US1446379A - Laying-on and removing device for platen printing presses - Google Patents

Description

LAYING-ON AND REMOVING DEVICE FOR PLA'IENPRINTING PRESSES FiledMay 18, 1921 5 sheets-sheet l LAYING-ON AND REMOVING DEVICE FOR PLATEN PRINTING PRESSES Filed May 18, 1921 5 sheets-sheet 2 Fig.2.

Jnvelfc or MAW Feb. 2Q, 1923.

' G. BORNSCHEIN LAYING-ON AND REMOVING DEVICE FOR PLATEN PRINTING PRESSES 5 sheets-sheet 5 Filed May 18, 1921 Patented Feb. 2Q, 1923.

GEORG BORNSCHE INQ 0F stems, G eenest;

LAYING-ON ,An'n 'nniviovine'nnvion ro ri'rik'rniiii niif rinriinssn s.

A inieltitnmreaivity is, 192-1. 1 Serial in). 470,532.

T 0 all'whomit may concern) Be it known thatl; Gnone Bon'nsei-inln, a citizen of Germany, residingiatf 16 Moltke: strasse, Bautzen Germany have invented certain new and useful Improvements in' ai Laying-011' andlteni'o'ving Device for'Platen l rint ing Presses, of whichthe' follotving ls' aspecifioation. i

The 'nventioii relatesfto a laying onPand removing device for platen printingpres'ss According to theinvention the grippefon sucker grips the sheet on 'thelaying ontable positively, draws it downwards on to the stir face of the platen, holds it firmly during printing and after printing transl'ers' itto' a delivery device, disposedabove the lay'rrrg on table, Which deliversthesheet to a 'reoeiv ing table. The backward and forward. movement of the grippers is' preferably ef :t'ected by means of levers hinged to the platen, these levers being rooked atoo'thed Wheel also provided on the" platen! The toothed Wheelis driven by a ra'cl; h'iii gedto the machine frame, the toothedWheel'being adapted to roll on the rack on the movement of the platen. The connecting rodbetween the levers and the toothed Wheelis'p' ret'erably adjustably connected to the levers so that the magnitude of the oscillatory movement of the levers can be adjusted, whereby the oscillatory movement may be made to suit the size 01 thesheets to be rinted;

The device has the: advantage that the laying-on and removalo't the sheet is effected entirely automatically. During the Whole operation the sheet to be printed or the printed sheet is under the observation ofthe' layer-on so that it may be observed continuously during the operation a The device hasin addition the advantage that in consequence-of the variability of the path of the sheet the machine be runat a higher speed for smaller sheets byreason of the shorter path. The provision oi laying-on marks on the operative surface oi the platen is unnecessary.

, In the accompanying drawing is illustrated by Way of example a constructional term of the subject of the invention.

Figure 1 shows a side elevation of the essential portion 01 a platen'printingpress which is the subject of the invention, the platen be inp; in the laying-on position. i v

Figure 2 shows a side elevation of the platen printing press With the platen in t e"- printingposition} the delivery" assion of the platen being indicated by chain porting" I me its the grippers-,- the operatioi'rof t e ripper-M 7 anon cireulai" shaft: Figlirdft shov'vsf the" drive for this n on circular shaft to a" smaller scale; this being [Figure 0" shows a plan correspofidin'g' to Figure Flg-ure guided thereinfi to'which the gripper supporting plate is secured: j

thrbugh thtecamand itsassqdiated arts; and

Figu'refS shows an enlarg edsideelevation ofth e platen and thrmin' closed position;

- On the frame 1 of the platen printing pressyisprovided the" latens; Itis operated and "advanced on the fraine by" the driving' pulley through the inediihr'i of the connecting r'odlfinth known nan ne'r. The" movement (if-the 'plate'i Q' is controlled by the pin *5; which is r'igidlyse'ciii'ed'to the machine frame 1- and engages" in a slotted g uide o", rigidly. corineeted to" the platen: To eaeh side of the platen curved lever 7 is hinged atS. The'twoleve'rs 7 arerigidlv connected together by a shaft" passing across" the Inachiiie. One o i"the-leversis rovide'dwith a slottedplate 91 In this is 'ad ustably' mounted' a bolt .10 thisbolt be locked in the slotted plate' 'bj a Wiligednutfll? To the boltlO 'is'hingedly connectedone end of the eont're'ctilig rod 12, the other end or the rod being pivotally conneeted' to the toothed wheell r The toothed whe'el13is rotatably mounted onthe platen Q'and' engages with. a rack 14, Whichis-pivoted to the machine frame at 15'; Y

On'the movementof'the platen the toothed wheel 13 rolls downthel rackl l andconse quently reeks the'levers'i' by means of the connecting rodlZ. The rocking movementof thelevers 7 isgreateror smaller, according as'to hetherthebolt lOis'adj'ust-ed in the slotted"plate 9 at a longer or shorter distanc'efrbnithe fulci'hm 8 of the levers 7.

Blocks 17 guided in the operative faceof the platenare linked to the'ends ofthe levers 7 means of links 16. To these blocks is seeuredaplate lsKFigures 4 ands) passing Gsl'io Sasecti'on oftlie corhe'fof the platen with front view of thef black into the open position againstthe actioniof i these springs by thenon-circular shaft '21,

(Figure For driving this shaft 2 l there rigidly securedat oneend thereof a lever22 having anumb er of arms. 7 One arm of, this lever engages in a recess 23 of the block 17,, and

projects into a longitudinal slot2l in the block, leading to the recess 23.

A groove '25: is formed in the lateral edge ofthe platen, to guide the block 17 and a blade spring 26 is arranged in the groove so as to project over the bottom of the groove. On the movement of thehbloclefrom the lower edge of the platen, tothe upper-edge thereof, the downwardly directed arm ofthe lever22 strikesa-gainst the spring, 26, and is thus turned in a clockwise direction.- The.

arm of the lever which up to the present has been horizontal is thus moved into an almost vertical positionn The return movement of the lever and the consequent turning of the non-circular shaft 21 in a anti-clockwise direction is eifected by the lever 27. :This

is pivotally'mounted on the pivot 28 (Figures l and 2) and is rigidly connected to the lever 29 to which is hinged the connecting rod 30. The end of this connecting rod carries'a roller 31 which-is guided on a cam 32 on the driving pulley 3. As shown in Figure 7,'the crank pin of the driving pulley- 3, which moves the connecting rod 4 forthe platen2 back and forth, is lengthened and the cam 32 is mounted fast thereon, in such a way that said cam in no way hinders th movement of the connecting rod 4. i

Referringto Figure 8, it will be seen that the grippers 19 doi not strike against the form when the platen is in itsprinting'position by virtue'of the fact that these grippers are not as thiclcas thedifference between the height of the type 36 and the height of the closing material 37. v In the position of the lever 22 shown in full lines in Figure 1 ,thefiat surface ofv the shaft 21 is at the side'and also in the chaindotted position shown in Figure 3. I a In this position the gripper isopen and ready toreceive a sheet. I 1

Ifthe'lever 22 is broughtinto the chaindotted positionin Figure 1 by the-lever 27 the flat surface of the shaft 21 is at the top 1n a horizontal position.- In this :position the gripper is closed by -the'acti'on;'of-tl1espring 20 and grips the sheets inserted therein. I I j The operationof the device is as follows:

The sheet on the laying-ontable, 33 is moved under the gripper 19,; As soon as the and the sheet device and transferred By reason of the movement ofthe platen,

the toothed wheel 13 rolls down the rack 14. It rocks the levers 7, as above described so'that the grippers, hinged to these levers, are drawn over the surface of the platen into the press,

'Whentheplaten has almost reached the printing position the rack 14 and. the toothed wheel 13 have assumed such arelative position,-that on the further movement of the platen to the printing position no further movement of the levers? and the grippers 19 takes place.

After the printing has been completed the platen is swung backin theknown manner, During this return movementof the platen thelevers 7 are again swung, backwards and consequently also the grippers, and with these the sheet, are moved upwards the end of the, sheet' projecting beyond the upper edge of the platen is thus brought into the delivery device 34, provided above the laying-on device, which consists of rollers and one or more delivery bands. As soonas the platen 2 reaches the chain-dotted position in Figure 2, the sheetis gripped by the delivery to the receiving table 35. v

Finally the plat-en 2 again returns to the position illustrated in Figure 1 and during the latter position of this ,movement the grippers 19 have again been opened by the spring 26. The device is now ready for the commencement of anotheroperation.

1. A laying-on and removing-device for platen printing presses the arrangen'ient of grippers adapted to grip the sheet on. the laying-on table means'for positively moving the grippers with thegripped sheet downwardly overthe platen so that the upper edge of the sheet coincides with the upper edge of the platen and to, hold the sheet during the printingoperation and after the printing operation; ;to transfer them upwardly over the platen,v a delivery device disposed above thelaying-on table for delivering the sheet from the grippers to the receiving table substantially, as described and represented hereinbefore. g i 2. Alaying-onandremoving device for platen printing presses thearrangement" of grippers adapted to grip the sheet on the platen printing presses, the arrangement of grippers adapted to grip the sheet on the laying-0n table, levers hinged to the platen,

a toothed Wheel pivoted to the p1a,ten,e rod with one end adjustehly connected to the levers and with the other end hinged to the Wheel, a rack hinged to the machine frame,

the Wheel gearing with this reek, a delivery device disposed above the laying-0n table for delivering the sheet from the grippers t0 the receiving table substantially as described and represented hereinbefore.

In testimony whereof I afiix my signature.

GEORG BORNSCHEIN.

Images