B - Operations – Transporting – 65 – H
Patent
B - Operations, Transporting
65
H
271/48
B65H 20/20 (2006.01)
Patent
CA 1080266
ABSTRACT A drive tractor of the type usually mounted in pairs at opposite edges of a web of edge-perforated sheet material such as printout paper has an endless drive belt mounted on a chassis. The drive belt has pin members projecting from it to engage edge perforations in the web and is engaged with a drive wheel having sprocket teeth which engage a drive formation on the inner surface of the belt. The sprocket wheel is engaged by a drive shaft to be driven thereby. The sprocket teeth and belt tread are respec- tively configured to mesh only in a predetermined relative position of the pin members relative to the rotational position of the drive wheel. The drive wheel is configured to seat on the drive shaft in a predetermined rota- tional orientation. Therefore, when a pair of such tractors in mounted on a common drive shaft their respective drive wheels are in the same rotational orientation which automatically transversely aligns the respective pin mem- bers of the paired tractors.
314568
Data Motion
Na
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