Patent ID: 11912456
Assignee: ISHIDA CO., LTD.
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 5:
6. A tube member for a bagmaking and packaging device that guides downward contents entering the tube member from above and allows a packaging material to become wrapped around it to thereby form the packaging material into a tubular shape,
the tube member including a slot that extends in an up and down direction so that an inert gas delivered into the packaging material formed into the tubular shape and rising in a space between the packaging material formed into the tubular shape and the tube member flows en route through the slot to the space inside the tube member,
wherein any transverse section of the tube member where the slot is formed is closed C-shaped with exposed terminal edges of the walls of the tube member on either side of the slot facing each other, and
wherein a distance between the terminal edges of the walls which face each other is substantially constant along an entire length of the slot.