Patents by Inventor Hendrik Middeljans
Hendrik Middeljans has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8182915Abstract: A method is provided for spinning a multifilament thread from a thermoplastic material, including the steps of extruding the melted material through a spinneret with a plurality of spinneret holes into a filament bundle with a plurality of filaments, winding the filaments as thread after solidifying, and cooling the filament bundle beneath the spinneret, whereby in a first cooling zone the gaseous cooling medium is directed in such a way that it flows through the filament bundle transversely, the cooling medium leaving the filament bundle practically completely on the side opposite the inflow side, and in a second cooling zone beneath the first cooling zone, the filament bundle being cooled further essentially through self-suction of the gaseous cooling medium surrounding the filament bundle.Type: GrantFiled: March 26, 2010Date of Patent: May 22, 2012Assignee: Diolen Industrial Fibers B.V.Inventors: Hendrik Middeljans, Eric Heuveling, Bastiaan Krins, Johannes Frederick Boer
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Publication number: 20100175361Abstract: A method is provided for spinning a multifilament thread from a thermoplastic material, including the steps of extruding the melted material through a spinneret with a plurality of spinneret holes into a filament bundle with a plurality of filaments, winding the filaments as thread after solidifying, and cooling the filament bundle beneath the spinneret, whereby in a first cooling zone the gaseous cooling medium is directed in such a way that it flows through the filament bundle transversely, the cooling medium leaving the filament bundle practically completely on the side opposite the inflow side, and in a second cooling zone beneath the first cooling zone, the filament bundle being cooled further essentially through self-suction of the gaseous cooling medium surrounding the filament bundle.Type: ApplicationFiled: March 26, 2010Publication date: July 15, 2010Applicant: DIOLEN INDUSTRIAL FIBERS B.V.Inventors: Hendrik MIDDELJANS, Eric HEUVELING, Bastiaan KRINS, Johannes Frederik BOER
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Patent number: 7731876Abstract: A method is provided for spinning a multifilament thread from a thermoplastic material, including the steps of extruding the melted material through a spinneret with a plurality of spinneret holes into a filament bundle with a plurality of filaments, winding the filaments as thread after solidifying, and cooling the filament bundle beneath the spinneret, whereby in a first cooling zone the gaseous cooling medium is directed in such a way that it flows through the filament bundle transversely, the cooling medium leaving the filament bundle practically completely on the side opposite the inflow side, and in a second cooling zone beneath the first cooling zone, the filament bundle being cooled further essentially through self-suction of the gaseous cooling medium surrounding the filament bundle.Type: GrantFiled: June 26, 2003Date of Patent: June 8, 2010Assignee: Diolen Industrial Fibers B.V.Inventors: Hendrik Middeljans, Eric Heuveling, Bastiaan Krins, Johannes Frederik Boer
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Publication number: 20050147814Abstract: A method is provided for spinning a multifilament thread from a thermoplastic material, comprising the steps of extruding the melted material through a spinneret with a plurality of spinneret holes into a filament bundle with a plurality of filaments, winding the filaments as thread after solidifying, and cooling the filament bundle in two steps beneath the spinneret, whereby in a first cooling zone the gaseous cooling medium is directed in such a way that it flows through the filament bundle transversely the method being characterized in that the cooling medium leaves the filament bundle practically completely on the side opposite the inflow side, and in a second cooling zone beneath the first cooling zone the filament bundle being cooled further essentially through self-suction of the gaseous cooling medium surrounding the filament bundle.Type: ApplicationFiled: June 26, 2003Publication date: July 7, 2005Applicant: DIOLEN INDUSTRIAL FIBERS B.V.Inventors: Hendrik Middeljans, Eric Heuveling, Bastiaan Krins, Johannes Boer
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Patent number: 6495075Abstract: The invention pertains to a process for preparing thermoplastic fibres by melt-spinning an alternating co-polymer composed of alkenes and carbon monoxide in which the polymer is heated to a temperature of at least TNF+5° C.Type: GrantFiled: July 28, 2000Date of Patent: December 17, 2002Assignee: Acordis Industrial Fibers BVInventors: Hendrik Middeljans, Jannes Veurink, Johannes A. Juijn
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Patent number: 5618480Abstract: Multifilament yarn, monofilament, or film, formed at least substantially of polyethylene naphthalate, has a strength of at least 400 MN/tex and a DSC melting point of at least 292.degree. C., where the DSC melting point is measured on a sample quantity of 2.5 mg at a heating rate of 20.degree. C. per min. For production, melted polyethylene naphthalate is extruded from a multi-hole spinneret, the filaments or film, solidified by cooling, are/is withdrawn at a rate of 500 to 10,000 m/min, where the filaments or film are/is subjected to a draw-down B of 40 to 25,000 from the spinneret output to the first withdrawal element. The polymer used may contain at least 85% by weight polyethylene naphthalate and have a melt flow index of 3 to 26.Type: GrantFiled: June 7, 1995Date of Patent: April 8, 1997Assignee: Akzo Nobel N.V.Inventors: Christiaan J. M. Van Den Heuvel, Anton P. De Weijer, Hendrik Middeljans, Herman M. Heuvel
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Patent number: 5466525Abstract: Multifilament yarn, monofilament, or film, formed at least substantially of polyethylene naphthalate, has a strength of at least 400 mN/tex and a DSC melting point of at least 292.degree. C., where the DSC melting point is measured on a sample quantity of 2.5 mg at a heating rate of 20.degree. C. per min. For production, melted polyethylene naphthalate is extruded from a multi-hole spinneret, the filaments or film, solidified by cooling, are/is withdrawn at a rate of 500 to 10,000 m/min, where the filaments or film are/is subjected to a draw-down B of 40 to 25,000 from the spinneret output to the first withdrawal element. The polymer used may contain at least 85% by weight polyethylene naphthalate and have a melt flow index of 3 to 26.Type: GrantFiled: June 20, 1994Date of Patent: November 14, 1995Assignee: Akzo Nobel N.V.Inventors: Christiaan J. Maria, Anton P. De Weijer, Hendrik Middeljans, Herman M. Heuvel