A device for feeding and discharging originals in sheet form

Claim 1

A device for feeding originals in sheet form to and discharging them from an exposure window (10) of a copying machine, comprising: - a holder (4) for a pile of orginals (4a), - a separator device (3, 6) for taking originals from the pile one by one, - a feed path (7) for guiding the originals from the pile to the exposure window, - a co-operating pair of rollers (8, 9) mounted in the feed path for conveying the originals in the feed path, - a conveyor device (11) which can be driven in a first direc­tion for conveying the originals from the feed path to and over the exposure window and can be driven in the opposite second direction for removing the originals from the exposure window, - a discharge path (14) for returning the originals from the exposure window to the pile, and - drive means which drive the pair of rollers (8, 9) in a direc­tion in which the pair of rollers together with the conveyor device convey originals during or substantially during the periods of time in which the conveyor device is driven in the first direction, characterised in that the drive means are provided with coupling means (18, 19, 29) which stop the pair of rollers (8, 9) or reverse the direction of movement of the pair of rollers during or substan­tially during the periods of time in which the conveyor device is driven in the second direction, there being a fixed time relationship between the times at which the states of movement of the pair of rollers and the conveying direction change.

Claim 2

A device for feeding originals in sheet form to and discharging them from an exposure window (10) of a copying machine, comprising: - a holder (4) for a pile of orginals (4a), - a separator device (3, 6) for taking originals from the pile one by one, - a feed path (7) for guiding the originals from the pile to the exposure window, - a co-operating pair of rollers (8, 9) mounted in the feed path for conveying the originals in the feed path, - a conveyor device (11) which can be driven in a first direc­tion for conveying the originals from the feed path to and over the exposure window and can be driven in the opposite second direction for removing the originals from the exposure window, - a discharge path (14) for returning the originals from the exposure window to the pile, and - drive means which drive the pair of rollers (8, 9) in a direc­tion in which the pair of rollers together with the conveyor device convey originals during or substantially during the periods of time in which the conveyor device is driven in the first direction, characterised in that the drive means are provided with coupling means (18, 19, 29) which stop the pair of rollers (8, 9) or reverse the direction of movement of the pair of rollers during or substan­tially during the periods of time in which the conveyor device is driven in the second direction, there being a fixed time relationship between the times at which the states of movement of the pair of rollers and the conveying direction change.