PLASTIC BAG MAKING APPARATUS

摘要

An apparatus is improved to successively make plastic bags each of which includes an end surface provided with a spout, by employing the general feeding way of panel material, to be simple in structure, low in cost, high in speed and to make it possible to successively make the plastic bags two by two. A first folded portion is formed in a first web of panel material 1. An aperture is formed in a second web of panel material 2. A spout is inserted into the aperture, the spout and the second web of panel material 2 being heat sealed with each other. The second web of panel material 2 is guided by a guide device 18 to be folded after being heat sealed so that a second folded portion should be formed in the second web of panel material. The spout is turned over by the second folded portion. The second folded portion and the first folded portion are heat sealed with each other while the second folded portion and the second web of panel material 2 are heat sealed with each other about the spout.

主权项

1. An apparatus for successively making plastic bags each of which includes an end surface provided with a spout, the apparatus comprising:
a feeding device by which first and second webs of panel material are disposed along a horizontal plane and fed longitudinally thereof and intermittently, the first web of panel material being previously folded along a first longitudinal folded line extending adjacent to one side edge so that a first folded portion should be formed in the first web of panel material, the second web of panel material being then superposed with the first web of panel material on opposite side to the first folded portion to have one side edge protruding beyond the first longitudinal folded line at a distance; an aperture forming device by which an aperture is formed in the second web of panel material at a position between the one side edge of the second web of panel material and the first longitudinal folded line when the first and second webs of panel material are stopped temporarily; a spout inserting device by which a spout is inserted into the aperture; a spout seal device by which the spout and the second web of panel material are heat sealed with each other when the first and second webs of panel material are stopped temporarily; a guide device by which the second web of panel material is guided to be folded along a second longitudinal folded line extending between the spout and the first longitudinal folded line when the first and second webs of panel material are fed after the spout and the second web of panel material are heat sealed so that a second folded portion should be formed in the second web of panel material, the spout being turned over by the second folded portion, the second folded portion being superposed with the first folded portion; and a circumferential seal device by which the second folded portion and the first folded portion are heat sealed with each other while the second folded portion and the second web of panel material are heat sealed with each other about the spout when the first and second webs of panel material are stopped temporarily, the end surface being formed by the second folded portion to be provided with the spout.