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:
Dec. 01, 1987
Filed:
Sep. 18, 1985
Shigeyoshi Osaki, Hyogo, JP;
Yoshihiko Fujii, Osaka, JP;
Kanzaki Paper Manufacturing Co., Ltd., Tokyo, JP;
Abstract
A method of measuring the orientation or dielectric characteristic of a dielectric sheet or web is disclosed, with the steps of inserting a sample portion of the dielectric sheet or web in a small clearance in a cavity resonator formed of a pair of waveguides respectively having a transmitting antenna and a receiving antenna, said waveguides being spaced apart from each other with their openings defining said clearance therebetween, irradiating said sample portion with frequency sweep type linearly polarized microwaves from the upper waveguide perpendicularly to said sample portion while producing a relative rotational motion between the plane of polarization of microwaves and said sample portion around the axis of said cavity resonator, and measuring the resonance frequency or Q value of the microwaves received by the lower waveguide.