| 摘要 |
<p>PURPOSE:To detect accurately the position of a tape loop, by measuring a change of the electric resistance value of the pressure-sensitive rubber which is pressed by a tape. CONSTITUTION:When the air within a column 11 is adsorbed by a blower, the air existing at the part higher than a tape loop 6 in the column 11 flows once out to a space 17 through a slit 16 and then flows into the lower side of the loop 6 through the slit 16. With such a flow of the air, a ''Mylar '' tape 13 is pressed to a box 12 at the part higher above the loop 6 by the air flowing toward an arrow mark and then pressed to the pressure-sensitive rubber 14 at the part lower than the loop 6 by the air flowing into the slit 16 after going round the back of the tape 13. Therefore the length is varied for the part of the rubber 14 which is pressed by the tape 13 and in response to the position of the loop 6.</p> |
