| 摘要 |
PURPOSE:To get rid of any jam phenomenon in a sheet as well as to make a space on configuration smaller by installing a sheet conveying means which impresses frequency voltage on a vibrator, composes a standing wave to be formed in an elastic body, forms a progressive wave and gives conveying force to the sheet. CONSTITUTION:Frequency voltage is impressed on a vibrator 1 by a generator 6, and the frequency voltage phase-shifted as much as pi/2 is impressed on the vibrator through pi/2 phase shifter. In this connection, a frequency voltage effective value being impressed on vibrators 1, 2 is made equal. Thereby, the vibrators 1, 2 impressed with the frequency voltage vibrate, thus vibrating elastic bodies 3, 4. At a simple substance of these elastic bodies 3, 4, a standing wave with each equal wavelength is formed, but the vibrator 1 and the vibrator 2 are attached distant as far as (n+1/4)lambda, (where (n) is of natural number) and simultaneously these elastic bodies 3, 4 hold a sheet 5 between with proper force. Consequently, standing wave vibrations of the elastic bodies 3, 4 give some effect to each other via the pinched sheet 5, thus a progressive wave progressing in the same direction is formed in respective elastic bodies 3, 4. |
