US3616080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for extrusion of strengthened plastic netting
Assignee: US Netting Inc
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Filing: 1963-12-27
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Granted: 1971-10-26
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Expires: 1983-12-27
Abstract
Abstract A method and apparatus for extruding strengthened plastic filaments of elongated cross section under increased pressurization as die holes are aligned and so as to intersect the extruded strands in a substantially oxygen-free environment.
Inventors
- 👤 George S Nalle Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:24
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/03; B29C48/13; B29C48/25; B29C48/36; B29C48/05; B29C48/09; B29C48/10; B29C48/30; B29C48/32; B29C48/33; B29C48/345; B29L; B29L2028/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
46 words
The apparatus of claim 1 for producing tubular nettIng wherein said first and second dies are circular and are concentrically rotatable about a single axis, disposed as an outer and inner die structure, and wherein said extrusion orifices are aligned concentrically in each of said dies.
Claim 2
Dependent Claim
40 words
The apparatus of claim 2 including a coolant beneath said die and means below said die in said coolant to move the filaments extruding from said orifices laterally to set the plastic in the desired diameter of the tubular netting.
Claim 3
Dependent Claim
32 words
The apparatus of claim 2 wherein said recess is defined by convergent and divergent wall sections in the inner edge of the outer die and the outer edge of the inner die.
Claim 4
Dependent Claim
16 words
The apparatus of claim 1 including a circular spreading mandrel in axial alignment with said dies.
Claim 5
Dependent Claim
29 words
The apparatus of claim 1 including means for increasing pressurization of said plastic when said orifices of said first die and said orifices of said second die are aligned.
Claim 6
Dependent Claim
28 words
The apparatus of claim 1 wherein said extrusion orifices of said first and second dies are downwardly inclined with respect to each other forming an obtuse angle therebetween.
Claim 7
Dependent Claim
12 words
The apparatus of claim 1 wherein said extrusion orifices are horizontally opposed.
Claim 8
Dependent Claim
14 words
The apparatus of claim 1 wherein said extrusion orifices are of semicircular cross section.
Claim 9
Dependent Claim
14 words
The apparatus of claim 1 wherein said extrusion orifices are of ellipsoidal cross section.
Claim 10
Dependent Claim
248 words
In a plastic mesh-producing machine, the combination of: a plurality of individually and relatively movable hot plastic extrusion dies, each having a plurality of spaced-apart plastic extrusion orifices provided with extruding open ends having extruding axes; said orifices being arranged in annular rows in each of said dies with all of said rows of all of said dies being concentric with each other; said open ends of said orifices of each die spaced from the respective open ends of the orifices of an adjacent one of said dies, said open ends of the orifices of one of said dies directed toward the open ends of the orifices of another of said dies to cause extrusion impingement and welding of hot plastic issuing therefrom with the hot plastic issuing from orifices of said one of said dies; said open ends of said orifices disposed such that said impingement and welding occurs outside said dies in free space; one of said rows of orifices of one die being directed axially parallel toward orifices of another of said dies, such that plastic issuing from said dies impinges in opposite directions to thereby form an efficient fusion weld of the hot plastic issuing from the orifices of another of said dies; first means for forcing hot plastic under pressure to each of said dies and through said orifices to form plastic filaments; and means for causing relative movement of said dies in a direction laterally of the extrusion axes of said orifices.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |