US3899561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making plastic siding
Assignee: Certainteed LLC
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Filing: 1973-07-17
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Granted: 1975-08-12
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Expires: 1993-07-17
Abstract
Abstract The disclosed technique is adapted to production of siding from resin materials, especially polyvinyl chloride, and includes the use of sizing and shaping templates both above and below the horizontally extruded siding. Provision is made for cooling the lower convex side of the siding more rapidly than the upper concave side and for delivering refrigerated air to the siding in the downstream end of the cooling zone.
Inventors
- 👤 Peter F Heilmayr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:50
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/908; B29C48/03; B29C48/07; B29C48/911
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
252 words
IN THE METHOD OF MANUFACTURING SIDING BOARDS HAVING HANGER AND BUTT EDGES WITH AN INTERVENING PANEL BY PLASTICATING A THERMOPLASTIC RESIN MATEIAL IN A HEATED EXTRUDER, SHAPING THE PLASTICATED RESIN MATERIAL BY EXTRUDING IT THROUGH A DIE ORIFICE GENERALLY CONFORMING WITH A DESIRED CROSS SECTIONAL SHAPE OF THE SIDING, COOLING AND RIGIDIFYING THE EXTRUDED SIDING, AND CUTTING THE EXTRUDATE INTO SIDING BOARD LENGTHS, THE IMPROVEMENT WHICH COMPRISES FEEDING RIGID POLYVINYL CHLORIDE RESIN MATERIAL IN POWDER FORM TO THE EXTRUDER, EXTRUDING THE RESIN GENERALLY HORIZONTALLY THROUGH A DIE ORIFICE HAVING A MAXIMUM DIMENSION FROM 3 TO 20% LARGER THAN THE FINAL WIDTH OF THE SIDING BEING MADE AND HAVING A GLAT MID PORTION FOR FORMING THE PANEL OF THE SIDING WHICH MID PORTION OF THE ORIFICE IS OF THICKNESS OF FROM 25 TO 75% OF THE THICKNESS OF THE PANEL OF THE SIDING BEING MADE, EMBOSSING THE UPPER SIDE OF THE EXTRUDATE TO IMPART A TEXTURED SURFACE THERETO, PASSING THE EMBOSSED EXTRUDATE BETWEEN AND IN CONTACT WITH LOWER AND UPPER SERIES OF SPACED TEMPLETS RESPECTIVELY HAVING CONCAVELY CURVED EDGES AND CONVEXLY CURVED EDGES FOR CURVING THE EXTRUDATE TO A SHAPE HAVING A CONCAVE UPPER SIDE AND A CONVEX LOWER SIDE AND BRINGING THE EXTRUDATE UNIFORMLY TO THE DESIRED SIZE, DIRECTING COOLING AIR AGAINST BOTH SURFACES TO THE EXTRUDATE AS THE EXTRUDATE PASSES BETWEEN THE SPACED TEMPLETS TO COOL AND RIGIDFY THE EXTRUDATE, THE LOWER CONVEX SIDE OF THE EXTRUDATE BEARING COOLED FASTER THAN THE UPPER CONCAVE SIDE OF THE EXTRUDATE TO MINIZE WARPING,
Claim 2
Dependent Claim
252 words
IN THE METHOD OF MANUFACTURING SIDING BOARDS HAVING HANGER AND BUTT EDGES WITH AN INTERVENING PANEL BY PLASTICATING A THERMOPLASTIC RESIN MATEIAL IN A HEATED EXTRUDER, SHAPING THE PLASTICATED RESIN MATERIAL BY EXTRUDING IT THROUGH A DIE ORIFICE GENERALLY CONFORMING WITH A DESIRED CROSS SECTIONAL SHAPE OF THE SIDING, COOLING AND RIGIDIFYING THE EXTRUDED SIDING, AND CUTTING THE EXTRUDATE INTO SIDING BOARD LENGTHS, THE IMPROVEMENT WHICH COMPRISES FEEDING RIGID POLYVINYL CHLORIDE RESIN MATERIAL IN POWDER FORM TO THE EXTRUDER, EXTRUDING THE RESIN GENERALLY HORIZONTALLY THROUGH A DIE ORIFICE HAVING A MAXIMUM DIMENSION FROM 3 TO 20% LARGER THAN THE FINAL WIDTH OF THE SIDING BEING MADE AND HAVING A GLAT MID PORTION FOR FORMING THE PANEL OF THE SIDING WHICH MID PORTION OF THE ORIFICE IS OF THICKNESS OF FROM 25 TO 75% OF THE THICKNESS OF THE PANEL OF THE SIDING BEING MADE, EMBOSSING THE UPPER SIDE OF THE EXTRUDATE TO IMPART A TEXTURED SURFACE THERETO, PASSING THE EMBOSSED EXTRUDATE BETWEEN AND IN CONTACT WITH LOWER AND UPPER SERIES OF SPACED TEMPLETS RESPECTIVELY HAVING CONCAVELY CURVED EDGES AND CONVEXLY CURVED EDGES FOR CURVING THE EXTRUDATE TO A SHAPE HAVING A CONCAVE UPPER SIDE AND A CONVEX LOWER SIDE AND BRINGING THE EXTRUDATE UNIFORMLY TO THE DESIRED SIZE, DIRECTING COOLING AIR AGAINST BOTH SURFACES TO THE EXTRUDATE AS THE EXTRUDATE PASSES BETWEEN THE SPACED TEMPLETS TO COOL AND RIGIDFY THE EXTRUDATE, THE LOWER CONVEX SIDE OF THE EXTRUDATE BEARING COOLED FASTER THAN THE UPPER CONCAVE SIDE OF THE EXTRUDATE TO MINIZE WARPING,
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |