| 摘要 |
An apparatus and method for folding a container blank from a first channel shape to a final flat parallelogram shape by guiding the container blank along two parallel rails, past a plurality of grooved folding rollers, which are rotatably mounted at spaced locations along the rails. The rollers have top flange portions which abut the top of the container blank adjacent the folded edge and side faces abuting the container blank on the outer surface of the channel adjacent the folded edge, the side faces being increasingly inclined toward the container blank in the direction of motion of the blank along the rails to gradually fold the channel portion of the container blank back as the blank passes the rollers and forms the flattened parallelogram shape. The rollers may be separable into a top flange portion and a bottom side face portion which are adjustably engageable with each other to form grooves of varying depth to accommodate container blanks of varying thickness. |
