US797536A - Printing-press. - Google Patents

Description

PATENTED AUG. l5, 1905.

W. SCOTT. PRINTING PRESS.

APPLICATION FILED Mmm, 1901.

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PATENTED AUG. L5, 1905.

W. SCOTT.,

PRINTING PRESS.

APPLICATION FILED Amm, 1901.

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Specification of Letters Patent,

Patented Aug. 15, 1905.

Original application filed June l5, 1898, Serial No. 683,519. Divided and this application filed April Z7, 1901. Serial No. 57,739.

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Be it known that l', VVAL'rnR SCOTT, a citi- Zen of the United States, and a resident of Plainfield, in the county of Union and State of New Jersey, have invented a certain new and useful Improvement in Printing-Presses, of which the following is a specification.

The present application is a division of my prior application for Letters Patent of' the United States, filed June 15, 1898, Serial No. 683,519, and has for its principal object the better distribution of ink in printing-presses.

The invention consists in features of construction, parts, and combinations of devices hereinafter described, and more particularly pointed out in the appended claim.

The preferred form of the invention is illustrated in the accompanying drawings, forming part of this specification, in which- Figure 1 is a central vertical longitudinal sectional view of a machine in which the invention is embodied, parts being' omitted, and .showing` mechanism for reciprocating the type-bed and also mechanism independent of the bed for driving the inking-rollers. Fig. 2 is a side view of the last-mentioned mechanism on a scale larger than that employed in Fig. 1. Fig. 3 is a detail of the last-mentioned mechanism. Fig. f1 is a plan of the mechanism shown in Fig. 1. Fig. isa crosssection of rolling gears and racks for driving the bed and also shows other parts.

Like reference characters will be used to designate the same part in the drawings.

Part only of the framework A of the machine is shown in the drawings.

B designates a type-bed of any usual or convenient form or construction, and 1 suitable ways or guides (two only being shown) upon which the bed B moves to and fro.

2 designates rack bars connected to or vformed integrally with the bed Bat the under side thereof, said rack-bars extending longitudinally of' the bed.

3 is an ink table or plate at one end of the bed B, and 4L is a form on the bed B.

The bed B is moved to and fro by the rolling gears 5, which mesh with racks 2 on the bed and with racks 6, which are fixed to the stationary frame A. The gears are mounted upon a shaft 7, which is carried by a head 8. By preference the gears 5 are fast to the shaft, and the shaft is journaled in the head. r1`he shaft 7 is parallel with the plane of the bed B, and the head 8 has a shaft 9 secured in a vertical bearing therein.

also has a slot extending all the way across it and beyond the shaft 9, and a connecting-rod 10 passes into said slot and has an eye 11 at the end thereof, by means of which it engages with the shaft 9. The rod 10, at its other end, is provided with a boX 12 for connecting it with an upright stud 13, which is journaled, preferably, in a bearing 14 on a planet-gear 15. The gear 15 is journaled on a stud 16, which is suitably secured in a bearingformed with or borne by a carrier-gear 17, shown as a bevelgear. upon an upright stud 18, which is secured to the bottom of the casing 19, which in turn is secured to the framework A. The casing 19 is circular in plan, and its walls are fiared outwardly at 20 to provide a raceway or track upon which the teeth of the gear 17 may run and by which they maybe supported in part. The casing 19 is offset at the level of the gear or slightly thereabove and again rises above said offset portion, as shown. An internal gear 21 rests upon this offset portion and is made fast to the easing in any suitable manner. Slightly above the top of the gear 21 is the top of an external flange on the casing 19, and an externally-flanged bearing-ring 22 is jogged down over the said external flange of the casing 19 and is made fast thereto. The gear 15 has an internally-flanged ring 23 secured to its top, the external diameter of the ring 23 being equal to the diameter of the pitch-circle of the gear 15, while the internal diameter of the ring 2Q is equal to the diameter of the pitch-circle of the gear 21.

24 designates bearing disks or wheels journaled on studs on the gear 17 and coacting with each other and with. .the rings 22 and 23.

The bevel-gear 17 is driven at opposite sides by bevel-gears 25, fast on shafts 26, which are geared together by pinions 27 and shaft 28 and an intermediate pinion Q9 on a short shaft. The casing 19 is cut away or recessed in order to allow the gears and their shafts free passage and room for motion.

The points of the teeth of the gears 5 are prevented from running on the bottoms of the kerfs of the racks 6 by means of disks or wheels 31, which are secured upon the hubs of said gears and turn therewith, and by the tracks or ways 32, which are parallel with and alongside of the racks 6, the diameters of the disks 31 being equal to that of the pitchcircles of the gears 5, preferably. The said tracks 3Q may be integral with or may be attached to the frame A.

The mitergear 17 turns The form 4 on the bedB may be lithographie, let-ter-press, or other and is inked by means of rollers I, with which the endwisemovable or vibratory rolls F coact. The rolls I receive ink from the table 3, which in turn receives ink from distributing-rolls D. Endwise-movable or vibratory rolls G coact with the 4rolls D in the spreading of the ink evenly. Ink may be supplied to the table and the rolls F G may be moved to vand fro endwise in any suitable or known manner. (Not shown.) The ink may be conveyed in any known manner from a fountain (not shown) to the table 3, and the rolls D cause its distribution thereon as usual. During the forward or printing strokes of the bed B the table 3 passes under and in contact with both sets of rolls I, the cylinder being lifted after the impression is taken and before the table 3 reaches it by any suitable means, as in said prior application or as in my Letters Patent of the United States, dated April 15, 1890, and numbered 425,710. The rollsI take ink from the table 3 and lay it on the form on the bed as the bed moves in each direction, each rolier I coaeting with all parts of the form. By arranging rolls I behind the impression-cylinder Cwthat is, at its left in Fig. 1#more rolls can be used to coact with all parts of the form than can be placed in front of the said cylinder, whereby a more uniform and better inking of the form is secured. In case water-rolls replace thel rolls I behind the cylinder C contact between said waterrolls and the ink-table may be prevented in the manner illustrated in my Letters Patent of the United States, No. 505,961, and bearing date the 3d day of October, 1393.

The rolls F G are oscillated independently of the bed B, preferably by the following means: A channeled guide-bar 33 is fixed to the frame A adjacent to and parallel with the path of the gears 5. A rack-bar 34 lies in the guide 33 and is moved to and fro endwise by means of a connection with the beddriving mechanism, as an arm 35, provided with an eye 36, fitting over the hub of an adjacent gear 5, whereby the rack 34 moves to and fro in unison with the back-and-forth motion of the bed-driving gears 5. The motion of the rack-bar 34 is transmitted to and oscillates the rolls F G, and these rolls F G in turn drive the rolls I and D correspondingly. The means whereby said rack-bar 34 so drives the rolls D I F G (shown in the drawings) comprises a shaft 37, which is journaled in the frame A and extends near to and over the rack-bar 34, where it is provided with a pinion 38, which meshes with the rack 34, the bar or guide 33 being recessed for the purpose of allowing said pinion to mesh with the bar 34. A gear 39 at the other end of the shaft 37 is geared with the rolls F by gears 40 and with the rolls G by gears 41, some of which are journaled on the frame A and the .remainder of which are fast on the shafts of the rolls F G. The gears 41, which are fast on the roll-shafts, are splined thereto or are otherwise so arranged as that said rolls F G may be moved to and fro endwise without ever becoming disconnected from the shaft 37.

rIhe ink is spread upon the table 3 by the rollsD and is transferred by the table or plate to the rollers I in front of and behind the impression-cylinder C, and these rollers I transfer the ink to the form on the bed B. The rolls I and D are driven by the rolls F G (by frictional contact) independently of the bed and form, and, in so far as these rolls D F G I are concerned` the rack-bar 34 is the prime mover. In this manner the bed B is relieved of the duty of rotating the said rolls, and these rolls are oscillated in unison with the reciprocations of the bed or are reversed in their motion of rotation as the bed reverses its direction of motion.

I do not limit myself to the precise form of my invention shown in the drawings and above described, `since the invention may be embodied in other forms without departing from the spirit thereof.

IVhat I claim as new, and desire to secure by Letters Patent of the United States, is-

In a flat-bed printing-press, the lcombination with an impression-cylinder, of a reciprocating bed, an ink-table at the front end thereof, means in front of said cylinder for distributing ink on said table, and ink-rolls in front of and behind said cylinder for coacting with the form and said table supplying ink to all said rolls.

Signed at New York city, in the county of New York and State of New York, this 25th day of April, A. D. 1901.

`WALTER SCOTT. `Witnesses:

EDWARD YV. NoRRIs, R. IV. BARKLEY.

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