The Echo-matic II was a two-track endless-loop magnetic tape cartridge invented by Bernard Cousino and marketed by Orrtronics.
It was intended for use in commercial applications such as point of sale, most famously as the audio system for the Zolton fortune teller arcade machine. The players allowed the tape to run continuously or to stop after a single play.
Cousino invented the use of tape treated on the back with colloidal graphite, which not only lubricated the tape in the pack but conducted away static. This was first used in 1952 in the Audiovendor cartridge which looped the tape around the heads of an open-reel tape recorder and was later developed as the Echo-matic enclosed cartridge.
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