Endless tape cartridge

The cartridge was invented by sound engineer Bernard A. Cousino and it dominated the North American market for many years.

[8] PlayTape and the 8-track tape and endless compact cassettes for the announcement text of answering machines were made with this technique.

[clarification needed] There was no rear winding roll inside such a cassette so rewinding was impossible.

Previously, a similar technique was used to store Tefifon's vinyl sonic tape in the Tefi cartridge.

Another invention patented by Cousino was the graphite coating applied to the bottom side of the tape in endless cartridges.