The Berkeley distributed video-on-demand system

This invention contemplates a magnetic tape duplicating apparatus in which a recorded master tape is set in close contact with an unrecorded slave tape with their magnetic layer surfaces set in contact with each other and they are applied with heat or a magnetic field thereby to effect a duplication of information recorded in the master tape onto the unrecorded tape. Both of the tapes with their magnetic surfaces in contact with each other are wound on the same take-up reel and they are rewound under the application of heat or a magnetic field whereby the duplication is carried out with intimate contact, without causing a displacement therebetween, and a high speed duplication is attained.