PROCESS FOR VACUUM CONDITIONING LIQUIDS AND SOFT TUBE PASTES WITH VALVE OR DELIVERY PUMP AND DEVICE FOR IMPLEMENTING SAID METHOD

摘要

In order to benefit from all the advantages presented by dispensing valves comparable to precompression metering pumps 10 when they are arranged on flexible tubes 12 containing a more or less fluid paste 13, it is valuable to be able to create the vacuum of air in the tube at the time of the welding of its bottom 14. / P P For this a method of conditioning is proposed comprising the following steps: / P P 1degre (s) Introduction of the dough by the bottom of the tube already fitted with its valve; / P P 2degree (s) Partial welding of the bottom of the tube; / P P 3degree (s) Establishment of the air vacuum in the tube, immediately followed by the completion of the welding of this bottom. / P P The whole of step 3 is advantageously carried out by means of a device 50 comprising two groups of parts sliding relative to one another. other, can be mounted on a press 90 and connected to a vacuum pump 91. When its lower slot 51 caps the bottom 14 presouded d ' a tube 12 placed in a support 20 serving as a stop to the lower group 52, the depression of the upper group formed by the cylinders 70, 75 and 80 that causes the press, triggers indeed, through a cam 72 and 63, the opening of the valve 57 followed quickly by the tightening of the jaws 54.