Tape recording and reproducing apparatus having a device for establishing the type of cassette

摘要

For establishing the type of cassette of a tape cassette (1) of an information carrier (6) in tape form, loaded into a recording or reproducing apparatus, the instantaneous circumference (U1x, U2x) of the two tape rolls (4, 5) of the tape cassette (1) is measured by a measuring device (19) and from this the sum of the square of the instantaneous circumference of the two tape rolls is formed in an arithmetic device (20) and this sum is compared in a comparator (21) with comparison value ranges (VKn) to detect the type of tape cassette (Kn). <IMAGE>