The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2001
Filed:
Jul. 12, 1999
J. Michael Drozd, Durham, NC (US);
William T. Joines, Durham, NC (US);
Industrial Microwave Systems, Inc., Morrisville, NC (US);
Abstract
A source provides an electromagnetic wave that has a range of frequencies. The source sweeps the frequency of the electromagnetic wave between a cutoff frequency and double the cutoff frequency. The location, angle, or effective angle of an opening is adjusted by an opening adjuster. A path for an electromagnetic wave has a short for creating a standing wave. The path has a movable surface that can push and pull the peaks and valleys of the standing wave so as to achieve more uniform heating of the material. A dielectric wheel pushes and pulls the peaks and valleys of a standing wave so as to achieve more uniform heating of a material. A dielectric structure has a surface that has a short side and a long side. A motor rotates the dielectric structure to push and pull the peaks and valleys of a standing wave so as to achieve more uniform heating of a material. A path has a first choke flange that has a width w,, and a second choke flange that has a width w,. The widths w,, and w,are selected to minimize the escape of electromagnetic energy from the path. A path has a first choke flange that has a height h,and a second choke flange that has a height h,. The heights h,, and h,are selected to minimize the escape of electromagnetic energy from the path. A choke flange has gaps to prevent the flow of electromagnetic energy along the choke flange. A choke flange has a horizontal section and a vertical section. The horizontal section has a narrow dimension to limit the escape of electromagnetic energy from the interior region. The vertical section is located at an end of the horizontal section opposite the opening.