US2300549A

US2300549A - Printing machine

Info

Publication number: US2300549A
Application number: US261480A
Authority: US
Inventors: William F Huck
Original assignee: R Hoe and Co Inc
Current assignee: R Hoe and Co Inc
Priority date: 1939-03-13
Filing date: 1939-03-13
Publication date: 1942-11-03
Anticipated expiration: 1959-11-03

Description

Nov. 3, 1942. w. F. HUCK PRINTING MACHINE 6 SheetsSheat 1 IN VENTOR I V/W/am F Hue/Q.

Filed March 13. 1939 NQV. 3, 1942. HUK I 2,300,549

PRINTING MACHINE Filed March 13. 1939 6 Sheets-Sheet 2 v INVENTOR 4477/0/27 EA uc/ ATTY NOV. 3, 1942. w, HUCK 2,300,549

- PRINTING MACHINE Filed March 15, 1939. 6 Sheets-Sheet s Nov. 3, 1942. HUCK 2,306,549

' PRINTING MACHINE Filed March 13, 1959 6 Sheets-Shem 4 INVENTOR mm'm 14/74/012.

Nov. 3, 1942. w, F, HucK PRINTING MACHINE 6 Sheets-Sheet 5 Filed March 13, 1939 NNN NN ."m A A f INVENTOR MY/ldm Huck Nov. 3', 1942. w. Fji-lucK PRINTING MACHINE 6 Sheets-Sheet 6 Filed March 13, 1939 INVE NTOR Mi/fiam E Hue Q.

ATTY

Patented Nov. 3, 1942 r UNITED raw TING MACHINE William F. Huck, Richmond Hill, N. Y;, Signor to R. Hoe & 00,, Inc., New York, N. Y., a corporation of New York I 4 Application March13, 1939, Serial No. 261,480 g This invention relates to rotary printing machines and more particularly to improvements in printing mechanism therefor. 1

The new and useful-features and principles of this invention are'especiallyapplicable to multithat figure and arrow;'

color offset .lithographic printing machines,

wherein fixed oil-tight bearingsare provided for the inkvdis'tributing cylinders, and wherein certers. As it is necessary, in such types of rotary printing machines, to occasionally separate, or trip the various cylinders and inking rollers, this invention contemplates as one of its principal objects, the provision of an improved" combined and selectively operable cylinder and ink roller tripping mechanism.

Another object of the invention is to provide in a printing machinean improved roller reciprocating mechanism.

Still another object is to provide an improved ductor roller mounting and an improved adjustable actuating mechanism therefor.

Further objects include the-provision of improved locking devices for roller socket screws and the provision of improved bearing mountings and supports for ink rollers.

It is also an objectgof this invention to pro- 'tain of the inking, rollers rotate about fixed cen- Q vide a rotary printing mechanism of generally,

rangement of parts, and in the details of construction hereinafter described'and claimed;

A preferred embodiment of the invention is illustrated in the accompanying drawings, wherein: v v m I Figure 1 is a diagrammatic illustration of a multi-color lithographic printing machine embodyingthe featuresand principles of this invention;

Figure 2 is a perspective view of several of the cooperating cylinders and .inking rollers of one l of the units of the machine shown in Figure 1, certain parts being broken away and others omitted for the sakeof clearness;

Figure 3 .is an elevation partly in section of .an

' nism shown in Figure 3 and taken'on line l of looking in-the direction of the V Figure 5 is a-broken line 5-5 01' Figureflt Figure 6 is an end view of certain parts shown in Figure 5; e, i

Figure 7- shows' a form cylinder and certain I ink rollers with their bearings'and cooperating mechanism in the relation indicated by the zigzag line |-'|-of Figure 8; v i

Figure 8 is a sectional view taken on line 8+8 of Figure'I; .1.

Figure 9 is aview similar to Figure 8 but show ing the parts in another position with the inking rollers in tripped position;

Figure 10- is ,an enlarged view partly- Figure 11- is an enlarged sectional view taken on line ll of Figure 8 Figure 12 is an enlarged face view of a portion of the tripping mechanism; I

Figure 13 is aside view of the parts shown in Figure 12; I I v Figure 14 is a sectional view taken on line H- l4ofFigure13; p

Figure 15 is a top plan view of another portion of thetripping mechanism and looking in. the direction of arrow IS in Figure16; and

Figure 16 is a sectional view taken on line l6-- l6 of Figure 15.

The printing machine diagrammatically shown in Figure 1 comprises aplurality of perfecting printing units 2|, arranged toprint simultane ously on both sides ofthe web 22 as it passes between the

cylinders

23 and 24 of each unit. The printing machine shown is of the type known as an ofiset perfecting press, but it is to be underprinting or blanket cylinders'and receive the impression to be printed upon the web 22 from form or plate'cylinders 25- and 26 respectively.

The

respectivecylinders

23, 24,25 and 26 are arranged to be driven from'a. shaft 2i,'which in turn is preferably driven by a motor 28 geared.

inking roller showing the reciprocating mechae 1 n'isrn' therefor, the view being. taken on line -3 of Figures 1 and 4 looking in the direction of the I I arrows Figure 4 is a new of the reciprocating mecha--- tothe shaft 21 by bevel gears29 and 3|. -The cylinder "23 i drivingly connected to the shaft 21' by means of a worm 32 and a worm-wheel 33 indicated diagrammatically in Figure l. The

cylinder 24 is driven from the cylinder 23 through gears and 35, the outer peripheries of these gearsratherithan theirpitch lines bein shown sectional view taken on insec; .tion taken on line Ill-40 of Figure8: v

driven'from the cylinder 28 by a gear 38 in mesh with the gear 34, and the cylinder 25 is driven from the cylinder 24 by a gear 31 in mesh with the gear 35.

Ink fountains

38 and 38 are provided and contain ink for the forms or plates on the

cylinders

25 and 25 respectively, each

fountain

38 and 38 having the usual rotating fountain roller 4| therein. A swingably mounted ductor roller 42 is provided to take ink from each of the fountain v rollers 4| and transfer it to a reciprocating ink .15 and its-adjustable connection with the arm 15 in the arcuate slot 11, the throw of the ductor roller 42 toward the ink roller 43 may be adjusted to vary the pressure of its engagement roller 43, whereover the ink is spread by a pair of rollers 44. The inkisthen transferred fromi the roller 43, through rollers 45 and 48-,to a pair of reciprocating

ink rollers

41 and 48, spaced apart about the

cylinders

25 and 25. I From each of the

rollers

41 and 48, the ink is carried to the plates on the

cylinders

25 and 28 by

ink form rollers

48 and 58.

Water fountains 5|: and52 are provided to supply moisture for the printing plates or forms,

each fountain having th usual rotatable fountain roller 53 therein. A swingable ductor roller 54 carries water from the fountain roller 53 to reciprocating .moisture rollers 55, wherefrom moisture is carried to and-distributed on the plates on the cylinders or 25 by form moistening rollers 55. v

As shown in Figure 7, the reciprocating ink 55 are arranged to be driven by means of suitable gearing from their associated

cylinders

25 or 25, through an idler gear 51 in mesh with the respective'gears and 31, andan idler gear pinion 58 rotatable with the gear 51' and in mesh with a gear 58 on one end of a shaft58 of the respective reciprocating ink or water roller.

to be swung in the same manner from the respec tive fountain rollers 4| and 53 to'the respective reciprocating inkand water rollers 43 and 55,

by means of a rotatable cam 5|, one of' which 3 Each of theswingable ductor rollers 42 and54 are arranged so rollers and moisture or

waterrollers

41, 48 and cams is shown in Figures 1 and 2, and it will be understood that similar operating mechanism is provided for the ductor rollers in the lower portion of each printing unit. "The earn 5| is arranged to be rotated from the shaft of the reable catch member 85 is pivoted to the frame member 51 and is adapted to be swung into the path of a lip 81 formed on the end of the arm 85 of the lever 13,'to hold the ductor roller 42 out of contact with the fountain roller 4 I The ductor roller 42 is rotatably supported in the arms 1| and 12 in a manner identical with the arrangement for supporting the form rollers 48 and 58-and hereinafter described. 1

The-mechanisms (see Figures [-7 inclusive), for reciprocating the ink and

water rollers

43, 41, 48 and 55 are substantially identical and include the gear 58 on one end of. the shaft 580i the respective roller, and the other end 88 of this shaft 58. The shaft end 88, as best shown in Figure-3, extends through the frame member 55, in which it is journaled to rotate on a fixed axis, and into an oil-tight casing 88. A worm gear 8| is secured to the shaft end -88 within the casing 88 and meshes with a worm gear wheel 82 having

hubs

83 and 84 journaled in the sides of the casing 88. The casing 88 is supported upon a reduced portion 85 of the 'end 88 of the roller shaft 58 and is reciprocated with the respective ink roller, being guided and prevented from rotatingwith the shaft by

rollers

85 and 81 pivotally supported on the casing and disposed to engage and ride one on either side of a bar 88, secured to and extending from the frame member 55. Both ends of the ink roller shaft. 68 are journaled in roller bearings 88 secured in the frame members 58 and 51 and are adapted to rotate as well as to slide axially therein. The worm-wheel 82 is provided with an eccentric bore adapted to receive a shaft I8I which is held ciprocating ink roller 41,- through an idler gear 52 which is in mesh with the gear 58 on the shaft of the roller 41, and a gear 53 on the shaft of the cam 5|, also in mesh with the gear 52.

The connection between the cam 8| and the '7 ductor roller 42 (see Figures 1 and 2), includes naled in one arm 12 of a lever 13, which issecuredj near the other end of the shaft 55. The other arm 14 of the lever 54 is connected by a link 15 to an arm 15 which has an arcuate slot 11 formed therein, the arc of the slot 11 being concentric to the pivotal point of the link 15on the arm 14 when the ductor roller 42 is in engagement with the fountainroller 4|.. The link 15 is adjustably connected to the arm 15 by means of a clamp screw 18 slidable in the slot 11. The arm 15 is againstaxial movement therein by means of a pin I82 passing through the hub 84 and engaging a groove I83 inthe shaft I8I to permit relative rotation between the shaft I8I and the wormwheel 82. The shaft IN is thus eccentricto the worm-wheel 82 and has gudgeons I84 and I85 extending from its ends, the gudgeon I84 being hollow. The gudgeons I84 and I85 are formed eccentric to the shaft I8I. A clamp bolt I85 passes axially through the gudgeon I84 and one end of the shaft IN and is'screw-threaded into -a block I81 disposed in a recess I88 provided in the shaft II". The block I 81 is adapted to lock the shaft' IN to the worm-wheel 82 when the bolt I85 is tightened, by being wedged between an inclined bottom surface I88 of the recess I 88 secured on one end of a short rocker shaft 18 1 periphery of the cam 5|. By means of the link and the surface I I I of the bore in the worm-wheel groove II4 formed on the end of the gudgeonl85.

r The disc II3 has'a hexagon-shaped boss 31) on its outer side and it will be understood that by applying a suitable wrench to the hexagon boss,

the shaft I8I may be rotated when the block I81 is loosened, .to adjust the eccentricity ofthe gudgeons I44 and I85 relatively to the wormwheel 62. A lever II! is pivoted upon each gudgeon I84 and I65 and has one of its ends pivotally connected to one end of a link II6, the other end of which is pivotally connected to the casing 83. The otherend of each lever III is pivotally connected to one end of a link II1, the other end of which is pivotally connected at H111 to a member IIIb secured to the frame member 66. The pivots II1a are in alignment and they are preferably so positioned that their axis intersects the axis of the shaft end 88.

By means of the above-described roller reciprocating mechanism, thereciprocating ink and water rollers are given an axial reciprocating movement whenever they are rotated through the gear 59. This movement is due to the rotation of the gudgeons I84 and I85 about the axis of the worm-wheel 32, whereby the lever II5is rocked upon its pivotal connection with the link I" and slides the casing 89 along the bar 88 and the shaft 66 of the reciprocating ink and water rollers axially in its hearings in the

frame members

66 and 61. By adjusting the eccentricity of the gudgeons I04 and I05 relatively to the. wormwheel 3-2, the length of the stroke of the respective roller may be varied. Due to the novel arrangement of cranks and levers, the pivotal connection at which the thrust of the lever H5 is applied to the link II1, moves in an elliptical path and the force is exerted with much less side pressure than is present where a simple crank action is used. Hence, there is practically no ing I46 formed in a frame I44. The rod I44 passes lengthwise through and is secured to the frame I46 by nuts I41 and I46. The sleeve I is disposed between collars I48 and III which normally abut against shoulders I62 and Ill respectively provided on the frame I45 and which extend inwardly from the sidesof the opening I46. Springs I54 and I56 coiled about the rod I44 reactvbetween the collars I46 and Ill and the respectively adjacent ends of the opening I46.

Movement of the rod I44 to the left-willswing the lever I34 and relieve the pressure of the spring I38 against the lug of the arm I33. The arm III will then be swung downward by r vity and the catch shoulder I24 will engage the pin I26 and trip the cylinders "oil impression" as hereinafter described.

As shown in Figure 1, the rod I44. extends along the side of all of the units 2|. On one of the units the rod I44 passes through a guide I44a and collars M41) and I44c are secured to the rod on either side of the guide. A spring M411 is placed upon the rod I44 between the guide 'I-44a and. the collar I440 and acts to forcethe rod I44 to the right as shown in the drawings, to the extent permitted by the "collar I44b.

A switch I56 and conductors I51 provide means to energize a solenoid I58 or like device, to actuate a'bell crank I59 and thereby move the rod I44 towards the left as shown in the drawings,

and simultaneously rock the shafts I3I of allof tendency to bend or bind the shaft 60 in its the units 2I in the proper direction to trip the bearings.

As shown in Figures 1 and 2, the improved mechanism for tripping the

form inking rollers

49 and 50, the form moistening rollers 56, the

cylinders and form rollers off impression. If, however, any of the levers I39 are locked in either the impression on or impression of!" position, they obviously will not be affected by the

moveform cylinders

25 and 26 and the upper blanket 4o t of the rod 4 by t s i cylinder 23 includes a crank arm II8, one end of which is pivotally mounted on a crank pin II9 extending from and eccentric to a shaft end I2I of the lower printing or blanket cylinder 24. The other end I22 of the arm H8 is provided with catch shoulders I23 and I24, one on each side edge thereof. The catch shoulders I23 and I24 are adapted to engage pins I25 and I26 respectively between which the arm II8 can be swung. The pins I25 and I26 extend between spaced apart bars I21 and I28, the bar I21 having a squared end I29 adapted to receive a wrench, and the bar I28 being secured on the end of a shaft I3I which extends between and is journaled in the

frame members

66 and 61. Engagement of the catch shoulder I23 on the reciprocating arm II8, with the pin I25 will rock the shaft I3I in one direction, and engagement of the catch shoulder I24 with the pin I26 will rock the shaft I3I in the other direction.

Means whereby the engagement of the pins I25 and I26 by the catch shoulders I23 and I24 is controlled includes links I32 connected to the end I22 of the arm I I8 and to the free end of an arm I33 pivotally supported on the frame member 66. The arm I33 is connected to a lever I34 by The means whereby the various rollers and cylinders are simultaneously tripped in the directions indicated by the arrows I66 in Figure 1, when the shaft I3I is rocked in a counter-clockwise direction includes arms I6I, (Figure 1) se- I66 are arranged eccentric to the bearings I61 so a rod I35 which is pivotally connected to a short arm I36 of the lever I34 and extendsto and through a lug I31 on the arm I33. A spring I38 is coiled about the rod I35 and reacts between it and the lug I31 to constantly urge the arm I33 in a direction to maintain the arm H6 in position for the shoulder I23 to engage the pin I25. The long arm I38 of the lever I 34 has a sleeve in (best shown in Figures 12 and 14) secured 1' me that rotation of the bushings I 66 will raise the axis of the cylinder 23 and separate its peripheral surface from the cooperating peripheral surface of the lower blanket cylinder 24. The form and operation of the rings I64 and the eccentric bearing supporting bushings I66 shown in operative position in respect to the cylinder 23, is similar to that of rings I68 (see Figure 7), which are secured to the hubs I69 of eccentric bearing supporting bushings HI and support the bearings I13 of the form or

plate cylinders

25 and 26. The rings I68 are connected by horizontal links I14 (see Figures 2 and 7), to vertical-links I15 at a point I16 spaced from the upper end of the links The lower ends of the links I 15 are connected by bars I11 to arms I18 secured on a shaft I19" which extends between and is journaledin the

frame members

66 and 61. The shaft I19 has a hand 6e/ t8I secured thereto adjacent the frame er 66 by which it may be manually rocked.

shaft I84 by screws I85.

The upper ends of the links I are connected to arms' I82 and I83 (see Figures 2, 15 and 16), which are secured one on each end of a tubular The tubular shaft I84 is rotatably mounted on and supported by a shaft I86 extending between and journaled in the

frame member

66 and 61. A coiled spring I81 is provided to react between the arm I82 and a stationary stud I88 extending from the frame member 66 to resist the'rotation of the tubular shaft I84 to rock the bushings I'll, and to separate the 'form cylinders and 26 from the

blanket cylinders

23 and 24 respectively. The spring. I81 also similarly acts to resist rotation of the tubular shaft in the opposite direction after it has been moved to trip the cylinders as described. The arm I83 has an extension I89 which is provided with a tool receiving socket I9I by which it, and through the hollow shaft I84, the arm I82 may be rotated to turn both bushings I1I simultaneously. A spring and ball locked pin I92 is provided in the extension I89 and arranged to be inserted in an opening I93 provided in an arm I94 to lock the arm I83 and the arm I94 together.

The arm I94 is rotatably mounted on the end of the hollow shaft I84 adjacent to the arm I83 and has an extension I95 to which links I96 are pivotally secured. The links I96 extend from the extension I95 to an arm I91 secured on the shaft I3I adjacent the frame member 61. Rocking movement of the common rock shaft I3I will,

284 maybe rocked to simultaneously rock the sleeves 28I A spring and ball locked pin 289 is provided in the arm I94 and is arranged to be inserted in an opening 2 provided in the extension 281 to lock the arms 285 and I94 together whereby the sleeves 28Iwill be rocked whenever the shaft I3I isrocked.

The sleeves 28I are each provided with 9. cylindrical surface 2I2 (shown in Figures '1 to 9) eccentric to its axis and to the hub I69. A ring 2 I3 is rotatably mounted upon each eccentric 2I2 and is retained against rotation by links 2I4 piv- Y otally connected at one end to the adjacent frame through the links. I96 and arm I94 (when the pin I92 is in position to lockthe arms I83 and I94 together), rock the hollow shaft I84 to cause the cylinder 25.to be separated from the cylinder 23. This rocking movement of the shaft I3I will also cause the cylinder 23 to be separated from the cylinder 24 by turning the bushings I66 through the arms I6 I, the links I62, and the rings I64 in a similar manner. When the pin I92 is withdrawn from the arm I94, only the form cylinder 25 will be moved to separate it from the blanket cylinder 23, when the arm I63 is turned by a tool inserted in the socket I9I.

The handle I8I is used to adjust the impression pressure, or the degree of'engagement of the form on the cylinder 25 with the blanket on the cylinder 23, and a scale I98 and ahandle locking means I99, (shown in Figure 2), is provided to indicate such adjustment and to lock the handle I8I in its adjusted position. When the handle I8I is locked in position, the shaft I19 is held stationary and the arms I18 through the links I11 hold the lower ends of the links I15 to insure movement of the bushings I1I as above described by rocking movement of the hollow shaft I84.

The means whereby the

form inking rollers

49 and 58 are tripped or separated from the

form cylinders

25 and 26 respectively, includes sleeves 28I (see Figures 7 to 9), rotatably mounted upon the hubs I69 of the bearing supporting bushings HI, and which are connected by links 282, each secured at one of their ends to lugs 283 provided on the sleeves 28I, and at their other ends to arms 284 and 285 (shown also in Figure 2) which are secured one at each end of the shaft I86 adjacent the

frame members

66 and 61 respectively. A coiled spring 286 is provided and arranged to react between the arm 284 and the stationary 'stud I88 to resist rotation of the shaft I86 to rock the bushings I1I. The arm 285 has an extension 281 (best' shown in Figures 2 and 15), provided with a tool receiving socket 288 'by which it, and through the shaft I86, the

arm member

66 and 61 respectively, and at their other ends to a lug 2I5 provided on the respective ring 2I3. The rings -2I3 are held against the side frames by screws 2I6, screw-threaded into the adjacent frame member 56 or 61, elongated openings 2I1 being provided in the rings 2I3 to permit their movement in the general direction of the arrow I68, when the sleeve 28I is turned.

Arms 2I8 and 2I9 (see Figures 8 and 9), are pivoted at their adjacent ends to the rings 2I3 (intermediatethe ends of the form inking rollers 49 and 58) by pivot screws 228 and extend away from each other over and along the ring 2I3. The remote end 22I of each of the arms 2I8- and 2 I 9 has a pm 222 pivotally journaled therein into which an adjusting screw 223 is screw-threaded. The screws 223 are rotatably mounted in lugs 224 (see Figure 10), which are pivotally mounted in the ring 2I3. The screw heads 225 are under constant urge away from the lugs 224 by coiled springs 226 arranged to react between one side of the lugs 224 and the respective screw heads 225. A stop nut 221 screw-threadedon each of the screws 223 is pinned thereto and engages the other side of the lug 224. The springs 226 resiliently maintain the remote ends 22! of the arms 2I8 and 2I9 in their adjusted position.

The arms 2I9 and 2I8 are connected by links 228 to split ink roller sockets 229 and 23I respectively, and these sockets 229 and 23I are carried on arms 229a and 23Ia respectively, each of these arms bein rotatably mounted upon the inner end of a supporting sleeve 238 disposed one at each end of the roller 48 and which also act to secure the roller bearing 99 in position. The

links 228 are pivotally connected to the arms 2 I8 and 2 I 9 intermediate their pivotal connection with the ring 2 I3 and the pin 222. The arrangement is such that when the ring 2I3 is moved toward the

rollers

49 and 58 by the rotation of the eccentric 2I2, the ink roller sockets 229 and 23I will be swung about the axis of the ink roller 48 and be separated from the form" cylinder.

The

rollers

49 and 58 are each journaled in sleeves 232 which are eccentric to the axis of the rollers 49-and 58 and have a central portion reduced in diameter so as to form what may be termed a dumb-bell shaped bearing. The sleeves 232 are clamped in the respective bracket 229 and 23I by a clamp screw 233 which acts on a swingable cap 234 in the usual manner. A roller bearing 235 (see Figure 7), is disposed in each of the

ends

236 and 231 of the sleeves 232. Rotation of the sleeves 232 will adjust the

respective roller

49 or 58 in respect to the reciprocating roller 48 and the amount of this adjustment is indicated by comparison of a dial. and pointer 248.

A vertically extending rod 238 (see Figures 1 and 2), is connected at its lower end to the extension 281 of the arm 285 (see also Figure 16), and at its upper end to one arm 239 of a bell crank 24! pivotally secured to the frame'member 61 by a screw 242. The other arm '243 of the .bell crank 2 is connected by a horiv zontal rod 244 to the catch member 88. The rod 244 passesthrough a lug 245 provided on the catch member 88.

Springs

248 and 241, one

' on each side or the lug 245, react between this the lip 81 by the catch member 86 acts to pre-'- vent the ductor roller 42 from contacting with the fountain roller 4| when the form rollers are tripped ofi or disengaged from the form.

The mechanism employed to trip the printing. 4

cylinders and inking rollers, and the ductor roller operating mechanism of the upper portion of each of the printing units 2| are shown in Figure 2. Although not shown in the drawings, it will be understood that tripping mechanism similar to that shown in Figure 2, is employed for moving the form cylinders 26 away from their cooperating blanket cylinders 24, and for tripping the form rollers away from the form'cylinders 28; also that additional mechanism similar .to that depicted in Figure 2, is provided for operating-the ductor rollers and other members that are duplicated in the lower portion of the printing units. The mechanism for tripping the cylinders and rollers in the lower portion of each unit is operated by a second arm I91 not shown, but also secured on the shaft I3I, and connected to the tripping mechanism in substantially the same manner as that shown for the upper portion of the'unit. I

- During the time that the press is being made ready for a run, and especially when several men are each working on difierent units of the press, it is desirable that mechanism be provided whereby the operator of any unit can so set the tripping mechanism that'the'unit will be tripped on impression and be locked there so the impression cannot be tripped ofi" by an operator on any of the other units, and also, it is desirable that mechanism be provided whereby the operator can set the tripping mechanism of the unit on which he is working, to trip the impression ofi and it will be locked there and the unit will be held ofi" impression until it is unlocked. Manually operated means is provided to separately lockeach of'the levers I34 (see Figures 2, 12 and 13) in a position to trip the cylinders and rollers of any unit 2| on impression, and to lock them in such tripped position,

and these means also provide for tripping on impression, the cylinders and rollers of any unit and locking themin such tripped position.

These means include a spring pressed pin 252- (Figure 13) which is slidably mounted in the end of the arm I39 and secured in the handle I43. Two spaced apart holes 253 and 254 are provided in the frame member 68 and adapted to receive the pin 252 and lock the lever I34 in the above-mentioned positions respectively. In Figures 2, 12 and 13, the lever I34 is shown locked in the impression on position, with the pin 252 clockwise in Figures 1 and 2. I v .movement of the shaft I3I will simultaneously rock the eccentric bushings I66 to trip'all or the alignment with a pin 258 secured in the arm I39 and protruding therefrom. hold the pin 252 In inoperative position and the lever I34 will be free and can be swung by the the pin 252 will then be projected'into the hole 253 and lock the tripping mechanism in the impression on position. When a lever I39 is thus locked in either the impression on" or impression off positions, if the solenoid I58 is energized, it will have no eflect on it or on any lever I39 that is in .a locked position, as the springs interposed between each lever and the rod, permit motion of one. without moving the other.

Assuming that the printing machine is in operation and for some reason it is desired to trip or separate the movable blanket cylinder 23 .from the other blanket cylinder 24, the

form cylinders

25 and 28 from their cooperating blanket cylinders, and the inking rollers from their respective form cylinders onall of the units 2| simultaneously, an operator closes the switch I56 to energize the solenoid I58. I of the solenoid. I58 will, through the bell crank I59, push the rod I44 to the left in.Figur'e 1 to compress the springs I55, whereupon pressure will be exerted to tum-the lever I34 from its normal neutral position to swing the reciprocating arm II 8 of each unit 2| in the proper direction to cause the catch shoulder I24 to engage the pin I26 and rock the shaft I3I counter- This rocking blanket cylinders 23, and through the link I96 rockv the arm I94. As the pins I92- and 209 are both inserted in their respective openings I93 and 2| I in the arm extensions I and 201 respectively when the machine is in operation, rocking movement of the arm I94 will simultaneously rock the eccentric bushings III and the sleeves 20I, tripping-all of the

form cylinders

25 and 28 to separate them from the

respective blanket cylinders

23 and 24 and all of the ink form rollers toseparate them from the

form cylinders

25 and 28. At the same time that the above. cylinders and roller tripping actuation takes place, the swinging movement of all of the ductor rollers'42 is stopped due to the engagement of the catch member 88 with the lip 81.

Should it be desired to trip only the blanket cylinder 23 of one of the units 2|, the pins'i92- plished by inserting a toolin the 'socket l9! and' rocking the hollow shaft I84 thereby. Likewise. it may be desired to trip only the ink form rollers to separate them from the form cylinder 25, and

this is accomplished by withdrawing the pin 209 and rocking the shaft I86 by a tool inserted in the socket 208.

' From the foregoing, it will be understood that the printing impression may be manually tripped by moving the-blanket cylinder 23 out of printing This operation will Energization may be separated from the form by withdrawing the pin 209 from its locked position and rotatin the shaft I" by a tool inserted in the socket 208.

In machines of this kind as heretofore constructed, the inking rollers have been carried on vertically movable plates or light frame members, by means of which they are lifted from the form, usually by cam mechanism, and when the rollers are lowered into engagement with the form they are held in contact with it by gravity, thus allowing the rollers a certain amount of freedom which permits them to bounce as they are engaged and disengaged from the plate or form as it passes under them. With the eccentrically controlled roller operating mechanism as herein disclosed. the rollers are positively held in both the non-engaging and in the engaging positions and a much smoother and positive action results.

Form inking rollers used in machines of this kind have heretofore been rotatably supported in roller sockets secured to the frame members. and

while screw adjusting means for positioning these sockets to give the desired contact pressure of the rollers were provided, adjusting one of these so'ckei's, required first the loosening of one or more bolts which secured the socket to-the frame, then adjusting one or more adjusting screws to re late the pressure and finally tightening the bolts. It will be seen that with the arrangement herein disclosed, the adjustment of any form roller socket with relation to the form cylinder is effected by turning but one screw which is automatically locked in position.

In order to provide for variation in the diameter of the ductor roller, the mechanism for supporting and swinging the ductor rollers provides means for adjustin the axial distance of the ductor roller from the fountain roller by rotation of the eccentric bushings in which the bearings are carried. The pressure of the ductor roller against the ink roller toward which it is swun by the rotation of the cam 6| is separately adjusted by properly positioning the screw 18 in the slot 11. Those versed in the art will appreciate that this is a simpler form of adjustment than those heretofore known. Furthermore, with a variable stroke adjustment thus provided, the cam roller 82 is always in engagement with the cam ti and the start and finish of each swinging movement is gradual and smooth, which contrasts with the abrupt starting and finishing swinging movement obtained by the ductor roller swinging mechanisms usually employed in which the cam roller leaves the cam while the ductor roller is in contact with one of the other of the rollers between which it swings.

Where reference is hereinafter made to mechof, and it is therefore desired that the present embodiments be considered in all respects as illustrative and not restrictive, and it will be further understood that each and every novel feature and combination present in or possessed by the mechanism, herein shown and disclosed, forms a part of the invention included in this applicaworm gear, and a member connected to one of the frame members and to the gear casing and rocked by the crank pin to axially reciprocate the roller when the roller is rotated.

2. In a printing machine, a mechanism for applying a liquid to a form on a form cylinder including a roller mounted for rotatable and axial movement between spaced apart machine frame members, means to rotate the roller, a shaft end on the roller extending beyond one'of the frame members, a casing carried by the shaft end, a revolving crank pin on a rotatable member journale'd in the casing, means carried by the shaft end to rotate the'rotatable member when the roller is rotated, means adjustable to vary the throw of the crank pin, a lever adapted to be rocked by the crank pin when it is revolved. and links connecting the lever to a frame member and to the casing, to axially reciprocate the roller when it is rotated.

3. In a printing machine, a mechanism for applying a liquid to a form on a form cylinder, including a roller mounted for rotatable and axial movement between spaced apart machine frame members, means to rotate the roller, a shaft end on the roller extending beyond one of the frame members, a casing carried by the shaft end, a worm on the shaft end in the casing, a worm gear in the casing to be driven by the worm, a crank pin driven by the worm gear, a lever pivoted on the crank pin, a link between one 'of the frame members and one end of the lever, and a link between the other end of the lever and the casing.

4. In a printing machine, a mechanism for applying a liquid to a form on a form cylinder, including a roller mounted for rotatable and axial movement between spaced apart machine frame members, means to rotate the roller, a worm rotated by the rotating roller, a worm gear driven by the worm, a crank pin extending through the worm gear eccentric to its axis, means to lock the pin to the worm gear, a portion of the crank pin extending beyond a side of the worm gear, the extending portion being eccentric to the axis of the pin, a lever pivotally mounted on the extending portion, a link connecting one end of the lever to one of the frame members, and means connecting the other end of the lever to the roller. I

5. In a printing machine, an inking roller having a shaft rotatable therewith, and means for reciprocating the roller including a speed reducing gear supported in a housing and operable by rotation of the 'shaft, the shaft being rotatable with respect to the housing although axial motion of the shaft with respect to the housing is prevented, a crank connected to said speed the housing, whereby rotating the shaft will.

revolve the crank and effect axial reciprocation of the roller.

6. In a printing machine, ing a shaft rotatable therewith, and means for reciprocating said roller including a speed reducing gear supported in a housing and operable by rotation of the shaft, the shaft being rotatable with respect to the housing although axial motion of the shaft with respect to the housing is prevented, a crank connected to said speed reducing gear and revolved thereby, means for adjusting the throw of the crank, a lever having an intermediate point connected to the crank and having one end connected to a fixed point on the machine and the opposite end connected to the housing, whereby rotating the shaft will revolve the crank and efiect axial reciprocation of the roller.

'7. In a printing machine, an inking roller having a shaft rotatable therewith, and means for reciprocating said roller including a speed re- 'ducing gear arranged within a housing supported by the shaft and secured thereto to reciprocate with the shaft, bearings between the shaft and the housing permitting rotation of the shaft with respect to the housing, a pair of crank pins connected to the speed reducing gear and revolved thereby, levers oscillated by'the crank pins, and connections between the levers and fixed points on the machine; said fixed points being in a plane passing substantially through the axis of the shaft whereby when the shaft is rotated and tion of the shaft with respect to the housing is prevented, an adjustable throw crank mechanism connected to the speed reducing gear having a crank revolved thereby, connections between the crank and a fixed point on the machine,

an inking roller hav- 10. In a printing machine, a roller mounted for rotatable and reciprocable axial movement between spaced apart stationary frame members, means to rotate the roller, a shaft end on the roller journaled in and extending beyond one of the frame members, a worm on the shaft end, a worm gear mounted to be driven by the worm, a shaft eccentrically mounted in the worm gear,

a gudgeon on an end of the shaft in the worm gear and being eccentric thereto, a lever pivoted on the gudgeon, a link connecting one end of. the lever to one of the frame members, and means including a link connecting the other end of the lever to the roller whereby the roller will be reciprocated when the worm gear is rotated.

11. In a printing machine,.a roller mounted for rotatable and reciprocable axial movement between spaced apart stationary frame members,

worm gear mounted to be driven by the worm, a

whereby rotation of the roller effects a reciprocating action of the housing and the roller, said adjustable crank mechanism including a shaft eccentric to a rotating element of the reducing gear, the said shaft having an eccentrically positioned crank, means to rotate the shaft with respect to the rotating element to vary the throw of the crank, and means to secure the shaft to the rotating element.

9. In a printing machine, a roller mounted for rotatable and reciprocable axial movement between spaced apart stationary frame members, means to rotate the roller, a shaft end on the roller journaled in and extending beyond one of the frame members, a worm on the shaft end, a worm gear mounted to be driven by the worm, a shaft eccentrically mounted in the worm gear, a gudgeon on an end of the shaft in the worm gear and being eccentric thereto, a lever pivoted on the gudgeon, a connection between one end of the lever and one ofthe frame members, and a connection between the other end of the lever and the roller, whereby the roller will be reciprocated when the worm gear is rotated.

shaft eccentrically mounted in the worm gear, a gudgeon on an end of the shaft in the worm gear and being eccentric thereto, a lever pivoted on the gudgeon, a connection between one end of the lever and one of the frame members, and a connection between the other end of the lever and the roller, whereby the roller will be reciprocated when the worm gear is rotated, means to rotatably adjust the shaft in the worm gear in respect thereto, and means to lock the shaft to the worm gear in any of its adjusted positions.

12. In a roller reciprocating mechanism, means to mount a roller for axial movement, a roller shaft end, and a stationary frame member in which the roller shaft end is rotatably and axially slidable, a rotatable member carried by the shaft end, means to rotate the member, a shaft extending eccentrically through the rotatable member, a gudgeon on each end of the shaft and eccentric to its axis, means at one end of the shaft to rotate it in respect to the member, means within the member to lock the shaft thereto, means at the other end of the shaft to actuate said locking means, a lever pivoted on each gudgeon, a link connecting a first arm of each lever to the frame member, and means to connect a second arm of each lever to the roller.

13. In a printing machine, a frame, a cylinder running in contact with a roller and reciprocable with respect thereto to effect liquid distribution, an extended shaft for the cylinder, and a selfcontained reciprocating mechanism including a worm driven by rotation of the shaft, a wormwheel, crank and lever connections, and a link on each side of the shaft having'pivotal connections to the frame, the last named connections being on opposite sides of the axis'of the shaft, whereby the axial thrust imposed by the reciprocating mechanism is balanced, and bending pressure on the shaft is avoided.

14. In a printing machine, a frame, a cylinder running in contact with a' roller and reciprocable with respect thereto to effect liquid distribution, an extended shaft for the cylinder, and a reciprocating mechanism including a worm secured to the shaft, a gear support rotatable with respect gudg'eon and oscillated thereby, and amember connecting each lever pivotaily to the frame, the axes of the pivotal connecting points of the said roller having a first gear thereon, a gear support on the shaft and held against axial motion with respect thereto, a second gear rotatable with respect to the support and in mesh with the first gear, an eccentric driving connection on the second gear, and connections from the driving connection tothe support and to the frame, the connections to the frame being on opposite sides of the shaft, whereby rotation of the roller creates a force acting to reciprocate the' roller without tending to bend the shaft.

16; In a printing machine having a frame, it roller rotatably supported by the frame in bearings permitting its reciprocation, a shaft on the roller having a first gear thereon, a gear support on the shaft and held against axial motion with respect thereto, a second gear rotatable with respect to the support and in mesh with the first gear, a lever arranged for swinging movement with respect to the gear support and connected to the second gear to be swung when it is rotated, and connections from the lever to the gear support and from the lever to the frame, the connections to the frame being on opposite sides of the shaft, whereby rotation of the roller creates a force actingv to reciprocate the roller without tending to bend the shaft.

WILLIAM F. HUCK,