US2599942A - Paper winding machine - Google Patents

Description

June 10, 1952 G. RQEN PAPER WINDING MACHINE 5 Sheets-Sheet 1 Filed March '17, 1947 INVENTOR GUNNAR ROEN ATTORNEYS G. ROEN PAPER WINDING MACHINE June 10, 1952 5 Sheets-Sheet 2 Filed March 17, 1947 INVENTOR ROEN GUNNAR f 7% v ATTORNEYS.

June 10, 1952 Filed March 17, 1947 G. ROEN PAPER WINDING MACHINE 5 Sheets-Sheet 3 INVENTOR GUNNAR ROEN 'Zizywfziz w ATTORNEYS.

G. ROEN PAPER WINDING MACHINE June 10, 1952 5 Sheets-Sheet 4 Filed March 17, 1947 ATTORNEYS.

June 10, 1952 ROEN 2,599,942

PAPER WINDING MACHINE Filed March 17, 1947 5 Sheets-Sheet 5 I YEW TOR GUNNAR Ron! ATTORNEYS Patented June 10, 1952 OFF-ICE PAPER WINDING MACHINE Gunnar Roen, Vikeland, near Kristiansand, Norway Application March 17, 1947, Serial No. 735,065

In Norway March 23; 1.946

The present invention relates to improvements in machines for rewinding of paper sheets.

small rolls, such as for example counter rolls, rolls of toilet paper, tapestry, cash register strips, adhesive strips etc. These small rolls are produced in special smaller roll winding machines, which are usually referred to as counter roll machines, rewinding machines, winding machines, reeling machines, small-roll machines etc. Common to all these types of machines is that they are designed for producing smaller paper rolls by rolling or winding or reeling a certain amount of paper onto a rotating spindlefrom a larger roll .usually referred to as a supply roll, often accompanied by a simultaneous division of the paper sheet in the longitudinal direction, so that the supply roll is divided into a number of smaller rolls, which may therefore have the same width or a smaller width than the supply roll and a smaller paper length (meters per roll) or diameter than the supply roll; I, The features of the present invention are applicable to all the above mentioned types of machines, and although in the present specification and claims the machine according to the invention is shortly referred to as a rewinding machine, this expression is to be read in a broad sense, so

12 Claims. (Cl. 24256) ng machine according to the invention. 'How- ;-ever, the embodiment shown and described is to Paper is used at a. large scale in the form of be regarded merely as an example, and not to be construed as limiting the conception of the inas to comprise machines for any of the above simple construction and yet reliable in operation since it has a high production capacity, undue delays in the operation of the machine are minimized.

A further object is to provide an automatic machine of the class described by which the risk of damaging the paper sheet is minimized.

A still further object is to provide an automatic machine of the class described which has a smooth rewinding spindle and which after each rewinding operation and subsequent severing of the paper sheet provides for a cautious wrapping of the leading end of the sheet supplied, around the spindle and a smooth start of the new rewinding operation. a

Further objects as well as the various features of the invention will appear from the following specification read in connection with the drawings, which illustrate an embodiment of a rewind- In all figures the same reference numerals are used for the. same parts.

In the specification and drawings certain parts which are of conventional design and similar to those of ordinary rewinding machines, are not shown. and described in full details. This, for example, is the case with the detachable mountings for a rotatable supply roll 29, which mountings comprise a three-part supply roll spindle l8, bearings I9, 29', 2| and 22, clutch 23, brake drum 24, brake band 2 5, brake lever 26 and weight 21. Of substantially conventional design is also the machine frame which comprises spaced stands I and 2 suitably braced, the former being hollow in order to support spaced bearings for various rotatable parts, and the rollers 3, 4 and 5 journalled in the frame for guiding the paper sheet 30 from the supply roll 29 to the rewinding spindle 6.

The rewinding spindle 6 has a smooth cylindrical surface and is supported for free axial and rotational movement by a horizontal composite bearing sleeve 49 journalled in the stand I by means of conical roller bearings 52 and 53 permitting rotation but preventing axial movements of the sleeve. Projecting coaxially to the sleeve 49 from a collar 54 on the exterior side of the stand I is a servomotor cylinder 45 into which the spindle 6 and the sleeve 49 projects at their rear extremities. Movable within the cylinder 45 is a piston 46 within which a reduced extension of the spindle 6 is free to rotate, but engaged for axial movements with the piston by a pair of conical roller bearings withheld by a nut 41 screw-threaded on said extension. Fixed onthe spindle 6 and the sleeve 49 within the cylinder 45 are clutch members 5| and 5| respectively, which in the forward or operative positionof the spindle 6 are in mutual engagement for entrain- 3 ing the spindle 6 in rotation of the sleeve 49, but which are released from such engagement by rearward movement of the spindle with the piston 45.

Rotational movement from the shaft 9 of a motor I is imparted through a pulley l thereon and a belt H to a member or pulley I2 fixed on ment [6 carries a hand lever I5, which thus may be used for starting the rotation of .the spindle 6 by manual operation. In addition the shaft carries an arm I23 connected by a rod 122 to a cam follower 121 for automatic operation, as will be described later.

Mounted on a bracketon-theoutsideof the stand I are an -electro-magnet '35, a lever/39 operated thereby and a valve-housing -4| .ffor a valve ---slide 40 adapted to be moved by the lever 35 for alternatively connecting a source (not shown) of pressure fluid such-as 'compressedair to the forward or rear ends-of thecylinder45 through conduits-44 or- 41 respectively.

A pawl 42 pivoted on the 'housing'4lris arranged as shown in Fig. -2 above one end. of the lever.39 g5 and adapted ina lifted position to .permit free movement thereof and when not so lifted to.be withheld by the lever so as not-"to prevent movement of the lever'and valve slide from theposition shown, in which fluid pressure is applied to the rear side of the piston ffi to :theinverse position. Af-terthe lever has moved; the pawl-wilhfall down behind the lever so as ,tozprevent renewed shiftingof the valve until thelpawl is .againlifted.

The armature of the electro-magnet .35 in addition :to engaging the lever 391s alsoconnected througha wire -36, passed over rollers 3],landa spring-33, to-the brake'band for-the supplyroll spindle so as to cause brakingsof the .same when operated. -Operating circuits of the electro-magnetszfl and 35-are connected in parallel toithemaii1i33 through front contacts on a relay .or .magnet switch 32, the magnet coilof which is connected to the mains through a switch 3|, so positioned as to-be engaged by the periphery ;.of Y the rewound 'rollandthus constituting a means sensibleztmthe quantitysof paper rewound.

From the foregoing it will be understoodthat with the switch 3| positioned for being operated when the rewound roll 1 has attained the desired diameter, the operation of r the mechanism so far described will beas follows when thexmachine started:

After the supply roll 29 has been placed in position and the motor -I has been started, the paper sheet 30 is placed over the guiding rollers -'3,*4-and5 and placed-around the spindle 9 by hand inthe usual manner which spindle isxthen started for'clockwise rotation as viewed in Fig.

belt"! l-is slackened, and the rotation of the-wind- I ing spindle-6 ceases. Theoperation of the relay 4 32 also causes operation of the magnet 35, thereby increasing the braking force on the roll 29 so as to stop the same immediately. Hereby it is obtained that the paper sheet 30 will remain tight without curving between the peripheries of the roll 29, the guiding rollers 3, 4 and 5 and the roll 28. Further on operation the magnet 35 will through the lever39 press the slide 40in the valve "housing 4| to the-right, and thepawl=42 resting on the extremity of the lever 39, will now fall down behind the same and lock the slide 49 in .this position. Compressed air (or another medium) now flows through the input passage 343, the slide :housing 4| and pipe 44 to the left hand side of the piston 46 in the cylinder 45, while the air to the right of the piston is passed into ffree air through pipe 41 and the slide housing 4|.

By the movement of the piston 46 to the right, the clutch 5|, 5| is disconnected, the spindle 6 is :entrained'so far'that the extremity of the spindlepasses-a short distance into the sleeve --49, and the roll 28 is released from the ;spindle,-disengaging the switchBl which therefore through relay 32 releases the magnets 35 and 34. However, .the pawl 42 :keeps the slide 40 in the same positionso that .the spindle :6 remains within the sleeve-49.

To receive "the roll .28 and move .the same transversely out of the .path of the rewinding spindle 6 afterthelatter has been withdrawn, a cradle-like supporting structure is provided, which consists-of two rollers -'and 56 extending parallel to thees pindle-fi sand interconnected by links 69st the-extremity of levers 59 keyed to a shaft-6l which isjournalled in the stand I and likewise is parallel to the-spindle --6. Keyed to the shaft 61 is also a sloping frame-like guiding memberv58. for -a. running weight I51 which by its weight in ,the ;position shown in Fig. 1 tends to move the shaft 6| anti-clockwise as viewed in Fig. 1, thereby keepingthesupportingsstructure 55, 56, 59,30 inan upper position just underneaththeroll .28 being rewound. To a lever -63 keyed tothe shaftfil is connected a,rod.64.which isguidedin-a bearing 65on the stand I and ina bifurcation at its .lower extremity carries a cam follower. 66. Ashoulderformedbythe saidbifurcation v.on-the rod. 64 bears,'.in..the position shown in Fig. 1, against. the bearing :B5,..thereby.limiting anti-clockwise rotation ofthe vshaft .6l. -In.this position theiollowerfifi .is .situateda short .distance above.thehighest portion of .2. corresponding cam 61 keyedto .acamshaftfifljournalled in .the stand l.

.A;cam;6 2. on one of .the.,levers59.is.arrangedfor closing ..a switch =69 .on clockwise rotation .of the shaft.6l .beforethe followerlfificontacts .the cam 3'1. .Theswitch'i69 is -connec'ted'lin the operating circuit of a magnet switch or relay '19 in the operating circuit .of an electro-magnetjlll, which, when .operated, through a link J8] lever "82 and shaft183 .engagesa clutch '85 connecting a pulley .81 toawoi'm gear '86. .The pulley '8] is connected .bya belt to a pulley-8 .onthe shaft 9 of the motor l2, and the .worm. gear'.86 .is connected through a shaft 88 and conical pinionst89 and 99*to'the .cam shaftBB, whereby .the. speedof the motor is geared down very considerably, so'that the speed of thecam shaft will 'befor example one-revo1ution'intwo'seconds.

The frame or guide 58 is connectedatfa point to :the right .of the-shaft-Bl, as viewed-in -'Fig. l, to one end of "a wire 9|, which ispassed over rollers =92 and at itsyothehend -is connected' to thepawl 42.

the motor 1 through the pulley 8 and the members 86-99. The rotation of the cam shaft is assumed to take placein a clockwise direction as viewed in Figs. 1 and 4. During the first part of this rotation-about one-quarter of a revolution-after the follower 66 has engaged the cam 61, theshaft 6I is turned clockwise following the curvature of the cam .61 until a dwell on thi cam is attained, corresponding to the. position of the members 5564 shown in Fig. l. During. this.

movement the slope of the guide 58 is reversed so that the weight 51 runs to a position in which it adds to the weight of the roll 28. Also, due to the "rotation of the arms 59, the roll 58 is lowered and thereby moved out of the path of the spindle to a position'in which the portion of the sheet 39 extending between the roll 28 and the guiding roller 5 faces the path of the spindle 6 as shown to the right in Fig. 5, and the support 55, 56, 69 for the roll is turned to a sloping position in which the roll 28 tends to roll off in a clockwise direction onto a sloping table I94, but is withheld by the taught unsevered sheet connecting the same to the supply roll 29. Further, as soon as during this movement of the shaft 6| the top of the roll 28 has left the bottom of the path of the spindle 6, the wire 9I, being tightened, lifts the pawl 42, the spring 38 acting on the armature of the magnet 35 pulls the slide 49 to the left, the compressed air enters the cylinder to the right of the piston 46, and the spindle is pushed forward into operating position. By this arrangement it is obtained that the spindle 6 cannot interfere with the roll 28.

1 On return of the spindle 6 to operative position,

the clutch member 5I engages the member 5I, but the spindle does not yet start rotation, the pulley I2 being not operatively connected to the pulley I9.

A shaft 91 journalled on the top of the stand I and extending parallel to the spindle 6 carries substantially L-shaped spaced levers 98, 99 interconnected at their free extremities by a slotted hollow tube or yoke I99, likewise extending parallel to the spindle 6 and capable of being moved transversely to the spindle ina path just below the latter. The shaft 91 is connected by a lever 96 to a rod 95 which is guided in bearings (not shown) on the stand I and at its lower end carries a cam follower 94. A spring I26 acting on the rod 95 keeps the follower 94 in contact with a cam 93 so positioned on the shaft 68 that during the first part of the revolution of the cam shaft just described, the follower 94 contacts a lower dwell thereon, whereby the yoke I99 is held in a position outside the path of the roll 28 and at the exterior side of the sheet 39 extending between the latter and the roller 5, in which position the slot I9I in the yoke I99 faces the sheet. A rising portion of the cam 93 followed by a higher dwell, causes the shaft 91 on lowering of the cradle 55, 56, 69 and return of the spin- .dle 6 to its operative position, to turn clockwise,

thereby swinging the levers 98, 99 with the yoke I99 to the left causing the latter to engage the sheet and push or press the same into a loop between the spindle 6 and the roll 28, as shown in Fig. 4 and to the left in Fig. 5, whereby the sheet will partly enclose the spindle, the roll being thereby slightly unwound and turned anti-clockwise on the rollers 55 and 56.

' Freely rotatable'in bearings supported by resilient arms H5, H6 and H1, H9 respectively, from the levers 98, 99 rubber coated rollers H3 and H4 are provided for pressing the sheet 39 against the side and bottom surfaces respectively, of the spindle 6 during the later part of the said movement of the shaft 91.

A stationary cutting knife or severing member I92 fixed to the machine frame by means not shown, is provided ahead of the yoke I99 and in such a position in the path thereof that in the innermost position'of the yoke, as defined by the higher dwell on the cam 93, the knife I92 enters the slot I9I therein. The knife I92 as well as the yoke I99 and the slot I9I are all somewhat longer than corresponding to the width of the sheet 39. A glue roller I93 rotatably supported from the machine frame and having glue applied to it by clockwise rotation thereof by means not shown (such as by transmission from the cam shaft 68) is provided underneath the knife I92 in such a position as to be tangent to the bottom side of the yoke I99 in the innermost position of the latter.

Journaled in bearings on the levers 98 and 99 is a cross bar I99 on which a shelter plate H9 is supported by plate springs I I I. Rigidly connected to the cross bar I99 is a gear segment I98 which normally rests on a stop I25 on the lever 99, in which position the shelter plate II9 lies flat between the levers "98 and 99 ahead of the roller H4 and behind the yoke I99. The outer portion of the .plate II 9 is supported by plate springs I I I. The outer portion of the plate H9 is curved towards the side facing the spindle 6 with a curvature corresponding to that of the latter, and carries small freely rotatable pressure rollers I I2 and a resiliently mounted pressure bar II9. A rack I91 guided in hearings on the stand I carries in its lower extremity-a cam follower I96 cooperating with a cam I on the cam shaft 68 and held in contact therewith by a spring I24 acting on the rack I91. Ihe rack is so positioned that it meshes with the segment I98 in the innermost position of the levers 99 and 99.

The cam I95 and a further cam I29 on the cam shaft 68 are so shaped and positioned that while the follower 94 is still on the higher dwell of the cam 93, the rack I91 will be raised and again lowered and the cam I29 will engage the follower I2I on the rod I22 previously referred to so as to turn the shaft I1 anti-clockwise.

The operation of the structures just referred to, which are all controlled by the rotation of the cam shaft, is as follows:

When the follower 94 approaches the higher dwell of the cam 93 and consequently the levers 98 and 99 approach their innermost position, the rollers H3 and H4 keep the sheet 39 in engagement with the spindle 6, the segment I98 engages the rack I91, the knife I92 enters the slot l9! thereby severing the sheet 39, and the glue roller I93 contacting the sheet just behind the severing line applies an adhesive layer to the tail end of the sheet extending from the roll 28.

Subsequently to the severi operation, the roll 28 will roll off from its supports 55, 56 onto the inclined table I94. It will be appreciated that when doing so it will turn in a rewinding direction so that the tail end of the sheet will ,'9 spindle from said driving means on the completion of a rewinding operation, displacing means adapted on withdrawal of said spindle to receive a rewound roll therefrom and move the same transversely to a position in which it is situated outside the path of the spindle and in which the interior side of the paper sheet behind the rewound roll faces said path, and. a wrapping and cutting mechanism which comprises a cutting member and a member parallel to the spindle and movable transversely thereto, which latter member is adapted on removal of the rewound roll from the path of the spindle and returning of the spindle to operative position, to engage the paper sheet between spindle and roll from the outside and move the sheet into contact with 'the spindle for a new rewinding operation and into operative engagement with said cutting member.

4. A paper rewinding machine comprising means for rotatably supporting a supply roll, a spindle for rewinding a paper sheet unwound from said supply roll, guiding means for said spindle permitting rotational and axial movements but preventing transverse movements thereof, means for withdrawing said spindle axially from an operative to an inoperative position and again returning it to said operative position, driving means comprising a rotating member surrounding said spindle, a first clutch member fixed to said spindle outside said guiding means, a second clutch member fixed to said rotating member and adapted to be engaged and disengaged by said first clutch member by the movement of the spindle to and from said operative position respectively, displacing means adapted on withdrawal of said spindle to receive a rewound roll therefrom and move the same transversely to a position in which it is situated outside the path of the spindle and in which the interior side of the paper sheet behind the rewound roll faces said path, and a wrapping and cutting mechanism which comprises a cutting member and a member parallel to the spindle and movable transversely thereto, which latter member is adapted on removal of the rewound roll from the path of the spindle and returning of the spindle to operative position, to engage the paper sheet between spindle and roll from the outside and move the sheet into contact with the spindle for a new rewinding operation and into operative engagement with said cutting member. a

5. A paper rewinding machine comprising means for rotatably supporting a supply roll, a brake for said supply roll, a spindle for rewinding a paper sheet unwound from said supply roll, guiding means for said spindle permitting rotational and axial movements but preventing transverse movements thereof, means for withdrawin said spindle axially from an operative to an inoperative position and again returning it to said operative position, means for starting rotation of said spindle on its return to said operative position, means comprising an electric switch sensitive to the amount of paper rewound on said spindle, means comprising an electromagnet controlled by said switch for operating said brake, starting withdrawal of said spindle and interr-upting' said rotation on the completion of a rewinding'operation, displacing means adapted on withdrawal of said spindle to receive a rewound roll therefrom and move the same transversely to a position in which it is situated outside the path of the spindle and in which the interior side of the paper sheet behind the rewound roll faces said path, and a wrapping and cutting mechanism which comprises a cutting member and a member parallel to the spindle and movable transversely thereto, which latter member is adapted on removal of the rewound roll from the path of the spindle and returning of the spindle to operative position, to engage the paper sheet between spindle and roll from the outside and move the sheet into contact with the spindle for a new rewinding operation and into operative engagement with said cutting member.

6. A paper rewinding machine comprising means for rotatably supporting a supply roll, a spindle for rewinding a paper sheet unwound from said supply roll, driving means comprising a rotating member surrounding said spindle, a servomotor comprising a stationary cylinder coaxial to said spindle, a piston within said cylinder and connected to the spindle for moving the same axially, means including a control valve for supplying pressure-fluid to said cylinder on alternate sides of said piston for withdrawing the spindle axially from an operative position on completion of a rewinding operation and again returning it to said operative position, a first clutch member fixed to said spindle within said cylinder, a second clutch member within said cylinder and fixed to said rotating member and adapted to be engaged and disengaged by said first clutch member on movement of the spindle to and from said operative position respectively, displacing means adapted on withdrawal of said spindle to receive a rewound roll therefrom and move the same transversely to a position in which it is situated outside the path of the spindle and in which the interior side of the paper sheet behind the rewound roll faces said path, and a wrapping and cutting mechanism which comprises a cutting member and a member parallel to the spindle and movable transversely thereto, which latter member is adapted on removal of the rewound roll from the path of the spindle and returning of the spindle to operative position, to engage the paper sheet between spindle and roll from the outside and move the sheet into contact with the spindle for a new rewinding operation and into operative engagement with said cutting members 7. A paper rewinding machine comprising means for rotatably supporting a supply roll, a spindle for rewinding a paper sheet unwound from said supply roll, guiding means for said spindle permitting rotational and axial movements but preventing transverse movements thereof, means for withdrawing said spindle axially from an operative to an inoperative position and again returning it to said operative position, means for rotating said spindle in said operative position for performing a rewinding operation, displacing means for rewound rolls, which means comprises a supporting device so located that on withdrawal of the spindle it receives the roll rewound thereon, and mounted for moving transversely with the roll resting thereon, to a position in which the roll is situated outside the path of the spindle and tends to roll off from said, supporting device in a rewinding direction, and in which the paper sheet behind said roll is taut and the interior side thereof faces said path, and a wrapping and cutting mechanism which comprises a cutting member and a member parallel to the spindle and movable transversely thereto, which latter member is adaptedon removal of the rewound roll from theapathioiithe spindle and returning, of the spin- 61193 120. operative position; to? engage the paper sheet? between spindle and roll from the-outside and'm'ove" the sheet into contactwith the-spindlefori a new rewinding operation and'into' 011* erativeengagement with said cutting.- member.

8. A paper rewinding machine comprising means-for rotatably supporting 'asupply roll, a brake for said supply roll, a spindle for rewinding' a paper sheet unwoundsfrom said'supply roll, driving means comprising a rotatingmombersurroundin'g said'spindle, aservomotor comprising a stationary cylinder coaxial to said spindle,- a piston within-said cylinderand connected'to the spindle formoving the same axial- 1y; means includinga control valve for: supplyingypressure fluid to said cylinder onalternate sidesof said-piston for withdrawing, the-spindle axiallyfromi an operative position a on complee tionof. a-vrewinding, operation and again returning': it to said operative position, a first-clutch member fixed to said spindle withim said cylinder, a second clutch member withinsaidlcylinder and fixed: to said rotating member and adapted to be engaged and disengaged bysaid fi-rst clutch memberron movement of. thespi ndle to and; from said operative position respectively, displacing means for rewoulnd rolls, which means comprises a supporting; device so located that on withdrawal of the spindle it receives theroll rewound thereon, and mounted ionmoving-transversely with the roll resting; thereon, to a positionin which the rollis situated-outside the. pathof the spindle and tends to. roll 01f fromsaid supporting-device in a rewinding dilrection,. and in which the paper sheet behind said-roll is taut and the interior side thereofi faces-said path, sensitivemeans so positionedwith respect tosaidspindle and said "supportingtdevice that it is engaged Joy the. periphery. ofla-rewound roll thereon. so as ltolad'opt an operative. position on completion of a. rewinding. operation. andan inoperative position on transversemovement of said roll by said displacing means operating means, controlled by said sensiti've means and. adapted in the operativeposition of said sensitive means to operate said brake and to position said control valve for withdrawal of the spindle by said pistonand in the operative position of said sensitive means to release said brak'e'and position said control valve forreturning the spindle to the operative position thereof, locking means for delaying said latter positioning' of the control valve until said roll has'beenremoved fromsaid path; and a wrapation and into operative engagement with said cutting member.

91A paper rewinding machine comprising means'forrotatably supporting a supply roll, a spindle" for rewinding a paper sheet'unwound from'saidi supply roll, guiding means for said spindle' permitting' rotational and axial movements but preventing transverse movements thereof, means for withdrawing said spindle axial-lyfromfan' operative to' an inoperative positiomand againreturning it to said. operative position, means. for rotating saidspindle insaid:

operative: position for, performing. an rewinding operation, displacing; means adapted on? witl'b draw-a1 of said spindle to receive a rewound: roll therefrom and'move thesame transversely! to a position in-which -it is situated outsidethez path off thetspi-ndleand in which the interior side 'ot the paper sheet behind the rewound rollfaces said path, and a'- wrapping" and cutting mocha-- nism; which comprises sheetengaging means comprisinga yoke parallel to the. spindle and==removabletransversely thereto. andlhaving a-longitudinal-.- slot anctadaptedon removal of said roll by said: displacing: means and returnof said spindle to operative position to press said sheet inwards betweenspindle and: rollso asto form a loopeengagingthe spindle on apart Ofsthe peripherythereof, astationary cuttingknife registering with saidsIOtin-the innermostposition of said yoke for severing said sheet said sheet engagingmeans furthencomprising resilient pressingrzmeansiorkeeping thesheet iii-engagement with said spindle during cutting.-

10. A paper rewinding: machine comprising means for rotatably supportinga supply roll a spindle for rewindingl a" paper sh'eetl unwound from-saidsupply rollgguiding meansforsaid spindlelpermitting rotational! and. axial move ments. butpreventing transverse movements thereof; means. for withdrawing said spindle. axially from an operativeto an inoperativesposir tion and again returning it to said'. operative position, means for rotating saidispindleiin said operative. position for performing a rewinding. operation; displacing means adapted on withd'rawal ofl'saidspindle to receive a rewound roll therefrom and, move the same transversely to a position'in which it is situatedsoutside thepatli of "the spindle and'in which the interior side of the paper. sheet behind'the rewoundlroll faces said" path, a" wrapping, andcuttingmechanism whichlcomprises sheet engaging. means "comprising' a yoke parallel to the spindle andremovable transversely'thereto and having" a" longitudinal slotandiadapted on removal'of said" roll by. said displacing means" and" return of said" spindle to operative "position to press said sheet inwardsb'etween spindle an'd'roll so as to form" al'oopengaging; the spindle on a part of. the periphery thereof; a stationary cutting knife registering-with saidslot in the innermost post'- tion of said" yoke for severingsaid" sheet", said sheet engaging means further comprisingresil ient pressing means for keeping the sheet" inengagement with said spindle during cutting; and "a glue roller parallel tosaid spindle and so located adjacent saidcutting knife that in'theinnermost' position of said" yoke, the sheet is firm-ly'pressed against said roller by" said yoke" so as" to receive' an adhesive coating ahead of the cutting line.

11: A paper rewindin'g machine comprising meansfor rotatably supporting a supply-roll; a spindlefor rewinding a paper sheet unwound from: said-supplyroll, guiding means for'said spindle permitting rotational and' axial movements" but preventingtransverse movements thereof; means for withdrawing said spindleaxially from an operative to an inoperative'position and again returning it to said operative position, slippingmeans for slowly"starting':ro'- tation of saidispindle-pn its return tosaidoperiative position; means: for." interrupting rotation; ofi'saidtspindleorr thescompletion of err-rewind ing operation,- displacing means adapted on. withdrawal; oil-said spindle to receiyeza; rewound: roll therefrom vand;v move the same a'trasisverselyr' 13 to a position in which it is situated outside the path of the spindle and in which the interior side of the paper sheet behind the rewound roll faces said path, and a wrapping and cutting mechanism which comprises sheet engaging means comprising a yoke parallel to the spindle and removable transversely thereto and having a longitudinal slot and adapted on removal of said roll by said displacing means and return of said spindle to operative position to press said sheet inwards between spindle and roll so as to form a loop engaging the spindle on a part of the periphery thereof, a stationary cutting knife registering with said slot in the innermost position of said yoke for serving said sheet, said sheet engaging means further comprising a resilient guiding and pressing device adapted during the slow start of the spindle to wrap the forward portion of the sheet remaining after the severing operation entirely around the spindle after cutting and after the spindle has started pulling to return to an inoperative position before said yoke leaves the cutting position.

12. A paper rewinding machine as claimed in claim 11 and in which said guiding and pressing device comprises resilient means for making the outermost end of the sheet engage the paper sheet in the nip ahead of the spindle with a light pressure.

GUNNAR ROEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 683,865 Skofsrud Oct. 1, 1901 1,298,013 Crowe Mar. 25, 1919 1,467,841 Cumfer Sept. 11, 1923 2,366,999 Campbell Jan. 9, 1945

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