US1339316A - elaine - Google Patents

Description

I.' R. BLAINE. PRINTING PRESS TRIPPING MECHANISM.

` Patented May 4,1920,

6 SHEETS-SHEET I.

APPLICATION FILED APR. 22, 1916.

' @5665.' Inv/@MZWI www J, R.VBLAINE. Pmmme PRESS TmPPlNG MEcHAmsM.

APPLICATIDN FILED APR-22,1916.

Patented May 4, 1920.

6 SHEETS-SHEET 2.

J. R. BLAINE.

PRINTING PRESS THIPPING MECHANISM. APPLICATloN man APR.22,1916.

1,339,31 6 Patented May 4, 1920.

6 SHEETS-SHEET 3.

J. R. BLAINE.

PRINTING PRESS TRIPPING MEJHANlSM.

APPLxcATloN rufo APR.22,1916.

Patented May 4, 1920.

6 SHEETS-SHEET 4.

J. R. BLAINE.

PRINTING PRESS TRIPPING MECHANISM.

APPLICATION FlLED APR.22.19|6.

1,839,316. Patented May 4, 1920.

, s SHEETS-SHEET 5.

I. R. BLAlNE.

PRINTING PRESS TRIPPING MECHANISM.

6 SHEETSMSHEET 6.

APPLICATlON FILED APR. 22, 1916. 1,339,3v l 6. Patented May 4, 192.

UNITED sTATEs PATENT oEEroE.

JOSEPH R. BLAINE, OF OAK PARK, ILLINOIS,IASSIGNOR TO MIEHLE PRINTING PRESS 4 & MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLI- N OIS.

PRINTING-PRESS TRIPPING MECHANISM.

Patented May 4, 1920.

Application mea April 22, 191s. serial No. 92,819.

To all who/1L 4it may concern-f y Be it known that I, JOSEPH R. BLAINE, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and use-. ful Improvements in Printing-Press Trip` ping Mechanism, of which the following is a specification.

The object of the invention is the provision of compact, simple and efficient tripping mechanism for an offset press, adapted to the operation of the same alternatively as a single or double revolution press, including mechanism for moving the blanket cylinder out of operative contact with both the form and impression cylinders, also for moving the impression cylinder out of contact with the blanket cylinder and also for moving the form `rollers away from the plate or form cylinder.

ln order that the invention may be read# ily understood a preferred embodiment of the same in one form or convertible single and double revolution offset press is s et Jr'orth in the accompanying drawingsand in the following detailed description based thereon.

constructional forms to adapt the same to the circumstances of use, wherefore it will be understood that the description and drawings are to be taken -in anillustrative rather than in an unnecessarily .limiting Sense.

Fig. 6 is a diagrammatic view showingparticularly the tripping mechanism for the form rollers; and

Fig. 7 is a detail plan View of certain of the elements shown in Fig. 6.

In the drawings is shown a press equipped with the tripping mechanism forming the Obviously `the invention is susceptible of embodiment .in other and varied.l

` subject matter of this application, the press The driving mechanism and other details of construction having nothing to do with the present inventlon are not herein shown.

Blanket cylinder trip, single revolution.

For the purpose of tripping the blanket cylinder out of operative contact with both the form cylinder and the impression cylinder, the blanket cylinder has its bearings in bearing blocks eccentrically mounted. This eccentric bearing is indicated at 16 (Figs. 1 and 4) 'and is connected by means of the rod 17 with an arm 18 fixed upon the shaft 19. The shaft 19 also has fastened thereon an arm 20 with a latch plate 21. An arm 22 is loosely pivoted upon the shaft 19 and in turn has pivoted thereto at 23 a latch 24, the purpose of which will be shortly described. The cam groove 25 is formed on the end of the blanket cylinder 12 for traverse by a rollerv26 carried by onev arm 27 of an angle lever fulcrumed at 28 and hav- `ing another arm 29 pivoted at 30 to a link 31 connected to the arm 22, which is loose onthe shaft 19.

The latch 24 is pivoted at 23 to the arm 22 and overlies the latch plate 21 projecting from the fast arm 20 but is held out of engagement therewith normally by means of a Cam faced arm 32 pivoted at 33 and hav-v ing an arm 34 extending at an angle and pivoted at 35 to one member of the toggle lever 36, 37.V The member 37 of the toggle is mounted on the rock shaft 38 from which an arm39 angularl'y extends provided' with a lug 40.

The toggle 36, '37 is straightened or broken in either direction by means of a.

link 41 connected at 42 to thev toggle joint and at'43 to a treadle 44 fulcrumed at 45.`

For convenience of access a duplicate treadle 44n is provided at the opposite side ofthe press and is operatively connected with the treadle 44 by means of the link 46. The two treadles 44 and 4 4a are normally held yieldingly in their elevated position by means of` the rod 47 guided in the bracket 48 and under the control of the spring 49.

It is well understood that in mechanism of this character it is essential that the tripping of the cylinders shall take place only at certain stages of the passage of a sheet through the press, and in order to insure this the impresson cylinder 13 is provided with a cam groove 5() traversed by a cam roller 51 carried by one arm 52 of a bell crank lever fulcrumed at 53, the other arm 54 of which is connected by means of a link with an arm 56 pivoted at 57, which arm 56 is provided with a. stop 58. The stop 58 during the dwell of the cam is in the path of the lug 40 carried by the arm 39 and is only removed therefrom when the roller 51 reaches the high point of the cam as indicated in Fig. 4, at which time it is permissible to trip the blanket cylinder. It will be observed that upon the point 57 is also pivoted another arm 59 bearing a stop 60 which is normally interposed in the path of the lug 40 carried by the arm 39 and consequently serves to limit the rearward movement of the arm 39 and lug 40 to a point just clear of the stop 58.' This arm 59 is connected .by means of a link 61 with a lever 62, fulcrumed at 63 and carrying a cam roll 64 which travels in the cam groove 50.

Let us assume that, operating as a single revolution offset press, it becomes necessary to trip the blanket cylinder 12 by reason of a mis-fed sheet or other temporary contingency. The operator steps upon the treadle 44 or 44a which brings the lug 4() against the stop 58. As soon as the cam roll 51 reaches the position indicated in Fig. 4 the stop 58 will be withdrawn out of the path of the lug 40 and the arm 39 can move to a position with its lug 40 in contact with the stop 6() and behind the stop 58. Concurrently therewith the toggle 36, 37 is straightened and the arm 32 is lowered to permit the latch 24 to engage with the latch plate 21 of the arm 20 which is fast on the shaft 19, thus coupling the arm 22 which reciprocates with the link 31 at every revolution of the press, to the arm 20 fast on the shaft 19. Thereafter the shaft 19 partakes of the motion of the arm 22 imparted by means of the cam roller 26 traversing the groove 25. the shaft 19 is angularly shifted and. acting through the arm 18 and the rod 17 upon the eccentric 16, trips the blanket cylinder 12 out of contact with the plate cylinder 11 and the impression cvlinder 13. This tripped relation of the blanket cylinder may be maintained throughout successive revolutions of the press cylinders if the operator keeps his foot'upon the treadle 44. Tn circumstances such as those assumed. however. the operator will immediately remove his foot from the treadle 44 and the arm 39 will he held in tripped position by means of the stop 58 which will have dropped in front of the lug 40. When the impression cylinder 13 shall have made one revolution, and the cam roller 51 has `reached again the position shown in Fig.

4, the stop 58 will be removed out of the path of the lug 40 permitting the spring 49 to raise the treadle and restore the parts of the mechanism to the position shown in said ligure, whereupon the latch 24 will have disengaged from the latch plate 21 and the cylinder 12 will be returned to its printing relation with the other cylinders.

Occasions arise when it is desirable to maintain the blanket cylinder out of contact relation with the other cylinders throughout successive revolutions as for instance, when prcliminarily inking the form or plate cylinder 11, making it advantageous to disconnect the tripping mechanism at the parts 21, 24 so that the blanket cylinder 12 will remain tripped instead of successively tripping at each revolution of the cylinder as would be the case if the treadle 44 were held down in the position previously indicated.

This is accomplished in the manner following: Having depressed the lever 44 and straightened the toggle 36, 37 in the manner previously indicated, bringing the lug 4() against the stop 60, the operator continues his pressure upon the treadle 44 until the ram roll 64 reaches the high point of the cam groove 5() corresponding to that occupied in Fig. `4 by the cani roller 51. At this time the stop 6() is lifted out of the path of V.the lug 40 and the arm 39 can move still farther to the left to a position with the lug 40 beyond the stop 60, again breaking the toggle 36, 37 but in the opposite. direction, releasing the connection between the latch 24 and the latch plate 21 while the cylinder 12 is in tripped position. The latch 65 may then be brought into place to hold the treadle in this extreme positionso that the arm 39 cannot again swing to the right upon the removal of the stops 60 and 58 at each revolution of the cylinder. Under these conditions. the blanket cylinder 12 will remain out of contact with the cylinder 11 and 13 until the latch 65 is released and the arm 39 allowed to move to the position shown in Fig. 4 through suc.- cessive stages by the withdrawal of` the stops 60 and 58.

Blanket (2y/Under fri/. (Zou/ble revolution.

lVhen operating as a double revolution press. it will be understood that the time of tripping must accord with the double revolution. instead of the single revolution as under the conditions previously described. All the parts of the mechanism previously referred to by reference numerals are employed when running as a double revolution press which are included between numerals 16 and 58 inclusive with the exception of the arm 34, cam arm 32 and the pivot 35. Wheii changing to a double revolutionv press the arm 36 of the toggle lever is disconnected from the arm 34 at the pivotal point 35 and is instead connected at 35a (Fig. 5) to an arm 66 lof an angle lever fulcrumed at 67, the other arm 68 of said lever being provided with a projecting nose 69. Operating as a double revolution press, the arm 34 is substituted by the arm 34a to the upper end of which at 70 is pivoted the arm 71 carrying a cam roll 72 which bears upon the cam 73, the latter being driven so as to make one revolution to each two revolutions of the respective cylinders 11, l2 and 13. Having fixed relation to the arm 71 is an arm 74, having at its lower end a hooked projection 75. p y

Running normally, the two- armed lever 71, 74 is essentially integral with arm 34a since the projection 69 of arm 68 holds arm 74Vthrough itsv projection 75 at the point of oscillation. This allows cam arm 32El with its arm 34, through arms 71, 74 to raise and lower latch 24 successively for printing and tripped revolutions under the influence of cam 73 against which the roll72 is held by spring 76. The printing revolution obtains when latch 24. is disconnected and cam roller 72 is on the high part of cam 73, while the tripped revolution obtains when cam roller 72 is on low part of cam 73. To trip for a mis-fed sheet, the latch 24 must remain in the connected position during the printing revolution which under normal conditions obtains with cam roller 72 on high part of cam 73. In other words the cam roller 72must not act to raise latch 24 during the printing revolution. This condition is brought about y by the projecting nose 69 on arm 68 moving down out of the path of projection 75 on le ver 71. 74, allowing the latter 71, 74, to oscillate freely about its center 7 0 on arm 34a.

Suppose it is desired to trip the blanket cylinder, the operator steps upon the treadle 44 straightening the toggle 36, 37 to a certain extent whereby the projecting nose 69 of the arm'68 is lowered out of the path ofv the hooked projection 75 of the arm 74 thus effecting an uncoupling of the lever 71, 74 with the arm 34i and allowing the cam arm 32a to remain in thelower position .so as to permit the latch 24 to stay in engagement with the plate 21 and utilize the reciprocatory motion of the link 31 to trip the cylinder 12 in the manner previously described. This can only be done, as in the previous case, when the stop 58 is lifted out of the path of the lug 40 by the cam roll 51 having reached its proper position, the stop 58 then dropping in front l'of the lug 40 to hold it in tripped position until the next revolution of the cylinder 13, at which time the lug 58 will be lifted, the arm 39 allowed to move to the right, and the members 68, 74 coupled so as to disconnect the latch 24 from theplate 21 i at the proper time for the printing revolution to begin and allowing the cylinder 12 to remain in operating contact with the cylinders 11-and 13.

Impression cylinder trip.

In order to permit the impression cylinder 13 to be tripped from contact with the blanket cylinder 12 while the latter is in contact with plate cylinder 11 as for instance when inking up the blanket, the bearing blocks of cylinder 13 are 'arranged to move laterally under the iniuence of an eccentric 77 controlled by an arm 78 connected by a link 79 with a lever 80 fulcrumed at 81. By grasping the handle of the lever 8() the operator is able to shift the eccentric arm 78 and thereby move the impressioncylinder 13 bodily away from the blanket cylinder 12.

I nie roller trip.

- are mounted in slotted bearings-on `a rigid frame so as to be susceptible of movement relative to said 'frame in 'a direction tangent to the innermost rider rolls 84, 85. The shafts 89, 89EL carry arms 90, 91, gearedvby means of teeth to the trip bars 92, 93 and opposite the said toothed gearing isv a similar gearing connecting the arm 94, 95, of bell crank levers fulcrumed at 96, 97 and having arms 98, 99 arranged to act upon the under beveled surface of ,the frames 86, 88 pivoted at 87, 87a and bearing at their free ends upon the spindles of the form rolls 82,83 next adjacent each other, whereby these two rolls may be moved as previously-described. The remaining golls 82, 83 are moved with frames 86, 88 away from the cylinder in substan tially radial directions.

lBy reason of the `fact that the angular area of the plate or form cylinder contacting at any one time with the form rollers 82, 83

. is only slightly less than the gap in said cylinder indicated at 104, it is necessary that these two sets of inkziollers be tripped in succession rather than simultaneously. It is also necessary, in order to effect a tripping of these rolls when and only when the gap is beneath the same, that the tripping impulse-be stored up and utilized inits action upon the ink vrolls at the proper moment.

To effect this result the following mechanism is employed: Upon the shaft 19 is fixed an additional arm 105 pivoted at 106 to a link 107 connected at 108 to the arm 109 of a bell crank lever fulcrumed at 110, the other arm 111 of which is pivoted at 112 to a block 113 mounted upon a storage bar 114 which has secured thereto at 115 the lower end of the rod 92. vThe block 113 is slidable upon the rod .114 and has interposed between it and lock nuts 116 on said rod a compression spring 117. y Upon the other side of the block 113 is arranged a compression spring 118 which bears `with its opposite end upon a nut 119. Upon the rod 114 is likewise mounted at one side thereof a block 120 slidable upon a second bar 121 and bearing at one side upon a compression spring 122 which abuts against the lock nut 123 and at the other side upon a compression spring 124, which abuts against a lock nut 125, the opposite end of the bar 121 being connected at 126 to the trip bar 93.

At the end of the plate or form cylinder 11 is arranged a cam groove 127 traversed by two cam rollers 128, and 129, the former carried by the arm 130 of a bell crank lever fulcrumed at 131 and carrying by its other arm 132 a roller 133, while the other cam roll 129 is carried by the arm 134 of a bell crank lever fulcrumed at 135 and carrying by its other arm 136 a roller 137. The trip bar 92 has upon its outer edge a recess 138 adapted to receive the roller 133 while the bar 93 has upon its inner face a similar recess 139 for the reception of the roller 137. These two trip bars 92, 93 are provided respectively with lugs 140, 141 arranged to coact with lugs 142, 143 upon the frame.

Upon the tripping of the blanket cylinder in the manner previously described, whether acting as a single or double revolution press, the angular shifting of the shaft 19 to shift the blanket cylinder will at the same time by means of the arm 105 lower the link 107 and thereby tend to move the bar 114 to the left. The movement of the bar is resisted by the roller 33 bearing against the lower end of the bar 92 and consequently the spring 117 is compressed. At a time corresponding to the passage of the gap 104 beneath the form rollers 82 the cam roller 128 will have reached the high point of the cam 127 and the roller 133 will be lifted to a position in line with the recess 138, whereupon the lower end of the bar 92 will move to the left relieving the pressure on the spring 117 and permitting the same to again expand. The entering of the cam roller 128 onto the low part of the cam 127 will pull down the bar 92 and, connected by the gearing at its upper end, will swing the form roller frames upwardly upon their hinge 87, thus tripping the set of form rolls 82.

At the moment the roller 133 is in line of bar 93 tends to move to the left also but this movement is resisted by roller 137 on lever 136 bearing on edge of bar 93. Consequently the movement of bar 114 to the left compresses spring 122, which is much lighter than spring 117, and not until roll 129 reaches the high part of cam 127 will the roller 137 on arm 136 come in line with recess 139 and allow the spring 122 to force bar 93 to the left. The entering of cam roller 129 onto the low part of cam 127 will pull down bar 93 thus tripping the set of form rolls 83.

When, upon the next revolution of th cylinders, the tripping mechanism is released at 40, 58, as previously described, the link 107 will be moved upwardl and its force stored reversely within the springs 118 and slightly later in 124. By virtue of the fact that the movement of bars 92, 93 is resisted by lugs 140, 141 being in contact with rigid stops 142, 143 and not until roller 133 raises bar 92 to its highest position will the spring 118 be free to move bar 114 to the right disconnecting bar 92 from operating cam 127. The movement of bar 114 to the right compresses spring 124 (which is much lighter than spring 118) since the lug 141 on bar 93 is in contact with rigid stop 143. Then as roller 137 moves bar 93 up to its highest position lug 141 moves out of the path of stop 143 and spring 124 is free to move bar 93 to the right thereby disconnectlng form roll set 83 and mechanism will be in position shown in Fig. 6.

Provision is made for the manual llfting of all of the form rolls by the hand lever 145 loosely pivoted on the cross shaft 89a and connected by a link 146 with an arm 147 vof the cam 148 and by a link 149 with an arm 150 of a cam 151, said cams operatlng to raise roller frames 86, 88 and by a link 152 with an arm 153 on a cross shaft 154 connecting to similar arms and links on opposite side of press whereby the form roller frames are lifted bodily and in unison independently of the automatic means previously described.

When starting up a press of this type it is necessary to ink up the plate while the blanket cylinder 12 is out of contact with it, 11e. when the blanket cylinder is in the tripped position. Normally the tripped position of the blanket cylinder automatically trips the form rolls as previously described and in order to ink up the plate it is necessary-to neutralize the automatic roll trip mechanism. This is done in the following manner: Hand lever 155 is fastened to a shaft 156 about whose center it pivots. Lever 157 also fastened to shaft 156 has a stud 158 extending laterally and in the path of a slot 159 in bar 114. lVith the blanket cylinder in the tripped position bar 114 automatically moves tothe left connecting up mechanism previously described to raise the form rvolls. Byl throwing lever 155 upward to the right approximately 90o stud 158 moves about pivot 156 and contacts with the right inner edge of slot 159 acting as a stop to prevent bar 114 from moving to the left. This causes the movement of bell crank arm 111 to compress spring 117 but effecting no movement of bars 92, 93 by cam rolls 127 and 128. Thus the form -rolls are not raised from contact with the plate surface.

Aumz'lvarg/ delivery control.

I over the stud 161 and lock the lever arm 29 and the link bar 163 together. The opposite end of the link bar 163 is pivoted at 166 to an arm 167 connected to the eccentric shaft 168 which acts upon the bearings of the auxiliary cylinder 15 to move the same bodily toward and from the impression cylinder 13. An arm 169 extending beyond the eccentric 168 has a lateral cam face adapted to bear against the stud pin 170 and project the same into the path of the grippers 171 carried by the impression cylinder.

- .A leverv 172 fastened to eccentric shaft 168 has a slide link 173 pivotedat 174and sliding in 175. Link 176 is connected at l 177 to 173 at one end and to 178 on cam 179 at the other end, which ,cam is in the path of the gripper operatingf lever 180.-

The operation is as follows: If the press man desires to inspect7V a sheet upon the table 160 he pulls the hand lever 181 and thereby drops the latch 165 into engagement i with the stud 161 causing the link bar 163 to partake of the motion of the lever arm 29 shifting the eccentric shaft 168 to bring the auxiliary cylinder 15 into operative engagement with the impression cylinder 13 andpermit the grippers 182 to take the sheet therefrom, the stud pin/*170 having 1. The combination with the plate, blan-I ket and impression cylinders of a printing press, of means for tripping the blanket cylinder, an oscillatory member driven in unison with the blanket cylinder and controlling the tripped position in one direction and the printing position in the opposite direction, a releasable connection between the oscillatory member and the tripping means, manually operable means to engage and disengage the said connection, andmeans under the control of the impression cylinder to determine the time at which the engaging and disengagingmay be effected in either the tripped 0r printing position .of the blanket cylinder. 2. The combination with the plate, blanket and impression cylinders of a printing press, of means for tripping the blanket cylinder comprising an eccentric bearing therefor, an oscillatory me ber driven in unison with the blanket cyli der, a releasable connection between the oscillatory member and the eccentric bearing, means manually operable in one direction to'engage and in the opposite direction to disengage the said connection, andi means under the control of the impression cylinder to determine the time at which the engaging and disengaging may be effected in either the tripped or the printing position of the blanket cylinder.

3. The combination with the plate, blanket and impression cylinders of a printing press, of means for tripping the blanket cylinder comprising an eccentric bearing for said cylinder, a rock shaft, a rod eccentrically connecting the bearing and shaft, an arm loose on the shaft, a cam actuated in unison with the blanket cylinder, a driving connection between the cam and loose larm whereby to oscillate the latter,a latch for optionally coupling the arm and shaft, a cam actuated in unison with the impression cylinder, manually operable means to actuate the latch to couple and uncouple the arm and shaft, and means actuated by the vimpression cylinder cam to control the time at which the'manually operable means mayl eHect the coupling by means of the latch.

4. The combination with the plate, blanket and impression cylinders of a printing press, ofmeansfor trippingthe blanket cylinder comprising an eccentric bearing for said cylinder, a rock 'shaft having an arm fixed thereon, a rod connecting the bearing and fixed-arm, an arm loose on the shaft, a cam actuated in unison With the blanket cylinder, a driving connection between the cam and the loose arm whereby to oscillate the latter, a latch for optionally coupling the loose and fast arm, a cam actuated in unison with the impression cylinder, manually operable means to engage and disengage the latch to couple and uncouple the arms, and means actuated by the impression cylinder cam to control the time at which the manually operable means may effect the coupling of the arm by means of the latch.

5. The combination with the plate, blanket and impression cylinders of a printing press, of means for tripping the blanket cylinder comprising an eccentric bearing for said cylinder, a rock shaft, a rod eccentricall)7 connecting the bearing and shaft, an arm loose on the shaft, a cam actuated by the blanket cylinder, a driving connection between the cam and loose arm whereby to oscillate the latter, a latch for optionally coupling the loose arm and shaft, a detent arranged to normally hold the latch disengaged with the arm and shaft in uncoupled position, a toggle connected to the detent, manually ope able means to straighten and break the toggle, an arm moving with the toggle, a cam actuated by the impression cylinder, a stop moved by said cam into and out of the path of the toggle arm to control the time at which the manually operable means may eii'ect a straightening of the toggle to withdraw the detent, said stop moving behind the armto maintain the detent in withdrawn condition during a single revolution of the impression cylinder, and a. manually controlled catch to maintain the toggle. with the latch in disengaged position independent of the impression cylinder' cam.

6. The combination with the plate,blanket and impression cylinders of a printing press, of means for tripping the blanket cylinder comprising an eccentric bearing for said cylinder, a rock shaft having an arm fixed thereon, a rod connecting the bearing and arm, an arm loose on the shaft, a cam actuated by the blanket cylinder, a driving connection between the cam and loose arm whereby to oscillate the latter, a latch for optionally coupling the loose and fast arms, a detent arranged to normally hold the latch disengaged with the loose and fast arms in uncoupled position, a toggle connected to the detent, manually operable means to straighten and break the toggle in both directions, an arm moving with the toggle, al

cam actuated by the impression cylin( er, a stop moved by said cam into and out of the path of the toggle arm to control the time at which the manually operable means may' eHect a straightening of the toggle to withdraw the detent, said stop moving to a position behind the arm to maintain the detent in withdrawn condition during a single revolution of the impression cylinder, a second stop also moved by said impression cylinder cam to limit the straightening movement, of the toggle in one position of the cam and in another position thereof to permit the breaking of the toggle in the opposite direction and to engage behind the arm whereby to disengage the latch in the tripped position of the blanket cylinder and to maintain the same in disengaged position during a single revolution of said cylinder, and a manually controlled catch to maintain the toggle with the latch in disengaged position independent of the impression cylinder cam.

T. The combination withl the plate, blanket and impression cylinders of a printing press, of blanket cylinder tripping mechanism, operating mechanism moving in timed relation to the blanket cylinder, coupling mechanism comprising normally disconnected parts, one of said parts constantly moving in each alternate revolution of the impression cylinder, manually operated means for connecting the parts of the coupling mechanism whereby to render said coupling mechanism effective to disengage and reengage the operating and tripping mechanism, and means actuated in timed relation to the cylinders to control the time at which the manually operable means may connect the elements of the coupling mechanism.

S. The combination with the plate, blanket and impression cylinders of a printing press, of means for tripping the blanket cylinder comprising an eccentric bearing for said cylinder, a rock shaft having an arm fixed thereon` a rod connecting the bearing and arm. an arm loose on the shaft, a cam actuated by the blanket cylinder. a driving connection between the cam and loose arm whereby to operate the latter, a hitch for optionally coupling the loose and fast arms, a cam member making one revolution to each two revolutions of the blanket cylii'ider, a latch coupling mechanism comprising a detent arranged to normally hold the hitch in uncoupled position, a cam actuated lever having one arm bearing on the last mentioned cam member and the other arm releasably connected to the detent whereby at every second revolution of the press to permit the engagement and disengagement of the latch, and means to connect the. detent and cam actuated lever, a toggle operatively connected to the coupling mechanism to connect the detent and cam actuated lever, manually operable means to straighten and break the toggle, an arm vmoving with the toggle, a cam actuated by the impression cylinder, a stop movable by said cam into and out of the path of the toggle arm to control the time at which the Ymanually operable means may effect a sets being removed from and resored intov contact with the form in the same order.

10. The combination with the plate cylinder of a printing press and the blanket cylinder, of tripping mechanism for the blanketcylinder operable in timed relation to the rotation of the said cylinder, of form inking rollers arranged in a plurality of sets, and means for successively tripping the sets of form inking rollers in isochronism with the tripping of the blanket cylinder at a predetermined interval of time thereafter.

11. The combination with the blanketand plate cylinders of a printing press, frames mounted for movement toward and away from the plate cylinder, a set of form inking rollers mounted in the frame, a trip bar connected to each frame and having a recess therein, a cam moving in unisonwith the cylinder, levers corresponding in number to vthe trip bars, one arm of eachlever traversing the cam, a projection carried by the other arm of each lever adjacent a recess in a trip bar, primary and auxiliary impulse- `storage bars fast to the lower ends of the trip bars, a block slidable on each storage bar, an abutment spring on each side of the block,.the storage bars secured together by means of the block fast to one and slidable on the other, a'irock shaft having an arm thereon, a connection between the rock arm and the sliding block of the primary storage bar, a tripping connection vbetween the rock shaft and the blanket cylinder, and meansv for rocking said shaft to trip the blanket cylinder, whereby as the blanket4 cylinder is tripped the sets of form rollers are automatically tripped in succession.

12. The combination with the blanket and ,plate cylinders of a printing press, frames the trip* bars, one arm of each lever travers- ,ing-the cam, a projection carried bythe other arm of each lever adjacent a recess inI a trip bar, primary `and auxiliary impulsestorage bars fast'lto the lower ends of the trip bars, .a-.block slidable on each stora e bar, an abutment spring oneach side of the block, the storage bars secured together byv means of the block fast to one and slidable on the other, a level' having one arm attaclied to the sliding block of the primary storage. bar, a 'ock shaft having an arm fixed thereon, a link connerting between the rock arm and lever` a tripping connection between the rock shaft and 'the blanket cylinder, and means for rocking said shaft tov trip the blanket cylinder', v'hereby as the blanket cylinder is tripped the sets of form rollers are automatically tripped in succession and at a predetermined interval of time after the tripping of the blanket cylinder.

13. The combination with the blanket and the trip bars, onen arm of each lever travers-A ng the cam, a projection carried by the other arm of each lever adjacent a recess in a trip bar, primary and auxiliary impulsestorage bars fast tothe lower ends of the trip bars, a block slidable on each storage bar, an abutment spring on each side of the block, the storage bars secured together by means of the block fast to-one and slidable inder, whereby as the blanket cylinder is tripped the sets of form rollersare automatically tripped in succession, and means to manually trip the ink rollers independently of the blanket cylinder 'comprising cam members acting on roller frames, a hand lever, and link connections between the cams and hand lever.

14. The combination with the plate cylinder of aY printing press and the blanket cylinder, of tripping mechanism for the blanket cylinder operable in timed relation to the rotation of the said cylinder, of form inking rollers arranged in a plurality of sets, means for successively tripping the sets of form inking rollers in isochronism with the tripping of the blanket cylinder at a predetermined interval of time thereafter, and means to manually trip the ink rollers independently of the blanket cylinder.

15. The combination with the plate cylinder of a printing press and the blanket icylinder, of tripping mechanism for the blanket cylinder operable in timed relation to the rotation of the said cylinder, of form inking rollers arranged in a plurality of sets, means for successively tripping the sets of form inking rollers in isochromsm with the tripping of the blanket cylinder at a predetermined interval of time thereafter, and means to maintain the inking relation of the form rollers to y'the plate cylinder independently of the tripping of the blanket cylinder.

16. r1`he combination with the plate cylinder of a printing press and the blanket cylinder, of tripping mechanism for the blanket cylinder operable in timed relation to the rotation of the said cylinder, of form inking rollers arranged in a plurality of sets. means for successively tripping the sets of form inking rollers in isochronism with the tripping of the blanket cylinder at a` predetermined interv-al of time thereafter, means to manually trip` the ink rollers independently of the blanket cylinder, and means to maintain the inking relation of the form rollers to the plate cylinder independently of thc tripping of the blanket cylinder.

l?. rlhe combination with the blanket and plate cylinders of a printing press, frames mounted for movement toward and away from the plate cylinder, a set of form inking rollers mounted in the frame, a trip bar connected to each frame and having a recess therein. a cam moving in unison with thel cylinder, levers corresponding in number to the trip bars, one arm of each lever traversing the cani, a projection carried by the other arm of each lever adjacent a recess in a trip barr` primary and auxiliary impulsestorage bars fast to the lower ends of the trip bars, a block slidable on each storage bar, an abutment spring on each side of the block, the storage bars secured together by means of the block fast to one and slidable on the other, a rock shaft having an arm thereon, a connection between the rock arm and the sliding block of the primary storage bar, a tripping connection between the rock shaft and the blanket cylimier,v means for rocking said shaft to trip the. blanket cylinder, whereby as the blanket cylinder' is tripped the sets of form rollers are auto-- matically tripped in succession, and means to maintain the lnking relation of the form of the tripping` of the blanket cylinder comprising a manually controlled member to prevent the movement of the primary storage bar under the impulse of the rock shaft.

18. The combination with the blanket and `plate cylinders of a printing press, frames mounted for movement toward and away; from the plate `cylinder, a set of form inking rollers mounted in the frame, a trip bar connected to each frame and having a recess therein, a cam moving in unison with the cylinder, levers corresponding in number to the trip bars, one arm of each lever traversing the cam, a projection carried by the other' arm of each. lever adjacent a recess in a trip bar, primary and auxiliary impulsestorage bars fast to the lower ends of the trip bars, a block slidable on each storage bar, an abutment spring on each side of the block, the storage bars secured together by means of the block fast to one and slidable on the other, a rock shaft having an arm thereon, a connection between the rock arm and the sliding block of the primary storage bar, a tripping connection between the rock shaft and the blanket cylinder, and means for rocking said shaft to trip the blanket cylinder, whereby as the blanket cylinder is tripped the sets of forming' rollers are automatically tripped in succession, means to manually trip the ink rollers independently of the blanket cylinder comprising cam members acting on the roller frame, a hand lever, and link connections between the cams and hand lever, and means to vmaintain the inking relation of the form rollers -to the `plate cylinder independently of the tripping of the blanket cylinder comprising a manually controlled stop member to prevent thev movement of the primary storage bar under the impulse of the rock shaft.

In witness whereof I have hereunto signed my naine in the presence of two subscribing witnesses.

' JOSEPH R. BLAINE. litnesses ARTHUR G. JAoosoN, A. Gr. FISCHER.

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