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Elevated Temperature Automatic Card Handler

IP.com Disclosure Number: IPCOM000076956D
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Smith, FH: AUTHOR

Abstract

The apparatus of the drawing, tests the electrical characteristics of a circuit card 2 at a precisely controlled temperature. The card 2 is held on a track 3 with the card connector 4 resting on the upper surface of the track. In the heating station, deionized water from a source 5 is sprayed onto both sides of the component mounting surfaces of the card, but is kept away from the connector 4. The card is quickly heated to a very precise temperature.

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Elevated Temperature Automatic Card Handler

The apparatus of the drawing, tests the electrical characteristics of a circuit card 2 at a precisely controlled temperature. The card 2 is held on a track 3 with the card connector 4 resting on the upper surface of the track. In the heating station, deionized water from a source 5 is sprayed onto both sides of the component mounting surfaces of the card, but is kept away from the connector 4. The card is quickly heated to a very precise temperature.

The card is then moved quickly to the test station without any preliminary drying operation and apparatus 7 engages connector 4 for the electrical test. On circuits having transistors or other components of suitable low impedance, the tests can be conducted satisfactorily even though the card carries water droplets from the heating station.

At the end of the electrical test, card 2 is moved to the drying station where most of the water is blown off by an air source 8. The heat of the card and the components helps to further dry the card. The use of water for heating the card reduces the heating time and it improves the temperature control.

As an optional step, the cards may be preheated in hot air to a temperature a few degrees below the test temperature before they are advanced to the heating station. However, this conventional air heating step is not necessary, because the water heating is rapid and precise.

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