Patent ID: 7780589

Claim:
A device for manufacturing a tubular material bag, the device comprising: an expansion core having a free upstream end, wherein the expansion core is configured to allow a tubular material to pass over the expansion core before the manufacture of the tubular material bag; wherein the expansion core comprises two slots extending in a longitudinal direction, wherein the longitudinal direction is the direction that the tubular material passes over the expansion core; and the device further comprising two insertion plates configured to push the tubular material into a respective one of the longitudinal slots as the material passes over the expansion core; wherein the two insertion plates are configured to vary an amount of tubular material that is pushed into the longitudinal slots within a length of tubular material that corresponds to one tubular material bag, thereby varying the storage capacity of the tubular material bag; wherein the two slots are offset from each other in a direction transverse to the longitudinal direction.