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US 4,952,265 AGranted
Mat consisting of filament loop aggregations and method and apparatus for producing the same
AssigneeKabushiki Kaisha Risuron
InventorsMinoru Yamanaka, Tetsuo Amawa
Life of this patent
Estimating the term…
Abstract
In this mat consisting of filament loop aggregations, irregular form loops are formed in the upright direction by respectively winding to be coil-like many filaments coarse in the arranging intervals and made of a thermoplastic synthetic resin and are fused in the intersecting parts and the other loops are formed in the laterally fallen direction and are fused in the overlapping parts.
Claims16
A method of producing a mat comprised of a plurality of filaments comprising the steps of:
- extruding a plurality of resin filaments from an extruder such that said filaments fall toward a cooling liquid held at a temperature of 60 to 80 degrees centigrade;
- heating the filaments as they fall toward the cooling liquid to keep said filaments at least close to their extrusion temperature;
- maintaining the surface of the cooling liquid in a boiling state thereby causing said filaments to loop and bond at a plurality of points upon reaching the surface of said cooling liquid, said boiling action causing said filaments to bond at more points than would normally occur absent such boiling;
- regulating the width of the filament loop aggregation created when said filaments loops and bond in the cooling liquid surface by means of a first pair of regulating means, said first pair of regulating means being situated opposite each other near the surface of said cooling liquid;
- and
- regulating the width of said filament loop aggregation as it sinks under the surface of said cooling liquid by means of a second pair of regulating rollers having a plurality of engaging pins.
3 more elements
A method of producing a mat comprised of a plurality of filaments comprising the steps of:
- extruding a plurality of resin filaments such that they fall toward a cooling liquid held at a temperature of 60 to 80 degrees centigrade;
- heating the filaments as they fall toward the cooling liquid to keep said filaments at least close to their extrusion temperature;
- maintaining the surface of the cooling liquid in a boiling state thereby causing said filaments to loop and bond at a plurality of points upon reaching the surface of said cooling liquid, said boiling action causing said filaments to bond at more points then would normally occur absent such boiling;
- regulating width of the filament loop aggregation created when said filaments loop and bond on the cooling liquid surface by means of a first pair of regulating means, said first pair of regulating means being situated opposite each other near the surface of said cooling liquid and causing the tip of each filament loop to bend and bond against the tip of a neighboring filament loop so that the outside edges of the filament loop aggregations are comprised of slightly bent and bonded filament loop ends.
1 more element
A method of producing a mat comprised of a plurality of filaments comprising the steps of:
- extruding of plurality of resin filaments such that said filaments fall toward a cooling liquid held at a temperature of 60 to 80 degrees centigrade;
- heating the filaments as they fall toward the cooling liquid to keep said filaments at least close to their extrusion temperature;
- maintaining the surface of the cooling liquid in a boiling state in part through the receipt of the heated filaments into the cooling liquid, said boiling state causing said filaments to loop and bond at a plurality of points upon reaching the surface of said cooling liquid, said boiling action causing said filaments to form irregular filament loops thereby causing them to bond at more points than would normally occur absent such boiling;
- regulating the width of the filament loop aggregation created when said filaments loop and bond in the cooling liquid surface by means of a first pair of regulating means, said first pair of regulating means being situated opposite each other near the surface of said cooling liquid;
- and
- regulating the width of said filament loop aggregation as it sinks under the surface of said cooling liquid by means of a second pair of regulating rollers having a plurality of engaging pins.
3 more elements
Dependencies are inferred from the claim text.