Ab Tetrapak

Vilnis Bruveris

Lars C Carlsson

Lars Carlsson

Packing machines which manufacture packing containers of the so-called gable-top type from flexible packing laminate frequently handle prefabricated, tubular packing container blanks which are provided with a bottom section by folding in and sealing of a number of bottom wall panels. The bottom is pressed down and sealed while the blank is supported by a mandrel on a mandrel wheel. In order to avoid the transmission of the pressing and sealing forces to, and stressing of, the axle and bearing of the mandrel wheel, an arrangement is proposed which is designed so that the compressive forces generated by the pressure devices are absorbed by a tie rod which connects the pressure application arrangement with the axle of the mandrel wheel, so that the forces are absorbed internally without stressing the mandrel wheel axle or other surrounding elements.

Pressure application arrangement on a packing machine

An arrangement for the retaining of container blanks (1) in a predetermined correct position on mandrels on a packing machine of the type which manufactures filled and closed packing containers from tubular container blanks and which comprises a stepwise rotatable mandrel wheel which is the bearer of mandrels distributed around the mandrel wheel which are intended to move container blanks applied to the mandrels in correct position between successive processing stations so as to achieve a bottom closure of the blanks. The arrangement comprises clamping elements pressed against the mandrels in the form, for example, of a lever which is adapted to be pivotable in a bracket at one lateral surface of the mandrel. The mandrel includes an upper clamping arm pressed against the mandrel and a lower maneuvering arm rigidly connected with the clamping arm as well as a spring element arranged at the top of the clamping arm (14). The clamping element (14) and the spring element can be disengaged from the mandrel through the effect of stops located at one or more of the stations which are adapted to act upon the maneuvering arm so that the latter through a forced pivoting movement adjusts the clamping arm (16) and the spring element (16) into a position wholly or partly disengaged from the mandrel.

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Malmo, Sweden

Vilnis Bruveris