Patents by Inventor Michael L. Bohn

Michael L. Bohn 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).

  • Apparatus for sealing and creating a thermal perforation
    Patent number: 6648044
    Abstract: A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.
    Type: Grant
    Filed: December 17, 2002
    Date of Patent: November 18, 2003
    Assignee: Pactiv Corporation
    Inventors: Michael L. Bohn, William P. Belias
  • Methods of making thermal seals and perforations
    Patent number: 6635139
    Abstract: A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: October 21, 2003
    Assignee: Pactiv Corporation
    Inventors: Michael L. Bohn, William P. Belias
  • Apparatus for sealing and creating a thermal perforation
    Publication number: 20030084991
    Abstract: A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.
    Type: Application
    Filed: December 17, 2002
    Publication date: May 8, 2003
    Inventors: Michael L. Bohn, William P. Belias
  • Methods of making thermal seals and perforations
    Publication number: 20020189751
    Abstract: A method for simultaneously sealing and creating a thermal perforation between two thermoplastic layers that comprises providing two thermoplastic layers. A drum is provided that has at least one sealbar and perforation assembly. The two thermoplastic layers are contacted to the sealbar and perforation assembly. The thermoplastic layers are sealed with two generally opposing parallel seals and simultaneously create a thermal perforation in the thermoplastic layers generally parallel to the opposing seals. The thermal perforation is located between the two opposing seals.
    Type: Application
    Filed: June 13, 2001
    Publication date: December 19, 2002
    Inventors: Michael L. Bohn, William P. Belias
  • Easy to open handle bag and method of making the same
    Patent number: 6159136
    Abstract: A method of forming a plurality of easy to open handle bags is provided. The method includes providing a flattened tube of thermoplastic material oriented in a generally longitudinal direction. The flattened tube has a first longitudinal side edge, a second longitudinal side edge, and a transverse heat seal. The tube has first, second, and third sections. The second section is disposed between the first and third sections. The first section is joined to the second section along a generally longitudinal first fold line. The second section is joined to the third section along a generally longitudinal second fold line. A generally rectangular hole is cut through the second section. The generally rectangular hole has a top edge and a bottom edge. The generally rectangular hole is contained transversely between the first and second fold lines.
    Type: Grant
    Filed: February 10, 2000
    Date of Patent: December 12, 2000
    Assignee: Pactiv Corporation
    Inventors: William P. Belias, Michael L. Bohn, Clifford H. Patridge
  • Easy to open handle bag and method of making the same
    Patent number: 6089753
    Abstract: A method of forming a plurality of easy to open handle bags is provided. The method includes providing a flattened tube of thermoplastic material oriented in a generally longitudinal direction. The flattened tube has a first longitudinal side edge, a second longitudinal side edge, and a transverse heat seal. The tube has first, second, and third sections. The second section is disposed between the first and third sections. The first section is joined to the second section along a generally longitudinal first fold line. The second section is joined to the third section along a generally longitudinal second fold line. A generally rectangular hole is cut through the second section. The generally rectangular hole has a top edge and a bottom edge. The generally rectangular hole is contained transversely between the first and second fold lines.
    Type: Grant
    Filed: June 4, 1999
    Date of Patent: July 18, 2000
    Assignee: Tenneco Packaging Inc.
    Inventors: William P. Belias, Michael L. Bohn