US642571A - Printing-press. - Google Patents

Description

No. 642,57I. 'Patented Feb. 6, |900.

H. F. BECHMAN.

PRINTING'PRESS.

(Application Atiled. Oct. 2, 1896,) (N0 Mildl.)-` 3 Sheets-Sheet TH: Nonms vsn-.ws co. Fumo-uwe.. wAsuwaYcN, u. c.

Patented Feb. 6, |900.

H. F. BECHMAN.

PRINTING PRESS.

(Application filed Oct. 2, 1896.)

3 Sheets-Sheet 2.

(No Model.)

Een? ec/maz -By mi No. 642,571. Patented Feb. 6, |900. H. F. EcHMAN.

PRINTING PRESS.

(Application med oct. 2, 1896.)

3 Sheets-Sheet 3.

:nu: nonms PETERS co. Pnoruwmwuummou. u. c,

FFICE.

PATENT IIENEY E. BEoI-IMAN, on BATTLE CREEK, MICHIGAN, AssIeNoR To THE DUPLEX PRINTING PRESS COMPANY, on SAME PLACE.

PRINTlNG-PRESS.

SPECIFICATION forming part of Letters Patent No. 642,571, dated February 6, 1900.

Application led October 2,1896.

T all whom it may concern,.-

Be it known that I, HENRY F.BECHMAN, of Battle Creek, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Printing- Presses; and I hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this speciiication.

This invention relates to web-printing mai chinery, and is an improvement upon the machine shown in Letters Patent No. 478,503, granted to J. L. Cox July 5, 1892, and also upon the press shown in my application, Serial No. 594,714, led June 8, 1896.

The particular object of this invention as applied to the said Cox press is to enable additional form-inking rollers to be employed without lengthening the press or stroke of cylinders, thereby obtaining a finer distribution of ink and enabling the press to do hetter class of work, or to enable the stroke of cylinders to be shortened while using a less number of form-rollers.

The particular object of the invention as applied to my aforesaid press is to avoid' the necessity for lateral movements of the webguide rollers at the front and rear ends of the press by so moving the guide-rollers on the cylinder-carriage as to compensate the web for the movements of the beds.

The invention therefore consists in the novel construction and combination of parts as claimed, and the best form of machine embodying my invention now known to me is sufficiently illustrated in the accompanying drawings and hereinafter described to impart a clear understanding thereof to those familiar with this class of web-printing machines.

In the drawings, Figure 1 is a longitudinal vertical sectional diagram of a printing-press embodying my improvements and illustrating the cooperative parts sufficiently to enable the present invention to be understood. Fig. 2 is a detail. plan view of one set of devices embodying my invention. Fig. 3 is a vertical sectional view on line 3 3, Fig. 2. Fig. 4 is a detail section through one bed and cylinder, showing in dotted line the relative po- Serial No. 607,667. (No model.)

sition of the bed and cylinder and cylinder web-guide rollers at the extreme limits of their movements.

The type-beds h h are'arranged paralle one above the other, as in Goxs patent, N o. 478,503, but are not stationary, as they are moved back and forth contrary to the movement of the cylinders, as described in my application above mentioned. The cylinders H H' are journaled in a cylinder-carriage and reciprocated back and forth over beds h h', as described in said Cox patent. On the opposite sides of each cylinder are web-guide rollers f and f', respectively corresponding in functionand location to the web-guide rollers ff of said Cox patent, but having an additional important function in the present invention, as hereinafter explained. The web is fed in continuously by suitable feeding mechanism K and fed out continuously by suitable delivery mechanism O and is carried from the feed overa looping-roller Z, down under a stationary web-guide roller M', back over guide-roller f, down under cylinder H, up over guide-roller f', back to and under a stationary roller m', up over a register-adjusting roller m, forward to and over roller f', beside cylinder II', down under said cylinder, up over roller f, forward to and overa stationary guide-roller M, down under looping-roller Z', and up to the delivery. vThese parts, with the exception of the new function of rollers f and f have substantially the same construction, arrangement, and mode of operation of correspondingly-lettered parts in the Cox patent, No. 478,503, referred to, and further detailed description thereof in this case appears unnecessary. l

On the shafts of cylinders H H are fixed gears D and d, the latter slightly larger in diameter than the former. Gear D meshes with a rack D', fixed on the frame, and gears d mesh with racks d', fixed on the bed. Consequently when the cylinder is reciprocated in one direction the bed is moved in the oppositeV direction. Practically I find that if the gearing is so proportioned as to move the beds about one-seventh the distance that the cylinders travel a very beneficial result is obtained. This relative proportion of travel can, however, be varied. This system of gearwith as follows: On the end of each cylindershaft is keyed a small pinion p, meshing with a segment or gear P, fixed on a rock-shaft P', journaled in a suitable bearing on or in the cylinder-carriage C above each cylinder. On each shaft P' are pinions Q, which mesh in horizontal sliding racks Q', guided in suitable ways in the inner faces of carriage C. To each rack Q' are pivoted opposite links R R, which have pins R' on their outer ends provided with friction-rollers running in curved raceways S, formed in or attached to the car riages C, as shown. The arms R also have inwardly-projecting studs or journals r on their ends, upon which are journaled the guide-rollers for f', as shown. By referring to Figs. 2 and 3 it will be seen that the construction is such that when the cylinders are reciprocated shafts P' will be rocked and racks Q' reci procated back and forth and that as racks Q' slide the arms R are vibrated or oscillated in opposite directions by reason of the controlling action of the guiding-raceways S. Consequently the web-guide rollers on op posite sides of the cylinders will be oscillated in opposite directions in such manner that they will keep the web in exact pace with the periphery of the cylinder while printing, and the movements of the guide-rollers produced by the rack and arms are such that the web is fed under the cylinder exactly as is required to compensate for the movement of the bed. The web-guides beside each cylinder having such movements, the web is compensated equally, but independently, for each bed.

The operation of the machine is briefly as follows: The web is continuously -fed in and out of the machine; but that part of the web extending from one looping-roller Z to the other, l', is intermittently stopped by the iisingand-falling action of said rollers ZZ', as described in the COX patent. While thus stopped, the cylinders are moved forward or back over the beds and press the web onto the type. Now as the beds move contrary to the cylinder in the present invention the part of the'web being printed has'to travel uniformly with the bed to prevent rupture thereof. For instance, say the beds move five inches to the right while the cylinders travel to the left, live inches of web will have to be fed under each cylinder in accordance with the travel of the bed. This movement of the web is automatically accomplished by the oscillatory or vibratory movement of the guide-rollers f f', the lefthand guide-roller dropping, so as to allow five inches of web to go under the cylinder, and the right-hand guide-roller rising, so as to take up the ve inches thus supplied, this action of the guiderollers being so predetermined and calculated that the tension of web remains substantially uniform, the web is compensated for the movement of the bed in either direction during the time of printing, and yetneither rollers M, M', m, or 'nz' are moved, nor is the web during printing slipped or slacked around such guides. The fact is that the web is not slipped on the surface of the cylinder the supposed five inches; but as the cylinder while on impression has five inches more of rotation than it would have were the bed stationary this five inches must be supplied without moving the entire portion of the web in the press. This is accomplished by the alternate reciprocations of the rollers fand f After each impression is completed the web is shifted forward through the press by the descent of rollers Z Z', as described in Coxs patent aforesaid, the invention, in brief, consisting in moving the beds in the Cox press contrary to the cylinders and moving the traveling guiderollers beside the cylinders in said press independently of their travel with the cylinders, so as to compensate for the movement of the beds without necessarily altering the function or mode of operation of any other parts of said Cox press. y

While I have described the invention as applied to a press employing a reciprocating cylinder and areciprocating bed, it is obvious that it is not limited to use in such connection. Itis useful where the cylinderis merely oscillatory and only the bed reciprocates, and it may be useful in other forms of presses, so that I wish to protect it wherever used.

Having thus described my invention, what I therefore claim as new, and desire to secure by Letters Patent thereon, isAd l. The combination of a movable type-bed, an oppositely-movable cylinder, web-guides at each side of and moving with the cylinder; web-guides on the frame of the press, and means for feeding a web through the press after each impression; with means substan tially as described whereby the web-guides beside the cylinder are shifted, during their travel with the cylinder, so as to wholly compensate the web for the movement of the bed, substantially as and for the purpose described.

2. The combination of a reciprocating bed, an oppositely-reciproeating cylinder, stationary web-guides on the frame of the press beyond the range of travel of the cylinder, and means for intermittently shifting the web forward between the bed and cylinder; with web-guides beside and traveling with the cyl inder, and mechanism substantially as described, for shifting said traveling web-guides during their travel so as to compensate for the movements of the beds, substantially as and for the purpose described.

3. The combination of a bed and cylinder,

IOO

IIO

and a pair of web-guide rollers on opposite sides of the cylinder; vibratory arms supporting said guide-rollers, and a sliding rackbar to which said arms are pivoted; withgearing, substantially as described, for operating the sliding rack-bar from the cylinder-shaft, for the purpose and substantially as described.

4. The combination of the sliding rack Q', the arms R pivoted thereto, the raceways S for guiding the outer ends of said arms; and the web-guides f, f', journaled on said arms and vibrated thereby; with the pinion Q meshing with the rack, and means for oscillating said pinion, for the purpose and substantially as described.

5. The combination of a reciprocating bed, an oppositely-reciprocating cylinder, stationary web-guides for conductinga web between the bed and cylinder, means for continuously feeding a Web to the press and delivering it therefrom, and a pair of looping-rollers substantially as described, adapted to intermittently arrest the movement of that part of the web in the printing mechanism; with a pair of Web-guides traveling with the cylinder, and means whereby they are shifted so as to compensate the web for the movement of the bed during the printing, all substantially as and for the purpose specified,

6. The combination of a pair of reciprocating beds; an impression-cylinder coacting with each bed and means for reciprocating the cylinders oppositely to the beds; stationary web-guide rollers for leading a web irst between one bed and cylinder, reversing it, and then leading it between the other bed and cylinder, and means for intermittently drawing the web for-ward through the printall substantially as and for the purpose described.

7. The combination of a reciprocating bed,

and oppositely-reciprocating cylinder, with a pair of web-guides beside and moving with the cylinder; vibratory arms supporting said guides, a rack-bar for shifting said arms, and means for reciprocating'said rack-bar as it travels with the cylinder, for the purpose and substantially as described.

8. The combination of a reciprocating bed and oppositely-reciproeating cylinder, a rockshaft and gearing substantially, as described, whereby said shaft is rocked by the movement of the cylinder; with a sliding rack-bar on the cylinder-carriage operated from said rock-shaft, a pair of arms pivoted to said rack, and having -their outer ends guided in ways attached to the cylinder-carriage; and a pair of web-guide rollers mounted on said arms whereby as the cylinder is reciprocated the guides are reciprocated with it and simultaneously vibrated in opposite directions, for the purpose and substantially as described.

In testimony that I claim the foregoing as my own I affix my signaturein presence of two witnesses.

HENRY F. BEOHMAN. Witnesses:

E. D. AUsrIN, F. W. DUNNING.

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