Three dimensional netted structure
AssigneeC-Eng Co., Ltd.
InventorNobuyuki Takaoka
Life of this patent
Estimating the term…
Abstract
A three-dimensional netted structure having an upper surface, a lower surface, two side surfaces a left end surface, and a right end surface, including at least a plurality of filaments helically and randomly entangled and thermally bonded together, wherein the filaments are formed out of a thermoplastic resin by extrusion molding followed by cooling with a liquid; and the netted structure is four-surface molded, the upper surface, the lower surface and the two side surfaces being molded. An apparatus and a method for manufacturing the three-dimensional netted structure.
Claims15
A three-dimensional netted structure having an upper surface, a lower surface, two side surfaces, a left end surface, and a right end surface, the structure comprising a plurality of filaments helically and randomly entangled and thermally bonded together, wherein:
- said filaments are formed out of a thermoplastic resin by extrusion molding followed by cooling in a liquid;
- said upper surface and said lower surface are molded;
- the structure has a pattern of sparse and dense portions, wherein said upper surface and said lower surface have a higher density than a density of inner portions that are adjacent to said upper surface and said lower surface;
- said pattern of sparse and dense portions is formed by cooling in a liquid;
- and
- a side view of a single loop of a filament in said upper surface and said lower surface is bent along a horizontal direction from an entangled portion of said filament to have a bending degree between 5 and 20 degrees.
A three-dimensional netted structure having an upper surface, a lower surface, two side surfaces, a left end surface, and a right end surface, the structure comprising a plurality of filaments helically and randomly entangled and thermally bonded together, wherein:
- said plurality of filaments are formed out of a thermoplastic resin by extrusion molding followed by cooling in a liquid;
- and
- said upper surface and said lower surface are molded;
- said upper surface and said lower surface are flat;
- regions of the three-dimensional netted structure, which extend a predetermined distance from said upper surface and said lower surface into an inner portion of the three-dimensional netted structure are compressed;
- a density of said regions is higher than a density of said inner portion of the three-dimensional netted structure;
- and a side view of a single loop of a filament in said upper surface and said lower surface is bent along a horizontal direction from an entangled portion of the filament to have a bending degree between 5 and 20 degrees.
A three-dimensional netted structure comprising a first part, a second part, and a third part, wherein:
- said first part comprises an first surface and a first plurality of filaments;
- said second part comprises a second surface and a second plurality of filaments;
- said third part is disposed between said first part and said second part and comprises a third plurality of filaments;
- said first plurality of filaments is helically and randomly entangled and thermally bonded to one another;
- said second plurality of filaments is helically and randomly entangled and thermally bonded to one another;
- said third plurality of filaments is helically and randomly entangled and thermally bonded to one another;
- said first surface and said second surface are molded;
- a density of said first part and a density of said second part are higher than a density of said third part;
- each of said first plurality of filaments is bent from the said first surface toward said inner part;
- each of said second plurality of filaments is bent from said second surface toward said inner part;
- each of said first plurality of filaments comprises a first end and a second end;
- a first bending degree between said first surface and a line connecting said first end and said second end is between 5 and 20 degrees;
- each of said second plurality of filaments comprises a third end and a fourth end;
- and
- a second bending degree between said second surface and a line connecting said third end and said fourth end is between 5 and 20 degrees.
Dependencies are inferred from the claim text.