MAGNETIC CARD TRANSPORT

摘要

A magnetic card transport which includes three drive rollers. A forward drive roller for driving the magnetic card toward the entry throat for recording character by character and for ejecting the card from the transport; a reverse drive roller for positioning the card in an opposite direction for read checking a previously recorded character; and a high speed reverse drive roller for positioning the card at the beginning of a track during initial entry from the throat and from the end of a previously recorded track. The three drive rollers continuously rotate beneath the card and the card is caused to move by application of a pinch roller to the card to press it into rolling contact with its associated drive roller. A fixed guide rail is provided and the card is biased against the fixed guide rail by means of guide springs. Further, to prevent misalignment of the card during reading and writing the pinch rollers associated with the forward and reverse drive rollers are canted such that the resultant moments of force are in a direction to bias the card against the fixed drive rail.