Search Patents
  • Fibrillated fibers for liquid filtration media
    Patent number: 10322380
    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: October 18, 2016
    Date of Patent: June 18, 2019
    Assignee: Hollingsworth & Vose Company
    Inventors: Howard Yu, Sneha Swaminathan
  • MULTI-LAYERED FILTER MEDIA
    Publication number: 20140130469
    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: February 25, 2013
    Publication date: May 15, 2014
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Sven Siegle
  • Fibrillated fibers for liquid filtration media
    Patent number: 11247182
    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: April 30, 2019
    Date of Patent: February 15, 2022
    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
  • 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
  • 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
  • PRE-COALESCING MULTI-LAYERED FILTER MEDIA
    Publication number: 20140331626
    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: May 15, 2014
    Publication date: November 13, 2014
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Siqiang Zhu
  • 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
  • Filter medium and method of making same
    Patent number: 4119543
    Abstract: A filter medium particularly adapted for use in an oil filter for an internal combustion engine having a water-laid web of fibers, at least 70% of which are cellulose, impregnated with resin in a pattern at its wire side to a depth of 15 to 45% of its total thickness, the pattern having zones free from resin amounting to 35 to 60% of the total area of the wire side, each zone having at least one dimension no greater than 4 mm.
    Type: Grant
    Filed: July 8, 1977
    Date of Patent: October 10, 1978
    Assignee: Hollingsworth & Vose Company
    Inventors: Grover C. Lawson, James C. Wilson
  • 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: 20160059167
    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 31, 2015
    Publication date: March 3, 2016
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, 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
  • CALENDERED NON-WOVEN FIBER WEBS
    Publication number: 20220241710
    Abstract: Non-woven fiber webs and articles (e.g., filter media) comprising non-woven fiber webs are generally described. In some embodiments, a non-woven fiber web described herein formed via certain non-wetlaid processes may exhibit enhanced physical properties. For example, a non-woven fiber web may be subjected to a carding (e.g., cross-lapped carding) process. In some cases, the non-woven fiber webs described herein may be calendered to further enhance their physical properties.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 4, 2022
    Applicant: Hollingsworth & Vose Company
    Inventors: Narendiran Vitchuli, Abdoulaye Doucouré, Bruce Smith
  • 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
  • PRE-COALESCING MULTI-LAYERED FILTER MEDIA
    Publication number: 20190314747
    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: March 20, 2019
    Publication date: October 17, 2019
    Applicant: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Siqiang Zhu
  • Flutable fiber webs with high dust holding capacity
    Patent number: 8790492
    Abstract: The fiber webs described herein may be incorporated into filter media and filter elements. The fiber webs may exhibit a high dust holding capacity. The fiber webs may also exhibit a low thickness. The fiber webs may be sufficiently flexible and/or deformable so that they may be processed to include a series of waves (also known as flutes) that extend along the cross-machine direction.
    Type: Grant
    Filed: August 16, 2013
    Date of Patent: July 29, 2014
    Assignee: Hollingsworth & Vose Company
    Inventors: James M. Witsch, Douglas M. Guimond
  • Pre-coalescing multi-layered filter media
    Patent number: 11090590
    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: March 20, 2019
    Date of Patent: August 17, 2021
    Assignee: Hollingsworth & Vose Company
    Inventors: Máté Nagy, Siqiang Zhu
  • 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
  • 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
Narrow Results

Filter by US Classification