US237067A - Printing-press - Google Patents

Description

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J. TILL.

i Printing Press. No. 237,067. Patented Jan. 25, |881.

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VENTOR ATTORNEYS@ MFETERS, PHOTO-LITHOGRAPNER. WAH|NGYOM D, C;

(Model.) f '3 sheets-sheet s J. TILL.

Printing Press. N0. 237,067. Patentd Jan. 25,1881.

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NPEIERS. FHOTO-HTHQGRAPHER. WASHINGTON, D c.

UNITED STATES PATENT OFFICE.

JOHN TILL, OF CANTON, PENNSYLVANIA.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 237,067, dated January 25, 1881.

Application led August 30, 1880. (Model.)

To all whom it may concern:

Be it known that I, JOHN TILL, of Canton, in the county of Bradford and State of Pennsylvania, have invented a. new and Improved Prin ting-Press,of which thefollowin gis aspecication.

The object of this invention is to construct a cheap and simple printing-press, designed especially with a view to easy, rapid, and accurate work.

The invention consists of a four-sided rotary frisket-frame that revolves one-quarter of its circumference for each im pression that is made by and between the rocking-bed and platen; and it consists, further, of certain other novel points inthe construction and arrangement of parts, all of which are herein fully described.

Figure 1 is a plan view of the device. Fig. 2 is a side elevation ofthe same with bed and platen fully apart. Fig. 3 is a sectional side elevation of the same on line wx, Fig. 1, showing the position of the parts when an impression is being made. Fig. 4 is a sectional elevation on line y y, Fig. 2. Fig. 5 is a detail elevationintended to show the platen supported by one arm.

Similar letters of reference indicate corresponding parts.

In the accompanying drawings, Arepresents a suitable frame. B is the bed, rocking on a shaft at b, so as to come" in parallelism with the movable platen C when an impression is about to he given. The platen C is supported by a single upright arm,-which rocks on the pivots c c, and is forced forward bythe cam D, that is fixed on the shaft E, and said platen C is retracted by the spring F, whose other end is made fast to a transverse rod, d, of the frame A, as shown. By Fig. 5 of the drawings it will be seen that the platen C is supported by au arm only on one side, to allowr for the movement of the frisket-frame without obstruction.

On the projecting end o f the shaft Eis keyed the cog-wheel E', that gears into the driving cog-wheel G, that is secured on a stud, G', on a side of the frame A, and said wheel E is provided with an eccentric wrist-pin, f. Ou the opposite end of shaft E is keyed a disk or wheel, H, provided with an eccentric or wristpin, g. From these wrist-pins fg the connecting-rods I I ex'tendto the lateral lugs h ofthe bed B, so that at each revolution of the main shaft E platen C and bed B are moved toward each other to make one impression upon the sheet that may be on the frisket that is between them and it will be seen that when the bed B and platen O are most closely approached to each other the said platen() is immovably held in that position Aby the cam D for a sufcient length of time to insure a good impression.

K represents the frisket-frame, consist-ing of the end plate, K2, that revolves in a vertical plane, and ofthe friskets K', that are removably secured at one end to the plate K2 by the nuts l or other" suitable device.

Secured `on the outer face of the end plate, K2, is a plate, L, having four eqnidistant peripheral notches, m, for the reception of the corresponding end of the spring-bolt L, that moves vertically. in lugs m' n that are secured to the frame A, the function of said spring-bolt Ll being to hold the .frisket-frame K in position when an impression is being made.

On the outer face of the plate L a ratchet, M, is secured, containing fourteeth, as shown; and secured loosely on the shaft E, and. in face contact with the ratchet M, is an outer circular plate, N, at the periphery of which is a stud, n', carryinga pawl, n, which latter is designed to engage with teeth of the ratchet M.

Connecting the bed B with the plate N, and thereby giving motion thereto, is a connectingrod, O, having one end slotted, as shown at o, so as to slide on the studp on thesad plateN.

Were the frisket-frame K to move synchronously with the bed B, the angles of the said frame K would be caught between the bed B and platen C before the two latter were sufliciently apart; hence the sloto is formed in the rod O to permit the frisket-frame K to rest until the bed B has been far enough removed from the platen C to allow the frame K to move without interference between said bed and platen B C.

The frisket-arms P are secured, by set-screws or other suitable device, on the rods P', that extend at right angles through the end plate, K2; and on the outer ends of these rods P are spiral springs P2, whose function is to cause the said arms P to hold the sheets to be printed upon the said friskets K' 5 and upon the outer end of each rod P is secured, by set-screw or otherwise, a cam, Q, whose functions are hereinafter described.

Q' represents studs designed for the contact ofthe cams Qdurin g the operation ofthe press.

R represents the feeding-table, and S the inclined delivery-slide.

Each frisket K' has a covering, k, of silk, muslin, or other suitable fabric, to support the sheets that are to be printed.

The parts being in the position shown in Fig. 3 and the press being in operation, a sheet is fed from the table R upon the upper frisket, K', and as the frisket-frame K revolves the cam Q, that holds the upper frisket, K', open by its contact with the upper stud, Q', breaks contact with said stud Q' and permits a spring, P2, to close the corresponding frisket-arm P down upon the said sheet and hold it there until said frisket-frame K has made threequarters of a revolution, when the said cam Q comes in contact with the rearmost and lower stud, Q', and thereby the said frisket-arms P are raised, as shown, to permit the escape of the printed sheet from the said frisket K', and thus the work progresses, four sheets being printed at each revolution of the frisketframe K. On each closing motion of the bed B the connecting-rod O causes the plate N to rotate backward for a quarter of a revolution, so as to disen gage the pawl n from the ratchet M and give it a hohl in the next tooth, and by this means the friskets K' are successively brought between the bed and platen B C.

When for any purpose it is desired to get at the platen, one of the friskets K' may be removed, and thc pawl n may be, it' desired, thrown rearward ont of gear, so that said frlsket-frame K will not rotate, in which case the press may be used as an ordinary press without rotating friskets.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. An improved printing-press constructed substantially as herein shown and described, containing the following elements: frame, vertical rockin g bed, cam and spring actuated vertical platen, rotary frisket-frame, and ratchetand-pawl device for rotating the friskets, combined by mechanism, as set forth.

2. In a prin ting-press, the combination, with the movable bed B, revolving frisketframe K, plates L N, ratchet and pawl M u, and stud p. of the slotted connecting-rod 0, substantially as herein shown and described, whereby the said frisketframe is permitted to rest until the said bed is far enough removed from the platen to allow the said frisket-frame `to move without interference between said bed and platen, as set forth.

JOHN TILL.

Witnesses:

I. l. SToRER, C. SEDGWICK.

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