Patent US3932092A successfully refreshed from Google Patents.
US3932092A
Expired / Lapsed
US
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Apparatus for making plastics mesh structures and other forms of openwork
Assignee: GENERALE ALIMENTAIRE
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Filing: 1974-08-21
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Granted: 1976-01-13
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Expires: 1994-08-21
Abstract
Abstract A plastics mesh structure comprises continuous filaments in the longitudinal direction and discontinuous connecting strands in the lateral direction.
Inventors
- 👤 Jean-Claude Hureau
- 👤 Benjamin Rota
- 👤 Philippe Thomas-Castelnau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:04
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/30; B29C48/301; B29C48/03; B29C48/05; B29C48/07; B29C48/08; B29C48/09; B29C48/10; B29C48/13; B29C48/12; B29L; B29L2028/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
222 words
An apparatus for making plastics mesh structures and other forms of extruded plastics openwork, characterized in that it comprises an extrusion head adapted to be fed with plastics from an appropriate source such as an extruder, the head comprising: a. means, including a filament extruding die member having a row of continuously open extrusion orifices distributed in one plane in spaced apart relation, for extruding a plurality of continuous filaments parallel to the direction of extrusion and transversely spaced apart; b. a strand extruding die member having a row of spaced apart extrusion slits distributed in a plane different from the plane of the extrusion orifices, each extrusion slit being in length at least as great as the spacing between two adjacent extrusion orifices but less than the entire extent across all of the extrusion orifices; and c. means, including a blade associated with the strand extruding die member and mounted for reciprocation relative to the extrusion slits therein between a first position at which the slits are open and a second position at which the slits are closed, for separately extruding, periodically and transversely of the continuous filaments, strands that are discontinuous in a transverse direction and extend across less than all of the plurality of continuous filaments, and for urging the extruded strands into engagement with the extruded continuous filaments.
Claim 2
Independent Claim
222 words
An apparatus for making plastics mesh structures and other forms of extruded plastics openwork, characterized in that it comprises an extrusion head adapted to be fed with plastics from an appropriate source such as an extruder, the head comprising: a. means, including a filament extruding die member having a row of continuously open extrusion orifices distributed in one plane in spaced apart relation, for extruding a plurality of continuous filaments parallel to the direction of extrusion and transversely spaced apart; b. a strand extruding die member having a row of spaced apart extrusion slits distributed in a plane different from the plane of the extrusion orifices, each extrusion slit being in length at least as great as the spacing between two adjacent extrusion orifices but less than the entire extent across all of the extrusion orifices; and c. means, including a blade associated with the strand extruding die member and mounted for reciprocation relative to the extrusion slits therein between a first position at which the slits are open and a second position at which the slits are closed, for separately extruding, periodically and transversely of the continuous filaments, strands that are discontinuous in a transverse direction and extend across less than all of the plurality of continuous filaments, and for urging the extruded strands into engagement with the extruded continuous filaments.
Claim 3
Dependent Claim
31 words
An apparatus as described in claim 1 further comprising a cooling template for simultaneous two-directional orientation and cooling of the extruded mesh structure to impart a final shape and orientation thereto.
Claim 4
Dependent Claim
45 words
An apparatus as described in claim 1, wherein the transverse length of each extrusion slit is substantially equal to the spacing between the extrusion orifices such that each strand may be urged into engagement with two adjacent continuous filaments and engaged by its ends thereto.
Claim 5
Dependent Claim
41 words
An apparatus according to claim 1, wherein the extruding and urging means includes two complementary blades associated with the strand extruding die member, one blade reciprocating past some of the extrusion slits and the other blade reciprocating past the remainder thereof.
Claim 6
Independent Claim
298 words
An apparatus for making plastics mesh structures and other forms of extruded plastics openwork, characterized in that it comprises an extrusion head adapted to be fed with plastics from an appropriate source such as an extruder, the head comprising: a. means, including a filament extruding die member having a row of continuously open extrusion orifices distributed in one plane in spaced apart relation, for extruding a plurality of continuous filaments parallel to the direction of extrusion and transversely spaced apart; b. two strand extruding die members, disposed one above and one below the filament extruding die member, each strand extruding die member having a row of spaced apart extrusion slits distributed in a plane different from the plane of the extrusion orifices, wherein the extrusion slits of each strand extruding die member are each in length at least as great as the spacing between two adjacent extrusion orifices but less than the entire transverse extent across all of the extrusion orifices, and wherein the extrusion slits of one strand extruding die member are offset from the extrusion slits of the other strand extruding die member; and c. means, including two moving blades, each associated with a respective one of the two strand extruding die members and mounted for reciprocation relative to the extrusion slits therein between a first position at which the extrusion slits are open and a second position at which the extrusion slits are closed, for seaprately extruding, periodically and transversely of the continuous filaments, two corresponding sets of strands, one set above and the other below the plurality of extruded continuous filaments, said strands being discontinuous in a transverse direction and extending across less than all of the plurality of continuous filaments, and for urging the extruded strands into engagement with the extruded continuous filaments.
Claim 7
Independent Claim
298 words
An apparatus for making plastics mesh structures and other forms of extruded plastics openwork, characterized in that it comprises an extrusion head adapted to be fed with plastics from an appropriate source such as an extruder, the head comprising: a. means, including a filament extruding die member having a row of continuously open extrusion orifices distributed in one plane in spaced apart relation, for extruding a plurality of continuous filaments parallel to the direction of extrusion and transversely spaced apart; b. two strand extruding die members, disposed one above and one below the filament extruding die member, each strand extruding die member having a row of spaced apart extrusion slits distributed in a plane different from the plane of the extrusion orifices, wherein the extrusion slits of each strand extruding die member are each in length at least as great as the spacing between two adjacent extrusion orifices but less than the entire transverse extent across all of the extrusion orifices, and wherein the extrusion slits of one strand extruding die member are offset from the extrusion slits of the other strand extruding die member; and c. means, including two moving blades, each associated with a respective one of the two strand extruding die members and mounted for reciprocation relative to the extrusion slits therein between a first position at which the extrusion slits are open and a second position at which the extrusion slits are closed, for seaprately extruding, periodically and transversely of the continuous filaments, two corresponding sets of strands, one set above and the other below the plurality of extruded continuous filaments, said strands being discontinuous in a transverse direction and extending across less than all of the plurality of continuous filaments, and for urging the extruded strands into engagement with the extruded continuous filaments.
Claim 8
Dependent Claim
28 words
An apparatus as described in claim 4, wherein the two moving blades are arranged to simultaneously reciprocate in opposite directions in relation to the strand extruding die members.
Claim 9
Dependent Claim
29 words
An apparatus as described in claim 4, wherein the two moving blades are arranged to simultaneously reciprocate in the same direction in relation to the strand extruding die members.
Claim 10
Dependent Claim
24 words
An apparatus as described in claim 4, wherein the transverse length of each extrusion slit is greater than the spacing between the extrusion orifices.
Claim 11
Dependent Claim
32 words
An apparatus as described in claim 4, wherein the extrusion slits formed in at least one of the strand extruding die members are connected to the extrusion orifices by strand extruding passages.
Claim 12
Dependent Claim
45 words
An apparatus as described in claim 4, wherein the transverse length of each extrusion slit is substantially equal to the spacing between the extrusion orifices such that each strand may be urged into engagement with two adjacent continuous filaments and engaged by its ends thereto.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |