US3692251A - Winding,unwinding and tensioning apparatus - Google Patents

Winding,unwinding and tensioning apparatus Download PDF

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Publication number
US3692251A
US3692251A US83730A US3692251DA US3692251A US 3692251 A US3692251 A US 3692251A US 83730 A US83730 A US 83730A US 3692251D A US3692251D A US 3692251DA US 3692251 A US3692251 A US 3692251A
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Prior art keywords
web
roll
roller
winding
unwinding
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US83730A
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English (en)
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James J Melead
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Beloit Corp
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Beloit Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/16—Registering, tensioning, smoothing or guiding webs longitudinally by weighted or spring-pressed movable bars or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/18—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web
    • B65H23/182—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations
    • B65H23/1825—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in unwinding mechanisms or in connection with unwinding operations and controlling web tension

Definitions

  • the invention relates to filament tension regulation apparatus useful to regulate the tension in a moving filament such as during the winding or unwinding of a web or threadlike filament.
  • the invention relates further to a web guide roller assembly for assisting in the movement of a web relative to a roll of the web material such as a splicing roll apparatus useful in web unwinding or a lay-on roll apparatus for use in web winding.
  • the invention further relates to web unwinding apparatus, to web winding apparatus, and to web winding and unwinding apparatus involving combinations of the splicing roll apparatus, the lay-on roll apparatus, and web tension regulating apparatus.
  • the filament tension regulation apparatus comprises a roller mounted for rotation in members disposed at the ends of the roller, the members being supported by pivot arms extending upwardly and downwardly of the member. The arms are of equal length and the roller is centrally located on the member between the pivot areas such that the roller is capable of horizontal motion supported by the pivot arms.
  • the moving filament engages the roller in such a way that horizontal force is applied to the roller in a direction in opposition to a desired pre-determined horizontal force.
  • the web guiding roll apparatus comprises a pair of rollers mounted for rotation and pivotally supported by pivot arms as in the case of the filament tension regulating device.
  • the rollers are located at points symmetrical about a point midway between the pivot arms and thus will undergo pivoting motion.
  • the arms are of equal length and the rollers are preferably of equal mass whereby the device is easily moved into and out of engagement with a web roll for splicing during unwinding or for forming a nip during winding.
  • This invention relates to winding and unwinding ap paratus.
  • the invention relates to apparatus for the regulation of the tension of a moving filament, such as a web.
  • the invention relates to web tension control apparatus useful in web unwinding and web winding.
  • the invention relates to web guiding roll apparatus useful in splicing during web unwinding and laying-on during winding.
  • the invention relates to web unwinding apparatus including a splicing roll assembly and web tension regulating apparatus according to the invention, to web winding apparatus including a lay-on roll assembly and web tension regulating apparatus according to the invention, and to a web unwinding and winding apparatus involving web tension regulating apparatus and web guide roller apparatus according to the invention.
  • Web unwinding and winding operations are well known and involve either the unwinding of a web from a roll of the web material or the winding of a length of web onto a core to form a roll of the web material.
  • the web material is under some tension and in most cases web tension must be controlled for effective winding or unwinding.
  • the size of the roll will continuously change during the operation. For example, in winding, the roll increases in size. Therefore, at constant RPM, the web speed continuously increases which increases web tension as the web is wound resulting in a relatively loose web in the inner portion of the web and a relatively tight outer portion. This can result in extremely poor roll characteristics, web breakage,
  • the web is elastic, such as a plastic sheet
  • increased tension can result in drawing the sheet which reduces its thickness and cross section.
  • the operation is additionally complicated by the fact that the winding and unwinding operations are continuous. That is, after a roll is unwound, the leading end of a fresh roll is spliced onto the trailing end of the unwound roll in a suitable device such as a turret unwinder which sequentially indexes fresh rolls into a splicing position.
  • a continuous winder such as a turret winder is used to index an empty core into position for winding and after a roll is fully wound, the moving web is severed and the leading edge is keyed to the empty core.
  • web tension regulating devices which generally function to monitor web tension relative to a pre-determined value which value may be constant or may vary as the operation proceeds. For example, in winding an elastic web it is frequently desireable to decrease web tension as the run progresses while unwinding is frequently performed at constant web tension. Once a change relative to a desired value of web tension is detected, the web tension is adjusted to the desired value in any convenient way such as by changing web speed, by changing web drag, or both. While several devices, such as dancer rolls, transducers, and the like, are known to detect changes in web tension, these devices have one or more disadvantages such as lack of sensitivity, lack of forgiveness, excess friction, and the like.
  • a roller is used to lay a leading web end on a fresh core by forming a pressure nip into which the web end is introduced. After the roll is initially formed on the fresh core, the lay-on roller is usually spaced from the winding roll surface. In a continuous operation, the roller is moved from a position in adjacency with the surface of a wound roll to form a pressure nip with a fresh core.
  • a splicing roll positioned in engagement with the moving web is moved towards a fresh web roll to engage the trailing end of the unwound roll with the leading end of the fresh roll.
  • the splicing roll is subsequently removed from its splicing position in readiness for the next splicing operation.
  • the lay-on rolls and splicing rolls used heretofore are usually pivotally mounted and suffer from several disadvantages such as the necessity of large forces to move these rollers rapidly from one position to another as in the case of continuous winding and unwinding.
  • the roller is mounted for rotation at each end by a member which is pivotally secured at a first pivot point to a first pivot arm extending generally upward and at a second pivot arm extending generally downward.
  • the pivot arms and member are mounted for motion in a vertical plane transverse to the roller axis.
  • Each pivot arm is pivotally secured to a fixed support thereby pivotally supporting the member.
  • the pivot arms are of equal length and the roller axis lies at the midpoint of a line connecting the first and second pivot points on each roller support member.
  • the roller is thus capable of moving for a limited distance in a purely horizontal plane in a direction nonnal to the roller axis.
  • the pivot arms and member forming the support for the roller are generally in the configuration of a 2" turned on its side and hence the support assembly will be referred to hereinafter as a 2 bar.
  • the filament tension regulating device also includes means to bias the roller with a desired amount of force in a horizontal direction opposite to that induced by web tension and thus the horizontal motion or position of the roller gives an indication of actual web tension relative to a desired web tension.
  • the pivoting support provides a massive dancer roll operating horizontally with minimal friction which is very responsive to changes in web tension thus providing close control.
  • a guide roll assembly includes a pair of Z bar support assemblies arranged as in the case of the tension regulating assembly.
  • the bar includes a pair of rollers, mounted at or adjacent the first and second pivot points respectively at points located symmetrically with respect to a point located midway of said first and second pivot points.
  • the rollers are preferably of equal mass thus providing a balanced unit. While each roller undergoes pivoting motion in a direction normal to the roller axis, the rollers move with little friction and, due to the balanced design, will assume any given position under static conditions. Thus, the rollers are easily moved when in contact with a running web.
  • the guide roll assembly is particularly useful as a lay-on roll or a splicing roll in which case the device will include means to move the roll into adjacency with, respectively, a fresh core for winding or a fresh roll for unwinding.
  • Web winding and unwinding apparatus according to the invention are readily integrated to form an improved continuous web winding and unwinding operation.
  • FIG. I is a diagrammatic side elevation view of a web unwinding apparatus including a web tension regulating device and splicing roll device according to the present invention
  • FIG. 2 is a diagrammatic side elevation of a portion of FIG. 1 showing details of a roll position indicator
  • FIG. 3 is a diagrammatic side elevation view of a web winding apparatus including a web tension regulating device and lay-on roll device according to the present invention.
  • a filament tension regulating device includes a roller 1 having its ends supported by a pair of Z bars 2, one only being shown in the drawing.
  • the Z bar 2 includes a member 3 to which is secured a first pivot arm 4 pivotally secured to member ,3 at a first pivot point 5, extending generally upwards of a member 3 and pivotally secured to a fixed support by means of a suitable pivot 6.
  • the 2 bar also includes a second pivot arm 7 pivotally secured to the member 3 at a second pivot point 8, extending generally downward of member 3 and pivotally secured to a fixed support by means of a suitable pivot 9.
  • Member 3 is thus pivotally supported by pivot arms 4 and 7 by means of pivots 5, 6, 8 and 9 for motion in a plane transverse to the roller axis.
  • roller 1 is mounted for rotation at a point midway between pivots 5 and 8 and pivot arms 4 and 7 are equal in effective length. That is, the distance between pivots 5 and 6 is the same as the distance between pivots 8 and 9.
  • pivot arms 4 and 7 Upon pivoting motion of the pivot arms 4 and 7 in the plane of the paper, it will be seen that the roller axis, and hence the roller, undergoes pure horizontal motion for a limited distance in a direction substantially normal to the roller axis.
  • pivot point 8 will undergo at first a rising pivoting motion to the right followed by a lowering pivoting motion to the right.
  • pivot point 5 will undergo a corresponding initial lowering pivoting motion followed by a rising pivoting motion and thus a point midway between pivot points 5 and 8 will undergo pure horizontal motion to the right.
  • the device upon continued motion to the right, the device would reach a point where upper arm 4 and member 3 are in longitudinal alignment at which point further motion to the right would be impossible.
  • lower arm 7 and member 3 would ultimately be in longitudinal alignment and further motion would cause all points in member 3 to move downwardly.
  • motion of roller 1 is limited to pure horizontal motion and this motion is utilized to control filament tension according to the present invention.
  • the device preferably includes stops to limit the roller to horizontal motion between these limits.
  • a filament, such as a web 10 is drawn from a roll 11 by a pair of driven rollers 12 driven by a motor not shown.
  • the web traverses two rollers of a web guiding roll assembly which is described in more detail below.
  • the web is guided in engagement with the tension regulating roller 1 by conventional rollers l3, 14 such that tension in a moving web applies a horizontal force to the right in the sense of FIG. 1 biasing the roller in that direction due to tension in the moving web.
  • a substantially horizontal biasing force is ensured.
  • the web is essentially horizontal and the angles of web incidence are each about with respect to the horizontal, resulting in a 180 wrap on the tension roller.
  • the angles of incidence can be varied to provide more or less wrap as desired.
  • Web tension is regulated according to the invention by the action of the tension regulation roller 1.
  • the web is to be unwound at a tension of 100 lbs. Since the web is wrapped 180 around roller 1, the web moving at correct tension applies a total force of 200 lbs. to roller 1 to the right in the sense of FIG. 1.
  • This is balanced according to the invention by an opposing force applied to roller 1 by any suitable means such as a hydraulic piston and cylinder 15 pivotally connected to upper pivot arm 4 and to a fixed support 16 to apply a substantially horizontal biasing force to roller 1 to the left in the sense of FIG. 1.
  • the biasing force should be evenly applied to the tension roller 1 and, for this reason, a second piston and cylinder is arranged on the other 2 bar assembly in the manner shown in FIG.
  • the upper pivot arms and frames 16 may be connected by members against which the piston force is applied.
  • a symmetrical force can be applied against the tension roller 1 by a single piston located between the 2 bar assemblies midway of the roller axis.
  • a plurality of pistons are provided between the Z bar assemblies to apply a uniform force to the roller.
  • ten pistons 15 each having an effective area of one square inch are pivotally secured at a point 17 midway between pivot points and 6 on arm 4. Accordingly, hydraulic pressure of 40 psi in each cylinder will apply the proper force of 200 lbs to bias the roller 1 to the left in the sense of FIG. 1.
  • roller 1 With the roller 1 positioned at any given location in its path of purely horizontal motion, the roller will remain stationary if the web tension is the correct desired value of 100 lbs. However, if the tension increases, roller 1 will move to the right and if tension decreases roller 1 will move to the left. Thus, the motion or relative position of the roller gives an indication of web tension relative to a desired value established by the pressure in pistons 15.
  • the piston pressure is set, of course, by conventional compressor means not shown and may be a constant value as in the case of most unwinding operations, or it may be a changing value if desired. In any event, at any given moment in time, the position or motion of roller 1 is a measure of web tension relative to a desired set value.
  • the position of the roller is conveniently detected relative to a reference point which may be located at any point along the path of horizontal motion of the roller such as midway along the path.
  • the reference point can be indicated in any convenient manner such as by aligning a moving part of the Z bar assembly, such as the roller, with a fixed reference point such as frame 16.
  • a position indicator 18 shown in more detail in FIG. 2 is provided.
  • the indicator comprises a rotatably mounted pointer 18 actuated by a chain 19 engaging sprocket wheels 20 secured to shaft 22 which is secured to arm 4 and sprocket wheel 21 secured to pointer 18.
  • arm 4 pivots counterclockwise in the sense of FIGS. 1 and 2 and this causes pointer 18 to rotate counterclockwise.
  • a scale 23 is conveniently located on support frame 16 to indicate the nature (increase or decrease) of a change in tension.
  • the magnitude of the change in tension is indicated by the rate of motion of the roller 1 and pointer 18 and the scale may include numerical values as shown to provide means for visually approximating the magnitude of web tension changes.
  • the roller is returned to its zero reference point after each correction in web tension.
  • the operator adjusts web tension by reducing the speed of rollers 12 or by reducing drag on the supply roll or on drag rolls not shown, or by several of these techniques.
  • the ten sion is regulated by regulating web speed and the operator, in the given example, simply reduces web speed until motion of pointer 18 is arrested.
  • the pointer is preferably returned to its zero point and this is done by further reducing web speed until the pointer returns to its zero point. Web speed is then adjusted as required to maintain the pointer at its zero reference point.
  • a control motion can easily be derived from motion of any portion of the Z bar assembly.
  • This motion can be used directly, such as by mechanical linkage, to control web tension, such as by adjusting web speed as described above.
  • a transducer is utilized to change the mechanical motion into a signal, such as a pneumatic or electrical signal, which is utilized in a conventional manner to regulate web tension.
  • sprocket wheel 21 may comprise a rheostat controlling the speed of driven rollers 12.
  • conventional control means are useful to control web tension from a signal derived from motion of an element of the Z bar assembly. It will be further understood that such conventional controls include means to adjust the rate of change in web tension in response to a rate of change in motion.
  • the horizontal biasing force applied by pistons 15 can, of course, be applied by other means such as by springs, and at other locations such as at lower arm 7 or member 3.
  • the biasing force can be applied to members 3 at a point midway between pivot points 5 and 8 to obtain a purely horizontal biasing force. It is preferred, however, to locate the biasing means remote from roller 1 to provide free access to the roller and a short piston stroke.
  • the tension regulating device described in FIG. 1 can also be used to regulate web tension in a winding operation in a manner which will be substantially selfexplanatory.
  • the web will be fed as a continuous sheet from the leftin the sense of the drawings and wound into a core located to the right in the sense of the drawings.
  • a winding apparatus of this type is shown in FIG. 3.
  • the Z bar tension control assembly 30 is constructed in the same manner as that in FIG. 1 and comprises upper pivot arm 31, lower pivot arm 32, member 33 linking the pivot arms, and roller 34 mounted for rotation on member 33 midway between the pivot points for arms 31 and 32.
  • the web is drawn generally to the right through isolating driven nip rolls 34 in the sense of the drawing as a roll 35 of the web is being wound on driven core 36.
  • a plurality of air cylinders 37 apply a biasing force to roller 34 to the right in opposition to the horizontal force induced to the left by tensions in the moving web thus providing for web tension control by regulation of web winding speed, by the speed of drive nip rolls 34, or both.
  • the web is guided around roller 34 with 180 wrap by means of conventional guide rollers 38, 39.
  • Tension is regulated as described in connection withthe unwinding device of FIG. 1, a pointer 18' being provided, for example, to indicate motion of roller 34.
  • the pointer assembly is conveniently constructed as shown in FIG. 2.
  • the winding device shown in FIG. 3 also includes a lay-on roll assembly 200 which sill be described on more detail ments.
  • the tension in moving fibers, wires, ropes, yarns and the like can be regulated by the 2 bar device as well as webs such as sheets of plastic, paper, metal foil, and the like.
  • the invention is particularly suited to control the tension in moving webs of plastic, paper or laminations of these materials and is free from several of the disadvantages of the devices used heretofore for this purpose.
  • the device is particularly suited to web unwinding or winding operations which are described in more detail below in connection with splicing and lay-on rolls according to the invention useful, respectively, in these operations.
  • a splicing roll assembly according to the invention is indicated as 100 in FIG. 1, and comprises a pair of Z barassemblies 101, one only being shown in the drawing including a first upwardly extending pivot arm 102,
  • roller axis being located symmetrically of the mid point of a line connecting pivot points and 106.
  • the roller axes are preferably located on said line and conveniently located at pivot points 105 and 106.
  • the rollers are preferably of equal mass and mounted symmetrically such that the Z bar assembly is balanced.
  • the assembly is balanced and will assume any given horizontal position under static conditions. Due to the pivot type support, the rollers are very easily moved to the lefi or right in a direction normal to the roller axis for assisting in the movement of the web 10 relative to roll 11 of the web material.
  • the 2 bar assembly 100 shown in FIG. 1 is used for splicing.
  • a conventional turret unwinder is utilized to index a fresh web roll into an unwinding position occupied by roll 151 in FIG. 1.
  • the splicing roll is then moved to the left in the sense of FIG. 1 to engage the trailing edge of an unwound web roll with the rotating web of the fresh web roll.
  • the web from the fresh roll is thus spliced onto the trailing end of the web from unwound roll 1 1.
  • a fresh roll 151 is in position to be spliced onto the trailing end of an unwound web roll 11.
  • the Z bar web splicing roll assembly includes means, such as a double acting air cylinder 109 capable of moving the splicing roll 107 to the left in the sense of FIG. 1 to engage the trailing end of the unwinding web from roll 11 with the rotating periphery of the fresh roll 151.
  • the inner surface of the leading end of the fresh roll is temporarily secured, for example by adhesive, to the subadjacent web surface and the outer surface of the leading end of the fresh roll, or the adjacent surface of the trailing end of the unwound roll, or both, is provided with means, such as a pressure-sensitive adhesive, to join the webs.
  • the turret unwinding device 150 includes variable speed motors (not shown) to drive the roll cores 152 and 153 counterclockwise.
  • Fresh roll 151 is indexed into position for splicing as shown in FIG. 1 by rotating arm 155 clockwise about shaft 156 by a motor not shown.
  • unwound roll 11 which is mounted for rotation on shaft 157 on the other end of arm 155, rotates clockwise into the position shown in FIG. 1, with web 10 passing over one of two guide rollers 158, 159 rotatably mounted on arm 160 positioned at right angles with respect to arm 155.
  • Guide rollers 158,159 guide the web from the core to splicing roller 107 away from central supporting shaft 156 of the turret unwinder.
  • the pressure sensitive adhesive between the engaged sheets effects the splice and a knife 161 can be employed if desired to sever the trailing end of the unwound roll.
  • the knife can be mounted in any convenient manner and may be rotatably mounted adjacent or at the axis of splicing roll 107.
  • air piston 109 is actuated to move splicing roll 107 to the right and the 2 bar guide roll assembly 101 is positioned such that roller 107 is out of engagement with 'roll 151 during the unwinding thereof.
  • the core of unwound roll 11 is removed from arm 155 and replaced with a fresh roll.
  • This fresh roll is ultimately indexed into the splicing position occupied by roll 151 in FIG. 1 and the latter is simultaneously indexed into the position occupied by unwound roll 11, thus completing a splicing sequence.
  • the system is then in readiness for a further splicing sequence for continuous unwinding.
  • a lay-on roll assembly is shown in FIG. 3 as 200 and comprises a pair of Z bar assemblies 201, one only being shown in the drawing similar in configuration to the splicing roll assembly 101 shown in FIG. 1, including a first upwardly extending pivot arm 202, a second downwardly extending pivot arm 203 and a member 204 connected to the pivot arms at first and second pivot points 205 and 206.
  • a dual acting air cylinder 207 is pivotally connected to a fixed frame support 207 and to lower pivot arm 203 of each Z bar 201 to move the roller 208 and roller 209 to the right and left in the sense of the drawings in a direction normal to the roller axes in the same manner as the splicing roll assembly 100 in FIG. 1.
  • the web 10' is being wound on a roll 35 rotatably driven in a counterclockwise direction on core 36 rotatably mounted on arm 251 of a conventional turret winder 250.
  • Web 10 is guided from the Z bar tension unit 30 by means of roller 39 underneath roll 209, over lay-on roll 208 and forms a nip with the lay-on roll and a fresh core 211 driven by a motor (not shown) at web speed.
  • the web is guided around core 211 by means of guide .roll 276 forming part of an enveloping cutter assembly 275 to be described in more detail below.
  • the web then passes over guide roller 210 and to the wound roll 35.
  • arm 251 of conventional turret winder 250 is rotated counterclockwise to index wound roll 35 and a fresh core 211 into the positions shown in FIG. 3, with rollers 276 and 210 engaging the web as shown.
  • Air cylinders 207 are then actuated to force the Z bar assembly to the right in the sense of FIG. 3 to form a pressure nip between lay-on roll 208 and the fresh core 211.
  • the enveloping knife system 275 is actuated in sever the -19 web 10' and to envelop the several leading end of the web further about the fresh core to initiate a new roll.
  • the knife mechanism is then withdrawn, full roll 35 replaced on arm 251 by a fresh core, and the layon roll is moved to the left to any desired degree by the action of air cylinders 207. Due to the balanced and low friction support of the 2 bar lay-on roll assembly, it can be very easily urged against or away from the web roll during winding as desired. For example, it can be urged against the roll to form a tight inner roll portion and progressively relaxed as the roll is wound. Alternatively, the rolls canfloat" free of any external influence,
  • the layon roll When a roll is nearly fully wound, the layon roll will be displaced to the left of the position shown in FIG. 3 and, at that time, the turret winder is indexed counterclockwise to the position shown in FIG. 3. The lay-on roll is then moved to the right to form a pressure nip with a fresh core thus completing a. winding sequence. It is a feature of the present system that the lay-on roll is quickly moved easily from its full wound to its start wind position and is also capable of being easily precisely located at any position during winding. The system thus provides an efficient system for continuous web winding.
  • the enveloping web cutter 275 shown in FIG. 3 is a preferred web winding cutter.
  • the cutter comprises two principal elements: a roller 276 and a knife 287.
  • Roller 276 is positioned with its axis parallel to the axis of lay-on roll 208 and mounted for rotation adjacent the ends of arms 277 pivotally secured to side frames 278 at a pivot 279 for motion in a plane transverse to the roller axis under the influence of air cylinder 280 and linkages 281, 282.
  • each arm 277 is located at each side of the apparatus outside of the web path. Arm 277 is moveable about pivot 279 from the extended position shown in FIG.
  • a knife arm 284 is pivotally mounted on each arm 277 at pivot 285 and is moveable under the action of air cylinder 286 to move a knife blade 287 from its retracted position shown in FIG. 3 along path 288 to cut the web 10' and to pass over and in close adjacency with fresh core 211 to guide the leading end of the cut web about the core.
  • the underneath surface of the knife blade may be provided with suitable means, such as a brush, to assist in engaging the web and core. The enveloping action caused by the knife has been found sufficient to effectively initiate a new web roll without an adhesive.
  • the unwinding and winding systems described above may be readily integrated. After a web is unwound, the web is processed in some manner, such as by a chemical or physical treatment, including coating, irradiating, heating, and the like, or by being laminated to a second web. In any event, it is frequently desirable to wind the processed web.
  • the unwinding and winding system would therefore include: an unwinding stage including a Z bar splicing roll or Z bar unwinding tension regulating device or both according to the present invention; means for processing the unwound web; and a winding stage including a Z bar winding tension regulating device, a Z bar lay-on roll, or both, according to the present invention.
  • the web processing means is or may be conveniently isolated from either or both the winding and unwinding stages by means of driven nip rolls.
  • a web guide roller assembly for assisting in the movement of a web relative to, a roll of the web material comprising:
  • each pivot arm of the pair supporting one of said guide roller support members, said pivot arms being pivotally secured to said guide roller support member at a first pivot point and to a fixed support at a point higher than said first pivot point;
  • each pivot arm of the pair pivotally supporting one of said guide roller support members said pivot arms being pivotally secured to said guide roller support member at a second pivot point and to a fixed support at a point lower than said second pivot point;
  • a pair of web guiding rollers mounted for rotation adjacent the first and second pivot points having their roller axes transverse to the direction of motion of the moving web and located symmetrically about a point midway on a line between the first and second pivot points;
  • said first and second pivot arms being of equal effective length and guiding said guide roller support member formation in a vertical plane transverse to said roller axes;
  • roller support member to move one of said web guide "rollers against the outer surface of said unwinding web to urge the unwinding web against the web in said fresh web roll to splice the webs for continuous unwinding.
  • a web guide roller assembly according to claim 5 furtherincluding knife means to sever the trailing end of the unwinding web.
  • a web guide roller assembly according to claim 1 for winding a web further including: means for i rotatably mounting a web roll core; and means for guiding the winding web in contact with said pair of web guide rollers.
  • a web guide roller assembly according to claim 7 for continuously winding a web into a plurality of web rolls further including: means for positioning an empty web roll core in adjacency with a surface of the winding web; and means for moving said guide roller support member to move one of said web guide rollers against the other surface of said winding web to form a pressure nip between the winding web and the empty web core.
  • a web guide roller assembly according to claim 8 further including knife means to sever the winding web.
  • a web guide roller assembly according to claim 9 further including means mounted on said knife means to guide the severed leading end of the winding web around the empty core to initiate winding a web roll on said core.
  • first pivot arm supporting each of said roller support members pivotally secured to said roller support members at a first pivot point and to a fixed support at a point higher than said first pivot point;
  • roller being mounted for rotation adjacent a line through said first and second pivot points;
  • said first and second pivot arms being of equal effective length and guiding said roller support member for motion in a vertical plane transverse to the roller axis, whereby a point midway of a line connecting said first and second pivot points is moveable in a purely horizontal path substantially normal to the roller axis.
  • said tension regulating means comprises said 2 bar assembly, said roller being mounted at a point midway on a line between said first and second pivot points, said Z bar assembly further including: means to guide the moving web into contact with said roller in such a way as to apply a horizontal force against said roller in a first direction normal to the roller axis; means for applying a pre-determined force against the roller substantially normal to the roller axis in a horizontal direction opposite to said first direction whereby the roller moves in said purely horizontal path in response to web tension relative to said pre-determined force.
  • said splicing roll means comprises said Z bar assembly, said assembly including: a pair of rollers mounted for rotation with the roller axes symmetrical about a point midway on a line connecting cal about a point midway on a line connecting said first and second pivot points; means to guide a winding web in engagement with said rollers; and means to move said rollers to urge a winding web against an empty web roll core to form a pressure nip for winding a web roll in said core.

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  • Tension Adjustment In Filamentary Materials (AREA)
  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Replacement Of Web Rolls (AREA)
US83730A 1970-10-26 1970-10-26 Winding,unwinding and tensioning apparatus Expired - Lifetime US3692251A (en)

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US8373070A 1970-10-26 1970-10-26

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US3692251A true US3692251A (en) 1972-09-19

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JP (1) JPS5148545B1 (enrdf_load_stackoverflow)
CA (1) CA949948A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452565A (en) * 1981-12-21 1984-06-05 United Technologies Corporation Containment structure
US4475864A (en) * 1981-12-21 1984-10-09 United Technologies Corporation Containment structure
FR2555507A1 (fr) * 1983-11-30 1985-05-31 Taiyo Tekko Kk Presse rotative pour l'impression de formulaires de commerce
AU657611B2 (en) * 1993-04-14 1995-03-16 Reelex Packaging Solutions, Inc. ACC 300 accumulator system
US5413264A (en) * 1990-12-24 1995-05-09 Windings, Inc. Serial accumulator system for filamentary material
US6719240B2 (en) 2001-11-13 2004-04-13 Kimberly-Clark Worldwide, Inc. System and method for unwinding tissue webs
US6722606B2 (en) 2001-11-13 2004-04-20 Kimberly-Clark Worldwide, Inc. System and method for simultaneously unwinding multiple rolls of material
US6820837B2 (en) 2002-12-20 2004-11-23 Kimberly-Clark Worldwide, Inc. Unwind system with flying-splice roll changing
US9938114B2 (en) * 2012-12-21 2018-04-10 Sms Group Gmbh Method and device for winding a metal strip
CN111532008A (zh) * 2020-05-16 2020-08-14 江苏卡普丹建筑装饰科技有限公司 一种a2级防火金属覆膜装饰板生产线及其生产工艺

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS532009U (enrdf_load_stackoverflow) * 1976-06-25 1978-01-10
JPS5571825U (enrdf_load_stackoverflow) * 1978-11-13 1980-05-17

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4452565A (en) * 1981-12-21 1984-06-05 United Technologies Corporation Containment structure
US4475864A (en) * 1981-12-21 1984-10-09 United Technologies Corporation Containment structure
FR2555507A1 (fr) * 1983-11-30 1985-05-31 Taiyo Tekko Kk Presse rotative pour l'impression de formulaires de commerce
US5413264A (en) * 1990-12-24 1995-05-09 Windings, Inc. Serial accumulator system for filamentary material
AU657611B2 (en) * 1993-04-14 1995-03-16 Reelex Packaging Solutions, Inc. ACC 300 accumulator system
US6719240B2 (en) 2001-11-13 2004-04-13 Kimberly-Clark Worldwide, Inc. System and method for unwinding tissue webs
US6722606B2 (en) 2001-11-13 2004-04-20 Kimberly-Clark Worldwide, Inc. System and method for simultaneously unwinding multiple rolls of material
US6820837B2 (en) 2002-12-20 2004-11-23 Kimberly-Clark Worldwide, Inc. Unwind system with flying-splice roll changing
US9938114B2 (en) * 2012-12-21 2018-04-10 Sms Group Gmbh Method and device for winding a metal strip
CN111532008A (zh) * 2020-05-16 2020-08-14 江苏卡普丹建筑装饰科技有限公司 一种a2级防火金属覆膜装饰板生产线及其生产工艺

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JPS5148545B1 (enrdf_load_stackoverflow) 1976-12-21
CA949948A (en) 1974-06-25

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