Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
  • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
  • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
  • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
  • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard
  • B31F1/2831—Control
  • B31F1/2836—Guiding, e.g. edge alignment; Tensioning
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
  • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
  • D06C3/06—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics by rotary disc, roller, or like apparatus
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
  • D06H3/00—Inspecting textile materials
  • D06H3/08—Inspecting textile materials by photo-electric or television means

Definitions

• the invention relates to an alignment apparatus and a method thereof for bonding plural layers of webs, and more particularly to an apparatus and a method to align the position of web being supplied into double facing unit(double backer) so as to produce multi-layer board comprised of bonding plural layers of webs, such as corrugated board.
• multi-layer board such as corrugated board is a raw material of enhancing shock-absorbing, heat insulation or durabilities depending upon deformation profiles thereof by bonding three or more papers or boards, which is formed by sticking them together with adhesive or by heat adhesion method and is normally said as corrugated board or web of corrugated board.
• the corrugated board is widely used as the packaging material. Depending upon the application and using environments, single wall corrugated board, double wall corrugated board and the like are used. In some cases, triple wall corrugated board may be used.
• a process of unwinding and sending paper in the shape of roll into a corrugating machine in which the flute formation is made, and then discharging after putting and sticking another roll paper to one side of the flute tips is called as a single face web manufacturing process.
• a process of adhering liner roll paper to the other side of this single face web or a process of adhering liner roll paper to the web after adding another single face web is called as a double face web or double wall web manufacturing process.
• the web of corrugated board is made through the two processes.
• the materials of the multi-layer board may include all types of paper such as machine glazed paper, glassine paper, normal paper, kraft paper, board paper and the like, films such as plastic film, i.e., cellophane, vinyl chloride, polyethylene, polypropylene and the like, metal such as aluminum, steel plate and the like, and fabrics such as processed fabric raw material and the like.
• paper such as machine glazed paper, glassine paper, normal paper, kraft paper, board paper and the like
• films such as plastic film, i.e., cellophane, vinyl chloride, polyethylene, polypropylene and the like, metal such as aluminum, steel plate and the like, and fabrics such as processed fabric raw material and the like.
• the reason to bond and process plural layers of paper as above is for increasing the thickness and strength or for enhancing the shock-resistance and strength such as the corrugated board.
• Such multi-layer board includes a packaging box, a beverage receptacle for milk, juice and the like, a board having a multi-layered structure, and the like.
• the laminator for bonding the plural layers of web comprises a web supply unit (10) that supplies with web, an alignment device (13) that aligns the web supplied with from the web supply unit, and a double facing unit (16) that bonds the webs aligned by the alignment device.
• the web supply unit (10) comprises a liner supply unit (11) that supplies with liner roll paper consisting of one surface of the web of corrugated board, a dryer (1 Ia) that dries the liner roll paper supplied from the liner supply unit (11), a corrugated core paper supply unit (12) that supplies corrugated medium paper, a single face web producing unit(single-facer)(12a), which is also referred to as a corrugator, that makes flute formation in the medium paper being supplied from the corrugated core paper supply unit and adheres the corrugated medium paper to the liner roll paper to form single face web and a bottom liner roll paper supply unit(14) that supplies bottom liner roll paper consisting of a outer surface of the corrugated board.
• a liner supply unit (11) that supplies with liner roll paper consisting of one surface of the web of corrugated board
• a dryer (1 Ia) that dries the liner roll paper supplied from the liner supply unit (11)
• Thealignment device(13) relates to the invention herein, which is to align two single face webs(13a, 13b) that are being supplied from the single face web producing machine (single facer) (11, 11a, 12, 12a) and another single facer of the web supply unit(l ⁇ ).
• the adhesive herein is made of starch in ingredient.
• the viscosity of adhesive is activated to stick to the bottom liner paper when heated with being pasted to the flute tips as above-mentioned, since the viscosity is activated when heating the adhesive with being melted in water.
• Thecorrugated board formed by the double facing unit(16) passes to a device (17) that scores the folding line and slits the widths at a pre-designed position, and a cutter(17a) that cuts out the length, and then is stacked by a stacker(18).
• the alignment device (13) aligns positions of the single face webs being put into the double facing unit (16) on the basis of center line or edge of each single face web.
• guiding plates are fitted to the both edge positions which the single face web passes through so that the plates can contact the both edges of the web and the alignment can be made by means of moving the guiding plates from side to side to adjust input position of the web when passes through between the plates.
• Another steeringapparatus invented to make up for the problems in the traditional way of aligning by the guiding plates is designed to incorporate about 8-10 steering rolls, made of urethane, having a diameter of 160 mm and a width of 50 mm, fitted in a row on an rotating axis and the rotating axis is provided over a center of the single face web so that it maintains 90 degree angle to an advancing direction of the web.
• a pneumatic apparatus is attached to the rotating axis so that the steering rolls can apply predetermined pressure force to the web.
• a supporting lever of the rotating axis is again connected to a steering axis that steers the rotating axis so that the steering rolls are located over the center of the advancing web so as to move the advancing direction of the web from side to side.
• a DC motor controls the steering axis.
• the steering apparatus features that both ends of the axis of the steering rolls being rotating are connected to the steering axis fixed by an extended shaft.
• the pneumatic apparatus is mounted to vertically move the steering roll axis pivoting on the connected point.
• the steering rolls press the center of the web being put in and the fixed axis connected to the controller rotates from side to side, enabling the advancing direction of the web being pulled out from the double facing unit(16) to be adjusted.
• the paper tension in pulling web is so high even with its own weights when the single face web weighs heavy or alignment is made at high speed, i.e., when the roll paper used is of heavy weight or of wide width, because a length of the web to be pulled is 20 meters or more for the web on the upper bridge that it requires to enhance the basic pressure of the steering roll pressing the center of the web for ensuring a proper steering ability.
• the steering roll is consisted of one steering axis. Accordingly, when the advancing speed of the web is high or the web weighs heavy, the force of pulling the web by the steering roll is strongly applied to the contact point (contact point between the steering roll and the web), so that the contact surface where the steering rolls press the web must be increased as much as that.
• the above-mentioned way of steering via steering rolls of single steering axis at the center of the web designed to eliminate the problems appeared in the conventional aligning apparatus by means of the guiding plates, comprises control method as follows: white/black cameras are fitted at an uniform distance away to right and left side ends towards an advancing direction of the single face web and a pair of high frequency lamps is fitted towards the cameras at the locations of rear right and left sides of the web being supplied. And then after detecting the positions of right and left edges of the web by means of taking image of brightness and darkness line shown in the camera screen, thereby the position of the web is adjusted (a model by means of cameras offered from E&L Company).
• Theobject of the invention is to solve the problems as above described in the conventional web alignment apparatus and to provide an alignment apparatus and method for bonding plural layers of webs, wherein distance measuring meters using laser beams are provided over the upper side of both ends of each webs, which are putting into a double facing unit in a process of manufacturing a corrugated board consisted of multiple roll papers, a predetermined limit is set on a traverse line from an advancing direction of the web being put in, the laser beams are consecutively illuminated within the preset limit to measure a distance of an object within the predetermined limit from the illuminating position, a surface profile of the web is recognized by data collected along the distance measuring line within the predetermined limit to calculate a position and a width of the web and position values of a center line and both side end lines of the advancing web and thereby controlling a position of the web in a real time by a manner of TCP/IP communication.
• Anotherobject of the invention is to provide an alignment apparatus and method for bonding plural layers of webs, minimizing the number of steering rolls contacting with the web to adjust a position thereof so as not to affect a quality of the web and adjusting a position of the web correctly and quickly without making any deformation in quality of the web even at the web advancing speed of 300 mpm or more.
• Still another object of the invention is to provide an alignment apparatus and method for bonding plural layers of webs, capable of minimizing a damage of web in the course of correcting a position of the web and thereby increasing an economic efficiency.
• the invention offers an alignment apparatus for bonding of multi-layer web which makes a feature of comprising a base unit that is supplied with web from a web supply unit and maintains a established height thereof ; a sensing device that senses at least one side end of the web passing through on the base unit; an adjustment device that consists of at least two pieces separated from each other, enabling to move a position of web by contacting the face thereof passing through on the base unit and by acting with a synchronized steering angle for moving web ; and a controller that makes it available to move the corresponding position of the web to base position through the adjustment device by setting a base position at a predetermined position and measuring via the sensing device at least one side end of the web passing through on the base unit.
• Thebase position features a position which a center of a traverse width of or an edge of the web passes.
• Thebase unit makes a feature of comprising a lead-in roll for preventing a damage in the underneath of the web being put in, a fixed round-bar established for maintaining constant tension against the lead-in roll and a support plate for supporting the underneath of the web towards the adjustment device.
• the sensing device consists of a laser-type distance measuring apparatus positioned at a rear end of the adjustment device and at upper ends of left and right sides of a center of the base plate.
• the sensing device comprises a light source unit that emits laser beam, a light receiving unit that receives the laser beam reflected from the web, a reflection unit having a plurality of reflectors that illuminates the laser beam of the light source unit to a traverse direction of the web being put in within a preset limit and at the same time reflects the reflected light from the web to the light receiving unit; and a sensing controller that receives, in a uniform interval within a preset limit, the reflected light of the laser beam which is illuminated in a uni-direction within a predetermined limit from the light source unit, measures distances up to the web through a time gap between the illuminated light and the received light and recognizes a surface profile of the web by arithmetic data collected along the distance measuring line to calculate a width and a position of the web.
• the controller illuminates the laser beam from the sensing device to a limited area in a traverse direction towards an advancing direction of the web being put in, receives distance data measured at a preset interval within a preset measuring limit and thus to make a measurement line and recognizes a surface profile of the web along the measurement line ; measures distances up to the both edges of the surface profile of the web from a distance center- line between the sensing devices installed on the right and left to calculate a width of the web ; and measures deflections in position with a preset alignment line according to the value calculated to determine a movement distance of the web being put in.
• the adjustment device comprises at least two steering rollers that contact the surface of the web passing through on the base unit and are separated from each other; at least two steering axes each of which steers the steering rollers, respectively; an elevation unit that adjusts a vertical position of the steering rollers; and an angle adjusting unit that adjusts a steering angle of the steering rollers, and simultaneously adjusts at least the two steering axes via the angle adjusting unit to adjust a position of the web while the steering rollers are contacting the upper surface of the web via the elevation unit by the controller.
• Thesteering rollers consist of numbers of sub-rollers that are respectively installed to at least two rotating axes and are rotating independently. And the rotating axes, consisting of at least two pieces, have a separate steering axis respectively, are connected to the angle adjusting unit and are steered with synchronized angle.
• the elevation unit consists of a pneumatic cylinder.
• the angle adjusting unit consists of a servo motor.
• the sensing device and the controller communicate with each other by means of
• the invention also provides an alignment method for bonding plural layers of web comprising the steps of:
• the alignment position for the web in the step of (a) is set by means of measuring a width of web in a traverse direction of 9O 0 C angle towards an advancing direction of the web being supplied and calculating a center line or guide line of the web.
• Thealignment position of the step (a) is aligned either by a manner of aligning an assumed center line or guide line, which is set to each of the web being supplied, with a preset base line or aligning another assumed center line with a specific assumed center line, or by a manner of aligning on the basis of side end of preset specific web out of the webs being supplied with.
• Thecalculation of the movement distance in the step of (b) is made by means of sensing side positions of the web through the surface profile of a measurement line obtained by repeatedly measuring distances to the positions of the web at a uniform interval, calculating the width of the web being supplied with by measuring distances of the sensed edge positions of the web from a center line of the base unit, and figuring out distance of the web being supplied with from a center line of the base unit or from a preset guide line after establishing a guide line.
• Thedistance is measured by means of obtaining time gaps between the illuminated laser beam and a reflected light that is reflected at a preset uniform interval in angle.
• the alignment position of each of the webs being supplied is made to be in line with a preset base position and the position of the web is to be controlled so that the web moves to the alignment position by calculating movement distance between an alignment position of the web being supplied and the base position to convert a value thereof into an angle.
• the apparatus and a method thereof for bonding plural layers of web relating to the invention offers to prevent losses of the web caused due to alignment error by providing precise and rapid real-time alignment of the each webs being supplied for producing corrugated board or multi-layered web consisted of bonding webs and by sending them to the double facing unit, to make it available to change the widths of the web in keeping the state of alignment at a normal running speed which differs from the conventional method obliged to reduce the production speed whenever width changes of the web are made, and to make increased productivity remarkably effective by providing easy operation thanks to automation.
• FIG.1 illustrates a structure of a bonding apparatus for bonding a corrugated board consisted of a plurality of webs
• FIG.2 illustrates a perspective view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.3 illustrates a side view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.4 illustrates a front view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.5 illustrates a plain view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.6 illustrates a perspective view of a steering roller related apparatus out of the alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.7 illustrates a front view of a steering roller related apparatus out of the alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.8 illustrates a
• FIG.14 illustrates an example of a method of determining a center line of abnormal web in the alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.15 illustrates an example of a method of setting a center line of the alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG.16 illustrates an example of an alignment method when different widths of papers are connected in the alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 2 is a perspective view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 3 is a side view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 4 is a front view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 5 is a plain view of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 6 is a perspective view of a steering roller related apparatus out of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 7 is a front view of a steering roller related apparatus out of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 8 is a side view of a steering roller related apparatus out of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 9 is a block diagram for illustrating a structure of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 10 is a flow chart for illustrating a control method of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 11 illustrates an example of a control method of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 12 illustrates an example of a change in adjusting angle of an adjustment roller in a control method of an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 13 illustrates an example of a method of detecting side positions of web by an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 14 illustrates an example of a method of determining a center line of abnormal web in an alignment apparatus for bonding multiple web according to an embodiment of the invention
• FIG. 15 illustrates an example of a method of setting a center line in an alignment apparatus for bonding multiple webs according to an embodiment of the invention
• FIG. 16 illustrates an example of an alignment method when different widths of papers are connected in the alignment apparatus for bonding multiple webs according to an embodiment of the invention.
• an alignment apparatus for bonding multiple webs is an apparatus for aligning double webs.
• the apparatus for aligning a position of each web are installed at upper and lower bridges as shown in FIG. 2 to FIG. 5 and each of the aligning apparatus has same structure and do same operation.
• FIG. 2 to FIG. 5 reference numerals are given to structural elements for upper bridge only.
• the structural elements without given reference numerals for the lower bridge are as same as the upper.
• (90) is supplied from a supply unit (10), as shown in FIG. 1.
• the base device comprises a lead-in roll (37) that is mounted to a front end of the supply unit so as to make rotation possible, a fixed roll (37a) that supports the web passing the lead-in roll (37) and a base unit (35) that supports the underneath of the web (90) passing the fixed roll (37a).
• Andguiding units (32, 33) that makes a position of the web adjustable by means of manual operation are installed at a rear end of the base unit (35).
• the guiding units (32, 33) are provided on the upper and lower bridge separatedly and guide blocks having interacting movement are mounted at both side ends of the guiding unit.
• the guide blocks are designed to simultaneously move right and left while keeping a same distance away from the center line to a traverse direction of the web by a concentric axis connected to both guide plates.
• Each of the sensing units (62, 64) consisting of a laser-type distance measuring device comprises a light source unit that emits laser beam; a light receiving unit that receives the laser beam reflected from the web; a reflection unit having a plurality of reflection plates that illuminate the laser beam of the light source unit to a traverse direction of the web being put in within a preset limit and at the same time reflect the reflected light from the web to the light receiving unit; and a sensing controller that receives, in a uniform interval within a preset limit, the reflected light of the laser beam which is illuminated in a uni-direction within a predetermined limit from the light source unit, measures distances up to the web using a time gap between the illuminated light and the received light and recognizes a surface shape of the web by arithmetic data collected along the distance measuring line to calculate a width and a position of the web.
• the controller which controls a position of the web (90) passing the base unit (35) by using the sensing units(62, 64) measures distance in a perpendicular direction towards an advancing direction of the web (90), i.e., towards an axis direction of the lead-in roll (37) and the like at a preset interval within a preset measurement limit for the edges of the web via the sensing units (62, 64), recognizes width and position of the web calculated by means of time gaps between the illuminated light and the reflecting light received, makes a guide line of the web thereon and moves the position of the web to a base line via the adjustment unit so that the guide line is in line with the preset base line.
• the measurement line (the measurement line means shapes as like 62a, 64a shown in
• FIG. 11) along the distances can be made by receiving the laser beam, which consecutively illuminates from the light source unit to a traverse direction of the web (90) being put into the base unit (35), at a constant interval. From this, with eliminating the measurement line of any object being deviated from distances preset between a passing line of the web (or alignment line, i.e., a measurement line of the laser beam formed at a height which the web passes, i.e., on an upper surface of the web passing through on the base unit) and the sensing units (62, 64), a surface profile of the measurement line reflected from the upper surface of the web can be figured.
• the width of the web can be calculated by substituting the measurement line via the sensing units (62, 64), i.e., the edge position of the web (90) for the preset distance between the sensing units (62, 64), i.e., base position (C 0 ), which is set at a center position of the preset distances between the sensing devices(62, 64), namely Li and L 2 as shown in FIG.15. Then, if the calculated width of the web is divided into two equal parts, a position of the center line of the width of the web (90) can be calculated. [91] In other words, as shown in FIG. 15, the sensing units (62, 64) measures a distance to the web (90) at a uniform interval of angle (for example, at 0.
• the edge position can be measured by using the measured angle A 2 as follows.
• a distance from the center (C 0) to the vertical illumination line of the laser beam of the sensing unit(62) shown in left of FIG. 15 can be obtained from a sine value of the measured distance (L) by the measured angle A 2 to the distance L 1 , which is obtained by dividing the distance between a pair of sensing units (62, 64) into two equal parts.
• the left edge position of the web is a distance obtained by adding dL to the distance Li, and the dL is calculated from Sine(A 2 )L.
• a distance from the center (C 0 ) to the vertical illumination line of the laser beam of the sensing unit (64) shown in right of FIG. 15 can be obtained from a sine value of the measured distance (L) by the measured angle A 3 , in the same way as measured angle A 2, to the distance L 2 which is obtained by dividing the distance between a pair of sensing units (62, 64) into two equal parts.
• the right edge position of the web is a distance obtained by deducting dL from the distances L2, and the dL is calculated from Sine(A 3 )L.
• FIG. 15 are away same from the center and are illustrated to give an example whether the laser beam of the sensing units (62, 64) goes beyond the vertical line or not.
• the center line of the web can be obtained if dividing the both edge positions, which are calculated as described above, into two equal parts. It makes to move the web to be adjusted to the center line of the web in line with the center line of the base unit (35).
• the adjustment device comprises a pair of steering rollers (40) that contact upper surface of the web (90) passing through on the base unit (35); a pair of arms (42) to which the axis of the steering rollers (40) are respectively mounted; a pair of steering axes (50) that turn the arms (42); a pair of frames in adjustment device (46) that are mounted to both side ends of the frame(20); first and second cross members (45a, 45b), which are mounted on the front and the rear of the respective frames in adjustment device (46), movable upwards and downwards through vertical guides (47); an elevation member (48) that vertically moves the first and second cross members (45a, 45b); a pair of elevation actuators (55) that vertically move the elevation member (48); a pair of steering members (43) that are connected to one end of each steering axis (50) toward the second cross member (45b); a steering cross bar (44) that is connected to one end of each steering member (43); and an angle adjusting
• the adjustment device in the invention consists of two pieces separated from each other so as to contact both sides of the web, resulting to reduce the change in adjusting angle and to have the position adjusted enough by reduced friction with the web.
• Andthe steering rollers (40) consist of two sets and are mounted on a perpendicular line to the advancing direction of the web (90).
• each ofthe steering rollers (40) consists of several sub-rollers (for example, four) that are fitted to one rotating axes to be freely rotatable.
• each of the steering rollers (40) to be consisted of several sub- rollers is to have each of the sub-rollers freely rotatable when the angle adjustment is made by the angle adjustment unit (52), enabling to prevent the twist of the web being contacting and advancing.
• the rotating axes of a pair of steering rollers (40), which are separately connected to each steering axis, are designed to be connected to the steering members (43) so that they are steered at a synchronized angle each other.
• Andthe elevation actuator (55) consists of a pneumatic cylinder.
• a pneumatic line for driving the pneumatic cylinder consists of a compressor (80) and an air chamber (82), as shown in FIG. 9, so that it is running by compressed air supplied with keeping at a constant pressure.
• Theangle adjusting actuator (52) consists of a servo motor.
• the controller (60) receives a feedback from the servo motor, recognizes a present position as an angle and thereby control an angle adjustment as much as required.
• a position (elevation height) of the elevation actuator is adjusted by a position adjusting screw (located just beside the connection place of 48 with 55) depending upon a thickness of the single face web.
• a measurement upper limit distance (UL) and a lower limit distance (LL) should be set.
• the web (90) keeps in a close contact condition, i.e., a flat state with the base unit
• an edge distance of the web (90) is measured as S N (Since the measurement distance is beyond the lower limit distance (LL) when it just pass over the edge position, the distance measured just before passing over the lower limit distance (LL), i.e., the position of measuring S N is determined as a position of a side end.), where a position of the edge is recognized.
• the controller (60) measures a deviation distance (dW) of both edges of the web by means of the laser beam via the sensing units (62, 64), as same as explained in the description on the sensing units (62, 64), and thereby determines a position of a measurement center line (C m ), which is an actual center line of the web (90), on the basis of the assumed center line (C 0 ).
• the steering roller (40) is to be adjusted to an angle A or an angle -A (S 17, S 171), as shown in (A) of FIG. 12 or (B) of FIG. 12.
• the web (90) may be supplied with as in a condition of one side being torn or damaged as shown in FIG. 14, unlikely in a normal condition, or as in a condition that different widths of webs are connected as shown in FIG. 16, which means remarkable change of the web widths as like the case when the web (90) having a narrower width is connected to wider width web (90) as shown in (A) of FIG. 16 or the web (90) having a wider width is connected to the narrower width web (90) as shown in (B) of FIG. 16.
• the web may be kept in moving forwards for a predetermined period of time under the advancing condition as like just before (desirably, keeping in a straight advancing condition), resulting to leave as it is without adjustment for the relevant area of the web to maintain the normal advancing condition.
• the position of the web may be adjusted by comparing the assumed side end position of the web with the position of the side end actually measured.
• the position of the web is adjusted by comparing the center lines as described above, even though the web is being supplied with in a condition of any one side end being damaged, the position is adjusted by using the assumed center line and the measurement center line to bond the webs, resulting to minimize the area of bad qualities in the web bonded.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Replacement Of Web Rolls (AREA)
• Treatment Of Fiber Materials (AREA)
• Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
• Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

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• 2008
  • 2008-04-28 KR KR1020080039292A patent/KR100852257B1/ko active IP Right Grant
  • 2008-08-28 WO PCT/KR2008/005050 patent/WO2009133992A1/en active Application Filing
  • 2008-08-28 JP JP2010528786A patent/JP4841694B2/ja active Active

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