US1120770A - Lithographic press. - Google Patents

Description

c. WAGNER &'A. HORMEL LITHOGRAPHIC PRESS. APPLICATION FILED JAN. 15, 1914. 1,120,770, Patented Dec. 15, 1914.

' a SHEEN-SHEET 1.

G. WAGNER & A. HORMBL.

LITHOGRAPHIG PRE APPLICATION FILED JAN. 15. 1914.

Patented Dec. 15, 1914.

SHEETS-SHEET 2.

351, @Glitomae WAGNER & A. HORMEL. LITHOGRAPHIG PRESS.

APPLICATION FILED J.-\N.15 1914 5% KN s. M m Q n J m Q m A w mw w H mm MW. \N \r I .N QR

- UNITED STATES PATENT OFFICE. 1

CHARLES WAGNER, or GRANTWOOD, NEW JERSEY, AND AUGUST EORMEL, or new YORK, N. Y.

m'rnoe'narmc Paris's.v

Specification of Letters Patent.

Patented Dec. 15, 1914.

Application filed January 15, 1914; Serial No. 812,172.

To all whom it may concern Be it known that we, Crmnnns \VAGNER, a citizen of the United States, residing at '(Jrrantwood, county of Bergen, and State of New Jersey, and AUGUST HonMnL, a citizen of the United States, residing at New York city, county and State of New York, have invented certain new and useful Improvements in Lithographic Presses, of which the following is a specification.

This invention relates to a rotary lithographic press of novel construction by means of which the desired number of prints may be produced in a simple, quick and reliable manner.

The press comprises essentially a cylinder about one moiety ofthe circumference of which is surrounded by a removable. lithographic platewhich is alternately inked and damped. After the plate has been properly inked, the matter to be reproduced, isapplied to a transfer roller, the outer diameter of which equals one half of that of the platecovered cylinder. While the plate is subsequently damped, the design, etc., applied to the transfer roller is printed upon a sheet of.

paper or other material, the proper feeding of said sheet being automatically regulated by the machine. v

The invention further comprises other novel features as fully brought out in the appended specification and claims.

a In the accompanying drawing: Figure 1 is a side elevation of a lithographic press, embodying my invention, Fig. 2 a vertical longitudinal section thereof, Fig. 3 an enlarged cross section on line 3-3,'Fig. 2, Fi. 4 a cross section on line 44, Fi 2, Fig. 5 a plan of. the paper fee 'ng means.

loose pulleys 12, 13. Upon shaft 11 is firmly mounted a drum or c linder 14, adapted to receive the lithographic plate or sheet 15, that encircles about one moiety of the circumference of the cylinder, as clearly illustrated in Fig. 3. The other half of cylinder 14 is surrounded by a curved plate 16 that is per- .manently secured to the cylinder and constitutesa support for the paper sheet durmg the printing operation proper. In order to hold the. parts 15, 16 in position, cylinder 14 is providedwith a pair of long tud nal d lacured to cylinder 14 by screws 18 and, by engaging the inwardly bent edges 19' of plate 16 hold the latter securely in position. The lithographic sheet 15 is also provided with inwardly bent edges 20 which are adapted to be slid through longitudinal passages 21 of cylinder 14 where they are clamped to keys 17 by a plurality of eccentrics 22. The latter are firmly mounted on a pair oflongitudinal spindles 23 journaled in-cylinder 14, the outer eccentrics of each spindle being provided with inwardly extending fingers 24 that are connected to the cylinder by springs 25. It'will thus be seen that in order to apply a lithographic sheet 15 to cylinder 14, the fingers 24 of each spindle 23 are turned forward to release the eccentrics 22, whereupon the edges 20 of sheet 15 are inserted and the fingers are turned back to clamp the sheet to keys 17, the springs 25 retaining the eccentricsin their operative position.

Sheet 15 is adapted to be alternately damped and inked in the following manner: Within suitable guiding means 26 of each of the standards 10 is reciprocably mounted a slide 27 provided with a pair of cam rollers 28 that engage a cam 29 firmly mounted on shaft 11. To one end of each slide 27 is adjustably secured by nuts 30, a rod 31 to which is swiveled at 32, a frame 33. Within frames 33 is hung a damping roller 34 and a moisture distributing roller 35, roller 34 being adapted to engage a transfer roller 36 jou'rnaled in a fixed arm 37, roller 36 receiving moisture from a supply roller 38 that dips into a water pan 139.

o the other end of each slide 27 is adjustably secured by nuts 40 a rod 41 to which is swiveled at vframes 43 is hung a pair of inking rollers '44 that engage a common ink transfer roller 42, a frame 43. Within 45 the shaft 46 of which is received within an. inclined slot 47 of each frame 43, the inking rollers receiving the usual axially reciprocating movement in any suitable manner (not shown). Roller45 is adapted to engage a roller 48 journaled in a fixed arm 49 and receiving ink from a supply roller 50 dipping'into well 51. The cams 29 are so shaped and setthat when the lithographic sheet passes by inking rollers 44, slides 27 are shifted toward the, left (Fig 3) so that these rollers will transfer their ink which they previously received from rollers 48, to said sheet. While the {parts are in this position, the moisture transferroller 36 is engaged by damping cylinder 14 in the direction of the arrow rollerfj roller 34 so that an amount of moisture sufficient for damping is applied thereto.

When during the continued rotation of pig.- 3),the sheet 15 approaches the dampi g'device, slides 27 are shifted toward the right to thereby bring rollers 34, '35 int'o contact with, sheet 15 so as to properly damp ,thejisamje, while] at the same time,

" fought into engagement with 'er'eby rollers 44;are inked pre- A o the next inl'iing operation. ically abovelcylinder 14 there is arreferably eyeleted. perforatheTdesired tension; The gudgeons 57 of roller {52 'z-are journaled in slide blocks 58: that are 'guided alfong corresponding ways 59 off-{standards 10, and are engaged byj ifting 'Prings 60. 'To each block 58, thereis pivoted at 61 one member 62 of an adjustable link, the other ber 63 being fulcrumed tofa' Pi 54-01%. a rock shaft 5. Members 62,- eau pro-v vided with right and left handithread'sfthat and p ne a'rithf a B93151 by properly manipulatipg t 52 is permanently intergeared' with cylinder 14 by means of apair of gear wheels 68, 69 secured to the" ends ofcylinder 14 and roller 52Irespectively,so that the roller performs exactly two revolutions while the cylinder makes one revolution.

In a direction substantially tangential to the top 91'' cylinder 14 extends a slightly inchned table 70, the latter being provided with 'a cut-out 71 for exposing the cylinder. The sheet 72 to b'ejprintedis placed upon table and is checked initsadvance by means of movable stops 73 until the lithdgraphic sheet 16 has advanced to a posi -t1on' 'to warrant 'an advance of said sheet riged a transfer roller. 52 which iscovered -by springs-88 that raise rollers 78 o y "to a ool-responding ongitudinal gro'ove-f55 'andiheldin position by screws 56an'd dqgel pifis 56?. -These screws and 'pmeife 1P 'ti-ons' of the overlapping blanket elids, so 'that' by properly tightening screws 68, the blanket-may besecured to the roller under tively fixedelbow levers 76,.the forward armsof which are connected by a rotatable spindle 77. To the latter is keyed a p111 rality-ofaxially adjustable paper feed rollv ers 78 which rollers are adapted to be lowered upona spring-influenced friction roll 79, accommodated within a corresponding tapering slotSO of table 70.. In the rear arms of elbow levers 76 are journaled arbors 81 ,'upon which are firmly mounted cam rollers 82 adapted to engage substantially semicircular cams 83flanking toothed wheels 68. Rollers 82 are, by pinions 84, S5, 86, intergeared with the paper feed rollers 78 so that the movement is positively transmitted from the cam rollers to the paper feed rollers. Stops 73 are firmly secured to blocks 87 that are in turn fastened to shaft 74. The rear arms of levers 76 are engaged roll 79 and at the sametime lower stops 73 into the pathof sheets 72 whenever thecam rollers 82 are out of engagement with cams 83.

It'will be seen that when a lithographic plate 15 has been properly attached to cylinder 14, and the press is started, said sheet will be alternatelydamped and inked owing to the reciprocative movement-of slide 27. Before printing, handle 67 is depressed to lower roller 52 so that when the inked sheet passes underneath said roller, the matter to be lithographed is transferred to the rubber blanket '53 ofroller 52., As soon as this operation has been about completed (the exact time depending upon the location of stops 73 relatively to that of cylinder 14) cams 83 engage'rollers 82 to tilt levers 76, 7 I I thereby withdrawing said stops from the are engaged. bra turnba re "66;, Shea '65 is mounted vfticallyflabov roller 52 :6 so: that;' h t s r, 52 may be lowered into" engagement'with cylinder 14, or springs 60 may be; permitted to raise the roller ofi' said cylinder. nRoller' sheet 72, which had previously been -fe to' 's'aid point by hand, and at the same ;;lowering feed rollers 78 upon roll 7 9, advance said '.paper sheet. While the lithographic matter is .thus transferred from blanket53 to sheet 7 2, the lithographic plate,

15 is damped by rollers 34, 35 prior to the next inking operation. Upon the'oompletion of the printing of sheet 72, cams 83 clear rollers 82 to permit springs 88 to lift rollers 780E roll 79 and lower stops 73, against which the next sheetto be printed,

encompassinghpprom'mately half the. circumference thereof, a damping roller-,an inking roller, and common means for simultaneously reciprocating the damping roller 180 is placed by hand, whereupon the operation 1 adapted-to be removably secured thereto and cumference thereof, a slide, damping rollers and inking rollers carried thereby, and means for reciprocating the slide, whereby the damping rollers and inking rollers are alternately brought into engagement with the lithographic plate.

3. A lithographic pre' ss comprising a rotatable cylinder, having a pair of diametrically opposed longitudinal grooves, a curved a er su ortin late encircling'approxiia tely 0d? half 5f the circumference of said cylinder and extending into the grooves thereof, a pair of keys seated within the cylinder-grooves and adapted to permanently hold the plate to the cylinder, alithographic plate encircling approximately the other half of the cylinder-circumference andalso extending into the cylinder-grooves,

and spring-influenced eccentrics adapted to clamp said lithogra hic Elate to the keys.

, CHXRL S WAGNER. -AUGUST HORMEL. Witnesses:

, ARTHUR E. ZUMPE, FRANK v. BRIEsEN.

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