Patents by Inventor Stewart Hay

Stewart Hay 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).

  • Patent number: 9186596
    Abstract: Odorant from a process stream is removed by passing the stream (18) to a counter-current contacting device (12) for stripping odorants. The odorants passes from the contacting device (12) as contaminated steam (26) while the remaining process stream passes directly to a “tube side” of a falling film evaporator (14) and is heated producing steam that passes into the counter-current contacting device (12) to strip that process stream and produce the contaminated steam (26). This contaminated steam from the contacting device (12) passes through a vapor compression step (16) from which it is introduced into a “shell side” of the falling film evaporator (14) and in which it heats the process stream passing from the contacting device (12) into the evaporator (14). The contaminated steam that is not condensed in the falling film evaporator passes as a low flow vent gas (50) in which the odorants have been concentrated.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: November 17, 2015
    Assignee: Alcoa of Australia Limited
    Inventor: Peter Stewart Hay
  • Publication number: 20120175240
    Abstract: Odorant from a process stream is removed by passing the stream (18) to a counter-current contacting device (12) for stripping odorants. The odorants passes from the contacting device (12) as contaminated steam (26) whilst the remaining process stream passes directly to a “tube side” of a falling film evaporator (14) and is heated producing steam that passes into the counter-current contacting device (12) to strip that process stream and produce the contaminated steam (26). This contaminated steam from the contacting device (12) passes through a vapour compression step (16) from which it is introduced into a “shell side” of the falling film evaporator (14) and in which it heats the process stream passing from the contacting device (12) into the evaporator (14). The contaminated steam that is not condensed in the falling film evaporator passes as a low flow vent gas (50) in which the odorants have been concentrated.
    Type: Application
    Filed: February 17, 2011
    Publication date: July 12, 2012
    Applicant: ALCOA OF AUSTRALIA LIMITED
    Inventor: Peter Stewart Hay
  • Patent number: 7487805
    Abstract: A triple layer papermaker's fabric includes: a set of top MD yarns; a set of top CMD yarns interwoven with the top MD yarns to form a top fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; and a set of stitching yarn pairs that interweave with the top MD yarns, wherein at least one of the yarns of each stitching yarn pair interweaves with the bottom MD yarns. The top MD yarns and the top CMD yarns are interwoven in a series of repeat units and the bottom MD yarns and the bottom CMD yarns are interwoven in a series of corresponding repeat units. The set of top MD yarns comprises a first number of top MD yarns in each repeat unit, and the set of bottom MD yarns comprises a second number of bottom MD yarns in each repeat unit, wherein the second number being greater than the first number. Each bottom MD yarn follows a different interweaving pattern than that followed by each of its two immediate neighboring bottom MD yarns.
    Type: Grant
    Filed: January 31, 2007
    Date of Patent: February 10, 2009
    Assignee: Weavexx Corporation
    Inventors: Christine Barratte, Stewart Hay, Kevin John Ward
  • Publication number: 20080178958
    Abstract: A triple layer papermaker's fabric includes: a set of top MD yarns; a set of top CMD yarns interwoven with the top MD yarns to form a top fabric layer; a set of bottom MD yarns; a set of bottom CMD yarns interwoven with the bottom MD yarns to form a bottom fabric layer; and a set of stitching yarn pairs that interweave with the top MD yarns, wherein at least one of the yarns of each stitching yarn pair interweaves with the bottom MD yarns. The top MD yarns and the top CMD yarns are interwoven in a series of repeat units and the bottom MD yarns and the bottom CMD yarns are interwoven in a series of corresponding repeat units. The set of top MD yarns comprises a first number of top MD yarns in each repeat unit, and the set of bottom MD yarns comprises a second number of bottom MD yarns in each repeat unit, wherein the second number being greater than the first number. Each bottom MD yarn follows a different interweaving pattern than that followed by each of its two immediate neighboring bottom MD yarns.
    Type: Application
    Filed: January 31, 2007
    Publication date: July 31, 2008
    Inventors: Christine Barratte, Stewart Hay, Kevin John Ward
  • Publication number: 20060243339
    Abstract: A paper machine fabric has a paper side warp layer and a machine side warp layer. The fabric comprises at least one set of paper side wefts interlaced with the paper side warps and at least one set of machine side wefts interlocked with the machine side warps. The fabric further comprises at least one pair of interchanging weft binders, the members of each weft binder pair together forming one continuous weft path on the paper side, each of said members of all of said weft binder pairs interweaving with at least one paper side warp and at least one machine side warp. At least one weft binder yarn of at least one binder pair interlocks in an unlocked position with at least one warp yarn of the machine side of the fabric.
    Type: Application
    Filed: May 12, 2004
    Publication date: November 2, 2006
    Inventor: Stewart Hay
  • Publication number: 20060231154
    Abstract: A composite forming fabric comprising a paper side layer having a paper side surface, a machine side layer having a bottom wear side surface, and a plurality of pairs of first and second interchanging yarns, wherein: the paper side layer and the machine side layer each comprise warp yarns and weft yarns woven together; said paper side layer and said machine side layer each having a predetermined repeat of the weave pattern in the cross-machine-direction; each pair of first and second interchanging yarns having at least two segments in the paper side layer within each repeat of the weave pattern, said segments providing an unbroken weft path in the paper side surface, with each succeeding segment being separated in the paper side surface of the paper side layer by at least one paper side layer transitional warp yarn; at least one pair of first and second interchanging yarns within each repeat of the weave pattern being binder yarn pairs, each binder yarn in each binder yarn pair binding together the paper side
    Type: Application
    Filed: February 27, 2004
    Publication date: October 19, 2006
    Inventor: Stewart Hay
  • Publication number: 20060219312
    Abstract: A composite forming fabric (10) comprising a paper side layer (12) having a paper side surface, a machine side layer (14) having a bottom wear side surface, and a plurality of pairs of first and second intrinsic, interchanging weft binder yarns (16, 18, 20, . . . 34) for binding together the paper side layer (12) and the machine side layer (14). At least of said plurality of pairs of first and second intrinsic, interchanging weft binder yarns have at least four segments (S1-S4) in the paper side layer (12) within each repeat of the weave pattern in the fabric, and these segments provide an unbroken weft path in the paper side surface. Each of the first and second intrinsic, interchanging weft binder yarns (16, 18, 20, . . . 34) of each binder pair having at least four segments (S1-S4) in the paper side layer (12) within each repeat of the weave pattern binds to at least one warp yarn (2-20) in the machine side layer (14) vertically underlying one of the segments (S1-S4).
    Type: Application
    Filed: June 8, 2004
    Publication date: October 5, 2006
    Inventors: Stewart Hay, Scott Quigley
  • Publication number: 20060075737
    Abstract: Monofilament yarn for use in an industrial textile, in which the yarn has a bi-nodal cross section, and an industrial fabric, preferably a paper making clothing, which includes at least one monofilament yarn with a bi-nodal cross section. Further, a method of making an industrial fabric having a monofilament yarn with a bi-nodal cross section includes extruding a single filament yarn through a die to produce a monofilament yarn having a bi-nodal cross section. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: October 4, 2005
    Publication date: April 13, 2006
    Applicant: Voith Paper Patent GmbH
    Inventors: Stewart Hay, Sanjay Patel
  • Publication number: 20050280184
    Abstract: A fabric made by selective deposition modeling or fused deposition modeling, where the material is fed from at least one nozzle onto a moveable belt. The nozzle is moveable translationally and the spacing between the nozzle and the belt is adjustable. Flow through the nozzle and translational movement of the nozzle is controlled such that the nozzle dispenses the material in a controlled manner to form the fabric layer by layer.
    Type: Application
    Filed: November 21, 2003
    Publication date: December 22, 2005
    Inventors: Ian Sayers, Stewart Hay
  • Publication number: 20050103397
    Abstract: A forming fabric having a set of paper side warp yarns, which interlace with both a set of paper side weft yarns and a set of binder wefts and a set of machine side warp yarns which interlace with a set of machine side weft yarns and the set of binder weft yarns, whereby the binder weft yarns are disposed in groups of at least two, and whereby both binder weft yarns of at least one binder group, in total, form fewer knuckles over the paper side warp yarns than the paper side weft yarns.
    Type: Application
    Filed: November 17, 2003
    Publication date: May 19, 2005
    Inventors: Scott Quigley, Jim Kramer, James Brewster, Stewart Hay
  • Patent number: 6000440
    Abstract: A multi-layer fabric with paperside to lower surface weft ratios of greater than 1 in which all paperside weft yarns interlace with the warp yarns in an identical manner. The paperside weft yarns intermittently buttress against adjacent paperside weft yarns and possess an average lateral crimp ratio of greater than 1.62 giving a fabric having an air permeability of less than 275 c.f.m. at 1/2 inch water pressure.
    Type: Grant
    Filed: April 3, 1998
    Date of Patent: December 14, 1999
    Assignee: Scapa Group PLC
    Inventor: Stewart Hay
  • Patent number: 4675992
    Abstract: A method and an apparatus for forming a tube from a flat tape, more particularly for forming a shielding tape around a cable core, is disclosed. The tape is moved longitudinally along a straight path and simultaneously deflected laterally from a flat to a circular configuration around a mandrel, and the center of the tape is stressed over an eccentric ring attached to the outside surface of the mandrel in substantially inverse proportion to the stretch imparted to the tape during forming of the tube.
    Type: Grant
    Filed: April 28, 1986
    Date of Patent: June 30, 1987
    Assignee: Canada Wire and Cable Limited
    Inventors: Edward R. Byzio, Peter Stewart-Hay
  • Patent number: 4606119
    Abstract: A method and an apparatus for forming a tube from a flat tape, more particularly for forming a shielding tape around a cable core, is disclosed. The tape is moved longitudinally along a straight path and simultaneously deflected laterally from a flat to a circular configuration around a mandrel, and the center of the tape is stressed over an eccentric ring attached to the outside surface of the mandrel in substantially inverse proportion to the stretch imparted to the tape during forming of the tube.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: August 19, 1986
    Assignee: Canada Wire and Cable Limited
    Inventors: Edward R. Byzio, Peter Stewart-Hay
  • Patent number: D248621
    Type: Grant
    Filed: February 12, 1976
    Date of Patent: July 25, 1978
    Assignee: Postmaster General of Canada
    Inventors: David Stewart Hay, Alfred Weston Bennett