Facit 4021 papertape reader

UvA Computer Museum catalogue nr 98.21

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The Facit 4021 is a Swedish made (1974) papertape reader, reading up to 300 characters per second. It is built for heavy industrial use (like numerical control of tool machines). Bidirectional operation is possible. It uses optical reading but can nevertheless read tapes that are almost transparent, and independent of ambient light. The drawing has been taken from the reader's Technical Description. The reader has been in use at the Physics Laboratory of the University of Amsterdam.