US2206580A - Winding apparatus - Google Patents

Description

july 2 A. PQTDEVHN Er An. 29595 WINDING APPARATUS Filed May 27, 1938 2 Shees-Sheet l ATTORNEY maas@ A, PQTDEVIN El' AL WINDING APPARATUS Filed May 2'7, 1938 2 Sheets-Sheet 2 INVENTORS @www/#5MM uNrrlzp*f-serai"esA 'PATENT OFFICE Machine Company, Brooklyn, N. Y., a. corporation of New AYork Application May zi, 193s, seriamo. 210,312 -3 claims.' (121.242.455) Y This Yinvention is directed to an improvement come by the introduction of anl equalizlng but; `in winding apparatus and has for one of its ob' non-slipping differential gearing. jects thel provision of an apparatus for drawing It is Vassumed that the shafts upon wniohthe material from a supply roll and rewinding the rolls are to be wound are of the same, or nearly same into'separate rolls on separate shafts, The the same, diameter; and as the rewind shafts of .5 p Y improved apparatus is. particularly well adapted the present invention are differentially geared for use in connection with the rewinding of together the pull on each web or each lead of the printed paper and slip sheet paper, although it same web of material ispractically the same. is adapted also for rewinding paper which is If the material Wound onto the diierent shafts drawn from a supply roll, slitted and then reis 0f the Same thickness, n0 further adjustl0 wound into two separate rolls. ment is required. 'I'he roll, or rolls, on each Slip sheet'paper as used in printing today is shaft will increase equally in diameter and will usually a waxed paper and more recently a new be of the same hardness, the'hardness desired betype of slip sheet paper has been deve1oped which `ing obtained by the regulation of the tensioningl Y 1l is not only waxed but creped as well. With plain or' braking device on the parent or supply roll. 15

` waxed slip sheet paper it is obvious that care 0n the other hand, if the supply roll consists must be exercised that the slip sheet be wound 0f @W0 Webs 0f Paper 0f different thickness, Wound under the proper tension inasmuch as otherwise onto one roll which. is to be separated-into two it will slide upon itself or telescope, 0n the independent rolls, each wound onto its'own shaft,l

other hand, with the waxed crepe paper it; is the differential gearing which equalizes the ten- 20 evident that not only must precautions be taken sion on both rolls begins the winding of each roll in this same direction but care must be exon each shaft with the same hardness; but, as ercised that too much tension is not applied to the material is of unequal thickness, the roll with the slip sheet paper inasmuch as this will take the thicker material increases faster in diameter the orepe ont of the paper, than the roll with the thinner material, produc- 25 In rewinding printing rolls it is usually desir.. ing an unbalanced condition of leverage whichv able to obtain as large a, rewound m11 as can be the differential gearing alone is not able to overhandled, since, obviously, small rolls require more c0m@- stoppage of the machine upon which tney are In order to eliminate this diiiculty a, double ultimately used. Bearing this in mind, it is braking device is incorporated in this invention, 30 desirable, and it is made possible by the present one on each rewind shaft. Itis self-evident that invention, to be able to splice the printed Sheet with a differential alone the surface speed of the of a second supply roll to the roll which is altwo 0r more rolls being wound remains the same; ready in the machine and continue to wind the but the hardness of the rolls on the two shafts printed paper from the Second supply rou onto will vary due to the increase of diameter or le- 35 a single lprinted roll, and at the same time start Verage- The r011s With the thin material will rewinding a new slip sheet roll from the second become harder. and the rolls With the thicker Snppiy ro11 material, which becomes larger in diameter, will In conventional machines of the prior art the beCOmes relatively softer.

o rewind shafts are generauy driven by a friction By applying the broke on the Shaft with the 4o device, such as friction clutches or slip belts. Smaller diameter 1011, the larger diameter rolls In. order to produce rewound rolls of a desired may be made 0f the same hardness as the small hardness on each rewind shaft, the friction derolls, or even harder, if desired; or vice versa. vices on the respective rewind shafts must be In the accompanying drawings:

very carefully and continuously manipulated by Fig- 1 iS a Side eleVatiOnal "idw` 0f 0111 improved 45 the operator. Anyone with experience in the apparatus;

handling of this kind of apparatus will appreciate Fig- 2 iS a Plan View 0f the same; and the diculties of this procedure. With such fric- Fig. 3 is a diagrammatic View of a modified tion driven apparatus, difficulties are encountered embodiment of our invention.

5o from the first starting of the rewinding, inas- Referring to the drawings in detail and with 5o much as unless the frictions on the rewlnding reference rst of all t0 the rewinding into separshafts are absolutely equally adjusted the rolls ate rolls of a printed web and a slip sheet web on one shaft are harder from the very beginning taken from a composite roll where the printed than the roll, or rolls, on the other shaft. web and slip sheet have been wound together:

.In the present invention this trouble ls over- 2 designates the side frames of the apparatus 55 supporting a driving motor 4, the armature shaft 6 of which carries a sprocket l for a sprocket chain |0. The chain Il passes over a sprocket I2 mounted on the driven shaft I4 of a differential. The differential comprises enclosing housing I6, bevel gear Il on the inner end of the shaft I4, crown gear meshing with the gear I0, bevel pinions 22 carried by the crown gear 20 and crown gears 24 and 26 meshing with the pinions 22.

The bevel gear 26 is fast on a driving shaft 26 extending transversely of the machine and the bevel gear 24 is fast upon the other driving shaft 30 of the differential.

The shafts 26 and 30 are provided with brake drums 32 and 34, respectively, each drum being equipped with a conventional hydraulic brake. The brake for the drum 34 is actuated by a duid supplied thereto through a conduit 36, pressure on the fluid being varied by member 36. The brake for the drum 32 is actuated by fluid supplied through conduit 40, pressure on the fluid being varied by member 42.

The drum 34 carries a sprocket 44 for sprocket chain 46. This chain passes over a sprocket 46 mounted on a stub shaft 50 carrying a gear 62 meshing with a gear 64 which in turn meshes with a gear 56 rigidly mounted upon the rewinding shaft 56. 'I'he printed web 62 is drawn or unwound from the supply roll 64 and rewound into a roll on the rewind shaft 63.

The drum 32 is provided with a sprocket 66 for sprocket chain 63. 'This chain passes over a sprocket 10 mounted on a shaft 12 which also carries a gear 14 meshing with gear I6 in turn in mesh with gear 13 rigidly mounted on the re- 'winding shaft 60 upon which slip sheet web 64 which is drawn or unwound from the supply roll 64 is to be wound into a roll 32.

It will be understood that the supply roll 64 is a composite roll made up of the. printed web 62 and the slip sheet web 84 rolled up together as they come from the printing press.

'I'he printed web 62 as it passes from the roll 64 is led about rollers 63 and 60 carried by an adjustable bracket 36. The slip sheet web 84 as it passes from the roll 64 is led about rollers 96 and 96 mounted on adjustably mounted bracket 94.

The supply roll 64 is mounted on a shaft |02 carrying a pinion |04 meshing with a gear |06 on a stub shaft |06. This stub shaft carries a brake drum equipped with brake shoes ||2. I'he adjustment of this brake is effected through shaft ||4 equipped at its outer end with a. hand wheel ||6. The shafts 66, 80 and |02 are all mounted in open bearings in the frame 2, as will be seen from Fig. 1, so as to facilitate placement and removal.

It will be understood from all of the foregoing that in operation, after threading the machine, the brake shoes ||2 are adjusted to apply the desired friction to the drum to provide the proper combined tension on the materials being rewound. The motor 4 is then started to drive the printed web rewind shaft 58 and the slip sheet shaft 60 through the differential and chain and gear drive above described.

It will be appreciated that although the slip sheet and printed web may be of different thicknesses the differential will automatically com-- pensate for the same to effect rotation of the rewind rolls 60 and 62 at the same peripheral speed. As above pointed out, the tensions on the webs 62 and 84 are relatively adjustable. This adjustment is effected by manipulation or adjustment of the brakes on the drums 32 and 34. This adjustment, that is to say, relative adjustment of the tension on the webs 62 and 64 permits the printed web 62, for instance, to be wound under greater tension than the slip sheet 64 which is of advantage particularly when dealing with crepe paper slip sheets inasmuch as it permits the printed web to be rewound into a tight roll, which is desirable, while at the same time the tension on the slip sheet paper will be low enough to insure retention of the crepe in the paper. 'I'his ability to adjust the tension on the two webs is of further advantage where, when the supply roll 64 is nearly exhausted, it is desired to splice the printed web from a new roll to the printed web of the nearly exhausted roll so as to make the rewind roll 60 of as large diameteras conveniently can be handled and where at the same time a new rewind roll of slip sheet paper is Started. l,

It is understood, of course, that the adjustment of the brake on the supply roll shaft will vary the total tension on the webs passing to the rewind shafts without, however, any substantial variation in the relative tension on these materials; and that relative adjustment of the differential brakes will effect variation in the relative tensions on the webs being rewound without varying the total tension.

This ability to adjust the relative tension between two webs being rewound is also of advantage where instead of employing a composite roll the printed web is to be slitted lengthwise and the two widths thus produced rewound on separate rolls. In such a case one rewind roll may be of a much greater width than the other and it is necessary to rewind the two rolls under different tensions. In this connection, we refer to the embodiment of our invention as illustrated in Fig. 3. It will be seen from this gure that the printed web passes over guide roll '|30 between slitting rollers |36 and |38, one portion of the slit web passing over roller |40 to be rewound at |42, the other width passing under roller |44 to be rewound at |46.

It will be understood that various changes may be made in the details of construction and arrangement of parts as herein illustrated and described within the purview of our invention.

This application is a continuation in part of our copending application Serial No. 155,408, filed July 24, 1937.

What we claim is:

1. Rewinding apparatus for a supply roll of superimposed webs lof material comprising in combination a supply roll shaft, a plurality of rewind shafts, a differential for driving said rewind shafts to draw webs from the supply roll shaft and rewind them upon said rewind shafts, and brakes for the driving shafts of the differential individually adjustable, thereby individually to adjust the tensions on the webs passing to the rewind shafts.

2. Rewinding apparatus for a supply roll of superimposed webs of material comprising in combination a supply roll shaft, a plurality of rewind shaft's, a differential for driving said shafts to draw webs from the supply roll shaft and rewind them upon said rewind shafts, a brake for each of the driving shafts of the differential, said brakes being adjustable independently of each other to effect an adjustment in the relative tensions on the webs passing to the rewind shafts, and an adjustable brake for the supply a,aoo,sso i 'Y 3 roll shaft governing the total tension applied to the rewind shafts from the supply shaft, and an. the webs being rewound. adjustable brake for the supply roll shaft for 3. Rewinding apparatus for a supply roll of effecting variation in the total tension applied superimposed webs of material comprising in to the webs being rewound, the total tension on 5 combination a supply roll shaft, a plurality of the webs being rewound being unaffected by ad- -5 rewind shafts, a differential for driving said rejustment of the first mentioned brakes, andthe wind shafts to draw webs from the supply roll relative tension on the webs being rewound beshaft and rewind them upon said rewind shafts. ing substantially unaffected by adjustment of the a brake for each of the driving shafts of the) lastmentioned brake.

10 differential, said brakes being adjustable indel0` pendently of each other to effect an adjustment ADOLPI-I POTDEVIN. in the relative tensions onthe webs passing to ROBERT L. RICHMOND.

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