US1921340A - Guiding device for sheet working printing presses - Google Patents

Description

N. BECKER Aug. 8, 1933.

GUIDING DEVICE FOR SHEET WORKING PRINTING PRESSES Filed Feb. 24, 1951 3 Sheets-Sheet l j 12 van tor jVi/folzzs Bee/fer N. BECKER Aug. 8, 1933.

GUIDING DEVICE FOR SHEET WORKING PRINTING PRESSES Filed Feb. 24, 1951 5 Sheets-Sheet 2 [lire/2501' WW jftazney.

Aug. 8, 1933. v N. BECKER 1,921,340

GUIDING DEVICE FOR SHEET WORKING PRINTING PRESSES Filed Feb. 24, 1931 3 Sheets-Sheet 3 Izzrezzfor:

Patented Aug. 8, 1933 I UNITED STATES GUIDING DEVICE FOR SHEET WORKING PRINTING PRESSES Nikolaus Becker, Durlach near Karlsruhe, Germany, assignorto Schnellpressenfabrik Aktiengesellschaft Heidelberg, Heidelberg, Germany Application February 24, 1931, Serial No. 517,946, and in Germany February 25, 1930 Claims. '(Cl. 101272) This invention relates, to steering means for sheet working cylinder printing presses.

With printing presses of this kind one has used heretofore for the engaging and disengaging of the driving gear of the printing press, for the interruption and reengaging of the sheet-feeding as well as for the starting and stopping of the printing process separate levers, which besides were so arranged, that they could not be attended of the cylinder, by which action considerable work and a greater loss of time were created.

7 These very important disadvantages shall be done away with by the present invention and a guiding device for sheet working printing presses shall be constructed, which permits an attendance of the printing press from one andthe same stand and by means of which the single working processes can be engaged and disengaged in positive succession, so that on the one hand at the engaging a false succession in the work of the single engaging mechanism or the surpassing of a a working process is made impossible, and on the other hand at thestopping of the printing press the different working processes are indeed disengaged. p

The new feature therefore lies'essentially in vthe compulsion of action at the starting and stopping of the printing press from one and the same stand.

According to the invention the means'to engage and disengage the printing press, to start and stop the paper-feeding, to start and stop the printing and so on are united in one place and coupled in such a manner, that the single working processes can be compulsory engaged and disengaged in the corresponding succession. To vatttain this purpose one singlelever can be used. It is of good purpose that on each side of the printing press one switch lever is arranged; which both are fastened on a common shaft and which permit the engaging and disengaging of various working processes either side of the printing press.

According to the invention it is possible to undertake the disengaging of the single working processes one after the other by hand as well as by a mechanism, which enters into efiect by I switch off the driving from the shaft 7 and by faulty sheet-feeding, as will be shown in 'the hereafter set forth description of the invention. In the accompanying drawings according to this invention an arrangement is illustrated by way of example in constructional form at the use with a cylinder press with oppositely moved printing means, in which the type foundation can be raised and lowered.

Fig. l is a View seen from the driving side.

Fig. 2 a View seen from the manipulating side of the press.

Fig. 3 shows the switch lever according to Fig. 2 in the position in which the machine is set idle. V

The switch levers. 2 and 3 pinned on to the shaft I bear in the base frame 1 on both sides of the machine and their effect in the positions I-IV as indicated in the drawings is described later on.

The driving of the machine is effected from the shaft 40 upon which is fixed the crank 41. This is in connection with the crank rod 42, which is linked to a frame 43 fixed to the under side of the type bed 44. The to-and-fromotion manner to the impression cylinder 45 and to the inking rollers 46 connected thereto by means of racks and'toothed wheels in such a way that the impression cylinderwith the inking'rollers executes'movements oppositely to the ones of the type foundation. I The type bed is raised andlowered and so ar: ranged that in its lowered position it freely returns underneath the'impression cylinden For this purpose a curved groove 48 is provided'in' the driving wheel 47 mounted upon the main shaft 40 which groove a roller 49 runs. This roller isfixed to a lever 51 swinging around a pin 50, which lever is jointly connected by a rod 52 with a lever arm 53. The latter turns loose-' 1y ona shaft '7 located under the type foundation. The oscillating motion which manner described below is transferred to the shaft '7 is transmitted by means of levers 54 and 55 and guides 56 upona second shaft 7 which is locatedparallel to the shaft 7 under the type bed. The lever 54 is'firmly' connected to'shaft '7 I of the type bed is transmitted in a well known in the Upon these two shafts 7 and 7 eccentrics 7 g are arranged which in consequence of the oscil.

can be'coupled bymeans of a spring actuated H taking-along pin 57 to a disc 58 firmly mounted v on the shaft '7. His possible in this manner to -ll0' -fed, and are covered by the same.

this action set idle both shafts 7 and 7 For this purpose a bell-crank lever 6 is freely turnable on the shaft 7, the one arm of which provides a wedge surface 6 and its other arm a pin 5, which engages a curved groove 4 arranged on the switch lever 3. (Fig. 1.) In the position I of the switch lever 3 illustrated in the Fig. 1 the machine is at work and the printing and the automatic sheet feeding are switched on.

At the lower end of the switch lever 3 an eccentric projection 23 is arranged, against which leans a roller 25. The latter is located on the lever arm 2e turnable around the pin 24 attached to the machine frame 1 The lever arm 24 is connected with a rod 26, which is guided in a bearing 27 arranged in the machine frame. Fixed to this rod is a cord 29 guided over a roller 28 the other end of which engages a lever 36. The latter is pinned to shaft 31 upon which is fastened a forked lever 32. This lever engages the clutch cone 32 of the driving clutch of the machine in a well known manner. In the illustrated position of the parts the clutch is switched on.

The suckers 59 feeding the sheet to the machine are in communication in a well known manner by means of a pipe conduit 19 with a container 19 arranged in the machine frame,

which is connected to a suction pump also arranged in the machine frame and not illustrated in the drawings. In this container 19 a partial vacuum is produced by means of the pump, 50 that the suckers 59 can catch the sheet. In the wall of the contain r 19 there is an opening which is ordinarily kept closed by a fiap 35 by means of a spring 35 and in consequence of the partial vacu" um existing in the container. A lever 35 fastened to the turning axle of the flap 35 is engaged by a rod 34, which has a long guiding slot 36 at its point of engagement for the purpose described further on. The other end of the rod 34 engages a lever 33 pinned to the shaft 1 (Fig. 2). By turning the switch lever 2 into certain positions the flap 35 can be opened and the creation of a partial vacuum is prevented and by this action also the sheet feeding by the suckers 59.

In order to stop the machine at faulty sheet feeding an arm 8 is fastened on the oscillating shaft 7, to which arm is linked an up-and-down swingable push rod 9. At the lower end of the switch lever 2 is a lateralarm 14, which can be influenced by the push rod 9 in case of faulty feeding. But ordinarily the push rod upon its downward motion is swung outwards in such a way that it does not press upon the projection 14 of the switch lever 2. For this purpose a lever arm 12 is turnable around a pivot 13 in the machine frame, which arm carries on its free end a roller 11. The latter runs at the up-and-down motion of the push lever 9 along a gliding face 10 provided on the lever 9. Linked to the lever arm 12 is a rod 15, which at its other end is connected with a piston 16 movable in a cylinder 17. The cylinder 17 is in communication on the one hand by a pipe 18 with the partial vacuum container 19 and on the other hand by a pipe conduit 20 with a number of suction nozzles 20 which are arranged underneath of the sheet to be These suction nozzles 20 hold thesheet as soon as it is straightened fast for a moment. Besides, these suction nozzles 20 serve for the introduction of the dis-- engaging motion of the machine at faulty feeding.

The method of operation of the apparatus described is as follows:

The switch lever 2, 3 can be brought into the positions IIV indicated in the drawings. The effect is each time as follows:

Position I: The machine runs with paper and printing in action.

Position II: The machine runs with paper feed but printing is out of action.

Position III: The machine runs without paper and without printing.

Position IV: The machine is stationary.

If the switch levers 2 and 3 are in the position I that means if the machine works normally the cylinder 17 (Fig. 2) is temporarily brought in communication by a valve 18' with the partial vacuum container 19. This valve 18' is arranged in the pipe conduit 18 and provided with a lever arm 183 to which a cam actuated steering rod 18 is connected. By the higher outer pressure the piston rod 16 is moved in the cylinder 17 up to its stop 16 This motion takes place every time, when the push lever 9 begins its downward motion. The rod connected to the piston 16 pulls the roller lever 12 from the position shown in 06 Fig. 2 to the right and the roller 11 running upon the gliding surface 10 of the lever 9 guidesthe push lever each time to pass the nose 14 of the switch lever.

If the switch lever 3 (Fig. 1) which as before i mentioned, is firmly connected with the switch lever 2 located on the other side of the machine, is moved from thev position I into the position II. the curved groove 4 of the lever 3 carries the bell-crank lever 6 into the reach of the oscillating clutch pin 57 and the latter is pulled out of the disc 58 by the wedge face 6', so that the lever 53 freely swings on the shaft 7 and both shafts 7 and '7 with their eccentrics '7 remain stationary in their lower position. But the sheet feeding is not influenced by this action asthe rod 34 located on the other side of the machine (Fig. 2) which was shifted by the motion of the levers 2, 3, has on its end a longitudinal slot 36 and by this does not act upon the flap 35 of the partial vacuum container 19. The transport suckers 59 as well as the holding suckers 20 continue to Work inthe' ordinary way.

As soon as the switch lever 2, 3 is moved further on from the position II into the position III the rod 34 strikes with the end'of itsslot 36 against the guiding pin of the lever 35 and opens the flap 35. Now there can be no partial vacuum in the container 19 and the transport suckers 59 connected with the same can not take up'an-yfurther sheet. The sheet feeding is herewith interrupted. As the curve ief the lever 3 (Fig. 1.) runs further on concentrically to the shaft 1 the printing remains out of action. The machine runs Without paper and printing. 3

At thefurther motion of the switch; lever 3. from the position III into the position IV the roller 25 (Fig. 1) glides down from the eccentric nose 23 of the lever 3 and a spring 60 actuating on the lever 30 draws the clutch cone out of the driving clutch. The machine is set idle. 1 With faulty sheet feeding,.that'means if one or more of the holding fast nozzles 20 are not covered by the sheet a vacuum can not beproduced inthe cylinder 17. In this case the piston 16 is not 1451 pressed into the cylinder 17 at the succeeding downward motion. of the push lever9 and by'this the. push lever 9 is not swung to pass the nose 14 l of the lever 2, but a shoulder 9 of the lever 9 hits against the nose 14 of the lever'2 (Fig. 2) 15931 and turns the latter passing the positions II and III into the position IV (Fig. 3). The machine is at once set idle and printing and paper feeding are switched off during this disengaging motion.

As the push lever 9' arrests the switch lever 2 in the disengaged position IV (Fig. 3) it is necessary in order to set the machine again at work, to again lift at first the push lever 9. As this lever is located on the side of attendance of the machine, the machine can be engaged only from this side by-which method accidents can be prevented. 1

The other switches of the lever 2, 3 can be manipulated also from the other side of the machine.

In order to prevent an automatic disengagement of the machine during the preparing of the printing the piston 16 can be pressed into the cylinder 1'7 and can be arrested in this position while the push lever 9 is situated outside the reach of the disengaging nose 14. For this-purpose a disengaging lever 21 (Fig. 2) is provided whichby means of a curve 22 acts upon a nose of the rod 15. Only by the return motion of the lever 21 is the piston 16 again pressed to the outside by a spring 16'.

What I claim as new, is:

1. Control system for a cylinder printing press of the type having an impression cylinder, a reciprocating type bed, means for automatically feeding the sheets to be printed, and means for driving the press, said system comprising in combination, a device for starting and stopping said sheet feeding means, a device for starting and shutting off the 'printing operation, and means for starting and stopping said driving means of the press, saiddevices being connected to said means for starting and stopping said driving means of the press and so arranged that upon starting or stopping the press the said individual devices are respectively started-or stopped, in succession in a predetermined sequence.

2. Control system for a cylinder printing press of the type having an impression cylinder, a reciprocating type bed, means for automatically feeding the sheets to be printed, and means for driving the press, said system comprising in combination, a device for starting and stopping said sheet feeding means, a device for starting and shutting off the printing operation, and a lever for starting and stopping said driving means of the press, said devices being connected to said lever for starting and stopping said driving means of the press and so arranged that upon starting or stopping the press by means of said lever the said individual devices are respectively started or stopped, in succession in a predetermined sequence.

3; Control system for a cylinder printing press of the type having an impression cylinder, a reciprocating type bed, means for automatically feeding the sheets to be printed, and means for driving the press, said system comprising in combination, a device for starting and stopping said sheet feeding means, a device for starting and shutting off the printing operation, a shaft supported in the frame of the press, and levers for respectively starting and stopping said driving 4. Control system for a cylinder printingpress driving the press, said system comprising'in combination, a device for starting and stopping said sheet feeding means, a device for starting and shutting off the printing mechanism, a shaft supported in the frame of the press, and a control lever for starting and stopping said driving means of the press, said control lever being secured to. said shaft, an assembly of levers connecting said device for starting and stopping said sheet feeding means with said control lever, and an assembly of levers for connecting said device for starting and shutting off the printing mechanism with said control lever for starting and stopping the drive of the press, said two lever connections being so that upon starting or stopping the press by means of said control lever the said individual devices are respectively started or stopped, in succession in a predetermined sequence.

5. In a cylinder printing press of the type having an impression cylinder, a reciprocating type bed and means for driving the press, the combination of pneumatic sucking devices for feeding the sheets to the impression cylinder, a suc-' vtion conduit connected to said sucking devices,

a valve in said suction conduit to bring the latter into communication with the atmosphere, a device for starting and shutting off the printing mechanism, a shaft supported in the frame of the press, and'a control lever for starting and stopping said driving means of the press, said control lever being secured to said shaft, an assembly of levers for moving said valve and 'con 'nected to said control lever, and an assembly of,

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