US2367777A - Winder - Google Patents

Description

Jan. 23, 1945.

| HORNBOSTEL 7 2,367,777

WINDER Filed Aug. 22, 1942 2 Sheets-Sheet 1 3 3 5r. 3 H N 2 7 v. 5 N7 4 3/.

M. B fi M 8 3 x L 4 f z j K t Jan. 23, 1945. L. HORNBOSTEL WINDER Filed Aug. 22, 1942 2 Sheets-Sheet 2 zfiz/Erz a? 14.010 Hams/905727..

P'atented .Fan. 23; 1945 wmnsn Lloyd Hornbostel, Belolt, Wis, assignor to Beloit Iron Works, Beloit, Wis., a corporation of Wiscousin Application August 22, 1942, Serial No. 455,689

Cl. 24h-75) 7 Claims.

This invention relates to winding apparatus capable of maintaining a constant draw tension on the mamrial being wound,

More specifically this invention relates to web winding devices eliminating the heretofore necessery unwinding stand brakes while at the same time maintaining constant tension on the web fed to the winder.

The invention includes a method of maintaining constant tension on material being wound in the rolls.

While the invention will be hereinafter specifically described as embodied in paper rewinders it should be understood that the invention is not limited to such use but is applicable to the winding and unwinding of any. type of material.

in the manufacture of paper it is customary to wind the sheet issuing from the paper machine into a roll supported on a reel. When this roll reaches a predetermined diameter or weight the paper sheet is cut and the leading end ofthe cut sheet is transferred to another reel. The wound roll is then transferred to an unwinding stand equipped with a friction brake and the roll is then unwound by a rewinder. The rewinder can be equipped with edge trimmers, slitter blades, and the like for forming commercial paper rolls of the desired length and diameter. The braking power of the friction brake on the unwinding stand determined the'draw tension on the sheet being fed to the rewinder. However, as the rewinder was accelerated or decelerated it was necessary to vary the braking effect on the unwinding roll of paper in order to maintain a constant tension in the sheet going to the winder. This necessity for variation of the winder stand brake has always caused great difliculty and a great number of constant friction devices have bee attempted to overcome this dlfliculty.

In addition, as the unwinding roll of paper on the unwinding stand becomes smaller in diameter it was necessary to reduce the braking effect to prevent increase in tension in the sheet being fed horsepower minus whatever friction was involved to drive the rewinder.

In accordance with the present invention the unwinding stand brake is entirely eliminated together with the large power dissipation necessarily encountered in such a construction. The invention includes the actual-driving of the unwinding roll of paper from the same sourcethat drives the rewinding mechanism The arrangement is such that the speed of the unwinding roll is tied in with that of the rewinder by means of connecting belts. Speed reducing devices are used so that the unwinding roll will be driven at a slower speed than the winding mechanism for maintaining a constant draw tension on the sheet being fed to the winding mechanism. However, the-decreasing diameter. of the unwinding roll and the increasing diameter of the winding roll have no effect on this {draw tension since the linear speed imparted to the unwinding roll is directly controlled by the feed input speed of the winding mechanism.

As a result of eliminating the heretofore necessary unwinding stand brake, the large power dissipation heretofore encountered in the use of such brakes is entirely eliminated and to operate the same size of winder at the same speed heretofore requiring 300 horsepower now only requires .about 50 horsepower, or just enough to overcome the friction in the various parts.

This invention also eliminates open draws between the unwindlng roll and the roll or rolls being wound. According to this invention endless supporting bands, preferably composed of either wool or cotton, convey the web from the unwinding rolls to the winding mechanism. In

preferred forms of the invention these felts wrap under the-unwinding roll of paper and are caused to hug the unwinding roll as it reduces in diameter by means of I a weight or tension take-up device. The belts then carry the sheet from the unwinding roll to the winder mechanism. The

belts are driven by the winding mechanism at 'a speed somewhat slower than the feeding speed of thewinding mechanism so as to maintainthe desired constant, tension.

With the arrangements of this invention no adjustmentsduring operation are necessary to maintain the desired constant draw tension since the surface speed 01' the sheet fed from the unwinding roll is controlled by the winding mechanism and is independent of the diameters of either the unwinding rollor the rolls being wound.

Itis, then, an object of this invention to provide winding apparatus for maintaining a con i stant draw tension on the material being wound.

A further object of this invention is to provide a paper rewinder which eliminates the heretofore necessary friction brake on the unwinding stand supplying paper to,the rewinder.

A still further object of the invention is to tie in the surface speed of an unwinding roll of web material with that of a winder for the web material b means of interconnecting drive devices between the unwinding apparatus and the windin apparatus.

A specific object of this invention is to provide paper winding and unwinding apparatus eliminating an open draw for the paper therebetween while maintaining a constant draw tension on the paper.

A further object of the invention is to reduce the power requirements for winding apparatus.

Another object of the invention is to provide a method of winding rolls of material from other rolls without dissipation of force by heretofore required brake friction while at the same time maintaining a constant predetermined draw tension on the material being wound irrespective of the changing diameters of the winding and unwinding rolls.

Another specific object of the invention is to provide a paper winding and unwinding assembly wherein a pair of driven under drums wind rolls of paper in the nip therebetween received from an unwinding roll and wherein one of the under drums drives an endless belt hugging the under side'of the unwinding roll to convey the web from the unwinding roll to the under drum .at a predetermined tension.

Other and further objects of the invention will be apparent to those skilled in the art from the following detailed description of the annexed sheets of drawings which, by way of preferred examples only, illustrate two embodiments of the invention.

On the drawings:

Figure 1 is a side elevational, somewhat diagrammatic view of one form of winding apparatus acording to this invention.

Figure 2 is a top plan view of the apparatus shown in Figure 1.

Figure 3 is a view similar to Figure l but illustrating a modified embodiment of the invention.

Figure 4 is a top plan view of the modified apparatus shown in Figure 3.

As shown on the drawings:

In Figure 1 the reference numeral l9 designates generally end frames of the apparatus mounted on a base plate H which straddles an open space S in flooring F. A similar and frame and similar base plate are provided at the other end of the apparatus so that the structure extending between the end frames is disposed over an open space in the flooring and projects beneath the flooring.

The end frames such as ill have pedestal portions such as [a carrying bearing supports for an unwinder shaft [2 extending therebetween.

vThe end frames I0 also have pedestal portions such as lob carrying bearing supports for the axles l3 and H of winder drums l and 18 which are disposed between the end frames.

A paper roll R is carried on the unwinder shaft l2 between end frames such as l0 and may beof large enough diameter to extend below the level of the floor F, through the open space S.

Paper P from the roll R is unwound from the under side of the roll and is trained around the outside winder drum ll into the nip ll between the drums I5 and I8. A roll R1 is wound up on a winder shaft II which is rotated by the under drums l5 and It in the nip H. The paper P is thus wound up into a roll Rx by the under drama I! and 18 around the shaft l8. Slitters (not shown) can be incorporated in the winder mechanism to cut the roll R1 into a plurality of rolls if desired. In addition, trimmers (not shown) can be used to trim the deckle edges of the paper P as it is being wound into the roll R1.

The under drums l5 and I8 are driven by means of a motor M as shown in Figure 2. The motor M drives the shaft l9 carrying a pulley 20. A

pulley 2| is provided on the shaft H of the outside winder drum i8 and a belt 22 connects the pulleys 20 and 2|.

A tapered pulley 23 is also provided on the motor shaft It. A second and reversely tapered pulley 24 is provided on the shaft I3 of the under drum iii. A belt 25 connects the pulleys 23 and 24 so that too drum l5 can be rotated by the same motor as the drum lli but at a predetermined speed relation depending upon the setting of the belt 25 on the tapered pulleys 23 and 24. The drum [5 is usually operated at a slower speed than the drum l8 and this speed is controlled by shifting the belt 25 across its pulley.

In accordance with this invention a roller 28 is rotatably mounted under the under drum is as shown in Figure l and a second roller 27 is rotatably mounted in front of the roll R at a level above the unwinder shaft l2. An endless belt 28 composed of either wool or cotton is trained around the rollers 28 and 27 to underlap the roll R with its upper run. A roller 29 is disposed within the loop of the belt 28 and is weighted by means of weights such as 30 suspended from rods such as 3| carried by the axle 29a of the roller 29 for maintaining the felt in a taut condition.

As the roll R decreases in diameter during the unwinding operation, the weighted roller 29 will be lowered so that the upper run of the belt will always hug the under side of the roll R.

The roller 27 has a gear 32 on the shaft 33 thereof meshing with a second gear 34 on the same shaft 3'5 as a tapered pulley 36. The pulley 38 is driven by a belt 31 from a second tapered pulley 38 on the shaft ll of the outside underdrum i6.

The belt 31 is adjusted on the pulleys 36 and r 38 so as to drive the belt 28 at a somewhat slower surface speed than the speed of the underdrum i6. The gears 32 and 34 cause rotation of the roller 21 for driving the upper run of the belt 28 toward the under-drum IS.

The paper P from the unwinding roll R is thus supported on the upper run of the belt 28 and is carried at a slower speed than the speed of the under-drum ii to the under-drum. As a result of this speed differential, the paper will be maintained under tension,

Even though the unwinding roll R decreases materially in diameter during the unwinding operation, the weighted roller 29 will still continue to hug the unwinding roll and the surface speed of the paper will remain unchanged. Therefore the paper P being fed to the mechanism is readily maintained under a constant draw tension determined by the setting of the belt S'lon its pulleys, and the changing diameters of the roll R being unwound and the roll R1 being wound will have no affect upon the draw tension. The winding mechanism may be speeded up or slowed zontalali unwound in spaced relation from said unden- Since a friction brake is not necessary on the roll R the apparatus can be operated with only a fraction 01 the horsepower heretofore required.

In the embodiment shown in Figures 3 and a parts substantially identical with parts described in Figures 1 and 2 have been marked with the same reference numerals.

As shown in Futures 3 and d the inner winder drum iii receives the paper P therearoundand is driven directly from the motor and through the belt and pulley connection 22, it, and 25. The outside winder-drum it is driven by the motor through the tapered pulleys 28 and 2d and interwithout in way ailecting the draw tenconnecting belt 25 at a speed preferably somewhat slower than the speed of the inner drum In this manner, therefore, the driving of the under-d and it is reversed from that shown in Figures Ii and Z.

The roller 28, instead of being positioned under the drum 6 is positioned in front of the drum it and the belt 28 trained between the rollers 2&3 and 2'] is divided into a plurality of strips such as 28A, 25B and 2&0 as shown in figure ii.

The weighted roller 22%? is within the loop of all oi the strips. 28A to 28C and causes these strips to hug the roll R.

The strips 28A to 280 are driven by the roller it in a direction to unwind the roll R and for feeding the paper F to the under-drum is. The belt ill is adjusted on the pulleys it and it to drive the roller 2? for imparting to the strips 28A to 215C to linear speed which is somewhat slower than the speed of the winder drum it. In this -manner a constant draw tension is maintained on the paper P being fed to the winding mechanism,

and this tension will remain the same irrespective oi the varying diameters of the unwinding roll and the winding roll R1.

Both forms of the inventions shown in Figures i and 2B and in Figures 3 and 4 eliminate any open draws of paper between the unwinding and winding rolls. In all forms of the invention, slitting devices, trers. and the like, can be used in conjunction v th the winding mechanism for trinunhrig the edges of the roll being wound as well as for cutting the roll being wound into several independent rolls of the desired length.

The winding mechanism, since it drives the unwinding mechanism, can be accelerated and deceierated at will without interfering with the draw tension on the paper being led to the winding mechanism It will, or course, be understood that various details of construction may be varied through a wide range without departing from the principles of this invention and it is, therefore, not the purpose to limit the patent, granted hereon otherwise than necessitated by the scope of the appended claims.

- I claim as my invention:

i, Rewinder apparatus comprising a pair oi spaced adjacent under-drums in substantial hori cut, a roll support for a roll to be s, a roller rotatably mounted adjacent said roll. support, a second roller rotatably mounted adjacent one oi said under-drums, an endless belt trained between said rollers, belt tensioning means acting on said belt to causethe belt to hub a roll mounted on said roll support and exert a constant predetermined degree of frictional force on the roll irrespective of the changing size and weight oi the roll as it unwinds, means for driving said one under-drum, and a driving connection between said means and the roller adjacent the roll support for driving the belt to unwind a roll on the roll support and carry unwinding material to said one under-drum, whereby said one under-drum can receive the material therearound and cooperate with the other under drum for winding the material into a. roll in the nip between the drums.

2. Rewinding apparatus comprising a pair of spaced horizontal under-drums, roll support means in spaced relation from said under-drums, aroller on one side of said roll support means adjacent an under-drum, a second roller on the other side of said roll support means at a level above the roll support means. an endless belt trained between said rollers adapted to hug a roll oi material being unwound, means for driving the under-drum adjacent to the first mentioned roller, a tapered pulley driven by said under-drum adjacent the first mentioned roller, a second tapered pulley adjacent the roller on the other side oi the roll support means, gears driven by said second tapered pulley to drive the belt in a direction for unwinding a roll on said support means and for conveying the unwound material to the winder drum adjacent the roller, and a belt connecting said tapered pulleys for corotation whereby said belt is adaptably shifted on said pulleys to vary the speed of the belt.

3. Rewinding apparatus comprising a pair of under winder drums, a roller in spaced relation from said under-drums, roll unwinding support mechanism between said roller and said underdrums, a second roller under the under-drum positioned most remote from the first roller, an endless belt trained between said roIIera'tension means acting on said belt to cause the same to hug a roll on the support mechanism and exert speed, and means driven by the means for driving the under-drum adjacent said second roller for driving said first roller at a slower speed than the under-drum in a direction to unwind a roll on the support mechanism for guiding material being unwound to the under-drum adjacent the second roller. a H

Paper rewinder apparatus comprising outside and inside horizontally aligned under-drums, a first roller under the outside under-drum, a second roller in spaced relation from the first roller, an endless belt trained between said rollers, support means for a roll of paper to be unwound between the first and second rollers, means cooperating with said belt to cause the some to hug a roll on the support means, means for driving the outside winder drum, means for driving the inside winder drum at a slower speed, and means driven by theoutside winder drum for driving the second roller in a direction to drive the belt for unwinding the roll between the first and second rollers and for guiding material from the unwinding roll to the first under-drum. 5. Paper rewinder apparatus comprising outside and inside under-drums, a first roller adjacent the inside under-drum, a second roller in spaced relation from the first roller, paper roll support means between the first and second rollare, a plurality of endless strips trained between the first and second rollers, tension means within the loops of theendless strips to cause the strips to hug the roll of paper on the support means, means for driving the inside under-drum, means for driving the outside under-drumat a slower speed, means driven by the inside under-drum for driving said second roller in a direction to drive the endless strips for unwinding the roll of paper on the support means and for supporting the unwound paper to guide the same to the inside winder drum.

6. A winder device comprising winding mechanism for winding material intorolls, a roll support for a roll of material to be unwound, said r011 support being spaced from said winding mechanism, an endless traveling band trained to lap the roll being unwound and convey material from the lapped roll to the winding mechanism, band tensioning means acting on said band to cause the band to hug the roll being unwound and exert the same force on the roll irrespective of the size or weight of the roll, means for driving the winder mechanism, a driving connection from said means drivingly connected to said band, and means in said driving connection for causing the band to unwind the roll on the same to hug a roll on said reel and exert a constant predetermined degree of frictional force on the roll being unwound irrespective of the changing size and weight of the roll as it unwinds, means for driving the drum, and a driving connection between said means and the secand roller adJacent said reel for driving the belt to unwind a roll on the reel and convey unwinding material from the unwinding roll to slower surface speed than the speed of said drum to supply material to be wound to said drum under a constant tension.

LLOYD HORNBOBm

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