10T428/249981
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
107 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises positioning the scrim relative to the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Claim 2
Dependent Claim
107 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises positioning the scrim relative to the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein the scrim is in the form of a single scrim folded over the heating element.
Claim 4
Dependent Claim
24 words
The method of claim 1, wherein the scrim comprises two separate portions, a portion being disposed on each of the two major heating surfaces.
Claim 5
Dependent Claim
11 words
The method of claim 2, wherein the scrim is longitudinally folded.
Claim 6
Dependent Claim
21 words
The method of claim 1, wherein the element is a generally flat sheet in the configuration of a serpentine resistance heater.
Claim 7
Dependent Claim
16 words
The method of claim 1, wherein the scrim is passed generally centrally through the heating element.
Claim 8
Dependent Claim
22 words
The method of claim 1, wherein the scrim is passed from the first side to the second side of the heating element.
Claim 9
Dependent Claim
20 words
The method of claim 1, wherein the heating element comprises two spaced-apart planar members and the scrim is passed therebetween.
Claim 10
Dependent Claim
138 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises passing the reinforcing scrim, the scrim being in the form of one scrim folded over the heating element or the scrim comprising two separate portions, a portion disposed on each of the major heating surfaces, over the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Claim 11
Dependent Claim
138 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent foam surfaces of adjacent foam bodies are heated by means of a generally planar heating element having first and second opposed heating surfaces to a temperature sufficient that on contact of the adjacent foam surfaces and cooling thereof, a rigid bond is achieved between the bodies, the improvement which comprises passing the reinforcing scrim, the scrim being in the form of one scrim folded over the heating element or the scrim comprising two separate portions, a portion disposed on each of the major heating surfaces, over the major surfaces of the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Claim 12
Dependent Claim
95 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent surfaces of adjacent foam bodies are heated by means of a generally planar heating element to a temperature sufficient that on contact of the adjacent surfaces and cooling thereof, a rigid bond is achieved between the bodies therein, the improvement which comprises passing the reinforcing scrim through the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
Claim 13
Dependent Claim
95 words
In a generally continuous method for the preparation of an elongate laminate of synthetic resinous thermoplastic foam body incorporating a reinforcing scrim therein wherein adjacent surfaces of adjacent foam bodies are heated by means of a generally planar heating element to a temperature sufficient that on contact of the adjacent surfaces and cooling thereof, a rigid bond is achieved between the bodies therein, the improvement which comprises passing the reinforcing scrim through the planar heating element during the heating of the adjacent foam surfaces to thereby obtain a laminate exhibiting a desired degree of curvature.
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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |