High Speed Printing Equipment
L. Rosen · Transactions of the IRE Professional Group on Instrumentation · 1953
passes were over one tape area or if different areas of the tape were used each time. Mr. Nordyke: The tape was read over the same area of tape which was of the order of 20 inches. Again I want to emphasize that this is a high figure even though we have obtained it. The total number of passes on a longer length of tape, or a tape in which there are weak spots, is much lower, although you will still get reliable tape operation. L. C. Hobbs (Radio Corporation of America, RCA Victor Division): You mentioned tape stretch during the rapid start-stop. Could you elaborate on this as to the magnitude of the velocity overshoot, and any steps taken to overcome it, aside from not using the tape during that time? Mr. Buslik: At the present speed of about 75 inches per second, I do not think the overshoot in speed is as serious as we have shown in the slides. The overshoot is approximately 10 per cent, but that can be modified by the distance between the reading station and the point where the tape is actually being driven. When I said that we have accomplished a 5-millisecond start time, it does not mean that we are starting to read or record at that timewe have also incorporated a safety factor in the start and stop time. Also, we feel that by the use of other backing materials that are somewhat stiffer than the present acetate tape, this stretching can be reduced. J. L. Hill (Engineering Research Associates, Inc.): It is apparent that there is some