Abstract: In an image transfer apparatus comprising two separate image carrying media, such as endless belts, from one of which image information can be transferred to the other medium by temporarily holding the two media in frictional contact with one another, each of the media is advanced at constant or substantially constant speed by its own drive system; the drive system of a first medium comprises a feedback control system which controls the speed of that medium so that a measuring signal which is delivered by a measuring circuit and represents the measured speed of the first medium is equal to a reference signal delivered by a reference source; and during each transfer interval, when the two media are being advanced at the same speed under the frictional force of their contact with one another, the feedback control of the speed of the first medium is interrupted and an adjusting signal is produced by which the relationship of the measuring and reference signals is adjusted so that the speed of the first medium wi