Patent ID: 6866264

Claim:
In a device for moving a sheet ( 17 ) transversely to its conveying direction, including a drive ( 10 , 11 , 12 ) for driving a spindle, and conveyor rollers ( 8 , 8 ′) attached to said spindle to grab a sheet ( 17 ) and move such sheet transversely under the influence of said drive, a blocking device comprising: at least two toothed gears ( 1 , 2 ) mounted in mutually engaging relation for rotation about respective spaced axes, said at least two toothed gears associated with said drive ( 10 , 11 , 12 ) for effecting transverse movement of said spindle, and thus such sheet, said toothed gears ( 1 , 2 ) respectively having blocking members ( 3 , 4 ), which, based on a certain gear transformation ratio of the two toothed gears ( 1 , 2 ), following a certain number of rotations of the toothed gears ( 1 , 2 ), strike each other and block the movement of the toothed gears ( 1 , 2 ) to prevent further transverse movement of said spindle.