| 摘要 |
This invention relates to an improvement in a feeder mechanism at an exposure station of a photoprinting machine, in which a transport device is connected to a first rotary drive for transporting a copying material through the exposure station and in which a second rotary drive is provided which may be operated at variable speeds relative to the speed of the first rotary drive and which is connected to a roller at the beginning of the transport path of an original to be copied, the improvement comprising an additional pair of preceding rollers positioned in the transport path of the original upstream of the transport device in the direction of transport, means connecting said pair of preceding rollers to said variable speed second rotary drive which may be switched in order to drive said pair of preceding rollers optionally at a speed corresponding to the transport speed of the transport device or at a lower speed, switching means in the transport path between said pair of preceding rollers and the transport device, means connecting said switching means to the variable speed rotary drive of the pair of preceding rollers whereby their speed is lower than the transport speed as long as the switching means are in a first switching position, not actuated by an original, and the speed of the preceding rollers corresponds to the transport speed when the switching means are changed to a second switching position by an original to be copied.
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