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US 4,792,068 AGranted
Nozzle with at least one opening that can be closed off
AssigneePKL Verpackungssysteme GmbH
InventorLars Trygg
Life of this patent
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AssigneePKL Verpackungssysteme GmbH
InventorLars Trygg
Estimating the term…
A nozzle with at least one opening that can be closed off, and especially a nozzle for packaging machines, including those that handle liquid products, with a valve body in the form of a piston that moves back and forth between a retracted position wherein it leaves the opening free and an advanced position wherein it completely closes off the opening. The object is to provide a nozzle with highly effective product-trimming action and continued piston operation even during the sterilization process. A guide for the piston has at least two positioning surfaces that operate in conjunction with two essentially opposite surfaces on the piston and precisely position it in the nozzle opening. The piston is axially divided or slit. Tensioning components force the halves of the piston apart and tight against the walls of the nozzle opening.
In a nozzle with at least one opening that can be closed off, and especially a nozzle for packaging machines, including those that handle liquid products, the nozzle including a valve body in the form of a piston that moves back and forth between a retracted position wherein it leaves the opening free and an advanced position wherein it completely closes off the opening, the improvement wherein the piston is axially divided or slit, the nozzle further including a guide (14) for the piston (9) that has at least two positioning surfaces that operate in conjunction with two essentially opposite surfaces on the piston and precisely position it in the nozzle opening (10), and a tensioning component (13) that forces the halves of the piston apart and tight against the walls of the nozzle opening.
A nozzle according to claim ,, including a seal (16) that prevents the product from leaking through the separation or slit in the piston and out of the nozzle opening (10) when the piston is in the advanced position.
Dependencies are inferred from the claim text.