Patent ID: 7644746
Filing Date: 2010-01-12
Classification: B06B,B29C,Y10T

Abstract:
1. A rotary ultrasonic sealer comprising a hollow shaft ( 1 ) having a longitudinal axis ( 2 ) and being rotatably arranged in a housing ( 3 ) for driven rotation about its longitudinal axis ( 2 ), said sealer further comprising a horn ( 8 ) arranged coaxially in the hollow shaft ( 1 ) and connected to a converter ( 6 ) and preferably also a booster ( 7 ), arranged coaxially in the hollow shaft, the horn ( 8 ) being provided with a peripheral sealing area ( 13 ) outside an axial end ( 12 ) of the hollow shaft ( 1 ) and the housing ( 3 ), and wherein the horn ( 8 ) is connected to the hollow shaft ( 1 ) by means of at least one annular, metallic support ( 11 ) extending between an outer face ( 14 ) of the horn ( 8 ) and an inner face ( 10 ) of the hollow shaft ( 1 ) and abutting the inner face ( 10 ) of the hollow shaft ( 1 ) with a radially outer face ( 26 ), said support ( 11 ) being arranged in a point with minimum vibration amplitude in the longitudinal direction of the horn, characterised in that the at least one annular support ( 11 ) is corrugated in cross section such that at least two grooves ( 17 , 18 ) and one ridge ( 19 ) arranged between the two grooves are provided between the inner face ( 10 ) of the hollow shaft ( 1 ) and the outer face ( 14 ) of the horn ( 8 ), the annular support ( 11 ) comprising a first leg ( 20 ) and a second leg ( 21 ) being interconnected at first ends thereof via a top part ( 22 ) and being provided with a first bottom part ( 23 ) and a second bottom part ( 24 ), respectively, at second ends opposite the first ends.