Aperture Card Scanning Services

Accu-Image provides scanning of 35mm aperture cards. Our scanners feature image enhancement capabilities as well as the ability to read the punched Hollerith data to create the file name.

Aperture cards are used for engineering drawings from all engineering disciplines. The U.S. Department of Defense once made extensive use of aperture cards, and some are still in use, but most data is now digital.[1]

Information about the drawing, for example the drawing number, could be both punched and printed on the remainder of the card. With the proper machinery, this allows for automated handling. In the absence of such machinery, the cards can still be read by a human with a lens and a light source.