US590617A - Registering and tripping mechanism for printing-presses - Google Patents

Registering and tripping mechanism for printing-presses Download PDF

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US590617A
US590617A US590617DA US590617A US 590617 A US590617 A US 590617A US 590617D A US590617D A US 590617DA US 590617 A US590617 A US 590617A
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impression
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F31/00Inking arrangements or devices
    • B41F31/30Arrangements for tripping, lifting, adjusting, or removing inking rollers; Supports, bearings, or forks therefor
    • B41F31/301Devices for tripping and adjusting form rollers

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  • the aim of this invention is to improve the construction of double-cylinder printingpresses in which two impression-cylinders are used in connection with a reciprocating bed.
  • the objects of my invention are to provide means whereby proper register of the sheet to the forms may be insured at the time of printing, to provide means whereby there will be proper register between the two impression-cylinders at the time the sheet is transferred from one cylinder to the other, and to provide means whereby the impression may be suspended or tripped, as it is tech-V nically called, of either or both impressioncylinders and that Without any risk of derangement or accident to any of the various mechanisms.
  • Figure 1 is a side elevation 'of a double-cylind'er printing-press with my improvements applied thereto.
  • Fig. 2 is a sectional elevation just inside the side frame.
  • Fig. 3 is a plan of part of the connecting and operating mechanism for the impression cylinders.
  • Fig. 4 is a side elevation of a part I term the short connecting-bar.
  • Fig. 5 is a similar view of the part1 term the long connectingbar.
  • Fig. 6 is a plan of the two connectingbars arranged in operative relation.
  • Fig. 7 is a plan of the removable block-011 the short connecting-bar.
  • Fig. 9 is a sectional elevation showing the connectingbars in operation.
  • Fig. 10 is a similar view showing the connecting-bars raised, or the impression tripped, and
  • Fig. 11 illustrates a detail of the gearing hereinafter referred to at length.
  • 1 represents an impression-cylinder provided with any of the usual gripper mechanisms to which the sheet to be printed may be fed from the feed-board O, and this cylinder as arranged presents the sheet so that the same will be printed upon its first side.
  • FIG. 2 represents a second impression-cylinder which is provided with suitable gripping mechanism and which may receive the sheet from the cylinder 1 after it has been printed upon this first side, and its second cylinder is so arranged that the sheet may be presented thereby to beperfected, after which the sheet may be taken from the second impressioncylinder by any convenient delivery mechanism.
  • the reciprocating bed a carries forms 5 and 6, which are arranged to cooperate with the impression-cylinders 1 and 2, respectively.-
  • the bed may be reciprocated by any of the usual mechanisms for that purpose.
  • the two impression-cylinders are geared so as to turn continuouslyin opposite directions. This is effected bymounting upon the cylinder 1 a cylinder-gear 10 and upon cylinder 2 acylinder-gear 11, as indicated in dotted lines in Fig. 2.
  • Meshing with the cylinder-gear 11 is a gear 9, and meshing with the cylinder-gear 10 and gear 9 is a gear 8, which gear 8 may be driven from a power-shaft on which is arranged a pinion '7.
  • a shaft 16 is driven by means of gear 12, pinion 13, intermediate 14, and gear 15 upon said shaft 16, and this gearing is so proportioned and designed that the shaft 16 will turn once for each complete excursion of the bed, or once for each two turns of the impression-cylinders.
  • the cylinders 1 and 2 are journaled in eccentric bushings 17 and 18, in which the cylindershafts are placed eccentrically to the bearing of the bushings in the side frames 3
  • rods 19 and 20 are used to connect the bushings with their respective rock-shaft arms 21 and 22, which are secured to the rock-shafts 23 and 24.
  • Levers 21 and 22 and links 19 and 20 are also arranged on the back ends of the shafts 23 and 24, so that the two bushings 17, carrying the shaftof the cylinder 1, and the two bushings 1S,carrying the shaft of the cylinder 2, will be properly operated.
  • Movement is communicated to the rockshaft 23 of the cylinder 1 by means of the cam 25 upon the shaft 16 and slotted yoke 26, having cam-rollers 27 and 28, which bear on the edge of the cam 25, and this yoke 26 may be supported by link 200, connected to bracket 201, and upon the block 202, mounted on the shaft 10 and fulcrumed or connected to the yoke 26, is the long connecting-bar 29, having at its free end an open mouth or bearing to engage stud 49 upon lever 30, which is loosely mounted or fulcrumed upon a rod 3l,held in the main frame 3, and this lever 30 connects by rod or link 32 to lever 33, fast upon the rock-shaft 23.
  • eccentric bushings 17 will be oscillated and the cylinder 1 will be raised and lowered.
  • the mechanism for operating the bushings 18 of the cylinder 2 is substantially the same as that of cylinder 1, except that the short connecting-bar 34 of this mechanism is fulcrumed to the connecting-bar 29 by stud 35.
  • the connecting-bar 34 has a mouth that normally engages pin 50 on lever 36, and thereby oscillates the same.
  • Lever 36 is connected by rod 38 to lever 37, fast on shaft 24, and hence by means of lever 22 and connections 20, as the levers 36 are vibrated, the eccentric bushings 13 will be oscillated and the cylinder 2 raised and lowered.
  • a tripping mechanism In double-cylinder presses a tripping mechanism must necessarily hold both cylinders in their raised positions, so that the bed may be run forward and backward without the cylinders engaging the same, so that the rollers and forms may be inked up preparatory to printing, or so that in case a sheet is not properly fed the impression will not be made upon the cylinders instead of upon the sheet.
  • 1 provide a tripping mechanism consisting of the twobranched lever 39, fastened upon the shaft 400, journaled in the main frame, and means maybe provided, if desired, to operate the shaft from either side of the press.
  • a roller 40 Upon one branch of the lever 39, under the free ends of the connecting-rods 29 and 34, is arranged a roller 40, and to the other branch is connected a link, as 41, which is also connected with lever 42, secured upon the shaft 43, which is also mounted in the main frame. If desired, this shaft 43 can be used to operate the trippingmechanism from either or both sides of the press.
  • lever 44 On the end of shaft 43, outside the main frame, is secured lever 44, to which is con nected the upright rod 45; having-a spring 46 upon it to keep the same in its raised position, and also mounted on the rod 45 at its free end is a foot-tread 47, which is mounted loosely, so that the same maybe turned under the stop48 in case it is desired to keep the press tripped.
  • thebars 29-and 34 are provided at their free ends with extensions 291 and 341, respectively, which run over the roller 40 and just clear'it when op: erating the cylinders in the usual manneigas in Fig.9.
  • the projection 291 is longer than the throw of the bar 29 andthe underside of the same is cut away on a curve, as at 292-,as shown, and the bar 29 is formed witha notch that has 'a short lip 290 and a long lip 293.
  • the bar 34 has anotch that has long lip340 and a short lip 343, and the under side-of the extension 341 is made straight, as shown, but the end of the same is upwardly inclined to form a cam-surface 342.
  • theshape of the bars is such that they will leave the impression-cylinders in their raised 1 mal operation of the parts, when the bar 29 is lifted, it raises the rod 34, as the rod 34 has as normally operating in Fig. 9.
  • a block 51 which normally extends over the rod 29, as shown in Fig. 3.
  • the block 51 is held to the rod 34 by the screw 510, and the same may be held in its adjusted position over the bar 29 by the spring head or clip 53, which is pushed outward by spring 52.
  • the block 51 also has a pin 511, by which the block can be easily moved from the outside of the press. This operation is indicated in Figs. 9 and 10. In Fig. 9 the bars are shown at their extreme position to the left and cylinder 1 raised and cylinder 2 lowered. The block 51 in the normal operation is moved over so as to embrace both connecting-rods 34 and 29, as indicated in Fig. 3.
  • the tripping mechanism can be applied at any part of the operation of the machine, and if one of the cylinders is-up at the time of tripping it will stay up, as the extensions on either of the bars 29 or 34 will be over the roller 40 when its respective cylinder is up, and the cylinder that is down will be brought up by the long lips of the bars.
  • a shaft 54 is secured to the inside of the main frame 3, and a pair of levers 55 and 56 are loosely fulcrumed on this shaft.
  • the lever 56 connects by chain 58 to rod 34 and the lever 55 connects by chain 57 to rod 29.
  • the ends of the levers bear on a suitable bracket 59, fastened to the side frame, and by means of pins .550 and holes 560 the levers maybe 1 held in any adjusted position, but the levers can never lift the bars so the long lips will be disengaged, but only the short lips.
  • the chains will have a sufficient slack, so that the bars may work to and fro without being caught or jerked up by the chains.
  • cylinder 1 it is desired to use cylinder 1 to print on only one side of the sheets or to make the cylinder 1 ready and to keep cylinder 2 in its raised position and in all other respects themachine operated as usualthat is, sheets fed to cylinder 1 will be printed on cylinder 1, transferred to cylinder 2, and not printed on cylinder 2, andthen carried off by the delivery.
  • the inner end of lever 55 will be lowered so that the bar 29 may work raised and lowered in the usual manner and also that the tripping mechanism may be con-' nected to trip or untrip the action of the cylinder 1, as desired.
  • the connecting-rod 29 will engage the stud 49 at the proper time to properly operate-the impression-cylinder 1; 3.180;) will be-seen that if theblock 51 is turned so as not toconnect the bars the tripping mechanislnwould also trip'the impression-cylinder 2.
  • the printing in this operation would be done byfeedin g a sheet to im pression-cylinder 1, al-
  • cylinder 1 is shown as provided with a short segmentand cylinder 2 with a short segment 61.
  • theraclc 62 On the forward extremity of the bed is placed theraclc 62, adapted to engage with segment 60 on cylinder 1, and on the other extreme of the bed is placed rack 63,adapted to engage with segment 61 on cylinder 2.
  • rack 63 On the forward extremity of the bed is placed theraclc 62, adapted to engage with segment 60 on cylinder 1, and on the other extreme of the bed is placed rack 63,adapted to engage with segment 61 on cylinder 2.
  • These segments 60 and 61 will also mesh witheach other as they pass on the cylinders, and thus the two cylinders will be-kept in register while the sheet is being transferred from cylinder 1 to cylinder 2 after having been printed on one side preparatory to being printed or perfected by form 6 and cylinder 2.
  • Segment 60 and rack 62 act as a starting mechanism to start the bed in proper register with cylinder 1 on its movement to the right
  • segment 61 and rack 63 act as a starting mechanism to start the bed in proper register with cylinder 2 on its movement to the left, thus insuring the register of the bed in both directions.
  • Another feature of my invention is the method of applying the registering segments and racks.
  • Segment 60 is rigidly secured to cylinder 1, and rack 62 is provided with slotted boltholes, so that it may be set to engage with segment 60, and the rack 63 has slotted holes to permit of adjustment to its segment, and the segment 61 is adjustably mounted on the cylinder 2, whereby the proper register be tween the cylinders may be obtained.
  • rack 62 is provided with slotted boltholes, so that it may be set to engage with segment 60
  • rack 63 has slotted holes to permit of adjustment to its segment
  • the segment 61 is adjustably mounted on the cylinder 2, whereby the proper register be tween the cylinders may be obtained.
  • My mechanism is not limited to use with any particular means for raising and lowering the impress'ion-cylinders, and it is conceived that if the rock-shafts 23 and 24 were placed directly under the cylinders and made to operate the side arms carrying the cylinders by eccentric ends or toggles it is evident that the principles of my improvements in the impression mechanism would not be departed from. Therefore I do not limit myself to the exact construction shown, as my improvements are adapted to any general form of machine upon which such mechanisms could be applied.
  • both of said bars whereby bothof "said bars may be disconnected from the means :to raiseand lower the impression-cylinders,substantially as described In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

Description

(No Model.) 5 Sheets-Sheet 1.
.W. S. HUSON. REGISTERING AND TRIPPING MECHANISM FOR PRINTINGPRESSES. No. 590,617. 7 Patented Sept, 28,1897.
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REGISTERING AND TRIPPING MECHANISM FOR PRINTING PRESSES.
No. 590,617. Paige (1 Sept. 28, 1897.
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(No Model.)
W. s. HUSON. REGISTERING AND TRIPPING MECHANISM FOR PRINTING PRESSES.
No. 590,617. Patented Sept. 28, 1897.
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W. S.,HU SON. REGISTERING AND TRIPPING MECHANISM FOR PRINTING .PRBSSES. No. 590,617. Patented Sept. 28, 1897.
NITE Sfrnrns T ATENT nron.
, \VINFlELD S. HUSON, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO THE CAMPBELL PRINTING NEW YORK, N. Y.
rnnss AND MANUFACTURING COMPANY, or-
&
REGISTERING AND TRIPPING MECHANISM FOR PRlNTlNG-PRESSES.
SPECIFICATION forming part of Letters Patent No. 590,617, dated September 28, 1897.
Application filed April 28, 1892. Serial No. 431,024. (No model.)
To aZZ whom it may concern:
Be it known that I, WINFIELD S. HUsoN, a citizen of the United States, residing at Taunton, in the county of Bristol and State of Massachusetts, have invented a new and useful Improvement in Registering and Tripping Mechanism for Printing- Presses, of which the following is a specification.
The aim of this invention is to improve the construction of double-cylinder printingpresses in which two impression-cylinders are used in connection with a reciprocating bed.
The objects of my invention are to provide means whereby proper register of the sheet to the forms may be insured at the time of printing, to provide means whereby there will be proper register between the two impression-cylinders at the time the sheet is transferred from one cylinder to the other, and to provide means whereby the impression may be suspended or tripped, as it is tech-V nically called, of either or both impressioncylinders and that Without any risk of derangement or accident to any of the various mechanisms.
To these ends the invention consists of the combinations described and claimed in this specification and illustrated in the accompanying five sheets of drawings, in which Figure 1 is a side elevation 'of a double-cylind'er printing-press with my improvements applied thereto.
Fig. 2 is a sectional elevation just inside the side frame. Fig. 3 is a plan of part of the connecting and operating mechanism for the impression cylinders. Fig. 4 is a side elevation of a part I term the short connecting-bar. Fig. 5 is a similar view of the part1 term the long connectingbar. Fig. 6 is a plan of the two connectingbars arranged in operative relation. Fig. 7 is a plan of the removable block-011 the short connecting-bar. Fig. Sis an end elevation, partly in section, of the hand-operatingmechanism for the connecting-bars. Fig. 9 is a sectional elevation showing the connectingbars in operation. Fig. 10 is a similar view showing the connecting-bars raised, or the impression tripped, and Fig. 11 illustrates a detail of the gearing hereinafter referred to at length.
p I will further describe my invention as applied to a double-cylinder two-revolution sheet-perfecting press, but with the understanding that the same may be applied and used in any double-cylinder printing-press.
Referring to the drawings and in detail, 1 represents an impression-cylinder provided with any of the usual gripper mechanisms to which the sheet to be printed may be fed from the feed-board O, and this cylinder as arranged presents the sheet so that the same will be printed upon its first side.
2 represents a second impression-cylinder which is provided with suitable gripping mechanism and which may receive the sheet from the cylinder 1 after it has been printed upon this first side, and its second cylinder is so arranged that the sheet may be presented thereby to beperfected, after which the sheet may be taken from the second impressioncylinder by any convenient delivery mechanism.
4: represents the usual reciprocating bed mounted to cooperate with the impressioncylinders 1 and 2. These parts (before decribecl) are all mounted in the usual manner in the side frames 3 3.
The reciprocating bed a carries forms 5 and 6, which are arranged to cooperate with the impression- cylinders 1 and 2, respectively.-
The bed may be reciprocated by any of the usual mechanisms for that purpose.
The two impression-cylinders are geared so as to turn continuouslyin opposite directions. This is effected bymounting upon the cylinder 1 a cylinder-gear 10 and upon cylinder 2 acylinder-gear 11, as indicated in dotted lines in Fig. 2.
Meshing with the cylinder-gear 11 is a gear 9, and meshing with the cylinder-gear 10 and gear 9 is a gear 8, which gear 8 may be driven from a power-shaft on which is arranged a pinion '7. By this means the two impressioncylinders will be driven positively in the proper directions, but their respective cylinder-gears will not intermesh, which is an importantpoint, as hereinafter noted.
From the gear 9 a shaft 16 is driven by means of gear 12, pinion 13, intermediate 14, and gear 15 upon said shaft 16, and this gearing is so proportioned and designed that the shaft 16 will turn once for each complete excursion of the bed, or once for each two turns of the impression-cylinders.
In the type of machine under discussion it is necessary to alternately raise the impression-cylinders after each has made its impression, so as to clear the form on the non-print ing stroke of the bed relatively to that impression-cylinder. To accomplish this, the cylinders 1 and 2 are journaled in eccentric bushings 17 and 18, in which the cylindershafts are placed eccentrically to the bearing of the bushings in the side frames 3 To operate or oscillate these bushings, rods 19 and 20 are used to connect the bushings with their respective rock- shaft arms 21 and 22, which are secured to the rock- shafts 23 and 24. Levers 21 and 22 and links 19 and 20 are also arranged on the back ends of the shafts 23 and 24, so that the two bushings 17, carrying the shaftof the cylinder 1, and the two bushings 1S,carrying the shaft of the cylinder 2, will be properly operated.
Movement is communicated to the rockshaft 23 of the cylinder 1 by means of the cam 25 upon the shaft 16 and slotted yoke 26, having cam-rollers 27 and 28, which bear on the edge of the cam 25, and this yoke 26 may be supported by link 200, connected to bracket 201, and upon the block 202, mounted on the shaft 10 and fulcrumed or connected to the yoke 26, is the long connecting-bar 29, having at its free end an open mouth or bearing to engage stud 49 upon lever 30, which is loosely mounted or fulcrumed upon a rod 3l,held in the main frame 3, and this lever 30 connects by rod or link 32 to lever 33, fast upon the rock-shaft 23. By these connections when the cam 25 operates to move the yoke 26 to and fro therock-shaft 23 will be oscillated,
and also by the means before described the eccentric bushings 17 will be oscillated and the cylinder 1 will be raised and lowered.
The mechanism for operating the bushings 18 of the cylinder 2 is substantially the same as that of cylinder 1, except that the short connecting-bar 34 of this mechanism is fulcrumed to the connecting-bar 29 by stud 35. The connecting-bar 34 has a mouth that normally engages pin 50 on lever 36, and thereby oscillates the same. Lever 36 is connected by rod 38 to lever 37, fast on shaft 24, and hence by means of lever 22 and connections 20, as the levers 36 are vibrated, the eccentric bushings 13 will be oscillated and the cylinder 2 raised and lowered.
The extremes of the throw of the cam 25 areindicated in Figs. 9 and 10. Bythe means described the cylinders 1 and 2 will be alter nately raised and lowered, so that the cylinder2 will be raised to clear form 6 while cylinder 1 is printingfrom form 5 and cylinder= essary to provide a tripping mechanism. In double-cylinder presses a tripping mechanism must necessarily hold both cylinders in their raised positions, so that the bed may be run forward and backward without the cylinders engaging the same, so that the rollers and forms may be inked up preparatory to printing, or so that in case a sheet is not properly fed the impression will not be made upon the cylinders instead of upon the sheet.
To meet the above requirements, 1 provide a tripping mechanism consisting of the twobranched lever 39, fastened upon the shaft 400, journaled in the main frame, and means maybe provided, if desired, to operate the shaft from either side of the press.
Upon one branch of the lever 39, under the free ends of the connecting- rods 29 and 34, is arranged a roller 40, and to the other branch is connected a link, as 41, which is also connected with lever 42, secured upon the shaft 43, which is also mounted in the main frame. If desired, this shaft 43 can be used to operate the trippingmechanism from either or both sides of the press.
On the end of shaft 43, outside the main frame, is secured lever 44, to which is con nected the upright rod 45; having-a spring 46 upon it to keep the same in its raised position, and also mounted on the rod 45 at its free end is a foot-tread 47, which is mounted loosely, so that the same maybe turned under the stop48 in case it is desired to keep the press tripped.
As shown in the drawings, thebars 29-and 34 are provided at their free ends with extensions 291 and 341, respectively, which run over the roller 40 and just clear'it when op: erating the cylinders in the usual manneigas in Fig.9. The projection 291 is longer than the throw of the bar 29 andthe underside of the same is cut away on a curve, as at 292-,as shown, and the bar 29 is formed witha notch that has 'a short lip 290 and a long lip 293. The bar 34 has anotch that has long lip340 and a short lip 343, and the under side-of the extension 341 is made straight, as shown, but the end of the same is upwardly inclined to form a cam-surface 342. It will be seen-that the long and short lipsof the-two bars 29 and If now the'tread 34 are oppositely disposed. 47 is depressed and held, as bystop 48, the roll 40 will be raised, so as to be in the path' of the projections 291 and 341 of the bars, and
theshape of the bars is such that they will leave the impression-cylinders in their raised 1 mal operation of the parts, when the bar 29 is lifted, it raises the rod 34, as the rod 34 has as normally operating in Fig. 9.
a block 51, which normally extends over the rod 29, as shown in Fig. 3. The block 51 is held to the rod 34 by the screw 510, and the same may be held in its adjusted position over the bar 29 by the spring head or clip 53, which is pushed outward by spring 52. The block 51 also has a pin 511, by which the block can be easily moved from the outside of the press. This operation is indicated in Figs. 9 and 10. In Fig. 9 the bars are shown at their extreme position to the left and cylinder 1 raised and cylinder 2 lowered. The block 51 in the normal operation is moved over so as to embrace both connecting- rods 34 and 29, as indicated in Fig. 3. The parts are shown Now if the roller 40 should be raised by the tripping mechanism the connecting-rods will be raised and the short lip 290 of bar 29 will be lifted to clear the stud 40 of the lever 30. This will leave the lever 30 in the position shown in Fig. 9, so that cylinder 1 will remain in its raised position. Now as the connecting-bars reciprocate or move to the right the long lip 340 of the connecting-rod 34, bearing on stud 50, will move lever 36 to the right, as shown in Fig. 10, and as the connecting-bars move forward the lower part of connecting-rod 29 will rest on the stud 49, and thereby both connecting-rods will remain in their raised position. Now when the connecting-bars have moved their entire distance to the right cyl-v inder 2 will be raised, and as the connectingbars now move back to the left the short lip 343 of the bar 34 will clear the stud 50, and thus both cylinders will be left in their raised positions, and as the bars continue to reciprocate back and forth the roll 40 and stud 49 will keep them in their raised positions, so that they will not act to either raise or lower the impression-cylinders. Thus so long as the roller 40 is kept in the position shown in Fig. the mechanism for raising and lowering the cylinders will have no effect on the cylinders.
The tripping mechanism can be applied at any part of the operation of the machine, and if one of the cylinders is-up at the time of tripping it will stay up, as the extensions on either of the bars 29 or 34 will be over the roller 40 when its respective cylinder is up, and the cylinder that is down will be brought up by the long lips of the bars. WVhen it is desired to untrip the impression mechanism, it is also desirable to have the parts so arranged that the cylinder 1 shall be lowered first and then cylinder 2, because if the tripping mechanism is such that it would permit cylinder 2 to be lowered before cylinder 1 then it would either cause an impression to be taken on the surface of the cylinder 2 or else a sheet would have to be run through the machine without receiving an impression on its first side, and great care would have to be taken to untrip the mechanism only when it was right to move the cylinder 1 first. However, the block 51, before referred to, is
for'if the roller 40 is released when the bar 34 could drop into position the bar 29 would still be held up by the stud 49, and thus the bar 34 would not engage stud 50. Thus, for example, in Fig. 10, suppose the r0ller40 were depressed. This would have no efiect on the bars, as the bars would still be held up by stud 49 until bar 29 has been moved to the left, so that the mouth of the same can engage stud 49 and thus move lever to-the right before the mouth of bar 34 can engage the stud 50. No matter in what position of the connecting-bars the roller is depressed the mouth of connecting-bar 29 must first engage stud 49 to operate cylinder 1 before connecting-bar 34 can engage stud 50 to operate cylinder 2. By this mechanism and means for controlling the cylinders great advantage is derived in the operation of the press, as it calls for no attention on the part of the op-' erator as to the time of trippingand untripping.
Sometimes it is desirable to'print'from one cylinder only and to keep the other cylinder in its raised position, and also in the process of making ready the printing-surfaces of the impression-cylinders it is desirable to suspend the raising and lowering of one while the other is being prepared and not to interfere with the impression of the cylinder under preparation. To accomplish this, I ap-, ply an auxiliary device for tripping or raising the bars 29 and 34 individually at will.
Referring to the drawings, it will be seen that a shaft 54 is secured to the inside of the main frame 3, and a pair of levers 55 and 56 are loosely fulcrumed on this shaft. The lever 56 connects by chain 58 to rod 34 and the lever 55 connects by chain 57 to rod 29. The ends of the levers bear on a suitable bracket 59, fastened to the side frame, and by means of pins .550 and holes 560 the levers maybe 1 held in any adjusted position, but the levers can never lift the bars so the long lips will be disengaged, but only the short lips. When the inside ends of the levers are depressed, I
the chains will have a sufficient slack, so that the bars may work to and fro without being caught or jerked up by the chains. Suppose now it is desired to use cylinder 1 to print on only one side of the sheets or to make the cylinder 1 ready and to keep cylinder 2 in its raised position and in all other respects themachine operated as usualthat is, sheets fed to cylinder 1 will be printed on cylinder 1, transferred to cylinder 2, and not printed on cylinder 2, andthen carried off by the delivery. In this case the inner end of lever 55 will be lowered so that the bar 29 may work raised and lowered in the usual manner and also that the tripping mechanism may be con-' nected to trip or untrip the action of the cylinder 1, as desired. Thus if the roller 40 is raised by the tripping mechanism the end of the rod 29 will bear on the roller when the connecting-rods are at their extreme to the left, and thus will leave lever 30 moved to the left or to the position shown in Fig. 10, with 1 If the tripping impression-cylinder 1 raised. mechanism is now actuated to lower roll 40,
the connecting-rod 29 will engage the stud 49 at the proper time to properly operate-the impression-cylinder 1; 3.180;) will be-seen that if theblock 51 is turned so as not toconnect the bars the tripping mechanislnwould also trip'the impression-cylinder 2.
After the cylinder 1 is'ready or'when it is desired touse the press in the usual manner all that is necessary is to depress the inner end of lever 56 and to turn the bloclc5l back, so asto engage both bars, if the same has been previously turnedto disconnect the Again, suppose it is desired to print bars. from cylinder 2 or to make cylinder 2 ready and to keep cylinder 1 in its raised position.
The printing in this operation would be done byfeedin g a sheet to im pression-cylinder 1, al-
lowing thesame toturnaround or to be carried 1 around by the cylinder 1 in its raised position, then transferred to cylinder 2 in the usual manner, and printed on cylinder 2 in the usual manner. For this operation the inner end of lever would be raised to lift connecting-bar29 off the stud 49, and thus to leave the impression-cylinder 1 in its raised position and the block 51 turned to the position shown in Fig. 7, so that the bars-are disconnected. Evidently now, as the bar 34 moves forward and backward in the usual manner, impression-cylinder 2 will beraisedand lowered in the usual manner.
If it should be desired to trip the cylinder 2 when the same-is operating alone, it can be done by the tripping mechanism before described. Thus suppose the-roll 40 should be raised asthe bar 34 moves to the right the portion 342 of the same will run up on the roller and thus will lift the short lip 343 off the stud 50, or, in other words, will leave the not engage the stud 50, as when the bar moves intoposition' to engage the-stud it will be held from such engagement by the roller 40 acting on the cam-surface 342.
WVhen it is desired to untrip the cylinder 2, the roller 40 is lowered, and evidentlythe mouth of the rod 34 will engage the roll 50 at the proper time and thus throw the cylinder 2 into operation.
Even if the operator should not throw the block 51 over onto block 29 and should operate the machine in the usual manner to print a-sheet, the cylinders could be trippedby simply manipulating the trip mechanism, as the cam-surface 342 of the connecting-bar 34 would raise the rod at the proper time, so
that the mouth of bar 34 would clear the stud 50 and the cam 29 would be lifted, as before described; but it is preferred to use the block in the ordinary operation because it lifts bothrods out of engagement by one contact with roller 40 and insures the proper starting before described. Also it will beseen that when the block 51 is turned to connect both bars both cylinders may be tripped by'manipulating lever 55 or that thecylinder 2 can b'e-alone tripped bymanipulating lever 56. Thus if it is desired simplyto have a lever for tripping the cylinders the tripping mech-' anism could be dispensed with and both cylinders controlled from: lever 55, as it -in lifting bar 29 would also lift bar 34 bymeans of block 51. Alsothe handles shown on levers 55 and '56 could be=replaced by foot-treads to beoperated by the foot; but I prefer tosupply the two means'shown for trippingas being the best adapted to meet the conditions under which the machine operates. Thus an extremely efficient trippingmechanism is provided bywhich the cylinders may be controlled individually or together in any desired manner, and a mechanism that-requires no care on the part of theoperator, as -no matter in what part of the operation the cylinders are tripped or untripped they will always start in operation again so that cylinder 1 will work first.
In Figs. 1 and 2the cylinder 1 is shown as provided with a short segmentand cylinder 2 with a short segment 61. On the forward extremity of the bed is placed theraclc 62, adapted to engage with segment 60 on cylinder 1, and on the other extreme of the bed is placed rack 63,adapted to engage with segment 61 on cylinder 2. These segments 60 and 61 will also mesh witheach other as they pass on the cylinders, and thus the two cylinders will be-kept in register while the sheet is being transferred from cylinder 1 to cylinder 2 after having been printed on one side preparatory to being printed or perfected by form 6 and cylinder 2. Segment 60 and rack 62 act as a starting mechanism to start the bed in proper register with cylinder 1 on its movement to the right, and segment 61 and rack 63 act as a starting mechanism to start the bed in proper register with cylinder 2 on its movement to the left, thus insuring the register of the bed in both directions.
In the ordinary operation the two segments 60 and 61 will mesh with each other just as each cylinder is being raised or lowered by the impression mechanism, the cam 25 being properly proportioned to get this effect no matter which cylinder is being raised or lowered.
I When the cylinders are both tripped, the
relation of'one to the other is the same; but
if one cylinder is tripped and the other cylinder is in operation the conditionsare slightly changed, as the segments may not then pass while the cylinders are in exact horizontal line; but I have found by use and experiment that by easing the first meeting'spaces and teeth, but still leaving the middle teeth of proper dimension, the backlash inherent to the raising of the cylinders from their operating-gears will allow sufficient variation, so that with the segments arranged as before described the cylinders can be brought into register withoutjar or shock, and, further, as the cylinders are not geared to each other the smooth action of one cylinder will not be affected by the movement of the other. I am thus enabled to operate the raising and low ering, the tripping, and the registering mechanisms of the cylinders in any desired position without any risk of injury to the parts. The peculiar arrangement of the segments isshown in Fig. 11, and, as shown, the segment of cylinder 1 has seven teeth and the segment 61 of cylinder 2 seven spaces.
In the order in which they engage I make the first tooth comparatively narrow and the first space comparatively wide, the next space wider than normal, and the next tooth narrower than normal, but the middle teeth I make of normal shape. This easing off is especially shown in the figure before referred to. It may be also desirable sometimes to slightly ease the'last teeth that engage in the segments.
Another feature of my invention is the method of applying the registering segments and racks.
Segment 60 is rigidly secured to cylinder 1, and rack 62 is provided with slotted boltholes, so that it may be set to engage with segment 60, and the rack 63 has slotted holes to permit of adjustment to its segment, and the segment 61 is adjustably mounted on the cylinder 2, whereby the proper register be tween the cylinders may be obtained. Thus by having one segment fixed. there is less opportunity for the disarrangement of the segments and racks than if all were adjustable.
Furthermore,.it will be noticed that I employ separate racks for each segment, thereby avoiding any alteration in the meeting of one if the other is moved, which would be the case if the machine were arranged with the seg' ments meshing with each other and only one rack on the bed.
My mechanism is not limited to use with any particular means for raising and lowering the impress'ion-cylinders, and it is conceived that if the rock- shafts 23 and 24 were placed directly under the cylinders and made to operate the side arms carrying the cylinders by eccentric ends or toggles it is evident that the principles of my improvements in the impression mechanism would not be departed from. Therefore I do not limit myself to the exact construction shown, as my improvements are adapted to any general form of machine upon which such mechanisms could be applied.
The details and arrangements of parts herein shown anddescribed may be greatly varied by a' skilled mechanic Without departing from the scope of my invention as expressed in the claims.
Having thus fully described myinvention, what I claim, and desire to secure by Letters Patent, is
1. In a cylinder printing-press, the combination of the two independently-driven coacting impression cylinders, the gears of which do notmesh, each cylinder having a segment, which segments are adapted to mesh with each other, the meeting teeth of the segments being eased off, as described, the reciprocating form bed carrying racks adapted to coact with the segments of the cylinders to form starting mechanisms, and means for suspending the vertical movement of either or both of the cylinders without alfecting the mesh of the segments, substantially as described.
2. In a cylinder printing press, the combination of two coacting impression-cylinders having intermeshing registering segments thereon, means for raising and lowering the impression-cylinders, means whereby one cylinder may be suspended from printing or tripped, and held in this position, and means for tripping or untripping the vertical operation of the other cylinder, the segments being eased ofi, as described, whereby the segments may properly mesh in the various positions of the cylinders, substantially as described.
3. In a cylinder printing-press, the combination of two impression-cylinders, mechanism for raising and lowering said impressioncylinders, means for suspending or tripping the action of the raising and lowering mechanism, and means whereby when the raising and lowering mechanism is again set into operation, the same cylinder will always act first no matter at what period of operation the raising and lowering mechanism is thrown into operation, substantially as described.
4. In a cylinder printing-press, the combination of the first and the second impressioncylinders, means for alternately raising and lowering said cylinders, means for suspending or tripping the action of the raising and lowering mechanism of both cylinders, and means whereby when the raising and lowering mechanism is again thrown into operation, the same cylinder will always act first, substantially as described.
5. In a cylinder printing-press, the combination of the two coacting impression-cylinders, means for raising and lowering the same,
cylinders, means for suspending the verticalmovement of one cylinder without affecting the action of the other, and means whereby the same cylinder will always act first when both cylinders are again brought into operation, substantially as described.
7. In aperfectin g double-cylinder prin tin gpress, the combination of the two impression-- cylinders 1 and2, means for raising and lowering-said impression-cylinders to give the impressions, a tripping mechanism adapted to suspend the action of either or both of said 1mpression-cylinders, and connectionswhereby when the machine is started again in its operation, the first impression-cylinder to' which sheets are fed will be first started in operation before the second impression-cylinder, substantially as described.
8. Ina double-cylinder printing-machine, the combination of the two coacting impression- cylinders 1 and 2, means for raising-and lowering the same, theconnecting-bar 29, means for reciprocating the same, the corn necting-bar 34 pivoted to the bar 29, connections fromthese bars to raise and lower the impression cylinders, means for throwing either of the connecting- bars 29 or 3% out of operation, and a member as 40 arranged so that the same can be thrown into the path of the connecting-bars, so that the same will disconnect either or both bars, as theyhappen to be in operation, substantially as described.
9. In a double-cylinder printing-machine, the combination of the two coacting impression- cylinders 1 and 2, means for raising and lowering the same, the connecting- bars 29 and 34, means for reciprocating said bars, connections from said bars to the means for raising and lowering the impression-cylinders, and means, as block 51, for connecting and disconnecting said connecting-rods, so that they may act together or independently, substantially as described.
10. In a double-cylinder printing-machine, the combination of the two coacting impression-cylinders, means for raising and lowering the same, the two reciprocating connecting-bars, detachable connections between said bars;and the means for raising and lowering:
the impression-cylinders, and a member as 40 adapted to be interposed inthe path of said bars to detach the same, said bars' having a connection as block 51 arranged be= tween the same, substantially as described.
11. In a double-cylinder printing-machine, the combination of the two coacting im'pressi'on-cylinders, means for raising and-lowering the same, the two connecting- bars 29 and 34, and detachable connections from the same to the means for raisingiand loweringthe impression-cylinders, a block as 51 forconnectin g said connecting-bars, and a lever for raisingone of said bars, and through'the block:
51 both of said bars, whereby bothof "said bars may be disconnected from the means :to raiseand lower the impression-cylinders,substantially as described In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.
WINFIELD: S." HUSON';
lVitnesses:
LoUIs W. SoUTHeATE,
II. A. Wise-W001).
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