US1482352A - Printing press - Google Patents

Description

l,482,352 Jan' 29 1924 c. F. -DAUSMANN PRINTING PRESS Original Filed Aug. 1919 2 Sheets-Sheet 1 5 nnen/Coz CZQVZeS Fa. M7770 7711 Jan. 29,/1924. y1,482,352

c. F. DAUSMANN PRINTING PRESS Original Filed Aug. 6, 1919 2 Sheets-Sheet 2 Charles Fm/ma/m gn f5 @Hom/w13 Patented Jan. 29, 1924..

CHARLES F. -DAUSMANIL OF BROOKLYN, NEW YORK, ASSIGNOB, TO THE PBISTONE CO., INC., OFN'EWT` YORK, N. Y.,

A. CORPORATION OF NEW YORK.

' Parimenti P.

apiiucauon inea august e, 1919, semi No. surcos. jae'newea February 7,1921. se-rial no. Maase To all lwhom t vmii/y concern:

Be it known .that I, CHARLES F. DAUS- MANN, a citizen of the` United States, anda 'resident ofthe borough of Brooklyn, county of Queens, city and State of New York, have invented certain newl and useful Improvements in Printin Presses, of which the following is a speci cation.

The present invention relates to improv ments in printing presses, and particularly printing presses intended especiall for rotary gravure color printing. An obJect of the invention is to provide in such a press, means for accurately maintaining the register of colors between the prints, such means being adjustable so as to enable the impart ing of several colors upon the paper or web passing through the press in such manner.

that t e colors will be precisely, superiinposed. To this end I propose to provide in the present embodiment of my invention, a plurality of spaced print and impression .rollers adapted respectively to impart a single color to the paper or web and between these a color registering blanket continuously lmoving with the web and adapted to tension the same, and-more particularly I propose to provide for such a b anket a support of brass or other suitable material, of convex shape constantly moving the blanket over the same under pressure, the friction between the support and the rubber inducing static electricity in the rubber for the purpose of attracting to the blanket the paper or web passing over the same so that the web will cling to the blanket and the direction of the web through the press will thereby be maintained and guided so thatthe printed portions will not shift as they move from one printing roller @9 to another. A further object of the invention is to enable the release of the impression rollers and the blankets so that the tension upon the web will be relieved andthe inserting of a new web in; the press will' be facilitated. I further propose to provide means for' simultaneously,by a single manual operation, releasing all of the blankets andimpression ro1lerseither of one printing couple or of two'in the case of printing on both '50 sides of a sheet.

With, these and other objects in view, an embodiment of my invention is shown in the accompanying drawings, and this embodiment will be hereinafter more fully described I with reference thereto and theinvention will be nally pointed out inthe claims( In the accompanying drawin Fig. 1 is a side elevation of a printing press showing one embodiment of m invention incorporated therein, certain we l known arts of the press being omitted for the 'sa e of clearness;

Fig. 2 is an end View of the' blanket and support;

Y' Fig. 3 is a front elevation thereof; and Fig. 4 is a detail front view of the impression roller throw-off mechanism.

Similar reference characters indicate corresponding parts throughout the several figures of the drawin Referring to the drawings, and more particularly to Fig. 1 thereof, the press shown therein, com rises two side sup orts or standards 10 aving a plurality o stepped horizontal shelf ortions 11, 12 and 13 upon which are slidably mounted the bearin s 14 in which the ends of the shafts 15 o the .printing cylinders'lj are journaled. In the present disclosure I have shown three print- 'ing sets adapted successively to impart 'three colors in su erimposed relation upon the web A passing t rough the press. lThis is merely for illustrative purposes however, and two,

four or any desired number of printing sets may be provided as will be understood.

pon the inner sides of the standards 10 and at one side of the printing cylinder there are secured slide bearing gibs 17 and 18 in which block members 19 are slidable, said block lmembers having cast thereon bearings 19fin which are joiirnaled the ends ofV the shaft 20 of an impression roller 2l which bears upon the printing cylinder. The printing cylinder, it will be understood, is preferably of copper and has an etched intaglio printing surface, the impression roller cooperating therewith having a rubber covering yieldingly engaging the same. Ink is supplied to the printing cylinder by means of an inking roller 16n rotating in an ink reservoir 16".

The bearing 19tl extends into a secondary bearing portion 22 in which is journaled the shaft 23 over which one endoi the continuous blanket 24 passes, the other end'passing over a shaft 25, the blanket extending from the IDB vso

ass between the im ression and printing cylmder of one set to t e pass of the impression and printing cylinder of the next set.

The shaft 15 of the printing cylinder of each set is lprovided at its end with a Agear 26 which nies es with the spur teeth of a combinedl spur and beveled gear 27 journaled upon a stud shaft 'engaged by a series of beveled, pinions 29 mounted upon a shaft 30 journaled in bearings 31 and extending uprightly of the standard 10 at one side, the said shaft being drivenaf'rom'the lowermost combined spur and beveled ear Vwhich in turn is driven by the beveled pinion 32 ofthe horizontal driving shaft 33, Thus the printing cylinders are simultaneously and equally driven.

Thev spur teeth of the combined spur and beveled gear 27 are engaged by a pinion car 34 rovidedupon the outer end of a shaft 35 )ouriialed in the standard 10, the other end of the said shaft being provided with a pinion lgear 36 meshin with a pinion gear 37provi ed upon a stu shaft 38 and upon whlch shaft 38 there is provided-a sprocket gear 39 connected by a sprocket chain 40 with a sprocket gear 41 mounted upon the end of the shaft 23 of the blanket, this transmission adapted to continuously move the blanket in the direction of movement of the web and at the same speed therewith through the press. p

Upon the inner end faces of the standards there are mounted brackets 42 extending between the standards and having at cach end cylindrical passages 42n in which are slidably mounted nuts or blocks 43 through which are threaded sc1ews44 connected at one end to the slide bearin other ends with and wheels 45. Upon parallel shafts 46 and 47 extending between the upstanding end portions 42b of the brackets,

there are provided cams 48 and`49, the outer face portion 50 of the nut 43 bein held constantlyin engagement withthe sai cams by means of springs 51 and 52, disposed in sockets ,51 and 52 formed in the brackets above and below the assages 42, the said springs being adjusta le as to tension by means of set screws 51b and 52". The said cams are provided with concentricportions of greatest distance from the axis of rotation, the said portions when engaged with the face portions 50 of the nut adapted to hold the impression roller in a predetermined constant position at any point of the enga ment of said concentric portions with Said ace portions. Intermesliing pinions 53 and 54 are provided upon the respective shafts 46 and 47 and the lower shaft 47 has mounted thereon an arm 55 which, upon being raised, will through the rotation of the shafts 47, turn the cams 48 and 49 so that the springs 51 and 52 force the nut 43 carrying the screw 44 outwardly 28, the beveled teeth being 19 and provided at theirv of engagement with the printin cylinder, the u per end of :the b anket eing also move outwardly by this operation, the lower end being also moved at the same time by means that will be presently more fully described.

The respective arms 55 of the printing sets are connected by a rod 56 so that movement of one of the arms-will cause corresponding movement of the other and the throw-oil of allof the impression rollers will be simultaneous and equal. Thel lowermost arm 55 is connected by a rod 57 to an arm 58 provided upon the shaft 59 of a segment gear 60 which meshes with a pinion 61 provided upon the shaft 62 of a gear 63, a pinion 64 provided upon a shaft 65 mounted in a bracket 66 meshing with the gear 63, a handle 67 being provided upon the shaft 65. By

turning the handle 67, the train of gears 64, 63, 61` and 60 will swing the arm 58 upwardly thereby raising vthe rod 57 and the rod 56, causing the arms 55 to be swung and the cams 48 and 49 to be turned to release the impression roller.

The blanket is pivotally connected at 68 to a pressure screw 69 having its threaded portion extending through the plane bore of a poppet head 70 pivotally supported at 71 upon an arm 72 mounted upon a shaft 73 journaled in brackets 74, a lever 75 rovided upon the shaft 73 having its slotte end 76 engaging a pin77 of the connection rody 56.

A spring 78 is disposed on the screw. be-V yieldingly iolds the blanket in engagement with the web. A hand nut 80 engages the threaded end Vof the pressure screw 69 and is normally spaced from the poppet head. Turning of the hand nut 80 regulates the space between the mit and the poppet head. Upon movement of the rod 56,`the lever 75 is swung upwardly thereby moving the head 7() outwar ly, lirst releasing the tension upon the spring 78 and upon engagement with the nut 80 disengages the blanket from the web, this movement being simultaneous and substantially equal to the movement of the impression roller away from the printing cylinder. By'turning the hand nut against the poppet head, tension on the web may be released as desired.

The press so tar described is adapted for the printing upon one side of a web of paper. Upon occasion the paper is printed upon both sides by a continuous process which consists in providing in opposed relation to one press a similar press from which the web is carried in such manner that the unprinted surface of the paper issuing from one press is printed in the other press, and I have indicated at B a small portion of an- Maaate.

other press arranged in this relation. Upon the shafts 47 of the two presses there are provided respectively a downwardly exten ing arm 81 and an upwardly extending arm 81" vconnected by means of a connection rod 82 tion the rod 57 of one press is disconnected.

The lowermost blan et' not being' above the pass of a printing set, is not swung outwardly at its lower end upon operation of the rod 56, but is independently provided with a pressure screw 69, a spring 78*a being provided thereon, which is adjustable as to tension by a hand nut a pivotally supaorted in a bracket 80".

-rounded at their ends and connected at their ends by means of the shafts 23 and 25, the said shafts having mounted thereon adjacent the side plates and 91 and outwardly thereof, anged bushings 92, the flanges en-` gagin'g the plates at their outer sides, and upon the shafts adjacent the inner sides of the plates there are provided sleeves 93 and 94 upon which are mounted the respective cylindrical rollers 9 5 and 96 over which a continuous covering 9.7 of rubber passes, and which I will hereinafter refer tol as the blanket. The portion of the blanket engaging the web is supported at its under side by means of a plate 98 of brass or other suitable material, this plate being mounted upon bars 99, and 101 connected at their ends to the side plates 90 and 91. The plate 98 is longi- 'tudinally convexed. this being brought about by projecting the bar 100 forwardly of the bars 99 and'101 so that the highest point of the convexity is longitudinally in the center of the blanket.l As theA blanketmoves over the brass support. static electricity is set up in the rubber which attracts to the blanket the paper web passing over the same so that the web is caused to cling to the blanket and is thereby 'guided in its travel from one of the printing sets to the other, and the colors imparted by the different sets are caused to 'accurately register in superimposed relation with each ot er due to the absence of any shifting of the web. The blanket is wider than the full width of the web passing' over the same. l

Any slack in the blanket may be taken up by means of an adjustable roller 102 over which the blanket passes at the rear, the said roller havingr its shaft 103 journaled in blocks 104 slidable in the cut-outs 105 of brackets 106- secured to the side slots, and adapted to be adjusted by set screws 107.

Steam pipes 108 extend between the side supports and heat ther blanket support and blanket, thereby dr ing-the paper as it passes over the bla et.

1th my .improvements any desired ten? sion may be produced upon the web between the planting sets and by adjusting this tension 'to the desired degree, the colors ma be made to register with precision, the a hesion of the web and the blanket caused s by the production of static electricity in the b anket preventing any displacement of the web. The impression rollers and the blankets may be slmultaneously .released from the web with facility. I.

I have illustrated and described a preferred and satisfactory embodiment `of my invention but it is obvious that changes may be made thereln within the spiritand scope thereof as defined I claim:

1. In a multicolor press, -mechanism for maintaining registration of a web between spaced printing couples including a blanket yieldingly urged against one side of the web, and means for moving the blanket.

2. In a multicolor press, rweb re istering mechanism' including a support o convex shape and a `blanket movable u' on vthe convex support whereby static erlectrieity is induced in the blanket structure, a part ot the moving blanket bein disposed iin juxtaposition to the web w ereby the web is subjected to the-'influence of the static electriclty and caused to cling to the blanket surface, thereby guiding the web in its movement between spaced color printing couples of the press.

3. In a multicolor press, spaced sets of print ,and impression rollers, a movable blanket sup orted between the spaced printing sets anal) having a part thereof disposed in juxtaposition to the web extending between the printing sets, means acting upon the blanket to engage the same with the unprinted side of the web whereby the web is placed under tension; and. mfea-ns for moving the blanket.

4. In a multicolor press, web registering means including a plate extending the full width of the web, said late having a convex surface longitudina ly of the web with its highest point at the central `region ot the plate, an endless blanket movable over andupon the convex surface of the plate` and means for urging said plate and blanket towards the web to frictionally enga-ge the blanket with one side of the web,

5. In a multicolor press, web registering means including a blanket support having a convex surface opposed to the web, a blanket movable over and in contact with said convex surface of the support whereby in the appended claims.

of the blanket whereby the web is guided between the spaced printing couples of the press, and means for adjusting the blanket I to Yregulate its frictional pressure .upon the convex surface of the support. Y

6. In a multicolor press having a plurality of print and impression rollers, a relatively long and wide member between prints pressed against the web to place it under tension and' engaging the same at the unprinted side thereof along the major portionv of its surface between prints, and

yieldablymaintain it under tension to register-colors.

'7. Ina multicolor presshaving a plurality of print and impression rollers, a relatively long and- Wide blanket between prints pressed against the web to place it under tension to maintain it under tension to register colors and engaging the same at the unprinted side thereof along the major portion of its surface between prints.

8. In a multicolor press, means for maintaining registers of colors between prints consisting of a relativev long andv wide blanket yieldably presse against the web and engaging the same at the unprinted side thereof along the major portion of its surface between prints.

9. In a multicolor` press, a plurality of printing couples, each comprising a printing and an impression roller, a relatively long and wide blanket interposed between the printing couples and Aengaging the web along the major portion of its surface be tween the printing couples, means for pressing the blanket yieldably against the web, and means for operating the blanket to move the web between the printing couples.

' l0. In a multicolor press, a plurality of )rinting couples, each comprising a printing and an impression roller, and mechanism for moving the web between the printing couples comprising a blanket engaging the web and a support for the blanket, and means for pressing the blanket against the web to cause the web to cling to the blanket with suiiicient power to prevent relative movement between the blanket and .the aligned portions of the web.

11. In a multicolor press, a plurality of printing couples, each com rising a printing and an impression ro ler, and means for registering the web with the printing couples including traction devices for inducing static electricity to cause the web to cling to said means.

12. In a multicolor press, a plurality of printing couples, each comprising a printing and an impression roller, and mechanism between the printing couples, Ameans for operatingthe blanket, and means for yieldably pressing the blanket against the web, said mechanism being constructed to cause the web to cling to the blanket with sufficient strength to prevent relative movement between the blanket and the aligned portions of the web.

13. Means for maintaining registration of a web with a printing surface comprising a friction surface movable with the web, a stationary part., and means on one side of said friction surface frictionally coacting with said stationary part to induce an electrostatic charge on the friction surface, said charge exerting an attractive influence on the web to hold the same in close contact with the friction surface for movement as a unit therewith.

14. Means forregistering a web with a printing surface, comprising .a fixed part,

a flexible member frictionally engaging said fixed. part to induce an electrostatic charge, and a surface of high frictional material carried by said member and opposed to4 the web whereby said web is drawn by the .attractive influence of the electrostatic charge into close contact with said surface for movement as a unit therewith.

15. In combination with a printing press lhaving a plurality of spaced printing sets, means arranged in the spaces between the printing sets for producin electrostatic charges and co-operating wit the opposed section ofthe paper web extending between the printing sets to accurately register the web with the printing surfaces, and means for simultaneously relieving the spaced sections of the web from the influence of the electrostatic charges. v

16. In combination with a printing press having a plurality of spaced printing sets, means arranged in the spaces between the printing sets for producing electrostatic charges and cooperating with the opposed section of the paper web extending between the printing sets to accurately register the web with the printing surfaces, and means for simultaneously shifting all of the electrostatic charge producing means bodily with respect to the web to relieve the latter from the influence of the electrostatic charges.

17. In combination with a printing press having a plurality of vertically spaced printing couples, means arranged in the spaces between said printing couples for producing electrostatic charges and co-operating with the opposed sections of the web extending between the printing couples to register the web with the printing surfaces and means for simultaneously relieving the acting by their attractive influence over sublo stantlally the entire area of the sections of paper web extending between the printing couples to maintain Lregister of the web with the printing cylinders.

In testimony that I claim the foregoing l5 as my invention, I have signed my name hereunder.

CHARLES F. DAUSMANN.

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