US3678147A
Expired / Lapsed
US
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A method for making reinforced grating
Assignee: LEE H PATCHEN
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Filing: 1970-04-13
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Granted: 1972-07-18
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Expires: 1990-04-13
Abstract
Abstract A method of forming a plastic grating reinforced with longitudinally and transversely extending rows of strands or filaments, each of the rows of filaments comprising a plurality of spaced-apart generally aligned filaments. The openings of the grating are provided through the areas defined by intersecting rows of filaments. The grating is formed by introducing a predetermined amount of resin material into a pan mold, and then lowering a lattice of intersecting rows of filaments into the mold. Thereafter, a mold core which includes vertically extending fingers shaped to be received by the vertically extending openings in the lattice is lowered into the mold to raise the level of the resin material to cover the filaments. After the resin material is hardened, the mold core is raised and the grating is removed from the pan mold.
Inventors
- 👤 Lee H Patchen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:31
CPC Classifications
B; B29; B29D; B29D28/00; B29D28/005; B29C; B29C33/00; B29C33/0033; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/467
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A method of making a reinforced grating comprising the steps of: introducing a quantity of flowable hardenable resin material into a pan mold, positioning filament-supporting frame means in the pan mold, the frame means supporting a plurality of rows of elongated filaments, the rows of filaments being horizontally spaced apart and each row of filaments comprising a plurality of vertically spaced horizontally extending filaments, at least some of the filaments being positioned above the resin material, simultaneously lowering a plurality of generally vertically extending mold projections into the pan mold to raise the level of the resin material so that additional filaments are covered by the material, each mold projection being lowered between a pair of adjacent horizontally spaced rows of filaments, allowing the resin material to harden, removing the frame means from the hardened resin material, and raising the mold projections from the hardened resin material.
Claim 2
Independent Claim
147 words
A method of making a reinforced grating comprising the steps of: introducing a quantity of flowable hardenable resin material into a pan mold, positioning filament-supporting frame means in the pan mold, the frame means supporting a plurality of rows of elongated filaments, the rows of filaments being horizontally spaced apart and each row of filaments comprising a plurality of vertically spaced horizontally extending filaments, at least some of the filaments being positioned above the resin material, simultaneously lowering a plurality of generally vertically extending mold projections into the pan mold to raise the level of the resin material so that additional filaments are covered by the material, each mold projection being lowered between a pair of adjacent horizontally spaced rows of filaments, allowing the resin material to harden, removing the frame means from the hardened resin material, and raising the mold projections from the hardened resin material.
Claim 3
Dependent Claim
96 words
The method of claim 1 in which the filament-supporting frame means supports a plurality of second rows of elongated filaments, the second rows of filaments being horizontally spaced and extending generally perpendicularly to the first-mentioned rows of filaments, each of the second rows of filaments comprising a plurality of vertically spaced filaments which intersect with the first-mentioned rows of filaments to provide a plurality of generally vertically extending openings defined by the intersecting rows of filaments, the mold projections comprising mold fingers shaped to be received by the vertically extending openings as the fingers are lowered.
Claim 4
Dependent Claim
24 words
The method of claim 2 in which the horizontal cross section of each of the mold fingers is uniform along the vertical length thereof.
Claim 5
Independent Claim
213 words
A method of making a reinforced plastic gearing comprising the steps of: introducing a quantity of flowable hardenable resin material into a pan mold, the pan having a generally horizontally extending bottom wall and a perimetric side wall extending upwardly from the bottom wall, positioning lattice-supporting frame means in the pan mold, the lattice comprising a first set of vertically spaced layers of generally horizontally extending generally parallel spaced-apart filaments, the filaments of each of the first layers being generally aligned in the vertical direction, and a second set of vertically spaced layers of generally horizontally extending spaced-apart filaments, the filaments of The second layers extending generally perpendicular to the filaments of the first layers, the filaments of each of the second layers being generally aligned in a vertical direction whereby a plurality of generally vertically extending openings having a generally rectangular horizontal cross section are provided between the perpendicularly related generally vertically aligned filaments of the first and second layers, simultaneously lowering a plurality of generally vertically extending mold fingers into the vertically extending openings to raise the level of the resin material to cover the filaments, allowing the resin material to harden, removing the frame means from the hardened resin material, and raising the mold fingers from the hardened resin material.
Claim 6
Independent Claim
213 words
A method of making a reinforced plastic gearing comprising the steps of: introducing a quantity of flowable hardenable resin material into a pan mold, the pan having a generally horizontally extending bottom wall and a perimetric side wall extending upwardly from the bottom wall, positioning lattice-supporting frame means in the pan mold, the lattice comprising a first set of vertically spaced layers of generally horizontally extending generally parallel spaced-apart filaments, the filaments of each of the first layers being generally aligned in the vertical direction, and a second set of vertically spaced layers of generally horizontally extending spaced-apart filaments, the filaments of The second layers extending generally perpendicular to the filaments of the first layers, the filaments of each of the second layers being generally aligned in a vertical direction whereby a plurality of generally vertically extending openings having a generally rectangular horizontal cross section are provided between the perpendicularly related generally vertically aligned filaments of the first and second layers, simultaneously lowering a plurality of generally vertically extending mold fingers into the vertically extending openings to raise the level of the resin material to cover the filaments, allowing the resin material to harden, removing the frame means from the hardened resin material, and raising the mold fingers from the hardened resin material.
Claim 7
Dependent Claim
24 words
The method of claim 4 in which the horizontal cross section of each of the mold fingers is uniform along the vertical length thereof.
Claim 8
Dependent Claim
19 words
The method of claim 4 in which the layers are generally planar and extend generally parallel to each other.
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) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |