Bonded End Caps Patents (Class 210/493.2)
  • Method of making a seal
    Patent number: 6329625
    Abstract: An improved seal and method of making is disclosed for sealing a filter element to a filter mounting. The improved seal comprises a bonding pad formed from a sintered matrix of randomly oriented metallic fiber. The bonding pad is disposed between the filter element and the filter mounting. A mechanical fastener coacts between the filter element and the filter mounting for compressing the bonding pad to provide a seal between the filter element and the filter mounting. The bonding pad may be heated to create a frangible seal.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: December 11, 2001
    Assignee: USF Filtration & Separations Group, Inc.
    Inventors: Nathaniel R. Quick, Robert Malanga, Matthew M. Smolowitz
  • End-cap for pleated filter cartridge
    Publication number: 20010010297
    Abstract: A filter element comprising at least one elastomeric end-cap, a thin-walled pleated filter medium having edges thereon constructed and arranged for positioning proximate to the elastomeric end-caps, and a polymeric adhesive material within the end-caps for sealing the edges of the filter media therein, and a method for producing the same.
    Type: Application
    Filed: January 31, 2001
    Publication date: August 2, 2001
    Inventors: John L. Pulek, Daniel Marcinczyk
  • Integrity testable filtration unit using supported hydrophilic porous membranes
    Patent number: 6186341
    Abstract: The hydrophilicity of porous separation membranes is maintained by bonding the membranes to thermoplastic fiber substrates at least on their peripheries before the membrane peripheries are sealed in a thermoplastic resin. The membranes are capable of being integrity tested.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: February 13, 2001
    Assignee: Sartorius AG
    Inventors: Peter Konstantin, Oscar-Werner Reif, Jürgen Rupp, Peter Soelkner
  • Apparatus and method for sealing fluid filter by infrared heating
    Patent number: 6180909
    Abstract: An apparatus and method is disclosed for sealing a filter element to a support member. An array of bonding fibers is interposed between the filter element and the support member. Infrared energy is applied for a period of time sufficient to at least partially melt the array of bonding fibers to sinter bond the filter element to the support member.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: January 30, 2001
    Assignee: USF Filtration and Separations Group, Inc.
    Inventors: Nathaniel R. Quick, Tao Li, Robert Malanga, Vinod K. Sikka, Craig A. Blue
  • Fusion-welded thermoplastic filter assembly and a method of fabricating the same
    Patent number: 6179131
    Abstract: A fusion-welded thermoplastic assembly and a method of fabricating the same includes first and second thermoplastic members fusion-welded together using a third thermoplastic fusion element. The first and second thermoplastic members and the thermoplastic fusion element are heated to a molten state using an infrared heater, and the molten fusion element is fused to each of the first and second thermoplastic elements. Prior to being connected by the fusion element, the first and second thermoplastic members are either brought into contact with one another or is held in such a way that they can be connected to each other using the third thermoplastic fusion element.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: January 30, 2001
    Assignee: PTI Technologies, Inc.
    Inventors: Thomas A. Muzik, Kevin J. Knebel