Patents by Inventor Henry G. Schirmer

Henry G. Schirmer 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).

  • Publication number: 20200298459
    Abstract: A blown film line and process for making blown film, including an annular extrusion or coextrusion die, a plurality of nip rollers at a location remote from the annular die, a blown film bubble extruding from the annular die and traveling toward the nip rollers along a traveling path, an air cooling apparatus in the vicinity of the annular die, and a water cooling apparatus located downstream from the air cooling apparatus along the traveling path. The water cooling apparatus includes a wet porous material in direct contact with the blown film bubble and surrounding an outer circumference of the blown film bubble. The wet porous material continuously wipes the blown film bubble with water as the blown film bubble moves along the traveling path.
    Type: Application
    Filed: September 6, 2019
    Publication date: September 24, 2020
    Inventor: Henry G. Schirmer
  • Patent number: 10611129
    Abstract: A method of making thin, annular multilayer coextruded films uses a layer sequence repeater module that includes a cell formed of a plurality of thin annular disks stacked on top of each other in an axial direction of the co-extrusion die. Each disk includes a plurality of openings aligned with openings in the adjacent disks, thus forming multiple inner and outer melt passages. At least one cell of the layer sequence repeater module includes at least one first cap disk, at least one second cap disk, at least one distribution disk, at least one repeater disk and at least one spreader disk. The layer sequence repeater module may be a separately assembled and individually removable module of the co-extrusion die. Alternatively or additionally, the layer sequence repeater module may be incorporated into a module of the co-extrusion die.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: April 7, 2020
    Assignee: Renolit Nederland BV
    Inventor: Henry G. Schirmer
  • Publication number: 20180029338
    Abstract: A layer sequence repeater module for a co-extrusion die includes a cell formed of a plurality of thin annular disks stacked on top of each other in an axial direction of the co-extrusion die. Each disk includes a plurality of openings aligned with openings in the adjacent disks, thus forming multiple inner and outer melt passages. At least one of the layer sequence repeater module includes at least one first cap disk, at least one second cap disk, at least one distribution disk, at least one repeater disk and at least one spreader disk. The layer sequence repeater module may be a separately assembled and individually removable module of the co-extrusion die. Alternatively or additionally, the layer sequence repeater module may be incorporated into a module of the co-extrusion die.
    Type: Application
    Filed: August 23, 2017
    Publication date: February 1, 2018
    Inventor: Henry G. Schirmer
  • Patent number: 9381723
    Abstract: Cellular thin films include a first side separated from a second side, the separation of which defines the thickness of the thin film; at least one layer of a polymeric material arranged along the thickness of the thin film, wherein the polymeric material includes cells and the first and second sides of the thin film have exterior surfaces that have substantially the same thickness as the interior walls forming the cells. The surfaces of the thin films have bumps caused by the cells. The thin exterior surfaces of the thin films is advantageous to allow the films to be flexible.
    Type: Grant
    Filed: September 12, 2008
    Date of Patent: July 5, 2016
    Assignee: University of Washington
    Inventors: Vipin Kumar, John Chunpo Lu, Henry G. Schirmer, Dustin Miller
  • Publication number: 20150093534
    Abstract: A layer sequence repeater module for a co-extrusion die includes a cell formed of a plurality of thin annular disks stacked on top of each other in an axial direction of the co-extrusion die. Each disk includes a plurality of openings aligned with openings in the adjacent disks, thus forming multiple inner and outer melt passages. At least one of the layer sequence repeater module includes at least one first cap disk, at least one second cap disk, at least one distribution disk, at least one repeater disk and at least one spreader disk. The layer sequence repeater module may be a separately assembled and individually removable module of the co-extrusion die. Alternatively or additionally, the layer sequence repeater module may be incorporated into a module of the co-extrusion die.
    Type: Application
    Filed: October 27, 2014
    Publication date: April 2, 2015
    Inventor: Henry G. SCHIRMER
  • Patent number: 8870561
    Abstract: A layer sequence repeater module for a co-extrusion die includes a cell formed of a plurality of thin annular disks stacked on top of each other in an axial direction of the co-extrusion die. Each disk includes a plurality of openings aligned with openings in the adjacent disks, thus forming multiple inner and outer melt passages. At least one of the layer sequence repeater module includes at least one first cap disk, at least one second cap disk, at least one distribution disk, at least one repeater disk and at least one spreader disk. The layer sequence repeater module may be a separately assembled and individually removable module of the co-extrusion die. Alternatively or additionally, the layer sequence repeater module may be incorporated into a module of the co-extrusion die.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: October 28, 2014
    Assignee: BBS Corporation
    Inventor: Henry G. Schirmer
  • Publication number: 20130243894
    Abstract: A layer sequence repeater module for a co-extrusion die includes a cell formed of a plurality of thin annular disks stacked on top of each other in an axial direction of the co-extrusion die. Each disk includes a plurality of openings aligned with openings in the adjacent disks, thus forming multiple inner and outer melt passages. At least one of the layer sequence repeater module includes at least one first cap disk, at least one second cap disk, at least one distribution disk, at least one repeater disk and at least one spreader disk. The layer sequence repeater module may be a separately assembled and individually removable module of the co-extrusion die. Alternatively or additionally, the layer sequence repeater module may be incorporated into a module of the co-extrusion die.
    Type: Application
    Filed: January 29, 2013
    Publication date: September 19, 2013
    Applicant: BBS Corporation
    Inventor: HENRY G. SCHIRMER
  • Publication number: 20100297416
    Abstract: Cellular thin films include a first side separated from a second side, the separation of which defines the thickness of the thin film; at least one layer of a polymeric material arranged along the thickness of the thin film, wherein the polymeric material includes cells and the first and second sides of the thin film have exterior surfaces that have substantially the same thickness as the interior walls forming the cells. The surfaces of the thin films have bumps caused by the cells. The thin exterior surfaces of the thin films is advantageous to allow the films to be flexible.
    Type: Application
    Filed: September 12, 2008
    Publication date: November 25, 2010
    Applicant: UNIVERSITY OF WASHINGTON
    Inventors: Vipin Kumar, John Chunpo Lu, Henry G. Schirmer, Dustin Miller
  • Patent number: 6413595
    Abstract: A coextrusion die includes a plurality of annular cells stacked on top of each other. Each annular cell includes a plurality of openings aligned with openings in the adjacent cell, thus forming multiple streams. Plastic melt may be supplied to the die coplanarly. Stacks of annular disks may be joined to form the annular cells through which plastic melt can be axially directed.
    Type: Grant
    Filed: November 16, 1999
    Date of Patent: July 2, 2002
    Assignee: BBS Corporation
    Inventor: Henry G. Schirmer
  • Patent number: 6062717
    Abstract: An apparatus and process for chopping and mixing a polymeric material having an elongated hollow barrel element with a material inlet end and a material outlet end and housing a rotatable extruder screw. The rotatable extruder screw includes at least one flightless screw section and at least one stationary tube element made from a bearing material and forming a plurality of serrations at at least one end, the stationary tube element being disposed around the flightless screw section within the elongated hollow barrel element and fixed against rotation with respect to the elongated hollow barrel element. The flightless screw section forms at least one material melt recess in a region corresponding to the serrations of the stationary tube element. Extruded products requiring, and characterized by, low shear, uniform dispersive mixing are made in one process step in a single screw extruder employing this invention.
    Type: Grant
    Filed: November 18, 1997
    Date of Patent: May 16, 2000
    Assignee: BBS Corporation
    Inventors: Henry G. Schirmer, Mitsuzo Shida
  • Patent number: 6000926
    Abstract: A coextrusion die includes a plurality of annular cells stacked on top of each other. Each annular cell includes a plurality of openings aligned with openings in the adjacent cell, thus forming multiple streams. Plastic melt may be supplied to the die coplanarly. Stacks of annular disks may be joined to form the annular cells through which plastic melt can be axially directed.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: December 14, 1999
    Inventor: Henry G. Schirmer
  • Patent number: 5994420
    Abstract: The present invention provides a process for producing thermoplastic foam, including:(a) melting a thermoplastic polymer to produce a polymer melt;(b) introducing a carbon dioxide blowing agent into the polymer melt;(c) adding to the polymer melt one or more additives selected from the group consisting of(1) polysiloxane, and(2) mineral oil; and(d) extruding and foaming the melted polymer melt, blowing agent, and one or more additives to produce thermoplastic foam.The resultant thermoplastic foam can be thermoformed into various foamed articles, such as foam packaging trays. The quality of foams made from a carbon dioxide blowing agent, and particularly 100% carbon dioxide, has been found to be substantially improved by adding one or more of the foregoing additives, i.e., polysiloxane, mineral oil and, optionally, polyolefin to the polymer melt during the extrusion and foaming process.
    Type: Grant
    Filed: November 12, 1997
    Date of Patent: November 30, 1999
    Assignee: Cryovac, Inc.
    Inventors: Gerald G. Gusavage, Henry G. Schirmer, Thomas A. Hessen
  • Patent number: 5762971
    Abstract: A coextrusion die includes a plurality of thin annular disks stacked on top of each other. Each annular disk includes a plurality of openings aligned with openings in the adjacent disk, thus forming multiple streams. Plastic melt may be supplied to the die coplanarly. Stacks of annular disks may be used to form modules through which plastic melt can be axially directed.
    Type: Grant
    Filed: October 22, 1996
    Date of Patent: June 9, 1998
    Inventor: Henry G. Schirmer
  • Patent number: 5684055
    Abstract: The present invention provides a method for the semi-continuous production of microcellular foam articles. In a preferred embodiment, a roll of polymer sheet is provided with a gas channelling means interleaved between the layers of polymer. The roll is exposed to a non-reacting gas at elevated pressure for a period of time sufficient to achieve a desired concentration of gas within the polymer. The saturated polymer sheet is then separated from the gas channelling means and bubble nucleation and growth is initiated by heating the polymer sheet. After foaming, bubble nucleation and growth is quenched by cooling the foamed polymer sheet.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: November 4, 1997
    Assignee: University of Washington
    Inventors: Vipin Kumar, Henry G. Schirmer
  • Patent number: 5674608
    Abstract: Polymeric, thin oriented films can be made by use of a combination of a hot blown process and a blown bubble process, i.e. a double bubble process. The resulting film has use in replacing PVC for in store stretch wrap applications. Very low density polyethylene, VLDPE, is an especially preferred material for this process. It may be used as a monolayer, or as one layer of a multilayer structure. In practicing the invention, the polymer is extruded and hot blown, and heated to a temperature above its orientation temperature. This heating can be accomplished by the use of a heated liquid reservoir or sock disposed at the lower end of the primary bubble, inside the bubble. The hot blown heated film is then passed through a first set of pinch rolls, re-inflated into a blown bubble, and collapsed at a second set of pinch rolls. Thin, tough and elastic packaging materials are obtained by this process.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: October 7, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Patent number: 5674607
    Abstract: Polymeric, thin oriented films can be made by use of a combination of a hot blown process and a blown bubble process, i.e. a double bubble process. The resulting film has use in replacing PVC for in store stretch wrap applications. Very low density polyethylene, VLDPE, is an especially preferred material for this process. It may be used as a monolayer, or as one layer of a multilayer structure. In practicing the invention, the polymer is extruded and hot blown, and heated to a temperature above its orientation temperature. This heating can be accomplished by the use of a heated liquid reservoir or sock disposed at the lower end of the primary bubble, inside the bubble. The hot blown heated film is then passed through a first set of pinch rolls, re-inflated into a blown bubble, and collapsed at a second set of pinch rolls. Thin, tough and elastic packaging materials are obtained by this process.
    Type: Grant
    Filed: March 23, 1995
    Date of Patent: October 7, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Patent number: 5670552
    Abstract: The present invention provides a process for producing thermoplastic foam, including:(a) melting a thermoplastic polymer to produce a polymer melt;(b) introducing a carbon dioxide blowing agent into the polymer melt;(c) adding to the polymer melt one or more additives selected from the group consisting of(1) polysiloxane, and(2) mineral oil; and(d) extruding and foaming the melted polymer melt, blowing agent, and one or more additives to produce thermoplastic foam.The resultant thermoplastic foam can be thermoformed into various foamed articles, such as foam packaging trays. The quality of foams made from a carbon dioxide blowing agent, and particularly 100% carbon dioxide, has been found to be substantially improved by adding one or more of the foregoing additives, i.e., polysiloxane, mineral oil and, optionally, polyolefin to the polymer melt during the extrusion and foaming process.
    Type: Grant
    Filed: December 18, 1995
    Date of Patent: September 23, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventors: Gerald G. Gusavage, Henry G. Schirmer, Thomas A. Hessen
  • Patent number: 5663002
    Abstract: A multilayer film is disclosed in which at least one layer thereof comprises a blend of:a first styrene butadiene copolymer having a butadiene content of 50 weight percent or more; anda second styrene butadiene copolymer having a butadiene content of 50 weight percent or less, wherein, the total butadiene content of the blend ranges from about 30 weight percent to about 50 weight percent. When used as an outer layer of an overwrap material, such blend provides provides an improved overlap heat seal.
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: September 2, 1997
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Patent number: 5482769
    Abstract: A cross-linkable, preferably stretch oriented film comprising a blend of a polyolefin and a diene polymer and a transition metal catalyst, wherein the blend cross-links in the presence of oxygen without irradiation to provide a film with high heat resistance.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: January 9, 1996
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer
  • Patent number: 5456979
    Abstract: Polymeric, thin oriented films can be made by use of a combination of a hot blown process and a blown bubble process, i.e. a double bubble process. The resulting film has use in replacing PVC for in store stretch wrap applications. Very low density polyethylene, VLDPE, is an especially preferred material for this process. It may be used as a monolayer, or as one layer of a multilayer structure. In practicing the invention, the polymer is extruded and hot blown, and heated to a temperature above its orientation temperature. This heating can be accomplished by the use of a heated liquid reservoir or sock disposed at the lower end of the primary bubble, inside the bubble. The hot blown heated film is then passed through a first set of pinch rolls, re-inflated into a blown bubble, and collapsed at a second set of pinch rolls. Thin, tough and elastic packaging materials are obtained by this process.
    Type: Grant
    Filed: December 2, 1993
    Date of Patent: October 10, 1995
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Henry G. Schirmer