US976735A - Paper-feeding device. - Google Patents

Description

G. E. HARDMAN.

PAPER FEEDING DEVICE.

APPLICATION FILED NOV. 25, 1909.

WITNESSES. v ;MVENTOR A izf A T/ 35 lf at mted Nov. 22, 1910.

UNITED STATES PATENT ornrcn.

GEORGE EDWARD HARDMAN, or ms'r HAM, Lennon, iiiietimn, ASSIGNOR TO cam;-

BONUM COMPANY LIMITED, OF BRITAIN AND IBELAND.

PAIER-FEEDING mivxn.

Specification of Letters Patent. Patented Nov. 22, 1910.

Application med some 26, 1909. Serial No. 529,975.

chines of the kind in which the sheets are,

fed forward one at ,a time by means of a transverse rod covered with pads or tubes of corrugated rubber the said rod-resting upon the pile of sheets and being reciprocated backward and forward for each revolution of the cylinder.

In mechanism for feeding single sheets to printing mechanism it has been proposed to employ reciprocating wheels each provided with pawl and ratchet mechanism whereby the wheels were able to roll freely over the sheets during the backward reciprocation, but were prevented from turning during their forward reciprocation thus producing friction between their peripheries and the uppermost sheet whereby the latter was fed forward. Thispawl and ratchet mechanism j was, however, open to var-ions objections,

and the object of the present invention is to provide an improved device whereby the rotation of the reciprocating feed-roller can be controlled in the manner described above.

According to this invent-ion a reciprocatr g rubber. covered feed-roller or feed wheels suitably adjustable is 01' are provided with a friction clutch or clutches which can run free during the backward reciprocation but can bind during the forward reciprocation. Such clutch or clutches may be the ordinary free wheel ball or pawl wedging devices.

In a preferred construction a roller is mounted loosely upon an axle that extends transversely across the machine above the pile of sheets, and that is secured at each end, for example, to links, forming parts of any suitable mechanism for reciprocating the axle. At one end of the roller a ballclutch is provided, one member of which is secured to or forms a part of the roller, the other being secured to the stationary axle.

One of the parts of the clutch may consist of an inrier circular roller or wheel, grooved on its periphery, and secured to. the roller; the other part may consis'tof an eccentrically bored she I, which is fitted over the grooved inner rolleron wheel, and is secured upon the axle. I A race of varying widths is therefore formed between the inner clutch roller and the inner periphery of the eccentric shell; in this race a ball is inserted, the size of said ball being rather smaller than the greatest ,width of the race, but larger than The result 4 the smallest 'w'i'dth of said race. is that when the roller is reciprocated backward the ball moves toward the wider portion of the race, while when the roller is reciprocated forward the ball is forced toward the narrower portion of the race and consequently locks the roller from turning.

In the accompanying drawings is illustratedas an example one embodiment of the invention.

In these drawings: Figure 1 is a sectional LONDON, ENGLANDfi CORPORATION OF GREAT elevation of one construction of feeding' mechanism according to this invention ap-- plied to a rotary duplicating machine, some parts of which are shown also, and Fig. 2 is a sectional plan of same.

A is the feeding roller, B the fixed axle, and A, B the clutch members, A consisting of a grooved roller secured to the feeding roller A and B consisting of an eccentrically hollowed shell secured to the axle B by means of a set-screw B.

In Fig. 1 the variation in the width of the race C is shown, a ball C being shown therein. It will be seen that when the roller A is moved backward (or to the left) the part B will not rotate and the part A will rotate counter-clockwise thus tending to force the ball G into the wider portion of the race C, but when the said roller is drawn forward, that is to say in the direction of the arrow (Fig. 1), the part A will tend to rotate in the opposite direction clockwiseand since the part B is fixed, the

ball will be forced into the narrower portion of the race C thus wedging between the parts Aand B and preventing the former, and consequently the roller A, from moving, so that it will friction-ally engage and draw forward the sheet of paper it is resting on. The part B is provided with a pin B to prevent the hall from affecting the rotation of the roller A during its backward recipropreferab cation. The roller A abuts at one end anism the link a, is connected to the driving wheei (notshown) and operates an arm b mounted upon one end of a shaft 6 which carries an arm 0 at each end. These arms 0 are each connected by means of links at to slides d which are in turn connected to each The slides d end of the axle B by links (1?. reciprocate upon guide rods (i The axle B may be fixed in the end of one of the links (2 by means of a set screw d;

What I claim is A paper feeding device comprising a roller, elastic paper contacting" bands carried by the same and adjustable thereon, an axle on which said roller is rotatably mounted, a hollow casing secured to the axle at 30 one end of the roller, a wheelsecured to-the roller at the same end and projecting into the casing said casing bein bored eccentrically and cooperating with the wheel to form a race of varying width, a ball within the casing and adapted to be engaged 'between the casing and the wheel so as to prevent the roller from rotatin in one direction, a pin carried by the casing for rendering the ball inoperative when the roller is rotated in the opposite direction and means for reciprocating the carrying axle.

Intestimony whereof I have hereunto set my hand in the presence of two subscribing wltnesses.

GEORGE EDWARD HARDMAN.

. Witnesses:

W. BoRNHoFr, HUGH M. DUNSTAN.

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