I think you meant sprocket feed or tractor-feed paper. I actually went into a businesses still using tractor-feed paper and a dot matrix printer the other day. After purchasing my goods the printer spat out a receipt and they handed me a duplicate carbon copy from behind the main printout. I have even seen some of the little printers for receipts hooked up to swipe-cards that use a form of tractor feed for their receipts. The guys who came to install my new pay TV digital hard-drive recorder hooked up to a sat-dish also gave me a carbon copy duplicate tractor feed bit of paper that had been hand written on some parts but had mostly been filled in by a dot-matrix printer!
Was at a business the other day that had an old dot-matrix printer and noticed it was missing the ribbon. The tractor-feed Paper in it bled the colour where impacted by the head.
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