Browse Prior Art Database

Power Eject Function for Identification Card Readers

IP.com Disclosure Number: IPCOM000119200D
Original Publication Date: 1996-Mar-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Kunigkeit, E: AUTHOR

Abstract

Banking self service machines have an Identification Card Reader (ICR) for reading and updating banking identification cards. In case of an AC power failure during an update cycle of the card, the information of the magnetic tracks may be destroyed and the card cannot be returned to the customer.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 79% of the total text.

Power Eject Function for Identification Card Readers

      Banking self service machines have an Identification Card
Reader (ICR) for reading and updating banking identification cards.
In case of an AC power failure during an update cycle of the card,
the information of the magnetic tracks may be destroyed and the card
cannot be returned to the customer.

      To avoid the destruction of the track data in the event of an
AC power failure, a big capacitor is connected to the ICR, providing
the energy for updating and ejecting the card.

      The capacitor is charged by the operating voltage of the
ICR motor moving the card.  Due to this fact, only about 30% of the
stored energy can be used to perform the card update and eject.
Then, the voltage of the capacitor is below the minimum operation
voltage of  the ICR motor.  Therefore, a capacitor with a big
capacity is needed.

      The following setup can reduce the capacity of the capacitor.
The capacitor providing the energy for the update and eject function
is charged by a x time higher voltage than the operation voltage of
the ICR.  This can be realized in an easy way by having the capacitor
inside the main power supply, which generates the needed voltage to
charge the capacitor.  In case of a power failure, the voltage of the
capacitor is converted to the value of the motor operating voltage.
A power failure signal indicates the ICR to start the update and
eject function.

      The stored energy...