US643999A - Printing-press. - Google Patents

Description

No. 643,999. Patented Feb. 2o, |990. H. F. lacHwIAu.l

PRINTING PRESS;

(Application filed June S, 189B.) (N0 Model.) 3 Sheets-Sheet 2.

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No. 643,999. Patented Feb. 2o, |900. H. F. BECHMAN.

PRINTING PRESS.

Application filed June 8, 1896.) (No lqdel.) 3 Sheets-*Sheet 3.

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IINrTED STATES PATENT EEICE.

IIENRY F. BECI-IMAN, OF BATTLE CREEK, MICHIGAN, ASSIGNOR TO THE DUPLEX PRINTING PRESS COMPANY, OF SAME PLACE.

PRINTlNG-PRESS.

SPECIFICATION forming part of Letters Patent No. 643,999, dated February 20, 1906. Application tiled Tulle 81 1896. Serial No. 594,714. (No model.)

ings, and to the letters of reference marked thereon, which form part of this specification.

This invention is an improvement in movable bed and cylinder web-printing presses. The object of this invention is to shorten the travel or strokeof the cylinder in that class of Hat-bed printing-presses in which 1ocomotive or reciprocating cylinders are employed, and thus reduce the necessary length of the machine and increase itsspeed, or,

retaining same length of stroke, it admits the use of addition al form-rollers,which improves the quality of the work, and also gives more time between impressions in which to shift the web,thus materially contributing to speed.

The invention is particularly useful as applied to flat-bed presses such as is described in the patent to Cox, No. 478,503, dated July 5, 1892. In that class of presses the reciprocation of the bed during impression, while the impression-cylinder is coacting with the forms, in itself, materially reduces the stroke of the machine and correspondingly increases its speed. Nevertheless, as this movement of the bed necessitates a corresponding movement of the web, which does not take place when the beds are stationary, the difficulties involved in providing` for this movement of the web with movable beds are so great that practically no advantage is gained. My invention hereinafter described obviates entirely these difticulties, inasmuch as by my proper movement of the web in constructions heretofore known. In short in my invention I bodily move the beds and the web-guide rollers at each end of the bedsjust as if the beds and web-guiding mechanism in the aforesaid Cox patent from one looping-roller back to the other were pulled back and forth while the cylinders travel-that is, the entire system of guide-rollers whereby the web is presented to the beds and reversed are immovable in relation to the beds, but travel therewith in my press, just as they are stationary in relation to the beds in said Cox patent. This will be more fully explained hereinafter.

An additional object of the invention is to cause the reciprocating cylinder to move the bed in the opposite direction by the peculiar system of gears and racks hereinafter described.

The invention therefore consists in the combinations and constructions of mechanisms and parts thereof summarized in claims, and the best form of press now known to me is illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal vertical section of the press with the inking mechanism removed. Fig. 2 is a transverse vertical section on line 2 2, Fig. 1. Fig. 3 is a transverse vertical section on line 3 3, Fig. l. Fig. Llis a detail front end elevation of press. Fig. 5 is a detail of the gearing between the cylinder and bed and frame.

The movable type-beds A A' are arranged parallel, one over the other, and suitably supported on guides a a', attached to the main frames Y. Coacting with said beds are cylinders B B, journaled in cross-heads C, supported and guided on the frames Y, said cross-heads being connected by pitmen C to crank-pins d on large crank gear-wheels D on the main shaft D at the rear end of the machine, which is driven by a pinion e on the power-shaft E, as in the Cox presses. On shafts b of cylinders B B' are keyed pinions F F, which mesh with stationary racks ff', fastened to the side frames Y. On said shafts are also secured gears G G' of same diameter as the impression-cylinders and meshing with racks g g', attached to the type- IOO bedsv A A'. Therefore when the cylinders are moved in one direction the beds are moved in the opposite direction, or vice versa.

At each side of each impression-cylinder, above the type-bed and journaled in the cross-heads C, are web-guide rollers I-I h H 7L'.

Mounted upon horizontal extensions Y of the side frames, at the front end of the press, are reciprocating castings I, in which are journaled a lower web-guide roller i and an upper web-guide roller 'i'. The castings I are connected to the upper bed A' by rods I', so that they move synchronously with said bed.

J and j are parallel rock-shafts journaled in the side frames adjoining the rea-r ends of the beds, the lower rock-shaft J having depending arms J', in which isjournaledawebguide roller J2, and shaft j, having upstanding arms j', in which is journaled a webguide rollerj2' On the outer ends of shafts J and j are toothed segments J3 andj2, respectively, which intermesh, so that the shafts are rocked synchronously, so as to swing the guide-rollers simultaneously forward or backward. The shafts are rocked by rods J4, which connect arms J' to extensions A2 on the upper bed, as shown, the connection being such that rollers J2 and y2 will have a lateral movement equal to the endwise motion of the bed.

Beside but in rear of shaft J isaguide I, and in rear of shaft j is a guide 705, and just in rear of these guides are a pair of equalizing looping-rollers Z Z', journaled in vertically-movable bars L, having cam-rollers L' on their lower ends engaging a cam-race M' in disks M, attached to a shaft M2, driven by a gear M3 from one of the crank-wheels D, as shown.

In rear of the cqualizers is a pair of feedcylinders N N'and coacting tapes n, running over guide-rollersn', as shown, said feed-cylinders being intergeared and driven by a train of gears N2 N3 from main shaft D'.

Above the equalizcrs is a delivery-cylinder O and coacting tapes o, running over rollers o', as shown, the cylinder O being driven from shaft D' or the feed-cylinders by a train of gearing (not shown, but fully disclosed in said Coxs patents) and at substantially-uniform speed with the feed-cylinders.

The feeding-cylinders and delivery-rolls and the equalizing or looping rollers are constructed and operate in substantially the same manner as in the aforesaid CoXs patent.

The web lV is led in from a roll W' under a guide-roller w, up over cylinder N, down under cylinder N', up over lower looping-roller Z, down between guide 765 and shaft J, down under roller J2, thence over roller II, under cylinder B, up over roller h forward to and under roller yi, up to and over roller i', back to roller 7L', then under cylinder B', up over roller Il', back to roller j2, down between guide h5 and shaftj to and under upperlooping-roller Z', then up to the delivery O o, as shown. V

The shafts J and j may be provided with projections J 5 andy'5 to prevent the web sagging against the shaft and keep it close to guides K5 7c The operation is as follows: The crossheads C, moving back and forth, carrying the impression-cylinders B and B' with them, cause said cylinders to revolve by means of gears F and F', Figs. l and 2, and stationary racks f and f'. The peripheral speed of gears G G', &c., and also printing-surface of cylindersB and B', is consequently greater than peripheral speed of gears F and F'. This causes racks g g', with attached beds A A', to have a motion relative to main frames Y opposite in direction to that of cross-heads C. The speed of and distance traveled by beds A A' depends upon the ratio of diameters between gears G F and G' F'. Rollers Z Z' are given such a motion by cam M as to hold the web of paper being prin ted upon stationary during the printing operation relative to guides K5 765 and at the same time take up surplus paper being fed in by feed-cylinders N and N' and to give out surplus paper to the delivery O, j ust as they operate in the aforesaid Cox patent- Said rollers Z Z' also shift the web forward over the beds when the cylinders are at and near ends of travel, so that blank portions of paperare broughtinto proper position relative to the type for printing a ncwsheet, as described in the said Cox patent. Rolls J 2]'2 i t" are moved exactly with the moving beds A A', so as to bodily move that portion of the web of paper being printed upon with said beds A A', thus preventing any sagging or breaking of the web in whateverdirection the beds may be moving. As the cylinders move to the right the beds move to the left. Consequently rollersz' i' and J2j2 move to the left also; and when the cylinders move to the left the beds move to the right, and said rollers move with the beds to the right also. Obviously if the beds move during printing the web must move bodily with the beds or be ruptured. Moving said rollers with the beds avoids this. For instance, if the beds move to the left five inches rollers 13 t", moving live inches to the left with the beds, feed the web to the beds or allow the web to move back with the beds,preventinganystrain on the web,and rollers J2J2, moving to theleft, move back that part of the web to the left of the cylinders and beds and take up the slack in web which would be formed by the left movement of the beds if the rollers did not compensate therefor. On the movements of the beds to the right the swinging rollers J 2 t7'2 yield, so as to allow the web to be moved with the beds to the right and rollers 1I i" take up the slack that would be otherwise formed by such movement of the beds. Thus the rollers J2, t', 7l', andj2 are wholly independent, so far as their web-looping compensating functions are concerned, of the looping-rollers Z Z', which act simply as they do or would do if the beds Were stationary.

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

I. In a printing-press, the combination of a traveling impression-cylinder, an oppositelymovable type-bed, a rack on the bed and a rack fixed on the frame; with a pair of gearwheels of unequal Adiameter attached to the cylinder and respectivelyworkin g in the rack fixed to the frame, and in the rack on the bed of the press whereby as the cylinder is traveling in one direction the bed is moved in the opposite direction, substantially as and for the purpose set forth.

2. In a printing-press, the combination of a traveling cylinder, and oppositely-moving bed, and a pair QVfHUear-wheels of unequal db ameter attached to the traveling impressioncylinder, and means for reciprocating said cylinder with a stationary rack on the frame of the press; and a rack on the bed; the smaller of the two gear-wheels working in the rack fixed to the frame of the press, and the larger gear-wheel working in the rack fixed to the movable type-bed of the press, substantially as and for the purpose set forth.

3. In a printing-press, the combination of apair of movable type-beds, a rack on each bed; and a xed rack on the frame beside each bed; with a pair of locomotive impression-cylinders each having a pair of gearwheels of unequal diameter fixed thereon, the members-of`each pair of gears respectively working in a rack on the frame and in arack on the cooperating type-bed and means for simultaneously reciprocating said cylinders, substantially as and for the purpose set forth.

4. In a printing-press, the combination of a pair of locomotive impression-cylinders, a pair of movable type-beds, and web feeding and delivering mechanisms, witha pair of web-carrying rollers journaled in swinging arms or brackets provided with iutermeshing segments, one of said arms being directly connected to and reciprocated by the beds, substantially as and for the purpose set forth.

5. In a printing-press the combination of a movable type-bed, an oppositely-movable` to oscillate together, and operated directly from the beds substantially as described; with a web-carrying roller at the opposite end of the bed beyond the range of travel of the cylinder and movable by and with the bed; all substantially as described.

6. In a perfecting-press, the combination' of the beds and cylinders, the web feeding and delivery mechanism, substantially as described; and movable guide-rollers between the beds; with a swinging guide-roller between the feed and first bed, a similar swinging guide-roller betweenl the second bed and delivery said swinging rollers being mounted on rock-arms, intermeshing segments on said arms, and a pitman connection between one rock-arm and the beds, substantially as described.

7. In a printing-press, the combination of a pair of locomotive impression-cylinders, a pair of movable type-beds and web feeding and delivery mechanism, with a pair of webcarrying rollers attached to the beds and a pair of web carrying rollers journ aled in swinging arms or brackets, intermeshing segmental gears on said arms, and connections between said arms and the beds substantially as and for the purpose set forth.

8. The herein-described perfecting-press, consisting of the upper and lower beds, and means for moving them simultaneously in the same direction; the upper and lower cylinders and means for moving them simultaneously in the same direction but opposite to the beds; the pair of guide-rollers intermediate the cylinders attached to and moving with the beds; a continuous web-feed mechanism, a continuous web-delivery mechanism, a pair of connected looping-rollers for converting the continuous feed and delivery of the web into an intermittent movement over the beds; and a pair of swinging looping-rollers connected to and moved by the beds, between the beds and looping mechanism, all substantially as and for the purpose described.

In testimony that I claim the foregoing as my own I afiix my signature in presence of two witnesses.

HENRY F. BECHMAN.

Witnesses:

FRANK W. DUNNING, EDWARD D. AUSTIN.

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