US239232A - Printing-press - Google Patents

Description

(No Model.)

W. G. EVANS. Printing Press.

v No. 239,232. Patented March 22,118'81;

a. warms. Paotu muoemmlsn, WASHINGTON n c UNITED STATES PATENT OFFICE.

WILLIAM C. EVANS, OF PHILADELPHIA, PENNSYLVANIA.

PRINTING-PRESS.

SPECIFICATION forming part of Letters Patent No. 239,232, dated March 22, 1881. Application filed September 30, 1880. (No model.)

To all whom it may concern Be it known that I, WILLIAM G. EVANS, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented an Improvement in Printing-Presses, of which the following is a specification.

My invention relates to that class of printing-presses in which a bed pivoted to a frame is combined with a fixed inclined platen carried by the saidframe; and the object of my improvements, which are fully described hereinafter, is to provide a simple and economical press of this class.

In the accompanying drawings, Figures 1 and 2are perspective views of my improved printing-press, showing the operating parts in different positions; and Fig. 3, a vertical section of the press.

The inclined platen A of the press forms a part of, or is preferably cast in one piece with, the frame or stand B.

The bedD of the press has two projections, e 6 adapted to journals ff on the frame B, and forming part of, or attached to, the bed is the segmental inking-surface E. Wings h II also form part of the bed, extending from the edges of the inking-surface. Each of these win gs has a curved slot, 2', the end m of which is adapted to ajournal, n, projecting from the frame, the two journals constituting pivots on which the bed turns, under the circumstances explained hereinafter.

To projectionsp one on each side of the frame B, are hinged arms G G, jointed at their outer ends to the arms H H, which are connected together at their outer ends, and which constitute the operating-lever of the press, the fulerum s of this lever being projections from the bed, one on each side of the same.

The inking-roller frame consists, in the present instance, of wire bent to the form shown, and attached to the projections n n of the frame, the wire carrying the inking-roller J, and possessing such elasticity that the said roller will be pressed against the inking-surface of the bed and against the face of the type. While this simple form of inking apparatus may be applied to small and cheap machines, more elaborate appliances for Inking purposes will be adapted to larger and more costly machines.

In Fig. 2 the printing-form contained in front of the bed is being pressed against the paper on the platen by the depression of the operating-lever, the journals f f of the frame being the fulcrums, of which the bed is the lever, the said bed being operated by the combined action of the arms G and the operatinglever, the relation of which to the arms is such, when the bed is completing its forward movement, that the desired pressure of the printing-form against the paper will be accomplished with very little exertion. On raising the operating-lever the bed will be turned away from the platen of the machine, the journals ff continuing to serve as the pivots of the said bed until the ends at of the slots'i reach the journals a of the frame, when the projections e c of the bed will leave the journals ff, and the journals nn will become the pivots, on which the further turning of the bed is accomplished. During this further movement of the bed the printing -form carried thereby is brought into contact with the inking-roller, the necessary pressure being imparted to the latter by its spring-frame; and after the inking of the form has been completed the bed may be moved to its first position, Fig. 2, by the operating-lever, the bed, during this movement, changing its fulcrums, or, in other words, ceasing to be controlled by the journals n, and coming under the control of the journals ff.

The simplicity of the above-described printing-press and the economy of its construction will be readily understood by those skilled in the art without explanation.

I claim as my invention- 1. The combination, in a printing-press, of a suitable frame, its platen, and two pairs of fulcrum-journals, with a bed having bearings adapted to said journals, so that during the movement of the bed its fulcrum Will be changed, all substantially as set forth.

.2. The combination of the bed and its two bearings, adapted to two pairs of journals on the frame, the operating-lever, hinged to the bed, and the arms G, connected to the lever and to the frame, all substantially as set forth.

3. The combination of the bed and its wings h h, having slots terminating in the bearings m, and the bearings e c of the said bed, with the journals 1% andfof the frame, all substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

Witnesses: W. O. EVANS.

J AMIES F. ToBIN, HARRY SMITH.

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