US1242927A - Paper-reel brake. - Google Patents

Description

i `Original application lfiled. LDecember 17,

'llllhlf anna ALBERT DU IBR'UL DECEASED, LATE OF FORT THOIEAS, KENTUCKY, BY FRANCES GOSELIN DU BRUL, EXEGUTRIX, OF FORT THOMAS, KENTUCKY, ASSIGNOR TO THE MILLER, DU BRUL 85 PETERS MFG. C0., OF CINCINNATI, OI-IIO, A CORPORA-k TION 0F OHIO.

PAPER-REEL BRAKE.

To all whom t may concern:

Be it `knownthatfinnland? DU BRUL, deceased, late a citizen of the United States, and resident of Fort Thomas, in the county of Campbell andState of Kentucky, did invent certain nen7` and. useful Improvements in Paper-Reel Brakes, of which the follow- .ing is a specification.

This. applicationis a division of an application led December 17th, 1913, Serial No. 807,256, lfor Letters Patent for improvements in cigarette machines, in which the subject'matter of the present application Was embodied by Way of illustrating one use for which it mightbe advantageously employed.

The invention relates to a device to be applied toa reelof paper or other material that is to be fed continuously to a machine that consumes the material in the production of goods or articles, and the invention has for its object to provide a simple and effective means that will absorb the excessive tensile stresses due to sudden starting of the machine or sudden changes in its speed, and Which Will also develop and automatically maintain a delicately measured braking effect upon the reel, so long as the reel is running and notwithstanding reduction in the diameter of the reel due to the consumption of the material.

y When a machine uses paper from a reel at a rate of speed which necessitates a rapid paying-out of the ypaper strip or Web, and particularly when the paper is comparatively thin, starting of the machine tends to snap the paper, and this tendency is aggravated if the reel over-runs or races' at the previous stopping, in a manner to pay out considerable slack paper, lthe reason for this being that the machine accelerates quickly While the slack is bein-g taken up, and the entire inertia of the stationary reel must be overcome by tension exerted through the paper in getting the reel started. If a friction brake be applied to the surface of the reel it increases the resistance ofthe i reel to starting andaggravates the trouble. If the brake resistance is reducedto decrease the danger of breakingthe paper, then there is' some slight over-running of the reel with consequent slack that augments the danger ci? breaking, and even if 'the brakingpressare i Specification of Letters Patent.

Patented Oct.. 16, i917.

1913, Serial No.v807,256. Divided and this application iled August 22, 1916. Serial No. 116,354.

`by providing the paper-reel brake embodying two main characteristics, namely, accurate adjustability to precisely the resistance desired. and automatic regulation of resistance, With variation in the diameter' of the reel. But While with these characteristics the advantages-of the invention may be realized to a highly important degree, a further characteristic is preferably embodied in order that the advantages may be realized' tothe fullest measure, which consists in an automatic slack take-up that imposes tension upon the paper attimes s, of starting in the taking up of the slack, and starts the paper reel gradually and Without danger of breaking the paper. Y

For purposes of illustration, an embodiment ofthe invention in form suitable for controlling the paper feed of a continuous cigarette machine, is shown and described in the present application, but ity is to be understood that the invention is not limited yto this particular use, but is applicable to paper fed from reels in lother types of industrial machinery, such for instance as feeding a thin stripl or web of paper to be twisted Figure l is a side elevation of a paper reel, suitably mounted for paying out toa paper-consuming machine, and having the preferred embodiment of the invention. associated therewith; and

n Fig. 2 is a top plan View of a braking device detached.

l represents a papervreel of standard type, rotatably secured by some convenient means, such as Wingnut 2, upon a spindle 3 carried'by a suitable support L roo In machines which draw paper from such a reel at a comparatively rapid rate, as for instance in high speed continuous cigarette machines, and particularly Where the pull of the machine lupon the paper is rendered somewhat irregular by variations in the resistance to the manufactured article passing through the machine, a reel Will feed quite irregularly, first speeding up and then hanging back, so, that excessive tension is imposed at intervals upon the paper, vvhich' paper is being fed, even though. the pull upon the paper maybe irregular. Different papers lvary greatly in the co-efrlcient offrictionthat will be developed by the brake shoe 7 with a given pressure imposed throughthe medium of the lever 5, and this variation in friction may be diEerent in the samepaper under different atmospheric conditions. In order to be able to adjust With exactness the frictional resistance imposed through the shoe 7, lever 5 is provided with a Weight 8 that is adjustable thereon in a manner to increase or decrease at.vvill, the pressure imposed through the lever. This Weight is conveniently rendered adjustable by means of a clamping strap 9 surrounding the hub or fulcrum-bearing 10 of the lever 5, so thatit may be fixed at any desired angle relatively to the lever.A Being offset from its center of adjustment, Which is the fulcrum 6 by means of its arm 11, such adjustment may be graduatedvvith exactness. Y

A further advantage of the described form of adjustment for the Weight 8 is that it automatically graduates pressure exerted through the lever 5 as thek reel l grows smaller With the unvvinding of paper therefrom. That isv to say, as the lever 5 descends and the Weight 8 vvith its arm l1 rises from the position shovvn in Fig. 1, the horizontal distance or leverage through Which the Weight acts upon the lever 5 VWill increase, and its counterbalancingeli'ect upon the lever, 5 Will correspondingly increase, so that as the diameter of the reel grows less'and the inherent resistance to rotation being overcomeV through a constantly smaller radius ofthe reel, the braking. resistance is correspondingly relieved and the tension on the paper approaches constancy. y j j The arm 11 may be adjusted to a position toward the left hand of F ig. 1y beyond the perpendicular, whereupon it will add to the braking pressure of the lever 5, and this may be necessary When the surface of the paper' to be n controlled Yis exceptionally smooth. But this does not change the principle Vof operation, for it yismobvious that When in a position to add its Weight to that of the lever 5, descent of the lever 5 Will tend to throvT the counter-Weight 8 farther away from the horizontal and toward the perpendicular, so that the braking effect Will be gradually reduced as the diameter of the reel reduces, just as in the instance first described.

AIn controlling the paper supplied to cigarette-machines and other machines employing comparatively thin paper, it will often be desirable to regulate the pressure of the shoe 7 s0 that there Will be a slight slacki ing of the 'paper when the machine is stopped. In order to take up this slack .and transmit gradually to the reel, the pull incidentl to starting the machine again, an

auxiliary ,brakelever V12 is pivoted at 13 to the lever 5 and yprovided With a brake shoe 14 through which it rests Vpreferably by gravity alone, upon the portion'of the paper web or strip extending avvayfrom the reel toward the consuming machine. This auxiliary lever takes up any slack in the web, as suggested by the dotted line position invvhich it is shown in Fig. 1, so that as soon as the pull is exerted of sufficient force to straighten the paper, lifting the Weight of the auxiliary lever l2 will impose suiiicient resistance to start'revolution of the reel gradually.

What is claimed is f l. In a material unvvinding machine, a

braking lever fulcrumed to act by gravity on the periphery of a reel of paper, and anV vauxiliary tensionv means mounted on said braking lever and yfree to act by gravity to materially defiect the vveb of paper after it leaves said reel, but yielding to permit straightening of the web, under tension on the Web.

2. In a material unvvinding machine, a

braking lever adapted to act on the periphery of a reel of paper, and an auxiliary tension means mounted on said braking lever and extending beyond the same to act by gravityv on the web of paper after it leaves said reel, deflecting said web of paper but yielding to permit it to straighten under abnormal tension, and an adjustable weight controlling the braking. action of said braking lever against the reel of paper. A

3. In a'vmaterial unwinding machine, a paper tensioning device comprising a fulcrumed brake lever, an adjustable balance Weight attached to said lever, and an auxiliary tension bar pivotally mounted on the braking end of said lever, and extending beyond the same in position to deiect the paper extending fromthe reel.

4. A combined constant braking and takeup device for material fed from reels, 'comprising an auxiliary brake lever yieldingly bearing against the material and adapted to take up slack therein at a point beyond the rcel, and a braking lever, upon which said auxiliary lever is mounted, adapted to bear constantly upon the reel of material, independently of 'the take-up action of the auxiliary lever.

5. A combined constant braking and takeup device for material ted from reels, com prising an auxiliary brake lever yieldingly bearing against vthe material and adapted to take up slack therein at a point beyond 15 the reel, and a braking lever, upon which said auxiliary lever is mounted, adapted to bear constantly upon-the reel of material, independently of the take-up action of the auxiliary lever; said auxiliary lever being 20 FRANCES GOSELIN DU BRUL,

Eeeutrz'a of the estate of Albert Du Brul,

deceased.

Copies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents, Washington, D. C.

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