Aperture Card Scanning Services

DK Global, Inc's Aperture Card Scanning services provides you with a un-matched quality and turn around time for most projects. With our State-of-the-Art scanners and Quality Control team, you can rest assured that DK Global, Inc will deliver a quality product.

Aperture Cards are a marriage of old-style IBM punch cards and microfilm.
A cut-out aperture area on the card contains a 35mm microfilm image of a document, typically a blueprint or other engineering drawing. Information about the drawing (such as the title, version, page, etc) is punched into the card (in what is called Hollerith code) and printed along the top.

An aperture card scanner reads the punch data and scans the microfilm window. The result is a digital image similar to what is produced by a paper scanner. The punched textual information is often used to automatically index the scanned image, allowing unattended batch input of thousands of cards at a time.

As strange as this medium may seem, it is actually a compact way to store hundreds of thousands of engineering drawings that would otherwise take up warehouses full of paper blueprints. Of course, as efficient as aperture cards may be. At DK Global, we have repeatedly demonstrated to our cusomers that the digital storage option affords significant savings of space, time and expense.