| 主权项 |
1. Apparatus for producing a bag filled with a flowable particulate material, said apparatus having plural stations one of which being a valve applicator station, said at least one of said stations being configured to form a bag from a continuous tube of flexible material and for introducing the flowable particulate material into the bag to produce a filled bag having an open mouth, said apparatus being configured for moving said filled bag along a path through said valve application station, said valve application station comprising a valve applicator mechanism and a cutting and heating mechanism, said valve applicator mechanism and said cutting and heating mechanism each being configured for movement along said path in synchronism with the movement of the bag along said path, said valve applicator mechanism being configured for holding a one-way valve thereon and being configured to be moved with respect to the bag for insertion within the bag as the bag is moved along said path to dispose the one-way valve against a portion of the interior of the bag, said cutting and heating mechanism also being configured to be moved with respect to the bag as the bag is moved along said path to dispose said cutting and heating mechanism in alignment with the one-way valve to cut a vent hole in the bag and for thermally securing the one-way valve to the bag, said valve applicator mechanism and said cutting and heating mechanism being configured to be moved away from the bag after the one-way valve is secured thereto and also moved backward along said path to a position to apply another one-way valve to another filled bag, said apparatus also being configured to seal the mouth of the bag after the one-way valve has been secured thereto. |
