Abstract: In a mass storage system, a method for controlling the stepping feed of an information medium (T) on which recording tracks are formed by stripes (T.sub.n) which run diagonally or vertically across the information medium is disclosed. According to this method, the feed of the information medium (T) begins after the completion of the recording or reading operation of data (DATA) upon a first recording track (T.sub.n) and prior to the completion of the checking of the content of the data (DATA). After that, it is determined whether the feed of the information medium is continued or reversed should be in accordance with the result of checking the content of the data (DATA). That is, when no error is detected as a result of the checking, the feed is continued so as to perform the recording or reading operation of data (DATA') upon a second recording track (T.sub.n+1).

Abstract: A cassette-type tape recording and/or reproducing apparatus having a tape guide drum with a rotary head moved in a circular path substantially coinciding with the drum circumference, and a holder spaced from the guide drum and locating a tape cassette in an operative position at which a plane passing through the tape in the cassette is inclined in respect to the plane of rotation of the rotary head; is provided with a tape loading apparatus having a tape guiding element guided for movement in a path extending from a first position for engaging the tape in the operatively positioned cassette, to a second position spaced substantially from the first position and at which the engaged tape is wrapped about the circumference of the guide drum, with at least a portion of the path leading to the second position of the tape guiding element being inclined relative to the plane of rotation of the head so that the tape wrapped on the circumference of the guide drum is arranged substantially helically in respect to the l

Abstract: A process for preparing silver halide emulsions having high sensitivity and contrast by adding water-soluble iridium compounds during precipitation or physical ripening and adding water-soluble iodide compounds and sulfer sensitizers during chemical ripening.