Patents Assigned to C-Eng Co., Ltd.
  • Patent number: 10328618
    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.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: June 25, 2019
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 10266977
    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.
    Type: Grant
    Filed: October 16, 2015
    Date of Patent: April 23, 2019
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 10233073
    Abstract: A three-dimensional striped structure is provided which is formed by bonding continuous filaments in random in loops, has a longitudinal direction corresponding to an extruding direction, a lateral direction and a thickness direction perpendicular to the extruding direction, and is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer. The three dimensional striped structure has an impact resilience of not lower than 13 cm, a hysteresis loss of not higher than 34% and not lower than 13%, and a thermal expansion rate of 0 to 8% in the longitudinal direction before and after a hot-air drying test, and does not shrink during high-temperature sterilization.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: March 19, 2019
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Publication number: 20180086623
    Abstract: A three-dimensional striped structure is provided which is formed by bonding continuous filaments in random in loops, has a longitudinal direction corresponding to an extruding direction, a lateral direction and a thickness direction perpendicular to the extruding direction, and is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer.
    Type: Application
    Filed: May 27, 2016
    Publication date: March 29, 2018
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Patent number: 9918559
    Abstract: By taking into account the difficulty in smoothly bending along the shape of, for example, a care bed, there is provided a three-dimensional net-like structure made from polyethylene having a swelling ratio dependent on a shear rate such as to be 0.93 to 1.16 at a shear rate of 24.3 sec?1 and 1.15 to 1.34 at a shear rate of 608 sec?1 and having an MFR of 3 to 35 g/10 min and a density of 0.82 to 0.95 g/cm3 and configured to have a spring structure of filaments randomly brought into contact with and tangled with one another, have a three-dimensional striped sparse-dense configuration in a lateral direction relative to an extrusion direction. The swelling ratio is shown as D2/D1 against shear rate when a molten thermoplastic resin is extruded to filaments from a capillary having a tube inner diameter D1 of 1.0 mm and a length of 10 mm and D2 denotes a diameter of cross section of the filaments extruded and cooled down.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: March 20, 2018
    Assignee: C-ENG CO., LTD.
    Inventor: Hiroko Osaki
  • Patent number: 9918560
    Abstract: By taking into account the difficulty in smoothly bending along the shape of, for example, a care bed, there is provided a three-dimensional net-like structure made from polyester having a swelling ratio dependent on a shear rate such as to be 1.10 to 1.38 at a shear rate of 60.8 sec?1 and 1.17 to 1.43 at a shear rate of 608 sec?1 and having an MFR of 3 to 35 g/10 min and a density of 1.01 to 1.60 g/cm3 and configured to have a spring structure of filaments randomly brought into contact with and tangled with one another, have a three-dimensional striped sparse-dense configuration in a lateral direction relative to an extrusion direction. The swelling ratio is shown as D2/D1 against shear rate when a molten thermoplastic resin is extruded to filaments from a capillary having a tube inner diameter D1 of 1.0 mm and a length of 10 mm and D2 denotes a diameter of cross section of the filaments extruded and cooled down.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: March 20, 2018
    Assignee: C-ENG CO., LTD.
    Inventor: Hiroko Osaki
  • Patent number: 9615670
    Abstract: An object is to provide a hygienic cushion that has an adequate thickness to provide the repulsive force of or above a specified level and the body-holding property, is light in weight, has excellent air permeability and is washable with water. The core material for cushion 1 comprising the three-dimensional net-like structure, which is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer. The three-dimensional net-like structure has a first layer that includes a thermoplastic resin and a second layer that is stacked on a single surface or both surfaces of the first layer and includes a thermoplastic resin different from the thermoplastic resin of the first layer.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: April 11, 2017
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 9598803
    Abstract: A method for forming cushions including the following four steps: (1) a compression step in which the structure (2) is compressed in a mold (3); (2) a thermal softening step in which the structure (2) is thermally softened by means of a heating medium; (3) a curing step in which the structure (2) directly undergoes forced cooling in a cooling medium, and is then cured; and (4) a mold release step in which the structure (2) is released from the mold (3).
    Type: Grant
    Filed: January 28, 2014
    Date of Patent: March 21, 2017
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 9561612
    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.
    Type: Grant
    Filed: September 14, 2015
    Date of Patent: February 7, 2017
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 9528209
    Abstract: A manufacturing apparatus of three-dimensional net-like structure includes: a nozzle with a plurality of extrusion holes that are arrayed to extrude and drop downward a thermoplastic synthetic resin in a molten state and thereby form a filament assembly of a plurality of filaments; a pair of chutes arranged across longitudinal faces of the filament assembly to have inclined surfaces that are sloped toward the filament assembly and opposed to each other across a distance that is less than a short side length of the array of the extrusion holes; water supply ports arranged to supply cooling water to the inclined surfaces; and a pair of haul-off machines configured to have endless belts arranged to be in contact with the longitudinal faces of the filament assembly and haul off the filament assembly and opposed to each other across a less distance than the distance between the pair of chutes.
    Type: Grant
    Filed: March 9, 2013
    Date of Patent: December 27, 2016
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Publication number: 20160263802
    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.
    Type: Application
    Filed: September 14, 2015
    Publication date: September 15, 2016
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Patent number: 9440390
    Abstract: The object is to improve the production efficiency of three-dimensional net-like structures while maintaining the surface quality of the three-dimensional net-like structures. A second chute 6 is located below a hole-free region 33 and is provided between first chutes 4a and 4b. Filaments 20a and 20b located on longitudinal sides 22b and 22c at the periphery of assemblies 21a and 21b are in contact with the upper side of inclined surfaces 46a and 46b of the second chute 6. Such contact disturbs the vertical fall of the filaments 20a and 20b and causes the filaments 20a and 20b to be tangled in loops with the adjacent filaments 20a and 20b and pass through the first chutes 4a and 4b and the second chute 6, while being cooled down with water supplied from openings 51a, 51b and 51c.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: September 13, 2016
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Publication number: 20160174725
    Abstract: An object is to provide a hygienic cushion that has an adequate thickness to provide the repulsive force of or above a specified level and the body-holding property, is light in weight, has excellent air permeability and is washable with water. The core material for cushion 1 comprising the three-dimensional net-like structure, which is comprised of a polyethylene thermoplastic resin, a polyester thermoplastic elastomer or a mixture of a polyethylene thermoplastic resin and a polyethylene thermoplastic elastomer. The three-dimensional net-like structure has a first layer that includes a thermoplastic resin and a second layer that is stacked on a single surface or both surfaces of the first layer and includes a thermoplastic resin different from the thermoplastic resin of the first layer.
    Type: Application
    Filed: February 23, 2015
    Publication date: June 23, 2016
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Publication number: 20160032506
    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.
    Type: Application
    Filed: October 16, 2015
    Publication date: February 4, 2016
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Publication number: 20160023387
    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.
    Type: Application
    Filed: September 10, 2015
    Publication date: January 28, 2016
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki TAKAOKA
  • Patent number: 9194066
    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.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 24, 2015
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 9174404
    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.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 3, 2015
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Patent number: 9169585
    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.
    Type: Grant
    Filed: October 8, 2013
    Date of Patent: October 27, 2015
    Assignee: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Publication number: 20150284894
    Abstract: Framework-like structures suffer from a problem in that transport costs are increased because bulk density is low. A mattress (1) composed of a framework-like structure is placed in a bag (2) for compression, a zipper of the bag (2) for compression is closed, a suction port of a suction device such as a vacuum cleaner is brought into contact with a non-return valve and air is suctioned out to thereby place and seal the mattress, which is in a compressed state, in a vacuum state and compress the thickness of the mattress (1). An airtight state at 65° C. is subsequently maintained inside a container during transport. After transport, the zipper of the bag (2) for compression is opened, and the mattress (1) having been extracted from the bag (2) for compression is placed in a hot-air tank and restored in an atmosphere of 85° C.
    Type: Application
    Filed: July 12, 2013
    Publication date: October 8, 2015
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka
  • Publication number: 20150197056
    Abstract: The object is to improve the production efficiency of three-dimensional net-like structures while maintaining the surface quality of the three-dimensional net-like structures. A second chute 6 is located below a hole-free region 33 and is provided between first chutes 4a and 4b. Filaments 20a and 20b located on longitudinal sides 22b and 22c at the periphery of assemblies 21a and 21b are in contact with the upper side of inclined surfaces 46a and 46b of the second chute 6. Such contact disturbs the vertical fall of the filaments 20a and 20b and causes the filaments 20a and 20b to be tangled in loops with the adjacent filaments 20a and 20b and pass through the first chutes 4a and 4b and the second chute 6, while being cooled down with water supplied from openings 51a, 51b and 51c.
    Type: Application
    Filed: August 27, 2013
    Publication date: July 16, 2015
    Applicant: C-ENG CO., LTD.
    Inventor: Nobuyuki Takaoka