Patents by Inventor Bradley M. Eisenbarth

Bradley M. Eisenbarth 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).

  • Extrusion head with high volume reservoir
    Patent number: 8936460
    Abstract: An extrusion head for an extrusion apparatus can include a spider for supporting a central mandrel. A high volume reservoir can be mounted to the spider on a downstream side of the spider. The central mandrel can extend longitudinally into the high volume reservoir. The high volume reservoir can have an axially straight annular conduit with a length L and an outer diameter OD. The annular conduit can have an L to OD ratio of about 1:1. A set of dies can be mounted downstream of the high volume reservoir, whereby the high volume reservoir reduces pressure and promotes homogenization of molten polymer flowing therethrough, before reaching the set of dies.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: January 20, 2015
    Assignee: American Maplan Corporation
    Inventors: John Michael Wallen, James W. Nixon, Bradley M. Eisenbarth
  • Multiple spider head
    Patent number: 8758003
    Abstract: The extrusion head including a conduit with a central mandrel extending within the conduit for supporting an inner die portion of a set of dies that has inner and outer die portions. An upstream spider and a downstream spider are included, and each have webs supporting the central mandrel at axially spaced apart positions. The webs of the upstream and downstream spiders can have web portions that are axially offset from each other to promote mixing of polymer flowing through the conduit.
    Type: Grant
    Filed: September 21, 2010
    Date of Patent: June 24, 2014
    Assignee: American Maplan Corporation
    Inventors: John Michael Wallen, James W. Nixon, Bradley M. Eisenbarth
  • Multiple Spider Head
    Publication number: 20110095449
    Abstract: The extrusion head including a conduit with a central mandrel extending within the conduit for supporting an inner die portion of a set of dies that has inner and outer die portions. An upstream spider and a downstream spider are included, and each have webs supporting the central mandrel at axially spaced apart positions. The webs of the upstream and downstream spiders can have web portions that are axially offset from each other to promote mixing of polymer flowing through the conduit.
    Type: Application
    Filed: September 21, 2010
    Publication date: April 28, 2011
    Applicant: American Maplan Corporation
    Inventors: John Michael Wallen, James W. Nixon, Bradley M. Eisenbarth
  • Extrusion Head With High Volume Reservoir
    Publication number: 20110095450
    Abstract: An extrusion head for an extrusion apparatus can include a spider for supporting a central mandrel. A high volume reservoir can be mounted to the spider on a downstream side of the spider. The central mandrel can extend longitudinally into the high volume reservoir. The high volume reservoir can have an axially straight annular conduit with a length L and an outer diameter OD. The annular conduit can have an L to OD ratio of about 1:1. A set of dies can be mounted downstream of the high volume reservoir, whereby the high volume reservoir reduces pressure and promotes homogenization of molten polymer flowing therethrough, before reaching the set of dies.
    Type: Application
    Filed: September 21, 2010
    Publication date: April 28, 2011
    Applicant: American Maplan Corporation
    Inventors: John Michael Wallen, James W. Nixon, Bradley M. Eisenbarth