US1541890A

US1541890A - Printing-press-tripping mechanism

Info

Publication number: US1541890A
Application number: US662043A
Authority: US
Inventors: William H Banzett
Original assignee: AMERICAN LITHOGRAPHIC CO
Current assignee: AMERICAN LITHOGRAPHIC CO
Priority date: 1923-09-11
Filing date: 1923-09-11
Publication date: 1925-06-16
Anticipated expiration: 1942-06-16

Description

June 16, 1925. 1,541,890

' w. H. BANZETT PRINTING PRESS TRIPPING- MECHANISM Filed Sept. 11, 1923 3 Sheets-Sheet 1 liar/anion WiZZiampHBanzett;

his Attorng.

June; 16, 1925.

1,541,890 w. H. BANZETT PRINTING PRESS TRIPPING MECHANISM Filed Sept. 11, 1923 3 Sheets-Sheet 2 W'zZZiamHBanzett;

iiis litorney;

June 16, 1925.-

W. H. BANZETT PRINTING PRESS TRIPPING MECHANISM Filed Sept. 1923 3 Sheets-Sheet 3 v Inventor," l VillimjfBanzett;

J W m h isAttorngy.

Patented June 16, 1.925.

UNITED STATES PATENT oFFi cE.

WILLIAM H. nanznrrr, or isnaennmnnnnnw JERSEY, nssrenoa T amnnrcan mrnoenarnrc coarrnny, or New YonK, n. Y., A coaronnrron or new YonK.

PRINTING-PBESS-TRIPPING MECHANISM.

Application filed. September 11, 1923. Serial No. 662,043.

To all whomz't may concerai Be it known that I, VVILLIAM H. BANZETT, a citizen of the United States, anda resident of Bergenfield, in the county of Bergen and State of New Jersey, have invented certain new and useful Improvements in Printing- Press-Tripping Mechanisms, of which the following is a specification.

This invention relates to printing press tripping mechanisms, and has for its object to provide a mechanism of the class specified having features of control prompt in response and highly dependable in operation. With these objects in view and others which will appear later herein, my improved mechanism comprises features illustrated in their preferred embodiment in the drawings accompanying this specification, wherein Figure 1 is a side elevation ofso much of a printing press as will suffice to show my improvements. Fig. 2is aside elevation of a portion of what is shown in Fig. 1, with the parts in different relative positions to those shown in Fig.1 Fig. 2 is a side elevation of other features shown in Fig. 1, the relative positions of the, parts corresponding with the showing of Fig. 2. Fig. 3 is a fragmentary side elevation correspond: ing with a portion ofFig. 1 but showing the parts in different relative positions. The scale of Figs. 1 and 3 is the same and the scale of Figs. 2 and 2 is the same but larger than that of Figs l and 3. Thedrawings aremore or less diagrammatic, all framing of the machine being omitted.

The type of press to whih I have chosen to apply my. improvements is the welhknown two-color direct rotary press, wherein-

form cylinders

2 and 3 may be planographic. These cylinders are inked and dampened by known means, and print against sheets fed onto impression cylinder 4 against said inked cylinders. Cylinder 5 is provided for receiving the sheets in succession after they have been printed upon by

cylinders

2, 3. Preferably all four cylinders are the same size. i

Devices for throwing design cylinders on and off pressure in sequence have long been known in the art, but the present improvements are particularly efficient in operation and adaptability to the various requirements of such mechanism.

Cylinders 4 and 5 are carried byshafts 6 and 7 respectively, having fixed axes.

Form cylinders

2 and 3 are carried by shafts 8 and 9 mounted in eccentrics 10, 11, respectively, whereby said shafts and cylinders may be moved into andout of coacting relation with impression cylinder 4.

Each of

cylinders

2 and 3 is provided with inking and dampening means, for convenience shown only in connection with cylinder 2, the inking mechanism for cylinder 3 being in all respects similar to that shown for cylinder 2. Said inking mechanism for cylinder 2 is shown conventionally as ink rollers 12, 13 above, and water or dampening rolls 14, 15 below, eccentrically mounted for movement into and out of coacting relation with said cylinder. Eccentrics 16, 17 of rolls-12, 13 have their

arms

18, 19, respec tively, connected by link 20, and eccentric 17 isprovided with arm 21 connected by link 22 with means for oscillating said eccentrics in unison. Water rolls 14, 15 have similar eccentrics similarly mounted and are preferably operated by hand lever 23. Form cylinder 3 is similarly equipped with ink and water rolls, omitted in the interest of clarity, the ink rolls of which are similarly operated through link 24. Said

links

22 and 24 are pivotally connectedwith arms 25, 26, respectively, fixed to rock shaft 27, as is also arm 28. Said arm 28 has pin 29 for engagement with means for rocking said arms at predetermined time and which means will be described later herein.

Cam 30, fixed to impression cylinder shaft 6, engages successively, rolls 31, 32 pivotally mounted in the upper en'lds of trip blocks 33, 34, respectively. The upper ends of said blocks are guided and said rolls are constrained to engagement with said cam by levers 35, 36, respectively, oscillatable about fixed axes at 37, 38. The free ends of said levers are pivotally connected with said trip blocks coaxially withsaid rolls, respectively. Roll 32 is urged to engagement with cam 30 by spring 43 on rod 44, said rod being pivoted to car of lever 36. Roll 31 is similarly urged toward said cam byspring 46. The lower ends of trip blocks 33, 34 are provided with feet, as 39, 40, ofblock 34, between which are engaged swivel blocks pivoted on fixed studs 41, '42, respectively. Pivoted on stud 41 is rocking yoke 47, having pivoted at opposite ends thereof, respectively, pawls 48, 49. Said pawls are adapted for engagement, one at a time, with opposite ears 50, 51, respectively, of trip block 33 as that block is reciprocatcd by cam 30. Said pawls carry rolls 52, 53, respectively, for engagement with opposite faces, respectively, of 'cam 54 oscillatably mounted on stud 41, and said rolls are urge-cl to engage said cam by pull spring 55 connecting said pawls. Thus far the described appurtenances of trip block 33 are the same as those for trip block 34, and the foregoing description of one will serve for both.

Cams 54, 56 are connected with opposite arms of rocker 57 by links 58, 59, respectively, so that when said rocker is oscillated in anti-clockwise direction to the position of Fig. 1, said cams will be moved in clockwise direction to engage the rolls of pawls 49, 60 and move those pawls to the right, out of engaging relations with the trip blocks, re spectively. Also this movement of cams 54, 56 permits opposite pawls 48, 61 to be engaged by said trip blocks, as those trip blocks are forced downwardly in succession by cam 30, whereby rocking yokes 47, 62 are swun in anti-clockwise direction and, by their connections with the eccentrics of

cylinders

2, 3, throw those cylinders off pressure, away from impression cylinder 4. see Fig. 1.

On the other hand, if rocker 57 is now os cillated in clockwise direction, cams 54, 56 will be oscillated in anti-clockwise direction, thereby permitting pawls 49, 60 to swing into engaging positions with their respective trip blocks, and forcing pawls 48, 61 to their inoperative positions, Fig. 2; Then, upon the rotation of cam 30, trip blocks 33, 34 will successively engage pawls 48, 61 and, through the described connections, oscillate the eccentrics of

cylinders

2, 3 and throw those cylinders on pressure, against impression cylinder 4. It will be noted that, as shown in Fig. 2, when

cylinders

2, 3 are on pressure, the crank members of yokes 47, 62 and their links 102, 103, respectively, which connect them with the cylinder ec centrics, are in locked toggle relation, the yoke axis and the two pivot connections of the link being in one line. Said cylinder eccentrics are thereby locked and the sev-' eral cylinders maintained in operative relation, against any tendency to displacement.

Also, when said cylinders are off pressure, locking means are provided for maintaining cylinder 2 particularly, in its ofi pressure relation to cylinder 4. This device is as follows; Fixed to yoke 47 is cam 104, best seen in Fig. 2, and the major portion of the operative face of which is concentric with stud 41 on which said yoke swings. The lower portion of said cam has lock notch 105 for the reception of roll 106 mounted in the upper end of lever 10?. Said lever is pivotally mounted on fixed stud 108 and has its lower end connected by link 109 with pin 110 on the downreaching arm of rocker 57. Said link has a loose connection with said pin, which permits roll 106 to be urged into engagement with lock notch 105 of cam 104, under the influence of pull spring 111, when the parts are in the position of Fig. 1, thereby holding cam 104 and yoke 47 against displacement. hen rocker 5'? starts to move in clockwise direction, roll 106 is lifted from locking engagement with the notch in cam 104 and that cam and yoke 47 are free to swing about stud 41. This locking deviceis preferably omitted from yoke 62 as the weight of cylinder 3 is sufficient to hold it in off pressure position.

For actuating rocker 57 in cloclm'ise direction, to throw

cylinders

2, 3 on pressure, the following described mechanism is provided: To some convenient shaft, rotating synchronously with the cylinder shafts, as for instance, shaft 7, is fixed cam 63 in operative contact with roll 64 of hell crank 65 pivoted at 66, said pivot having a fixed axis. One arm of said bell crank has pivotally attached thereto latch 67 having notch 68 thereof adapted for engagement with collar 69 of thrust rod 70. Roll 64 is urged to engage cam 63 by spring 84 about spring rod and which rod is pivotally attached at one end thereof to hell crank 65 and the other end thereof slides in fixed block 86. Said spring 84 abuts between block 86 and collar8. fixed to rod 85. When the press is running idle, latch 07 is swung to the left against roll 71 in the lower end of hand lever 72 and is constantly urged in that direction by spring 7 3 about rod 74, abutting between fixed block 7 5 and block 76 fixed to said rod. Rod 74 is pivoted at its right hand end to rock arm 77 turning on fixed pin 78, and the other end of said rock arm is connected by link 79 with latch 67. Hand lever 72 turns on fixed pivot 80 and is urged toward stop pin 81 by pull spring 82 connecting the upper portion of said lever with fixed pin 83. Latch 6? is then free to move up and down under the influence of cam 63, without engaging collar 69.

'llhrust rod 70, to which said collar is fixed. is guided at its lower end by fixed block 88 and spring 89 abuts between said block and collar 69 for urging said rod upwardly. Upward movement of said rod is adj ustably limited by nut 90, near the lower end thereof, engaging fixed block 88. The upper end of said rod is pivoted to one arm of hell crank 91 turning on fixed pivot The other arm of said bell crank is connected by link 93 with depending arm 94 or rocker 57. Adjacent collar 69 of thrust rod 70 is latch bar 124 pivoted at its lower end on fixed pivot 95. The upper end of said latch bar is urged toward said collar and stop pin 96 by pull spring 97. Said latch bar is in its lower position, Fig. 2 when said collar is depressed by latch 67. For thus setting collar 69 under latch notch 98, hand lever 72 is swung in anti-clockwise direction, whereby its roll 7 1 swings latch 67 tothe right, and as cam 63 swings bell crank 65 in clockwise direction, notch 68 of latch 67 engages collar-.69 and forces it downwardly to engagement with latch notch 98, whereby said collar is locked in its lower position. This forcing of said collar downwardly swings bell crank 91 in anticlockwise direction and through link 93 turns rocker 57 in clockwise direction from the position of Fi 1 to that of Fig. 2, as already described. Said collar 69 is released from latchnotch 98 automatically, for throwing

form cylinders

2,3 off pressure, when no'sheet is'fed from board 99 to the impression cylinder, by .LUOWD means, not shown, but acting upon feeder trip rod 100, to thrust that rod to the right a sufficient distance for causing its collar lOlto en 'a 'e and swin the u )er end of latch bar 12 1 far enough to release collar 69. Thereupon spring 89 forces rod upwardly and, through the described connections, rocker 57 is shifted to swing cam 54, 56 which govern the trip block pawls; Bell crank 91 may also be provided with handle 115 for swinging said crank to throw" cylinders .4, 8 on pressure when desired without regard to timing by cam 63.

Fordactuating arms

25, 26, 28 for lifting the ink rolls away from

cylinders

2 and 3, he following means are provided: Fixed on pivot112 in' the crank member 123 of yoke 41-7 is throwback latch 113,which "is constantly urged to the left by pull spring 1 2, and which may be swung to the right by means of handle 114: also fixed te pivot 112. Then cylinders 2 and'3 are on pres sure and ink rolls, as 12, 18, in contact with cylinder 2, Fig. 2, the right hand end of arm 28 is up and itspin 29 is engaged by hook 116 of latch 113. i For holding said latch to its duty in engagement with pin 29,-fixed cam 117 is provided. The left hand curved face of said cam engages pin 118 of latch 118' and, as Said latch moves clownwardly to the position of Fig. 1, pin 118 follows said cam face, and hook 116 in engagement with pin 29

swings'arms

25, 26, 28 in clockwise direct-ion thereby lifting the ink rolls free of the cylinders simultaneously with the separating of the cylinders. If now it is desired to

inkup cylinders

2, 3 while they are oil pressure, handle 11 1 is swungto the left, Fig. 8, whereby throw-.

back latch 118 is swung to the right, free of pin 29. Cam 117 is provided with pocket 120 at its lower end for the reception of pin 118 oflatch 118 when the latch is thrown to the right as just described. Said pin 29, whichpreferably projects from arm 28 suf fieiently to serve as a handle,is then pushed upwardly thereby rocking arm 28 to bring rolls 12, 13, for instance, into contact with cylinder 2, Fig. 3. Hook 119 at the upper end of latch 113 may serve as a limiting stop for pin handle 29. hen the cylinders aresufiiciently inked handle 29 is pressed down to lift said ink rolls free of the cylinder. After cylinders 2, 8 are thrown on pressure said ink rolls may again be brought 1 into engagement with their respective cylinders; by movinghandle 29 upwardly to theposition-of Fig. 2. l Vhile latch 113 is normally urged to the left by spring 122, to insureftheexit of its pin 118 from pocket 1201 under cam 117, before said latch is moved upwardly with the swing of yoke 17 from the position of Fig. 3 to that of Fig. 2, cam are provided at its left hand portion with horn 121 adapted for engaging said pin118 and pushing itte the left ready to rise along the face of cam 117.

To prevent the operationuof latch 67 in case arm 28 has not'loeen moved to its lower position, shown in dotted lines in Fig. 3, the left hand end of rod 7 1 abuts against throwback latch 113 when that latch is swung to the right, Fig. 3, and the pressure of pin 29 in book 119 of said latch will lock said latch and rod 74: against movement to the left until arm 28 is swung down to move said mounted in opposite ends respectively of" said yoke, a trip block mountedfor-recipro cation between said pawls and having means for engaging said pawls for rocking said yoke, a movable cam in coacting relation with said pawls, said cam being adapted for governing the operative relation of said pawlsand trip block, means for urging said pawls to engagement with said cam and trip block, means for reciprocating said trip block, means operatively connecting said yoke and said eccentric bearings, and means for actuating said cam.

- 2. In tripping mechanism for a printing press in whicha form cylinder is mounted in'eccentric bearings for movement toward and from an impression cylinder, the combination of. a rocking-yoke, pawls pivotally mounted in opposite ends respectively of said yoke, a trip block mounted for reciprocation between said pawls and having means for engaging said pawls for rocking said oke, an oscillatable cam in coac'tin relation 1 lac &

gagement by said trip block, means for urging said pawls to engagement with said cam and trip block, means for reciprocating said trip block, means operatively conneeting said yoke and said eccentric bearings, and means for oscillating said cam.

3. In tripping mechanism for a printing press in which a form cylinder is mounted in eccentric bearings for movementtoward and from an impression cylinder, the combination of a rocking yoke, means -for actuating said yoke including an oscillatable cam, means operatively connecting said yoke and said eccentric bearings, means for oscillating said cam, an ink roll mounted in eccentric bearings for movement toward and from the form cylinder, a throw-back latch pivotally mounted on said rocking yoke, means operatively connecting said ink roll and latch for moving said roll away from said form cylinder, means carried by said oscillatable cam for throwing said latch into operative relation with said ink roll con-- necting means, a. fixed cam for maintaining said latch in operative relation with said ink roll connecting means, and means on said latch for engagement with said fixed cam and with said oscillatable cam.

4. In tripping mechanism for a printing press in which two form cylinders are mounted in eccentric bearings for movement respectively toward and from an impression cylinder, the combination of independent means for actuating the eccentric bearings of each form cylinder, a rocker operatively connected with both of the eccentric bearings actuating means, means including a rocking yoke for locking the eccentric bearings of one of said cylinders for holding said cylinder on pressure, and means actuated by said rocker for releasing said eccentric bearing locking means.

5. In tripping mechanism for a printing press in which two form cylinders are mounted in eccentric bearings for movement respectively toward and from an impression cylinder, the combination of independent means including a rocking yoke for actuating the eccentric bearings of each form cylinder, a rocker operatively connected with both of the eccentric bearing actuating means, automatic means timed with said cylinders for actuating said rocker for throwing said cylinders on pressure, and hand actuated means for operatively connecting said automatic means with said cylinder throwing means.

6. In tripping mechanism for a printing press in which two form cylinders are mounted in eccentric bearings for movement respectively toward and from an impression cylinder, the combination of independent means ior actuating the eccentric bearings of each form cylinder, a rocker operatively connected with both of the eccentric bearing actuating means, automatic means timed with said cylinders for actuating said rocker for throwing said cylinders on pressure, hand actuated means for operatively connecting said automatic means with said cylinder throwing means, and hand means for actuating said rocker, independent of said automatic timed means.

7. In tripping mechanism for a printing press in which two form cylinders are mounted in eccentric bearings for movement respectively toward and from an impression cylinder, means for independently actuating the eccentric bearings of each of said form cylinders including in combination a rocking yoke, pawls pivotally mount ed in opposite ends respectively of said yoke, a trip block mounted for reciprocation between said pawls and having means for engaging said pawls for rocking said yoke, a movable cam in coacting relation with said pawls, said cam being adapted for governing the operative relation of said pawls and trip block, means for urging said pawls to engagement with said cam and trip block, means operatively connecting each of said yokes with each form cylinder eccentric bearings respectively, means for successive ly actuating said trip blocks, a rocker operatively connected with said movable cams, automatic means timed with said cylinders for actuating said rocker for throwing said cylinders on pressure, and hand actuated means for operatively connecting said automatic means with said cylinder throwing means.

8. In tripping mechanism for av printing pressin which a form cylinder is mounted in eccentric bearings for movement toward and from an impression cylinder, the combination of means for actuating the eccentric bearings of said :torm cylinder, a rocker operatively connected with the eccentric bearing actuating means, an oscillatable latch bar, a latch on said latch bar, a thrust rod having means for engagement with said latch bar latch, means operatively connecting said rocker and said thrust rod, and means timed with the form cylinder for causing said thrust rod to engage said latch bar latch.

9. In tripping mechanism for a printing press in which a form cylinder is mounted in eccentric bearings for moven'ient toward and from an impression cylinder, the combination of means for actuating the eccentric bearings of said form cylinder, a rocker operatively connected with the eccentric bearing actuating means, an oscillatable latch bar, a latch on said latch bar, a thrust rod having means for engagement with said latch bar latch, means operatively connecting said rocker and said thrust rod, means timed with the form cylinder for causing said thrust rod to engage said latch bar ing yoke operatively connected with the eccentric bearings actuating means, a throwback latch pivoted to said rocking yoke, an oscillatable latch bar, a latch on said latch bar, a thrust rod having means for engagement with said latch bar latch, a rocker operatively connected with the eccentric bearing actuating means, a hell crank one arm of Which is operatively connected With said rocker and the other arm With said thrust rod, a second bell crank, means timed with the form cylinder for rocking said second bell crank, a latch pivoted to one arm of said second bell crank, said second bell crank latch being adapted for moving said thrust rod into engagement With said latch bar, hand actuated means for swinging said second bell crank latch into engaging relation with said thrust rod, means governed by the presence of the throw-back latch in inoperative position for holding said second bell crank latch out of engaging relation With said thrust rod, and means for releasing said latch bar from engagement With said thrust rod.

In Witness whereof, I hereby aflix my signature this 7th day of September, 1923.

WILLIAM H. BANZETT.