US749983A - No model - Google Patents

Description

No. 749,983. 4 PATBNTED JAN. 19, 1904'.

- A. B'. DICK.

STENCIL PRINTING MACHINE.

APPLIOATION FILED AUG. 1, 1903, im MODEL. 2 sums-sum 1.

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No. 749,983. PATENTED JAN. 19, 1904'.

. A. DICK.

STENCIL PRINTING MACHINE.

APPLICATION FILED AUG.,1,1903. v no MODEL. 2 SHEETS-SHEET 2.

dine M 6- 3 Ma fl/tmmm UNITED STATES Patented January 19, 1904.

PATENT OFFICE.

ALBERT B. DICK, OF CHICAGO, ILLINOIS, ASSIGNOR TO A. B. DICK COM- PANY, OF CHICAGO, ILLINOIS,

A CORPORATION OF ILLINOIS.

STENCIL-PRINTING MACHINE.

SPECIFICATION forming part of Letters Patent No. 749,983, dated January 19, 1904.

Annlicatinn filed August 1, 1903.

To all whom it may concern: 7

Be it known that I, ALBERT B. DIoK, a citizen of the-United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Stencil-Printing Machines, of which the following is a description.

This invention relates to that class of duplicating apparatus in which are employed aperforated drum mounted in suitable heads, a,

stencil-sheet on the periphery of said drum, and means for imparting movement to said drum in order to bring the surface of the stencil upon the same in contact with the impression-paper to be printed upon.

The object of the invention is to simplify the'construction of apparatus of this general type and to increase its efiiciency, particularly with regard to the means employed for properly locating the impression-paper relatively to the drum, for stripping such paper from the drum after it has been printed upon, for moving the pressure-roller by means whereof said sheet is pressed against the drum into and out of operative position, and for securing the neat and orderly delivery of the impressionpaper from the machine after the printing operation.

In carrying out this invention I provide a perforated drum mounted in suitable heads, the whole being rotated (or oscillated) by any suitable mechanism-as, for instance, a crankarm and gearing. Below this drum I employ a pressure-roller mounted upon hinged arms and acted upon by springs tending to force said pressure-roller upward and into contact with said drum. In conjunction with these hinged arms I employ a shaft extending through the frame of the machine and provided with a handpiece for throwing the impression-roller into and out of operative position. Said shaft is provided near each end with cams, which upon turning said handpiece simultaneously act upon said hinged arms, thereby depressing said impressionroller (or moving it out of operative relation to the drum) smoothly and uniformly from end to end, the depressing effect of the cams Serial No. 167,900. (No modeL') .being applied simultaneously and to both of the hinged arms in which the roller is mounted. An automatically-operating combined paper stop and stripper is employed, which is' preferably actuated by an appurtenance of the drum, consisting in a preferred form of a cam coacting with a lever to tilt the combined paper stop and stripper, so that in one position it shalllie in position to determine the degree of forward traverse of the impressionpaper and thereafter shall occupy a position where it will strip said paper from the periphery of the drum (to which it would otherwise stick) and cause it to pass out of the machine. As such sheet is stripped from the periphery of the drum it falls upon a delivery-plate, the" upper surface whereof is concave in form, thereby giving similar curvature to the sheet as it passes from the machine. Due to this the sheet will not fold or roll transversely, the longitudinal depression formed therein by such concave delivery-plate assuring its passage out of the machine'and into the papertray in substantially flat form.

The invention is illustrated in the accompanying drawings, in which I have illustrated a form in which the improved apparatus may be advantageously employed in connection with certain automatic paper-feeding apparatus devised by me, and which has been made the subject of another application filed concurrently herewith.

In said drawings, Figure 1 is a side elevation of a" stencil-duplicating machine embodying my invention. Fig. 2 is a' vertical central section of the main portion thereof, including the parts above referred to and illustrating the combined paper stop and stripper in'stripping position. illustrating the manner in which the drum is mounted in the side frame. Fig. 4 is a vertical central section similar to Fig. 2, but illustrating the combined paper stop and stripper in paper-stopping position and the recording mechanism being omitted.v Fig. 5 is a perspective view illustrating the delivery-board over which the sheets are fed to the receiving-- tray.

Fig. 3 is a sectional detail Referring to the drawings, in which similar letters denote corresponding parts, A desig nates the side members of the frame provided with upwardly-extending arms or brackets 60, in which is mounted the drum B. This drum is here shown as comprising the heads C, united by a perforated diaphragm D, over which the stencil-sheet may be placed, as hereinafter described. The heads C are mounted in short shaft-sections c, journaled in the upwardly-extending arms or brackets a.

E designates a gear mounted upon a boss a, secured to or formed integral with one of the upwardly-extending arms or brackets a. The shaft-section 0, upon which the head C is mounted, extends through this boss and into an orifice in the center of said head. Said shaft-section c is provided with theannular groove 0 into which projects the head of the set-screw c entering the upper end of the arm or bracket a, as clearly shown in Fig. 3.

F designates a connecting-screw, threaded near its head for engagement with a correspondingly-threaded orifice in the gear E and provided at its end with a tooth f, coacting with an orifice of corresponding size in the head 0, this giving to said head a movement upon the shaft-section 0 corresponding with the movement of said gear E.

Gr designates a gear, also mounted in the upwardly-extending arm or bracket (4 andmeshing with the gear E.

H designates a crank-arm, here shown as provided with handle it and mounted upon and secured to the shaft of the gear G and by means whereof motion is transmitted to said gear, the gear E, and the drum.

I designates the pressure-roller, between which and the drum the paper is passed to be printed upon by the stencil on said drum. Said roller, the periphery whereof is preferably of rubber, is carried by a shaft i,the ends whereof are supported in journals carried by or formed integral with hinged arms J, pivoted at y to the inner surface of the side members A of the frame. Said journals are open at their upper portions in order that the shaft 2' may be dropped therein or removed therefrom at will. The end of each of the arms J is curved clownward and backward, as shown at j, for coaction with cams K, carried by the shaft in, the ends of said shaft being journaled in the side members A of the frame. One end of said shaft extends through one of the side mem bers A and is provided outside such side member with a handpiece k, by means whereof said shaft A and the cams K carried thereby may be rotated. As will readily be seen, said cams K in being rotated by the shaft Z; coact with the downwardly-curved portions j of the hinged arms J to depress said arms, and therefore the impression-roller I mounted therein.

L designates a coil-spring, there being one of these for each of the hinged arms J. One end of each of the coil-springs L is secured to .the frame.

the free end of a hinged arm J, its other end being secured to an adjusting-screw, whereby the tension of said spring may be varied. These springs L tend to raise the spring-arms J and therefore to keep the impression-roller I in engagement with the surface of the drum when the cams are in the position in which they are illustrated in Figs. 2 and 3.

M designates the combined paper stop and stripper. In a preferred form of this, such as that illustrated in the drawings, a bar m is employed, the ends whereof are mounted in the side members A of the frame. Intermediate of its ends and either secured to or formed integral with the said bar are arms m, (here shown as two in number,) extending toward and terminating in close proximity to the impression-roller I. These arms are provided with downwardly-extending webs,the extreme edges m whereof are approximately vertical. At the upper and lower angular corners each of the arms is provided with a star-wheel 172. the purpose whereof will presently be described. I prefer that the upper angular corner shall extend somewhat in advance of the approximately vertical edge m in order that the sheet of paper fed into the machine shall have its forward movement (before printing) terminated by engagement with said edge m and be precluded from riding over the upper angular corner bearing the star-wheel m N designates a spring at each side of the machine, the lower end whereof is suitably secured to the frame and the upper end whereof is secured to the under side of the bar m at one side of the pivotal point of the latter, said springs exerting a downward pull upon said bar to throw the arms m into paper-stripping position, Fig. 4.

O designates a rocking lever for the combined paper stop and stripper. This is pivoted intermediate of its ends at 0. The end 0 of the rocking lever 0 lies under and coacts with the edge of the bar m, so that when this end is elevated said bar and its attached or integral arms m are raised to paper-stopping position, in which they are shown in Fig. 2. The other end of said rocking lever O is provided with a sheave 0 lying in the path of movement of a cam P, secured to the edge of the head C of the drum.

R designates a paper-delivery plate. This may be of wood and secured to the base S of the machine or of sheetsteel having angularends for attachment to the side members A of the frame. It is shown in the drawings as a block having perforations '1' for attachment to the base S of the machine and ears 1* extending under the ends of the side members A of Intermediate of its ends said dclivery-plate is provided with the concavity r. The exact shape and degree of curvature of this concavity are immaterial, the object being merely to impart approximately similar curvature to the sheets of paper as they are ency to fold or roll transversely.

delivery-tray. (The latternotshown.) Heretofore difficulty has been experienced in-the delivery of these sheets, owing to their tendoccurs with one sheet, the succeeding sheet fed into the receiving-tray is liable to fall on the rounding surface of the sheet below and to slide therefrom to the floor instead of being received and retained in said tray.

. T designates a cyclometer, here shown as secured ;to one of the side members A of the frame and having its operating-shaft or pintle t extending inward toward the drum of the machine. I

t designates a lever connected with said shaft t, its upper end extending into the path of movement of a pin t upon the side of the gear E. a

t designates a coil-spring, the lower end whereofis secured to the side member A of the frame, the upper end thereof being secured tosaid lever t below its pivotal point. As will readily be seen, the coaction of the pin t? and the upper end of the lever t will rock or partially rotate the actuating-shaft or pintle t'of the cyclometer, thereby causing the proper registration of the number of movements of said drum.

t designates a link the lower end whereof is pivoted at t to one of the hinged impression-roller arms J, its upper end being pivoted at t to the lever 6 above the pivotal point of the latter. It therefore follows that when the handpiece for actuating the impressionroller is thrown to move said roller to inoperative position (out of contact with the drum) the downward movement of the hinged arm J will, by means of the link 2?, rock the lever zi upon its pivotal point, so as to throw the up per end thereof out of the path of travel of the pin t on the gear E. It follows, therefore, that when the impression-roller is in inoperative position (as when inking the drum, oiling, &c.) the cyclometer is not in operative relation to the mechanism and thatonly upon throwing the handpiece so as to raise said impression-roller to operative position will said cyclometer again be brought into operative re- Y lation to the mechanism.

In operation the periphery of the drum is preferably provided with a pad, which may be secured in place by cross-rods engaging with recesses in the heads 0. Over this the stencil is attached in any suitable manner. The ink may be applied to the interior of the drum either by a brush, an inking-roller, or other means. Obviously when the impression-paper and the stencil arebrought into contact under pressure ink will be forced through the writing on such stencil and upon such paper in the usual manner. In accomplishing this result by means of the apparatus hereinbefore described the-handpiece 7c of the pressure-roller mechanism is moved to When this the positionin which it is illustrated in the drawings, thereby elevating such roller to operative position relatively to the drum. Said drum is then rotated and simultaneously the sheetsof impression-paper fed successively down the feed-board and toward "the printing mechanism. The construction and arrange ment of the combined paper stop and stripper aresuch that when the stencil-covered surface of the drum is out of operative relation to the pressure-rollerthat is, during the time that the sheets are being fed into the machinesaid combined stop and stripper will assume its paper-stopping position, as shown in Fig. 2, being brought to this position by the coaction of the cam P with the sheave 0 In this position the vertical edge m of the stop directly opposes the passage of the impression-paper through the machine- Said with the sheave 0 of the rocking lever O,

whereupon under the influence of the spring N the combined stop and stripper is permitted to assume stripping position, as shown in Fig. 4. Here the forward free ends of the arms m are depressed, so that the upper starwheels shall lie between the drum ,andthe advancing forward edge of the sheet, thereby preventing the latter from adhering to the former. But for the star-wheels the printed surface of the sheet would be brought into contact with the forward ends of the arms m. This would streak the printed surface along the lines of impact. Thestar-wheels, however, keep these surfaces out of contact, and

therefore avoid injury to the printed surface.

As the printed sheet passes out from between the strippers and the pressure-roller it falls upon the delivery-plate R, the concavity r in which imparts a corresponding longitudinal curvature to the sheet, whereby the latter is permitted to pass out of the machine and into the paper-tray smoothly and without folding'transversely or doubling.

While the pressure-roller is in operative position, as illustrated in the drawings, each time the drum is rotated the pin t on the gear E is brought into contact with the lever t of the cyclometer T. Since each rotation of the drum results in the production of a print from the stencil carried thereby, the number of prints so produced may readily be determined at any time by the means described.

Having-now described my invention, what I claim as new, and desire to secure byLetters Patent, isg 1. In a stencil-printing machine, the combination with a stencil and means for supporting and moving the same, of a combined paper stop and stripper in operative relation thereto, substantially as set forth.

2. In a stencil-printing machine, the combination with a stencil and means for supporting and moving the same, of a combined paper stop and stripper in operative relation thereto, and means for moving the same to paper-stopping and paper-stripping positions, substantially as set forth.

3. In a stencil-printing machine, the combination with a stencil and means for supporting and moving the same, of a combined paper stop and stripper in operative relation thereto, and means for automatically moving the same to paper-stopping and paper-stripping positions, substantially as set forth.

4. In a stencil-printing machine, the combination with a stencil and means for supporting and moving the same, of a combined paper stop and stripper in operative relation thereto, and means controlled by the stencil supporting and moving mechanism for operating the same, substantially as set forth.

5. In a stencil-printing machine, the combination with a frame, of a stencil-carrier and means for operating the same, a combined paper stop and stripper mounted in said frame and mechanism for moving the same to stop ping and stripping positions, substantially as set forth.

6. In a stencil-printing machine,the combination with a frame, of a stencil-carrier and means for operating the same, a combined paper stop and stripper pivotally mounted in said frame and mechanism for moving the same to stopping and stripping positions, substantially as set forth.

7. In a stencil-printing machine, the combination with a frame, of a stencil-carrier and means for operating the same, a combined paper stop and stripper, and operative connections between the same and said stencil-carrier and its operating means, substantially as set forth.

8. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising movable arms in juxtaposition to said stencil-carrier and means for operating said arms, substantially as set forth.

9. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising pivotally-mounted arms in juxtaposition to said stencil-carrier and means for operating said arms, substantially as set forth.

10. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising pivotally-mounted arms in juxtaposition to said stencil-carrier and provided with star-wheels and means for operating said arms, substantially as set forth.

11. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising movable arms in juxtaposition to said stencil-carrier, and operative connections between said paper stop and stripper and said stencil-carrier, substantially as set forth.

12. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising a pivotally-mounted bar and arms carried thereby in operative relation to said stencil-carrier, and means for moving said bar and arms into paper-stopping and paper-stripping positions, substantially as set forth.

13. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising a pivotally-mounted bar and arms carried thereby in operative relation to said stencil-carrier, and means for automatically moving said bar and arms into paper-stopping and paperstripping positions, substantially as set forth.

14. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising a pivotally-mounted bar and arms carried thereby in operative relation to said stencil-carrier, and a cam carried by said stencil-carrier and coacting with said bar and arms, substantially as set forth.

15. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a combined paper stop and stripper comprising a pivotally-mounted bar and arms carried thereby in operative relation to said stencil-carrier, and a cam carried by said stencil-carrier and coacting with said bar and arms through the medium of a rocking lever, substantially as set forth.

16. In a stencil-printing machine, the combination with a stencil and means for operating the same, of a pressure-roller and a combined paper stop and stripper in operative relation to said stencil and said roller, substantially as set forth.

17. In a stencil-printing machine, the combination with a stencil and means for operating the same, of a pressure-roller mounted in movable arms having curved ends, a shaft, and cams mounted on said shaft adjacent 'to said arms and coacting therewith to move said roller into and out of operative relation to said stencil, substantially as set forth.

18. In a stencil-printing machine, the combination with a stencil-carrier and means for supporting and moving the same, of a recording device, a pressure-roller mounted upon cil-carrier, and a connection between said roller hinged arms, and a connection betweenw said arms and said recording device, whereby both may be simultaneously moved to operative or inoperative position, substantially as set forth.

20. In a stencil-printing machine, the combination with a rotary stencilcarrier and a pressure-roller; of means for supporting and operating the same to produce prints from a stencil on said carrier, and stationary paperguides rearward of said stencilcarrier and pressure-roller but in juxtaposition thereto and adapted to receive sheets from said carrier and roller and to curve the same between their edges in their passage from the machine,

substantially as set forth '21. Ina stencil-printing machine, the combination with a stencil, means for supporting and moving the same and a pressure-roller coacting with such supporting means, of apaperstripper having an arm or arms movable to operative and inoperative positions and terminating in juxtaposition to said pressure-roller and supporting means, the ends of said arm or arms being provided with star-wheels, substantially as set forth.

This specification signed and witnessed this 26th day of June, 1903.

ALBERT B. DICK. Witnesses:

W. G. ARNOLD,

R. R. HARRrNs'roN.

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