| 摘要 |
A method for raising flattened tubular blanks by rolling them out, or folding them by nearly 180 DEG and reforming them to a square-shaped cross section uses the device comprising at least two discharging rollers (1, 1') for rolling out flattened tubular blanks (C) on a rolling line, and a pusher moving mechanism (4) for pushing the blanks (C) on said rolling line first into an overfolded position and thereafter, upon returning the pusher (2) to the original position, forming the square-shaped cross section of the blanks. |
