US1287923A - Printing-press. - Google Patents

Description

0. V. DUTRO & A;,S. BURROUGHS.

PRINTING PRESS.

APPLICATION FILED NOV. 26, 19H.

1 ,287,923@' Patented Dec. 17, 1918.

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0. V. DUTRO & A. S. BURROUGHS.

PRINTING PRESS.

APPLICATION FILED NOV. 26. IQII.

Patented Dec. 17, 1918.

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1,287,923. latentml Dec. 17, 1918.

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UNITED STATES PATENT OFFICE.

ORVILLE V. DUTRO AND ARTHUR S. BURROUGHS, OF SPOKANE, WASHINGTON.

PRINTING-PRESS.

Specification of Letters Patent.

Patented Dec. 17, 1918.

Application filed November 26, 1917. Serial No. 2041,0633.

To all whom it may concern:

Be it known that we, ORVILLE V. Dtrrno and ARTHUR S. BURROUGHS, citizens of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented .certain new and useful Improvements in Printing-Presses, of which the following is a specification.

The present invention relates to improvements in printing presses, and is designed especially for the purpose of converting a single feed press-of the well known platen and bed type, so that the press may print either single sheets .or a continuous web which is afterward cut into sheets, as desired.

The primary object of the invention is an attachment with Which existing presses may be equipped, or new presses may be built With the present invention embodied therein, so that the press may have an alternative single sheet or c0ntinuous-web feed as desired.

The invention consists in certain novel combinations and arrangements involving the continuous web feed and means for severing the web into sheets after the impression has been made on the web, and in other novel features as Will. be fully described hereinafter.

In the accompanying drawings a Well known type of platen and bed press is illustrated as a complete embodiment of the invention, constructed and arranged according to the best mode we have so far devised for the practical application of the principles of the invention.

Figure 1 is a side elevation of a platen and bed press of usual single-sheet feed equipped with the present invention.

Fig. 2 is a longitudinal vertical sectional view of a frame extension, supporting parts of the invention, and adapted to be coupled to the original press.

Fig. 3 is a top plan view of the mechanism of Fig. 2.

Fig. 4 is an edge View, partly broken away of the delivery roller or roll of special construotion for frictional contact with the out or severed sheet to be delivered.

Fig. 5 is an enlarged view of the cutting knife or blade and its guard.

Fig. 6 is a view of the knife bar, one end beingv shown, looking. toward Fig. 5 from spective supports 4: and 5.

the right or from the rear or delivery end of the press.

Fig. 7 is a perspective view of the throw off lever showing its original formation in dotted lines, and showing in full lines the shape of the lever as used in the present invention, this element being the only memher of the original press to be changed in equipping the single-sheet press.

Fig. 8 is a view of an idle roll, which also performs the function of a gage bar;

In order toillustrate the preferred em bodiment of our invention attention is called to Fig. 1 where the well known form or type of Gordon press is illustrated which comprises the frame 1 in which are pivoted the platen 2 and bed 3 to oscillate on their re- The bed and platen are shown in position for making an impression and they are operated through the main driving pini0n'6 on the shaft 7 and driving gear 8 on the shaft 9, the usual side arms 10 being coupled to the eccentric shaft or rock shaft 11 which operates the inking fountain 12 which'has the usual inking rollers 13 and these rollers apply the ink in Well known manner. It will be understood that the press illustrated in the drawings may be used as a single-sheet feed press when desired.

In equipping the press according to the present invention, the web or paper 14 is supported on a spool 15 journaled in brackets 16 attached at the lower front end of the press, and the control of this feed spool is accomplished through the action of the friction finger 17 and spring 18, the former bearing on the roll to prevent slack in the web and regulate the movement of the roll or spool.

As best seen in Fig. l, the sheet of paper or web, passes upwardly and forwardly and over the idle roll 19 supported in the feed frame 20 free of the operating parts of the press, and a spring finger B is adjustably mounted on the feed frame to bear on one edge of the sheet or web and maintain it in true feeding position.

The web thence passes over the face of the platen in position to receive an impression when the platen and bed are brought together as shown, and then passes under a guide roll 21. After leaving the guide roll 21 the Web moves to the rear under impulse from a web drawing or pulling attachment best illustrated in Figs. 2 and 3. In these figures the web or paper is indicated in dotted lines, and is shown as being pulled or drawn downwardly from the guide roll 21 over and around a compensating device which comprises a pair of transversely located, spaced guide rollers 22, 23, supported in the extension frame 2% of the press by two end trunnions 25. These rollers may be moved and held in adjusted position by the use of the rock arm 26 located outside the frame, and adjustable in the slot 27 by means of the bolt 28 and nut 29. By means of this adjusting device the pair of rollers may be swung on their pivot to take up slack or to loosen the web, and in all cases to guide the web and hold it taut. V

The web is drawn from its spool over the guide rollers and through the press by means of the series of belts or straps 30 which pass around the main roller or cylinder 31 located just beneath the pair of guide rollers, and this main roller is revolved with a J o step or intermittent rotary motion from the eccentric or rock shaft of the press throna pitman 32 and gage lever 33 pivoted 3% in the frame, connecting link 35 and "let bar or ratchet lever 36 which has a pivoted pawl 37 thereon engaging the ratchet wheel 38 on the shaft 39 of the cylinder 31. it will thus be seen that with each revolution of the driving wheel, or each impression movement of the platen and bed, the cylinder 31 is revolved through these connections just described. The length of this rotary mov ment of the cylinder may be varied by moving the coupling sleeve 40 on the lever 33 which has a set screw 4C1 for holding it in adjusted position, thus either lengthening or shortening the leverage, and consequently the stroke of the lever. The belts or feed straps are spaced apart as shown, and a series of vertically projecting pins t2 set in a transversely arranged supporting bar 43 supported between the sides of the frame, act as guides for the belts as they pass to the front. At the rear the belts pass under a guide roll 44:, the belts functioning as an apron for the paper or web which lies on top of the apron and moves with it under this roller, up over a smaller guide roller 45, and then down again under the small roller d6. The web at the main cylinder or roller is of course on top of the apron, and remains in this relation until it reaches the roller 45, where it leaves the apron and passes through the sheet severing device. I

The sheet severing or cutting device is mounted upon a cross bar 46 attached at 47 47 to the sides of the extension frame. and formed with an elongated slot 48 through which the web passes. Curved guide fingers 49 are spaced across the frame and curved around the guide roller a5, and

memes toothed bar .9 extending the length of the slotted bar is positioned so that the web or paper must pass over the teeth as it leaves the roller and is guided through the slotted bar by the guide fingers. Positioned just to the rear of the cutting device. to receive the web, or rather a severed sheet of the web, is a friction roller 50, preferably corrugated, and the ridges of the corrugations are provided with friction rings 51, of material, as for instance rubber, and in the grooves 52 between the ridges the spaced guide fingers 53 of the feed bar are located. This friction roller has a shaft 54: journaled in the frame, and a drive wheel 55, and this drive wheel, by means of the belt 56 and pulley 57, the latter on the main drive shaft of the press (see dotted lines Fig. 1) rotates the friction wheel continuously at a greater surface speed. than the speed of the web or paper, but, although the paper passes over the roll, as seen in dotted lines Fig. 2 it evident the friction roll can not afi'ect the movement of the l per or severed sheet. Just above the it ction roll, and adapted to have a surface contact therewith is a weighted roll 58, journaled in a pair of oscillatable arms 59 which are in turn journaled in the sides of the frame by means of the rock bar 60. The rock baris rocked or oscillated through the instrumentality of a rock arm 61 (see Fig. 1) outside the extension frame and the pit man 62 which extends forward of the press to the second rock arm 63 and this arm is fixed on the rock shaft 64 which is supported in the press frame and oscillated by the cam arm 65 and wheel 66, the latter bearing on the cam disk 67 of the driving shaft. Now it will be evident that the weighted roller 58 will alternately be lifted or raised and lowered from friction-contact with the friction roller, and inasmuch as the friction roller moves with a greater surface speed than the paper, when the weighted roller is in contact with the paper, the friction on the under side and the upper side of the paper between the friction roller and weighted roller will be sufficient to draw the sheetfaster than its speed when moving with the apron. The result is that theend of the paper is grasped between these two rollers and they pull the paper over the toothed bar, tearing off a sheet, which may be afterward trimmed or out. After the sheet is torn 0d or pulled in the direction of its travel, the weighted roller is positively lifted from the paper and the end passes out over the friction roller so that a succeeding sheet may be pulled off when the weighted roller is again lowered. It will be noted that the impression movement of the platen and bed. the step by step movement of the large feed cylinder, and the positive'pulling action of the two friction rollers, are all synchronously arranged from the driving shaft of the press. After the sheet is severed, it falls upon the receiving table 68, and the sheets may be collected therefrom as usual.

By the utilization of the above described invention it is evident that time and labor may be saved, as a single attendant may supervise a number of presses as they are earh automatically fed, and the press will operate as long as the roll of paper is present.

The length of the sheet of paper to be cut from the end of the web may be varied by adjusting the movement of the weighted roller, it being evident that the lapse of time when the weighted roll is lifted from the friction roll will determine the length of paper, and of course this is accomplished by the use of various kinds of cam disks as 67. Several jobs may be run off simultaneously on the press, as it will be observed that a number of rolls of paper may be spaced along the length of the supply spool.

What we claim is 1. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron actuated from said mechanism for drawing the web from the spool, a fixed toothed bar, and a pair of friction rollers moving at a superior surface speed than the apron, for pulling the web over said toothed bar to sever a printed sheet therefrom.

2. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron co-acting with said mechanism for withdrawing the web, a pair of friction rollers moving at greater surface speed than the apron, a fixed severing device between the apron and friction rollers, a compensating device for the web, and means for varying the length of movement of the apron.

3. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron for drawing the web from the spool, means co-acting with and moving at a superior speed than the apron for severing a sheet from the web, and means for varying the length of movement of the apron.

4. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron for drawing the web from the spool, an intermittently revoluble supporting roller for the apron and means for adjusting the revolving movement of the roller, additional supports for the apron, and means co-acting with and moving at a superior speed than the apron for severing a sheet from the web.

5. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron co-acting with said mechanism for withdrawing the web, a pair of friction rollers moving at greater surface speed than the apron, a fixed severing device between the apron and friction rollers, a compensating device for the web comprising an adjustable pivoted frame and a pair of spaced guide rollers carried thereby, and means for varying the length of movement of the apron.

6. The combination in a web feeding and severing mechanism, of a supply spool and web thereon, an intermittently movable apron for drawing the web from the spool, an intermittently revoluble supporting roller for the apron and means for adjusting the revolving movement of this roller, additional supports for the apron, a compensating device for the web comprising an adjustable, pivoted frame and a pair of spaced guide rollers carried thereby, and means co-acting with and moving at a superior speed than the apron for severing a sheet from the web.

7. The combination in a web feeding and severing mechanism, of a sup-ply spool and web thereon, an intermittently movable apron co-acting with said mechanism for withdrawing said web, an intermittently revoluble supporting roller for the apron and means for adjusting the revolving movement of the roller, additional supports for the apron, a compensating device for the web comprising an adjustable, pivoted, frame and a pair of spaced guide rollers carried thereby, a pair of friction rollers moving at a greater surface speed than the apron, and a fixed severing device between the apron and friction rollers.

In testimony whereof we affix our signatures.

ORVILLE v. nu'rno. ARTHUR s. BURROUGHS.

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G.

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