Browse Prior Art Database

Variable Thickness Magnetic Card Reader/Writer

IP.com Disclosure Number: IPCOM000084679D
Original Publication Date: 1975-Dec-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 3 page(s) / 67K

Publishing Venue

IBM

Related People

Decker, DD: AUTHOR [+2]

Abstract

An apparatus for reading and encoding information on a magnetic identification card, or the like, includes a motorized magnetic card reader/encoder having a spring loaded head to adjust to cards of different and of variable thickness, and an emitter driven by the card to clock data to the write head.

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Variable Thickness Magnetic Card Reader/Writer

An apparatus for reading and encoding information on a magnetic identification card, or the like, includes a motorized magnetic card reader/encoder having a spring loaded head to adjust to cards of different and of variable thickness, and an emitter driven by the card to clock data to the write head.

Two molded plastic side plates 10, 12 house four driven urethane covered capstans 14, 16, 18, 20. Drive is based on an 1500 RPM reversible synchronous motor 50 driving the capstans through a speed reduction flywheel 22. The capstans are mounted in ball bearings and are located slightly less than one card length apart.

A commonly pivotable spring 24 loaded upper member 25 contains the read and write station pressure rollers 26, 25 and two photoelectric card position detector devices PC1, PC2, one mounted near each station. Emitter disk 30 is attached to and driven by write station pressure roller 28, and photoelectric detection device 32 senses optical marks 31 on disk 30.

Independently suspended and located adjacent to the read and the write stations are read head 34 and write head 36. Read head 34 may be a dual-track magnetic playback head located to read back signals from tracks 2 and 3 of a 3- track credit card 38 being processed. Write head 36 may be a single-track magnetic encode head located to encode signals on track 3 of card 38.

The entry/exit and escrow stations each utilize solenoid 44, 46 actuated pressure rollers 40, 42 (decouplers) that are closed (pinch applied) when energized.

There are two sense switches SW1, SW2 mounted near the entry/exit station and one sense switch SW3 mounted near the escrow station 52.

As card 38 enters the transport, the first sense switch SW1 is activated and the motor 50 is energized in the forward direction. After a short time delay to allow the capstans to reach thei...