US1270279A - Tension mechanism for paper-rolls, &c. - Google Patents

Description

J. T. FERRES.

TENSION MECHANISM FOR PAPER ROL'LS, &c.

. APPLICATION FILED JAN. 15. I916. 1,270,279. Patented June 25,1918.

1 is a SHEETS-SHEET 1. w 'T ig N I D N I N W w Q J. T. FERRES. TENSION MECHANISM FOR PAPER ROLLS, 64c.

APPLICATION FILED JAN. 15. I916- Patented June 25, 1918 KSHEETS-SHEET 2.

J. T. FERRES.

TENSION MECHANISM FOR PAPER ROLLS, 6m.

APPLICATION FILED JAN. I5. 1916.

1 ,270,279. Patented June {25, 1918,

3 SHEETS-SHEET 3- JEFFREY T. FERRES, OF LOS ANGELES, CALIFORNIA.

TENSION MECHANISM FOR PAPER-ROLLS, 8w.

Specification of Letters Yatent.

Patented June 25, 1918.

Application filed January 15, 1916. Serial No. 72,256.

To all whom it may concern Be it known that I, JEFFREY T. FERRES, a citizen of the United States, residing at Los Angeles, Los Angeles county. California, have invented certain new and useful Improvements in Tension Mechanism for Paper-Rolls, &c., of which the following is a specification.

. My invention relates to tension mechanism for rolls of paper or other material which is wound in roll form or on reels and drawn therefrom by the machine which utilizes or manipulates the paper or other material whatever it may be. The principal object of my invention is to provide simple and etticient tension mechanism for automatically applying tension to the roll in proportion to the diameter and weight of material in the roll. At the beginning when the roll is at its greatest diameter and heaviest weight the sheet as it is being withdrawn from the roll has the greatest amount of leverage because of the large diameter of the 'roll and consequently the greatest amount of tension may be applied to the roll. However, as the sheet or other material is consinned and the diameter of the roll therefore decreases, the leverage of the sheet correspondingly decreases and the tension should be correspondingly relieved. My invention provides a mechanism for meeting these conditions with the result that such mechanism automatically applies tension to the roll in proportion to the weight and diameter thereof, with the result that the tension on the sheet automatically remains the same whether the roll is large or small in diameter.

Another object of my invention is to provide simple and efficient means for adjusting the entire tension mechanism and the roll on the main frame so as to bring the sheet in alinement with the machine I for,

proper working purposes. Still another object of my invention is to provide simple and efficient means for securinothe roll to its shaft and also to accommodltte different lengths of roll.

In the drawings Figure l is a plan view of my tension mechanism showing the roll of material in dotted lines; Fig. 2 a section on the line 22 of Fig. 1 but on a larger scale; Fig. 3 a section. on the line 33 of Fig. 2; Fig. 4 a section on the line 4-4 of Fig. 1, but on a larger scale; Figs. 5 and 6 sec tional elevations on the lines 55 and 6--6,

respectively of Fig. 1, but on a larger scale;

F ig. 7 -a plan view of the parts shown in Fig. (5 but with the roll removed; Fig. 8 a section on the line S8 of Fig. 5; and Fig. 9 a section on the line 9 9 of Fig. 5.

lVhile my invention may partake of different forms or embodiments, I have shown herein a comparatively simple, efiicient and practical construction for the purpose and I will now proceed to describe the same without intention of limiting myself to details of construction except as may be required by specific claims. Moreover, while my invention has been primarily designed and adapted to rolls of paper it will be understood that my invention is not limited to this particular use but that it may be applied to rolls or reels of any material. However, for the sake of convenience I will refer to the roll as a paper roll nd consequently the material withdrawn rom there as a sheet of paper.

As shown in Fig. l. the paper roll A illus trated by the dotted lines is supported upon a rotatable shaft 1, supported at its opposite ends in bearings open at their upper ends so that the shaft may be readily removed for; the purpose of replacement and the insertion of a fresh roll. One of the bearings 2 is sup-' ported in any suitable manner, as by means. of a part of a main frame 3 while the other bearing 4: is in the form of a yoke Whose manner of mounting will be hereinafter described in detail. The roll shaft is provided with two adjustable heads 5 and 6 movable. against ends of the roll for clamping or' binding the'samc onto the shaft. The head 5 gives a large adjustment whereas the head i 6 gives the fine adjustment. '95

Referring to the head 5 the same is provided with a tapered sleeve portion 5 which i I engages the center opening of the roll. The, body of this head is. provided with a springpressed plunger 7 adapted to engage in anyone of a series of holes 8 spaced apart and extending longitudinally of the shaft. By withdrawing the plunger the head 5 may. be moved to any position on the shaft and held thereat by the engagement of the plum-1 ger 7 with the particular hole 8 by which the head has been adjusted.

Referring to the other head 6, the same comprises a circular collar portion and a sleeve portion (3 extending inwardly andengaging the central opening in the roll. This end of the shaft on which the head 6,

is mounted is screw-threaded and provided with the longitudinal key-way 1 adapted to receive a key 9'which is held within-the inner wall of the sleeve extension 6 by means of the screw 10. This collar is there fore capable of .being moved or adjusted longitudinally of the shaft. For this purpose this-head or collar 6 is operatively connected with a rotatable sleeve 11, screwthreaded onto the shaft 1 and having a hand wheel .12'f0r1rotati0n purposes. This sleeve is provided wit-h a circumferential flange 13,

fitting-within the collar-6 and having a-pehead.

Thebeaging 4 ofthe roll shaft is .in the formofa yoke as-shown in Fig. 6 andprovided with a downwardly extendingstem'16 movable in and guided by a vertical openingji'nabracket 17. This bearing is upwardly spring-pressed by means of a spring 18 in said opening hearing at one en againstthe stem 16 andat its other end against the inner end of a rotatable adjust- -ing screw19 screwing into the lower end of the 'bracket with the result thatthe tension of the spring may be increasedior decreased causing this "hearing to carry a less or greater amount of the "weight of the roll as I desired. Asa matter of fact, two rolls of paper weighing the same and of the same diameterfbut differing in the thickness of the paper of which they consist, require di'fi erent degrees of tension on account of "the difierence in thickness of the paper.

This is accomplished, as above stated, by carrying'part ofthe weight of the rolls on the bearing it, screwing up of the screw 19 reducing the friction as hereinafter expinned.

By preference and for the purpose of bodily adjusting longitudinally the entire roll --of paper and itsfshaft, with respect to the main frame 3' of the machine, this bracket ismade separatefrom such frame and constructed in such away as to slide horizontally with respect'thereto; As shown iir Fi-gs. 5, -6 and 8, this bracket is dovetailed into one end of the main frame. In order thatthe-necessary machine work -may be {done i on separate small parts instead of a' lar'gepart such as the "main frame I- provide a removable plate 20 secured to the mainframe by means of two slide plates 21 secured to the main frame by means of bolts 22. These plates 21 are of course undercut to provide for the dove-tail slide and are adapted to receive the dovetailed slide portion 17 of the bracket 17. This bracket has on its dove-tailed portion an inwardly extending flange 17*, Fig. 8 pro vided with an opening 17 through which passes an adjusting screw 23, the latter being .held against removal by means of the set screw 24 engaging a peripheral groove 23 in .such screw. This adjusting screw screws into a :flange 20 ofthe plate 20 with the result-that as the hand-wheel 24 of the adjusting screw is rotated the bracket andallzparts supported thereby are adjusted horizontally with. respect to the main frame 3.

Referring further to anisni the same. comprises, as herein shown, a pair of-pivoted .shoes 25' adapted to. engage theibottom edge and also .two opposite edges of a friction wheel or drum 26 secured to one end of the roll shaft 1,-at a pointbeyond its yoke bearing 4. These shoes are pivoted intermediate their ends on pivot pins 27 mounted in horizontal, openings in oppositely extending arms 17 of the bracket 17; 1By preferenceeach of these shoes presents to the wheel or drum two separate friction surfaces, one at each end thereof to provide friction simultaneously at the bottomedge and aside-edge of :the-wheel. Howeverr by preference these shoes do not immediately contactsuch wheelbuta friction lining 28 of leather orothersuitable material is applied to the inner faces of theseshoes. i i "In practice the weight of the roll is not permitted to rest,to any considerable extent upon the yokefbearing 4, but mostly upon the friction lining-28 at the lower endsof the-shoes. Inasmuch as these shoes are pivotedat points intermediate their length it follows that the upper ends of these shoes are braced against opposite sides of the wheel 26 witha pressure corresponding'in amount to the weight of the roll. -If,'then,

weak paper is being "run, the screw 19 is operated to yieldingly press the yoke bear ing' 4, which is relatively jfree-running, upwardly, thus relieving tosome extent the frictional orjbraking effect of the shoes 25, while if a heavier stron-g paper is being used the screw may need to be-operatedito lowerthe yoke and thus increase the friction and consequent tension on thesheet. Obviously asthe-sheet of'paper or other'mate rial. is fed-off from the roll andthe roll gets lighterthe npwardstress of' the spring 18 tending to lift the yoke against the free running-shaft 1 will relieve theshoes of an amount of pressure determined by the adthe tension mechjustmei'it of the spring, and the remaining pressure, carried by the shoes, will gradually be reduced as the roll becomes smaller and lighter. Therefore, as the roll gets smaller the frictional effect of the shoes and tension on the sheet of paper is decreased in proportion. The spring connection between the screw and yoke permits the weight of the roll, which in all cases is supported largely by the shoes, to act. freely upon them, so that the compensating effect of the diminishing weight of the roll as it gets smaller is fully realized. As a result of the adjustment of the yoke it. and the compensating effect of the varying diameter and weight of the roll, there is no danger of tearing the paper or other material as would be the case if the same amount of tension were applied to the roll from beginning to end.

I'Vhen the first roll of a new lot of paper is being applied the adjusting screw 19 is adjusted so as to take the necessary amount of the weight of the roll, as different papers require different degrees of tension according to their thickness and strength. The lower ends of the shoes are limited in their extreme downward movement by means of stop pins 29 on the sides of the bracket 17.

In order to provide for adjustment of the shoes inwardly in order to take up any wear of the friction lining 28 these pivot pins 27 are pivoted with an eccentric portion 27 received within the arms 17 with the result that when the pins are slightly turned by applying a wrench to the angular portion 27" the shoe is moved inwardly toward the friction wheel 26. The pin is clamped in its adjusted position by means of the nut 30 and washer 31 and such pin is held against endwise removal by means of the set screw 32 in each shoe and engaging a peripheral groove 27 therein.

I claim:

1. In combination with a roll and its shaft, a friction wheel thereon, tension mechanism including a pivoted shoe supporting such wheel and also bearing constantly thereagainst with a pressure proportionate to the weight of the roll.

2. In combination with a roll and its shaft, a friction wheel thereon, tension mechanism including a pivoted shoe in the form of a lever one of whose arms supports such wheel, and the other of whose arms bears constantly against the member with a pressure proportionate to the weight of the roll.

3. In combination with a roll and its shaft, a friction wheel. thereon, tension mechanism including a pair of pivoted shoes in the form of levers whose similar adjacent arms support such wheel and whose other arms bear constantly against opposite sides of said wheel with a pressure proportionate to the Weight of the roll.

4. In combination with a roll and its shaft, a friction wheel thereon, a pair of pivoted shoes in the form of levers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are lllOVttbl. against opposite sides of said wheel with a pressure proportionate to the weight of the roll.

In combination with a roll and its shaft afrirtion wheel thereon, a pair of pivoted shoes in the form of levers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are movable against opposite sides of said wheel with a pressure proportionate to the weight of the roll, and a withdrawablc bearing for supporting the shaft when the said wheel is not supported by the shoes.

(5. In combination with a roll and its shaft, a friction wheel thereon, a pair of pivoted shoes in the form of levers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are movable against opposite sides of said wheel with a pressure proportionate to the weight of the roll, and an adjustable spring pressed bearing for supporting the shaft when said wheel is not supported by the shoes.

7. In combination with a roll and its shaft, a friction wheel thereon, a pair of pivoted shoes in the form of lovers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are movable against opposite sides of said wheel with a pressure proportionate to the weight of the roll. a bracket having oppositely extending arms in which the shoes are pivoted, and a withdrawable bearing mounted in the bracket for supporting the shaft when said wheel is not supported by the shoes.

8. In combination with a roll and its shaft, a friction wheel thereon, a pair of pivoted shoes in the form of levers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are movable against opposite sides of said wheel with a pressure proportionate to the weight of the roll, a b ncket having oppositely extending arms in which the shoes are pivoted, and having a bearing for the shaft including a yoke having a stem movable in the bracket, a spring bearing against such stem, and an adjusting screw cooperating with the spring.

9. In combination with a roll and its shaft, a friction wheel thereon, a pair of pivoted shoes in the form of levers whose similar arms support and apply friction to the bottom of the wheel and whose other arms are movable against opposite sides of said wheel with a pressure proportionate to the weight of the roll, and means whereby the shoes may be adjusted toward and away from the wheel.

10. In combination with a roll and its shaft, a friction WllGGl thQlQOIl, a pair of pivoted shoes 1n the fQlj', n of levers Whose similar arms support and apply frict on 'to the bottom of the Wheel and hose other arms are m v ble aga nstbpno id s Of said Wheel yvith i pres pr p rtionate t0 the eightfof the roll, and eccentricfpivot pins for the shoes which pins are adjustable rotarily to adjust the shoes toward and away from the Wheel.

11. In combination with a roll, a main frame a removable plate thereon, dovetail slides secured to the frame and holding said plate in position, a bracket having a portion cooperating with said slides and arrangedto move horizontally on the frame, and tension mechanism supported on the bracket and cooperating With the roll to provide tension therefor.

12. In combination with a roll and its shaft,a friction Wheel secured to said shaft, tension mechanism including a pair of pivoted shoes arranged to support said heel and also bearing constantly thereag ainst with a pressure proportionate to the Weight of the roll, and a relatively free-running, adjustable bearing cooperating with the roll for supporting a predetermined amount of l the eight thereof.

.form Qfa yokeengaging s d t; dju

ablea nd elasticmieans' for pressing the yoke u wa d tosupport a predetermmed part of the Weight ofthe roll, andfrictional bearing members arranged to support, the remaining po rofthe Weight of the roll and'supply friction proportionate to such remaining portion of the Weight. a

,lel. In combination with a roll provided with ashaft, free-running bearing having a vertical stein, spring tension tending to lift sai d'ste n, adjusting means for varying the tension "ofthe spring to lift a predeterminedportion of the eightjof the roll, and a pair of rocking ,frictionishoes arranged to support the remaining portion of the Weight of the roll and supply friction proportionatet'o such remaining portion of the eight.

JEFFREY T. FERRES;

Witnesses:

Geo. F. Brennan, JOSEPH STEIN.

Copies of this gamut-may be obtained forfive cents each, y aqaressing the Commissioner of Ifa tents,

was hingto n l l gi"

Images