US811488A - Printing-press. - Google Patents

Description

No. 811,488, PATENTED JAN. 30, 1906.

T. B. DOOLEY. PRINTING PRESS.

APPLIUATION FILED APR. 10, 1903. 2 SHEETS-SHEET 1 W 2 2 H 2 \WMM gw/ yg 52;. mwaww.

I T. B. DOOLEY.

PRINTING PRESS;

APPLIOATION FILED APR.10, 1903.

PATENTED JAN. 30, 1906.

2 SHBETS-SHEET 2.

rrn s rarn ra'rn THOMAS E. DOOLEY, OF MALDEN, MASSACHUSETTS, ASSIGNOR TO I JOSEPH MIDDLEBY, JR, OF MALDEN, MASSACHUSETTS.

PRINTlNG PRESS- Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed April 10,1903. Serial No. 151,974.

To all 107mm 73/; may concern:

Be it known that I, THOMAS B. DOOLEY, a citizen of the United States, and a resident of Malden, in the county of MiddleseX and State of Massachusetts, have invented certain new and useful Improvements in Printing-Presses, of which the following is a specification.

, My improvements are herein shown and described as applied to a platen-press of the jobbing ty e, to which type of press the main features my invention are particularly applicable and include a novel platen and mechanism for operating the same, an adjusting throw-off, and certain other features hereinafter described, the principal object of my invention being to provide a high-speed press of the type referred to which shall be simpler and more compact in construction, as well as lighter and easier to run than prior presses of this type.

The inking mechanism which is herein shown and described in combination with the features above referred to for the purpose of showing a complete and operative press is not herein claimed, being described and claimed in a divisional application filed by me on the 16th day of September, 1903, Serial No. 173,406.

My improvements in their preferred form are illustrated in the accompanying drawings, in which" Figure 1 is an end elevation of a jobbingpress containing saidimprovements with a portion of one of its gears broken away. Fig. 2 is a top plan view of the press with portions of the inking-rollers and inking-table brokenaway. Fig. 3 is a vertical transverse section taken on the'line 3 3 of Fig. 2. Fig. 4 is a vertical longitudinal section through the press looking toward the rear thereof, the plane of section being indicated by the line l 4 in Fig. 3. Fig. 5 is a vertical transverse section through the ink-distributing table, showing also the adjacent parts by means of which it is operated. Fig. 6 is a fragmentary elevation of a portion of a shaft which operates the ink-distributing table. Fig. 7 is a side elevation, on an enlarged scale, showing one of the guides for the platencarrier. Fig. 8 is a side elevation of one of the plates which carries the typebed. Fig. 9 is a perspective View illustrating a portion of the platen and platencarrier. Fig. 10 is a section detail illustrating an adjustment of the platen-carrier. Fig. 11 is a detail perspective View of my throw'off, hereinafter described.

The framework of the press shown in the drawings comprises two end portions or up rights 2 2, which carry the working parts of the press and are connected by suitable tierods 3 and by said working parts. My press may be driven by any suitable means, but is herein illustrated as a foot-power press, being provided with a treadle 4, connected by a rod 5 with a crank 6, interposed in the transversely-extending shaft 7, the latter being journaled in the uprights-2 2 and suitably connected by gears or otherwise with the other Working parts.

On the inner side of each of the uprights 2 2 is secured a supplementary supportingplate 8, the shape of which is shown in detail in Fig. 8, said plates 8 8 being spaced away from the uprights 2 2 for a purpose hereinafter described. Each plate 8 is preferably provided. with a hub 9, cast integraltherewith and adapted to pass through and fit a socket 10, formed in the corresponding upright 2, the plate 8 being bolted to said upright by bolts located adjacent to said hub, as indicated in Fig. 8. The result of this construction is that the plates 8 are supported at and near their central portions only, and in order to provide the desired space between each plate 8 and the adjacent upright 2 the walls of the corresponding socket 10 are eX- tended inward or toward the plate 8 a short distance and engage a stop-face formed at the base of the hub 9, as best shown in Fig. 4c. The front edges of the plates 8 8 are joined by a strong vertical cross-plate 11, which serves as the type-bed and is adapted to receive and hold a form of type on its front face in any suitable manner.

Within the space left between each plate 8 and the adjacent upright 2 is located a pair of sprocket- wheels 12 and 13, one such pair of sprockets being thus provided at each end of the press. The upper sprockets 12 are journaled 011 studs 14, carried by the corresponding uprights 2, and the lower sprockets 13 are keyed. to a transvcrsely-extending shaft 15, journaled in one of the uprights 2 and in a bearing 16, secured to the opposite plate 8.

This shaft 15 is provided on its outer end with a gear 1 7, meshing with a gear 18, secured to the driving-shaft 7. Around each pan: of sprockets passes a SPIOCliGlJ-Olldlll 19, which carries a suitable number of inking-rollers 20, four of such rollers being shown in the drawings.

Between the upper and lower pairs of the sprocket-wheels and at the rear of the machine is located a vertical ink-distributing table in such position that the travel of said sprocketchain will carry the inking-rollers over' said inking-table in contact with its rear or outer surface. Briefly described, this ink-distributing table which is claimed in my. divisional application above referred to consists of a stationary vertical frame 25, secured at its ends to the rear edges of the plates 8 and provided with a number of parallel horizontal slots 26, in each of which aplate 27 is mounted to slide lengthwise of the slotthat is to say, transversely of the machine. The outer faces of these plates are flush with the outer face of the frame 25, and the plates 27 are kept from falling laterally out of said frame, as by making the adjacent edges of said plates and the slots 26 V-shaped, so that-one fits within the other and slides therein. The distributing of the ink is accomplished by reciprocating the plates 27 in an endwise direction, to which end each of said plates is provided with a rack 28, meshing with a pinion 29, secured to the frame 25, each pinion meshing with the racks on two of the plates, so that by the reciprocation of either plate 27 the adjacent plate or plates will be moved correspondingly, but in the opposite direction. One of the plates 27 is positively reciprocated by means of a shaft 30, having a cam-groove 31 cut in its surface, in which groove is located a traveler 32, se cured to said plate 27. The cam-groove 31 is composed on one side of the shaft of two inclined portions, which cross each other, and on the other side of said shaft the adjacent ends of these inclined portions are connected by circumferential portions, as best shown in Fig. 6, so that the traveler 32 dwells momentarily at the limit of its movement in either direction. As shown in Fig. 5, the traveler 32 is composed of a stem 33, mounted to turn in a boss 34, secured to the middle plate 27, and 35 is a finger secured to said stem and having its free end fitted to travel in the camgroove 31. '36 is a stop-screw threaded into the boss 34 and adapted to hold the traveler in place in the cam-groove. It is to be understood that any other suitable inking mechanism may be used in connection with the remaining features of my press. The shaft 30 may also serve to operate the platen, as hereinafter described, and to this end is journaled in the hubs 9, formed on the plates 8, and extends through said hubs at each end of the machine, at one of which ends it is provided with means whereby it may be rotated, such as a gear 37, connected by gears 38 and 39 with'a pinion secured to the main driving-shaft 7. This arrangement for journalingsaid shaft 30 forms one of the features of my construction,

as it provides a suitable bearing for said shaft without making it necessary to form journalboxes in the uprights 2 2 and at the same time increases the strength and stability of the parts of the machine.

' The platen on which the sheets to be printed are placed and carried to the type preferably comprises a shell 40, having its face recessed to receive the plate or platen proper, 41,which is held therein by a screw-bolt 42, Fig. 3, and is justified by means of four bolts 43, bearing on said platen proper, 41, near its corners. It is customary to cover the working face of the platen with a sheet of heavy paper, and to this end the edges of the plate 41 may be recessed, as at 44, Fig. 9, to receive a frame 45, the sheet of paper (not shown) being secured to the plate by removing the frame 45, laying the sheet on the plate with its edges projecting over the recessed portion 44, and then forcing said frame into place, thereby turning the edges of the sheet downward and clamping them between said frame and plate. The shell 'is provided with strong laterally extending hubs 46, Fig. 2, which project over horizontal forwardly-extending portions 47 of the uprights 2 2, and a rod 48 passes through said hubs and projects therefrom at each end of the machine. There is also secured to each of said hubs an arm 49, Fig. 7, having its outer or free end provided with a slot 50, extending substantially at right angles to the working face of the platen and containing a block 51, which is arranged to slide therein, and is pressed toward the outer end of said slot by a spring 52. Each block 51 is perforated to receive and'turn on the end of a fixed pin 53, secured to the corresponding upright 2, and each end of the rod 48 is connected bya rod 54 with reciprocating means, such as crank-pins 55, carried, respectively, by the gear 37, and by a corresponding wheel 56, secured to the other end of the shaft 30. 57 represents sprin s extending from the lower portion of the ,shel 40 to convenient fixed points on the framework of the machine and normally in a state of compression, so that they tend to force the platen upward. The platen is also provided with fingers or grippers 58 for holding the sheets to be printed against its working face. These fingers may be of any usual construction and are not specifically described herein, as they form no part of my invention.

The parts just described are proportioned and arranged to operate as follows: Starting from the position shown in Fig. 1, it will be seen that when in this position the platen has its working face uppermost and nearly horizontal, in convenient position to receive a sheet to be printed. Assuming that such'a sheet has been placed upon it and that the shaft 30 is then rotated, the first result of such rotation is to draw the rod 48, and with it the shell 40 and platen proper, 41, toward impression is taken.

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the type-bed, said platen and connected parts turning on the pins 53 as an axis and being supported by the springs 52 and also to an increasing extent by the springs 57. This turning of the shell 40 continues until its hubs 46 come in contact with the flat guidingsurfaces formed by the upper edges of the portions 47 of the uprights 2 2, the sprin s 57 acting as a cushion and preventing any shock or jar. As soon as said hubs have come in contact with said guiding-surfaces the latter and the sides of the slots 50 form parallel guides, which hold the platen with its working face vertical and permit a sliding movement thereof toward the type-bed, which movement is produced by a continued rotation of the shaft 30 until the sheet to be printed is brought against the type and the This position is shown in Fig. 3 and corresponds to that position of the shaft 30 in which the pins are in their extreme right-hand position. The reverse movement of the platen then commences as the shaft 30 continues to rotate, the first result of such movement being to push the platen horizontally away from the type-bed until adjustable bolts 59, carried by the arms 49, come in contact with the ends of the blocks 51, whereupon the shell 40 and connected parts turn on the pins 53 as an axis and are lifted from the guiding-surfaces 47 and brought back to the position shown in Fig. 1, with the working surface of the platen in convenient position. for the removal of the printed sheet and the substitution of an unprinted one. It will be understood that dur ing these movements the sprocket-chains 19, carrying the inking-rollers 20, are driven continuously and. the driving-gears are so proportioned that said rollers pass once around the sprocket-wheels during each cycle of op erations of the platen. The inking-rollers are also so located on the sprocket-chains that they pass over the form of type just before an impression is taken. When the platen is drawn toward the type-form, just before it reaches the latter the inking-rollers pass over the type, and while the platen is returning to the position shown in Fig. 1 the inking-rollers pass over the distributingtable. The shape of the cam-groove 31 is such that it takes two rotations of the shaft 30 to give the plates 27 a complete reciprocation in both directions, and the straight or circumferential portions of said slot 31 are so located that said plates 27 are stationary at the times when the inking-rollers are passing over them, the distribution of the ink being thus accomplished in an obvious manner.

It will be seen that my construction provides for a strictly parallel movement of the platen toward and from the type just before and after the impression, that all the movements of the platen are confined to a small space andproduced by simple means, and

that the platen when receiving a sheet has its working face in a most convenient and. accessible position for this purpose.

It is desirable to provide for a dwell of the platen while the printed sheet is being removed and replaced, and to this end I prefer to operate said platen through a pair of selflocking mutilated gears, the gears 37 and 38 being shown as of this construction and the desired dwell being provided for by omitting a suiiicient number of teeth from the gear 38, so that no movement of the gear 37 can occur during this portion of the rotation of said gear 38.

In order to prevent any possibility of blurring the impressions, I prefer to provide locking devices consisting of plates 59, one at each end of the machine, which plates may i be cast in one piece with the uprights 2, respectively, and are each provided with a notch 60, adapted to receive and fit the edge of a rib or flange 61, cast on the shell 40, one at each end thereof. When the platen is moved toward the type-bed, the flanges 61 enter the notches 60 and are held thereby at the instant when the impression is taken against any vertical movement in either di rection, thus preventing any possible lateral slip of the platen with respect to the face of the type.

It will be seen by referring to Figs. 10 and 2 that the side edges 62 of the shell 40 are flush with the plane of the working surface of the platen. proper, 41, and that the side edges 63 of the cross-plate 11, which holds the form of type,are also substantially flush with the level of the surface of the type, so that, as shown in Fig. 2, when the impression is being taken the side edges of the platen and the plate 11 are in contact with each other, or practically so, and thus act as a stop to limit the depth of the impression taken from the type. This arrangement is important and useful where the type-form contains but few type, in which case it has been found in the use of prior presses that the type is apt to cut the sheet or to give too deep an impression. With my construction the platen may be so adjusted that the depth of the impression can never be excessive, regardless of the number of type being printed from. For adjusting the platen as just described I prefer to make the rod 48 capable of turning in the hubs 46 as bearings, and I provide it at each end with an eccentric pin 64, which carries the corresponding rod 54, as shown in Fig. 10. As thus constructed the hubs 46 and connected parts maybe adjusted withrespect to the rods 54 by turning the rod 48 with respect to said hubs, thus providing for the desired adjustment of the platen with respect to the type bed; It will be evident that by turning the rod 48 in a direction to move the platen away from the type-bed the effect of a throw-ofi will be obtained, and for utilizing this feature IIC as a throw-off and also for adjusting the platen with delicacy I have shown in Figs. 2 and 11 an arm 65, rigidly secured to the extended outer end of one of the pins 64 and provided with a pivoted locking-finger 66, having an operating-handle 67 and adapted to enter a notch 68 in a ring 69, which ring is mounted to turn on the corresponding hub 46 and is locked in any desired position on said hub by means of a set-screw70 passing through a circumferential slot in said ring. By turning the rod 48 the platen is accurately adjusted to the proper position with respect to the type-bed, and the ring 69 is then adjusted to such position that the locking-finger 66 will enter the notch in said ring, which ring is then firmly clamped to the hub 46 by its set-screw 70. The handle 67 may now be utilized as a throw-off by disengaging its locking-finger 66 from the notch 68, and the parts may be quickly and easily restored to the position of proper adjustment by moving said handle until said locking-finger 66 is again in position to enter the notch 68. The handle 67 is shown as provided with a stop-finger 71, which limits its pivotal movement and enables the arm to be readily operated thereby.

The various features of my invention, although particularly adapted and intended to be used in combination, may be used independently of one another to a certain extent and may be variously modified without departing from myinvention, as will be evident.

I claim 1. In a printing-press, the combination of a platen-carrier, parallel guides therefor, extending at right angles to its working face, pivots cooperating with said guides and providing stops to limit the rearward movement of the carrier, and means for reciprocating said carrier on its guides and turning it in an arc of a circle having said pivots as a fixed central axis.

2. In a printing-press, the combination of a platencarrier, parallel guides therefor, extending at right angles to its working face, pivotscoiiperating with said guides and pro viding stops to limit the rearward movement of the carrier, springs interposed between the pivots and the ends of the corresponding guides for cushioning the carrier, and means forreciprocating said carrier on its guides and turning it on said pivots as a central axis.

3. In a printing-press, the combination of a platen-carrier having slotted arms forming guides, relatively fixed pivotal devices arranged to slide in the'slots of said arms respectively and providing stops to limit the rearward movement of the carrier, supplementary guides for said carrier arranged to operate in parallelism with said slots, and means for reciprocating said carrier on the latter guides and for turning it in an arc of a circle having said pivotal devices as a central axis.

4. In a printing-press, the combination of a platen-carrier and guides on which said carrier is adapted to slide at right angles to its working face, arms secured to said carrier and provided respectively with slots, blocks mounted to slide in said slots and journaled on fixed pivots respectively, said blocks forming stops to limit the rearward sliding movement of the carrier, and means for reciprocating said carrier on said guides and for turn ing it on said pivots as a central axis.

5. In a pr1nting-press,the combination ofa platen-carrier and guides on which said carrier is adapted to slide at right angles to its working face, arms secured to said carrier and provided respectively with slots, blocks mounted to slide in said slots and journaled on fixed pivots respectively, said blocks forming stops to limit the rearward sliding movement of the carrier, a spring interposed between each block and the forward end of the corresponding slot, and means for reciprocating the carrier and for turning it on said pivots as a central axis.

6. In a printing-press, the combination with a type bed having forwardly-turned edges, of a platen-carrier movable toward and from the type-bed and having edges adapted to abut against the edges of the type-bed when in the impression position, a platen carried by sald carrier and means for adjusting said platen.

7. In a printing-press, the combination with a type-bed having forwardly-turned edges, of a platen-carrier movable toward and from the type-bed and having edges adapted to abut against the edges of the type-bed when in the impression position, a platen carried by said carrier, a rod or shaft journaled in said carrier and provided at its ends with eccentrically-mounted pins, and means connected to said pins for reciprocating said carrier.

8. In a printing-press, the combination with a type-bed having forwardly-turned edges, of a platen-carrier movable toward and from the bed and having edges adapted to abut against the edges of the type-bed when in the impression position, a platen carried by said carrier, a rod or shaft journaled in said carrier and provided at its ends with eccentrically-mounted pins, means connected to said pins for reciprocating said carrier, and a throw-off lever connected to one of said pms.

9. In a printing-press,the combination of a platen-carrier, a rod j ournaled therein, means connected eccentrically to said rod for operating the carrier, an arm rigidly connected to said rod and having an operating-handle pivoted thereto, said handle being provided with a locking-finger, and a ring adjustably mounted on said carrier and provided with a notch adapted to receive said locking-finger.

10. In a printing-press,the combination of a platen-carrier, a rod j ournaled therein and IIC err-1,488

provided at its ends 'wlth eccentricallymounted pins, means connected to said pins for reciprocating said carrier, a ring adjustably mounted on said carrier and provided with a notch, and a lever connected to the said rod and provided with a lockingfinger adapted to engage said notch.

11. In a printing-press,the combination of a platen-carrier and guides therefor, said guides permitting a sliding movement of the carrier toward and from the type-bed, pivots cooperating with said guides and providing stops to limit the rearward movement of the carrier, and means for reciprocating said carrier on its guides and turning it on said pivots as a central axis, said means comprising a pair of intermittent self-locking gears,means for driving one of them, and crank-rods connecting the driven gear with the platen-car- Her.

12. In a printing-press, the combination with a platen-carrier and guides therefor, of pivots cooperating with said guides and providing for a turning movement of said carrier, springs 52 interposed between said pivots and one end of the guides, and means for operating the carrier.

13. In a printing-press, the combination of a platen-carrier mounted. to slide toward and from the type-bed and to turn on piv'ots at a distance from said type-bed, means for operating said carrier, and springs 57 for supporting the latter, substantially as described.

14. In a printing press, the combination with a platen-carrier mounted to slide toward and from the type-bed and to turn face upward at a distance from said type-bed, of means for operating said carrier comprising intermittent self-locking gears and crankrods connecting the driven gear with the carmen In testimony whereof I have hereunto subscribed my name this 7th day of April, 1903.

THOMAS B. D'OOLE Y.

Witnesses:

THos. K. KEITH, E. D. CHADWIeK.

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