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:
Nov. 19, 1996
Filed:
Sep. 28, 1994
Stefan Annehed, Palatine, IL (US);
Hisami Mitsuishi, Wheeling, IL (US);
Erik Schott, Buffalo Grove, IL (US);
Dean C Skonieczny, Palatine, IL (US);
Par J Svensson, Palatine, IL (US);
Tetra Laval Holdings & Finance S.A., Pully, CH;
Abstract
An ultrasonic transducer assembly for hygienic ultrasonic sealing is disclosed. The assembly includes a hygienic ultrasonic sealing area and a non-hygienic area, separated by a barrier wall. The barrier wall has an opening which allows an ultrasonic converter to move back and forth ('reciprocate') through the opening. The ultrasonic converter is also vibrated at an ultrasonic frequency by machinery located in the non-hygienic area of the machine, and transmits those vibrations to the hygienic area of the machine. The converter has a null area at which the converter is vibrated substantially minimally and other areas which are much more vigorously vibrated. A generally cylindrical sealing surface is fixed with respect to the null area of the transducer. The sealing surface is wiped by a wiping seal mounted to the edge of the opening. These two parts may also be reversed. Other details of the anvils, ultrasonic transducers, their drives and assemblies, and other aspects of an ultrasonic gable carton sealing machine are also disclosed.