US573552A

US573552A - Machine for inking printing-plates

Info

Publication number: US573552A
Authority: US
Publication date: 1896-12-22
Anticipated expiration: 1913-12-22

Description

(No Model.) 7 Sheets-Sheet 1.

" J. P. STEVENS.'

MACHINE POR INKING PRINTING PLATES.

No. 573,552. Patented 1390.22, 1896.

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J. P. STEVENS( MACHINE FOR INKING PRINTING PLATES. No. 573,552. Patented D55. z2, 1895.

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J. P. STEVENS. MAGHlNE PoR INKING PRINTINGv PLATES. No. 573,552. Patented Deo. 22, 1896.

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No. 573,552. Patented Deo. 22, 1896.

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Patented Dec. 22, 1896.

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J. P. STEVENS. MACHINE FOR INKING. PRINTING PLATES. No. 573,552. Patented DB0. 22, 189e.

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J. P. STEVENS. MACHINE FOR INKING PRINTING PL'ATESf No. 573,552. APawnted Deo. 22, 1896.

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UNITED STATES PATENT OFFICE.

.IOSIAH PERCY STEVENS,

OF ATLANTA, GEORGIA.

MACHINE FOR INKING PRINTING-PLATES.

SPECIFICATION forming part of Letters Patent No. 573,552, dated December 22, 1896. Application filed November 25, 1895. Serial No. 570,145. (No'model.)

To @ZZ whom, it may concern:

Beit known that I, JosIAH PERCY STE vENs, a citizen of the United States, and a resident of Atlanta, in the county of Fulton and State of Georgia, have made a certain new and useful Improvement in Machines for Inking Printing-Plates; and I do hereby declare the following to be a full, clear, and' exact description of the invention, such as will enable thers skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters and figures of reference marked thereon, which form a part of this specification.

This device relates to means for inking and wiping the dies or plates in relief or plate printing machines.

ln the. accompanying drawings, Figure l is a front elevation of the device, showing most of the details, and in rudimental form a press is shown at the right-hand side. This figure shows the position of the parts at the time the impression is being made, the die being in the press. Fig. 2 is a back elevation showing the parts in the same position as shown in Fig. 1, but the back sides of the same. Fig. 3 is a back elevat-ion showing the position of the parts after the inking-roller shall have passed over the die once. The position of the parts shown in this figure is the reverse of their positions as shown in Figs. 1 and 2; that is to say, the operating-lever is at the opposite end of its stroke, as are all the movable parts. Fig. 4 is an end elevation showing the position shown in Figs. 1 and 2. This view is of the left-hand end of those figures, most of the details at the left end, and in addition a feeding-table and the top part of the press. Fig. 5 is a front view, somewhat enlarged, of the parts directly connected with wiping-pad, the position of said wiping-pad and its adj ustable plate bein g sh own by dotted lines. Fig. 6 is an end view of Fig. 5, also showing the wiping-pad and its plate. Fig. 7 is a sectional View on line 7 7, Fig. 5, being a bottom view of the pads and its connected parts. Fig. 8 is an' enlarged view from the left in Fig. 1 of the pivoted end of the arm that carries the wiping-pad and shows also Ithe vertically-sliding part to which it is pivoted and its adjusting-screw. Fig. 9 shows the free end of the lever that acts to hold and release the lever of the case that lifts the arm carrying the wiping-pad- Fig. 10 shows the side of the die-holder and the lever by which it is moved and its connecting-link. It also shows a portion of the press on which the guides are seated and stop to limit the movement of the die-holder. Fig. 11 is an end View of a die and its holder,bein g a view of the righthand end, as shown in Figs. 10, 12, 13, and 14, all of which figures, as well as 16, being enlarged. Fig. 12 is a section on line 12 12, Fig. 13. Fig. 13 is a top view of the die and die-holder, showing also the projection on its front side and the position of the spring by which lateral movement and rebound are prevented when in position in the press. This spring is also shown in Fig. 1. Fig. 14 is a section on line 14 14, Figs. 11 and 13, the die being left out to better show the inside construction of the holder. Fig. l5 is a crosssection on the line 15 15, Fig. 14. Fig. 16 is a perspective of the operating-lever. Fig. 17 is a side view of the ink-fountain, it and all the figures on this sheet being enlarged. Fig. 1S is an end View of Fig. 17. Fig. 19 is a partial View of a side of the ink-fountain opposite that shown in Fig. 17. Fig. 20 is a top View of the ink-fountain. Fig. 21 is a section on line 21 21, Fig. 20. Fig. 22 shows the adjustment as to length of the ink-roller-carrying arm. Fig. 23 shows the adjustable link connecting the ink-roller arm with its actuating-lever. This view shows the part as seen in Fig. 1.

The drawings represent the device as adapted to manual operation, but itis obvious that it may be easily adapted to power actuation. In the figures like reference-characters are uniformly employed in the designation of corresponding elements of construction.

A is a die-press which is merely employed j to typify a press of any character to which this device would be applicable, d being the bed, and d the plunger thereof.

1 is a base or bed plate, one end of which rests upon the bed o, the other end being supported by a leg 2 or other suitable means. A dovetail groove 3, as best shown in Figs. 4 and 6, is cut in this bed-plate 1, extending longitudinally alongthe top side thereof from under the plunger a to the distal extremity of the bed-plate. In this groove slides a carriage 4, adapted to have the printing-plate B secured to it, the lower side of the said carriage being provided with a correlative dovetail projection, as shown in Figs. 11 and 15. Figs. 10 to 15, inclusive, show this carriage to consist of a base 5, provided with an upwardly-projecting flange 6 around its four edges, the side flanges being provided with upwardly-projecting lips 7, having a space cut away in the center, as shown in Fig. 13. These lips 7 form, with the flanges 6, a guideway for the jaws 8 of a vise-like clamp, the notches in the lips 7 serving for the insertion and removalof said jaws. The working faces ot these jaws 8 are so shaped as to engage the corners of the printing die or plate, and said faces are inclined forwardly or undercut in such manner as to present an inclined face to each corner of the printing die or plate and cooperate with the correlative notches in said die, as will be presently seen. 9 are space-blocks adapted to be placed behind one of said jaws, and 10 are set-screws by means of which the other jaw may be forced against the die B, as seen in Figs. 11 and 13, notches, as shown, being cut in the corners of said die for purposes of better engagement, if deemed necessary. The working faces of the jaws 8 being inclined forwardly, the inclined lower faces of the notches in the die B coperate to force and hold the die downwardly against the upper face of the base 5 of the carriage or, in case the die is thin, against the liners used as a backing for the said die. A hard printing plate or die may be readily provid ed with these notches for securing and forcing downwardly by grinding, and being hard they could not be otherwise held with security. On the back side of the carriage is a pin 1l, and on the front side is a lug 12, for a purpose hereinafter set forth, and on the under side of the carriage are lugs 13, to which the arm 14 of the operating-lever l5 is attached by means of a pitman 16, said lugs 13 projecting downwardly through a slot in the bed-plate 1. (Shown in Figs. 4and 6.) In Figs. 1 and 10 is shown a stop for the carriage when same reaches its position under the plunger d', and consists of a strap 17, screwed to the end of the bed-plate 1 across the opening of the dovetail groove therein, and a set-screw 17 passing throughit, as seen in Figs. 1 and 13. The spring 18 bears upon the front end of the carriage, and the lug 12, engaging said spring when the die is in printing position, prevents lateral movement and also rebound of said die, thereby causing the centering of said die to be reliable.

The lever 15, as shown in Figs. 1, 4, and 16 most plainly, consists of a frame pivoted to the floor upon blocks 15', and having a lever 19 for manual operation, an arm 14, hereinbefore mentioned, and an arm 20, carrying on its upper end a spring-pressedlateh 21, operating as in connection with parts hereinafter set up.

In Figs. 17 to 21, inclusive, are shown the details of the ink-fountain, and in Fig. 1 same is shown in operative position. This ink-fountain consists of a box 22, which has a dovetail projection on its lower side fitting and adapted to slide in the groove in the bedplate 1 for purposes of adjustment. In suitable bearings on said box is journaled the shaft 23, and on this shaft, within the box, is a drum 24, which runs normally in the ink contained therein. A plate 24,mounted in the said box, serves to scrape any excess of ink from said drum. Quick-drying varnish being an element of inks used in die-printing,

a flange 25 is added to the plate 24 and projects downwardly below the surface of the ink and prevents any scale or floating particles of foreign substance from passing from the main body of the ink into a position to be gathered on the drum. Afxed to the shaft 23 is a sheave-wheel 26, which is dentated on one side, as shown in Figs. 17, 18, and 20, and a pawl 27 engages said dentations, preventing the revolution of the pulley, and hence of the drum 24, in any direction other than that indicated by the arrow 0c, Figs. 17, 21, and 19. As shown in Figs. 1, 4, and 1G, the lever 15 carries a pin 28, and a cord 29 is attached thereto, bearing a weight 30 on its other end and passing over the aforesaid sheave-wheel 26, by means of which construction the drum 24 is caused to rotate in the desired direction on a coi-relative movement of the said lever. The weight 30 slides on the lug 2 in its movements to prevent it from vibrating.

On the back edge of the bed-plate 1 are upwardly-projecting

flanges

31 and 32, respectively, near each end of the bed-plate, as shown most clearly in Figs. 2, 3, and 4, while nprights 33 and 33', carrying a transverselyextending bar 33/l on their tops, are secured to said flanges. Pivotally secured to the cross-bar 33 are stub-arms 34, which are slotted and have secured to them, by screws 34', passing through said slots, extensions 36, pins 37 serving to keep the stub-arms and extensions parallel. On the lower end of the arms 36 is an ink-roller 37 in the form of a roller, which should be covered with a fabric or substance which is elastic and will readily gather ink from the drum 24 and spread it upon the die or plate as same is brought into inking position, which is under the pivoted point of the arms 34. A weight 38 is connected to the arms 3G by a cord 39, which passes over a deilecting-sheave 40, journaled on the upright 33 or other convenient element. This weight serves to return the arms 36 to such a position that the ink-roller will contact with the drum 24 after it has been rolled across the die. The positions of the ink-roller wherein it gathers ink from the drum 24 and where it deposits same on the die are shown, respectively, in Figs. 1, 2, and 3.

It is necessary, now that the inking of the ink-roller and its return to a position to be resupplied with ink have been provided for, that I describe means for swinging the said ink-roller into position to ink the die, hold it there while the die is moving in contact with it, adjust its position so that it will not wipe ink over the corners of the die, and to allow the weight 38 to return to its normal position.

Passing through the flange 32 and provided with a journal-bearing box therein is a shaft 4l, as seen in Figs. 2, 3, 5, 6, and 7, carrying on its end, on the front side of said llange 32, a cam 42, and on its other (back) end a bellcrank lever 43, the lower end of which lever bears a roller 44, with which the latch 2l contacts to move the leverin the direction of the arrow y on Figs. 2 and 5 and into the position shown in Fig. 3, and the upper end of which lever is connected to the arm 36 by a pitman 45, between which pitrnan and said arms 36 there is lost motion, for a purpose hereinafter set forth. The carriage 4 recedes from the press to a constant point, but dies of a widely-differing size are employed wherewith to print, and as it is necessary to pull the arms 36 just a suftleient distance to move the length of the die, and no farther, in contact with said die the end of the slot against which the pin 46 rests while the arms 36 are being pulled away from the drum 24 and into and being held in inking position is made adjustable, as shown in Figs. 2 and 23, by means of a hooked bar 47, adapted to slide on the side of the pitman 45 and forming one side and the distal end of the slot and being held in any set position by means of the set-screws 48.

The device so far described will bring the ink-roller into position to ink the die, but will not hold it there during inking nor release it after inking and allow it to return to its normal position. Pivoted on a lug 49, projecting downwardly from the bed-plate l, is a lever 50, Figs. 2, 3, 5, 6, and 9, which has a shoulder 50', adapted to engage the lip 50" on the bell-crank lever and hold same as in the position shown in Fig. 3, and which said lever 50 is so carried and extended as to project its free end above said bed-plate, where it carries a latch l, as shown in Fig. 9, in the line of movement of the pin ll on the back side of the carriage, said latch being so arranged as to recede upon the passage of' the carriage toward the inking position and to receive the pin ll on its face 52 upon the return of said carriage toward the press, said face 52 being inclined to the line of motion of the said pin, and the latch remaining rigid on the latter-named motion of the carriage the lever 50 will be raised against the action of the spring 53 and release the engagement between the shoulder 50' and the lip 50, just above described. The weight 38 acts to move the ink-roller and its arm 36 to its normal position at a moderate speed, but the strong spring holding down the wiping-platen acts, as will be hereinafter seen, to move the bellcrank lever to the position shown in Fig. 5, and as the return action is very quick the lost motion is provided in the connection between the pitman and the arm 36, which has been heretofore mentioned, and which allows independent return motion of the bellcrank lever and the arm 36.

After the inking of the die it is necessary to wipe the ink from the face thereof and leave ink only in the intaglio portions thereof. I will now proceed to describe the wiping mechanism In the front side of the flange 3l is a vertically-disposed dovetail groove, and in this groove is seated and slides a correlatively-dovetailed plate 54, as seen in Figs. l and 8 most plainly, and to the face of this plate 54 is pivoted, by means of a strong pin 55, a lever 5G, (see Figs. l and 5 to 8, inclusive,) which isprovided on its free end with a sidewise and horizontally projecting plate (or foot) 57, as best shown in Figs. 5 and 6. A hole is cut in the flange 31, and through said hole and into a notch in the plate 54,'as shown in Figs. 3 and 8, passes the disk-like head of a set-screw 54', which is screwed into a lug 54 on the' back of said flange. By this means the height of that end of the lever -56 may be adjusted and the lower side of the plate 57 be caused to lie parallel to the bed-plate l when in operative position. This lever 56 rests upon the face of the cam 42 on the shaft 4l, and by the partial revolu tion of said shaft, as hereinbefore set forth, said lever will be moved upwardly asthe inkroller is brought down and the die-carrying carriage moved toward its inking position, and by a reversal of the movement of said cam and the action of the spring 53 the said lever will be forced downwardly upon the die-carriage starting on its backward movement and disengaging the lever from the bell-crank lever 43. The free end of the lever 56 is adjusted as toits point of depression by means of the following construction: In t-he face of the flange 32 is a dovetail groove, as shown in Figs. 5, 6, and 7, and into ICO IIO.

IIS

this groove is fitted a plate 58, said plate havv ing on its face at its lower end a lug 59, projecting under the end of the lever 56 in contact therewith, a plate 59, of indurated fiber or like substance, lying on top of said lug, and hence intervening between the lever 56 and said lug, said plate 58 being adjusted vertically by means 'of a screw 60, set in lug 61 on the flange 32 and passing its head through a hole in said flange and a notch in the back of said plate 58. On the face of said plate 58, near its upper end, is a lug 62, and through this lug passes a screw 63, a joint-nut 64 serving to hold same when set, and between the lower end of this screw and the upper side of said plate 57 is the aforesaid spring 53, the turning' of the screw G3 adjusting its tension.

On the lower side of the plate 57, near one edge, (the back edge in the form shown,) is a lug 65, and to this lug is hinged a plate G6, of metal. This plate 66 carries rollers 67 on its ends, and a screw GS passes through the plate 57 and engages the free edge of said plate 66, whereby said plate may be paralleled with the upper face of the die to be wiped. The screw 68 has a spherical knob 68 on the end of a small neck on its end, and a hole is drilled into the edge of the plate 66, the metal above said hole being slotted, so that the knob 68 being inserted in said hole, the neck lying in the said slot, the connection between vsaid screw 68 and plate 66 is a universal joint.

Considering the independent adjustment of the lever 56 and the plate 66, it is plain that the wiping-surface may be-separately adj usted, respectively, into longitudinal and transverse parallelism with the face of the die. On the face of the plate 66 is a rubber plate 66', suitably adhered and forming an elastic backing for the paper against which the die is wiped. A web of paper is interposed between the rubber plate 66 and the die being wiped and is held there during wiping, and moved to present a clean surface by means of the following construction: G9 is a roll of paper rotatably mounted on a pin 70 on an extension 7l of the cross-bar 33. From this roll the web passes through a controller 7 2, secured, in the construction shown, to the flange 32, around the roller (57, (right Fig. 1,) thence across the face of the plate 66, around the other roller, over a detlecting-roller 73, rotatably mounted on the ange 32,and thence between the drawing-

rollers

74 and 75, mounted on the upright 33 and a bracket 33"', secured thereto, as seen in Fig. 4. The roller 74 is driven a part or a whole of a revolution or more by means presently to be described, and the rollers 75 are geared thereto and pressed by the springs 7G into forcible contact with the roller 74 or the web therebetween. The paper passes from between these rollers along guide-frame 77, which also forms a take-olf in case any of the ink on the loweil side of the paper should yet be adhesive. .On the shaft of the roller 74, as shown in Fig. 4,

Yis an arm 7 8, carrying a pawl 79, and loosely mounted on said shaft is a pinion 80, Figs. 2, 3, and 4, on the hub of which is a ratchetwheel S1, the teeth of which are engaged by the pawl 79 in a direction which will cause the said shaft to be rotated by the movement of the pinion in one direction, while the rotation of the pinion in the other direction is free.

' As shown in Figs. 2, 3, and 4, a rack 82 engages the pinion 80, being held to such engagement by the clip 80', and is reciprocated by means of a lever S3, pivot-ed on the baseplate l and having one end extended to a position in the plane of the movement of the iinger 84 on the lever 15, wherein said finger will contact with and move said lever S2. A spring S4 acts to move the said lever S3 in the reverse direction, and a slotted gage-plate 85 serves to limit the movement of said lever 83, hence adjust the length of stroke of the rack 32 and the length of the peripheral movement of the

rollers

74 and 7 5, whereby just enough paper may be drawn from the roll as will wipe a die of the size then in use.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is-

l. In a printing-press, a press, a guideway, leading thereto, a die-carriage adapted to move thereon, a lever pivoted over and extending parallel to said guideway, and a presser-plate secured to the free end of said lever, means for feeding a web of paper across same, a shaft and a cam 'mounted on said shaft and bearing under said presser-plate and means for causing a partial rotation of said cam on the backward movement of the said die-carriage and of dropping said presserplate on the forward movement thereof.

2. In a printing-press, a press, a guideway, leading thereto, a die-carriage adapted to move thereon, a presser-plate over said guideway means for feeding a web of paper across same, a shaft and a cam mounted thereon and bearing under said presser-plate and means for causing a partial rotation of said cam on the backward movement of the said die-carriage and of dropping said presserplate on the forward movement thereof.

3. In a printing-press a press and a guideway leading thereto and a die-carriage movable on said guideway, a vertical fiange on said guideway, a plate movable therein, a lever pivotally secured to said plate and lying above the said guideway, a presserplate carried on the free end of said lever and means for causing a movement of said lever respectively downwardly and upwardly upon the advancement or recession of said die-carriage.

4. In a printing-press, a press, a guideway leading thereto, a die-carriage adapted to traverse same, a lever pivoted on a verticallymovable fulcrum, a presser-foot carried on the free end thereof over said guideway,.

means for feeding a strip of paper across said presser-foot, means for pressing-same downwardly and means for causing a downward and upward movement of said lever respectively on the advancement and recession of said die-carriage.

5. In a printing-press, a press a guideway leading thereto, a die-carriage adapted to slide thereon, a presser-plate mounted so as to have motion vertically over said guideway, a plate carrying a lip on its lower end projecting under said presser-plate and mounted so as to be movable vertically and means for holding same in any set position.

6. In a printing-press, a press, a guideway leading thereto, a presser-plate mounted so as to have motion vertically over said guide- IOO way, an upwardly-projecting flange on said guideway near said presser-foot, a plate carrying a lip on its lower end projecting under said presser-plate and mounted on said liange so as to be movable vertically and means for holding same in any set position, consisting of a disk-headed screw engaginga notch inl said vertically-movable plate and screwed into the base-plate of the machine.

7. In aprinting-press, a press, a guideway leading thereto, a die-carriage movable on said guideway, a presser-plate mounted so as to be movable vertically over said guideway, a plate movable vertically and carrying a lip on its lower end projecting under said presser-plate, a lug on its upper end and a spring interposed between said lng and the upper side of said presser-plate.

8. In a printing-press, a press and a guideway leading thereto, a die-carriage thereon, a lever mounted over said guideway and a presser-foot thereon, means for feeding paper to the under side of said presser-foot a shaft operatively.connected to said lever to. move same in a vertical plane, a lever connected to the carriage, and a latch thereon adapted to engage the lever on said shaft when carriage is being moved backwardly.

9. In a printing-press, a press and a guideway leading thereto, a die-carriage thereon a lever mounted over said guideway and a presser-foot thereon, means for feeding paper to the under side of said presser-foot, a shaft operatively connected to said lever to move same in a vertical plane, a lever on said shaft, a lever connected to the carriage and a latch thereon adapted to engage the lever on said shaft when the carriage is being moved backwardly, and a lever adapted to engage the lever on said shaft when elevated and eX- tended to contact with and be moved in a direction of disengagement by said carriage.

10. In a printing-press, a press and a guideway leading thereto, a die-carriage thereon, a lever mounted over said guideway and a presser-foot thereon, means for feeding paper to the under side of said presser-foot, a shaft operatively connected to said lever to move same in a vertical plane, a lever on said shaft having a lip on its free end, a lever connected to the carriage and a latch thereon adapted to engage the lever on said shaft when said carriage is being moved backwardly, and a lever having a shoulder adapted to engage the lip on the lever on the said shaft when elevated and extended to contact with and be moved by said carriage to disengagement.

ll. In a printing-press, a press and a guideway leading thereto, a die-carriage thereon having a pin projecting from its side, a lever mounted over said guideway and a presserfoot thereon, means for feeding paper to the under side of said presser-foot, a shaft operatively connected to said lever to move same in a vertical pla-11e, a lever on said shaft having a lip on its lower end, an operating-lever connected to said carriage and a latch thereon adapted to engage the lever on said shaft when moved to retract said carriage, and a trip-lever pivoted and lying parallel to the plane of movement of the lever on said shaft and having a shoulder adapted to engage the lip thereon, its free end being extended to a point above the edge of the guideway and carrying a latch provided with an inclined face and limited to movement in one direction from its normal position in the path of the movement of the pin on the carriage.

l2. In a printing-press, a press, a die-carriage, an operating-lever therefor, and a Wiping-plate, and means for drawing a web of paper across the same and rollers between which said web passes, a pinion connected to one of said rollers by an intermittent clutch mechanism, a rack engaging said pinion and means for operatively connecting said rack to 'a moving element of the device consisting of a curved lever fulcrumed on the frame, and connected at one end with said rack, its other end being extended into the plane of movement of said operating-lever, and finger on said operating-lever adapted 'tpgaageame, and an adjustable motion-limiting abutment for said curved lever.

13. In a printing-press, a guideway and a die-carriage movable thereon, means for wiping a die on same, an ink-fountain,-oscillating arms carryin ga roller on their ends adapted to carry same from contact with the die on its moving carriage and means for causing an oscillation of said arms consisting of a lever pressed to a normal position mounted on the frame, a slotted pitman connecting the upper end thereof with said arms, a lip on the lower end thereof, a notched lever adapted to engage said lip, and means for tripping the said notched lever on the movement forward of the die-carriage.

14. In a printing-press, a guideway and a die-carriage movable thereon, means for Wiping a die held on same, an ink-fountain, oscillating arms carrying a roller on their ends adapted to carry same from contact with the die on its moving carriage and means for causing oscillation of said arms consisting of a lever pressed to a normal position mounted on the frame, a slotted pitman connecting the upper end thereof with said arms, alip on the lower end thereof a notched lever adapted to engage said lip, and means for tripping the said notched lever on the movement forward of the die-carriage, and means for returning said arms to a position to press said roller against the ink-fountain consisting of a weighted cord attached to said arms and passing over a defleeting-pulley.

.15. In aprinting-press,the combination of a die having its corners beveled with upwardlyfacing facets, and a carriage therefor provided with jaws each having its workin g faces at an angle to each other and correlatively beveled and acting when approached to force the said die downwardly.

16. In a printing-press, a press, a guide- IOO IIO

Way leading thereto, a die-Carriage movable on said guideway to a point under said press and having an inclined-faced lug on its side, and a spring mounted on said press and adapted to bear on the side of said die-carriage, press same baokwardly and engage said lug, for the printing-press.

In testimony whereof Iv hereunto afx my sig-nature in presence oftrvo Witnesses.

J OSIAH PERCY STEVENS.

Ttnesses c A. P. VOOD, J. E. STEWART.