US3501104A - Web winding apparatus - Google Patents

Description

March 17, 1970 A. J. HELLEMANS 3,501,104

I WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 1 INVENT OR ATTORNEY March 17, 1970 Filed Feb. 2, 1968 i A. J. HELLEMANS 3,501,104

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WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Shets-Sheet 5 a: l m 35 J 27 (Q H0 m INVENT OR ATTORNEY 'Mmh 17, 1970 A. J. HELLEMANS 3,501,104

WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 6 FIG. 5

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WEB WINDING APPARATUS Filed Feb. 2, 1968 9 Sheets-Sheet 8 INVENTOR Zw, w ATTORNEY 'Ma'rch 17, 1970 Filed Feb. 2, 1968 A. J. HELLEMANS WEB WINDING APPARATUS 9 Sheets-Sheet 9 IOO'E I roe 1 :09

E310] E500 rjjfi F I 6.9 I MENTOR BY 1 M 00%;? flMM M0 2 ATTORNEY United States Patent U.S. Cl. 242-56 14 Claims ABSTRACT OF THE DISCLOSURE A web winding apparatus in which the web is transferred from one rotating core to another without interruption. An arcuate guide plate extends partially around the periphery of the new core to define with the core periphery a narrow passageway into which the web end is threaded after being severed from the remainder of the web. A nozzle situated on the web path opposite the guide plate emits a stream of air under presure as the web end is severed, the stream of air entering the entrance of the threading passageway generally in the direction of the passageway, the effect of the air stream being to direct the severed web end into the pasageway and bias the same into contact with the rotating core periphery so that the web end becomes wound upon the core. Preferably, the guide plate extends around a portion of the core periphery in excess of 180 and is formed in two sections so as to be separable from one another to permit the guide plate to be moved to inoperative position remote from the web core so that unconfined winding can take place. A web cutter may be formed integrally with the air nozzle.

This invention relates to web winding apparatus for use in severing a travelling web along a transverse line and causing the web portion upstream of such line to ,wind onto a rotating core without interrupting the motion of the web.

The invention is particularly intended for use with machines for coating, drying, calendering or otherwise treating a continuously travelling web drawn from a roll, wherein a winder is provided with pivotal arms which carry at their extremities cores for Winding up the web. As a roll of web has been wound up upon one corethe web must be severed and the newly formed end of the Web must be secured to another core for winding another roll of web thereon without interruption of the treating process. After the winding of the web on the other core has started, the arms of the winder are pivoted for locating the other core at the position previously taken by the one core, and said one core with the roll of web is taken away from the winder and replaced by a new core for receiving a further roll of web.

A number of apparatus of the described kind require particular cor-es with peripheral openings and the interior of which is maintained under vacuum for securing the end of the web. Other apparatus require cores with adhesives applied thereto in order to secure the web end.

Further, the known apparatus are not suited for conveniently treating thin webs with larger widths, say webs with a width of 1.20 m. and a thickness of 0.05 mm., since they inevitably cause wrinkling of the web.

An object of the present invention is to provide a web winding apparatus which permits the use of conventional cores and core holders which are used in large quantities in machines where the severing of the web and the wrapping of the newly formed end onto a core is done :by hand.

A web winding apparatus according to the present invention comprises a web guide mounted for prede termined displacement to and from an operative position and shaped so that in that position it can define with a suitably located driven core a pathway extending partly around the core, a web cutter displaceable from an inoperative position to an operative position at or near one end of said pathway for transversely severing a web during its travel past a said driven core, and means for delivering a stream of air in a direction across said notional web path from the cutter side thereof and at a position or positions such that when severance of a said web by the cutter takes place while the web is travelling past a said rotating core but in contact therewith and in a direction corresponding with the direction of rotation of such core, such air stream or streams will constrain or help to constrain the freshly cut web end at the upstream side of the line of cut to follow the periphery of such core and to enter said pathway so that the web section upstream of such line of cut becomes wound up on said core. I

The web guide which cooperates with the driven core may be in the form of a trough, e.g., a trough with a cylindrical interior defining with the core periphery a narrow annular passage for the leading end of the web section to be wound on such core. The trough may subtend an angle of more than if it is formed in hinged sections which can close around the core.

It is preferable for the web guide and the web cutter to be mounted on pivoted arms which can swing towards the web path from opposite sides thereof.

A freely rotatable roller may be provided which before the severance of the web presses same against the driven core on which the web section upstream of the line of cut is to be wound.

The cutter preferably cuts the Web in a position at or in the entry end of the guide pathway along which the said upstream web section is to be conducted.

The cutting operation is assisted if the web is held against or near to the web guide at the entry end of said guide passage during the severance of the web. This disposition of the web against or close'to the web guide maybe ensured by means of a deflecting roller or other member which presses against the web at a position a little downstream of the cutting position.

For purposes of the present invention the term air stream envisions a laminar sheet or laminar sheets of air or a plurality of jets of air, produced by forcing air through an air delivery slot or slots or air delivery openings of other form disposed along one or more lines transverse to the web. Such discharge openings may be openings in a blower tube mounted for movement with the web cutter. As will be described hereafter, the direction of a stream of air along the narrow pathway between the driven core and the web guide materially assist in the initial guidance of the upstream web section around the driven core and helps to prevent wrinkling of the web. In order that air directed into the pathway along the web guide, may have the best effect, the guide is preferably shaped in the form of a shell or trough with lining pieces which seal against the core and/or supports therefor, or at least restrict any lateral escape of air from the pathway, so that all or most of the air entering the pathway is constrained to flow along this pathway, with the web.

Apparatus according to the invention and as described hereinafter can be used for winding thin and wide webs as defined hereinbefore. There is frictional contact with the web at only a few places in the apparatus before and during the cutting of the web so that there is little risk of injury to the web and the apparatus can in fact be used for winding light-sensitive webs as manufactured in the photographic industry.

The driven core onto which the web section upstream of the line of cut is to be wound may be carried by a winder capable of carrying two or more driven cores and swinging them successively into position ready for receiving the next web section. Thus the winder may comprise core-carrying arms rotatable about an axis for moving the cores successively into position for receiving a new length of web. Once a new web length has begun to wind onto a core, this core, while continuing to be driven, may be swung bodily away so that its former position is taken by an empty core and this empty core is ready to receive the next web section at the moment the web is severed again. The invention includes apparatus incorporating any such winder. If desired, conventional winders as presently available may be used.

An embodiment of the invention, selected by way of example will now be described with reference to the accompanying drawings, in which:

FIGS. 1a and 1b show diagrammatically a vertical section of the apparatus in the inoperative position, including a conventional roll stand.

FIG. 2 is a horizontal section on line 22 of FIG. 4.

FIGS. 3 to 6 are sections similar to FIG. 1 and illustrate the apparatus in various phase of its cycle of operation, the roll stand being omitted.

FIG. 7a is an enlarged cross-sectional view of the knife holder on line 77 of FIG. 7b.

FIG. 7b is a partial and enlarged front view of the knife holder.

FIG. 8 is a diagram of the pneumatic circuit for the apparatus.

FIG. 9 is a diagram of the electric circuit for the apparatus.

The apparatus is mounted between two vertical columns 10 and 11 which are spaced apart and arranged in parallelism and are rigidly secured by means of a base plate 12 and 13 to the floor (FIGS. 1b and 2).

At about half the height of the columns are provided bearings 14 and 15, wherein a shaft 16 is pivotally journalled. At the opposite side of the columns is provided a channel member 17 which extends horizontally from one column to the other and wherein the rigid part of the air conducts (not shown) for the air motors are located.

The shaft 16 bears arms 18 and 19 rigidly secured at opposite ends thereof. The arms are reinforced by means of ribs, such as rib 20, which are welded thereto and confer a T-shape cross-section to the arms. At the opposite side of the shaft 16 the arm 18 passes into a crank arm 22, the free end of which is pivotally attached to one end of a double-acting air motor 24. This motor is pivotally secured at its upper end to the column 10 by stub shaft 26.

The arms 18 and 19 carry between them the free rotatable guide roller 27 and the pressure roller 28 which is provided with a resilient covering 29. The bearings of roller 28 are mounted for small displacements and they are spring-biased towards the location of core 67, so that when the arms 18 and 19 are operated the roller 28 is resiliently urged against the core 67.

The arms 18 and 19 are further provided with sub shafts 30 and 31 on which the arms 32 and 33 are pivotally mounted. The arms 32 and 33 are connected to each other through the free ends of the tube 34 to which the knife 35 is secured. The arms 32 and 33 are controlled by double-acting air motors 36 and 37, one end of which is pivotally connected to the arms, and the other end of which is pivotally secured to the crank arms, such as arm 22, which make part of the arms 18 and 19.

A torque tube 40 is mounted for oscillation on the shaft 16 by means of needle bearings 42 and 43. Flanges 44 and 45 are welded to the extremities of the tube 40, and arms 46 and 47 secured to said flanges. The arm 47 asses at the opposite side of the tube 40 into a crank arm 49, which is pivotally connected with its free end to one end of a double-acting air motor 51. This motor is pivotally secured at its lower end to the column 11 by stub shaft 53. For clearness sake, the air motor 51 which would not be visible in FIG. 1b has been shown in broken lines.

The free ends of the arms 46 and 47 are curved and they carry a first shell 54 in the form of a trough which is curved through about 180 and the length of which exceeds the length of the core 67. A second shell 55 which is curved through about is hingedly connected with the first shell on a transverse line, indicated by 52, which runs parallel to the axis of curvature of the shell. The shells which are made from sheet-iron, are reinforced by nose-like elongate ribs such as 56 and 57 and the free end of the shell 54 is fitted to a transverse member 25 with U-shaped cross-section. The rib 57 is provided with an arm 58 which is located centrally thereof, and which is pivotally attached to one end of the double-acting air motor 59. The other end of the motor is secured to a lip 60 Welded on the tube 40.

Each of the columns 10 and 11 is further provided with a horizontally projecting support, such as the support 62 shown in FIG. lb, between which a free rotatable guide roller 61 is mounted.

In front of the arrangement just described is located a convenional roll stand 63 of the reversing type (FIG. 1a), having two pairs of driven core plugs 64 and 65 for cores 66 and 67 to be mounted on both ends of a reversible frame 68.

The roll stand is so mounted with respect to the columns 10 and 11 that the axis of curvature of the shell 54, indicated by numeral 69, may coincide with the axis of the core 67 when the shell is put into the operative position, thereby leaving an annular gap 91 (FIG. 2). The frame of the roll stand has been provided at both ends with stationary round core portions, such as 92 and 93, the diameter of which is substantially equal to that of cores 66 and 67. The driven core plugs 64 and 65 freely pass through the core portions. The ends of the core portions are air-tightly fitted to the frame.

The lateral ends of the shells 54 and 55 are provided with pairs of linings 94 and of resilient material, which air-tightly fit onto the core portions 92 and 93 when the shell in the operative position is located around the core.

Between the pairs of linings 94 and 95 are provided the pairs of linings 96 and 97 which fit around the ends of the core 67 without contacting, however, said core.

The web course is indicated by numeral 70.

The FIGURES 3 to 6 illustrate the apparatus in various phases of its cycle of operation, the roll stand as well as a number of reference numerals being omitted since they are not necessary for the understanding of the operation.

The arrangement of the knife 35 and the tube 34 is shown in detail in FIGS. 7a and 7b.

The tube 34 is composed of a heavy elongate metal bar 71 to which a channel member 72 of iron sheet has been hard-soldered so as to form a tube of trapeziumlike cross-section. The sloping underside of the tube is provided with two rows 73 and 74 of small circular openings.

The lateral ends of the tube are closed and the tube is provided at its topside with pressure line unions such as the union 75. The mentioned unions are connected with flexible conduits to a rigid conduit that is located in the channel member 17. The latter conduit is connected with a blower (not shown) so that on operation of the latter an overpressure is established in the tube 34, and a stream of air is produced at openings 73, 74.

The knife 35 is composed of a plurality of small trapezium-like steel blades the form of one blade 76 being the reversed image of the adjacent blade 77. The free ends define a sawtooth profile, and the marginal portions 78 have been ground to obatin sharp cutting edges.

The blades are positioned on the bar 71 on a zone 79 of slightly reduced thickness to receive the blades. At each end of the zone 79 a rectangular abutment plate 80 the thickness of which corresponds to that of the blades, is hard-soldered to the bar 71, and the blades are arranged close to each other between both abutment plates.

The blades are clamped by means of the clamping plate 81, the strip of spring leaf 82, and socket head screws 83 which are screwed in threaded bores of the clamping plate 81. The clamping plate is fixed to the bar 71 by means of bolts 84. The strip 82 ensures the uniform distribution of the pressure forces of the screws 83 on the cutting blades.

The simplified pneumatic circuit for the apparatus is shown in the inoperative position in FIG. 8. It comprises the valves 120, 121 and 122 with two positions four connections for controlling the air motors 36, 37, 24, 59 and 51. The valves are retained in the illustrated position by springs (not shown) and they are controlled by solenoids 100, 101 and 102. Air pressure is regulated and lubricated by the constant pressure outlet valve 124 and the lubricating device 125. Exhausted air is passed through a silencer 126. The simplified electric circuit for the apparatus is shown in FIG. 9. It comprises the main switch 103, the electric motor 104 driving the air compressor, the motor 105 controlled by switch 107, for operating a blower for feeding the tube 34, the push-button start switch 106, the relay A with the normalopen contacts a and a the solenoids 100, 101'and 102 for the valves 120, 121 and 122, the delay relay B with normal-closed contact 1;, and the microswitch contacts 108 and 109.

The operation of the apparatus is as follows.

The apparatus being in the position as shown in FIGS. 1a and 1b, and the roll 21 being almost completed, the operator closes switch 107 in order to start the blower to feed tube 34. After a few seconds the air pressure in the tube 34 has reached its nominal pressure and a stream of air is produced at the openings 73 and 74.

The operator also engages the mechanism of the roll stand for starting core 67 to rotate.

At the moment the roll 21 is completed, the operator actuates a start switch 106. Relay A is excited and remains so through closed contact a whereas the closing of contact a energizes the solenoid 102.

Actuation of the valve 122 causes air motor 51 to retract, thereby rotating arms 46 and 47 in clock-wise direction so as to bring the shell 54 in the position as shown in FIG. 3. At the moment the mentioned position is taken, the arm 49 actuates the lever of a microswitch (not shown), the contact 108 of which closes the electric circuit of solenoid 101.

Actuation of the valve 121 causes air motors 24 and 59 to retract, thereby rotating arms 18 and 19 in anti-clockwise direction until their curved portion 112 rests on the core members 92 and 93 and bringing the shell 55 in the position as shown in FIG. 4.

Pressure roller 28 is driven by its resilient contact with the travelling web and the rotating core 67, whereas guide roller 27 deflects the course of the web past the nip between roller 28 and core 67 to direct the web closely past the transverse edge 110 of the shell 54. At the moment the arms 18 and 19 reach their operative position, a microswitch (not shown) is actuated the contact 109 of which controls the circuit of solenoid 100.

Actuation of the valve 120 causes air motors 36 and 37- to extend, thereby swinging arms 32 and 33 in anticlock wise direction so that the tube 34 and the knife 35 take the position as shown in FIG. 5.

In swinging into the operative position, the knife 35 intercepts the path of the web and servers the web while this is supported on the edge 110 of the shell. The severed end of the web is wound on the roll 21 whereas the newly formed leading end of the web is directed by the cutting edge of the knife 35 in the gap 91 between the core 67 and the shell 54.

The air stream blowing from the openings of the tube 34 deflects the new web end and applies it against the periphery of rotating core 67.

Upon its further entering the gap between the core 67 and the shells 54 and 55 the air stream creates an air cushion which rotates in the same direction as the core and which smoothly applies the web against the core.

The rotating air cushion leaves the gap at the free transverse edge 111 of shell 55.

The new web end enters the nip between the roller 28 and the core 67 as it has made one revolution and it remains firmly secured to the core up from that moment by winding of the next windings.

The creation of the air cushion described, was assisted to a considerable extent by the linings 94 and 95 which prevented lateral air escape.

The linings 96 and 97, which do not contact the core since rotation of the latter would wear them excessively cause lateral air losses which, however, are small since the air entering the lateral space between the linings 96, 97 and 94, 95 creates an overpressure which can only escape at the opening between the transverse edges and 111 of the shells.

The creation of the air cushion was further assisted by the concavely curved part 112 (FIG. 1b) of the arms 18 and 19, which corresponds in shape to the curvature of core portions 92 and 93, and closely rests thereon when the arms are in the operative position. Further help was given by the shoulder portions 113 of the arms 18 and 19, which projects into the gap between the core 67 and the shell 54 at the transverse end 110 and which prevents lateral air escape just below the tube 34.

The operative position of the different parts as shown in FIG. 5 lasts a time suifiicent for wrapping 1, 5 windings of the web onto the core 67. After that time the delay relay B becomes energized.

Upon the energizing of relay B, the contact b is opened so that the circuit of the solenoids 102, 101 and 100, and of the relays A and B becomes currentless. The de-encrgizing of relay B causes contact b to close again, but contacts a and a remain opened.

Valves 120, 121 and 122 return to their initial position so that air motors 36 and 37 are made to retract whereas motors 24, 59 and 51 will extend.

Valves (not shown) are provided in the conduits leading from the valves to the air motors, which ensure the timed response of the air motors when they return to their initial position, so that shell 55 will be completely removed from the core 67 before arms 46 and 47 return, and that arms 32 and 33 have already started to return before the arms 18 and 19 are swung back;

The operator opens switch 107 so that-the blower feeding tube 34 is switched off, and finally the apparatus takes the inoperative position, shown in FIG. 6.

The operator can now remove roll 21 from the roll stand and put an empty core in place. The frame is rotated over in the direction of the arrow and the further winding of the web on the core 67 occurs at the position previously taken by core 66.

It should be noted that the continuous travel of the web 70 has neither been interrupted nor changed during the described operation. The speed of the web is determined by the treating apparatus it is leaving, whereas the tightness of the web is insured by the cores 66 and 67 which are driven through the intermediary of slipclutches and which keep the web at any movement tightened, without need of an accumulator device between the treating apparatus and the severing and wrapping apparatus.

The friction applied to the web extends over only a limited part of its length. The trailing end of the severed web has been gripped between pressure roller 28 and core 67 over some meters only, because the operation of knife 35 is started almost immediately after the roller 28 has reached its operative position. The newly formed leading end is submitted to pressure from roller 28 over a length corresponding to twice the circumference of core 67, since a few windings of the web sufiice to secure it to the core.

The described apparatus has been used for winding webs of polyester with a thickness of 0.02 mm. and a width of 1.20 m. on conventional wooden cores with a diameter of 20 cm. The web speed amounted to 120 m./min. It was noticed that the winding of the web occurred without the slightest trace of wrinkling.

The apparatus has further been used for winding webs of soft PVC with a thickness of 0.2 mm. and a width of 1.10 m. on cores with a diameter of cm. only. The overpressure produced by the air supply corresponded with 280 mm. water column.

In the description hereinbefore it was said that the operation of the apparatus was normally started by the operator when the roll 21 had obtained the limit at which the web should be severed.

It is clear that in practice the apparatus will preferably be controlled automatically by sensing means responsive to the diameter of the roll 24 wound on the core, or detecting a few meters upstream of the apparatus the arrival of a splice in the web since the severing of the web will preferably be done at or near the location of such splice in the web.

In an installation for coating light-sensitive layers on paper or film webs the automatic starting was realized as follows:

The operator who is concerned with the coating apparatus watches the passage of a splice before a given point at the coating station, and presses at that moment the start switch of a control mechanism. A counter is engaged and is driven by the advancing web. The counter starts from a preset value which corresponds to the distance to he travelled by the web from the mentioned point at the coating station through the drying station up to the severing station. At the moment the splice approaches the severing station the counter has counted down to zero and causes the contact 106 of the electric circuit to close. In the mentioned way, the Web is severed at about the locus of the formation of the splices at the unwinding station where successive rolls are joined to each other in order to provide an uninterrupted web.

It is clear that the starting of the counter may also occur automatically in that it is controlled by a sensing device which detects the passage of the splice.

The blower 105 has been continuously working during the operation of the arrangement just described. It is evident that it may also be controlled by the mentioned counter, taking care that it should be started in advance of the operation of the severing station, in order to establish the required air-pressure in the blower tube 34.

The apparatus is not limited to the described embodiment.

In its simplest form, the means defining the annular gap may be defined by the core 67 and the shell surrounding it. The omitting of linings such as 94, 95, 96 and 97, of the portions 113 on the arms 18 and 19, or even of the cylindrical portions 92 and 93, cause considerable air losses at the lateral sides of the shell, which must be compensated by an increased air pressure.

Occasionally, the air cushion may be amplified by feeding air through openings in the shell itself. In the apparatus of the described embodiment this has been experimentally done by feeding air into the transverse member 25, and in providing the shell 54 with openings on a transverse line 127 extending between the legs of the member 25 (see modification in FIG. 6).

I claim:

1. Web winding apparatus for severing on a transverse line a web travelling along a generally predetermined path and without interrupting the travel of the web causing the web end upstream of the severance line to wind onto a rotating core supported adjacent a locus on said path, which comprises an arcuate web guide plate adapted to extend partially around the periphery of said core in generally closely spaced relation thereto, said arcuate plate stretching at least substantially the full line of said core to define with the core periphery a threading passageway for said web and having one end thereof disposed substantially adjacent the web path on the downstream side of the core to constitute an entrance to said passageway, said passageway extending from said entrance away from the web path; a web cutter arranged along the web path for movement to and from an operative position proximate to said passageway entrance to sever said web along said transverse line, thereby generating a free end of said web at said passageway entrance; nozzle means on the side of said web opposite said web guide plate for delivering a stream of air under pressure transversely across the web, said nozzle means being movable to an operative position proximate the passageway entrance to direct said air stream into the passageway entrance generally in the direction of said passageway, thereby to urge the free web end to enter the passageway and press the web within the passageway into contact with the periphery of the rotating core to cause said end to become wound thereon.

2. The winding apparatus of claim 1 wherein said arcuate plate extends around said periphery for an angle of at least about 3. The winding apparatus of claim 1 wherein a roller is arranged upstream of the cutter and nozzle means on the same side of the web path therewith and is displaceable against the web to hold the web in contact with the core periphery preparatory to severance thereof.

4. The winding apparatus of claim 3 wherein said roller in said displaced position is located adjacent the exit end of said passageway.

5. The winding apparatus of claim 1 wherein said web guide plate is movable to an inoperative position remote from the core periphery after said web end is wound upon said core to permit the winding of web packages exceeding the working clearance between the plate and core.

6. The winding apparatus of claim- 5 wherein said web guide plate extends around the core periphery for more than an angle of 180 and is formed in arcuate sections fitting together, said sections being separable to permit the plate to be moved toward and away from the core.

7. The winding apparatus as in claim 6 wherein said plate sections are hinged together for relative pivotal movement to permit separation thereof.

8. The winding apparatus of claim 1 wherein said entrance end of said guide plate carries means cooperating with said web cutter to shear said web along said transverse line.

9. The winding apparatus of claim 1 wherein said web is guided into contact with a portion of the core periphery preparatory to severance and the end of said guide plate opposite said entrance end terminates proximate to the web path approaching said core periphery.

10. The winding apparatus as in claim 1 wherein said web cutter and said nozzle means are integrally connected.

11. The winding apparatus of claim 1 wherein end seals are provided between said web guide plate and the core surface adjacent the ends thereof.

12. Apparatus according to claim 1, wherein said nozzle means for delivering a stream of air comprises a blower tube movable together with the web cutter and having openings therein disposed along at least one line running transversely of the web path.

13. Apparatus according to claim 1, wherein said core supporting means adapted to support a plurality of said cores and to move such cores bodily and successively into References Cited UNITED STATES PATENTS 2/1954 Wolfe 24256 4/ 1957 Petersen et a1. 24256 XR Gurney et a1 24256 Hornbostel 24256 Havens et a1 24256 Shabram 24265 Press 2425 6 Farrell 24256 STANLEY N. GILREATH, Primary Examiner W. H. SCHROEDER, Assistant Examiner

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