US1709812A - Printing press - Google Patents

Description

April 16, 1929. wElDE 1,709,812

PRINTING PRESS I Filed April 19, 1927 6 Sheets-Sheet 1 Fig.1.

April 16, 1929. wElDE 1,709,812

' PRINTING PRESS Filed April 19, 1927 e, Sheets-Sheet 2 M Mar/Zea April 16, 1929. wElDE 1,709,812

PRINTING PRESS Filed April 19, 1927 6 Sheets-Sheet 5 April 16, 1929. R. WElDE 1,709,812

PRINTING PRESS Filed April 19, 1927 e Sheets-Sheet '4 7L/ 1 y a v 0' y 6Z2 I '7 Z/ T m 4 4 Z a; Jaw/flan ax/mm final 2 /ffim M 97,

April 16, 1929. R, WEIDE 1,709,812

PRINTING PRESS Filed April 19, 1927 6 Sheets-Sheet '5 Jaye/2301? RmMfl/hfle.

April 16, 1929. WEIDE 1,709,812

PRINTING PRESS Filed April 19, 1927 6 Sheets-Sheet 6 32ml! Wide Jizvelzhw:

- '50 and the jaws of the hater-uteri Apr. -16, 1929.

NITED' BUDOLF WEI DE, F BERLIN, GENY, ASSIGNOR 1'0 BERLIN, GE 2:; 3h: A

:nnnwn' ncnwrrz & co, or

rnrn'rino rnrss.

Application iil ed April 19, 1927, Serial No. 184,969, and in Gary i9, 19%. w

My invention relates to improvements in printing presses, and more particularly in printing presses comprising a rotary jplate cylinder, and a rotary impression cylinder,

5 and the vobject of the improvementsis to provide a press of this type in which means are 1 provided for positively guiding the sheet of paper from the feeding apparatus to the delivering apparatus. In machines as now con- 10 structed the sheet of paper tends to stick to theplate cylinder, a nd to be carried thereby away from its proper path. In my improved 4 printing press this objection is obviated. it will be understood that various mechanical means may be provided for thus positively feeding the sheet of paper. For example, 1 1 may make use of feeding apparatus such as are used in machines of the textile art for feeding fabrics, the said apparatus comprising travelling tapes or bands and-the like equipped with clamping means, needles, and the like. In the preferred'construction described hereinafter the positive sheet feeding mechanism consists ota gripper adapted to grip the sheet of paper at its leading edge and to more the same at a velocity equal to the circumferential velocity of the plate cylinder to the delivering apparatus, and to release the same after it has been engaged by the said delivering apparatus. After having vthus transmitted the sheet to the delivering apparatus, and afterthe sheet has been inoved out of printing position, the gripper is removed into initial position for gripping another sheet. r

For the purpose of explaining the invention an example embodying the same has been shown in the accompanying drawings in which the same reference characters have been used in all the views to indicate correspondin parts. In said drawings,

Fig. l, is a diagrammatical elevation showing the printing apparatus and the means ior positively guiding the sheet,- the said means being in the position ready for engaging the.

leading edge of the sheet,

.Fig. 2, is a similar elevation showing the parts in the position in which thestop has been retracted out oif the path of the heet gripper have beenfc osed on the said sheet, 1

Fig. 3, is a similar elevation showing the parts in the position inwhich the gripper has moved the'leading dge of the sheet into positionf for engaging the said delivering means, as the aws being still closed on the sheet,

Fig. 4, is a similar elevation showing the next step of the operation of the apparatus, tple paws of the ipper having released the s cc Fig. 5, is'a silar elevation showing the next step of the operation, the mechanism operating the jaws being again lockedto the mechanism for moving the gripper, d

Fig. 6, is a similar elevation showingthe on last step of the operation, the stop being in initial position, and the gripper being on'its wa to the saidinitial position.

n the example shown in the figures my improved printing press comprises a rotary to plate cylinder D, a rotary, impression cylinder A, the shafts W and m of thesaid cylinders being mounted in relatively fixed bearings, a feeding apparatus S for successivel feedin sheets of paper from a pile thereof into posito tion between the ipression and plate cylinders, and a delivering apparatus com rising rollers a and o. in the operation 0 the machine the cylinder D is rotated in the direction of thearrow P, and the sheet of paper p til is taken from a. pile by means of the feeding apparatus S and ted thereby with its leag edge into engagement with a sto c, the said stop being disposed so that the leading part of the sheet is disposed between the impresea sion and plate cylinders. The said stop 0' is mounted on suitable gearing directly controlled froin the plate cylinder and adapted to be retracted away from the plate c man when theplate oi the plate cylinder is in on position for beginning printing. Attcr the 'stop has thus been retracted the means for positively moving thesheet through the chine are throwninto operation.

In the construction shown by way or enamon pic in the figures, the said positive guiding means are in the ilorm of a gripper comprising jaws a and h, and inthe position of the parts shown inl' i. l, in which a sheet .p has just been passedtween the cylinders roe andinto engagement with the stops 0, the ewe a and b are open for receig the lead- I mg edge of the sheet. The jaws o and h are located between the stops 0, sothat-both parts can simultaneously be in position iior receivthe ing the leading edge-oi the sheet. r For operating the grip'per a, b to mecha nisms are needed, one mech mg. provided for opening and closing the jaws a and b, and the second mechanism being provided for moving the gripper as a whole from the position shown in Fig. 1 into the position shown in Fig. 3 and for moving the sheet p into engagement with the delivering rollers u The second mechanism is constructed and '0. so that the jaws are arrested after delivering the leading edge of the sheet, until the said sheet has been removed b the delivering rollers from the machine, w ereupon it is'returned into the position shown in Fig. 1 in which the jaws are ready for gripping another sheet. Both mechanisms controlling the movements of the aws a and I) depend on the printing operation, and they are timed so that the plate c linder andthe gripping ap paratus move i unison while printing is performed. For this reason both 'mechanisms operating the gripper, viz the mechanism for opening and closing the jaws, and the mecha nism for moving the gripper as a whole, are directly controlled from the plate cylinder D or the shaft W carryingthe same. In the example shown in the figures the said mechanisms are controlled by means of cam disks Z provided one on each side of the plate cylinder and fixed either to the end faces thereof or to the shaft W, the saidcam disks being thus uniformly rotated at the velocity of the plate cylinder. In addition, a controlling member k is fixed to the end faceof the cylinder D. In

the'diagram illustrated in the figures the controlling member k is shown integral with one of the cam disks Z. But I wish it to be understood, that my invention is not limited to this feature, and that the construction has been shown merely by way of example. The cam disks Z cooperate with slides Q provided with rollersQ' engaging the cam ,disks Z, and the said slide is connected by alink .I with an arm 7' secured to a rock shaft 0. "On the said rock shaft 0 a tubular member s is rockingly mounted, and to the said tubular member a disk 1- formed with a notch t is secured. Suitable means are provided for rocking the tubular member s in clockwise direction. To show what may be done a rope 2 carrying a Weighted body 3 is trained on the tubular member in the manner shown in Fig. 1. I wish it to be understood that the said weighted body and rope have been shown merely byway of example, and that other means maybe provided for rocking the tubular member s m clockwise direction, such for example as a spring-actuated mechanism. To the tubular member s an arm a is fixed, which is connected by a link with an arm zsecured to the upper aw of t e gripper, the jaw 6 being rockable relatively to the Jaw a by the mechanism just described. The jaw a is fixed to an arm d se-- cured to the rock shaft 0,- so that its movement is controlled through the intermediary of the arm 1%, the rock shaft 0, the arm 7', the link'J, the slide Q and the cam disk Z from the cylin-' der D. By the gripper and its operating mechanism thus describedtheleading edge of the sheet of paper is gripped" at the proper time and positively moved thereby from the position shown in Fig. 1 into the position shown in Figs. 3 and 4, whereupon the gripper is returned into initial position, the gearing 3 2 closing and opening thejaws a and b at the propertime. I

The rocking movement of the tubular memhers is controlled by two mechanisms. In the position shown in Fig. 1, the tubular member s is arrested in position by a roller 11. engaging in the notch t. The said roller n is mounted on a bell crank lever n rockingly mounted on an arm 0' of the rock shaft -0 at o, the said bell crank lever carrying a roller 9. When rocking the system 9, 0, n in anti-clockwise direc: tion the tubular member s and the parts connected therewith are rocked in clockwise direction by means of the weighted body 3.

The mechanism for thus rocking the system 0, n is constructed as follows:

On the axis m of the impression cylinder A a lever Z is rockingly mounted. When rocking the said lever in anti-clockwise direction a cam member m engages the roller 9 and forces the same downwardly, so that the roller 11. disengages the notch t, a spring Z being pro- Vided for retracting the cam member m. away from the roller 9. After the roller qhas been released a spring a" rocks the system q, '0, n with the roller ninto engagementwith the disk 7' andthe notch t thereof. The upwardly .directed arm of the lever Z carries a roller 6 which is in position for engagement by the cam member K. Before feeding the sheet by means of the gripper a, b from the position shown in Fig. 1 into the position shown in Fig. 3 the stops 0' are retracted o'ut'of the path of the said sheet. As shown, the said stops are mounted on an arm 11. rockingly mounted at h and rigidl connected with a lever cl. The said lever is acted upon by aspring (F, and it'is connected with an arme' carrying roller g located in position or engagement with the plate cylinder D, and more particularly with a cam f provided thereon. 1 J

The operation of the feeding apparatus is as follows:

In the position of the parts shown in Fig. l the leading edge of the sheet of paper has ]11St arrived in position for engagement with the stops 0 and the open gripper a, b, the

plate cylinder D and the plate D provided thereon are about to arrive in printing position and into engagement with'the impresby the weighted body 3 in clockwise direc tion. Thereby the arm a; and link 3 have rocked the arm 2 thus moving the jaw b ,to-

gripping the leading edge of the paper.

So far the slide Q has not been moved, and the gripper as a whole has been stationary. Upon further rotation of the plate cylinder D into the position shown in Fig.3, the stops remain in the position illustrated in Fig.2, by reason of the circular form of the cam f. But the cam disk Z' acts throngh the intermediary of the slideand the link J on the rock shaft 0 so as to rockthe arm d carrying the gripper in clockwise direction. Thus the gripper, the jaws of which are closed on the sheet of paper is moved to the right, this pulling thesheet p with its leading edge into position for engagemet by the delivery rollers u, 'v. The arm d and the link y are connected with each other by a spring .Thus the jaws remain in closed position while. the gripper moves from the position shown in Fig. 1 into that shown in Fig. 2. i

The rocking movement of the tubular member sand the disk 1' is arrested slightly after the parts have passed the positions shown in Fig. 3,.by reason of an adjustable stop 72' engaging an arm a carried by the tubular member, the length of way between the position of the parts shown in F 3 and that shown in Fig. 4 in which the arm a engages the stop'b being such that at the end of the rocking movement of the disk 1' the jaws a, b are again opened by the rocking movement of the shaft 0 and the gripper cl into the posi. tion shown in Fig. 4, so that the leading edge of the sheet p is released. The position of the stop 0 has not been changed. The bell crank lever 12, 0; g, which is connected through the intermediary of the arm 0 with the shaft 0, and which therefore is likewise controlled by the cam disk Z, has continued its rocking movement in clockwise direction, while the parts move from the positions shown in Fig. 4 into the position shown in Fig. 5, and its roller n engages again in the-notch t, the disk 7' being arrested by the stop 1). Thus the tu bular member s and the disk 1' are locked rela-. tively to the shaft 0 and to the gearing controlled'by the cam disk Z.

While the parts move from the position shown in Fig. 5 into that shown in Fig. 6, the

slide Q is moved upwardly by the cam Z. Thus the shaft 0 is rocked in anti-clockwise direction thus moving the arm (1 of the gripper and the tubular'member 8 locked relatively to the said shaft by the roller? and,

all the parts carried thereby intoinitial positions. Simultaneously the cam f has re-.

leased the roller 9, so that the lever d is rocked by the spring d in anti-clockwise direction, thus returning the stops 0 into initial position, in which a new sheet 1 is again arrested. v

By the further movemgnt'of the cam disk Z in the direction of the arrow P the shaft 0 is further rocked in anti-clockwise direction,

so that the arm d of the gripperis returned into the position shown in Fig. 1, in which the open jaws engage theleading edge of the sheet. Now; upon further rotation of the plate ratus 1s repeated. v w

It may be found desirable under some circumstances to omit the stops 0' completely. It will be noted that the gripper d is shown. in Fig. 1 in a position to receive and retain the paper sheet prior to the printing operation regardless of the presence or absence of the stops, arid the function of the mechanism cylinder D, the operation of the appa will not be materiallyaltered by the omission 1 of the latter. 7

While in describing the invention reference has been anade to a particular example embodying the same I wish it to be understood that my invention is not limited to the construction shown in the drawings, and that various changes may be made in the general arrangement of the apparatus and the construction of its the invention.

helaim: v

1r In a printing press, the combination, with a rotary plate cylinder, and a rotary sheet to said cylinders, means for delivering the sheet after printing. a gripper compris= with a rotary plate cylinder, and a rotary impression cylinder, of means for feeding a sheet to said cylinders, means *for dellverlng parts without departing from 100 impression cylinder, of meansfor feeding a i the sheet after printing, a stop member for arresting the sheet being fed in position between said cylinders, a gripper comprising" clamping j awsadapted to grip the sheet, and I mechanisms controlled by said plate cylinder for moving said stop member into and out of position, for opening and closing said jaws,

and for moving said gripperfrom said cylinders to said delivering means and back again 3. In. a printing press, the combination, with a rotary plate cylinder, and a rotary impression cylinder,.of means for feeding a sheet to said cylinders, means for deliverin'g the sheetfafter printing, a gripper comprising a pair of jaws adapted to engage said sheet, normally locked power operated means tending to'close said jaws, means controlled by said plate cylinder for releasing said power operated means, and mechanism positively controlled by said plate cylinder for moving said gripper from said cylinders to the delivering means and back again;

4. In a printing press, the combination, with a. rotary plate cylinder, and a rotary impression cylinder, of means for feeding a sheet to said cylinders, means for dilivering the sheet after printing, a gripper'comprising jaws adapted to grip said sheet, a rock shaft adapted to be rocked by said plate cylinder, an arm fixed to said rock shaft and carrying said gripper. and adapted when rocking said shaft to move the same from said cylinders to said delivering means and back again, a normally locked tubular mem-' her rockingly mounted on said rock shaft and connected with said jaws for opening and closing the same,.power operated means tendingto rock said tubular member into position for closing said jaws, and means controlled by said plate cylinder for releasing said tubular member. r a

'5. In a printing press, the combination, with a rotary plate cylinder, and a rotary i1n pression eylindei', of means for feeding a sheet to said cylinders, means for delivering the sheet, after printing, a gripper comprising jaws 'adapted to grip said sheet, a rock shaft adapted to be rocked bysaid plate cylinder, an arm fixed to said rock shaft and carrying said gripper and adapted when on said rock shaft, a notched disk fixed to said tubular member, a rockable locking member carried by said rock shaft and adapted for locking engagement with the notch of saiddisk, power operated means tending to rock said tubular member on said rock shaft, and mechanism cont-rolled by said plate cylinder for throwing said rockable locking member into releasing position. 7

' 7. In aprinting press,'thecombination,with a rotary plate cylinder and a rotary impression cylinder, of means for feeding a sheet to said cylinders, means for delivering the sheet after printing, a gripper comprising jaws adapted to grip said sheet, a rock shaft adapted to be rocked by said plate cylinder, an arm fixed to said'rock shaft and carrying said gripper and adapted when rocking said shaft to move the same from said cylinders to said delivering means and back again, a tubular member rockingly mounted on said rock shaft, a notched disk fixed to said tubular member carried by said rock shaft and adapted for locking engagement with the notch of said disk. power. operated means tending to rock said tubular member on said rock shaft, an arm carried by said tubular member, a relatively fixed stop adapted for engagement with said arm and for arresting the rocking movement thereof, and mechanism controlled by said plate cylinder for throwing said rockable locking member into releasing position.

8. In a sheet gripping device for printing rocking said shaft to move the same from said presses, the combination with a rotary plate cylinders to said delivering means and back again, a tubular member rockingly mounted on said rock shaft and connected with said jaws for opening and closing the same, power operatedmeans tending to rock said tubular member into position for closing said jaws, a locking member carried by said rock shaft and adapted to lock said tubular member relatively thereto, and means controlled by said plate cylinder for. setting said locking member into releasing position. i

6. In a printing press, the combination, with a-rotary plate cylinder, and a rotary impression cylinder, of means for feeding a sheet to said cylinders, meansfor delivering the sheet after printing, a gripper comprising jaws adapted to grip said sheet, a rock shaft adapted to be rocked by said plate cylinder, an arm fixed to said rock shaft and carrying said gripper and adapted when 1 rocking said shaft to niovethe samefrom said cylinders to saidfdelivering means and back again, a tubular member rockingly mounted cylinder and a'rotary impression cylinder, of means located to the rear of the'pr'inting zone with respect to the direction of movement of the sheet for seizing the forward end of a sheet as it is fed between the cylinders, and mechanism for moving said means away from said cylinders during printing engagement between the cylinders and sheet. t

I 9. In a sheet gripping device for printing presses, the combination with a rotary plate cylinder andarotary impression cylinder, of means located to the rear of the printing zone with respect to the direction of movement of the sheet for seizing the forward end-of a sheetas it is fed between the cylinders, mechanism for moving said means away from said cylinders at the linear speed of the latter during printing engagement between the cylinders and sheet and for returning said means to position. for seizing the following sheet.

In testimony whereof I hereunto aflix my signature.

. I V RUDOLF wEmE.

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