Irregularly Shaped Tractor Belt Tooth
Original Publication Date: 1985-Feb-01
Included in the Prior Art Database: 2005-Feb-18
A technique is described whereby an irregularly shaped barrel tooth is used in tractor belts of paper drive mechanisms. By using this concept, a much smoother entry and exit of the drive tooth provides less stress on the perforations and the drive holes of multi-part forms, thus reducing the possibility of paper damage. The irregularly shaped barrel tooth, as shown in the figure, has its drive pin 10 positioned in the hole in the paper 11. The drive pin 10 is attached to drive form 12, which is attached to flexible band belt 13, which moves from left to right. The optimum offset angle 14 to drive the paper is determined as a relation of the barrel center line 15 to the normal center line 16, to determine the smoothest transition of the drive pin 10 entering the hole 11.