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. 05, 1983
Filed:
Jul. 02, 1981
Antti Lehtinen, Jyvaskyla, FI;
Valmet Oy, , FI;
Abstract
Ultrasonic frequency sensor/radiators (hereinafter, radiators) are arranged in the vicinity of a material to be treated, on opposite sides of such material, opposite each other. In one embodiment, longitudinal acoustic vibrations are fed to the radiators at the same frequency and the phase difference of the vibrations fed to the different radiators is varied. In another embodiment, the vibrations are fed to the radiators at different frequencies f.sub.1 and f.sub.2 and the frequency difference .DELTA.f of the frequencies, where .DELTA.f=f.sub.1 -f.sub.2, is varied. In each embodiment the most intensive area of the field of vibration combinations in the material to be treated is focused by the radiators in a manner whereby it has an effect upon a desired area of the material.