Abstract: A bag supply device used in a rotary bag-filling packaging machine and including: an empty-bag holding member for holding a bag, a reciprocating mechanism for moving the empty-bag holding member back and forth between a bag receiving position and a bag delivery position, a first turning mechanism for turning the empty-bag holding member around a first axis parallel to a bag width direction thereof upon operation of the reciprocating mechanism and orienting the holding face of the empty-bag holding member vertically in the delivery position, and a second turning mechanism for turning the empty-bag holding member around a second axis parallel to a bag length direction thereof and causing the bag held by the empty-bag holding member in the delivery position to be directly across from the pair of grippers stopped in the empty bag supply position.

Abstract: A bag supply device used in a rotary bag-filling packaging machine and including: an empty-bag holding member (9) for holding a bag (B), a reciprocating mechanism (13) for moving the empty-bag holding member back and forth between a bag receiving position and a bag delivery position, a first turning mechanism (14) for turning the empty-bag holding member around a first axis (O1) parallel to a bag width direction thereof upon operation of the reciprocating mechanism and orienting the holding face of the empty-bag holding member vertically in the delivery position, and a second turning mechanism (15) for turning the empty-bag holding member around a second axis (O2) parallel to a bag length direction thereof and causing the bag held by the empty-bag holding member in the delivery position to be directly across from the pair of grippers stopped in the empty bag supply position.

Abstract: A vertical bag packaging machine has a steam nozzle that is inserted into a bag to inject steam thereinto after an article to be packaged has been filled into the bag, thereby replacing the air in the bag with the steam to effect deaeration. After the steam-replacement deaeration, a seal portion to be ultrasonically sealed is preheated by a preheating device, thereby making the temperature of the seal portion uniform throughout it. The preheating temperature is not lower than a temperature of a highest temperature region of said seal portion before it is preheated and below a melting temperature of a material constituting an inner side of said bag Thereafter, the seal portion is ultrasonically sealed by an ultrasonic sealing device. Thus, reliable and stable ultrasonic sealing can be realized.

Abstract: A vertical bag packaging machine has a steam nozzle that is inserted into a bag to inject steam thereinto after an article to be packaged has been filled into the bag, thereby replacing the air in the bag with the steam to effect deaeration. After the steam-replacement deaeration, a seal portion to be ultrasonically sealed is preheated by a preheating device, thereby making the temperature of the seal portion uniform throughout it. The preheating temperature is not lower than a temperature of a highest temperature region of said seal portion before it is preheated and below a melting temperature of a material constituting an inner side of said bag Thereafter, the seal portion is ultrasonically sealed by an ultrasonic sealing device. Thus, reliable and stable ultrasonic sealing can be realized.