Patent ID: 7766067
Filing Date: 2010-08-03
Classification: B06B,B29C,Y10T

Abstract:
1. Horn assembly adapted to be rotatably arranged in a housing ( 3 ) of a rotary ultrasonic sealer, and comprising a hollow shaft ( 1 ) having a longitudinal axis ( 2 ) and a horn ( 8 ) arranged coaxially in the hollow shaft ( 1 ) and connected to a converter ( 6 ) and preferably also a booster ( 7 ), the horn ( 8 ) being provided with a peripheral sealing area ( 13 ) outside an axially free 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 radially outward from an outer face ( 14 ) of the horn ( 8 ) and retaining means so as to fixedly retain the horn ( 8 ) in the hollow shaft ( 1 ), said support ( 11 ) being arranged essentially in a point with minimum vibration amplitude in the longitudinal direction of the horn, wherein 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 there between 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 a first bottom part ( 23 ) and a second bottom part ( 24 ), respectively, at second ends opposite the first ends, characterised in that the support ( 11 ) at its periphery comprises a conical surface ( 26 ) having a proximal end ( 61 ) and a distal end ( 63 ), which conical surface ( 26 ) is adapted to cooperate with a corresponding conical surface ( 27 ) for centering the support ( 11 ) with respect to the hollow shaft ( 1 ), when the horn ( 8 ) is retained in the hollow shaft ( 1 ) by means of the retaining means ( 30 ).