US4088805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced thermoplastic foam sheet
Assignee: Leucadia Inc
•
Filing: 1975-04-14
•
Granted: 1978-05-09
•
Expires: 1995-04-14
Abstract
Abstract A reinforced low density thermoplastic foam sheet is disclosed. The sheet is a laminate comprising outer laminae of low density thermoplastic foam and a thermoplastic film having about the same tackifying temperature as the foam and a central layer comprising a reinforcing net or net-like structure.
Inventors
- 👤 Donald E. Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B32B7/00; B32B7/02; B32B7/027; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C65/00; B29C65/48; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7894; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/71; B29C66/72; B29C66/727; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C67/00; B29C67/20; B32B27/32; B32B5/00; B32B5/18; B32B5/22; B32B5/24; B32B5/245; B29K; B29K2105/00; B29K2105/06; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/025; B32B2305/00; B32B2305/08; B32B2307/00; B32B2307/70; B32B2307/72; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2323/00; B32B2323/04; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/23; Y10T428/239; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T442/00; Y10T442/60; Y10T442/647; Y10T442/674
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
161 words
A reinforced low density thermoplastic foam sheet comprising: a. a first layer; b. said first layer being a sheet of low density thermoplastic foam of a density not over about 10 pounds per cubic foot; c. a second layer; d. said second layer being a thermoplastic film having a tackifying temperature which is within ± 10° F of that of the foam sheet; e. a third layer between the first and second layers; f. said third layer being a biaxially oriented polypropylene net-like structure having a tackifying temperature at least 50° F higher than the tackifying temperature of the foam sheet and the film; g. said net-like structure being at least partially embedded into said first layer, said second layer being in contact with said first layer; h. the second layer being heat sealed to the first layer through the interstices of said net-like structure; and i. said net-like structure being heat sealed to neither said first nor said second layer.
Claim 2
Dependent Claim
161 words
A reinforced low density thermoplastic foam sheet comprising: a. a first layer; b. said first layer being a sheet of low density thermoplastic foam of a density not over about 10 pounds per cubic foot; c. a second layer; d. said second layer being a thermoplastic film having a tackifying temperature which is within ± 10° F of that of the foam sheet; e. a third layer between the first and second layers; f. said third layer being a biaxially oriented polypropylene net-like structure having a tackifying temperature at least 50° F higher than the tackifying temperature of the foam sheet and the film; g. said net-like structure being at least partially embedded into said first layer, said second layer being in contact with said first layer; h. the second layer being heat sealed to the first layer through the interstices of said net-like structure; and i. said net-like structure being heat sealed to neither said first nor said second layer.
Claim 3
Dependent Claim
27 words
The reinforced low density thermoplastic foam sheet of claim 1 wherein the low density thermoplastic foam has a density no greater than six pounds per cubic foot.
Claim 4
Dependent Claim
27 words
The reinforced low density thermoplastic foam sheet of claim 1 wherein the low density thermoplastic foam has a density no greater than four pounds per cubic foot.
Claim 5
Dependent Claim
26 words
The reinforced low density thermoplastic foam sheet of claim 1 wherein the thermoplastic film has a thickness of from about 1/2 mil to about 3 mils.
Claim 6
Dependent Claim
24 words
The reinforced low density thermoplastic foam sheet of claim 1 wherein the thermoplastic film has a thickness from about 3/4 mil to 2 mils.
Claim 7
Dependent Claim
31 words
The reinforced low density thermoplastic foam sheet of claim 1 wherein the thermoplastic foam sheet has a thickness at least as great as the thickest part of the reinforcing net-like structure.
Claim 8
Dependent Claim
161 words
A reinforced low density polyethylene foam sheet comprising: a. a first layer; b. said first layer being a sheet of low density polyethylene foam of a density not over about 10 pounds per cubic foot; c. a second layer; d. said second layer being a polyethylene film having a tackifying temperature which is within ± 10° F of that of the foam sheet; e. a third layer between the first and second layers; f. said third layer being a biaxially oriented polypropylene net-like structure having a tackifying temperature at least 50° F higher than the tackifying temperature of the foam sheet and the film; g. said net-like structure being at least partially embedded into said first layer, said second layer being in contact with said first layer; h. the second layer being heat sealed to the first layer through the interstices of said net-like structure; and i. said net-like structure being heat sealed to neither said first nor said second layer.
Claim 9
Dependent Claim
161 words
A reinforced low density polyethylene foam sheet comprising: a. a first layer; b. said first layer being a sheet of low density polyethylene foam of a density not over about 10 pounds per cubic foot; c. a second layer; d. said second layer being a polyethylene film having a tackifying temperature which is within ± 10° F of that of the foam sheet; e. a third layer between the first and second layers; f. said third layer being a biaxially oriented polypropylene net-like structure having a tackifying temperature at least 50° F higher than the tackifying temperature of the foam sheet and the film; g. said net-like structure being at least partially embedded into said first layer, said second layer being in contact with said first layer; h. the second layer being heat sealed to the first layer through the interstices of said net-like structure; and i. said net-like structure being heat sealed to neither said first nor said second layer.
Claim 10
Dependent Claim
27 words
The reinforced low density polyethylene foam sheet of claim 7 wherein the low density polyethylene foam has a density no greater than six pounds per cubic foot.
Claim 11
Dependent Claim
27 words
The reinforced low density polyethylene foam sheet of claim 7 wherein the low density polyethylene foam has a density no greater than four pounds per cubic foot.
Claim 12
Dependent Claim
26 words
The reinforced low density polyethylene foam sheet of claim 7 wherein the polyethylene film has a thickness of from about 1/2 mil to about 3 mils.
Claim 13
Dependent Claim
24 words
The reinforced low density polyethylene foam sheet of claim 7 wherein the polyethylene film has a thickness from about 3/4 mil to 2 mils.
Claim 14
Dependent Claim
31 words
The reinforced low density polyethylene foam sheet of claim 7 wherein the polyethylene foam sheet has a thickness at least as great as the thickest part of the reinforcing net-like structure.
References Cited (Backward Citations)
CA780177A
Cited
US3264166A
Cited
US3222237A
Cited
US3446685A
Cited
US3423263A
Cited
US3616130A
Cited
US3607603A
Cited
US3748217A
Cited
US3741844A
Cited
US3936565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-08 | 1981-11-07 | 1982-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-08 | 1985-11-07 | 1986-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-08 | 1989-11-07 | 1990-05-09 | $7700.00 | Window Closed / Lapsed |