US1040448A - Printing-press. - Google Patents

Description

W. H. SMITH. PRINTING PRESS.

APPLICATION I'ILED NOV. 26, 1910.

Patented Oct. 8, 1912.

W. H. SMITH.

PRINTING PRESS.

APPLICATION FILED NOV. 20, 1010.

1,040,448. Patented 001;. 8, 1912.

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W. H. SMITH.

PRINTING PRESS.

APPLICATION FILED NOV. 20, 1910.

Patented Oct. 8, 1912.

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ence to the means for driving connected to the press frame.

STATESTATENT OFFICE.

WALTER H. SMITH, OF NILES, OHIO, ASSIGNOB TO THE E.ABBIS AU'IOIA'IIC PRESS COMIIANY, OF NILES, OHIO, A CORPORATION OF OHIO.

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Specification of Letters Patent.

Application filed llnvember 26, [1910. Serial No. 594,300.

To all whom it may concern Be it known that I, WALTER H. SMITH, of Niles, in the county of Trumbull and State of Ohio, have invented certain new and useful Improvements in Printing-Presses; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. I 4

This invention relates to that class of printing presses having stops on one of the rotating cylinders and means for feeding stock up to the stops at a speed greater than the speed of rotation of the cylinder, suchmeans being shown in patent to Charles G. Harris No. 577,299, dated February 16, 1897.

The present invention has s ecial refere feed rolls by which the stock is given the necessary accelerated motion to enable it to be fed up to the stops on the press cylinder; and the primary object is to enable the driving means to be readily adjusted to obtain at any predetermined point in the revolution of the cylinder the variable speed necessary in feeding the stock to register with the I ripheriesfor only about one-half of their stops of the cylinder while in motion.

A further object is'to enable the feed-rolls and their support to be moved bodily away from the press without disturbing the relation of the prime mover to the press, whereby even though there be a change in the positions of the press cylinders while the feedrolls and their support are removed from the press, the operation of the feed rolls will be properly timed when restored to working position relatively to the press cylinders.

The invention will be hereinafter fully set forth and particularly pointed out in the claims. y

In the accompanying drawings, Figure 1 is a view in side elevation of a portion of a printing press equipped with my present improvements. Fi 2 is a plan now thereof, with parts bro en away. Fig. 3 is an enlarged sectional view showing portions of the two feed-roll shafts and the operating means therefor. Fig. 4 is a side elevation of two of the feed-rolls. Fig. 5 is a fragmentary plan view, with parts omitted and others broken away. Fig. 6 is a fragmentary side view showing the feeder frame Fig. 7 shows the pawl. engaging the one tooth ratchet.

- eral reductions is to allow stock to be rea Referring to the drawings, 1 designates the frame of a printing press, a portion only of which is shown; 2 the impression cylinder, and 3 a second cylinder for co-acting with the impression cylinder, and which may be either a plate carrying cylinder in a twocylinder press, or the transfer cylinder in an off-set press.

4 is the shaft of the upper feed rolls, one

. of which latter is shown at 5; and 6 is the shaft of the lower feed rolls, one of which is shown at 7.. These shafts, 4 and 6, are j'mounted at their ends in the housings 8 which. form portions of a sup lemental' frame which is detachably secure to press 5 frame 1 by bolted cap plates of said frame, one of which is shown at 9-. It will be understood that the housing 8 is the same at both sides of the machine. This supplemental frame forms the forward end of the support for the conveyer, portionsof which are shown at 10, by which the stock is carried from a support or feed table to the feed rolls. A tie rod 13 extending transversely of the press frame is held in cut outs of the latter by cap plates 9.

The upper feed-rolls 5 have effective pe- Fdiarneters, the remaining one half being cut -jaway or reduced. These upper feed-rolls and their shafts are intended to make one complete revolution in each operation, and when idle such rolls stand about in the position shown in Fig. 4 so that the cut-away ortion thereof will be directly above the ower feed-rolls. The object of providing the upper feed rolls with segmental peripllipassedbetween the upper and lower feedrolls and against stops 15 which are intend- .ed to be moved out of the way by known means, not shown, when the stock is being fed forward by the feed rolls. The latter must remain stationary during the greater portion of the cycle of operation of the press; and according to m invention they are given a variable spee that is to say,

when the upper feed-rolls en age the stock heir speed is less than that o the press cylinder in order not to mar or mark the stock, and avoid slippin between the rolls and the stock. As soon, owever, as the rolls have firmly taken hold of the stock their speed is increased and thus an accelerated motion will be imparted to the stock to enable it to be otherwise located provided its operation be timed with that of the impression cylintravel at a speed greater than the face speed of the cylinder and overtake the stops thereon. The point in the cycle of operation at which the accelerated motion is to be imparted to the feed-rolls is, according'to my invention, capable of being readily adjusted so" that the amount of overfeed, or the relative time at which the overfeed takes place, may're regulated.

The upper feed-roll shaft 4 has a one,

0- feed-roll and its shaft, I provide a toothed sector 25 whose. shaft 26 is mounted in the 'ipplemental frame, and an arm 27 of said shaft is connected by a link 28 to one end of a lever 30, the short arm of which carries a roller 31 which engages 1 Prime mover shown in the form of a cam disk 32 by which lever 30 is caused to move sector 25 in one direction such sector being moved in the opposite direction by the recoil action of a spring 35. When sector 25 is moved downwardl the pawl 21 upon enga ing the single too of ratchet 20 will e ectthe revolution of feed roll shaft 4 in the direction. indicated by arrow Y in Fig. 4. The completion of this revolution is coincident with the downward travel of the sector, and upon the return; stroke of the "latter the ,pawl carrier and the pawl are given a re? verse movement, the feed roll shafts remain-' 'ing idle. At the completion of thisreverse movement the pawl will lie .in close pr0x-1 imityto, but not in engagement with, the

single tooth of the. ratchet, so that the pawl will have a slight forward movement, in

" the next cycle of operation before engaging the tooth. The feed roll shafts 4 and 6 carry intermeshing pinions shown at 36,.

In order to make variable the speed of the feed rolls thecam 32 is of special formation, permitting the amount of overfeed or relativetime at which theoverfeed takes place,

to be varied. As stated, the cam forming the prime mover, is shown, as adjustably located on the shaft of theimpression cylinder. This is preferable, although it may der. This cam is so formed that it. will first ,im'p-art'a gradual movement/to the feed rolls which will be slower than the face speed of thereafter impart to the stock a. speed greater than the face speed of the cylinder ntents carrying the stops, such speed increasing until the stock arrives at the stops andthe. grippers carried by the cylinder close onto the stock to hold it to the cylinder. At this point the feed-rolls will release the stock but will continue to revolve until they have completed one revolution, when they will be again in the position shown 1n Fig. ,4. I have indicated by dotted lines in Fig. 1 the 'efiective area on the periphery of the prime Zmover which effects the downward stroke of the sector to cause one revolution of the upper feed-roll shaft. It will be noted that the cam disk 32 first ,acts gradually upon the lever 30, the initial movement of which, acting through the sector, causes the pawl carrier to travel the necessary distance to .permitthe pawlto engage the single tooth 10f disk" 20. The portion of the cam which so acts on the lever is indicated in Fig. 1 between the points A and B; at the point B the feed rolls start to turn; at-the'point C they begin to grip the stock; at the point p the stockarrives beneath the overhanging ends of the grippers of the impression cyl- Tinder; and at the'point E the stock arrives ,at the guides or stops, being overfed thereto at an accelerated speed, and the grippers "then close. At, the same time the effective ;portions of the peripheries of the upper feed-rolls disengage the stock. It will be noticedthat the most pronounced eccen- ;.tricity in the periphery of the cam is be" tween the points D andE where the necessary acceleration in thegtravel of the'stock guides or stops. The cam disk willscontinue to act on lever 30 until the upper feed-rolls 0S1, tion.".The cam then ceases to act on ever have been returned to; their starting the feed-rolls and their shafts, together with {the SuppIemental'frame, are detached and moved bodily away from the press frame.

It will be noted that the accelerated-motion of the feed-rolls may be imparted thereto at any predetermined point in theirrevolution; itbeing necessary merely to adjust the position of cam 32 relatively to the impression cylinder. In this way it is possible to 'vary the amount of overfeed as well as the time atjwhich it takes place. I After the effective portions'of the upper feed-rolls have dise'nga'ged'the stock, the remaining'one-halfrevolution'of such rolls 1043 ;;is required to eflect the overfeed to the can be performed ata comparatively longer a,

period of-time, and they can bebrought. to

rest gradually to insure bein correctly p0 sitioned for the next cycle o operation.

In many styles of printing presses it is desirous, for various reasons, to be able to remove the feed-rolls and their operating mechanism from the press. This, according to my invention, I am enabled to do, but without disturbing the prime mover, which should always be in fixed relation to the press cylinders. Upon withdrawing the feed-rolls and their supporting frame, it is immaterial whether or not the press cylinders be revolved during the time the feed rolls are being disengaged from the press, u since upon reconnecting the feed-rolls, their operation will be properly timed by the engement of the cam with the actuating ever. Hence the feed-rolls may be disconnected and again placed in position without any lost motion occurring between the driving shaft and the actuating mechanism of the feed-rolls. This is of decided advantage, since with such feed-rolls it is essential to obviate, as far as possible, all danger of lost motion.

I claim as my invention 1. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, and adjustable means for imparting a gradually increasing speed to the last mentioned means.

2. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, and means for imparting a gradually increasing speed to said feed-rolls.

3. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock "on said cylinder against said stops while the same is in motion, com- 5 prising two sets of feed-rolls, and means for imparting tosaid feed-rolls first a slow motion and then .an accelerated motion.

- 4. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, and adjustable means for imparting to said feed-rolls first a slow motion and then an accelerated motion.

5. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, shafts carrying said feed-rolls, a disk fast on the shaft of oneset of rolls, a pawl for engaging said disk at a single point, a pawl-carrier .loose on said latter shaft, and means forcompletely rotating said pawl member first in "one direction and then in the other once in each cycle of operation of the feed rollers, said pawl effecting a complete revolution of said disk and the feed roller shaft upon which it is mounted.

1,6. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, shafts carr mg said feed-rolls, gearing between said shafts, the rolls of one set having segmental effective peripheries, a disk fast on the shaft of the latter rolls, a pawl for engaging said disk at a single point, a pawl-carrier loose on said latter shaft, and means for reciprocating said pawl-carrier once in each cycle of operation of the feed-rolls.

7. In a printing press, a rotary cylinder provided with stops on. its periphery, means for feeding stock on said cylinder against said stops while the same is 1n motion, comprising two sets of feed-rolls, shafts carrying said feed-rolls, gearing between said shafts, a disk fast on the shaft of one set of rolls, said disk having a single tooth, a pawl for engaging said tooth, a pawl-carrier loose on said latter shaft, and means for completely rotating said pawlmember first in one direction and then in the other once in 5 each cycle of operation of the feed rollers, said pawl effecting a complete revolution of said disk and the feed roller shaft upon which it is mounted.

8. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, a separable frame supporting said feed-rolls and de- 95 tachably secured to the press frame, means for actuating the feed-rolls carried by said separable frame, and a prime mover for said actuating means carried by said cylinder.

9. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, a separable frame supporting said feed-rolls and detachably secured to the press frame, means for actuating the feed-rolls carried by said separable frame, and a prime mover for said actuating means carried by and adjustable relatively'to said cylinder.

10. In a printing press, a rotary cylinder provided with stops on its periphery, means for feeding stock .on said cylinder against said stops while the same is in motion, comprising two sets of feed-rolls, a separable 1'25 frame supporting said feed-rolls and detachably secured to the press frame, means for actuating the feed-rolls carried by said separable frame, and a cam disk movable with the press cylinder for impartingto said feed-rolls through said actuating means first a slow movement and then an accelerated travel.

11. In combination with a rotary cylinderprovided with stops on its periphery, means for feeding stock on said cylinder against saidgstops while the same is in" motion, comprising two sets' of feed-rolls, shafts carrying said feed-rolls, gearing between said said separable frame being detachably secured to the press frame, a cam operable with the press cylinder for actuating said lever in one direction, and a spring for moving said lever in the op osite direction,

In testimony whereo ,I have signed this specificationin the presence of two subscribing witnesses. I v I WALTER H. SMI'lEI-I.

Witnesses:

J. NOTA Mean, 0 C. G. PRITQHARD.

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