US521464A - The natxnal lithografhwq compaf - Google Patents

Description

(No Model.) 2 Sheets-Shqet 1.

W. G. PUERTH. STENGIL PRINTING MACHINE.

No. 521,464. Patented June 19, 1894.

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W. G. PUERTH.

. STENCIL PRINTING MAUHINE.

No. 521,464. Patented June 19, 1894.

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\VILLIAM G. FUERTH, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE A. B.

DICK COMPANY, OF ILLINOIS.

STENCIL-PRINTING MACHINE.

5PECIFICATION forming part of Letters Patent No. 521,464, dated June 19, 1894.

Application filed January 3, 1893. Serial No. 457,630. (No model.) i

To all whom it may concern:

Be it known that I, WILLIAM G. FUERTH,

a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented a certain new and usefullmprovementin Stencil-Printing, of which the following is a specification.

In the accompanying drawings forming part of this specification, Figure 1 is an elevation of my improved machine with the parts in position to begin printing. Fig. 2 is a similar elevation with the parts in position ready to receive the impression sheet. Fig. 3 is a top plan view of the apparatus taken with the parts in the positionshown in Fig. 1. Fig.4 is an elevation of the printing roller. Fig. 5 is a transverse section through the stencil holding frame. Fig. 6 is a view of a detail hereinafter to be described.

In the accompanying drawings similar letters indicate corresponding parts.

A is the stationary base or bed-plate of the machine; on this baseA is a frame arranged to slide in the grooves a. This sliding frame comprises two main parts, the part B which acts as the printing bed and receives the impression sheet, and the part C which serves as the stencil frame for holding the stencil sheet, the latter being pivoted at a: to part B. Said part B may be moved by a pedal or other device and is shown as provided with a handle b, for the purpose of sliding said partbackward and forward, and a pin 1), for a purpose hereinafter to be described. The stencil holding frame is itself composed of two parts, an upper c and lower part c, the parts being shaped in cross-section as shown in Fig. 5, whereby a stencil sheet introduced between them will be held taut. The lower part c is provided with a series of pins which are engaged by pivoted latches o on the upper part c, which latches serve to bind the upper and lower parts together when the stencil sheet is in place. On each corner of the upper portion a of the frame 0 is provided an inclined way. Theinclined ways D at one end of the frame are somewhat differently .shaped from the inclined ways E at the other end, the latter being provided, as shown, with a hook shaped portion e and the former with stop screws d. The purposes of these inclines will be shortly explained. The inking portion of the machine is supported from the base plate A by two vertical posts F, on opposite sides. Upon each of these posts slides a box G, the box being connected for the purpose of securing rigidity and facility of removal by a cross-connecting piece II. These boxes act as bearings for the inking roller I. The ink supply rollerJ is adj ustably secured on said boxes by means of an angular bearing piece K, of the shape shown in perspective Fig. 6, which. piece K is provided with a hole is. in which the shaft of the ink supply roller is journaled. By means of a slot is and a clamp screw 10 the said angular piece K may be adjusted vertically so as to raise or lower the ink supply roller J whereby it may be re-inked or cleansed and easily removed from the ma-. chine. Any suitable means may be provided for supplying ink to the roller J, such, for instance, as a spatula operated by hand or the ink fountain illustrated in my prior patent, No. 440,756, dated November 18, 1890.

The surface of the inking rollerIis preferably formed of a number of annular disks 1) of felt, each disk being stamped or otherwise brought into the required form and a series thereof placed side by side in shaft 2' and forced together and held in place by nuts 6 The object of thus forming the inking roller is tosecure a surface free from a longitudinal'seam, such as would be had by wrapping a sheet of felt around a spindle. A part of the shaft of the inking roller i has its bearings in box G while the part i is adapted to ride over the inclined pieces D and E. Loosely pivoted to each box is a swinging finger L, which rides on top of the ledge of the base A as shown in Figs. 1 and 2. The position of the boxG and hence of the inking roller with relation to the stencil printing frame depends upon the position of said finger. As shown in Fig. 1' the finger is inclined to the base A and hence the inking roller is bearing upon the top of the stencil sheet; as shown in Fig. 2 the finger is vertical relatively to the base A and hence the roller is raised above the inking position.

The operation of my apparatus is as follows:-Starting with the apparatus in the position shown in Fig. 2 with the stencil sheet clamped in the frame 0 and held taut by the means described, a sheet of paper to take the impression is to be laid on the printing bed of the part B. lhcslidingframe is then moved in the direction of the arrow Fig. 2 when as the inclined portion E passes from under the shaft 2 the frame 0 will close on the printing bed 13, the inking roller however being held out of contact with the stencil sheet as the finger L remains vertical. Continued movement of the sliding frame brings the inclined portions D under the shaft 2' of the inking roller before the pin 1) is in position to contact with the finger L; further movementof the pin 1) will force the finger L into the inclined position shown in Fig. 1 and but for the presence of the incline D the inking roller would descend on the stencil sheet into inking position. On the backward movement of the sliding frame after the inclines D have passed from under the shaft 2 the inking roller descends with a gradual force, owing to the shape of the inclines D, onto the stencil sheet supply ink thereto during said backward movement up to the point where the inclines E begin. The shaft e now rides up said inclines and forces the inking roller and its boxes upward on the posts, and hence again brings the fingers L into their vertical position. During this movement however the stencil frame 0 by reason of the peculiar hook shape configuration of its incline E is thrown into the inimpression sheet is fed from the bed on the part B into the receiving portion M of the base A or onto a suitable table not shown in a manner well understood.

I claim- 1. In a printing apparatus the combination with a sliding frame of an inking roller movable vertically, a stationary bed supporting said roller, a finger depending from the roller bearing box whereby said roller is locked in its highest position, said finger being pivotally connected at one end with said box, its

other end being free and a pin on the sliding frame whereby said roller is brought into printing position substantially as setforth.

2. The combination with the base of a stencil printing apparatus having a sliding frame one part for the impression sheet and one for the stencil sheet, of a vertically moving inking roller and an incline at each end of said two part frame, whereby the position of the inking roller is governed.

3. In a printing apparatus the combination with a sliding frame of an inking roller movable vertically, a stationarybed supporting said inking roller an incline at each end of said sliding frame whereby said roller is moved vertically, a finger depending from the roller bea ring, and a pin on the slidingframe, one of said inclines being located with respect to said pin so as to raise said roller before the pin releases the finger substantially as set forth.

4. The combination in a printing apparatus of an inking roller, a box bearing at each end thereof, a supporting finger hinged at one end of said bearing its other end being free, said roller and bearings being adapted to be depressed by gravity upon the release of said supporting finger, apost for each bearingsupported on a stationary bed and a crossbar between said boxes whereby the inking apparatus may be readily removed, substantially as set forth. elined position shown in Fig. 2, whereby the i 5. The combination in a printing apparatus of an inking roller, an ink supply roller, a box hearing at each end of said inking roller, and an angular slotted bearing plate carried thereby to support said ink supply roller substantially as set forth.

This specification signed and witnessed this 29th day of December, 1892.

VILLIAM G. FUER'FII.

Witnesses:

W. PELZER, GEORGE B. CRoNK.

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