Patent US3982949A successfully refreshed from Google Patents.
US3982949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half-tone screen making by decapitation of substrate projections
Assignee: Individual
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Filing: 1975-08-06
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Granted: 1976-09-28
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Expires: 1995-08-06
Abstract
Abstract A half-tone screen comprises a transparent or opaque sheet having an uneven face with a multitude of projections thereon coated with a paint or varnish of contrasting color. By scraping, the coating material is removed and the projections decapitated to a selected degree to provide desired progressive shading effects.
Inventors
- 👤 Edgard Reymond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:14
CPC Classifications
B; B44; B44C; B44C1/00; B44C1/20; B44C1/22; B44F; B44F1/00; B44F1/08; G; G03; G03F; G03F5/00; G03F5/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
106 words
A method of producing a screen with selected half-tone effects comprising providing a sheet of first material having an uneven face which in cross-section has a multitude of projections placed close to one another, each projection having an apex and being of progressively decreasing width up to the apex, said uneven face being covered at least partially with a second material having different light-absorbtion properties to the first material, and removing the first and second materials by decapitation of said projections to a greater depth at some areas than at other areas to selectively uncover the first material for the provision of said selected half-tone effects.
Claim 2
Independent Claim
106 words
A method of producing a screen with selected half-tone effects comprising providing a sheet of first material having an uneven face which in cross-section has a multitude of projections placed close to one another, each projection having an apex and being of progressively decreasing width up to the apex, said uneven face being covered at least partially with a second material having different light-absorbtion properties to the first material, and removing the first and second materials by decapitation of said projections to a greater depth at some areas than at other areas to selectively uncover the first material for the provision of said selected half-tone effects.
Claim 3
Dependent Claim
26 words
The method according to claim 1, in which said first material is transparent and said second material is a colored material transparent only to inactinic light.
Claim 4
Dependent Claim
15 words
The method according to claim 1, in which said sheet of first material is flexible.
Claim 5
Dependent Claim
29 words
The method according to claim 1, in which said sheet has a smooth second face opposite said uneven face, and comprising a layer of adhesive on said second face.
Claim 6
Dependent Claim
16 words
The method according to claim 1, in which said projections each have a regularly shaped base.
Claim 7
Dependent Claim
12 words
The method according to claim 1, in which the projections are pyramid-shaped.
Claim 8
Dependent Claim
12 words
The method according to claim 1, in which the projections are conical.
Claim 9
Dependent Claim
24 words
The method according to claim 1, in which the projections are prisms of triangular cross-section, each prism having an elongate summit forming said apex.
Claim 10
Dependent Claim
21 words
The method according to claim 1, in which said apex-forming summits of different prisms are rectilinear and parallel to one another.
Claim 11
Dependent Claim
21 words
The method according to claim 1, in which said apex-forming summits of different prisms are curved and parallel to one another.
Claim 12
Dependent Claim
13 words
The method according to claim 1, in which said projections have irregular bases.
Claim 13
Dependent Claim
14 words
The method according to claim 1, in which said projections form a granulated surface.
Claim 14
Dependent Claim
15 words
The method according to claim 1, in which said first material is a synthetic resin.
Claim 15
Dependent Claim
19 words
The method according to claim 1, in which said first material is gelatine, and the second material a varnish.
Claim 16
Dependent Claim
29 words
The method according to claim 1, in which said first material is opaque and of a dark color and the second material is opaque and of a light color.
Claim 17
Dependent Claim
29 words
The method according to claim 1, in which said first material is opaque and of a light color and the second material is opaque and of a dark color.
Claim 18
Dependent Claim
22 words
The method according to claim 1, in which said second material is applied as a layer of uniform thickness on said projections.
Claim 19
Dependent Claim
22 words
The method according to claim 1, in which said projections are embedded in the second material which has a smooth outer face.
Claim 20
Dependent Claim
60 words
The method according to claim 1, in which said first material is transparent and the second material is opaque and of a given color, said sheet having a smooth second face opposite said uneven face, said second face being coated with a layer of an opaque third material having a color contrasting with said given color of the second material.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-28 | 1980-03-29 | 1980-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-28 | 1984-03-29 | 1984-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-28 | 1988-03-29 | 1988-09-28 | $7700.00 | Window Closed / Lapsed |