초록 ▼

Method of and apparatus for forming, filling and sealing packages in which flexible packaging material is formed into tubing, the tubing is fed downwardly and transversely heat sealed at package length intervals by closing a pair of sealing members, a quantity of the product with which the packages

Method of and apparatus for forming, filling and sealing packages in which flexible packaging material is formed into tubing, the tubing is fed downwardly and transversely heat sealed at package length intervals by closing a pair of sealing members, a quantity of the product with which the packages are to be filled is delivered into the lower end of the tubing to provide a fill for each package, the tubing is pinched closed, after the delivery of each fill, above the level of the next seal to be made, the pinch is maintained as the sealing members are opened, following the formation of each seal, to keep product for the next fill from dropping down on the seal, and air is blown on the seal to cool it while the pinch is maintained.

대표청구항 ▼

The method of forming, filling, and sealing packages comprising: forming flexible packaging material into tubing, the tubing extending downwardly; feeding the tubing downwardly and heat sealing it to form transverse seals spaced at package length intervals, the seals being formed by a pair of sealin

The method of forming, filling, and sealing packages comprising: forming flexible packaging material into tubing, the tubing extending downwardly; feeding the tubing downwardly and heat sealing it to form transverse seals spaced at package length intervals, the seals being formed by a pair of sealing members movable relative to one another between a fully open position and a closed position in sealing engagement with the tubing; and delivering a quantity of the product with which the packages are to be filled into the tubing to provide a fill for each package; wherein the improvement comprises: pinching the tubing closed above the sealing members after the tubing has been fed downwardly each package length interval and following the completion of the delivery of the fill for the next package to be formed, thereby to keep product for the next fill from dropping down in the tubing onto the next seal; closing the sealing members to form the next seal; opening the sealing members to their fully open position; maintaining the pinch as the sealing members open generally until they reach their fully open position; and, while so maintaining the pinch to keep product from dropping down onto the next seal as the sealing members open generally until they reach their fully open position, blowing air on the seal to cool it starting with the initial opening movement of the sealing members and continuing generally until they reach their fully open position.