FI93437B - Apparatus and method for cutting and winding a paper web - Google Patents

Description

93437

Apparatus and method for cutting and winding a paper web. - Anordning ochförfarande för kapning ocppinding av en pappersbana.

The invention relates to an apparatus and a method for cutting a moving paper web to be wound on a spool and transferring the web to an empty spool as the web continues to move.

It is common practice in the paper industry to form a continuous paper web that is wound on large spools. In order to achieve continuous operation, it is, of course, necessary to have a system that immediately switches the winding of the paper web from a full roll to a blank roll, especially in paper production operating at modern speeds. U.S. Patent 2,461,246 discloses a method of feeding a strip to a rotating empty roll core and threading the strip helically over said core as it tightens tightly across a moving web of paper and cuts the paper, thereby guiding the cut edge onto the empty roll supported by the cut strip. Subsequent improvements have been made in methods of tightening the tape for cutting and feeding, and in the use of various types of tapes, as disclosed, for example, in U.S. Patent 4,414,258, which discloses a reusable paper web woven into a web that does not interfere with the papermaking process. is waste and is recycled. The most recent improvement is disclosed in my U.S. Patent 4,659,029, which discloses the use of a re-fibrous paper fiber web in an elongate guide path to direct the web under a moving paper web and to direct the web to a blank spool nip and begin rewinding to the blank spool.

93437 2 It is an object of the present invention to provide an improvement in the supply of tape to an empty spool. Another function is to provide a system that can be operated remotely to avoid the possibility of interfering with the movement of the paper web. Another task is to arrange the adhesive under the paper to be cut with the cutting tape before it enters the guide bus. Other tasks will be apparent from the following more detailed description.

The device according to the invention is characterized by the things set forth in the characterizing part of claim 1.

The method which is the subject of the invention is characterized by the things set forth in the characterizing part of claim 11.

The novel features of the invention are set out in particular in the appended claims. However, the invention itself, both in terms of its system and mode of operation, with its other functions and advantages, will be best understood by reference to the accompanying description taken in conjunction with the accompanying drawings, in which:

Figure 1 shows a perspective view of a roll system used in the paper industry for winding a paper web onto rolls and a new apparatus for transferring the leading edge of a web to a blank roll in accordance with the present invention.

Figure 2 schematically shows a first embodiment for applying an adhesive to a cutting strip.

Figure 3 schematically shows another embodiment for applying adhesive to a cutting tape.

Figure 4 shows a cross-section along the line 4-4 in Figure 1.

n 3 93437

Figure 5 shows a plan view of a cutting strip according to the invention.

Figure 6 schematically shows a third embodiment for applying adhesive to a cutting tape.

Figure 7 shows a plan view of a double-sided adhesive tape used in the invention.

Figure 8 shows a side view of the strip of Figure 7.

Fig. 9 schematically shows a fourth embodiment for applying the adhesive to the cutting tape.

Figure 10 shows a cross-section along the line 10-10 in Figure 9.

Fig. 11 shows a perspective partial view with different fastening means for feeding the cutting strip into the nip.

The general features of the invention are best seen and best understood in Figure 1, which shows a device of the general type used to roll paper produced in a paper mill into a roll for storage and use elsewhere. The continuous paper web 20 moves at a relatively high speed to the spool assembly, after which the paper is rolled. Paper web 20 advances toward tension roll 21 which is mounted on the brackets 22 of the bearing points, resulting in a 24 around the web 20 on the drive roller 23 to rotate and the coil, the coil rotates in the direction of the arrow 25. The drive pulley 23 rotates in the direction of the arrow 26 and is pressed against the paper roll on the reel 24, causing it to rotate in the direction shown. When the coil 24 is the desired amount of the paper web 4 93437 20, it is necessary to cut web 20 in the transverse direction, transfer the cut edge to an empty spool 27, and start the web winding on that spool in the direction of arrow 28, to again bring a new full reel spool 24, respectively. The empty spool 27 is positioned vertically above the location shown in Figure 1 until it is ready to receive paper from the web 20 and begin winding it.

The coil 27, which may be rotated separately in a known manner, is lowered until it contacts and rotates with the drive roller 23, as shown in Fig. 1. The cut edge of the web 20 is then inserted into the nip 29 between the empty spool 27 and the drive roller 23, which causes the cut edge to be wound on the spool 27 and the paper web to be transferred to the spool.

The apparatus of the invention generally includes means for feeding the cutting tape 30 to one end of the empty spool 27 and causing the tape to rotate helically around the spool 27 to break the tape 20 and cause the truncated edge to roll and rotate around the spool 27. The storage of the cutting strip 30 is preferably on a movable drum 31 in a housing 32, which housing further supports a cutting member 33 which at a suitable moment cuts the belt 30 coming from the large storage on the drum 31. It can be seen that only a certain length of strip greater than the width of the strip 20 is needed to cut the web 20 in the transverse direction and cause the cut edge to rotate on the empty spool 27, and thus the strip 30 is cut at a suitable location and the strip is needed only after the spool 27 is filled with paper and must be replaced with another empty spool. The strip 30 passes through the cutting member 33, the adhesive application member 39 (which member is shown outside the housing 32 for purely drawing reasons and is preferably located in the housing 32, as will be apparent to those skilled in the art) and the guide 5 93437 to the bus 34 by a drive member, e.g. to cause the free end of the strip 30 to move across the entire width of the web 20 below the web in the guide passage 34 until it reaches the second end 36 where the free end 37 of the strip 30 is ready to be fed to the nip 29, the spool 27 and the drive roller 23. As can be seen in Figure 5, the adhesive tape 38 is applied to the front end 37 of the tape 30 so that when fed to the nip 29 it adheres to the surface of the empty coil 27. In a preferred embodiment, the mechanical arm 40 is mounted on a base 41 and has a grapple 42 that engages the strip 30 and is instructed to extend the grapple 42 toward the nip 29 until the strip 30 engages the nip 29 and adheres to the surface of the empty coil 27. The frictional resistor is then applied to the strip 30 near the initial end 44, e.g.

This apparatus and method are disclosed in co-pending U.S. Application Ser. 07 / 087,874, filed August 21, 1987, which will soon become a U.S. patent.

Fig. 2 schematically shows a first embodiment of the adhesive applicator 39 of Fig. 1. The cutting strip 30 is located in the channel guide 43 anywhere between the cutter 33 and preferably the beginning 44 of the elongate main guide bus 34. An opening 45 in the channel 43 exposes the center of the lower surface of the strip 30. The roll 46 is preferably rotatably mounted so that its outer surface is in the opening 45 while its outer portions are embedded in the liquid adhesive 47 in the container 48. Above the strip 30 vertically aligned with the opening 45 is a pressure roller 49 mounted on arms 50 which optionally moved from the extended upper position 51 (shown in broken lines) to the lower compression position shown in solid lines in Figure 2. In the compression position, the tape 6 93437 30 is compressed downwardly in contact with the roll 46 which causes shown by reference numeral 38 in Fig. 5. The tape 38 is located inwardly from the side edges of the tape 30 so that the adhesive does not come into contact with the guide passage through which it passes, as will be described in more detail later. Figure 3 shows another embodiment of an adhesive applicator. The tape 30 passes through a channel guide 52 having an opening 53 in the lower surface to expose the tape 30 to spray nozzles 54 spraying adhesive 55 onto the tape 30. In one version of this system, the cutter 33 is located immediately in front of the opening 53 so that when the previous strip 30 is cut can be applied to form an adhesive coating tape immediately behind the cut-off point and thus form a front end 37 (see Figure 1) for the next strip of tape 30 to be used to cut the tape 30 and spin it onto an empty spool 27. In another version, the tape 30 is moved to moving the tape through the elongate main control bus.

Figure 4 shows a preferred guide bus structure 34 for use with an adhesive applicator that applies adhesive to the lower surface of the strip 30 as in Figures 2, 3 and 6. The purpose of applying adhesive to the lower surface of the strip 30 is to use a certain mechanical arm structure 40 with telescopically extending grooves 42. it is easier to fit the strip 30 in the gripper 42 towards the adhesive side of the gripper 42, so that it can be fed into the nip 29 with the adhesive side upwards for gripping the empty coil 27. Other types of mechanical arms with other movements of the grapple 42 may possibly be used with the adhesive surface facing upwards in the guide bus 34. More important in papermaking is that the machine side is the closest side where the housing 7 93437 32 and the reel 30 of the strip 30 are located on the other side. to use rollers and the like.

Filling the spool 31 with tape, adding glue to the container 48, and the like from the front will improve the efficiency of the disclosed system and greatly increase its operational safety. The guide bus 34 has an internal channel 56 with a rectangular cross-section which allows the strip 30 to slide longitudinally. The elongate groove 57 is parallel to the duct 55 and is between the duct 55 and the outside air. Once the strip 30 is captured on the nip 29 and begins to rewind to the empty spool 27, the strip 30 is pulled transversely out of the channel 55 through the groove 57 and thus provides the frictional resistance necessary to cause the strip 30 to wound helically around the spool 27 to cut the web 20 and begin cutting. in the present invention, when the bottom surface of the strip 30 is coated with adhesive 38, it is necessary to provide a recess 58 below which is as wide as the adhesive coating 38. In this way, the strip 30 can slide through the guide passage 34 in the channel 55 without the adhesive coating gripping the guide passage. 34. A further feature is a resilient flap cover 59 held in place by a spring retainer 60. The flap cover 59 keeps the dirt out of the channel 55 and nevertheless flexes upward and does not prevent the strip 30 from exiting through the groove 57 when it occurs during cutting of the paper web. In addition, the flap cover 59 provides protection against paper web 30 particles and moisture as it travels through the guide passage 34.

Figure 5 shows a coated strip 30 with the adhesive applied to the front end 37. It can be seen that the side edges 61 are not covered with the adhesive and thus can be used to support the strip 30 as it slides in the channel 56, as clearly shown in Figure 4.

8 93437

A third embodiment of the adhesive application member of the tape 30 is shown in Figures 6-8. The strip 30 is supported in a channel 62 with an opening 63 for exposing the lower surface of the strip 30. The downward pressing roller 64 maintains a small downward pressure in the strip 30 above the opening 63. The storage mandrel 65 supports a roll of double-sided pressure-sensitive tape 66 having a continuous release liner 67 and a plurality of pressure sensitive adhesive snippets, preferably separated from successive snippets 68 by a short portion 69 with no release liner 67. The strip 66 is fed from a roll 65 to a pressure roller 70 rotatably mounted on arms 71 which can move from a lower inoperative position 72 (dashed lines) to an upper operative position shown by solid lines. As the tape 66 passes between the roll 70 and the tape 30, the adhesive portion 68 is pressed against the tape 30 while the release tape 67 is wound on the spool 73.

Once the adhesive piece 68 is applied to the tape 30, the arms 71 move to the inoperative position 72 and the roller 65 stops until needed again. The roll 65 is shown as a drive spool 73 driven by a belt 74. It will be appreciated that double sided adhesive may simply be perforated instead of spaced, in which case the subsequent adhesive piece 68 is separated from the adhesive piece 68 applied to the tape 30 due to the advance of the tape 30. to position 72.

Figures 9 to 10 show a fourth embodiment for applying the adhesive to the tape 30, in which embodiment a double-sided pressure-sensitive tape 66 similar to that shown in Figures 7 and 8 is used. The pressure roller 75 is mounted to apply pressure to the tape 30 while it is in the guide bus 43 on a portion of the double-sided adhesive tape 66 which is also in the guide bus 43. After the release tape 67 is peeled off 9 93437, glue remains at a specific location on the bottom surface of the tape 30. which can then be transferred to the nip 29 of the rollers 23 and 27 to cut the web 20 and start winding the web 20 onto the roll 27. In this embodiment, a double sided adhesive tape 66 is fed from the spool 65 to a recess 58 at the bottom of the guide passage 46 and further to 87 at the release strip 67. (see Figures 7-8). The strip 30 then advances in the inner channel 56 over the strip 66 in the recess 58 and stops with its truncated front end at 87. The handle 80 is then pushed forward to a position 81 where the pressure roller 75 presses the strip 30 down the width of the recess 58, and the handle 80 pushed forward to position 82. Due to articulation with the rollers 72 on the rails 77, this movement causes the roller 75 to press the tape 30 down into the recess 58 to contact the adhesive portion 68 of the double-sided tape 66 and cause the adhesive tape 66 to adhere to the tape 30. The rollers 76 are eventually sized to contact the guide bus 43 the top and prevent the roller 75 from applying more pressure to the tape 30 than is necessary to pick up the adhesive tape 66. The handle 80 is then retracted to its original position and released to its vertical position (solid lines), allowing the strip 30 to return to its original undeformed planar state where it is not compressed into the recess 58. Upon returning to its original position, one of the supports 79 pushes into 88 touching the touch panel 85, which provides electrical power means (not shown), which rotate the spool 73 in the direction of the arrow 89. This causes the release tape 67 to disengage from the adhesive adhesion with the tape 30, and at the same time move to the next portion 68 of the double-sided adhesive tape 66 along the recess 58 to the forward position 87. It will be appreciated that other actuators such as gears, chains and sprockets and the like may also be used for the same purpose. This completes the cycle and prepares the tape 30 to advance to the nip 29 to cut the web 20 and begin to rewind to the spool 27 while a new portion of the tape 30 advances to point 87 to apply an adhesive site thereto.

Several embodiments have been proposed for applying an adhesive tape to the cutting tape 30. It will be appreciated that other methods may be equally effective and are also part of the present invention. The methods shown in Figures 2, 3, 6, 9 and 10 are preferred embodiments, but other methods, mechanical, manual or otherwise, are also possible. In the present invention, it is only necessary for the adhesive tape to be applied before the tape reaches the front end 44 of the guide bus 34. This is a safety measure to allow all functions to be controlled so that the user is next to the front end 44 without ever having to be at the other end of the guide bus 34.

One gripping member is shown in Figure 11. The corner support structure 155 extends outwardly from one end 36 of the guide bus 34 (which is bent in a different manner from the end 36 in Figure 1). The motor 156 and gearbox 157 rotate a knurled cylinder 158 mounted on a shaft 159. The belt 30 moves forward between a cylinder 158 and a table 160 articulated mounted at 159 to the structure 155 until the front end 37 of the cutting belt extends past the table 160. The movement of the strip 30 is then stopped by a table 160 which is pressed upwards against the cylinder 158, causing a large loop 161 of the strip 30 to form behind the cylinder 158. The table 160 pivots relative to the pin 162 by an upward movement of the end (not shown) 11 93437 connected to the fluid acting cylinder 164. The table 160 moves from its normal position to the upper position shown in Figure 11, where it presses the strip 30 against the cylinder 158 to stop the forward movement of the strip 30. When the user wants to make the front end 37 into the nip 29 cylinder 158 is caused to rotate in the direction of the arrow 168 against the free roller (not shown) in table 160 and thereby brought into the front end 137 of it. When the front end 37 meets the nip 29, the strip 30 retracts laterally from the gripping member and wraps around the roll 27, cutting the web 20 and starting to wind the cut edge of the web 20 onto the spool 27.

Although the invention has been described in terms of certain specific embodiments, it will be apparent that many modifications and variations are possible in those skilled in the art without departing from the spirit of the invention. The appended claims then include all such changes and modifications as fall within the spirit and scope of the invention.

Claims (14)

Apparatus for cutting a windable movable paper web (20) with a tape on a first coil (24) and for transferring said movable paper web to an empty coil (24) by attaching said tape to the empty coil, which device comprises: means (31) for feeding a cutting band (30); the elongated guide (34) of the cutting band (30) extending beneath the web (20) and extending across the web, the elongated guide (34) having an elongated open latch (57) facing the tread and having opposite , open ends (36, 36 ') adjacent to the side edges of the movable belt, while said guide is arranged to receive the belt (30) which is slidably attached to one of the open ends (36') and to transfer the belt (30) from said second opening the end (36) over the edge of the moving band; and adhesive spreading means (39) arranged next to one open end (36 ') of guide (34) for spreading glue without any coating on the surface of the cutting tape (30) before said cutting tape projects into said one open end (36') of the cutting band (34); characterized in that said adhesive spreading means (39) are arranged to automatically spread the adhesive on the surface of the cutting band (30) which is turned away from the lock (57) of the guide (34) and that said guide (34) forms a support surface (56a) , on which the cutting band (30) can slide through the guide (34), when the carrier surface (56a) is arranged not to be in contact with the surface mentioned by the cutting band (30), on which the adhesive is spread by means of the spreading means (39), wherein the cutting band (30) can slide through the guide without the adhesive adhering to it. 2. Device according to claim 2, characterized in that adhesive spreading means (39) are arranged to extend the adhesive on the central elongated surface portion of the cutting band (30), leaving the elongated side section of the belt on both sides without glue. 17 93437 3. Device according to claim 1 or 2, characterized in that adhesive spreading means (39) comprise means (65,70,71,75,80) for spreading a double-sided, pressure-sensitive adhesive band (66) on the cutting band (30). ) surface before the belt projects into the guide (34). Device according to claim 3, characterized in that spreading means (39) comprise means (65) for distributing a double-sided, pressure-sensitive adhesive tape (66) on the release binder (67); and means (70.71; 75.80) for compressing the adhesive tape (66) and the cutting tape, transferring the adhesive tape (66) to the cutting tape (30), and removing the release adhesive (67) from the adhesive tape (66), to leave the adhesive tape (66) on said cutting tape (30) to form said adhesive thereon. Device according to claim 4, characterized in that it comprises a channel guide (62; 43) for guiding said cutting band (30) parallel to the adhesive tape (66), and wherein the spreading means of the adhesive tape comprises a spindle (65) for mounting a bias roller. of said double-sided, pressure-sensitive adhesive tape (66), said bias roller has been arranged to selectively distribute adhesive tape lengths (68) therefrom, and means (70) for passing said adhesive tape under the cutting tape (30) to said channel guide (62; 43) and longitudinally fitted with it. Apparatus according to claim 1 or 2, characterized in that said adhesive spreading means (39) comprise a nozzle (54) for spraying a liquid adhesive on the surface of the cutting band (30) before said belt projects into the guide (34). 7. Apparatus according to claim 1 or 2, characterized in that said adhesive spreading means (39) comprise roller means (46) for spreading a liquid adhesive on the surface of the cutting band (30) before said belt protrudes in the guide (34). 18 93437 Device according to any one of claims 2-7, characterized in that said guide (34) has an elongate recess (56,58) parallel to said recess (57), which recess (56) forms a bar surface (56a). for supporting the cutting band (30) along its elongate lateral portion (61), while the central elongated section of the cutting band (30) is at a distance from the lower wall of said depression (56,58). Device according to any of the preceding claims, characterized in that it further comprises a remote-controlled mechanical arm (40) arranged to grip the cutting band (30) behind the adhesive-coated section at the front end of the belt as the belt (30) leaves the guide. (34) and it feeds the front end into contact with the empty coil (27). Device according to claim 1, characterized in that it further comprises clamping means (40, 42, -155-164) for releasably gripping the belt at its front end to prevent the belt from moving after the front end has left the guide ( 34), and optionally loosen the belt to allow movement of the front end of the nip between the empty coil (27) and the cooperating roller (23), which roller (23) drives the empty coil (27). A method for cutting a retractable movable paper web on a coil (24) and for transferring the web after cutting onto an empty coil (27), which method comprises feeding a cutting strip (30) to an elongated guide (34), which runs beneath the paper web (20) and extends laterally across the web, spreading the adhesive without any coating on a section of the cutting band (30) at its forward end before feeding the cutting tape to the guide (34), the band's reception in the guide. (34) the far end and its feed to the nip (29) between the empty coil (27) and the roller (23) driving this coil, the adhesive section (38) being in contact with the blank coil to provide an automatic helical winding of the tape on the blank spool while cutting the paper web; characterized in that the cutting band (30) slides through the guide (34) to the support surface (56a), the adhesive section (38) being opposite to the supporting surface (56a) and not in contact with it. Method according to claim 11, characterized in that the adhesive is automatically applied to the cutting band (30) by contacting the cutting band (30) with a pressure-sensitive adhesive (66) coated on the release adhesive (67) and by releasing the release adhesive (67). ). A method according to claim 11, characterized in that the adhesive is automatically applied to the cutting tape (30) by spraying the adhesive on the cutting tape (30). A method according to claim 11, characterized in that the adhesive is automatically applied to the cutting belt by contacting the cutting belt (30) with a spreading roller (46), which roller receives a liquid adhesive coating from its stock.