Search Patents
  • FIBER WEBS COATED WITH FIBER-CONTAINING RESINS
    Publication number: 20140166572
    Abstract: Fiber webs that may be coated and used in filter media are provided. In some embodiments, the fiber web is a non-woven web that is coated with a resin comprising fibers. For example, the resin may include fibers that have sizes (e.g., diameters) in the nano or micron range. In some cases, the fibers distributed within the resin are fibrillated fibers. The respective characteristics and amounts of the fibers in the resin may be selected to impart desirable properties including enhanced mechanical properties and filtration properties (e.g., relatively high strength and air permeability), amongst other benefits.
    Type: Application
    Filed: December 14, 2012
    Publication date: June 19, 2014
    Applicant: Hollingsworth & Vose Company
    Inventor: Mark Snyder
  • Filter media with improved conductivity
    Patent number: 8663358
    Abstract: Filter media are provided having improved conductivity to enhance filtration efficiency and/or dissipate static charge, and methods for making the same. In one exemplary embodiment, the filter media can include a filtration substrate, and at least one conductive coating disposed on at least a portion of the filtration substrate. In use, the conductive coating is coupled to an energy source and it is effective to emit ions when energy is delivered thereto to increase the efficiency of the filtration substrate and/or to dissipate or eliminate static charge generated during filtration.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 4, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: Wai M. Choi, Karin N. Soper
  • FILTER MEDIA COMPRISING NON-FLUORINATED WATER REPELLENT ADDITIVES
    Publication number: 20220161169
    Abstract: Filter media comprising water-repellent additives having minimal or no fluorine atoms are generally provided. In some embodiments, the water-repellent additives comprise one or more water-repellent functional groups. The water-repellent functional groups may comprise a carbon chain including three or more carbon atoms. In some embodiments, some or all of the water-repellent functional group(s) are bonded to a silicon atom and/or a metal atom. It is also possible for some or all of the water-repellent functional group(s) to form side chain(s) attached to a polymer backbone.
    Type: Application
    Filed: November 23, 2020
    Publication date: May 26, 2022
    Applicant: Hollingsworth & Vose Company
    Inventors: Dimitry Papkov, Phillip P. Carpenter, Felix Ahrens
  • Filter media with charge stabilizing and enhancing additives
    Publication number: 20060079145
    Abstract: Electret filter media having an increased electrostatic charge that is substantially maintained in the presence of heat are provided. In one exemplary embodiment, the filter media includes a melt processable charge enhancing additive, such as a fatty acid amide, and a melt processable charge stabilizing additive, such as a fatty acid metal salt. The charge enhancing additive is particularly effective to increase or enhance the electrostatic charge of the filter media when a charge is imparted thereto, and the charge stabilizing additive is particularly effective to stabilize the charge such that, when the filter media is subjected to a heat treatment, the enhanced electrostatic charge is substantially maintained.
    Type: Application
    Filed: October 13, 2004
    Publication date: April 13, 2006
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventor: Stephen Cox
  • Systems and methods for making fiber webs
    Patent number: 9062415
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve designs which allow improved control of the fiber web forming process. For example, in certain embodiments involving the flowing of more than one fiber mixtures, the amount of mixing of the fiber mixtures may be controlled to produce fiber webs having different structural and/or performance characteristics. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Grant
    Filed: May 7, 2014
    Date of Patent: June 23, 2015
    Assignee: Hollingsworth & Vose Company
    Inventors: Milind Godsay, Mark S. Millar
  • FILTER MEDIA INCLUDING A WAVED FILTRATION LAYER
    Publication number: 20170312673
    Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.
    Type: Application
    Filed: March 22, 2017
    Publication date: November 2, 2017
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
  • WAREWASH MACHINE WITH REMOVAL ROTATING ARM AND RELATED METHOD
    Publication number: 20130206179
    Abstract: A warewash machine arm mechanism includes a liquid supply shaft assembly including a rotatable sleeve bearing mounted thereon, and an arm assembly including an elongated interior liquid flow space along an arm body and one or more liquid ejection orifices. The arm assembly is releasably mounted to the supply shaft assembly via a latch mechanism of the arm assembly that engages the rotatable sleeve bearing such that the arm assembly rotates with the rotatable sleeve bearing during ejection of liquid from the liquid ejection orifices.
    Type: Application
    Filed: January 10, 2013
    Publication date: August 15, 2013
    Applicant: Hollingsworth & Vose Company
    Inventors: Michael T. Watson, Brian A. Brunswick, Jeffrey R. Newcomer, Gonska Heinrich, Roland Walz
  • FILTER MEDIA INCLUDING A WAVED FILTRATION LAYER
    Publication number: 20200391148
    Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.
    Type: Application
    Filed: February 17, 2020
    Publication date: December 17, 2020
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
  • Filter media with improved conductivity
    Patent number: 7964012
    Abstract: Filter media are provided having improved conductivity to enhance filtration efficiency and/or dissipate static charge, and methods for making the same. In one exemplary embodiment, the filter media can include a filtration substrate, and at least one conductive coating disposed on at least a portion of the filtration substrate. In use, the conductive coating is coupled to an energy source and it is effective to emit ions when energy is delivered thereto to increase the efficiency of the filtration substrate and/or to dissipate or eliminate static charge generated during filtration.
    Type: Grant
    Filed: August 2, 2006
    Date of Patent: June 21, 2011
    Assignee: Hollingsworth & Vose Company
    Inventors: Wai M. Choi, Karin N. Soper
  • SYSTEMS AND METHODS FOR MAKING FIBER WEBS
    Publication number: 20130025806
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve a first system for forming a fiber web (e.g., a wet laid system or non-wet laid system) and additionally one or more coating units. The first system for forming a fiber web may be used to form one or more fibrous layers of the fiber web, and the coating unit may be used to form an additional fibrous layer of the fiber web. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 31, 2013
    Applicant: Hollingsworth & Vose Company
    Inventor: David Vallery
  • Systems and methods for making fiber webs
    Patent number: 8956504
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve a first system for forming a fiber web (e.g., a wet laid system or non-wet laid system) and additionally one or more coating units. The first system for forming a fiber web may be used to form one or more fibrous layers of the fiber web, and the coating unit may be used to form an additional fibrous layer of the fiber web. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: February 17, 2015
    Assignee: Hollingsworth & Vose Company
    Inventor: David Vallery
  • Batteries Containing Bismuth Glass Compositions
    Publication number: 20120028126
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Application
    Filed: August 2, 2011
    Publication date: February 2, 2012
    Applicant: HOLLINGSWORTH & VOSE COMPANY
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
  • Gel-forming battery separator
    Patent number: 7097939
    Abstract: Gel-forming battery separators and methods for constructing them. Particles are embedded into pores of a porous support to form a composite. The chemical make-up of surfaces of the particles includes a silanol group. The composite, when contacted with an effective amount of liquid electrolyte, is capable of forming a gelled matrix that includes electrolyte residing within the porous support. Batteries and methods of forming batteries featuring gel-forming separators are also disclosed. No pre-mixing of siliceous material with electrolyte is required facilitating battery construction.
    Type: Grant
    Filed: July 13, 2001
    Date of Patent: August 29, 2006
    Assignee: Hollingsworth & Vose Company
    Inventors: Anthony L. Ferreira, Norman Lifshutz, Wai Ming Choi
  • FILTER MEDIA WITH IRREGULAR STRUCTURE
    Publication number: 20200139281
    Abstract: Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
    Type: Application
    Filed: November 5, 2018
    Publication date: May 7, 2020
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Maxim Silub, David T. Healey
  • FILTER MEDIA WITH IRREGULAR STRUCTURE
    Publication number: 20230025717
    Abstract: Articles and methods relating to filter media are generally provided. In some embodiments, a filter media has an irregular surface structure. For instance, the filter media may comprise a plurality of peaks that are irregular in one or more ways. A ratio of a peak height standard deviation to an average peak height may be greater than or equal to 0.05, and/or a ratio of a peak spacing standard deviation to an average peak spacing may be greater than or equal to 0.08. In some embodiments, a filter media comprises a non-woven fiber web having a layer thickness of greater than 0.3 mm and/or a stiffness of less than or equal to 100 mg.
    Type: Application
    Filed: July 26, 2022
    Publication date: January 26, 2023
    Applicant: Hollingsworth & Vose Company
    Inventors: Bruce Smith, Maxim Silin, David T. Healey
  • Systems and methods for making fiber webs
    Patent number: 8758559
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve a first system for forming a fiber web (e.g., a wet laid system or non-wet laid system) and additionally one or more coating units. The first system for forming a fiber web may be used to form one or more fibrous layers of the fiber web, and the coating unit may be used to form an additional fibrous layer of the fiber web. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: June 24, 2014
    Assignee: Hollingsworth & Vose Company
    Inventor: David Vallery
  • FILTER MEDIA INCLUDING ORIENTED FIBERS
    Publication number: 20150375150
    Abstract: Filter media incorporating one or more filtration layers that include fibers including fiber portions orientated at a non-zero angle with respect to a surface of the filtration layer are provided. In some embodiments, at least a part of the fiber portions are positioned at an angle of at least 20 degrees (e.g., between 46 degrees and 90 degrees, or between 61 degrees and 90 degrees) with respect to a surface of the filtration layer or an outer or cover layer of the media. This orientation of fiber portions may result in an increased efficiency (e.g., average efficiency and/or initial efficiency) compared to similar filter media that do not include such oriented fiber portions.
    Type: Application
    Filed: June 25, 2014
    Publication date: December 31, 2015
    Applicant: Hollingsworth & Vose Company
    Inventors: Arash Sahbaee, Bruce Smith
  • SYSTEMS AND METHODS FOR MAKING FIBER WEBS
    Publication number: 20140242274
    Abstract: Systems and methods for forming fiber webs, including those suitable for use as filter media and battery separators, are provided. In some embodiments, the systems and methods involve a first system for forming a fiber web (e.g., a wet laid system or non-wet laid system) and additionally one or more coating units. The first system for forming a fiber web may be used to form one or more fibrous layers of the fiber web, and the coating unit may be used to form an additional fibrous layer of the fiber web. In some embodiments, the systems and methods can be used to form fiber webs having a gradient in a property across a portion of, or the entire, thickness of the fiber web.
    Type: Application
    Filed: May 8, 2014
    Publication date: August 28, 2014
    Applicant: Hollingsworth & Vose Company
    Inventor: David Vallery
  • Filter media including a waved filtration layer
    Patent number: 10561972
    Abstract: Filter media including a waved filtration layer are described herein. The filtration layer may be held in a waved configuration by a support layer. In some cases, the filtration layer may have a combination of characteristics (e.g., mean flow pore size, basis weight, amongst others) that can lead to enhanced filtration performance (e.g., reduced air permeability decrease), in particular, in high humidity environments. The filter media may be used to form a variety of filter elements for use in various applications. In some embodiments, at least a surface of the filtration layer is hydrophilic.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: February 18, 2020
    Assignee: Hollingsworth & Vose Company
    Inventors: Bruce Smith, David T. Healey, Ingrid Rückert, Siqiang Zhu
  • Battery Separators with Bismuth Containing Glass Fibers
    Publication number: 20120021295
    Abstract: Disclosed are glass compositions, glass fiber compositions, glass fiber battery separators, glass fiber filter media, battery additives and active materials formed with glass compositions disclosed, glass fiber radiation shields, and glass fiber paper compositions. Certain embodiments include, among other components, bismuth oxide. Certain embodiments include about 0.5-30% bismuth oxide of the composition by weight and silica oxide at about 54-70% of the composition by weight. Embodiments may also include other components. For example, zinc oxide can make up about 0.01-3% of the composition by weight.
    Type: Application
    Filed: August 2, 2011
    Publication date: January 26, 2012
    Applicant: Hollingsworth & Vose Company
    Inventors: George Zguris, John Windisch, Patrick Svoboda, Yuri Vulfson
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