FR2477970A1 - METHOD AND INSTALLATION FOR CONTROLLING A PRINTING MACHINE - Google Patents

Abstract

A.PROCESS AND INSTALLATION FOR CONTROLLING A PRINTING MACHINE. B. SHEET 11 BROUGHT TO THE APPLICATION TABLE 2 OF THE MACHINE, AGAINST THE MARKS 10 OF THE APPLICATION LINE 3, BY AN APPLICATOR 1 EQUIPPED WITH A CONTROL 9 AND A CIRCUIT 12 WITH TWO ADJUSTING DEVICES OF PHASE 74, 78 IS CHECKED IN RELATION TO TWO SUCCESSIVE MEASUREMENT PULSES AND FOLLOWING THE RESULTS OF THIS CHECK, THE INTRODUCTION OF SHEET 11 INTO THE PRINTING MECHANISM 5 DRIVEN BY THE MOTOR 8 SPEED REGULATION BY THE DEVICE 7 IS AUTHORIZED OR PREVENTED BY DEVICE 5. C. THE INVENTION APPLIES IN PARTICULAR TO PRINTING MACHINES.

Description

1.-

  The invention relates to a method and an installation

  order to order a printing machine via

  leaves introduced into this machine.

  A control system is known to control the printing automatically and also to provide the control of introduction and application in the case of machines.

  to be printed using sheets (DE 2 202 851). This facility

  equipped with two measuring heads arranged on a line

  operates with three measuring moments, two of these three

  being affected only during the process of starting

  the printer to detect a pre-arrival

  matured or late leaf, while the control

  the operation of the machine is carried out in a single

  so much measure. The printing machine is immediately stopped by the installation when a sheet arrives prematurely, late, and when a sheet is crooked or

well misses.

  The disadvantage is the high expense of

  concerning the connection technique of the installation, its

  incident-generating plexity, and its lack of compatibility for the subsequent connection of additional installations

  for automatic control of sheet feed.

  Moreover, because of the immediate halt, the frequency

  quences during the intervention of leaves not cor-

rectes, is extremely high.

  The object of the invention is to increase the productivity

  of the printing machine by lowering the frequency of

  cuts when introducing leaves in the wrong position.

  while reducing the expense related to the technique of

connection.

  The invention therefore relates to a method and an installation for controlling the printing machine according to the circulation of the sheets with processes of

  repetition and / or additional processes to improve

improve productivity.

  For this purpose, it is planned, in accordance with

  that: - the sheet brought to the application line of the

  print, is controlled and control signals are ex-

  compared to two selected measurement pulses, -

  from a large number of pulses generated periodically

cally;

  - in the event of the detection of correct sheets, at the first

  the measurement pulse is blocked, and when the sheet starts moving, the sheet is released for insertion into the printing machine;

  - when the movement of the leaf starts and which is detected

  At the first pulse of measurement, the sheet feed is interrupted for one revolution and the second measurement pulse is blocked.

  ò if a correct sheet is detected at the first impulse

  measurement of the next revolution, the second

  measurement pulse is blocked and the sheet is released for its introduction into the printing machine, ò if a skewed sheet is detected at the first

  impulse of measurement of the next revolution, food

sheet is discontinued.

  - when the movement of the leaf begins and a lack of

  of leaves is observed during the first impulse of

  sure, a measurement is made during the second impulse and

  in case of detection of correct or crooked leaves, the

  leaf feeding is interrupted for a revolution

  and a measurement is made during the first impulse of

sure of the next revolution.

  - if a skewed sheet or a lack of leaves is detected

  the introduction of the sheet into the printing machine

  is prevented and the sheet feed is stopped.

  In case of detection of skewed leaves or a lack of leaves, after the introduction of the leaf

  in the printing machine was prevented and that the food

  sheet has been stopped, the printing machine is brought to a low rotational speed, a new measurement cycle is started, and in case of detection of sheets

  correct, the applicator is engaged.

  In addition: - the control signals are operated with a pulse of

  measure before the beginning of the period of arrival

  of the sheet and with a measuring impulse

  killing after the end of this period.

3.-

  - in the event of the presence of a leaf during the impulse of

  sure before the start of the arrival period.

  the premature arrival of the sheet is indicated 5. the signals of premature arrival of the sheets are integrated during several revolutions of the machine and in case of leaves arriving prematurely during several pulses of the machine, a delivery more late leaves are implemented, - in case a sheet comes to the measurement pulse after the end of the theoretical arrival period: the late arrival of the sheet is indicated the late arrival signals are integrated during

  several revolutions of the machine and in case of

  late flowering of leaves occur in the course of

  pulses of the machine, a more precocious deliverance

this leaves is implemented.

  According to another variant, the control signals

  the, referring to the measuring pulses generated periodically

  and covering the entire arrival area of the

  sheet, are operated by pulse counting up to the

  drive representing the arrival of the leaf, and in case of

  early or late, later release or more

  early leaf is implemented.

  In the case of the installation according to the invention,

  for the implementation of the process defined above, it is

  provided that, in a manner known per se, following an installation

  a measurement system clocked twice by a

  and controlled by a set of at least two control heads.

  arranged on an application rod, are connected to a

  installation connected to the entrance and exit with the installation

  timing, to prevent or allow the introduction of

  the leaf, and through a

  applicator application connected at the entrance and at the exit to the

  timing installation and installation for pocketing or

  authorize the introduction of the sheet, a circuit for

  while, moreover, between the rhythmic control of

  and the applicator circuit, is arranged a rotation circuit of the applicator, connected on the input side with the measuring installation and left outlet with the installation 4.- to prevent or allow the introduction of the sheet and with the applicator control, this circuit, at the beginning of the displacement of the sheet and for the signals of the installation

  measurement indicating a skewed sheet or a lack of

  the, ensuring once after the unfolding of a revolution of the machine, a new cycle and being connected to the installation

  to prevent or allow the introduction of the leaf.

  As a result of the installation to prevent or allow the introduction of the sheet, is connected

  a restart facility connected to the control of

  plier, and allowing a new engagement of the application

  tor and therefore a new beginning of movement of the sheet.

  The invention will be explained in more detail with reference to an exemplary embodiment shown in the accompanying drawings, in which: - Figure 1 shows schematically the printing machine, - Figure 2 shows the arrangement of the detection heads FIG. 3 is a FIG. 4 is a pulse diagram,

Block diagram of the

  FIG. 5 is an installation for preventing either of the sheet, FIG. 6 is an applicator circuit, FIG. 7 is an applicator control, diagram for allowing connection of the introduction of the connection diagram of the connection diagram of the installation of FIG. 8 is timing, a connection diagram of - the figure the measuring installation, - the rotation circuit figure - the figure the reset installation FIG. 9 is a schematic diagram of an applicator schematic, 11 is a schematic diagram, 12 is a schematic block diagram, and 13 is a schematic block diagram. connection of branch connection branch of 5.-

  the indication and operating installation Il.

  The process according to the invention is applied to a printing machine consisting of an applicator 1 for

  feeding the sheets comprising an application command

  9, an applicator circuit 12, an application table 2

  with two detection heads 4 arranged on a line of application

  3 for printing the sheets 11, one or more printing mechanisms 5, the first printing mechanism being equipped with an installation 6 to prevent or to prevent

  allow the sheet to be inserted into the printer.

  mLer and an evacuator, not shown. The drive of the machine is done by means of an electric motor 7, which is associated with an installation 8 for controlling the speed of rotation.

  By means of the applicator control 9, cir-

  When the applicator cooks 12, the sheet feed is started and the sheet 11 is fed to the application table 2 to the applicator 10 and to the application line 3. In the area of the application marks the sheets are

  Controlled by means of the detection heads 4.

  The detection heads 4 detect the missing leaves (no leaves), the leaves arriving prematurely, the leaves arriving late, the leaves presenting

  through and the leaves appearing correctly.

  The signals of the detection heads are exploited

  compared to two different measurement pulses (

res 3, 3.1).

  The first measurement pulse is delivered

  at the moment at which, at the latest, during the printing process,

  for maximum speed, authorization or

  the introduction of the sheet into the printing machine and the feeding of the sheets can still be

made correctly.

  The second measuring impulse which is only

  used for the exploitation of the signals of the heads of

  when the control of the first sheet is checked, is issued at the moment when an exact capture of the measurement value is possible. For this purpose, the sheet must be in the area

  application markers 10 on the table of application

  cation 2 (in this position, the introduction of

  in the printing machine is still stuck; in the posi-

  where the application benchmarks have been exceeded, an intro-

leaf production is possible).

  The measurement pulses are obtained from

  from a timing installation 13 delivering a plurality of

periodic pulses.

  If the detection heads 4 during the control of the first sheet (beginning of the movement of the sheets) deliver the signal "correct leaf" the second measurement pulse is blocked and the sheet is released for its introduction into

the printing machine.

  If the detection heads 4, during the check

  of the first leaf (beginning of leaf movement) de-

  deliver to the first measurement pulse the signal "leaf presenting crooked" the second measurement pulse is

  blocked and to prevent the leaf from being doubled, the food

  sheet is interrupted for a revolution. In the hypothesis that the leaf appearing crooked gets up

  of itself, a measure is still carried out at the first

  measuring pulse of the next revolution, If during the first measurement pulse of the

  following measurement cycle, it is found that the sheet is

  correctly, there is blockage of the second measurement pulse and release of the sheet for its introduction into

the printing machine.

  If it is found again that the leaflet

  it comes across (the sheet has not recovered),

  there is a stop of feeding the leaves.

  If during the check of the first sheet, during the first measurement pulse, the detection heads 4 deliver the signal "missing sheet" (no leaf present

  application marks) a measurement is made again

  calf during the second measurement pulse. If he presents himself

  then the signal "correct leaf" or "cross leaf" the-

  leaf feeding is interrupted for a revolution

  and during the first measurement pulse of the revolution following

  vante, a new measure is made. The process when measuring at the first measurement pulse of the revolution

  next is as described above.

  If it is always the signal "sheet 7.-

  missing "(the sheet has not yet reached the markers of ap-

  plication), there is also a new cycle of

during the next revolution.

  If the detection heads 4 deliver, during the operation of the machine (the first sheet being correctly inserted into the printing machine) during the first measurement pulse, the signals "cross-leaf" or "missing sheet", the introduction of the sheets into the printing machine is prevented and feeding of the sheets

stopped.

  As experience shows that the sheet after entering the measurement value is recovering itself, a

  retrying is attempted.

  Because of the discontinuation of leaf feeding and the prohibition of the introduction of the leaf into the

  printing machine, the printing machine is brought back from

  production rotational speed at a speed of rotation

  picking allowing the feeding of the leaves,

  a new cycle of measures is started and if the present

  the leaf is observed, feeding of

leaves is taken again.

  The course of the subsequent process is similar to the process flow when the first sheet is fed into the printing machine.

  The periodic impulses generated are

  used to identify and indicate leaves arriving prematurely and late and to influence the leaf feeding facility as a function of

  the moment when the sheet was issued.

  In this case, according to a first variant, the control signals of the measurement heads are operated with a

  measuring impulse before the beginning of the theo-

  arrival of the sheet and with a measurement pulse

  occurring after the end of this period (Figures 3, 3.2).

  When a sheet is present at the measuring pulse before the beginning of the arrival period

  Theoretical is that a leaf arrives prematurely. This article

  premature riveting is indicated and the premature arrival

  are integrated on several revolutions of the machine and

  where premature arrivals are present on more than one

  8, - if revolutions of the machine, a later issue

leaves are used.

  When a leaf is present during the impulse

  measurement after the end of the theoretical arrival period, there is late arrival of the sheet, this arrival

  is indicated, "missing leaf" signals are

  templated on several revolutions of the machine and when late arrivals appear on several revolutions of the machine, an earlier delivery of the leaves is put

implemented.

  According to a second variant, the con-

  control heads are operated with measurement pulses generated periodically and covering the entire

  the theoretical arrival period of the sheet (Figures 3, 3.3).

  This operation is then carried out by

  measurement pulses, taking into account the signals of the detection heads. The number of counting pulses up to the pulse representing the arrival of the sheet on the detection head is a measure of

  premature arrival, a correct arrival and a late arrival.

  If there is an early or late arrival

  if indicated and in the event of premature arrival, later leaf delivery is carried out, while in the case of late arrival, earlier

leaves is implemented.

  The installation for the implementation of the procedure

  FIG. 4 comprises a measuring installation 14 connected after the detection heads 4, which installation is connected at the input side with a timing installation 13. The output "missing sheet - cross-leaf" 14.1 of the installation of FIG. 14 is connected with an installation 6 to pocket or to release the introduction of the sheet, with a command

  applicator 12 and with a circuit for rotating the applica-

  plicant 15, while the output "cross leaf" 14.2

  is connected with the rotation circuit 15 of the applica-

  tor. The installation 6 to pocket or to release the

  The production of the sheet is also connected on the input side with the rotation circuit 15 of the applicator, and with the output 16.1 of the pulse production 16. The output 16.1 delivers a measurement pulse according to FIG. . Side 9.-

  exit, the installation 6 to pocket or to release the intro

  of the leaf, is connected with the treatment of 17

  pulses and the circuit 15 for rotating the applica-

  In addition, theories 6.1 and 6.2 of the installation 6 are connected with the installation 18 of restarting, while

  the output 6.2 is also connected with the command 12 of the application

  In addition, the start-up installation 18 is connected to the speed control 8 and the output side with the applicator control 12e. The applicator control 12 is connected to the circuit 15. of rotating the applicator and with the output 16.1 of the pulse output 16 and outputted with the control 9 of the applicator, the rotation circuit 15 of the applicator and the treatment 17 of the

pulses.

  The circuit 9 of the applicator is also

  linked by the connections already mentioned side enter with the circuit 15 of rotation of the applicateuro

  The circuit 15 for rotating the application

  It is connected with the output 16.1 of the pulse output 16 and with the pulse processing 17. The installation 6 for pocketing or releasing the introduction of the sheet (FIG. 5) comprises a first AND gate 26 and a second AND gate 27, these two gates being connected with the pulse output 16.1 of the pulse production 16 and with the output 14.1 "'missing sheet - cross-leaf" of the measuring installation 14, the connection with eette last exit taking place for the second AND gate 27

  in a negative way. Outputs of AND gates 26 and 27 are

  respectively connected to an input of a rocking stage 28. the output of the rocking stage 28 is connected with the circuit 15

  rotation of the applicator and with the treatment of im-

  puleions 17 and with a third AND gate 29 whose second negative input is connected to the output of the circuit 15 for rotating the applicator. The exit of the third

  door ET 29 is, on the one hand, directly connected with the

  tion 18, and, on the other hand, through the

  amplifier 30, with an electromagnet 31 for

  activate the installation 6 pocketing or authorizing the in-

  troduction of the leaves and finally, through a 10.-

  NOR gate 32 and a pulse shaping device.

  33, with the installation 18 of restarting and the com-

12 of the applicator.

  The pulse output 16.2 which delivers pulses according to FIG. 3, 3.2, is as well as the

  indication and exploitation and the exit of

  impulses 16.3 which delivers pulses in accordance with the

  3, 3.3, connected with the installation 20 of indication and ex-

  prosecuting. Care should be taken that installations 19 and 20 are used alternately. The

  indication and exploitation facilities 19 and 20 are also

  connected to the detection heads 4.

  The measuring installation 14 (FIG. 9) comprises

  two entry gates ET 21, whose entries are respectively

  consisting of a detection head 4 and an input from the timing installation 13. the doors

  ET input 21 are respectively connected to a floating stage

  22, the second entry of which is also constituted by

  an input from the timing installation 13.

  The outputs of the rocking stages 22 are

  respectively connected to an OR gate 23 and an indi-

  24, the OR gate 23.2 constituting the output 14.1 "

* the missing - cross-leaf "of the measuring installation, while the OR gate 23.1 has negative inputs and, through an AND gate 25, the outputs of the OR gates 23 constitute the output 14.2 "crooked sheet"

of the measuring installation 14.

  The restarting installation (FIG. 11) comprises a rocking stage 34, the first input of which is formed by the second output 6.2 of the installation 6 preventing

  or releasing the introduction of leaves, and the second of which

  The inputs of the OR gate 35 are constituted by the first output 6.1 of the installation 6 preventing or releasing the introduction of the sheets and by an open switch 36 when the gate

  bars 41 is open. This gate with bars 41 is

  on the table of application 2. For the removal of

  those which must not be introduced into the machine, the gate with bars 41 must be open, that is to say flipped

to the top.

he.

  The output of the rocking stage 34 is direct-

  connected with an indicator lamp 38 and through the

  area of a second AND gate 40 with command 12 of the application

  cator, while it is connected via a first AND gate 379 whose second input is constituted

  by the rotational speed control 8 (signal for a

  minimum rotation speed) and through a

  pulse shaping device 39 connected thereafter,

  with the second input of the second AND gate 40.

  The control 12 of the applicator (FIG. 7) comprises a first rocking stage 42 whose first input is constituted by a first OR gate 43 and whose second

  input is constituted by a second OR gate 44.

  The first input of the first OR gate 43 is constituted by the output of the restart installation 18 and its second input by a setting switch 45.

circuit of the applicator.

  The first input of the second OR gate 44 is constituted by a switch 46 for switching off the applicator and its second input is constituted by the second output 6,2 of the installation 6 to prevent or release the introduction of the leaves. The first release of the first

  tilting stage 42 is connected with the first input of a se-

  tilting stage 47 whose output is connected with the cir-

  9 of the applicator, the circuit 15 for rotating the

  the applicator and the treatment 17 of the pulses.

  The control 12 of the applicator further comprises a first AND gate 48 whose first input is constituted by the pulse output 16.1 of the output of the impulse 16, the second input of this AND gate 48 being constituted by the output 14.1 " missing leaf - leaf

  through the measuring installation 14, while its third

  The second input is constituted by the circuit 15 for rotating

applicator.

  The output of the first AND gate 48 is connected to the second AND gate 44 and to the input of a third gate

  OR 49. The second entry of the third OR gate 49 is

  the second output 6.2 of the installation 6 to prevent

  expensive or release the introduction of sheets, while its third input is constituted by the output of a second 12.- AND gate 50 connected after the tilting stage 42 and connected to the pulse output 16.1. The output of the third OR gate 49 is connected to the second entrance of the second stage

tilting 47.

  The circuit 9 of the applicator (FIG. 6) comprises an OR gate 51 whose inputs are constituted by the

  control 12 of the applicator and the circuit 15 for rotating

  applicator. 1 following the OR gate 51 are connected

  a NOR gate 52, an amplifier 53 and an electro-

  magnet 54 for switching on and off the application

er.

  The circuit 15 for rotating the application

  tor (FIG. 10) comprises a tilting stage 55 whose output

  is connected with the control 12 of the applicator and the installation

  6 to prevent or release the introduction of the leaves.

  The first input of the tilting stage 55 is constituted by a first OR gate 56 whose inputs

  are constituted by the control 12 of the applicator and the

  to prevent or release the introduction of

leaves.

  The second input of the tilting stage 55 is constituted by a second OR gate 57 at each of the inputs

  of which an AND gate 58, 59 is respectively connected.

  The first input of the first AND gate 58 is connected with the impulse processing 17, and the second input with a third OR gate 60. The first input of the second gate

  AND 59 is connected with the pulse output 16.1 of the output.

  16, the second input of the second AND gate 59 and the first input of the third OR gate 60 are

  connected with exit 14.2 "cross-leaf" and the ne-

  of the third OR gate 60 is connected with the output 14.1 "Missing leaf - cross leaf" * At the output of the second OR gate 57 is connected via a pulse shaping device

  61, the output terminating in the circuit 9 of the applicator.

  -The timing installation 13 (Figure 8)

  16. This generation of impulse

  pulses 16 delivers via the output 16.1 and the output 16.4 pulsed signals according to Figure 3, 3.1. Via output 16.2 it delivers

  pulsed signals in accordance with Figure 3, 3.2 and through

  mediated output 16.3 a pulsed signal in accordance with the

Figure 3, 3.3.

  In addition, the timing installation 13 com-

  carries a treatment of impulses 17. The treatment of impulses

  17 has an OR gate 62 whose output is connected to the

  Measuring station 14, whose inputs are connected to the outputs of AND gates 639, 64 placed upstream. The output of the second AND gate 64 is at the same time the green connection the circuit 15 for rotating the applicator, the first input of this same door is connected to the output 16.4 of the pulse output 16, the second negative input with the installation 6 to trap or release the introduction of the sheets and the third negative input is connected with the

  exit of a third AND gate 65.

  The first input of the first AND gate 63 is connected to the output 16.1 of the pulse output 16 and the second negative input of the same gate is connected to the output of the third AND gate 65. The first input of

  the third AND gate is connected with the command 12 of the

  and the negative input is connected with the installation 6 to prevent or release the introduction of the sheets, the installation of indication and expulsion 19 (Figure 12) comprises a first and a second organs ET 66,

  67, the first input of the first AND gate 66 being

  killed by the heads of detection 4, while the second

  is constituted by the pulse output 16.2 (start signal).

  The first input of the second AND gate 67 is constituted by the pulse output 16.2 (end signal) and the second negative pulse is constituted by the detection heads 40

  At the outputs of the AND gates 66, 67 are

  interconnected rocking stages 68, 69 and

  70, 71. Following each of the tilting stages 68, 69 is connected respectively an indicating device 72, 73, and following the integration members 70, 71 is connected

  a phase adjustment installation 74.

  The indication and operating facility (Figure 13) has an OR gate 75 whose inputs are

  constituted by the output 16.3 of the pulse processing 16.

  As a result of the OR gate 75 is connected an AND gate 76 of which 13.- 14.-

  the second input is constituted by the detection cells 4.

  At the output of the AND gate 76 is connected a shift register or counter 77 and an indication and / or adjustment facility

phase 78.

  The mode of operation of the assembly thus described is as follows

  By operating the turn-on switch 45

  of the applicator, the first rocking stage 42 and the second

  The tilting stage 47 of the applicator controller 12 is positioned and the electromagnet 54 is de-energized for the start-up of the applicator and thus the start of operation.

leaf feeding.

  The tilting stages 22.1, 22.2, 28 and 55 do not

are not yet positioned.

  By the treatment of pulses 17, the impulse

  Measuring points according to Figure 3, 3.1 are prepared.

  From there, different cases of functioning

  The following are examples: case 1 (correct introduction of the first sheet): the detection heads 4 detect a correct introduction, the tilting stages 22.1 and 22.2 are positioned, the indicator lamps 24.1 and 24.2 are extinguished, the stage

  tilting 28 is positioned via the se-

  door ET 27 of the installation 6. Through the

  re of the third AND gate 29, the electromagnet 31 is de-energized, i.e. the introduction of the

  sheet in the printing machine is released.

  case 2 (the first sheet at the first measurement pulse according to Fig. 3, 3.1 is detected as a skewed sheet): the tilting stage 22.1 or 22.2 is positioned, via the output gate ET 25 and the second AND gate 59, the tilting stage 55

  is positioned and the pulse shaping device

  sions 61 is activated thanks to which the electromagnet 54 is

  4xcité for a short time. So, the application

  is stopped for a running time. In this way, there can be no duplicate

on the installation.

  From there, a new measure of the posi-

  the leaf is made during the first e-

  measurement of the second work cycle.

  case 2.1 (in the meantime the sheet has recovered): a measure

  is performed at the first measurement pulse of the se-

  work cycle of the machine. The output of the OR gate 23.2 delivers a signal L and through

  door ET 27 the tilting stage 28 is position-

  born. Via the OR gate 57

  resetting of the rocking stage 55 and by the in-

  AND 29 a switch releasing the installation, that is to say, releasing the introduction

  sheets in the printing machine.

  By positioning the rocking stage 28, the second measurement pulse (according to FIG. 3, 3.1) is blocked for the other measurement via the gate

AND 64.

  case 2.2 (the sheet has not recovered, that is to say, it continues to be crooked) o a measure is

  performed at the first measurement rate of the second cy-

  working key. The tilting stage 55 being positioned, the resetting of the rocking stage 47 is carried out via the AND gate 48 and the OR gate 49,

  and it follows the final stop of the applicator.

  case 3: during the first measurement pulse, a

  missing leaf. A measurement is made in the second

  measuring pulse. Independently of the fact that at the second measuring pulse a correct position or

  if a cross position is detected, the low floor

  55 is positioned and the pulse shaping device 61 is actuated via

  the OR gate 60, the AND gate 58 and the OR gate 57.

  Therefore, to avoid duplicate sheets, the applicator is cut for a work cycle. A new measurement is made by the first measurement pulse of the next work cycle. Depending on the result of this measurement, (correct position or crosswise position) the rest of the process proceeds as previously described, case 4 (displacement of the sheet): the first sheet is treated correspondingly to case 1, c that is, the tilting stages 22.1 and 22.2 are positioned and the magnet 31 is de-energized, whereby the insertion of the sheet into the printing machine is

  released. At the same time, the second measurement pulse is

  that is, only the first measurement pulse

  is applied to the measuring installation 14.

  During the displacement of the leaves (succession of leaves after the first leaf) a cross-leaf or a missing leaf appears during the first measurement pulse. As a result, the tilting stage 28 is delivered

  and installation 6 to prevent or release the introduc-

  The sheets are blocked, that is to say that the introduction of the sheet into the printing machine is pocketed. To pocket double sheets an impulse is generated

  with the positioning of the rocking stage 28 in the arrangement

  impulse shaping 33, this impulse bringing to zero the tilting stages 42 and 47 and thus putting out

circuit the applicator.

  Due to the interruption of the movement of

  leaves, the machine returns to its lower rotational speed.

  The impulse of the pulse shaping device 33 also positions the rocking stage 34 whereby the indicator lamp 30 lights up and thus indicates that the machine is not yet completely switched off. Yes

  the machine is operated at a rotational speed

  In order to enable the applicator to be put back into operation, the pulse-shaping device 39 is excited.

  through the first AND gate 37 and thus the

  pliquer is again put into operation.

  From there, a new measurement is made

  killed during the first measurement pulse of the training cycle.

  next day. Depending on the result of this measurement, the subsequent signal processing is performed as described in

the framework of cases 2.1 or 2.2.

17.- R E V E N D i C A T I 0 N S

  1.- Method for controlling a printer machine

  sea through the sheets entering this printing machine, characterized in that the sheet fed to the application line of the

  primer, is controlled and the control signals are ex-

  compared to two selected measurement pulses

  from a large number of pulses generated periodically

  - in the event of detection of correct sheets, during the first measurement pulse, the second measurement pulse is blocked and when the movement of the sheet starts, the sheet is released for insertion into the printing machine,

  - when the leaf starts to move and is detected

  oblique sheets during the first measurement pulse, the sheet feed is interrupted for one revolution and the second measurement pulse is blocked

  if a correct feb is detected at the first impulse

  measurement of the next revolution, the second pulse of measurement is blocked and the sheet is released for its introduction into the printing machine, if a skewed sheet is detected at the first

  impulse of measurement of the next revolution, the food

sheet is discontinued.

  - when the movement of the leaf begins and a lack of

  of leaves is observed during the first impulse of

  sure, a measurement is made during the second impulse and

  in case of detection of correct or crooked leaves, the

  leaf feeding is interrupted for a revolution

  and a measurement is made during the first impulse of

sure of the next revolution.

  - If a skewed sheet or a lack of leaves is detected

  the introduction of the sheet into the printing machine

  is potted and the leaf feed is stopped.

  2. A process according to claim 1, characterized

  rised in that, in the case of detection of skewed leaves or a lack of leaves, after the introduction of the leaf

  the printing machine was pocketed and that the food

  If the sheet is stopped, the printing machine is brought to a low rotational speed, a new measuring cycle is started, and in case of detection of sheets

  correct, the applicator is engaged.

  3. A process according to claim 1, characterized

  rised in that: - the control signals are operated with a pulse of

  measure before the beginning of the period of arrival

  of the sheet and with a measuring impulse

  killing after the end of this period.

  - if a sheet is present during the measurement pulse

  before the start of the theoretical arrival period.

  that: the premature arrival of the sheet is indicated the signals of premature arrival of the sheets are integrated during several revolutions of the machine and in case of sheets arriving prematurely during several pulses of the machine, a later delivery of the

leaves is implemented.

  - in the case where a sheet is presented to the measuring pulse after the end of the theoretical arrival period: the late arrival of the sheet is indicated the late arrival signals are integrated in the course of

  several revolutions of the machine and in the case where

  late flowering of leaves occur in the course of

  machine pulses, earlier delivery

leaves are used.

  4. Process according to claim 1, characterized

  in that the control signals, referring to the measurement pulses generated periodically and covering the entire area of arrival of the sheet, are operated by counting the pulses up to the pulse representing the arrival of the leaf, and in case of early or late arrival a later or earlier delivery of leaves

is implemented.

  5.- Installation for the implementation of the pro-

  assigned according to claim 1, characterized in that, in a manner known per se, following an installation

  measuring device (14) clocked twice by an installation of

  dente (13) and controlled by a set of at least two t -

  detection probes (4) arranged on an application line (3), 19.- are connected to an installation (6), connected at the input-and-output side with the timing device (13), to prevent or to allow the introduction of the sheet, as well as via an applicator control (12) connected to the inlet and outlet side to the timing device (13) and

  at the installation (6) to entrap or authorize the intro-

  an applicator circuit (9) while a clock circuit (15) is arranged between the clocked applicator control (12) and the applicator circuit (9).

  rotation of the applicator, connected at the entrance with the installation

  measurement (14) and outlet with the installation (6) for pocketing or allowing the introduction of the sheet and with the applicator control (12), this circuit (15), at the beginning of the movement of the the sheet and for the measuring system signals indicating a skewed sheet or a lack of sheets, ensuring once after the unfolding of a revolution of the machine, a new cycle and being connected

  at installation (6) to prevent or authorize the introduction

leaf.

  6. Installation according to claim 5,

  characterized in that, after the installation (6) for pocketing or allowing the introduction of the sheet, is connected a restarting installation (18), connected to

  the applicator control (12), and allowing a new engagement

  the applicator and thus a new beginning of

sheet.