Package making – Gas filling and/or evacuating of receptacle and closing – Pressure responsive and/or regulation
Patent
1986-11-06
1988-03-29
Coan, James F.
Package making
Gas filling and/or evacuating of receptacle and closing
Pressure responsive and/or regulation
53202, 141126, B65B 312
Patent
active
047335173
ABSTRACT:
The present invention relates to an apparatus for filling bags with a material and for sealing them, and it can carry the bags in a direction of a bag thickness. A first feature of the present invention resides in that, in the case that the bags are arranged between a pair of chain conveyors disposed in parallel vertical planes, they are gripped by plural pairs of grippers mounted on a pair of axes extending through each rectangular parallelepiped carrier. Further, A second feature of the present invention is that the apparatus according to the present invention is equipped with nozzles for introducing a compressed gas into the bags and pressure gauges for measuring a pressure within the bags in order to detect whether or not each bag is normally gripped by the grippers. Furthermore, another feature of the present invention is that a return pipe is fixed to a filling device so that the filling material may be returned to a storage tank, without being discharged therethrough, by closing the filling nozzle. Still another feature of the present invention is that seal bars for sealing the bags are covered with a heat-resistant cloth, and the cloth is sent out in turn to maintain uniform sealing conditions.
REFERENCES:
patent: 3710541 (1973-01-01), Izumi
patent: 3982376 (1976-09-01), Ikeda
patent: 4108300 (1978-08-01), Hayase et al.
patent: 4648154 (1987-03-01), Meinen
Coan James F.
Mitsubishi Jukogyo Kabushiki Kaisha
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