| 摘要 |
PCT No. PCT/SE95/01127 Sec. 371 Date Jun. 23, 1997 Sec. 102(e) Date Jun. 23, 1997 PCT Filed Oct. 3, 1995 PCT Pub. No. WO96/11871 PCT Pub. Date Apr. 25, 1996The invention relates to a method and apparatus for guiding a thin web material while folding the web material over a triangular former. The apparatus includes two guide rolls over which the web material is driven. The second guide roll is secured to a baseline of the triangular former. The triangular former and the guide roll may be tilted back and forth about a longitudinal axis of a bearing axle extending through a tip of the triangular former. The longitudinal axis is parallel with the web material extending between the two guide rolls. The position of the triangular former is controlled by a non-contacting edge scanning member that scans the position of the web material on the guide roll and causes the adjustment device to tilt the guide roll and the triangular former to ensure that the edges of the folded web material are precisely aligned. |
