Tape fast-forwarding and rewinding apparatus

A tape fast-forwarding and rewinding apparatus comprising:

• rotating means for rotating a tape take-up side reel in a direction so as to take up a tape upon tape fast-forwarding mode, and for rotating a tape supply side reel in a direction so as to take up the tape upon tape rewinding mode;
• rotation driving means for driving said rotating means so that the tape which is taken up by said tape take-up side reel or said tape supply side reel travels at a first fast-forwarding or rewinding speed, and so that the tape travels at a second fast-forwarding or rewinding speed which is a high speed faster than said first fast-forwarding or rewinding speed;
• detection means for substantially detecting the radii of tape rolls of wound tape which are wound around both the take-up side and the supply side reel rotated by said rotating means.
• memorizing means for memorizing a ratio between the radii of the tape rolls of wound tape which are substantially wound around both the reels obtained by said detection means, when said tape is travelling at said first fast-forwarding or rewinding speed;
• and
• controlling means for controlling said rotation driving means so that said tape travels at said second fast-forwarding or rewinding speed after travelling at said first fast-forwarding and rewinding speed, and controlling said rotation driving means so that the speed of said tape becomes said first fast-forwarding or rewinding speed from said second fast-forwarding or rewinding speed when a value which is a reciprocal of the ratio between the radii of the tape rolls of wound tape which are substantially wound around both the reels obtained by said detection means when said tape is travelling at said second fast-forwarding or rewinding speed, is equal to the value of the ratio memorized in said memorizing means, as a result of comparison performed.