Patents by Inventor Gord W. Johnston

Gord W. Johnston 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).

  • Melt blowing apparatus with parallel flow filament attenuating slot
    Publication number: 20030173701
    Abstract: A melt blowing die for extruding filaments of a polymer by a suitable configured air supply system to provide critical influencing and control over the molecular orientation, crystallinity and crystal orientation in high speed fiber spin line applications. Control of the both the magnitude and location of the applied shearing force is provided, through the design characteristics of the air supply system and, in particular, the attenuation of the filament through an attenuation slot; in one form in conjunction with the introduction of the air flow to the filament in a parallel flow caused by a Coanda bend in a second form in conjunction with a properly designed internal channel.
    Type: Application
    Filed: March 21, 2003
    Publication date: September 18, 2003
    Inventors: Warren Arseneau, Gord W. Johnston
  • Method of melt blowing polymer filaments through alternating slots
    Patent number: 6562282
    Abstract: A melt blowing die for extruding filaments of a polymer by a suitable configured air supply system to provide critical influencing and control over the molecular orientation, crystallinity and crystal orientation in high speed fiber spin line applications. Control of the both the magnitude and location of the applied shearing force is provided, through the design characteristics of the air supply system and, in particular, the attenuation of the filament through an attenuation slot; in one form in conjunction with the introduction of the air flow to the filament in a parallel flow caused by a Coanda bend in a second form in conjunction with a properly designed internal channel.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: May 13, 2003
    Assignee: Rtica, Inc.
    Inventors: Warren Arseneau, Gord W. Johnston