Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Synchronous Card Reader

IP.com Disclosure Number: IPCOM000085316D
Original Publication Date: 1976-Mar-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 54K

Publishing Venue

IBM

Related People

Arndt, RL: AUTHOR [+3]

Abstract

The reader 10 has a curved card transport path 12 whereby a document card to be read may be inserted into entry slot 14 and is discharged through discharge slot 16, both located on the front panel of reader 10. Reader 10 is driven from the usual 60 cycle per second public power source 18, so that clocking signals on a line 19 derived from power source 18 may be used for monitoring card motion through reader 10.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 65% of the total text.

Page 1 of 2

Synchronous Card Reader

The reader 10 has a curved card transport path 12 whereby a document card to be read may be inserted into entry slot 14 and is discharged through discharge slot 16, both located on the front panel of reader 10. Reader 10 is driven from the usual 60 cycle per second public power source 18, so that clocking signals on a line 19 derived from power source 18 may be used for monitoring card motion through reader 10.

The document cards to be read may be conventional 80-column record cards. Reader 10 comprises a pair of card drive rolls 20 and 22, and roll 22 is driven from synchronous motor 24 connected to power supply 18. The document card is inserted lengthwise through slot 14 to drive roll pair 20-22; and this length of insertion, the curved nature of transport 12 and an aligner spring 26 minimize the skew that the operator can apply to the document card. Reader 10 includes the sensor array 28 acting as a read station and is provided in substantial alignment with the centers of rolls 20 and 22.

The motor 24 for driving roll 22 has sufficient torque capability to operate in synchronism with the power supply 18 for all drive loads likely to be encountered. The speed of motor 24 and the diameter of drive roll 22 are chosen such that a clock signal on line 19 derived from the power supply 18 with its frequency octupled, will provide 16 pulses per card column. Since motor 24, the document movement and power supply 18 are synchronized, the clock si...