Microfilm Aperture Card System

Download or read book Microfilm Aperture Card System written by Thomas H. Korte and published by . This book was released on 1960 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The microfilm aperture card system, which is a new concept in the storage, reproduction, and distribution of engineering drawings, and associated data is discussed. The microfilm aperture card is a common, ordinary tabulating punch card. A rectangular hole or aperture is die-cut into this card. The hole is edged with a narrow, transparent adhesive ledge. To this adhesive ledge is affixed a segment, or frame, of microfilm containing a transparency of an engineering drawing. Factual information to the drawing is punched into the card and automatically printed along the top edge. The new system will operate as follows: instead of furnishing full-size vandykes of drawings by contract, the aircraft and supporting industries of the US will furnish microfilm and punched tabulating cards to the central AF automation control. From these, master microfilm aperture cards will be generated for the AF central drawing repository. The new method combines the advantages of microfilm with the operational precision and speed of automatic tabulating equipment. The system overcomes the problems of excess storage space and shipping-weight as well as the problems of high-cost and low-output-rate formerly associated with comprehensive handling of engineering drawings.