Method and apparatus for sealing a packaging container overpressure valve
AssigneeRobert Bosch GmbH
InventorsKlaus Domke, Fritz Gaukler
Life of this patent
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Abstract
For sealing off overpressure valves of packaging containers, a small quantity of liquid sealant is introduced into a valve. To check whether such valve has been equipped with sealant, the sealant is heated, prior to introduction into the valve, to a temperature that is elevated compared with ambient temperature. After that the valve is checked for a temperature difference with a heat sensor, which causes valves not equipped with sealant to be rejected. The sealant is heated immediately prior to its application to a valve, in a nozzle delivering it.
Claims17
A method for sealing off a packaging container overpressure valve and testing same in which a liquid sealant is disposed between sealing faces of valve elements comprising the steps of introducing the liquid sealant into the valve (1) at a elevated temperature compared with the ambient temperature, and monitoring the valve for an elevated temperature compared with the ambient temperature.
An apparatus for sealing off a packaging container overpressure valve including an aperture in at least one valve disposed on a carrier strip, comprising a nozzle means including a dispensing end for dispensing one drop of liquid sealant into said aperture, a heating element is thermally conductively connected to said nozzle means, said liquid sealant being heated by said heating element to a temperature above ambient before dispensing said one drop of sealant into said aperture, and a monitoring means for detecting the presence of a heated liquid sealant on a valve subsequent to being dispensed by said nozzle means.
An apparatus for applying a sealant to an overpressure valve and then determining the presence of the sealant which comprises a dispensing means including a sealant, a heating means for heating the sealant, a carrier strip on which at least one package overpressure valve to be sealed off is disposed, means for moving the carrier strip and the valve to the dispensing means including the sealant, and a heat sensor monitoring apparatus for determining the presence of a sealant in the package overpressure valve.
An apparatus for applying a sealant to a packaging container overpressure valve and then determining the presence of the sealant in said valve which comprises a dispensing means for dispensing a sealant, a heating means for heating the sealant to be dispensed, a heat sensor monitoring apparatus for determining the presence of a sealant in the package overpressure valve and a conveying means for presenting said overpressure valve to said dispensing means and said monitoring means.
Dependencies are inferred from the claim text.