| 摘要 |
A trailing panel folding system for use in a blank folding machine. The system includes a rotatable shaft mounted below the pass path of the blanks and transverse thereto. A motor is connected to drive this shaft and an arm assembly is mounted on the shaft and includes an arm extending away from the shaft and a folding head for folding a trailing panel of a blank. An encoder is interconnected with the drive means to provide a pulsed output related to the velocity at which the blanks are moving along the path, and a blank sensor provides a trailing edge signal when the trailing edge of the sensed blank leaves the location. A programmable motor controller moves the arm assembly to a predetermined start position in which the folding head is disposed upstream of the shaft, causes the folding head to move to an up position wherein it overlies the folded trailing panel at a speed sufficiently fast to overtake and fold the panel, causes the folding head to dwell in the up position, and causes the arm means to move to a start position after the folded panel has moved from under the folding head. A method of folding a trailing panel of a carton blank is also disclosed.
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