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. 01, 1994
Filed:
Apr. 21, 1993
Applicant:
Inventors:
Peter Blomqvist, Lund, SE;
Ingmar Andreasson, Eslov, SE;
Magnus Rabe, Lund, SE;
Gyula Balla, Malmo, SE;
Tord Cedell, Lund, SE;
Assignee:
Tetra Laval Holdings & Finance SA, Pully, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
156 731 ; 1565802 ; 1563796 ; 1562722 ; 219633 ; 228-11 ;
Abstract
An apparatus for ultrasonic sealing of thermoplastic materials includes a vibration generator of a so-called giant magnetostrictive powder composite (GMPC) which is anchored to a jaw at an anchorage point. The vibration generator is formed with a cross-sectional area which progressively reduces as seen from the anchorage point. A free end of the vibration generator has a narrow working surface. The vibration generator is surrounded by a coil for generating a magnetic field.