Device and method for depositing sheet-shaped substrates so as to form a stack

Abstract

The present invention relates to a device and a method for depositing sheet-shaped substrates ( 6 ), in particular printing materials, in a printing machine so as to form a stack. The device comprises a tray ( 10 ) for receiving the substrates, said tray having a tray surface ( 8 ) that is tilted about a first axis and about a second axis, relative to a horizontal. Also provided are a lifting device for lifting and lowering the tray, as well as a first abutment ( 25 ) having a first abutment surface and a second abutment ( 26 ) having a second abutment surface, with the first and the second abutment surfaces being arranged so as to be perpendicular to each other, and with substrates deposited on the tray coming to abut against the first and the second abutment surfaces due to the tilting of the tray surface.

1 . Device for depositing sheet-shaped substrates, in particular printing materials, in a printing machine so as to form a stack, the device comprising the following:
 a tray for receiving the substrates, the tray having a tray surface that is tilted about a first axis and about a second axis, relative to a horizontal;   a lifting device for lifting and lowering the tray;   a first abutment having a first abutment surface;   a second abutment having a second abutment surface, with the first and the second abutment surfaces being arranged so as to be perpendicular to each other, and with substrates deposited on the tray coming to abut against the first and the second abutment surfaces due to the tilting of the tray surface; and   a gas supply unit having a gas outlet opening that is directed at the lowest point of a depositing plane for the substrates.   
     
     
         2 . The device according to  claim 1 , wherein the first axis is parallel to a printing material transport axis, and the second axis extends perpendicularly to the first axis and is in a plane parallel to the tray surface. 
     
     
         3 . (canceled) 
     
     
         4 . The device according to  claim 1 , wherein the gas outlet opening is arranged at the height of the depositing plane for the substrates. 
     
     
         5 . The device according to  claim 1 , wherein that the gas outlet opening is directed at a region between the first and the second abutment surfaces. 
     
     
         6 . The device according to  claim 1 , wherein the gas supply unit includes a gas nozzle. 
     
     
         7 . The device according to  claim 1 , wherein the gas supply unit includes a blower. 
     
     
         8 . The device according to  claim 1 , wherein the second abutment is arranged perpendicular to the tray surface. 
     
     
         9 . The device according to  claim 1 , wherein the second abutment is vertically arranged. 
     
     
         10 . The device according to  claim 1 , wherein the second abutment is fastened to the tray. 
     
     
         11 . The device according to  claim 1 , wherein the second abutment is adjustable. 
     
     
         12 . (canceled) 
     
     
         13 . The device according to  claim 11 , further including a setting wheel useful for adjusting the second abutment. 
     
     
         14 . The device according to  claim 1 , wherein the second abutment includes as passage openings. 
     
     
         15 . The device according to  claim 1 , wherein the second abutment is configured as a wire bracket. 
     
     
         16 . (canceled) 
     
     
         17 . The device according to  claim 1 , wherein the first abutment is part of a depositing member that deposits the substrates on the tray. 
     
     
         18 . The device according to  claim 1 , wherein the first abutment is inclined to form a right angle with an adjacent region of the tray surface. 
     
     
         19 . The device according to  claim 18 , wherein the lifting device lifts and lowers the tray parallel to the first abutment surface. 
     
     
         20 . The device according to  claim 1 , wherein the tray surface includes a first and a second depositing region, the regions being each tilted differently from the horizontal about the second axis. 
     
     
         21 . Method for depositing sheet-shaped substrate in a printing machine so as to form a stack, the method comprising:
 conveying the sheet-shaped substrates to a substrate support comprising a tray, and a first and a second abutment, the tray being rotated about a first axis that is parallel to a substrate transport axis and about a second axis that is in a tray plane and perpendicular to the first axis, and the first and second abutments include abutment surfaces that are perpendicular with respect to each other;   generating a gas stream under a respective substrate that is being conveyed onto the tray, the gas stream being directed at a region between the first and the second abutments; and   lowering the tray.   
     
     
         22 . The method according to  claim 21 , wherein the sheet-shaped substrate is transported against the abutments due to the tilt and the gas stream. 
     
     
         23 . The method according to  claim 22 , wherein the tray is lowered parallel to the second abutment surface. 
     
     
         24 . The method according to  claim 21 , wherein the second abutment is arranged so as to be perpendicular to the tray surface. 
     
     
         25 . The method according to  claim 21 , wherein the second abutment is vertically arranged. 
     
     
         26 . The method according to  claim 21 , wherein the first abutment is inclined to form a right angle with an adjacent region of the tray surface. 
     
     
         27 . The method according to  claim 26 , wherein the tray is lowered parallel to the abutment surface of the first abutment.