| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable air brought into between a belt and a tape to get away without roughening the surface of belt and to impart a stable tape tension without damaging the tape even at the time of a high speed running. SOLUTION: As the tape driving belt 3 in the recording tape cartridge of belt driving system for making the tape run by the tape driving belt, the tape driving belt provided with plural holes 7 penetrating the front and rear sides is used, while the longitudinal diameters of the holes are 1/200-1/2 of the width of driving belt and the quantity of these holes is 10-1000 pieces per 1cm<2> .</p> |
