US1466526A - Printing machine - Google Patents

Description

Aug. 28, 1923. V 1,466,526

' E. GROSSE PRINTING MACHINE Original Filed May 5. 1921 Jzregffgg; @Mw

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:Patented Aug. 28, 1923.

EDUAR-LD eaossnjor .wnonwrrz NEAR zonnsnnn, e narinnyf p PRINTING MACHINE.

"Original application filed May 5, 1921, Serial No. 467,187. Divided'and this application filed June 9, 1 I I, 1922. Serial-No. 567,233. '1 1' m.

To all whom it may}, concern: r 3 transfer cylinder in ,the upper position.

V Beit known that I, E UARD Gnossn, a citi The form 13 is arranged abovethe path of zen of Germany, and residing at Wachwitz the platen and theelastic flat 'form 14; is near Dresden,- .Grundstrasse 8, Germany, arranged onthe printing level of the platen have inventedjcertain new, and useful Im- 11 so that'the later will be pressed against provements in Printing lllachines of-which it when itfis brought intoprinting position. the followingis aspecitication- V "Theform 13 is inked bymjeans of the to-' This invention isa divisional application and-fro moving, inking rollers 5 which in from the parent application Sen 67,l87 turn are being moved by'thelever arrange- .IQ filed May5th 1921. v 7 'nien't 60,v 61, 62. The transfer of the'print-"G The present invention ,relates to a platen ing picture from theform 13*tothe elastic press which is simultaneously adapted to flat form 14 isefl'ected by means'of the direct as well as indirect printing. Indirect transfer cylinder 6 which, through thelever or off-set printing was heretofore known arrangement 63, 64,765-is moved-to-and-fro 15 only in connection with lithographic rotary over both forms. The transfer cylinder 6 '65 and rapid printing machines. 'The present and the flat form let are covered with elasinvention applies'this method of printing to tie material, preferablyrubber. Theannuplaten presses used in printing establishlar circumference of the transfer cylinder as ments for printing from composed type and an incisionj66, which. during the to-and-fro cuts, and this application naturally required movement of'the' transfer cylinder. over the fundamental changes in the known type of ink rollers 67 is in such a position to-covor platen presses. the ink roller In thismanner the trans Printing with the aid ofthe known type, fer cylinder 6' can easilyroll over the ink of platen presses was accomplished by pressroller 67 without touching it. Y 1

ing the workpiece by means of the hard sur- In the position for laying-on the sheets face of the platen directly onto hard surface wherein the press is'shown in the drawing. of the form which usually consisted of metal. the transfer cylinder 6 is shown at the lower This required a very highpressure necessiend of the flat form 14, the'inkingrollers 5" tatingthe use of very strongly constructed lie on the ink roller 67 and receive inkfrom 30 machines; H the latter: Assoon as the platen 11 begins According to the present invention if the to get into printing position, the rollerspass indirect method of. printing is being femover the forms 1 and l3'into the position ployed', pressure is'no longer directly exerted shown in dotted lines 6, 5 2- Theinking upon the hard form, but from theilatter, by rollers 5 are then in the position indicated 5 means of an elastic, preferably rubber-covby 5 upon the ink rollers 3370f. the, inking ered roller v atransfer is taking place to an arrangement and are now supplied there elastic flat form against which the platen with ink. with the workpiece is being pressed whereby V In the meantime the platen has gone into 7 the transferred picture or composition is printing position by'pressing itself against 40 again being transferred from the. elastic the elastic, flat form l lz. If the platen has flat form to the workpiece or working sheet. finished its printing aotion,the transfer cyl By inserting this elastic flat formthe inder Gpasses fromthe position 6 overthe amount of pressureneededv is considerably form l3 and takes oil" from the latter; in reduced and even in the productionof very form of an impression, the ink previously .7

4 large sheets only a slight pressure is-iieeded, supplied by the inking rollers; ,bridges with 'lhe attached; drawings indicate one emits incision 66 the inkroller 67 enters then bodiment of the invention, Figural ;repre upon the elastic form' 14 andtransmits its senting a sectional view of theplaten press, impression to the latter-, until it'ar-rives, at Figure 2 shows the transfer cylinder inthe the lower position 6 where it reverses its O lower position; while Figure 3 shows the movement in the opposite direction, c-

they remain for a short time, rotate through friction with the ink roller 67 and are supplied with ink by the latter. With this fresh supply of ink theytink again the form.

13 on their return trip to the inking arrangement 33, 34. The c1rcu1nference of the inking rollers is large enough to permit ust one rotation during 1ts passage over ing rollers-5 remain stationary for apshort time over the ink rollers 33 and 67 and the to-and -fro movement of the lever arrange the form 13 whereby uniform inking without the formation of any stripes "s assured. For'the purposerof receiving ink filllll'llQ ment 60,61, '62 is arrested for the same period when the cranks are reversed. This is effected by means of the spur wheel 8 which is equipped with 'teethon parts of its circumference and whose toothless parts always cause during rotation a shortstop of the cog wheel 68 driven by it, Spur wheel 8 together with spur wheel 38 is mounted on themain shaft 9 to both ends of which are also attached the cranks 10 which by means of the connecting rods 10 effect the 'movement of the platen 11. The two spur wheels 8 and 38 rotate therefore in the same manner as the cranks 10 of the connecting rods. Spur wheel 8 engages with the crank wheel 68 whose cranks 69- operate the rod with lever arm 6i and the guide rod 62 with'the linked-on carrier 70 of the inking rollers 5. j i

As the spur wheel 8 has two toothless spots arranged opposite each other, it drives the crank wheel 68 at the toothedparts only while the crank wheel 68 remains stationary during the passage of the toothless spots in' order to cause-the lever arrangement 60,61, 62 and the linked-on carrier 70 of theink ing rollers 5-to occupy always in the moment of'stopping the position on the ink rollers 7 33 or the ink roller 67.

7 transfer cylinder 6 mustcarry out one of" The spur wheelf38 engages with the equal- 1y large crank wheel 71 and actuates by means of the crank 7 9 the lever arrangement 63,64, and the linked-on carrier of the roller 6 in such a m'annerthat*theroller 6 at each turn of the wheel'is led onceto-andfro over the forms 13"and14c. i

As a repeated transfer isnot'desirablethe its two movements, i. e. either the'forward or the backward movement, without touch ing the forms 13 and 14. The constructive;

example shown here exhibits the transfer cylinder in raised position during its movement from the lower position 6 to the upper position 6. As lifting device serves f; 1. a

wedge 72 (Figs. 2-3) arranged under the elastic sliding bearing 72 of the transfer cylinder 6; this wedge can slide to'the, right :or left and-cause therebya raising or lowering of the transfer cylinder 6. If the wedge '72 is moved to; theright; (Fig. 2) the sliding bearing 72 will be raised by sliding on the inclined plane of the wedge 72 and the transfer cylinder. 6 will maintain a certain distance .fromthe forms 13 and:14:.

If, onthe other hand, the wedge is pushed to the left as indicated in 3, the sliding bearing will be lowered and the transfer cyl-. inder 6ftouches on; its return trip the forms 13" and'l l. Themoving of tll wedge 72' is effected by means of adjustable steps 73,

'Ztprovided at both ends ofthe; roller path;

these stops are touched by extensionson the right and left end of the wedge 72. 1fhe lifting device can also consistiof any other suit-able mechanism. I j

Having now described the nature of, my invention and how the same may be per formed, what I claim and desire to secure through Letters Patent is p 7 1. In improvementsof platen presses the combination of a. platen, a form arranged above the path of the platen, an elastic flat form situated on theprinting level of the platen and to-andfro movinginking rollers;

' so I means of moving themover the. form, and V a transfer cylinder, also means of moving this transfer cylinder over the elastic flat form and the form and an inking arrangement, exactly as described. Y I

2. In improvements of platen pressesthe combination of a platen, a form arranged above the path ofmovement of the platen,

an elastic fiat form situated on the printing level of the platen, to-and-fro moving ink} ing rollers, a system of levers adapted to move. the inking rollers over the form, and a transfer cylinder f and levers adapted. to move the transfer cylinder, over theform and the elastic flat form the transfer cylinder transmittingfthe printing picture? from the form to the elastic flat form, alsomeans of causing the platen to make alternate movements corresponding to the upward, and

downward movement of the inking rollers and the transfer cylinder in such a manner that the P g ct n; ake p ace after the passage of the transfer'?cylinclerover the elastic form and during the inking oi the as describedi :1

i 3. In improvementsofplaten presses 'ithef form by" means of the ijnking rollers, eggactly V mb n ion a platens a erm; elastic V fiat f m; nking r ler and a transfer. sylier p ifiiers n sl i' eabearie a nem ham m adapte te ift the. tr nsfer cylinder'olff the form and the elastic fiat form during one to-and-fro movement i so In testimony whereof I aflix my signature that durlng one forwardrmovement the trans- 1n presence of two Witnesses. fer cyhnder remems out of touch W1th the flat elastic form and. the printing form While EDUARD G E' 5 during its return trip the contact is re-. Witnesses:

established, or vice versa, exactly as de '0. LANDESKROENER',

scribed. WAPPLER. I

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