referring now to the drawings and , first , particularly to fig1 thereof , there is shown therein an auxiliary pile carrier or support 1 together with a displacement - velocity plot diagram 11 , wherein the velocity curve 14 of the auxiliary pile carrier 1 is represented . the auxiliary pile carrier 1 is shown diagrammatically and may be formed as a plate , a rake or have any other suitable construction . a linear unit 15 promotes the horizontal displaceability of the auxiliary pile carrier 1 , and a drive shaft 16 is connected to a drive system which permits high acceleration and brief braking . before the insertion of the auxiliary pile carrier 1 begins , it is located with the leading edge thereof at the level of the line 19 shown in phantom which marks the rest position of the withdrawn auxiliary pile carrier 1 . as the velocity curve 14 shows , the auxiliary pile carrier 1 is sharply accelerated before the insertion thereof , in fact , in such a manner that it reaches the position 6 shown in phantom at the end of the main pile 2 facing towards the press , i . e ., towards the left - hand side of fig1 simultaneously with a sheet 3 ( note fig2 ) which is to be deposited . the auxiliary pile carrier 1 begins its acceleration , therefore , with a leap forward with respect to the sheet 3 which is to be deposited . the auxiliary pile carrier 1 then travels over the main pile 2 synchronously with the sheet 3 to be deposited , being braked simultaneously with the sheet 3 at a position 7 shown in phantom , so as to come to a stop at an end 8 of the main pile 2 facing away from the press . the displacement - velocity diagram 11 shows the velocity 13 of the auxiliary pile carrier 1 over the aforedescribed path 12 . fig2 and 3 show a diagrammatically represented sheet delivery 10 , in fig2 of which the auxiliary pile carrier 1 is in the rest position 19 thereof . fig3 shows the auxiliary pile carrier 1 as it is being inserted . fig2 shows the auxiliary pile carrier 1 in the rest position 19 thereof and , thereover , a gripper 9 of the sheet delivery 10 which transports a sheet 3 in the sheet travel direction 4 so as to deposit it on the main pile 2 . because the main pile 2 , however , is supposed to be removed , the auxiliary pile carrier 1 must be inserted . the auxiliary pile carrier 1 , in the illustrated position 19 thereof , has leaped forward in front of the sheet 3 and is accelerated until it reaches the position 6 thereof at the end 5 of the main pile 2 facing towards the press , in such a manner that it , with the leading edge thereof , comes on simultaneously with the leading edge of the sheet 3 and also with the same speed as that of the sheet 3 . from the position 6 thereof , the auxiliary pile carrier 1 and the sheet 3 are displaced synchronously over the main pile 2 , until they reach the position 7 thereof , wherein braking begins . this press position is illustrated in fig3 . in the position 7 , a sheet brake 18 , which is is formed as a suction roller , for example , is activated and brakes or decelerates the sheet 3 . initially , the grippers 9 of the sheet delivery 10 open , and the auxiliary pile carrier 1 is braked to the same extent as the sheet 3 . the auxiliary pile carrier 1 and the sheet 3 continue to move until they reach the end 8 of main pile 2 facing away from the press , and the sheet 3 impacting with a stop 17 deposits on the auxiliary pile carrier 1 . the main pile 2 can then be removed , because all of the succeeding sheets deposit on the auxiliary pile carrier 1 . after the main pile 2 has been removed , the auxiliary pile carrier 1 can be extended again so that the the sheets 3 can deposit on a pallet of the main pile 2 , or the auxiliary pile carrier 1 remains and accepts the new main pile 2 thereon . for such a case , the auxiliary pile carrier 1 must be separated from the linear unit 15 and the drive 16 and a new auxiliary pile carrier 1 must be made available , if a main pile 2 should again be removed . in fig2 and 3 , a chain strand 28 is represented in phantom , which is followed by the grippers 9 mounted on gripper bars . the sheet brake 18 has a brake surface 29 which , on the one hand , can be formed on a suction roller casing subjected to negative pressure and , on the other hand , can also be a revolving brake surface formed on a belt . in fig3 there is also shown a gripper opening cam 20 . 1 which is adjustable about a pivot point 20 . 2 of a servomotor 20 ( note fig6 ), so that a roller 30 of the respectively present gripper 9 comes into contact with a first section of a contour 20 . 3 of the gripper opening cam 20 . 1 which is of conventional construction for a conventional main pile delivery . on the other hand , the gripper opening cam 20 . 1 can also be pivoted in a manner that the sheets 3 to be deposited are fed to a proof or specimen sheet removal device , at which a second section of the contour 20 . 3 of the gripper opening cam 20 . 1 then activates the rollers 30 of the grippers 9 . fig4 and 5 show the auxiliary pile carrier 1 which is guided on linear units 15 . the sheet delivery 10 includes the auxiliary pile carrier 1 displaceably mounted on linear units 15 . the auxiliary pile carrier 1 is displaced in a horizontal direction by a separate drive 16a which acts upon a belt 26 guided about a return roller 27 ; in an analogous manner , the opposite linear unit 15 is driven by the drive shaft 16 . the linear units 15 can be provided at a leading and a trailing region thereof , respectively , with a preceding and succeeding traverse distance or length , respectively , so as to minimize the loadings for the the drive 16a . by means of a terminal switch 21 , the auxiliary pile carrier 1 can automatically switch off the motor drive 16a when the auxiliary pile carrier 1 has reached the end position thereof ( note fig5 ). in the operating phase represented in fig5 the auxiliary pile carrier 1 , in the extended condition thereof , overlaps the side 5 of the main sheet pile 2 facing towards the press as well as the side 8 thereof facing away from the press . fig6 shows a control device 24 by which the drives 18a and 20 , respectively , for the brake surface 29 and the swivelling of the gripper opening cam 20 . 1 , as well as a drive 16a for the auxiliary pile carrier 1 , are coordinated in accordance with the determination of actual data for the printing press . the detector or evaluator of the actual values or data in the press which is represented at 25 receives , for example , the then value of the printing - press rotational angle 25 . 2 from a transmitter . before the start of the printing job , the sheet format 25 . 3 is input into the feeder and delivery and is therefore already available as a parameter . the press speed 25 . 1 is continuously measured and is likewise available to the control device 24 as a parameter . nominal or ideal prescribed values for the adjustment of the gripper opening cam 20 . 1 , the brake surface velocity and the insertion velocity of the auxiliary pile carrier 1 over the main sheet pile 2 for specific printing speeds and sheet formats are filed in a nominal or ideal value memory or storage of the control device 24 . in order to enable a simultaneous inwardly driven movement of the auxiliary pile carrier 1 and the sheet leading edge 3 , the angular position 25 . 2 of the printing press must also be known . therefore , information regarding the actual angular position of the printing press is necessary . the respective actual data of the drives 16a , 18a and 20 , respectively , must be transmitted therefrom to the control device 24 . with respect to the drive 16a for the auxiliary pile carrier 1 , those data are the actual positions of the auxiliary pile carrier 1 and , with respect to the drives 18a and 20 , the data are the actual brake surface velocity and the actual position of the gripper opening cam 20 . 1 , respectively . the actual position and velocity values , respectively , for the drives 16a , 18a and 20 are transmitted to the control device 24 , and are therefore available thereat for a reconciliation or adjustment of the nominal / actual data . depending upon the press speed and the sheet format , such as the length , for example , of the sheet 3 to be deposited , the braking velocity of the brake surface 29 must be pre - adjusted to an optimum delay value , i . e ., a prescribed nominal value must result , which leads to achieving the desired deposition velocity of the sheet 3 which is to be deposited . in order to enable a simultaneous displacement of the leading edge of the auxiliary pile carrier 1 and of the sheet 3 to be deposited , which remains held in the grippers 9 , the drive 16a , in order to extend the auxiliary pile carrier 1 , must be controlled so that the velocity at which the auxiliary pile carrier 1 is extended coincides with the velocity of displacement of the sheet 3 to be deposited , so that a deposition can occur which is free of relative velocity . the extension of the auxiliary pile carrier 1 must take place upon the arrival of the leading edge of the sheet 3 to be deposited . in addition , the start of the extension of the auxiliary pile carrier 1 must be reconciled with or adjusted to the phase position of the printing press , for which , therefore , the actual value of the press angle 25 . 2 is determined . it is also necessary to match the position of the gripper opening cam 20 . 1 with respect to a swivel point 20 . 2 to every sheet format 25 . 1 . also , the fact that a large sheet has a different deposit or dropping behavior onto the main sheet pile 2 than that of a small sheet is taken into account by the position of the gripper opening cam 20 . 1 . the weight of the printing material of the sheet 3 to be deposited also affects the dropping behavior of the sheet 3 to be deposited upon the surface of the main sheet pile 2 . thus , for every type of printing material , respectively , depending upon the format or size 25 . 1 of the sheet , an optimum instant of gripper opening is determined which , depending upon the sheet format 25 . 1 and weight of the sheet 3 to be deposited , must be preset in order to attain an optimum delivery and delay behavior . assurance must further be provided that the brake surface 29 takes over the sheet 3 to be deposited without any relative velocity , so that the underside of the sheet 3 is not smeared . the respectively prescribed velocity of the brake surface 29 is dependent upon the velocity at which the sheet 3 to be deposited is conveyed , and the start of the braking operation depends upon the opening of the gripper 9 and , therewith , upon the position of the gripper opening cam 20 . 1 , as well as of the press angle 25 . 2 . the drive 16a is switchable off by a terminal switch 21 after the auxiliary pile carrier 1 has reached the extended position thereof above the main pile 2 . by means of a non - stop key 22 , the printing press can be stopped at the sheet delivery 10 whereas , by means of a non - stop key 23 , the pile separating operation at the auxiliary and the main sheet piles is initiated . the non - stop key 23 issues the starting signal for the performance of the aforedescribed steps of the method according to the invention . the displacement profile ( note fig1 ), which the drive 18a of the brake surface 29 follows in accordance with or dependent upon parameters of the press and the printing material , corresponds to the velocity of the gripper 9 up to the instant of time represented by the phantom line 7 . thereafter , a delay or retardation period is traversed until the desired deposition velocity is reached . instead of an abruptly dropping delay flank or leg , a gradually falling delay flank declination can also be prescribed .