Tetra Pak International Ab

Tetra Laval Holdings & Finance S.a.

Par M Andersson

Kenneth C Pokusa

Sevugan Palaniappan

Rolf Viberg

Bengt A Rosberg

An induction sealing device is utilized to seal a closure to a container on a packaging machine. The induction sealing device has a recess area for receiving a spout of a closure during the application process. A current is induced in a metal medium that generates heat to melt and chemically bond a closure to a container. The metal medium may be found in either the closure or the container.

Induction heat sealing of a closure to a container

An arrangements for ultrasonic sealing comprises a sealing jaw which is combined with an ultrasonics source and a counterjaw. During the sealing the parts which are to be sealed to each other are pressed together between working surfaces of the jaws with simultaneous activation of the ultrasonics source as a result of which the parts are welded together. In the sealing of thin material layers it is very difficult to obtain a uniform compression over the whole surface which means that the risk of burning asunder or unsatisfactory sealing increases. In the invention this is prevented with the help of supporting elements which engage with two stop faces located in the nodal plane of the sealing jaw and on the one hand determine the minimum distance between the working surface, and on the other hand orientate the flexibly suspended jaw so that the working surfaces are parallel.

Arrangement for ultrasonic sealing

Small packing containers such as individual packages for yogurt, ice-cream or the like, are frequently in the form of beakers provided with a lid consisting of a tear-off foil. To reduce the risk of leakage and provide a packing container of greater mechanical strength a beaker type packing container has been provided with an integrated, openable top side otherwise made of the same material as the beaker. The top remains connected to the packing container after it is opened.

Packing container

When a machine element having a large mass is given a reciprocating movement, the recurring changes in speed as well as direction of movement require that very great driving forces must be applied, which cause varying stresses on the driving unit. In case the movement path of the machine element is more or less vertical the force of gravity causes extra stresses on the machine element. These difficulties are overcome in accordance with the invention by providing a spring system which on the one hand equalizes the effect of the force of gravity on the machine element and, on the other hand compensates the arising mass forces by absorbing, storing and emitting energy following the movement of the machine element. Hereby the amount of applied driving force is reduced, so that shocks and vibrations occurring during the driving are effectively reduced.

Arrangement for the compensation of inertia forces in the reciprocating

When machine elements having a large mass are indexed, i.e. subjected to short, quick rotating movements, very great acceleration and deceleration forces must be transmitted via the driving means of the machine. Due to vibrations occurring, increasing the stresses on the driving means, the driving means must be dimensioned accordingly. The present invention provides a method and an arrangement for the compensation of the forces applied and thus for reducing the stresses which occur. This is performed by combining the indexing machine element with a cam disc which is contacted by a number of spring-loaded cam followers, whereby the cam disc has such a shape that the cam follower decelerates and accelerates the cam disc following the desired movement pattern of the machine element.

Method and an arrangement for the compensation of inertia forces in the

A filler pipe for filling containers of a packing machine includes a nozzle part having an elongated base plate. One side of the base plate has a plurality of guide vanes which together with the base plate and a material forming a portion of the containers will provide filling channels for a fluid. The guide vanes may be straight or curved and may be arranged so as to lie at a periphery of the base plate. The base plate may preferably have a triangular shape with a generally decreasing width. In another embodiment of the present invention, a distribution chamber is provided beneath the base plate with a plurality of holes in the base plate permitting communication between the distribution chamber and the filling channels. In this embodiment, the base plate is preferably rectangular in shape with the guide vanes extending completely across the base plate.

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Bjarred, Sweden

Par M Andersson