Browse Prior Art Database

Encoder for Magnetically Striped Document

IP.com Disclosure Number: IPCOM000075834D
Original Publication Date: 1971-Nov-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 25K

Publishing Venue

IBM

Related People

Demchyshyn, B: AUTHOR

Abstract

A magnetic stripe on either the front or back face of a document, such as a credit card, may be encoded left-to-right or right-to-left in-line with embossing, punching, or other operations.

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Encoder for Magnetically Striped Document

A magnetic stripe on either the front or back face of a document, such as a credit card, may be encoded left-to-right or right-to-left in-line with embossing, punching, or other operations.

As credit card 1 (Fig. 1) moves leftward (Fig. 2) on end along path 2 between write head 3 and roll 3a, head 3 will write magnetic indicia left-to-right on magnetic stripe 4 on the front or back face of the card, whichever faces the head. To write right-to-left on stripe 4, card 1 is rotated 180 degrees by turntable 5 before encoding so that stripe 4 faces write head 6 as card 1 moves on end leftward between the head and roll 6a.

Turntable 5 comprises two sets of drive rolls 8 and spring-loaded pinch rolls
9. When no card reversal is required, cards 1 advance incrementally through each set of rolls. When card reversal is desired, circuitry (not shown) including a photocell and light source is conditioned so that as the leading edge of the card approaches the nip of the downstream set of rolls 8,9, turntable 5 will be rotated 180 degrees; whereupon the drive direction of rolls 8 will be reversed to drive the card leftward. Turntable 7 is needed only if subsequent in-line operations require restoration of the card to the orientation it had before reversal by turntable 5.

Where the indicia is to be written in the reverse order to that on the input tape, the indicia for each card can be entered into a buffer and then read out on a first-in...