Patent US4137363A successfully refreshed from Google Patents.
US4137363A
Expired / Lapsed
US
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Matrix material for printing plates and method of manufacture thereof
Assignee: Lydall Inc
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Filing: 1977-04-05
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Granted: 1979-01-30
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Expires: 1997-04-05
Abstract
Abstract A printing plate matrix is presented including mineral and/or organic fibers, thermosetting resin, and glass microbubbles uniformly dispersed throughout the material.
Inventors
- 👤 Clarence G. Maron
- 👤 Donald W. Sundstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:39
CPC Classifications
B; B41; B41C; B41C3/00; B41C3/04; Y; Y10; Y10S; Y10S428/00; Y10S428/908; Y10T; Y10T428/00; Y10T428/25; Y10T428/252; Y10T428/26; Y10T428/268; Y10T428/269
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
76 words
A sheet of moldable matrix material for printing plates, including : fibrous material; thermosetting resinous material; and microbubbles; said fibrous material, said thermosetting resinous material and said microbubbles being substantially uniformly distributed throughout said sheet of matrix material, said thermosetting resinous material in said sheet of matrix molding material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to form a printing plate matrix having sharp character definition.
Claim 2
Dependent Claim
76 words
A sheet of moldable matrix material for printing plates, including : fibrous material; thermosetting resinous material; and microbubbles; said fibrous material, said thermosetting resinous material and said microbubbles being substantially uniformly distributed throughout said sheet of matrix material, said thermosetting resinous material in said sheet of matrix molding material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to form a printing plate matrix having sharp character definition.
Claim 3
Dependent Claim
24 words
A sheet of matrix material as in claim 1 wherein: said fibrous material is selected from the group comprising mineral fibers and organic fibers.
Claim 4
Dependent Claim
26 words
A sheet of matrix material as in claim 1 wherein: said fibrous material is selected from the group comprising cotton fibers, wood fibers and asbestos fibers.
Claim 5
Dependent Claim
16 words
A sheet of matrix material as in claim 1 wherein: said thermosetting resin is phenolic resin.
Claim 6
Dependent Claim
40 words
A sheet of moldable matrix material as in claim 1 wherein: said sheet of matrix material is from approximately 0.05 inches to approximately 0.3 inches thick for shallow engraving of patterns from approximately 0.5 inches to 0.15 inches in depth.
Claim 7
Dependent Claim
25 words
A sheet of matrix material as in claim 1 wherein: said microbubbles constitute from 5% to 25% by weight of the sheet of matrix material.
Claim 8
Dependent Claim
15 words
A sheet of matrix material as in claim 6 wherein: said microbubbles are glass microspheres.
Claim 9
Independent Claim
85 words
The method of forming a sheet of moldable matrix material for printing plates, including the step of: mixing fibrous material, thermosetting resinous material and microbubbles to form a substantially uniform furnish; and forming said furnish into sheet material having said fibrous material, thermosetting resinous material and microbubbles dispersed substantially uniformly throughout said sheet material, said thermosetting resinous material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to form a printing plate matrix having sharp character definition.
Claim 10
Independent Claim
85 words
The method of forming a sheet of moldable matrix material for printing plates, including the step of: mixing fibrous material, thermosetting resinous material and microbubbles to form a substantially uniform furnish; and forming said furnish into sheet material having said fibrous material, thermosetting resinous material and microbubbles dispersed substantially uniformly throughout said sheet material, said thermosetting resinous material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to form a printing plate matrix having sharp character definition.
Claim 11
Dependent Claim
20 words
The method of claim 8 wherein: said mixing step includes mixing fibrous material selected from mineral fibers and organic fibers.
Claim 12
Dependent Claim
22 words
The method as in claim 8 wherein: said mixing step includes mixing fibers selected from cotton fibers, wood fibers and asbestos fibers.
Claim 13
Dependent Claim
14 words
The method as in claim 8 wherein: said mixing step includes mixing phenolic resin.
Claim 14
Dependent Claim
60 words
The method of forming a sheet of moldable matrix material as in claim 8 wherein: the step of forming the furnish into sheet material includes forming the furnish into a sheet of thickness ranging from approximately 0.05 inches to approximately 0.3 inches, the sheet being moldable to form shallow relief patterns ranging from 0.05 inches to 0.15 inches in depth.
Claim 15
Dependent Claim
56 words
A method according to claim 8 wherein said fibrous material includes organic fibers or mineral fibers or a mixture thereof and said microbubbles are glass, have a generally spherical shape, have diameters in the range of from about 5 microns to about 300 microns, and constitute from 5 to 25 weight percent of the matrix material.
Claim 16
Dependent Claim
25 words
The method of claim 8 wherein: said mixing step includes mixing from 5% to 25% by weight of microbubbles with said fibrous and resinous materials.
Claim 17
Dependent Claim
11 words
The method of claim 14 wherein: said microbubbles are glass microspheres.
Claim 18
Dependent Claim
124 words
A sheet of moldable matrix material for printing plates comprising: a. fibrous material including organic fibers or mineral fibers or a mixture thereof; b. thermosetting resinous material; and c. glass microbubbles having a generally spherical shape, having diameters in the range from 5 microns to 300 microns, and constituting from 5 to 25 weight percent of the matrix material; said fibrous material, said resinous material and said glass microbubbles being substantially uniformly distributed throughout said sheet of matrix material, said thermosetting resinous material in said sheet of matrix molding material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to cure said thermosetting resinous material and to form a printing plate matrix having sharp character definition.
Claim 19
Dependent Claim
124 words
A sheet of moldable matrix material for printing plates comprising: a. fibrous material including organic fibers or mineral fibers or a mixture thereof; b. thermosetting resinous material; and c. glass microbubbles having a generally spherical shape, having diameters in the range from 5 microns to 300 microns, and constituting from 5 to 25 weight percent of the matrix material; said fibrous material, said resinous material and said glass microbubbles being substantially uniformly distributed throughout said sheet of matrix material, said thermosetting resinous material in said sheet of matrix molding material being less than fully cured and said sheet of matrix material being moldable under heat and pressure to cure said thermosetting resinous material and to form a printing plate matrix having sharp character definition.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |