US1148470A - Printing-press. - Google Patents

Description

T. WENSEL. Humm@ PRESS.'

APPLICATION FILED Jimi 24, 15H2.

-I. WENSEL.

PRNTING PRESS.

APPLICATION FILED JU NE24. w12

Pate-med J '111)' 2T, i915.

Lmsm,

6 SHEETS-SHEET 5.

T. WENSEL.

` PR'INTING PRESS.

APPLICATION FILED JUNE 24, 1.912. 1,148,470. Patented July 27, 1915.

6 SHEETS-SHEET 6.

fz. (xvii-for:

rvr i Tiri-rei. i einer@ Hit/itt TEGDGR NENSEL DF JULIET, LLNOIS.

Specification of Letters Patent. l

.ijattented Judy 27, i915.

The object ou my inventionis to provide a printing` press Wherewith more nr'tistic prints can loe obtained from a. given plate than is possible with the printing presses hitherto devised.

A further object of my invention is to provide a printing press for carrying out 'he improvements in the process of printing` ivl'iich'are described and claimed my companionapplication filed of even date herewith entitled Process of producing illustrations, Serial No; 705,67Q.

lily invention consists generally l in a printing press having a recii'nocatingtype carrying lied, a transfer cyiinder mounted Jfor rotation over the hed, means for lowering and raising .saine to ci'intact and to free the type, an impression cyiinder operating in unison with the transfer cylinder, and ineens ,tor moving the impression cylinder to and lrom the transfer cyJnder.

ii'y n'ivention consists 'further in ,printing press having; a reciprocatingtype 'cedy a two revolution impression cylinder mounted over the type bed, means for moving;- the transfer cylinder into ink selecting relation to the type and an impression cylthe transfer cylinder, andmeans for moving the 'impression cylinderfto and from the transfer cylinder forpurpose of feeding paper thereto under pressure.

My invention resides` 'further in a printing having; a ,reciprocating fiat type nel, a rubber covered u .floiatory suri'aced transfer oponder- :mos ted over the type bed, a rubber covered undulatory surfaced impression cyhnder operatively connected for rotation. with the transfer cylinder,l vmeans for depressing the transfer cylinder to contact the t vpe When moving in one diretion, means for moving the impression cylinder toward the transfer cylinder to present paper thereto under pressure, and means operating to retract the impression cyiinder and to raise the transfer cylinder.

My invention also resides in a printing press comprising a fiat reciprocating hed, a plate receiving portion thereof adapted for the adjustable arrangement of printing plates, means for inking the printing plates, a tivo-revolution transfer cylinder mounted over the type bed, means for pressing the transfer cylinder against the type as it moves in one direction, an impression c vlinder operatively connected to said transfer cylinder and having means for forcibly presenting paper to the transfer cylinder.

My invention consists further in the arrangementconstruction and combinationl of parts whereby the aforenained objects as ivell as other objects which will hereinafter appear are attained. It will he more readily understood by reference to the accompanyy ing drawings which illustrate a preferred embodiment thereoic and in which: y

Figures i and la read together represent a side eievation of a printing press embodying my invention; Fig. 2 is a side elevation of that portion of the machine Which earries the printing cylinders viewed from the side opposite'to that shown in Figs. l and 3"'5 certain @fearing and other parts being removed to disclose the cylinder operating mechanism more clearly; Fig. 3 is a vertical cross section viewed substantially from the iines 3 8 of Figs. l and 2; Fig. 4 is a top plan view of the printing cylinders and a portion of the type leed; and Figs. 5 'to 8, inciusive. are diagrammatic views depicting;` diii'erent relative positions of the type hed, transfer cylinder, and impression cylinder. The class of printing press upon which my invention is an improvement is known as dat hed printing presses. it derives VAits name from the type bed, which is fiat and on which the type form or printing plates are arranged. In such presses a single im; pression cylinder is mounted vover the leed and it feeds paper to the type the type moves in one direction and then rises to permit free return. of the type A prnt'is les thereby made for every reciprocation of the Itype bed or for every other revolution of the impression cylinder. For this reason such presses are sometlmes known as two revoution presses,

r Now referring to the drawings I shalll f describe my invention which may also be termed a flat bed or two revolution press, 'because it has agilaft reciprocating bed upon which the printing plates are mounted and because it produces a print for every reciprocation of the type bed.

' But, as will appear more fully hereinafter,

I` provide two cylinders instead of one, and I do not press the paper against the vtype as is done in the flat bed presses now in .fvide mechanism for producing illustrations superstructure a of the press-frame which:

general use.l Thelat bed 2 comprises a llowerA portion 2 upon which the type or printing plates 3 are mounted and a raised portion 4, which is type high and which serves as an ink cnveyer. The ink conveyer ireceives-"ink from. a fountain and rolls 5 'fatvthe forward end and carries it to disfrom the printing plates 3 which shall be better than prints which can be made from likeplates by presses hitherto devised. My

press is particularly designed for producing artistic prints; but it can be used advantageously to reproduce ordinary type matter;`

For thepurpose of making printsl from the plate 3 I provide a lower cylinder 10 and an upper cylinder 20. They are mounted for rotation in sliding journal boxes 11 and 21,

respectively', by means of journals 12 and 22. The sliding boxes are carried in the comprises a series of standards al, a2 and a3 on each side thereof. The lower cylinder 10, which I shall call the transfer cylinder is suitably driven by mechanism hereinafter described, so that it makes two revolutions for every reciprocation of the type bed. It carries a gear 13, which meshes with a similar gear 23 onthe upper cylinder'20,

hereinafter to be called the impression cylinder and thereby drives it at the same speed, z'. e., two revolutions for each recipro# cation of the type' bed. K Means which I.

shall later describe in detail are provided for lowering the transfer roll into contact with the type for the purpose of making an impression in ink on the transfer roll, and other means are provided for feeding paper at the proper time to tthe inked transfer force the paperagainst the transfer cylinder with pressure suicienty to transfer the ink to the paper. For raising andlowering the transfer cylinder, a pair of vertical draw rods 11a is provided on each side of the press. They extend from the lower part of the frameto the top of the transfer cylinder box, `andthe upper portions 11", which enter the box, are reduced to provide shoulders 11b. Thus by means of nuts arranged at the threaded ends of the rods the box parts are secured together. The lower ends of the rods are tied together by a cross bar or strap 113 which is adjustably securedthereto by lock nuts 11. It is obvious that by depressing the strap 113, which is secured to the rods 11, the box 11 carrying the. transfer cylinder willv be lowered. For this purpose 'eccentrics 11d are providedwhich are mounted upon a cross shaft 11e, and since it is necessary to lower the cylinder at a definite time, a suitably constructed cam 11t is provided for rocking the eccentric shaft 11. The cam 11t is driven from the 'pinion 11. on the main power shaft llh'of the machine, which power shaft is driven from any suit,-

able source of power, such as the belt vand pulley 11. As it is desirable tov prevent the transfer cyllnder` at certain times fromcontacting the,w printing plates as they move thereunder,as, for instance, when the press.

is being made ready, suitable means are interposed between'the cam 11t and the eccentricshaft 11 to interrupt the regular operation thereof. It comprises a latch 11J which normally engages a lug 11 fixed to the eccentric shaft 11, so that as the latch 111 is movedback and forth by the cam the eccentric shaft is rocked. To interru t the regular operation the latch 111 is raise from engagement with the lugllk by meansof a lever 114.-l The lever 114 is mountednpon a rock shaft llmgwhich is operated by a foot' lever 11ls arranged in position convenient to the pressman when feeding. The operative connection between the foot lever and rockv shaft consists of a bell crank 11b, link 111 and lever 118. Therefore to prevent the depression of the transfer cylinder during regular operation ofbed it is but necessary to press the foot lever 115. The mechanism thus far described is for the purpose only of lowering or -depressing the'cylinder and forthe purpose of raising the .same and holdm it up when raised other O5' cylinder.' The impression cylinder serves te Having deseribedmeans for raising and maestre lowering the transfer cylinder, l shall now describe the means for moving the impression cylinder to and from the transfer cyly inder. lt will be noticed that l'. have mount ed the boxes 2l of the impression cylinder at an angle of substantially l do this for several reasons, one of which is that it brings the impression cylinder at a more convenient height than it would to place it directly above the transfer cylinder and at the same time it allows sufficient space for access to the type bed vbelow it. Another reason for arranging it in this manner is that movement back and forth along a single line serves to Contact it with the transfer cylinder when down, and when pulled away raises it up sufficiently to pick up the paper, when feeding, in the best manner. For the purpose of lowering the impression cylinder l provide pairs of shouldered draw rods 21awhich extend through the boxes 2. A cross strap 2lb is adjustably secured to the free ends of the rods 2l? and an eccentric 21d mounted on astud shaft 21 serves to depress the strap and the box carrying the impression cylinder therewith. Since Ythe impression cylinder must also be timed with the bed and transfer cylinder, provide a suitably designed cam 2le for operating the eccentric shaft 21. lt contains acam groove Qlf into which a cam roller on the lever 21 enters. The cam 2l@ is mounted on the shaft 'i'if which carries the cam il", but is arranged at the opposite side of the machine. A cross shaft 21g etending from side to side of the press is rocked from the cam 2lc through levers Zik and 2li. t is provided on each side with arms 21' which,

.through the medium of connecting rods 2l 'Y and. rock arms 21D on the stud shaft Q1, ser/ve to communicate the rocking motion of the cross shaft 21g to the eccentrics 21d and thereby depress the impression cylinder. rlhe impression cylinder is raised and maintained in a raised position by strong springs 2F which are interposed between the lower side of the split box 21, and an adjustable plate 21S through which the draw renat freely slide. ln order that the movement of the impression cylinder may be accurately regulated, an adjustable block 2P is provided for regulating the throwof the arm 21X, and consequently the movement of the cylinder actu ating eccentrics. The move-- mentof the cylinder may also be regulated by the right and/left threaded connecting rods 21". lvllhile y the impression cylinder and the transfer cylinder are moved from one another, their gears 13 ,and 2? are always in mesh, the amount of separation required being so slight that this can be safely accomplished.` The lower or transfer cylinder is driven through atrain of gea-ring 10a from the power shaft lh. The type eed 2 is also driven from the4 power sha-ft .tik

through gearing 2b and 2. @ne of the gears il engages a rack Qd arranged on the lower side of the type bed to drive the same in one direction and they are shifted by means not shown) to the ther with a lower rack 2@ to drive it in vthe opposite direction. Printing-press-bed reciprocating mechanism is so well known that a detailed description of it is deemed unnecessary.

lt is desirable at times to prevent the impression cylinder from contacting the transfer cylinder as when the press is being made ready or when the pressman misses feeding a sheet. Forthis purpose l provide an arm Qlp on the rock shaft 11m which carries a roller engaging the connecting link 21k. t will be noticed that the operative connection between the arm 2li and the link E211? is by a sl otfandpin connection 21N. Thus when the shaft 11m rocked by foot lever the arm 2l? swings upward and raises the end of the vlever so that the slot is free of the pin.

r:the lever then moves back and forth without rocking the shaft. t obviousv that the impression `cylinder will remain in its upper position being so held by the springs 21T. To establish regular operation the lever 21k is merely lowered to engage the pin on the arm 2li.

Having thus described the general operation of the machine, l shall new describe the operation, relative movements of the parts, and their unique cooperation, more in detail. This can be best done by reference to the diagrammatic views (Figs. 5 to 8 inclusive). lfig. 5 shows the type bed in the extreme rear position starting forward; Fig. (5 shows the type bed partially under the transfer cylinder with the transfer cylinder contacting the type; at which time the impression cylinder has picked up the paper. 7 shows the type-bed still transferring ink to the transfer cylinder and the impression cylinder pressing the paper aga-inst the inked transfer cylinder; and Fig. 8.

illustra tes the type-bed returning to the rear position and shows the transfer cylinder raised therefrom and the impression cylinder discharging the printed sheet.

ln high-grade art printing no amount of labor and skill are spared in producing the best possible results. Consider, for instance, the production of illustrations from a half tone plate used in ordinary commercial. work. 'luch a plate is often defective in tone, shading or form, and hence the reproductions struck therefrom are also defective. Even though the half tone plate be an exceptionally goed one the practical difhculties encountered in producing prints therefrom by pfesses hitherto devised require great skill and ingenuity to retain the goed qualities of the plate in the print. Further, in many instances it is impossible to print from half tone plates on. certain lfurt er, to do this with little labor. I s A.

able tol print on rough or matted stock Wim. as much ease as upon calendered steelt. When necessary I modify or change certain tone values of the plate in order that such y tone, shading and form may be produced in the print as to effect an extremely artistic print. A more full and complete description of the ina-nner ofaccomplishing this is given in my ccmpanion application filed of even date herewith entitled Process of producing illustrations. Sutlice it to say here that to secure this eect it is necessary to move the transfer cylinder accurately into the ink on the printing plates to pick up only so much as is necessary to approximate the desd'red etl'ect in the print and to press the paper, by means of the impression cylinder, against the transfer cylinder with proper distributed pressure to select from the transfer cylinder just the proper amount of ink in the proper place. rIhus in the shadows greater pressure is required than in the high lights .in order that the proper amount of ink may be transferred from the plate to these parts. Practically, it'is impossible to produce such Variable pressure between the paper and printing plate as to pick up exactly the amount of ink required upon the different parts of the print to effeet an artistic picture. I-Ience presses hitherto designed are defective for this reason, and so I provide mechanism Whereby a variable or inlr selective relation is sccurcd between the transfer cylinder and the type a selective pressure between \the paper and the transfer cylinder. In this manueel ani able to select as near as possible so much of the ink from the printing plate and transfer it to the transfer cylinder as is necessary to approximate the distribution of ink desired in the resulting print, and then further to select much of the ink from the transfer cylinder to effect just the desired distribution of ink in the finished print. "ihe movement of the transfer cylinder into the ink of the printing plates shall be termed, moving the transfer cylinder into ink selecting relation to the printing; plates. The variable pressure which is secured between the paper and transfer cylinder. sliall be hereinafter referred to as selective pressure. v

The transfer cylinder 1.0 comprises cnd portions or rolling surface 30 and an intermediate depressed portion 31. The end portions 30 are type high, that is, they are macero in. the same plane as 'the top of the type when the cylinder contacts the bearing parts 40 of the type frame. It is therefore necessary to build up the intermediate portion to typevheight. For this purpose I stretch several layers of make-ready paper over the cylinder. This I suitably secure at one end 3.2 to the cylinder and at the other end attach it. to paper reels 33. Over the paperIstretch a sheet of thin yielding and compressible material 35 which brings the intermediate portion to type height. lA good grade of dental rubber serves Well for this purpose, but other suitable yielding material may be used. Hence the term rubber as here used shall be construed in broad sense of any sui-table yielding material. I interpose relief plates or undulators 36 between the rubber 35 and the malte-ready paper. These are made with relief surfaces Where the rela-tively heavier tones of the picture are to appear and with depressed portions Where the lighter tones are to appear. It Will be obvious that stretching the rubber over these n relief plates will cause it to conform sub- 'stanti ally to the undulations thereof.

When the transfer cylinder is brought into contact with the ink of the printing plates, the selective action therebetween will correspond or be proportionate to the undulations of the relief plate. lFurther1 since the relief plate is separated from the print-` Y/ing plate merely by a thin single sheet of rubber, I am able accurately to control the placing of the relief plates so that they will` meet the printing plate just Where necessary to select the proper amount ofink. Since ink more readily adheres to rubber than it does to paper, I am able to transfer the :ink with less pressure than is necessary in the flat bed presses now generally used wherein ,the ink is transferred from the printing plate directly to paper. l/Vhile in some in stances, I am able to select the ink from the printingv plate so accurately that further selection is unnecessary, I can generally improve the same by again selecting the ink from the transfer roll. This I do by pressing paper against the impression cylinder, lWith .pressure of different predetermined intensity throughout different areas. The inipression cylinder also has bearing portions 410 and intermediate depressed portion di. The depressed portion il has several sheets make-ready paper stretched thereover, paper reels 42 being provided properly to stretch the same. This cylinder is covivith a rubber blanket 43, rigidly secured at one end 4 7, and attached at the other end to a reel 48 whereby same can be tightly stretched. Relief plates or undulators 50 are interposed between the rubber and the paper, being usually pasted to the malte-,ready paper, They are arranged to register with the undulators 36 of the transnie-aero fer cylinder. '.llie plates 50 are slightly dii?- ferent in form from the plates 36, the relief surface thereof departing therefrom in man- :ner necessary to increase, maintain or reduce vThe type loed carrying the printing-plate moves from the frontposition (shown in Figs. l, 2. and toward the rearI and in so doing the printing plates are inked. As the printing plates approach the transfer cylin der, it is lowered'to Contact therewith as shown in 6.' The impression cylinder carries paper-feeding mechanism 607 the linger 6l of which operates to pick up a sheet of paper as it passes the feeding-board 62. The impression cylinder carryingthe paper is then brought into Contact with the inked transfer cylinder as shown in Fig. 7. After all of the -inked surface of the transfer cylinder has passed the transfer point the im pression cylinder is slightly raised; the sheet at this time is discharging as shown in Fig. 8. The transfer cylinder is also raised to permit the type heil to return with out contacting it.

l do not limit myself to the specific construction herein shown anddescrilaed.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:v

l. A printing press hai/ing a .reciprocating type hed, in combination with a transiter cylinder mounted over said hed, means automatically operable for raising and lowering 'said transfer cylinder, an impression cylinder operatively connected. to and rotating with said'transfer cylinder7 and automati cally-'operable means for moving the impression cylinder to vand irom the transfer cyl inder.

lulatory surfaced transfer cylinder mounted over said type bed, an undulatory sui-:faced impression cylinder operatively connected to rotate with said transfer cylinder, in combination with automatically operable means for raising and lowering the transfer cylin- .orniing a variable height relief surface Iiler.:ilounlml over der to'contact the type analyte clear and automatically operable means for mov ing` the impression cylinder to and :from the transfery cylinder.

e. in a printing lpress of the clase de scribeda the combination. of a 'reciprocating flat type bed7 a transfer cylinder mounted. over said type bed, a'ruhloer sheet .stretched over the transfer cylindery ineens interposed.

between the` rubber sheet and 'the cylinder thereoia'an impression cylinder operatively connected to rotate with transfer cylinder, means for contacting the transfer cylinder with. the inked typej and automatically operable means for contacting the impression cylinclcrivith the transfer cylinder, as and for the purpose specitled.

5. .in printingl press oi the class described, the combination of a reciprocating list type 'beds transfer cylinder mounted vover said type hed, a rubber coveringv stretched over the transfer cylinder, means interposed between thefruoloer covering and the cylinder forming,` a variable height relief surface thereof, an impression cylinder op erativcly connected to rotate with the trans e for cylinder,l a rubber covering stretched. over the impression cylinder, means inter posed between the rubber and the cylinder, automatically o'peralile means for pressing the transfer cylinder against the type and .automatically operable .means for pression@u the impression cylinder against the transfer cylinder.

il.. ln a printing press of the class mein tionefl, thewombiuation of a reciprocating type lied. a two revolution transfer cylinder mounted Atliereofver, a rubber covering stretched on said transfer :yiinfler, means interposed :between the cylinder and tlic i'uolier for raising' portions thereof, in comliiuatiou with al two revolution impression cylinder operatively connected to said transler cylinder, incanslor depressing the transier cylinder o talco ink, and means for pre seating; paper vto the transfer cylinder under selectivepressure. l Y

7. ln a printing press oli the class. uientioncil. a llat type lied2 menus lor reciprocating-r il. a yielding surface trausim' cylintypo limit incur for 1ola,in;;-tiie uc tw. f tor every reciprocatiou ole liuc. L ".f'pciieil, a lilre rotating inipicsslou rylioili-,zhopcf'a'tml from salti' truns l'cr f-yliuclci. means l'or depressing tlictransl'ex' cylinder to contact the t i 3., and means im' .fnox'iielii'tle impression cy ruler to and from Llio transfer cylinder as and for the purposespcoilicfl .1%. lu a printing press of llic'clas-:s lcscriiwil a flat type lied.; means for reciproialiug it, a, transfer cylinder' iziouoted thereovci'. means loz' rotating same twice for every x'ccii-iiocation of the type bed, lille latory impression cylinder l slidingl boxes,

cylinder for raising certain portions there'- of, means for lowering the transfer cylinder, and means for moving the impression 1 cylinder to and from the transfer cylinder. 9. In a printing press ofthe class de,- scribed, the combination of a reciprocating fiat type bed, an undulatory transfer cylinder mounted over said type bed, an undumounted over said type bed and operatively connected for rotation with said transfer cylinder, means for depressing the transfer cylinder to pick .up ink from the type when moving in one 20 d1rection,means for moving the impression cylinder toward the transfer cylinder to present paper thereto, subsequent to a con' tact of the transfercylinder with the type, ,and means operable to raise the transfer 2,5 cylinder to permit the free return of the type bed.4 f 10. In a printingpress, lthe combination of a reciprocating type bed, a transfer cylinder mounted over the same in' vertically anv impression cylinder mounted lin diagonally sliding boxes and operatively connected tothe transfer cylinder, means operable to Contact the transfer cylinder with the type, means operabletoy contact the impression 'cylinder with the transfer cylinder subsequent `to its engagement with the type, mechanism operable'to l separate the imp ression cylinder from the transfer c linder, and mechanism operable 40 to raise t el transfer cylinder to clear the type when moving in one direction.

11. In a printing press of the class men.- 4 tioned, a reciprocating type bed, a transfer cylinder mounted above said type bed, pa er fastening and reeling means on said cy in der for stretching paper thereon, a plurality of relief members mounted on said paper to coincide with predetermined' portions of thev printing plates on the type bed, a yielding blanket over said relief member fixed at one end to the cylinder and wound u on a reel at the other end, an impressionlcy inder operatively connectedl to said ltransfer cylinder an ,means for automatically movin 5i said transfer cylinder'into engagement wit `the type and the impression cylinderjinto engagement with the transfer cylinder.

12. In a printing press of the class mentioned, a reciprocating type bed, a transfer e0 cylinder mounted above said type bed, par

fasteningand reeling means on said cyu der for .stretching paper thereon, a plu-2 rality of relief members mounted on said paper to coincide with predetermined tions of the printing plates onl the typeV toward the transfer cvlinder after the trans` 1 -fer cylinder, paperspick-up' mechanism on 4to retract same after printing period.-

.anic impression cylinder rotatabl f 'v ,with-.Seid .transfer cylinder, m vamllfn for a yielding-blanket over said relief member fixed at one end to-the cylinder and wound upon a reel at the other end, a .two-revolution impression cylinder operatively connected to said` l.transfer cylinder, and 'a blanket of yielding material stretched thereon and adapted for the interposition of` relief plates between it and the' cylinder.

13. In a printing press of the class mentioned, the combination of a reciprocatin type bed, a yieldingl undulatory blankete transfer cylinder mounted over said type' bed, mechanism operable to press the cylinder downward to contact the printingplate when moving in one direction, an impression cylinder geared to rotate with said transfer-cylinder, paper pick-up mechanism on said impression cylinder, mechanism operating .to move said impression`cylinder fer cylinder has taken ink from the printing plate. and after the impression cylinder has picked up the paper.

14. In a printing press of the class described, the combination of a flat reciprocating bed, adapted for adjustable arrangement of printing plates thereon, means for inking the printingplates, in combination with a yielding surfaced transfer cylinder mounted over said bed, mechanism operable to presses said transfer cylinder against the type as'i't movesA thereunder in one direction, a-yielding' surfaced impression cylinder operatively connected to rotate withl said trans 10o said impression cylinder, and mechanism operable to move the impression cylinder toward the transfer cylinderaftery the operation of said paper-pickmp mechanism and 15. In a printing press of the class mentioned, the combination of a reciprocatingl type bed,. a transfer cylinder rotatably mountedthereover, an impression c linde operatively connected to said trans er cyl-- inder, mechanism for raising and lowering' said transfer cylinder, mechanism for mov- M ing said im ression cylinder to and from the transfer cy inder and .mechanism operable to prevent depressionV of the'transfer cylin-4 115 der and movement of the impression cylinder towardY the transfer cylinder.

16. In av printing press, the combination of a. reciprocating type bed, an ink selectingl tj; fer. .'roll rotatably mounted thereovr, 120

ra e

moving vthe"transfer cylinder to and from that pe bed,` mechanism for moving the impression cylinder. to and from the transfer l 125' l cylinder-,Hand mechanism operableato throw outtransfer. and impression cylinder moyi'n .mechanism.y 172? afprinting p ress, the combination ofafreciprocating type-bed, an select-v 1 304 ineens() ing transfer roll rotatablymounted thereover, a selective pressure impression cylinder rotatably operable with said transfer eylin'den mechanism for moving the transfer cylinder to and from the type, hed, mechanismfor moving the impression cylinder to and from the transfer cylinder, and meclianism operable to throw out said transfer and impression cylinder moving mechanism.

18. In a printing press, the combination of a reciprocating flat type-bed, a yielding and mechanismgoperableto prevent depres-v sionfof the transfer cylinder and movement of the impression cylinder to and from the transfer cylinder. L

1,9. In a printing press, the combination of a reciprocating flat type-bed, a yielding surfaced ink selecting transfer cylinder ro tatably mounted over said type bed, a yielding surfaced selective pressure impression cylinder rotatably mounted over said typei bed'and operatively connected to said. transfer cylinder, mechanism for raising and iowering the transfer cylinder, mechanism for moving the impression cylinder to and from the transfer cylinder, and mechanism operable toI prevent depression of the transfer cylinder and movement of the impression cylinder to and from.' the transfer cylin- A der.

In testimony whereof, l have hereunto set my hand, this 16th day of May, 1912, in

the presencev oftwo subscribing Witnesses.

y I vTHEODOR W-SEL.

Witnesses: l

ARTHURW. Mangels, Jenn R. Lrrrvnn.

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