Patent US4809979A successfully refreshed from Google Patents.
Patent US4095008A successfully refreshed from Google Patents.
US4095008A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Syntactic foam matrix board
Assignee: Lydall Inc
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Filing: 1975-08-13
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Granted: 1978-06-13
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Expires: 1995-08-13
Abstract
Abstract A matrix board and the method of manufacture thereof are presented wherein the board has a relatively thin carrier sheet, a relatively thick layer of syntactic foam on the carrier sheet and a relatively thin layer of phenolic resin and filler over the relatively thick syntactic foam layer. The matrix board is capable of being molded at low pressures on the order of fifty psi, thus making it particularly suitable for use with rubber and photopolymer pattern or master plates and also making it particularly suitable for formation of deep relief matrix boards.
Inventors
- 👤 Donald W. Sundstrom
- 👤 Richard L. Maine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:17
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/18; B32B27/00; B32B27/06; B32B27/065; B32B27/42; B32B29/00; B32B29/002; B32B29/007; B32B5/22; B32B5/24; B32B5/245; C; C08; C08J; C08J9/00; C08J9/32; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S428/00; Y10S428/908; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24496; Y10T428/24504; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249971; Y10T428/249974; Y10T428/25; Y10T428/252; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2996
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
85 words
A matrix board for molding printing plates including: a carrier sheet; and a layer of syntactic foam on said carrier sheet, said layer of syntactic foam including, by weight, from 25-50% thermosetting resin, said thermosetting resin being not more than partially cured, from 25-75% hollow particles and from 5-25% an aqueous latex dispersion binder; said matrix board being deformable under pressure of from 25 psi to 125 psi and curable on exposure to heat to form a matrix board for the molding of printing plates.
Claim 2
Dependent Claim
85 words
A matrix board for molding printing plates including: a carrier sheet; and a layer of syntactic foam on said carrier sheet, said layer of syntactic foam including, by weight, from 25-50% thermosetting resin, said thermosetting resin being not more than partially cured, from 25-75% hollow particles and from 5-25% an aqueous latex dispersion binder; said matrix board being deformable under pressure of from 25 psi to 125 psi and curable on exposure to heat to form a matrix board for the molding of printing plates.
Claim 3
Dependent Claim
24 words
A matrix board as in claim 1, wherein said layer of syntactic foam further includes: from 0-5% release agent; and from 0-1.5% alkaline buffer.
Claim 4
Dependent Claim
38 words
A matrix board as in claim 1 wherein: said carrier sheet is a relatively thin layer of from 0.004 to 0.020 inches; and said syntactic foam layer is a relatively thick layer of from 0.060 to 0.500 inches.
Claim 5
Dependent Claim
39 words
A matrix board as in claim 3 wherein: the thickness of said syntactic foam layer is greater than 0.015 inches; and wherein said matrix board is deformable to form deep relief areas having depths of at least 0.15 inches.
Claim 6
Dependent Claim
15 words
A matrix board as in claim 1 wherein: said thermosetting resin is a phenolic resin.
Claim 7
Dependent Claim
17 words
A matrix board as in claim 1 further including: a cover layer including phenolic resin and binder.
Claim 8
Dependent Claim
24 words
A matrix board as in claim 6, wherein said layer of syntactic foam further includes: from 0-5% release agent; and from 0-1.5% alkaline buffer.
Claim 9
Dependent Claim
52 words
A matrix board as in claim 6 wherein: said carrier sheet is a relatively thin layer of from 0.004 to 0.020 inches; said syntactic foam layer is a relatively thick layer of from 0.060 to 0.500 inches; and said cover layer is a relatively thin layer of from 0.015 to 0.040 inches.
Claim 10
Dependent Claim
39 words
A matrix board as in claim 8 wherein: the thickness of said syntactic foam layer is greater than 0.15 inches; and wherein said matrix board is deformable to form deep relief areas having depths of at least 0.15 inches.
Claim 11
Dependent Claim
15 words
A matrix board as in claim 6 wherein: said thermosetting resin is a phenolic resin.
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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |