US19758A - davis - Google Patents

Description

UNITED sTATEs PATENT oEEioE.

G. W. DAVIS, OF SENECA FALLS, NEW YORK.

PRINTING-PRESS.

Specification of Letters Patent No. 19,758, dated March 30, 1858.

To all 'whom it may concern:

Be it known that I, G. WV. DAvrs, of Seneca Falls, in the county of Seneca and State of New York, have invented a new and Improved Printing-Press; and I do hereby declare vthat the following is a full, clear, and exact description of the same, reference be ing had to the annexed drawings, making a part of this specification, in which- Figure l, is a vertical section of my improvement taken in the line (w) (m) Fig. 2. Fig. 2 is a plan or top view of ditto.

Similar letters of reference indicate corresponding parts in the two figures.

My invention consists in the employment or use of a swinging platen adjustable spring frisket inking device and a reciproeating bed, arranged as hereinafter shown wherebythe several parts are, by the most simple means, operated conjointly by the movement of a single lever.

The invention is chieiiy designed for small or what is generally known as hand presses.

To enable those skilled in the art to fully understand and construct my invention I will proceed to describe it.

A represents a frame which may be constructed in any proper manner to support the'working parts and B, B, represents two horizontal and parallel ways or guides which are attached to the frame and on which a bed C, is placed. This bed is allowed to move freely back and forth on the ways B, B, and it contains the form D which is secured thereon in any proper way. The ways B, B, extend outward some 'distance beyond one side of the frame A,

equal to the length of the platen E, the inner edge of which is hinged or connected by joints or hinges (a) to the frame A. These joints or hinges are connected to adjustable blocks fitted in slots in the frame and so arranged that the hinges or joints and consequently the inner end of the platen may be raised or lowered to the desired height.

To the upper surface of the platen E a semi-circular bar -F is pivoted, and the upper end of this bar is pivoted to the end of a lever Gr, which is attached to or secured on a shaft I-I, the ournals of which have their bearings in the upper ends of supports I, I, at

'the sides of the frame A. To the lever G a branch or arm J is connected. This arm is of curved form and has a pin (c) passing transversely through its end on which the outer end of a rod K catches, said rod being provided with a hook (el) for the purpose. The opposite or vouter end of the rod K is notched so as to form-a hook (e) which passes through a recess (f) in-a flanch (g) at the inner end of the bed C and catches over the lower end of said recess as shown clearly in Fig. l. A projection (It) is attached to a plate between the outer ends of the ways B, B, as shown in Fig. 1.

K, is a frisket which is formed of thin metal plates or strips (ax). The inner end of this frisket is attached to traverse bar (j) the ends of which are connected to vertical rods (l) (Z) which are fitted in eyes (m) (m) which are attached to the frame A, said vrods having spiral springs (n) on them.

tain degree of elasticity independent-ly .of Y g l the springs Y L, L, L, represent three ink rollers which are placed in the frame A just .above the bed C. The two rollers are placed side by side, the upper one being over and between the two lower ones. (See Fig. l.) These rollers are operated by means of belts (t) (u) from the shaft H, the belt (t) passing around a pulley (fv) on said shaft and also around a pulley (w) attached to the frame, the pulley being attached to a pulley around .which the belt (a) passes said belt also passing around a pulley at one end of the upper roller L which gives motion to the two lower ones.

From the above description of parts it will be seen that by raising and lowering the outer end of the lever Gr, the platen E will be swung or moved up or down, and a reciprocating motion also given the bed C. The form D is inked as it passes under the lower rollers L, L, and the blank sheets are laid upon the frisket K', which, when the plate descends or is depressed yields or gives to its pressure in consequence of its own elasticity in connection with its spring bearings (fr) so that the sheet will be pressed down upon the form D by the platen and receive the impression. The necessary dwell is given the bed C, and consequently the form D, while the impression is being given the sheet in consequence of the projection (72,), which throws up the hook (e) and disconnects it from the bed C. By this means the rod K continues to move forward underneath the bed C and without moving it until the impression is given the sheet, the hook (e) catching over the lower edge of recess (f) and drawing the bed back underneath the rollers as the lever Gr, is raised, the printed sheet being removed by hand from the Jfrisket in the meanwhile, and a blank sheet placed thereon ready for the succeeding downward movement of the G. W. DAVIS.

Vitnesses:

N. BAKER, GEO. M. COLEMAN.

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