US2387644A - Rewinding mechanism - Google Patents

Description

E. w; coFFEY 2,382,644

REWINDING MECHANISM Fiied Aug. 23,1944 v 2 sheets-sheet 1 Oct; 23, 1945.

Oct. 23, `1945'.

-E. W, COF FEY REWINDING MECHANSM 2 Sheets-Sheet 2 A Filed Aug. 23, 1944 Patented Oct. 23, 1945 REWINDING MECHANISM Elmer W. Coffey, La Grange, Ill., assignor to H. P.

Smith Paper Company, Chicago, Ill., a corporation of Illinois Application August 23, 1944, Serial No. 550,705

9 Claims. (Cl. 242-66) `This invention relates to rewinding 'or roll "forming mechanism for paper, cloth, or similar strip or web-like material.

Paper in roll form frequently is rewound for inspection purposes and sometimes must be re- Wound prior to use in packaging printing or other machines to provide rolls that are wound with uniform tension and uniform edge surfaces. The machine shown in the accompanying drawings and hereinafter described is for use in such rewinding operations, and is particularly adapted for rewinding rolls of paper of relatively narrow width as distinguished from wide rolls used in newspaper Work for example.

One object of the present invention is to provide a rewinding machine on Which paper or like frolls can be positioned readily in rewinding posii An additional object of the invention is to provide mechanism that effects a uniform linear rate `of'travel of the stock during the rewinding operation and uniform driving engagement of driving means with the rewinding roll to eifect uniform- ,ity of tension on successive convolutions of stock during the winding operation.

Other objects of the invention relate to various features of construction and arrangement of parts that will be apparent from a consideration of the following specification and accompanying drawings wherein:

Fig. 1 is a broken top plan view of a rewinding machine that is illustrative of the present invention;

Fig. 2 is a sectional view of the machine taken substantially on line 2-2 of Fig. 1;

Fig. 3 is an enlarged fragmentary top plan View, partly in section, illustrating the relation of the driving rolls to the wind-up roll and the path of travel of the paper strip to andabout the latter;

Fig. 4 is a broken sectional view taken on line 4 4 of Fig. 3.

l In the drawings a rewinding machine is shown frame members II and I2 and side frame members I3 and I4 which are illustrated as being of angle form. As shown in Figs. 1 and 2, table top I5 is shown supported by the end frame mem.- bers |I and I2 and side members I3 and I4. Within a recess provided in the table top I5 is a bearing support I6 for a vertical bearing I1, preferably provided with roller bearings (not shown) which rotatably support a vertical spindle I8 that projects above the upper surface of the table I5. To the spindle I8 is secured a disc I9, shown suitably spaced above the upper surface of the table I5 for supporting a roll of stock, such as a roll of paper 2|] that is to be rewound.

A vertical wind-up spindle 2| is provided adjacent the opposite end of the table. The spindle 2| is journaled in a bearing member 22 which is mounted in a slidable support 23, the opposite side edges of which are arranged to slide in simi.. lar tracks or guide-ways 24 positioned adjacent the longitudinal edges of an aperture 25 provided in the table top. The tracks 24 are supported by transverse members 26 secured by any suitable means, as by welding, to the side frame members I3 and I4- The spindle 2| is Lprovided with a horizontal disc 2'! disposed in the horizontal plane of the disc I9, as shown in Fig. 2, for supporting the rewound rolls as thesame are formed during the operation of the machine.

Means for driving the wind-up spindle 2| preferably comprises a pair of depending driving rolls 28 and 29 mounted on drive shafts 30, 3| respectively, which are similarly journaled in an overhead bearing support 32, as indicated in Fig. 2. The support 32 is attached, to a bracket or frame 33 which is supported at a proper elevation above the table top I5 by any suitable means, such as legs 34 and 35 which may be attached to end frame member I2 and a cross member attached to side frame members I3 and I4.

Secured to the bracket 33 is shown an electrical motor 36 having a belt pulley 31 for driving, by means of a belt 38, pulleys 39 and 4D provided on the upper ends of the shafts 3U, and 3|. Rotation of the motor effects uniform rotation of the rolls 28 and 29 clockwise, as viewed in Fig. 1. The rolls 28 and 29 normally have surface engagement with the stock on the wound-up spindle 2| for effecting rotation thereof.

The spindle 2| being mounted in the slide 23 and hence movable to the right, as viewed in Fig. l, as the `roll on the spindle increases in diamcomprising a support provided with legs I0, end 65 eter. iS biased against Such mOVemen bly any suitable means for maintaining the roll being formed in uniform driven contact with the driving rolls 28, 29. In the drawings the biasing means are shown as comprising a cable 4| attached to the slide 23 and passing over a pulley 42 and provided with a counter-weight 153 beneath the table top. The counter-weight maintains the roll being formed on the spindle 2| in uniform .frictijonal "driven engagement "With the driving ir'olls.

For the purposes of putting a core onto spindle 2|, threading the machine or to remove a wound roll from spindle 2| the slide member y23 `.can be moved to the right, or forwardly asvi'ewed in Fig. 1. For such purposes, aslever ll'llislsh'own loosely pivoted at 45 to thelowerrsurfacetof 'frame member I3 and extending transversely of the table and supported also adjacent the free end by a bracket 46 attached to the "frame member I4. As will be apparent, the lever showninlFi'gs. 1 and 2 is operable manually for shifting the slide 23 forwardly whendesired. .A link 41 'connects the ylever tothe forward fend of the slide asshown for moving the latter 'as the'lever 'isfswung to the right. The bracket "46 yis provided with a 'notch '48, as shown in Figs. 1 and'Z for receiving the lever "34 when moved to the dotted linetposi- 'ation of Fig. `1, for :retaining the slide `23.in'a forward .position against the biasing :action ofthe Weight '43. v

Brake or drag means preferably .are .provided "for preventing overrunning of the roll y'Ztl and .thereby producing slack inthe web of stock and 'loss o'f propertension in the outer convolutionk of the roll of stock beingformed on spindle`2 l.. The brakemeans shown comprises a lever 49 pivoted at 50 to the vside frame i3 and .projecting tangentially-of the ro'll'ZB. Apad'5l, which may be 'of brake lining or-other suitable friction material,

is secured to the .lever and bears against the upper .peripheral portionofthe roll while permitting the llowerperipheral,portionto be unconnedto resultin greaterpressure and resistance to unwinding at the top yof theroll and to thereby exert a downward component on the unwinding roll 2l). To provide uniform braking effect in the .roll'2|l, .the lever `is biased clockwise, as viewed in Fig. 1, 'by a counter-weight 52 suspended by a cable 53 which .passes over a pulley l54 and'is secured 4to 'the lever, as illustrated. The point of attach- `ment ofthe cable Ato the lever is selected toprovide the braking eiect required to avoid .unwinding of the roll `2li by overrunning when the rewinding operation is interrupted and to provide the desired tension `on the paper web during .the

operation -of the .machine In vuse, .the roll 20l to be .rewound is Vplaced on 'the spindle I8 .and the web of stock is passed around a vertically adjustable angedfixed guide spool 55, thence passed clockwise about the -roll 29 -and counterclockwise about a spool or core 56 on the wind-up .spindle 2|.. Therelation of . driverolls 28,29, to the wind-up spindle 2| is such that both drive rolls bear .upon the periphery of the-spool, or paper thereon, .forrotating the same. The roll 2.8 preferablyis .covered with rubber 28a -or other suitablefrictional material while roll 29 maybe of polished steel. .The drive rolls 28, 29 areshown as of the same diameter since both are Apositively driven by the belt -38 and tend to impartlike peripheral velocity to the wind-up roll -onthe spindle 2|. Y

While the action of vdriving roll 29 upon the wind-up roll .is such as to tend to loosen the outer convolution of .the paperstock thereon, the

convolution is retained against slippage by contact through a substantial arc with the subjacent convolution and by the frictional engagement of the web with the roll 28 as shown in Fig. 3. In said figure the .paper stock contacts the roll 29 through approximately 180 of arc, the large area affording sufficient frctional engagement to resist slippage of the outer convolution of the windup roll *by the f'drivingfactionf rit-,lie drive rolls Aand insures theproductionfof ltightly wound rolls on the wind-up spindle. The guide spool 55 is so located with respect to roll 29 as to provide such relativelylarge area of surface contact of the 'webvviththe peripheral surface of the roll 29 to rafford'thefrictionalcontact required. More parlticularly T'thelanged spool 55 guides the paper web intits'pathto wind up spindle 2| and aids in vertical alignment of the edges of the paper web,

the spoolbeing mounted for vertical adjustment byihavin'g the shaft thereof threaded in the table top l5.

fAs a wind-up roll increases 'in Jdiameter, uthe spindle 2| advances to .the right, as .viewedlin .rals in the convolutions in .the-rolls`beingformed.

However, merely the weight-of .the web, .under all conditions, is not suicient .to maintain `the lower edge of the web uniformly in guided contact .with

the upper surface Vof the disc '-2.1 and vhence Athe drive vrolls 28 .and "29 are rpreferably inclined slightly tothe right, that.fis, they fare, in effect, rotated 'from a vertical position clockwise von a `horizontal, transverse axis Ya -slight extentas viewed in Fig. 2. (Fig. 2 shows the center -line of vdrive roll 29, for the ypurpose of `illustration,

at an exaggerated inclination.) `IIowever,.inthe end view the 1axis of both .the rolls Y28 4andi-9 .lie in vertical longitudinal planes. 'I'heslight -canting or tilting Aof the drive rolls v2:3.-ar1d-29, las-described, causes them to exert asligh-tly downward component on each outer convolutionfas thesame is wound upon the spindle, vand thereby tends to maintain 'the llower edges .of successive vconvolutions in uniform relation with respect to .the aupper surface of the disc21. Such lcanting .or tilting of tlieaxes of therollsalso 4resists theupward spiralling of the convolutions. Hence -the arrangement retains thelower edge of web "ofstock in aligned' contact with the supporting surface of the disc '21, ythereby forming trolls with smooth or uniform edge surfaces.

The driving engagementof -the.rolls .f2.8 and 2-9 with the roll of stock upon the `spool -or spindle provides a .uniform .rate fof linear .movement of the web `from the spindle .-|8, or1other-convenient supporting means, to the wind-up spindle 2| which .facilitates inspection `of Athe stock' dur-ing rewinding operations -and by making feasible the application of uniform tensionon the web insures uniformity of tightness between 4successive con volutions of the formed rolls. l

I claim vas my invention:

'1. A machine for winding stock in upona spoolcomprising a vertical spindlefor :the spool, a pair of driving rolls arranged -tocontact peripherally and rotate vthe-stock upon the spool, meanssupporting the spindle for movement :away

web form from said driving rolls as the diameter of the rolled stock on the spool increases, and biasing means for said supporting means for retaining the roll of stock in uniform peripheral driven contact with said driving rolls.

2. A machine for Winding stock in web form upon a spool comprising a vertical spindle for the spool, a pair of driving rolls arranged to contact peripherally and rotate the spooled stock upon the spindle, means supporting the spindle for movement away from the driving rolls as the rolled stock on the spool increases in diameter, biasing means for said supporting means for retaining the roll of stock in uniform peripheral driven contact with said driving rolls, and means for maintaining uniform tension on the web of stock during the winding operation.

3. A machine for winding stock in web form upon a spool comprising a vertical spindle for the spool, a pair of driving rolls arranged to contact peripherally and rotate the spooled stock, means for operating saitl driving rolls, slidable means supporting the spindle for movement away from the driving rolls with increase in diameter of the roll of stock on the spindle, means biasing said slidable means against such movement for holding the rolled stock in uniform peripheral contact with said driving rolls, and manually operable means for moving said slidable means in opposition to said biasing means and out of contact with said driving rolls.

4. Rewinding mechanism for stock in webform comprising a spindle for rotatably supporting a roll of stock to be rewound, a second spindle arranged vertically and provided with a horizontal disc for supporting the stock as the same is rewound thereupon, and a pair of driving rolls arranged peripherally to Contact the rolled stock on said wound spindle for rotating the same during the rewinding operation, the axis of said driving rolls being arranged ina .position inclined from the Vertical to provide a downward component on succeeding surface convolutions of the rewound stock for aligning the lower edge of the p same with the upper surface of said disc.

5. Mechanism for winding web-form stock into rolls comprising a vertical spindle around which the stock is to be wound in roll form, a pair of driving rolls arranged for peripheral frictional contact with the stock on said spindle for rotating the same during the winding operation, said driving rolls being disposed at an angle for effecting a downward component on successive outer convolutions of the stock on the spindle for inhibiting the formation of ascending web spirals in the wound-up roll, and means accommodating relative movement of said spindle relative to said driving rolls as the diameter of the roll of stock increases.

6. Mechanism for winding web-form stock into rolls comprising means for supporting stock to be wound, a vertical spindle around which the stock is to be wound, driving rolls arranged for peripheral contact with the successive outer convolutions of stock on the spindle for rotating the same, said driving rolls being arranged at an angle to exert a downward component on each successive outer convolution for inhibiting the formation of an ascending spiral of the web as the same is wound into' roll form, and a horizontal disc for supporting the roll on the spindle and eiecting horizontal alignment of the lower edges of successive convolutions as the same are wound upon the spindle.

7. Mechanism for winding web-form stock into rolls comprising a vertical spindle around which the stock is to be wound, and a pair of driving rolls arranged for peripheral contact with successive outer convolutions of stock upon the spindle for rotating the same during the winding operations, said driving rolls being disposed at an angle for eiecting a downward component on successive outer convolutions of the stock on the spindle for inhibiting the formation of ascending web spirals in the wound-up roll, one of `said rolls being positioned for contacting a portion of the unwound web frictionally for resisting peripheral slippage of successive outer convolutions of the wound-up stock by the driving force exerted thereon by said driving rolls.

8. Mechanism for winding web-form stock into rolls comprising 'a vertical wind-up spindle for a roll to be formed, a horizontal disc carried by said spindle for supporting a roll formed upon the spindle, means for guiding a vertically disposed web of stock to the spindle with the lower edge of the stock in substantial alignment with the upper edge of said disc, a substantially horizontal support disposed at an elevation above said disc, a pair of driving rolls journaled in said support and depending therefrom above said disc into peripheral driving contact with the cylindrical surface of the stockon said spindle for rotating the same, means mounting said spindle for horizontal-sliding movement in a direction for 40 retaining the roll of stock thereon in driven conoperation, and means biasing said mounting means in the opposite direction for retaining the roll in uniform driven contact with said driving rolls.

9. Rewinding mechanism for stock in web-form comprising a spindle for rotatably supporting a roll of stock to be rewound, a second spindle arranged vertically and provided with a horizontal disc for supporting the stock as the same is rewound thereupon, and a; pair of driving rolls arranged peripherally to contact the rolled stock on said wound spindle for rotating the same during the rewinding operation, the axis of said driving rolls being arranged in a position inclined from the vertical to provide a downward component on succeeding surface convolutions of the rewound stock for aligning the lower edge of the same with the upper surface of said disc, surface brake means for exerting a downward component against the roll to be rewound, and vertically adjustable guide means interposed between said spindles for guiding the web in its path to the rewinding spindle.

ELMER W. COFFEY.

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