At one time nearly all tractor feed printers pulled instead of pushed. Demand documents (i.e. tear off right above the print head) was not a concern for most printers. Reports were printed in batches, then separated by operators. Also, the paper was less likely to jam if you pull it through the paper path, rather than try to push it through. Ever see a paper jam on a 1200LPM chain printer? The operator could spend a good 15-20 minutes clearing out bits of shredded paper. Computer time was more expensive than the paper, no one cared if a few pages got wasted for form feeds. Jack peacock