US3914368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making metal reinforced plastic screen
Assignee: WS Tyler Inc
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Filing: 1974-04-24
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Granted: 1975-10-21
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Expires: 1994-04-24
Abstract
Abstract A method of making plastic screen where a plurality of pegs are vertically positioned within an open topped mold by passing a peg through each opening of a positioning screen member located above the mold, and a castable liquid plastic is then poured into the mold. The bottom ends of the pegs are tapered, so that the holes or openings in the finished plastic screen are flared. Metal reinforced plastic screen is made in the same manner, only a peg is positioned within each opening of a metal screen, whose openings are the same size as, and are in alignment with, the openings of the positioning screen member, the metal screen being positioned closely adjacent the mold bottom or base, and the liquid plastic is poured into the mold to a height above the metal screen. The pegs are smaller than the metal screen openings, so that no metal is exposed in the finished article.
Inventors
- 👤 Richard Ernest Harkness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:18
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4618; B29; B29C; B29C33/00; B29C33/0033; B29C70/00; B29C70/68; B29C70/688; B29C70/70; B29D; B29D28/00; B29D28/005; B07B2201/00; B07B2201/02; B29C39/00; B29K; B29K2105/00; B29K2105/06; B29K2105/20; B29K2105/206; B29K2705/00; B29L; B29L2031/00; B29L2031/737
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
130 words
A METHOD OF MAKING METAL REINFIRCED PLASTIC SCREEN INCLUDING THE STEPS OF FORMING AN OPEN TOPPED MOLD HAVING A BASE AND UPWARDLY EXTENDING PERIPHERAL WALLS, POSITIONING A METAL SCREEN WITHIN THE MOLD IN A POSITION PARALLEL TO THE BASE, AND SPACED A SMALL DISTANCE THEREABOVE, POSITIONING AT LEAST ONE SCREEN MEMBER ABOVE THE MOLE, THE SCREEN MEMBER AND THE METAL SCREEN HAVING OPENINGS OF THE SAME SIZE, WITH THE OPENINGS OF THE SCREEN MEMBER BEING IN ALIGNMENT WITH THE OPENINGS OF THE METAL SCREEN POSITIONING A PEG VERTICALLY WITHIN EACH OF THE OPENINGS OF THE SCREEN MEMBER AND A CORRESPONDING OPENING OF THE METAL SCREEN, EACH PEG HAVING DIFFERENT TOP AND BOTTOM CROSS-SECTION AREAS AND ALL PEGS BEING ALIKE IN SIZE AND SHAPE, UPPER PORTIONS OF SAID PEGS BEING POSITIONED
Claim 2
Independent Claim
130 words
A METHOD OF MAKING METAL REINFIRCED PLASTIC SCREEN INCLUDING THE STEPS OF FORMING AN OPEN TOPPED MOLD HAVING A BASE AND UPWARDLY EXTENDING PERIPHERAL WALLS, POSITIONING A METAL SCREEN WITHIN THE MOLD IN A POSITION PARALLEL TO THE BASE, AND SPACED A SMALL DISTANCE THEREABOVE, POSITIONING AT LEAST ONE SCREEN MEMBER ABOVE THE MOLE, THE SCREEN MEMBER AND THE METAL SCREEN HAVING OPENINGS OF THE SAME SIZE, WITH THE OPENINGS OF THE SCREEN MEMBER BEING IN ALIGNMENT WITH THE OPENINGS OF THE METAL SCREEN POSITIONING A PEG VERTICALLY WITHIN EACH OF THE OPENINGS OF THE SCREEN MEMBER AND A CORRESPONDING OPENING OF THE METAL SCREEN, EACH PEG HAVING DIFFERENT TOP AND BOTTOM CROSS-SECTION AREAS AND ALL PEGS BEING ALIKE IN SIZE AND SHAPE, UPPER PORTIONS OF SAID PEGS BEING POSITIONED
Claim 3
Dependent Claim
25 words
The method of claim 1, including the step of coating the pegs with a mold releasing agent prior to their being positioned within the mold.
Claim 4
Dependent Claim
41 words
The method of claim 1, including the step of applying a downward force to the pegs, to insure that they are in good physical contact with the base prior to, during, and after the pouring of the plastic into the mold.
Claim 5
Dependent Claim
43 words
The method of claim 1, wherein the predetermined height above the metal screen is the same distance as the distance from the metal reinforced plastic screen to the base, so that the metal screen is centered in the final metal reinforced plastic screen.
Claim 6
Dependent Claim
47 words
The method set forth in claim 1, wherein the pegs are tapered at their bottom ends, the cross section of the pegs being smallest at their bottom end, so that the holes in the finished metal reinforced plastic screen are flared from one side to the other.
Claim 7
Dependent Claim
29 words
The method set forth in claim 1, wherein two screen members are positioned above the mold, one above the other, their openings being of equal size and in alignment.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |