US303903A

US303903A - Paper-cutting machine

Info

Publication number: US303903A
Authority: US
Publication date: 1884-08-19
Anticipated expiration: 1901-08-19

Description

(No Model.)

J. A. WHITE. PAPER CUTTING MACHINE.

,903. Patented Aug. 19, 1884,.

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J. ATNVOOD WHITE, OP PHILADELPHIA, PENNSYLVANIA.

PAPERnoUTTlNe MACHINE.

IIPECFCATION forming part of Letters Patent No. 303,903, dated August 19, 1884.

(No model) .To [AZZ Ll/71.0711, it may Bancaria.'

Be it known that l, J'. ATWOOD VH ITE, a citizen ot' the United States, residing-iu the city and county ot' Philadelphia, Stato of Penn! sylvania, have invented a new and useful lfnA provemcnt in PapcnCutting Machines, which improvement is fully set forth in the following specification and accompanying drawings, in whioh- 5 Figure l is a side olcif'ation of the machine for cutting papel', orc., embodying my invention. Fig. 2 is a top or plan view thereof. Fig. 3 is a sido elevation oi' a portion opposite to that shown in l. Fig. eL is a section of a detached portion, enlarged, in line .fr 9;, Fig. 5. Fig. 5 is a section of a detached pon tion, enlarged, in line y y, Fig. 4; and Fig. G is au end view ot' an expanding feed-roll.

Similar lei-ters ot' reference indicate corre sponding parts in the several iigures.

My invention consists ot' certain improvements .in paper-cutting machines, as will he. hereinafter fully set t'orth, and specifically pointed out in the claims.

Relerring to the drawings, A represents the frame oi' the machine, on which is mounted the feed-roll l, the shaft B' whereof carries an internallytoothed ratchet-wheel, C.

D represents a pinion, which is loosely fitted on the' huh oi" two arms, E, mounted ou the shaft B', said pinion having formed with or secured to it lugs D', which are adopted to engage with lugs D on the arms E.

To the opposite ends of the arms E there are pivoted pawls F, so disposed that they engage witlrthe teeth ot the ratchet-wheel C, the op` erationwhereoi' will be hereinafter more fully described.

To the iramc A ispivoted. a toothed segment, G, which adapted to engage with the pinion D, and said segment is formed with an arm, H, having a curved slot, H', which extends from n. point near the pivot ofthe segment to the upper part thereof', starting at about a right angle with a radius drawn from the point ol' contact of the segment and the pinion when the pu'ts are in position, as shown in Fig. 1,said slot curving slightly, so as to he brought somewhat toward the pinion D, as it is carried away from the pivot of the segment.

J represents a driving-pinion meshing with a gear-wheel, K, both mounted on the frame A of the machine, said gear-wheel K having adjustahly connected with one of its arms a stud or roller, L, which moves in the slotH' of the arm HL The shaft of the gear-wheel l( has secured to it a cutter or knife, M, and the frame has connected with it the hed-knife N. (Both more clearly shown in Fig. 3.)

P is a toothed wheel mounted on the shaft B otl the feed-roll l, and opposite to the ratchet-wheel C, the teeth b ot' said wheeljheing pointed.

Q represents an arm which is pivoted or hinged to the frame of the machine at the end opposite the rovolvin g cutter, said arm Q hav ing a detent or tooth, R, which is adapted to engage with the teeth Al) of' the wheel P.

Mounted on the shaft of the revolving` cutter, opposite to the geanwheel K, is a cam, S, so disposed in relation to the arm Q that said arm is raised by the cam S for the purpose of disengaging the detent or tooth lt Afrom the wheel P at proper intervals. A spring, Q', is attached to the arm Q, and serves to keep the saine in firm and positive contact with the cam S, and insure the prompt action of the tooth It on the wheel P. The ratchet-wheel C is encircled by a friction strap or brake C', which is attached to the f rame A. of the inachine by a stud or pin. c, and the tension of which may be adjusted hy the thunih-nut d and spring c, said nut engaging with, a bolt, d', which passes through lugs e' on the ends ot' the strap, and is encircled bythe spring c. A frictioirbrake D, similar in construction to the brake C', encircles the huh ofthe piliion l).

The construction of the ratchet mechanism is as follows: The pawls F have each at the heel end a lug or projection, F', (see Figs. 4 and 5, i) which is opposite to the lug D", and so disposed that it maltT be struck by the lug` E' on the huh of the pinion l), and bolts g and springs l1., fitted to the arm E, serve to keep the pawls F in contact withthe teeth of the ratchetwheel G-,the heads oi' the bolts hearing against lugs on the sides oi' the pawls, thus forcing the pawls toward and against th e ratchettceth.

The operation is as follows: Power is applied to the machine, and the sheet to be cut placed between the feed-roll B and the upper feed-roll, B". The pinion J rotates the gearwheel K, whereby the stud or roller L op- IOC) erates the segment G, whose motion will be oscillating, as is evident. The segment G imparts motion to the pinion D, and the lugs D of the hub whereof strike against the lugs D on the arms E, which carry the pawls F. It will be seen that the arms E, and conscquently the pawls F, are carried around with the pinion D, and thus the paper is fed,owing to the ratchet-wheel Cbeingkeyed to the shaft B of the feed-roll B,the paper being advanced over thebed-knife-N the required length, the cut being then made by the revolving knife M. The slotted arm His now in such position that, as the wheel K continues to rotate, the Segment G, and consequently the pinion D, rotates in reverse direction to that previously described, thus causing the lugs D to strike the lugs F of the pawls F, and rock the pawls sufficiently-to clear the teeth of the ratchetwheel C, and returning the pawls to their rst position, this operation being accomplished without clicking noise, as is evident. W'hen the pinion is again operated by the segment, which is in reverse motion to that last stated, the lug D leaves the lug F, and the springs h force the bolts g against the pawls F, and the latter are reliably thrown into engaging contact with the ratchet wheel C, whereby the ratchetwheel is again rotated, its motion being communicated to the feed-roll. The feed motion begins when the segment G is at its lowest point, the stud or roller L then being at the bottom of the slot H. Consequently, owing to said slot H' and action of the roller L therein, the segment begins its n10- tion slowly, whereby the sheet is not started abruptly and torn. After the start is fairly made the segment gradually increases its motion, and thus quickly completes the advance or feed of the sheet. hen the feed of the sheet is made, the arm Q falls, and its tooth R drops on the'wheel P, entering the space between two adjacent teeth b of said wheel, and when it sits true in said space the feed-roll is held in the exact place required to cut the sheet into uniform lengths. Should, however, there be a springing of the sheet-,whereby it is advanced too far, or should its advance be insu'liicient, the position of the teeth b of the wheel P is such that the tooth R presses against either of the two teeth between which it enters, thus slightly returning or advancing the feed-roll until the true position of the tooth R is attained, whereby the sheet is so set or its position corrected relatively to the knife or cutter that the lengths of the sheet removed or cut are uniform. It will be seen that owing to the spring Q', should the feed roll or wheel P fail to move, the spring Q permits the arm Q to yield, thus avoiding injury to the detent or teeth of the wheel P. As soon as the cut is accomplished, the arm Q is raised by the cam S, and its tooth R clears the wheel P, whence the intermittent feeding operation may be repeated., The tooth R is attached to a saddle or holder, R', which encircles the arm Q, and is longitudinally movablelthereon, so as to adj ust` the tooth with precision to the teeth of the wheel P, the holder' being retained in adj usted position by the set-screw R.

' The sheets are cut from a roll of paper, and the cut sheets carried from the machine by an endless apron or belt, all of which are well known in machines of this character.

In lieu of two arms E and two pawls F, I. may employ a single pawl for engagement with the ratchet-wheel, in which case one of the arms is dispensed with.

In Fig. 6 I show an end view of an expanding feed-roll, the periphery whereof is formed of sections or segments,\-which are connected with radial arms niovably fitted to the body of the roll, thus adapting said periphery to be adjusted with precision relatively to the work to bc accomplished by the roll.

Having thus described my invention, what I/clai 1n as new, and desire to secureby Letters Patent, is-

l. feed-roll, in combination with the pinion D, and an internally-toothed ratchetwheel having a pawl adapted to be removed from the teeth of said ratchet by means of a lug on the pawl and a lug on said pinion, the two lugs engaging on the return motion of the pinion, substantially as and for the purpose IOO of the lug on the pinion, substantially as and for the purpose set forth.

3. A feed-roll, in combination with a ratchet-wheel, a pawl having a lug, an arm carrying the pawl and formed with a lug, a pinion provided with a lug, said arm and pinion being loosely fitted on the hub of the ratchetwheel, and gearing imparting rotary yreciprocating motion to said pinion, substantially as and for the purpose set forth. y

4. rIhe feed-roll and its shaft, in combination with a ratchet-wheel fixed thereto, a pawl, a loosely fitted arm carrying said pawl, a loosely-fitted pinion with a lug which engages with said pawl., a toothed segment gearing with the pinion and provided with a slotted arm which is connected with the segment, and a stud which is secured to a wheel and 4projects iuto the slotted arm, substantially as and for the purpose set forth.

5. A feed-roll, a toothed disk, a cani, and a.

spring, and an arnroperated by said cam and spring, in combination with a detent which is inovably tted to said arm, whereby it may be longitudinally vadjusted thereon, substantially as and for the purpose set forth.

J. ATWOOD VHITE.

IVitnesses:

JOHN A. WIEDERsHi-Jnvr, NV. F. KIRCHER.

IIO