Device and process for delivery of pieces of flat material cut out of a web

Abstract

A device for delivering pieces of flat material, which are cut out of a web, into delivery containers is described. This device is to be so improved upon that full delivery containers can be replaced by empty delivery containers, without having to interrupt the delivery process. In order to achieve this, it is proposed to provide at least a first and a section suction roll, which is driven by way of rotation and can be applies with vacuum to retain the pieces of flat material in the peripheral area of said rolls, and at least a first and a second delivery container for delivering the pieces of flat material, in which the vacuum application can be so controlled by means of a vacuum controlling device that the pieces of flat material alternatively can be fed either to the first or the second delivery container.

What is claimed is:  
     
         1 . A device for delivery of pieces of flat material (E) cut out of a web ( 4 ), characterized in that at least a first and a second suction roll ( 21 ,  22 ), which are driven by way of rotation and can be applied with vacuum to retain the pieces of flat material (E) at the peripheral areas of said rolls, as well as at least a first and a second delivery container ( 31 ,  32 ) are provided for delivering the pieces of flat material (E), in which the application of vacuum is so controllable by means of a vacuum controlling device that the pieces of flat material (E) alternatively can be fed to the first delivery container ( 31 ) or the second delivery container ( 32 ).  
     
     
         2 . A device as defined in  claim 1 , characterized in that a third suction roll ( 23 ) is provided, which accepts the pieces of flat material (E) from the first or second suction roll ( 21 ,  22 ), so that the first and the second delivery container ( 31 ,  32 ) can be aligned in the same spatial direction.  
     
     
         3 . A device as defined in  claim 1  or  2 , characterized in that a first conveyor ( 5 ) is provided which feeds the pieces of flat material (E), which are allocated to a first row of blanks (N 1 ), for delivery into the first or second delivery container ( 31 ,  32 ).  
     
     
         4 . A device as defined in  claim 3 , characterized in that a second conveyor ( 5 ) is provided which, in relation to the first conveyor ( 5 ), is set off in reverse order in the axial direction of the suction rolls ( 21 ,  22 ) and feeds the pieces of flat material (E) allocated to a second row of blanks (N 2 ) to the suction rolls ( 21 ,  22 ) for delivery into a third or fourth delivery container ( 33 ,  34 ).  
     
     
         5 . A device as defined in  claim 3 , characterized in that the first suction roll ( 21 ) is a component of the first conveyor ( 5 ).  
     
     
         6 . A device as defined in  claim 4 , characterized in that the first suction roll ( 21 ) is a component of the first and second conveyor ( 5 ,  6 ).  
     
     
         7 . A device as defined in  claim 4  or  6 , characterized in that the first conveyor ( 6 ) is placed in a second level, in which the first level is on top of the second level.  
     
     
         8 . A device as defined in  claim 7 , characterized in that the first level runs parallel to the second level.  
     
     
         9 . A device as defined in  claim 7 , characterized in that the first level intersects the second level.  
     
     
         10 . A device as defined in  claim 7  through  9 , characterized in that a fourth ( 24 ), fifth ( 25 ) and sixth ( 26 ) suction roll are provided, in which the vacuum application of the suction rolls ( 21 ,  22 ,  23 ,  24 ,  25 ,  26 ) is so controllable that the pieces of flat material (E), which are fed from the first conveyor ( 5 ), either can be fed via the second ( 22 ) and third ( 23 ) suction roll of the first delivery container ( 31 ) or via the first ( 21 ), fourth ( 24 ), and fifth ( 25 ) suction roll of the second delivery container ( 32 ), and the pieces of flat material (E), which are fed from the second conveyor ( 6 ) either can be fed via the sixth ( 26 ) and fifth ( 25 ) suction roll of the third delivery container ( 33 ) or via the sixth ( 26 ), fifth ( 25 ), fourth ( 24 ) and third ( 23 ) suction roll of the fourth delivery container ( 34 ).  
     
     
         11 . A device as defined in one of the claims  7  through  9 , characterized in that a fourth ( 25 ) and fifth ( 26 ) suction roll are provided, in which the vacuum application of the suction rolls ( 21 ,  24 ,  23 ,  25 ,  26 ) is so controllable that the pieces of flat material (E), which are fed from the first conveyor ( 5 ), either can be fed via the first ( 21 ), second ( 24 ) and third ( 23 ) suction roll of the first delivery container ( 31 ) or via the first ( 21 ), second ( 24 ) and fourth ( 25 ) suction roll of the second delivery container ( 32 ), and the pieces of flat material (E), which are fed from the second conveyor ( 6 ) either can be fed via the fifth ( 26 ) and fourth ( 25 ) suction roll of the third delivery container ( 33 ) or via the fifth ( 26 ), fourth ( 25 ), second ( 24 ) and third ( 23 ) suction roll of the fourth delivery container ( 34 ).  
     
     
         12 . A device as defined in one of the  claim 4  or one of the claims  6  through  11 , characterized in that the first and second delivery container ( 31 ,  32 ), as well as the fourth and third delivery container ( 34 ,  33 ) essentially are placed on top of each other.  
     
     
         13 . A device as defined in one of the  claim 4  or one of the claims  6  through  16 , characterized in that the first and fourth delivery container ( 31 ,  34 ), as well as the second and third delivery container ( 32 ,  33 ) essentially are placed on adjacent to each other.  
     
     
         14 . A machine for producing pieces of flat material (E) cut out of a web ( 4 ), comprising a device for delivering the pieces of flat material (E)  
     
     
         15 . A process for delivering pieces of flat material (E) cut out of a web ( 4 ), characterized by the following steps: 
 Conveyance of the pieces of flat material (E) to at least a first and a second suction roll ( 21 ,  22 ) which is driven by way of rotation and to which vacuum can be applied to retain the pieces of flat material (E) at the peripheral area of said roll, and    controlling the vacuum application of the suction rolls ( 21 ,  22 ) in such a manner that the pieces of flat material (E) alternatively are fed to a first delivery container ( 31 ) or a second delivery container ( 32 ).    
     
     
         16 . A process as defined in  claim 15 , characterized in that the conveyance of the pieces of flat material (E) to the suction rollers ( 21 ,  22 ) is per formed by means of at least two conveyors ( 5 ,  6 ), in which the first conveyor ( 5 ) conveys the pieces of flat material (E) which are allocated to a first row of blanks (N 1 ) and are designated for delivery into a first delivery container ( 31 ) or a second delivery container ( 32 ), and the second conveyor ( 6 ) conveys the pieces of flat material (E) which are allocated to a second row of blanks (N 2 ) and are designated for delivery into a third delivery container ( 33 ) or a fourth delivery container ( 34 ).  
     
     
         17 . A process as defined in  claim 16 , characterized in that the delivery of the pieces of flat material (E) in the first delivery container ( 31 ) and in the third delivery container ( 33 ) on the one hand and/or the delivery of the pieces of flat material (E) in the second delivery container ( 32 ) and the fourth delivery container ( 34 ) on the other hand is performed simultaneously, in which the first and the second delivery container ( 31 ,  32 ), as well as the fourth and the third delivery container ( 34 ,  33 ) essentially are placed on top of each other, and in which the first and the fourth delivery container ( 31 ,  34 ), as well as the second and the third container ( 32 ,  33 ) essentially are placed adjacent to each other.  
     
     
         18 . A process as defined in  claim 16 , characterized in that the delivery of the pieces of flat material (E) in the first delivery container ( 31 ) and the third delivery container ( 33 ) on the one hand and/or the delivery of the pieces of flat material (E) in the second delivery container ( 32 ) and the fourth delivery container ( 33 ) on the other hand is performed simultaneously, in which the first and the second delivery container ( 31 ,  32 ), as well as the fourth and the third delivery container ( 34 ,  33 ) essentially are placed on top of each other, and in which the first and the fourth delivery container ( 31 ,  34 ), as well as the second and the third delivery container ( 32 ,  33 ) essentially are placed adjacent to each other.  
     
     
         19 . A process as defined in claims  15  through  18 , characterized in that said process is performed in a machine which producers the pieces of flat material (E).