US3640603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic reinforcing edging for picture-receiving screen
Assignee: Graflex Inc
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Filing: 1969-11-05
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Granted: 1972-02-08
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Expires: 1989-11-05
Abstract
Abstract A reinforcing strip for application to the edges of a projected picture receiving fabric screen is provided with a pair of laterally spaced side portions. Complementary reinforcing edgings are applied to the top and underside portions of the upper and lower edging strips stapled together. The fabric and the central portions of the upper and lower reinforcing edgings are then cut so that the reinforcing strips form marginal reinforcing edgings for the lower part of one screen fabric and the upper part of a succeeding screen fabric. The inner flat surfaces of the side edges of the reinforcing strips are saw-toothed or otherwise roughened to cause a firm gripping of the intermediately disposed fabric.
Inventors
- 👤 Michael J Balmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:19
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A process for reinforcing the edges of a fabric picturereceiving screen comprising the steps of laying a reinforcing edging strip over the top of the fabric and directly underneath the fabric, each edging strip having in cross section laterally spaced-apart edge portions and a central portion joining said edge portions, and each of the edge portions having a rough surface for engaging the fabric, fasteninG the edge portions lying above and below the fabric together with the included fabric as a sandwich, and slitting the central portions and the included fabric to provide for the reinforcing of the edges of successively formed fabric picture receiving screens.
Claim 2
Dependent Claim
106 words
A process for reinforcing the edges of a fabric picturereceiving screen comprising the steps of laying a reinforcing edging strip over the top of the fabric and directly underneath the fabric, each edging strip having in cross section laterally spaced-apart edge portions and a central portion joining said edge portions, and each of the edge portions having a rough surface for engaging the fabric, fasteninG the edge portions lying above and below the fabric together with the included fabric as a sandwich, and slitting the central portions and the included fabric to provide for the reinforcing of the edges of successively formed fabric picture receiving screens.
Claim 3
Dependent Claim
27 words
A process as set forth in claim 1 in which the reinforcing edging strip is a preformed plastic and the central portion is a thin plastic membrane.
Claim 4
Dependent Claim
100 words
Vertically aligned top and bottom reinforcing tapes for application across a picture-receiving fabric, each tape comprising in cross section a pair of laterally spaced-apart marginal edge portions, and a connecting central portion joining said marginal edge portions, said laterally spaced-apart marginal edge portions and the connecting central portion lying in a single plane, and fastening means passing through each of the laterally spaced-apart vertically aligned pairs of edge portions of the reinforcing tapes and the included fabric whereby when the connecting central portions and the included fabric are slit thereacross each of the severed edges of the fabric is reinforced.
Claim 5
Dependent Claim
100 words
Vertically aligned top and bottom reinforcing tapes for application across a picture-receiving fabric, each tape comprising in cross section a pair of laterally spaced-apart marginal edge portions, and a connecting central portion joining said marginal edge portions, said laterally spaced-apart marginal edge portions and the connecting central portion lying in a single plane, and fastening means passing through each of the laterally spaced-apart vertically aligned pairs of edge portions of the reinforcing tapes and the included fabric whereby when the connecting central portions and the included fabric are slit thereacross each of the severed edges of the fabric is reinforced.
Claim 6
Dependent Claim
29 words
A device as set forth in claim 3 in which the fabric engaging surface of each of the marginal edge portions is roughened for better adherence to the fabric.
Claim 7
Dependent Claim
21 words
A device as set forth in claim 4 in which the connecting central portions are thinner than the marginal edge portions.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |