Sheet separating system, sheet handling system, method for the frictional separation and feeding of sheets

Abstract

A paper separating system, based on the frictional separation and feeding of the uppermost sheet ( 13 ) from a stack ( 14 ) of sheets of paper and flat substrates over a hurdle ( 8 ) using a separating and feeding head ( 1 ) and a deflection mechanism ( 35 ) for the head ( 1 ), the head ( 1 ) and the deflection mechanism ( 35 ) having, in particular, a roller ( 7 ) and a driving means ( 4, 5, 6 ) for the roller ( 7 ) and a resetting means ( 10 ), a means ( 31, 32, 36, 37, 28, 30, 23, 27, 28 ) for definitively or temporarily stopping, delaying or slowing down the head ( 1 ) being provided in the region of a separating distance (d v , d 2 -d 1 ) between the hurdle ( 8 ) and head ( 1 ).

1 . Sheet separating system for the frictional separation and feeding of an uppermost sheet ( 13 ) from a stack ( 14 ) of sheets comprises a hurdle ( 8 ), a movable separating and feeding head ( 1 ), a deflection mechanism ( 35 ), a resetting means ( 10 ) for the head ( 1 ), and means ( 31 ,  32 ,  36 ,  37 ,  26 ,  30 ,  23 ,  27 ,  28 ) provided for stopping, delaying or slowing down the head in the region of a separating distance (d v , d 2 -d 1 ) between the hurdle ( 8 ) and head ( 1 ).  
   
   
       2 . Sheet separating system according to  claim 1 , wherein the head ( 1 ) has an advancing means for a sheet, in particular in the form of a frictional roller ( 7 ) driven by a driving means ( 4 ,  5 ,  6 ).  
   
   
       3 . Sheet separating system according to  claim 1 , wherein the resetting means ( 10 ) is attached to the deflection mechanism ( 35 ).  
   
   
       4 . Sheet separating system according to  claim 1 , wherein the means ( 31 ,  32 ,  36 ,  37 ,  26 ,  30 ,  23 ,  27 ,  28 ) includes means for definitively or temporarily stopping, delaying or slowing down the head.  
   
   
       5 . Sheet separating system according to  claim 4 , wherein the means for bringing about definitive stopping comprises a stop which ends a deflection.  
   
   
       6 . Sheet separating system according to  claim 4 , wherein the means for bringing out temporary stopping or deceleration has a positioning means ( 27 ,  28 ) wherein the head ( 1 ) can be positioned independently of a drive means ( 4 ,  5 ,  6 ) when deflection relative to the hurdle ( 8 ) occurs.  
   
   
       7 . Sheet separating system according to  claim 4 , wherein the means for bringing about temporary deceleration comprises a one of a mechanical damper, a pneumatic damper, magnetic, electric, and electromagnetic damper, which impedes a deflection.  
   
   
       8 . Sheet separating system according to  claim 1 , wherein a controller ( 26 ) is provided which is operatively connected to the head ( 1 ) and/or the deflection mechanism ( 35 ).  
   
   
       9 . Sheet separating system according to  claim 4 , wherein the means for bringing about temporary slowing down comprises a drive means ( 7 ) which is actively slowed down by a controller ( 26 ) for deflecting the head ( 1 ).  
   
   
       10 . Sheet separating system according to  claim 1 , wherein a controller ( 26 ) is operatively connected to a sensor ( 23 ) for recording a distance between the hurdle ( 8 ) and head ( 1 ) and a movement of the uppermost sheet ( 13 ).  
   
   
       11 . Sheet separating system according to  claim 1 , wherein the head ( 1 ) is connected to the deflection mechanism ( 35 ) via a linkage ( 2 ).  
   
   
       12 . Sheet separating system according to  claim 1 , wherein the deflection mechanism ( 35 ) is arranged on an upper inner side ( 3 ) of a housing.  
   
   
       13 . Sheet separating system according to  claim 1 , wherein the deflection mechanism ( 35 ) and the head ( 1 ) are integrated into a unit.  
   
   
       14 . Sheet separating system according to  claim 13 , wherein the unit is secured to a lateral inner side of a housing and on the stack ( 14 ), by means of a suspension means.  
   
   
       15 . Sheet separating system according to  claim 13 , wherein the unit is held on an upper inner side ( 3 ) of a housing on the stack, by means of a suspension means.  
   
   
       16 . Sheet separating system according to  claim 15 , wherein the stack ( 14 ) is supported by a lifting base ( 20 ).  
   
   
       17 . Sheet handling system comprising a sheet separating system according to  claim 1 .  
   
   
       18 . Method for frictionally separating and feeding the uppermost sheet ( 13 ) from a stack ( 14 ) of sheets over a hurdle ( 8 ) having a sheet separating system according to  claim 1 , comprising the steps of deflecting the separating and feeding head ( 1 ) with respect to the resetting means ( 10 ) by means of the deflection mechanism ( 35 ) and which brings about sheet separation, and stopping, delaying or slowing down the deflection of the head ( 1 ) in the region of a separating distance (d v , d 2 -d 1 ) between the hurdle ( 8 ) and head ( 1 ).  
   
   
       19 . Method according to  claim 18 , wherein the deflection is stopped, delayed or slowed down definitively or temporarily.  
   
   
       20 . Method according to  claim 18 , wherein the deflection is stopped, delayed or slowed down between the head ( 1 ) and hurdle ( 8 ) by means of a damping element.  
   
   
       21 . Method according to  claim 20 , wherein damping in the region of the separating distance causes the head ( 1 ) to be firstly deflected at a constant speed and then deflected in an accelerated fashion again.  
   
   
       22 . Method according to  claim 18 , wherein the deflection with respect to the hurdle ( 8 ) is stopped, delayed or slowed down in a motor driven fashion.  
   
   
       23 . Method according to  claim 18 , wherein the deflection causes a distance between the hurdle ( 8 ) and head ( 1 ) to be increased successively under the control of a controller ( 26 ) if a paper movement sensor ( 22 ) does not detect any movement, or only an insufficient movement, of the uppermost sheet ( 13 ).  
   
   
       24 . Method according to  claim 18 , including feeding in sheet supply sequences wherein a first sheet supply sequence a distance from the hurdle ( 8 ) is increased until an acceptable ratio, stored for a controller ( 26 ), of the speed of the paper to the advancing speed of the head ( 1 ), is reached.