US3877140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a fence of thermoplastic pickets with embedded wire connecting links
Assignee: Individual
•
Filing: 1972-06-30
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Granted: 1975-04-15
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Expires: 1992-06-30
Abstract
Abstract An article of manufacture, particularly a fence such as a snow fence, comprises a plurality of pickets or slats with a plurality of connecting links between adjacent ones of the pickets. The fence is formed of an extruded thermoplastic material, and each of the pickets or slats has a crease formed therein, and is set or rigidified with that crease. The fence may be formed by extruding a plastic sheet, punching or cutting a plurality of openings which define the pickets and connecting links, and creasing the thermoplastic material lengthwise of each of the pickets. Alternatively, the material may be extruded with a plurality of wires embedded in its in the direction of the extrusion; and the thermoplastic sheet may then be cut across its width except for the wires, and the cut portion pulled along the wires so that the wires form connecting links between adjacent ones of the cut portions. The pickets are formed by creasing them along their axial length, together with the wires embedded therein.
Inventors
- 👤 Hermann Adolf Josef Topolsek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:56
CPC Classifications
E; E04; E04H; E04H17/00; E04H17/02; B; B29; B29C; B29C69/00; B29D; B29D28/00; E01; E01F; E01F7/00; E01F7/02; B29C48/00; B29C48/001; B29C48/0022; B29C48/03; B29C48/07; B29C48/08; B29C48/09; B29C48/11; B29C48/13; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
264 words
A method of manufacture of a fence having a plurality of pickets, each of said pickets comprising a creased bar-like component extending substantially for the full height of the fence at each said picket; said picket being substantially parallel one to another, and spaced along the length of said fence; there being a plurality of connecting links secured to each of said pickets and arranged substantially lengthwise of said fence between adjacent ones of said pickets; wherein said pickets are formed of a thermoplastic material; said method comprising the steps: a. extruding a sheet of thermoplastic material whose width is at least equal to the height of the fence to be formed at any given picket therein; where said sheet is extruded having a plurality of wires embedded lengthwise therein, the number of wires being equal to The number of links between said pickets; b. cutting said extruded sheet across its width, but not said plurality of wires, so as to form a picket portion each time a cut is made; c. clamping said wires on the side of said cut picket portion closest to the place where it is extruded, and pulling each picket portion in turn away from the place where it is cut, so as to move said picket portion longitudinally along said plurality of wires embedded in said extruded thermoplastic sheet and thereby to form said pickets and said connecting links therebetween; d. creasing said pickets and the wires embedded therein along the axial length of said pickets; and allowing said pickets to cool so as to rigidify the same.
Claim 2
Independent Claim
264 words
A method of manufacture of a fence having a plurality of pickets, each of said pickets comprising a creased bar-like component extending substantially for the full height of the fence at each said picket; said picket being substantially parallel one to another, and spaced along the length of said fence; there being a plurality of connecting links secured to each of said pickets and arranged substantially lengthwise of said fence between adjacent ones of said pickets; wherein said pickets are formed of a thermoplastic material; said method comprising the steps: a. extruding a sheet of thermoplastic material whose width is at least equal to the height of the fence to be formed at any given picket therein; where said sheet is extruded having a plurality of wires embedded lengthwise therein, the number of wires being equal to The number of links between said pickets; b. cutting said extruded sheet across its width, but not said plurality of wires, so as to form a picket portion each time a cut is made; c. clamping said wires on the side of said cut picket portion closest to the place where it is extruded, and pulling each picket portion in turn away from the place where it is cut, so as to move said picket portion longitudinally along said plurality of wires embedded in said extruded thermoplastic sheet and thereby to form said pickets and said connecting links therebetween; d. creasing said pickets and the wires embedded therein along the axial length of said pickets; and allowing said pickets to cool so as to rigidify the same.
Claim 3
Dependent Claim
17 words
The method of claim 1 where said extrusion of said thermoplastic sheet material is a continuous process.
Claim 4
Dependent Claim
19 words
The method of claim 2 further comprising the step of: reeling said fence after it is formed and cooled.
Claim 5
Dependent Claim
25 words
The method of claim 2 further comprising the step of: heating said plurality of wires before they are embedded in said extruded thermoplastic sheet material.
References Cited (Backward Citations)
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |