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  • MULTI-LAYERED FILTER MEDIA
    Publication number: 20180353884
    Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
    Type: Application
    Filed: August 22, 2018
    Publication date: December 13, 2018
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Sven Siegle
  • 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
    Patent number: 6554881
    Abstract: A filter media having a synthetic microfiber polymer fine fiber web wherein the diameter of the fibers is between about 0.8 to about 1.5 microns. The filter media is acceptable for use in ASHRAE applications. Constructions with a low DP backing, support or prefilter layers of coarse fiber provide large area filter webs of high efficiency and a stale and high threshold value of alpha above eleven.
    Type: Grant
    Filed: October 27, 2000
    Date of Patent: April 29, 2003
    Assignee: Hollingsworth & Vose Company
    Inventor: David Thomas Healey
  • Multi-layered filter media
    Patent number: 10080985
    Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: September 25, 2018
    Assignee: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Sven Siegle
  • Multi-layered filter media
    Patent number: 9149748
    Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
    Type: Grant
    Filed: February 25, 2013
    Date of Patent: October 6, 2015
    Assignee: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Sven Siegle
  • Fibrillated fibers for liquid filtration media
    Patent number: 9511330
    Abstract: Fiber webs which are used in filter media are described herein. In some embodiments, the fiber webs include fibrillated fibers and optionally non-fibrillated fibers, amongst other optional components (e.g., binder resin). In some embodiments, the fiber webs include limited amounts of, or no, glass fiber. The respective characteristics and amounts of the fibrillated fibers are selected to impart desirable properties including mechanical properties and filtration properties (e.g., dust holding capacity and efficiency), amongst other benefits.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: December 6, 2016
    Assignee: Hollingsworth & Vose Company
    Inventors: Howard Yu, Sneha Swaminathan
  • PRE-COALESCING MULTI-LAYERED FILTER MEDIA
    Publication number: 20220001316
    Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
    Type: Application
    Filed: July 14, 2021
    Publication date: January 6, 2022
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Siqiang Zhu
  • Glass compositions with leachable metal oxides and ions
    Patent number: 10535853
    Abstract: The disclosure describes compositions and methods for producing a change in the voltage at which hydrogen gas is produced in a lead acid battery. The compositions and methods relate to producing a concentration of one or more metal ions in the lead acid battery electrolyte. The compositions include glass based compositions that are included as part of various battery components, such as the battery separator, pasting paper, additives to battery paste, etc.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: January 14, 2020
    Assignee: Hollingsworth & Vose Company
    Inventors: John Wertz, Christopher Campion, Yuri Vulfson, Rene Gargan, Nicolas Clement, Randall Keisler
  • 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
  • Multi-region battery separators
    Patent number: 9293748
    Abstract: Disclosed is a battery separator, comprising two fiber regions comprising glass fibers, and a middle fiber region disposed between them comprising larger average diameter fibers and specified amounts of silica, or fine fibers, or both; and processes for making the separator. Also disclosed is a battery separator, comprising a fiber region and either one or two silica-containing region(s) adjacent thereto, each of the regions containing a specified amount of silica; and processes for making the separator. Such separators are useful, e.g., in lead-acid batteries.
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: March 22, 2016
    Assignee: Hollingsworth & Vose Company
    Inventors: Akshay Ashirgade, Zhiping Jiang
  • FILTER MEDIA COMPRISING FLUORINATED AND NON-FLUORINATED WATER REPELLENT ADDITIVES
    Publication number: 20220161171
    Abstract: Filter media comprising fluorinated water-repellent additives and/or water-repellent additives having minimal or no fluorine atoms are generally provided. Filter media disclosed herein may include fluorinated water-repellent additives but not water-repellent additives having minimal or no fluorine atoms, water-repellent additives having minimal or no fluorine atoms but not fluorinated water-repellent additives, or both fluorinated water-repellent additives and water-repellent additives having minimal or no fluorine atoms.
    Type: Application
    Filed: November 23, 2021
    Publication date: May 26, 2022
    Applicant: Hollingsworth & Vose Company
    Inventors: Dimitry Papkov, Phillip P. Carpenter, Felix Ahrens
  • Multi-region battery separators
    Patent number: 9577236
    Abstract: Disclosed is a battery separator, comprising two fiber regions comprising glass fibers, and a middle fiber region disposed between them comprising larger average diameter fibers and specified amounts of silica, or fine fibers, or both; and processes for making the separator. Also disclosed is a battery separator, comprising a fiber region and either one or two silica-containing region(s) adjacent thereto, each of the regions containing a specified amount of silica; and processes for making the separator. Such separators are useful, e.g., in lead-acid batteries.
    Type: Grant
    Filed: February 9, 2016
    Date of Patent: February 21, 2017
    Assignee: Hollingsworth & Vose Company
    Inventors: Akshay Ashirgade, Zhiping Jiang
  • DURABLE FIBER WEBS
    Publication number: 20140170918
    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 including at least two components (e.g., a first component and a second component) that may react with one another to form a copolymer. In some embodiments, the coated fiber web may be sufficiently self-supporting, durable, and strong, such that filter media and/or elements formed of the web do not require additional support structures (e.g., a scrim).
    Type: Application
    Filed: January 10, 2013
    Publication date: June 19, 2014
    Applicant: Hollingsworth & Vose Company
    Inventors: Richard O. Angus, JR., Cameron Thomson, Sneha Swaminathan
  • Pre-coalescing multi-layered filter media
    Patent number: 9149749
    Abstract: Fiber webs that may be used as filter media are provided. In some embodiments, the filter media may include multiple layers. Each layer may be designed to have separate functions in the filter media. For example, a first layer may be provided for improving dust holding capacity, a second layer for improving efficiency, and a third layer for providing support and strength to the media. By designing the layers to have separate functions, each layer may be optimized to enhance its function without negatively impacting the performance of another layer of the media.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: October 6, 2015
    Assignee: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Siqiang Zhu
  • Magnetic disk cartridge comprising a nonwoven fabric liner with indentations formed therein
    Patent number: 5650898
    Abstract: A floppy disk liner is formed of one or more latex bonded non-woven fibers. The fibers forming the liner may be formed from a cellulosic material, a thermoplastic material, or a combination of cellulosic and thermoplastic materials. At least one side of the liner has a plurality of indentations that do not entirely penetrate the liner. The indentations may occupy a total of not less than about 15% of the surface area of the liner.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: July 22, 1997
    Assignee: Hollingsworth & Vose Company
    Inventors: John C. Atkinson, Thomas A. Dindinger
  • 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
  • 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: 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
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