公开(公告)号：CA1056500A

公开(公告)日：1979-06-12

申请号：CA201663

申请日：1974-06-04

Applicant: IBM

Inventor： AGNEW MARK C ,  SAVAGE JOHN E JR ,  TURNER THOMAS O

IPC: G11B5/09 ,  G06K7/08 ,  G06K13/07 ,  G11B17/34 ,  G11B15/29

Abstract: READ/WRITE MACHINE FOR MAGNETIC STRIPED DOCUMENT CARD A read/write machine for a document card having a stripe of magnetic material thereon, the machine including a magnetic read/write head and a pair of nipped roils between which the card moves for transporting the card and particularly its stripe of magnetic material over the read/write head. Controls are included for selectively returning the card to its original position in the machine after a reading or writing operation has occurred for allowing the operator to remove the card from the machine, or alternately automatically moving the card in a second pass over the head in the same direction as the first pass of the card thereover so that any data written on the card during its first passage over the head may be read therefrom by the head, or alternatively causing the card to move in three forward passes through the machine, with the third pass being used for checking the magnetic bits as previously recorded and previously read during previous forward passes of the card through the machine.

公开(公告)号：CA1062804A

公开(公告)日：1979-09-18

申请号：CA227640

申请日：1975-05-23

Applicant: IBM

Inventor： LAGOE DUNCAN J ,  SAVAGE JOHN E JR

IPC: G06K1/12 ,  G06K13/067 ,  G11B31/00

Abstract: DOCUMENT SENSING DEVICE A sensing device for a series of document tickets which carry longitudinally extending magnetic stripes with interruptions between the stripes of consecutive tickets, the sensing device including a light source positioned opposite one face of the ticket and a light detector positioned opposite the other face of the ticket and in alignment with the light source. The sensing device is in alignment with the magnetic stripe of a ticket passing through the sensing device so that light is completely blocked to the detector from the light source by the stripe, and the interruptions between stripes of consecutive tickets allow light from the source to impinge on the detector for locating ends of the tickets.