Patent ID: 7335148

Claim:
A method of manufacturing a bag equipped with at least one spout, in which a supplied bag is gripped by bag-gripping members and intermittently transported along a closed transport path, and manufacturing steps including inserting of a spout in a bag mouth and sealing of the spout and bag mouth are sequentially performed at intermittently different halting positions, said method of manufacturing a bag equipped with a spout comprising the ordered steps of: at a spout inserting halting position, opening at least one bag mouth by a bag mouth opening means, inserting said spout in opened bag mouth, gripping the spout, which is inserted into the bag mouth, by spout gripping members and holding the spout at said spout inserting halting position, and inactivating said bag mouth opening means, thus releasing the bag mouth , and during that interval expanding a bag body by a bag body expanding means; transporting the bag and spout to a spout/bag mouth sealing halting position, with the spout being held by said spout gripping members and the bag body being expanded by said bag body expanding means; at the spout/bag mouth sealing halting position, executing sealing of the spout and bag mouth, and inactivating the bag body expanding means, thus releasing the bag body; and transporting the bag to a next halting position.