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(11) | EP 0 922 638 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Method for filling a valve bag, and a valve bag |
(57) When filling a valve bag (1) with dust-producing or hazardous material through a
filling valve (5) arranged in a corner of the bag, use is made of a ventilating valve
(7) for evacuation of air, arranged in the opposite corner of the bag and having a
transversely folded filtering sheet (9), whose transverse fold faces outwards such
that during evacuation of air the ventilating valve (7) opens in U-shape from the
inside. After the filling operation, the filling valve (5) is directly sealed, whereupon
final evacuation of air, for instance by mangling, occurs through the ventilating
valve. |