Prerecorded cassette for a system for magnetically...

Details Prerecorded cassette for a system for magnetically... Prerecorded cassette for a system for magnetically...

G - Physics

11

B

G11B 23/30 (2006.01) G11B 5/78 (2006.01) G11B 23/087 (2006.01)

Patent

CA 2067879

PHN 13.701 10 08.07.1991 ABSTRACT: "Prerecorded cassette for a system for magnetically recording/reproducing signals" A prerecorded cassette (1) belongs to a system for magnetically recording/reproducing signals on/from magnetic tape in accordance with a standard, which system comprises apparatuses and cassettes compatible therewith, which cassettes comprise two parallel main walls and interconnecting transverse walls and occur with prerecorded tape (prerecorded cassettes 1) and with blank tape (blank cassettes 3), which standard specifies a tape length marking which can be detected by an apparatus and which marks the length of the magnetic tape in a cassette by a pattern of openings (33-37) in a marking zone (39) of a main wall (19) of a cassette (3), which tape length marking comprises a plurality of submarkings (33-37) in a binary multi-bit code, the value of each bit being defined by the presence/absence of an opening. With the prerecorded cassettes (1) a tape length marking is dispensed with completely and information about the playing time and information about the position on the tape are recorded on the tape as time code. Preferably, the system specification for the erase protection is such that, to indicate the impossibility of home recording, the prerecorded cassette does not have an erase protection opening at all. As a consequence, the prerecorded cassette (1) is not suitable, and can hardly be made suitable, for home recording. If the cassette is provided with a permanent label (55) the relationship betweenthe recording and the information on the label will be maintained for the entirelife of the cassette.

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