US1164586A

US1164586A - Roll-tightening machine.

Info

Publication number: US1164586A
Application number: US2352915A
Authority: US
Inventors: James Duvall
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-04-23
Filing date: 1915-04-23
Publication date: 1915-12-14
Anticipated expiration: 1932-12-14

Description

5. DUVALL.

ROLL TIGHTENING MACHINE.

APPLlcATloN FILED APR.23,1915.

Patented ne.14,1915.

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J. DUVALL.

ROLL TIGHTENING MACHINE. APPLICATION FILED APR.23.1915.

191495@ Patented Dec. 14, 1915.

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.i ria c JAMES DUVALL, OF CAMAS, WASHINGTON.

ROLL-TIGHTENING MACHINE.

Specification of Letters Patent.

Patented Dec. la, lgll.

Application filed Apr123, 1915. Serial No. 23,529.

To all whom it may concern:

Be it known that l, JAMES DUVALL, a citi- Zen of the United States, and a resident of Camas, Clarke county, llVashington, have invented a new and useful Improvement in Roll-Tightening Machines, of which the following is a specification.

My invention relates to devices to be used for tightening rolls of paper or other material, and it is particularly designed for winding up toilet paper into compact rolls of uniform size. n l

As well known, the strip of toilet paper is fastened at its initial end to a hollow paper core, and since the material has low tenn sile strength, the roll must necessarily be wound rather loose, in order to prevent the breaking of the strip. But the rolls so ob` tained are too loose for practical purposes,

and so it is found desirable that they be re wound into a more compact form, in order to facilitate handling and packing.

To this end, one of the main objects of my invention is to provide -a machine which will automatically rewind the roll from within,v and the device which l have provided for this purpose comprises the combination of a rotatable shaft, adapted to receive a hollow-core roll, means for intermittently rotating the shaft, means for exerting a hold on the interior of the hollow core of the roll placed on the shaft, to thereby pre vent the rotation of the core about the shaft, but nevertheless permitting it longitudinal movement on the latter, as required for placing the roll on the shaft, and removing it therefrom; and means for exerting a frictional hold on the exterior of the roll mounted on the shaft, while such roll is in its normal state, but releasing such hold when the roll is rewound in such compact form as to reduce the same to a predetermined diameter.

The details of the mechanical means which are so combined in my machine, and the operation of the latter, are fully illustrated in the accompanying drawings, in which,

Figure 1 'is a side elevation of -my machine; the spring friction arm which holds the roll against rotation being shown in section; Fig. 2 is 'a vertical -sectional elevation bf the parte 'shown --n l.; Fig- `E isa plan view of the top of my machine; Fig: t is a larger sized fragmental vertical section of the mandrel on which the roll is mounted. The core of the roll is shown 1n section so as to illustrate the manner in which the mandrel grips said core, so as to prevent rotation of the core relative to' said mandrel; Fig. 5 is a horizontal section taken on'the line 5-5 of Fig Ll; the core being shown in broken outline; Fig. 6 is a larger sized horizontal section showing the details of the friction gear operating mechanism; Fig. 7 is a vertical section taken approximately on the line 7%-7 of Figs. 2 and G; and Fig. 8 is a detail view of the sleeve provided with a cam slot, by means of which the friction gear is thrown into operative state.

ln the drawings, a, a represent the side frame members of my machine; Z) is a topplate provided with a vertically projecting hub c, and d is a bracket provided with-the bearing arms e, f, and g, said bracket CZ being bolted to the frame member a. See Fig. 2. Bolted to the frame member a is a. bracket 71 provided with a bearing-hub z', the latter being in axial alinement with the bearing arm g, of the bracket (Z. A. radial stud-pin y', projects internally in the hub i. See Figs. 2, 6, 7 and 8. A sleeve 7c, made with an integral lever arm Z, is provided with a helical, peripheral cam slot m, through which the stud-pin y', projects. Said sleeve is rotatably journaled in the hub z', and the rotation of said sleeve le, will cause the latter to move longitudinally to the position shown in the broken lines of Fig. 8. rlhis movement is due to the cam action produced by the slot m, working on the fixed stud-pin j. A foot-lever n, piv otally mounted on the stud o, in the frame a, is connected to the lever arm Z, by a link p. A spring (7, normally holds the parts in the position shown in the full lines of Figs. l

and 8. A constantly driven shaft r is roy tatably mounted in the bearing Varm g, and the sleeve la, said shaft being reciprocable in the bearing g. On the outer end of the shaft r, adjacent the sleeve lo, is setscrewed a coll-ar s, and pinned on the shaft adjacent the other end of .the sleeve 7c, and located between the two frame members a, a', is a friction :gear By lreason ef `this I'eonstruc tion, a depression of the foot-pedal n, will cause the shaft 1^, and thereby the frictiongear t, to be displaced longitudinally along the axial line of said shaft r. rI`he shaft r is continuously driven by means which are not shown in these drawings. The bearing arms e and f of the bracket Z are in vertical alinement with the hub c, and rotatably journaled therein is a vertical shaft u. A friction pinion 'zi is adjustably fixed on said shaft u, by means of a set-screw w, and the slot This adjustment allows the speed of rotation of the shaft u to be regulated. The upper end of the shaft u is provided with a collar 2/, seated in a recess a, of the top plate b, which collar prevents the shaft ,i/ from vertical displacement downwardly. The collar 2ixed on the shaft and bearing against the lower face of the hub c, prevents the shaft u from vertical displacement upwardly. The mandrel 4, located above the top plate b, is an integral part of the shaft u. vSaid mandrel is provided with a rounded top 8, to facilitate the placing of the rolls thereon. Said mandrel 4 is further provided with a diametric slot 9, in which are mounted gripper wheels 10, the peripheries of which are serrated so as to form the teeth 11. Said wheels 10, are rotatably mounted onY the bearing pins 12, which are fixed in the mandrel and the ends of which are rounded off so as to conform with the cylindrical surface of said mandrel. It is to be noted that the circular grippers 10 permit the core 18 to move longitudinally of the mandrel, but prevent rotary movement relative thereto.

On the top o, of the frame, are the vertical studs 13, on which is'fixed a spring cylindrical arm 14. See Fig. 3. A series of holes 15 are provided in the face of the top Z9, and are adapted to hold a stop pin 16, against which the spring arm 14 contacts, when the roll has been reduced to a predetermined size.

17 represents a roll of toilet-paper and 18 is a paste-board core upon which said roll is wound.

The operation of my machine is as follows: IVhen the machine is in its inactive state, the coil spring (j will hold all parts in the position shown in Figs. 1 and 2. It will thus be seen by having reference to Fig. 2 that the friction drive gear t will be out of engagement with the friction pinion lv, and

` the lnandrel 4 will thereupon be stationary.

The roll of toilet paper 17, is then placed upon the mandrel 4, being then thrust down over the circular gripper wheels 10, and the teeth of the latter will bite into the body of the core and hold it against rotation relative to said mandrel. The spring arm 14 is then placed around the roll 17'and the stop pin 16 adjusted toone of the holes l5, de-

pending on the size to which the roll is to be reduced. rI`he foot-pedal n, is then depressed so as to throw the friction drive gear t into engagement with the pinion o, thereby driving the mandrel in a rotary direction. The tension of the spring arm 14 will exert a frictional resistance which will hold the outside of said roll stationary and the rotating mandrel will wind the core 18 within the roll, thereby tightening the paper and reducing the roll to a smaller diameter. IVhen the reduction of the roll to the proper diameter has been reached, the spring arm 14 will contact with the stop pin 1G, the frictional resistance of said arm to the roll will be destroyed, and the roll will be held against further tightening. After the tightening process has been completed, the foot-pedal n, is allowed to resume its normal position, whereupon the machine will be replaced to its inactive state. The roll may be readily removed from the mandrel.

I claim:

1. In a device of the character described, the combination of a rotatable shaft adapted for receiving a hollow-core roll, such shaft formed with a recess, a vertical circular gripper-element journaled in such recess projecting beyond the periphery of the shaft, and being rotatable in a longitudinal plane of the latter, means for exerting a frictional hold on the exterior of the roll mounted on the shaft, and other means adapted to release such hold when the roll is reduced below a predetermined diameter.

2. In a device of the character described, the combination of a rotatable shaft adapted for receiving a hollow-core roll, such shaft formed with a recess, a vertical circular gripper-element journaled in such recess projecting beyond the periphery of the shaft, and being rotatable in a longitudinal plane of the latter, means for exerting a frictional hold on the exterior of the roll mounted on the shaft, and other adiustable means adapted to release such hold when the roll is reduced below a predetermined diameter.

3. In a device of the character described, the combination of a rotatable shaft adapted for receiving a hollow-core roll, such shaft formed with a recess, a vertical circular gripper-element journaled in such recess projecting beyond the periphery of the shaft, and being rotatable in the longitudinal plane of the latter, a resilient arm fastened at one end adjacent to the shaft. such arm adapted to encircle the roll mounted on the shaft, and to contract its diameter normally. and means for limiting said contraction of the resilient arm.

4. In a device of the character described, the combination of a rotatable shaft adapted for receiving a hollow-core roll, such shaft farmed with a recess, a vertical circular to contract its diameter normally, and adgripper-element journaled in such recess projustable means for limiting said contraction jecting beyond the periphery of the shaft, of the resilient arm.

and being rotatable in a longitudinal plane JAMES DVALL. 5 of the latter, a resilient arm fastened at one Witnesses:

end adjacent to the shaft, such arm adapted WVM. C. SCHMITT,

to encircle the roll mounted on the Shaft, and D. E. CRABB.

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