| 摘要 |
<p>An advancing apparatus for sheet film (17) has a first pair of transport rollers (3, 5) effecting transport of a sheet film (17) fed to the roller nip by suction means. The pair of transport rollers (3, 5) mounted on rotatable shafts (2, 4) is associated with a reflective switch (14) provided in the transport path of the sheet film. The reflective switch (14) arranged above the transport path of the sheet film (17) is associated with a mirror (10c) which is positioned beneath the transport path of the sheet film (17) and towards which the sensor of the reflective switch (14) is directed. Mirror (10c) is mounted to a retaining means (10) which is supported in a space-saving manner on the shaft (2) arranged beneath the film transport path and positively engages with a stationary stop means (11) preventing rotation. With respect to the transport plane of the sheet film (17), mirror (10c) is arranged in an inclined position so that the sensor directed towards the mirror also extends at an angle relative to the sheet film plane. This arrangement guarantees that no erroneous signals are produced since a sheet film (17) passing the reflective switch (10c, 14) deflects the sensor beam so as to be ineffective. <IMAGE></p> |
