SEALING DEVICE FOR VALVE OF VALVE BAG

摘要

Apparatus to seal the valve of a valve bag with adhesive and of the kind where bag arrives from bagging machine standing up or somewhat reclining. The apparatus comprises adhesive sprayer (9) over which and fitted thereto a shield (23) with bow-shaped cross-section and rounded front is mounted so that the fronts of shield (23) and sprayer (9) are flush over and under each other, or so that the shield (23) protrudes in front of sprayer (9). The assembly comprising shield (23) and sprayer (9) is suspended or has organs to move it in a way that the assembly during insertion into the valve (6) describes a bow-shaped motion (A) in the vertical middle of the bag valve and so that the assembly lifts up the valve (6) when inserted. The adhesive sprayer (9) is designed to apply adhesive onto the lower inside of the bag valve (6). According to one special embodiment the adhesive sprayer can turn or rotate round its own axis in order to apply a consistent strip of adhesive. After the adhesive has been applied to the valve a piston member compresses the valve from above in order to close the valve. Besides, there may be a sensory organ incorporated in the shield so as to ensure that adhesive is applied only after proper insertion of the adhesive sprayer into the valve of the bag. The apparatus ensures that the adhesive sprayer is properly inserted into the valve as the valve is opened and distended by the shield prior to the process, and in addition the sprayer will be placed at exactly the same spot every time it enters a valve due to its being fixed to the guiding shield.