US20070163718A1 - Velocity-changing apparatus for web - Google Patents

Velocity-changing apparatus for web Download PDF

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Publication number
US20070163718A1
US20070163718A1 US10/598,265 US59826505A US2007163718A1 US 20070163718 A1 US20070163718 A1 US 20070163718A1 US 59826505 A US59826505 A US 59826505A US 2007163718 A1 US2007163718 A1 US 2007163718A1
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US
United States
Prior art keywords
velocity
drum
continuous web
web
cut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/598,265
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English (en)
Inventor
Masaki Nakakado
Akihiro Miyoshi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zuiko Corp
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Zuiko Corp
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Filing date
Publication date
Application filed by Zuiko Corp filed Critical Zuiko Corp
Assigned to ZUIKO CORPORATION reassignment ZUIKO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MIYOSHI, AKIHIRO, NAKAKADO, MASAKI
Publication of US20070163718A1 publication Critical patent/US20070163718A1/en
Priority to US12/791,099 priority Critical patent/US8062459B2/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
    • B65H35/04—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators
    • B65H35/08—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with transverse cutters or perforators from or with revolving, e.g. cylinder, cutters or perforators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/02—Advancing webs by friction roller
    • B65H20/04—Advancing webs by friction roller to effect step-by-step advancement of web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H20/00—Advancing webs
    • B65H20/24—Advancing webs by looping or like devices
    • 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
    • B65H23/048—Registering, tensioning, smoothing or guiding webs longitudinally by positively actuated 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
    • 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
    • B65H23/188—Registering, tensioning, smoothing or guiding webs longitudinally by controlling or regulating the web-advancing mechanism, e.g. mechanism acting on the running web in connection with running-web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B26D1/40—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member
    • B26D1/405—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut and coacting with a rotary member for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/10—Selective handling processes
    • B65H2301/12—Selective handling processes of sheets or web
    • B65H2301/122—Selective handling processes of sheets or web for web or sheet handling processes wherein the sheets are cut from the web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1056—Perforating lamina
    • Y10T156/1057—Subsequent to assembly of laminae
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1712—Indefinite or running length work

Definitions

  • the present invention relates to a velocity-changing apparatus for a web, wherein predetermined processing can be added onto the web while the web is being transported.
  • Velocity-changing apparatuses and apparatuses for producing absorbent articles in which apparatuses the velocity of the web can be slowed down during the processing of the web with the speed of the production line kept constant in order to increase the production efficiency, are heretofore known (for example, the following first and second patent documents).
  • processing of the web by ultrasonic welding requires more time for processing than that by heat sealing. Therefore, introducing the ultrasonic welding in place of the heat sealing into the existing production line might cause slowdown of the production line as a whole, thereby decreasing the production efficiency.
  • An object of the present invention is to provide a new velocity-changing apparatus for a web that can be incorporated into the production line without decreasing the speed of the production line as a whole.
  • a velocity-changing apparatus of the present invention for changing a velocity of a continuous web comprises: a drum for transporting (carrying) the continuous web at a transport velocity (carrying velocity) which is generally equal to a circumferential velocity (peripheral velocity) of the drum while changing the circumferential velocity periodically at least once per one rotation of the drum; a movable member disposed upstream of the drum for feeding the continuous web to the drum; and a cutter for cutting, on the drum, the continuous web being transported at the transport velocity which is generally equal to the circumferential velocity of the drum.
  • the movable member moves according to the change of the circumferential velocity of the drum so that a feed velocity at which the continuous web is fed to the drum is generally equal to the transport velocity of the continuous web being transported by the drum.
  • the rotational velocity of the drum is changed periodically while the continuous web is being transported by means of the rotation of the drum.
  • the transport velocity of the continuous web which is transported by the drum, is changed periodically.
  • the movable member moves periodically so that the feed velocity of the continuous web decreases when the transport velocity of the continuous web on the drum decreases and that the feed velocity of the continuous web increases when the transport velocity of the continuous web on the drum increases.
  • the continuous web on the drum or on the upstream side of the drum can be prevented from substantially slacking or shrinking.
  • the velocity-changing apparatus for the web may include only one drum or may include a plurality of drums.
  • the processing of the continuous web may be carried out on one of the drums and the cutting of the continuous web may be carried out on another of the drums.
  • it is preferred that the circumferential velocities of the drums are set substantially the same.
  • the velocity-changing apparatus further comprises a processing device for processing the continuous web on the drum.
  • the continuous web on the drum can be processed when the circumferential velocity of the drum slows down, i.e., the transport velocity of the continuous web slows down, which allows for more time for processing.
  • the transport velocity of the continuous web can be accelerated by accelerating the circumferential velocity of the drum when the processing is not performed, which makes the average transport velocity of the continuous web in conformity with the speed of the production line as a whole.
  • the processing device processes the continuous web when the transport velocity at which the drum transports the continuous web is lower than an average circumferential velocity of the drum.
  • the processing device may be a welder for welding the continuous web.
  • the cutter cut the continuous web when the transport velocity at which the drum transports the continuous web is lower than the average circumferential velocity of the drum. In this aspect, the accuracy of cutting can be improved.
  • the velocity-changing apparatus further comprises a receiving device for receiving a cut-off web cut off by the cutter and then transporting the cut-off web.
  • a velocity at which the received cut-off web is transported by the receiving device when the receiving device receives the cut-off web is set larger than the transport velocity of the continuous web at the time of cutting. Thereby, a tip end of the continuous web and a rear end of the cut-off web are spaced from each other.
  • the cut-off web produced by cutting the continuous web can be transported (moved) at a velocity which is higher than the circumferential velocity of the drum at the time of the cutting. Furthermore, since the receiving device transports (moves) the cut-off web at such a higher velocity, the tip end of the continuous web can get away from the rear end of the cut-off web. Thus, even when the transport velocity of the continuous web is accelerated after this spacing, the front end of the continuous web can be prevented from interfering with the rear end of the cut-off web.
  • the circumferential velocity may be changed once per one rotation of the drum, or may be changed two or more times per one rotation of the drum.
  • the number of the change of the circumferential velocity per one rotation of the drum may be set according to the position of the web to be processed or according to the type of the article to be produced.
  • FIG. 1 ( a ) is a schematic side view showing a velocity-changing apparatus for web according to the first embodiment of the present invention
  • FIGS. 1 ( b ), 1 ( c ) are schematic side views each showing an example of a path of motion of a movable roller.
  • FIG. 2 is a schematic side view showing a velocity-changing apparatus for web according to a modified embodiment of the present invention.
  • FIGS. 3 ( a ), 3 ( b ) are schematic side views each showing a velocity-changing apparatus for web according to the second embodiment of the present invention.
  • FIG. 4 is a schematic side view showing a velocity-changing apparatus for web according to the third embodiment of the present invention.
  • FIG. 5 is a schematic side view showing a velocity-changing apparatus for web according to the fourth embodiment of the present invention.
  • FIG. 6 is a schematic side view showing a velocity-changing apparatus for web according to the fifth embodiment of the present invention.
  • FIGS. 7 ( a ), 7 ( b ), 7 ( c ) are characteristic curves each showing a change of a circumferential velocity of a drum.
  • FIG. 1 shows the first embodiment, which includes a velocity-changing apparatus WS for web.
  • the velocity-changing apparatus WS includes a movable roller 2 (an example of movable member), a work drum 3 and a cutter roller 4 .
  • a fixed roller 1 may be located upstream of the movable roller 2 .
  • a continuous web W 1 is fed successively to the work drum 3 from the movable roller 2 , which is located upstream of the work drum 3 .
  • On the outer circumferential surface of the cutter roller 4 two blades 41 are provided.
  • One or more blade rests (beds) for receiving the blades 41 may be provided on the work drum 3 .
  • the work drum 3 can rotate while changing periodically its circumferential velocity V( ⁇ ) (peripheral velocity).
  • V( ⁇ ) peripheral velocity
  • the work drum 3 enables the continuous web W 1 to move at a velocity which is commensurate with the processing ability of the processing device.
  • the work drum 3 may have a structure wherein the continuous web W 1 can be held thereon by suction. If a structure for sucking the continuous web W 1 by means of vacuum is employed, a suction hole (not shown) may be provided on the work drum 3 .
  • the work drum 3 is rotatably driven by a motor, for example, a servo motor.
  • a motor for example, a servo motor.
  • the change of the circumferential velocity of the work drum 3 may be realized by employing a method wherein the velocity is changed by means of combination of a main motor for rotatably driving the work drum 3 and a servo motor for changing the velocity (for example, Japanese Patent Laid-Open No. 2003-145485).
  • the cutter roller 4 can cut the continuous web W 1 on the work drum 3 after some processing is added onto the continuous web W 1 . Since the continuous web W 1 is cut by the cutter roller 4 , a cut-off web W 2 located downstream of the cutting position 31 can move at a different velocity from the continuous web W 1 located upstream of the cutting position 31 .
  • the transport velocity (circumferential velocity) of the continuous web W 1 at the time of cutting the continuous web W 1 is indicated by V 1 , for example. Even when, after cutting, the transport velocity (carrying velocity) of the continuous web W 1 located upstream of the cutting position 31 shifts to a velocity V 2 which is lower than or higher than V 1 , the transport velocity (carrying velocity) of the cut-off web W 2 located downstream of the cutting position 31 won't be affected by the shifted velocity V 2 . That is, the transport velocity of the cut-off web W 2 is independent from the circumferential velocity of the work drum 3 , i.e., the transport velocity of the continuous web W 1 .
  • the cut-off web W 2 is released from the work drum 3 and is carried by another carrying device or that the cut-off web W 2 is subject to some force from another carrying device if not released from the work drum 3 .
  • the tip end (front end) of the continuous web W 1 and the rear end of the cut-off web W 2 get spaced apart from each other.
  • the front end of the continuous web can be prevented from interfering with the rear end of the cut-off web.
  • a receiving device 50 shown in FIG. 3 ( a ) or FIG. 3 ( b ) may be employed as such downstream carrying device.
  • the receiving device 50 receives the cut-off web W 2 from the work drum 3 by suction or by mechanical means, immediately after the cutter roller 4 cut the continuous web W 1 .
  • the work drum 3 may stop its sucking action when the work drum 3 hands over the cut-off web W 2 to the receiving device 50 , so as to make the cut-off web W 2 easily unstick from the work drum 3 .
  • the continuous web W 1 would be slacked between the movable roller 2 and the work drum 3 .
  • Such slacking brings about a negative effect on the flow (transport) of the continuous web W 1 , because the continuous web W 1 may get tangled up, for example, if the slacked portion is long.
  • the movable roller 2 reciprocates according to the change of the circumferential velocity of the work drum 3 . Accordingly, the feed velocity at which the continuous web W 1 is fed to the work drum 3 is kept generally equal to the circumferential velocity of the work drum 3 , i.e., the transport velocity of the continuous web W 1 on the work drum 3 .
  • dx amount of displacement of the movable roller 2 with respect to the work drum 3 per minute period of time
  • a value obtained by dividing the amount of displacement dx of the movable roller 2 with respect to the work drum 3 per minute period of time dt by the minute period of time dt and then doubling the divided amount is generally equal to the acceleration dV( ⁇ ) of the work drum 3 .
  • the feed velocity of the continuous web W 1 is increased (accelerated) and it becomes possible to increase (accelerate) the circumferential velocity V( ⁇ ) of the work drum 3 according to the increased feed velocity.
  • the movable roller may be moved by swinging an arm to which the movable roller 2 is fixed.
  • the movable roller 2 may be moved by pivoting the movable roller 2 about its pivot center R, which is different from and is located eccentrically to the center O of rotation of the movable roller 2
  • the fixed roller 1 and the movable roller 2 may be arranged as shown in FIG. 2 , in which case the relationship between the moving direction of the movable roller 2 and both the feed velocity of the continuous web W 1 and the circumferential velocity of the work drum 3 is reversed from that in the above mentioned velocity-changing apparatus of FIG. 1 ( a ).
  • the velocity-changing apparatus of the present invention may include a processing device.
  • the processing device is capable of carrying out steps of cutting, forming holes, sealing, attaching or applying something, or the like.
  • ultrasonic welding means or heat sealing means may be employed thereto.
  • the second embodiment, in which ultrasonic welding means is used will be described with reference to FIGS. 3 ( a ), 3 ( b ).
  • At least one main body of the processing device 6 is located around the work drum 3 .
  • the work drum 3 may include a plurality of anvils (receiving beds) 30 .
  • the work drum 3 may hold the continuous web W 1 by suction or by mechanical means at the anvils 30 and/or a portion other than the anvils 30 .
  • the continuous web W 1 is received by the work drum 3 at a receiving position P 1 of the work drum 3 and is processed at processing positions P 2 , P 2 by the processing device 6 .
  • the processing device 6 adds processing onto a portion of a region of the continuous web W 1 , which region is placed on the anvil 30 .
  • the continuous web W 1 is cut by the cutter roller 4 at the cutting position P 3 .
  • the circumferential velocity of the cutter roller 4 may be generally equal to the circumferential velocity of the work drum 3 .
  • the cut-off web which has been produced by cutting the continuous web, is received by the receiving device 50 at a hand-over position P 5 , and then, is placed onto the conveyor 51 .
  • the moving velocity of the continuous web W 1 at the time of processing is lowered by the movable roller 2 and the work drum 3 , as above mentioned. That is, as shown in FIG. 3 ( a ), at the time of processing, the movable roller 2 moves in the opposite direction A 2 so as to decrease the feed velocity of the continuous web W 1 and, concurrently, the circumferential velocity of the work drum 3 is decreased so that the transport velocity of the continuous web W 1 on the work drum 3 is decreased.
  • the movable roller 2 moves in the feed direction A 1 so as to increase the feed velocity of the continuous web W 1 and, concurrently, the circumferential velocity of the work drum 3 is increased so that the transport velocity of the continuous web W 1 on the work drum 3 is increased.
  • the velocity-changing apparatus for the web enables incorporation of the ultrasonic welding device into the existing production line without lowering the speed of the production line as a whole.
  • a plurality of the processing devices 6 , 6 may be arranged around the work drum 3 , which makes it possible to apply efficiently the ultrasonic energy onto portions of the web to be welded, and therefore such configuration can be expected to lead to more speed-up of the production line.
  • the circumferential velocity V( ⁇ ) of the work drum 3 changes periodically according to the phase ⁇ of the work drum 3 .
  • the relationship between the circumferential velocity V( ⁇ ) and the phase ⁇ may be defined by various functions.
  • the circumferential velocity V( ⁇ ) may change according to simple sine curve, as shown in FIG. 7 ( a ). If the movable roller 2 stops temporarily at the center of moving (a position indicated by solid line of the movable roller 2 in FIG. 3 ( a )), the work drum 3 may be controlled so as to rotate, temporarily, at a constant circumferential velocity, which is equal to the average velocity Va, as shown in FIG. 7 ( b ).
  • the work drum 3 may be controlled so as to rotate, temporarily, at a constant circumferential velocity when the circumferential velocity V( ⁇ ) reaches its minimum or its maximum, as shown in FIG. 7 ( c ).
  • the processing by the processing device 6 may be carried out while the circumferential velocity V( ⁇ ) of the work drum 3 is lower than the average circumferential velocity Va of the work drum 3 .
  • This processing may also be carried out while the circumferential velocity V( ⁇ ) of the work drum 3 is generally equal to or slightly higher than the average circumferential velocity Va of the work drum 3 , in addition to while the circumferential velocity V( ⁇ ) of the work drum 3 is lower than the average circumferential velocity Va of the work drum 3 .
  • the cutting of the continuous web W 1 by the cutter roller 4 may be carried out when the processing is carried out, as shown in FIG. 7 ( a ), or may be carried out when the processing is not carried out, as shown in FIGS. 7 ( b ), 7 ( c ). In view of the accuracy of cutting, it is preferred that the cutting of the continuous web W 1 by the cutter roller 4 is carried out while the circumferential velocity V( ⁇ ) of the work drum 3 is lower than the average circumferential velocity Va of the work drum 3 .
  • the rotation angle per cycle (period) of velocity-changing of the work drum 3 i.e., 2 ⁇ (pi)/N, may be, for example, an angle obtained by dividing 2 ⁇ by the number m of the anvils provided on the work drum 3 .
  • the receiving device 50 shown in FIG. 3 may receive the cut-off web W 2 when the circumferential velocity V( ⁇ ) of the work drum 3 is at maximum. In this way, the cut-off web W 2 can be prevented from slacking at the hand-over position P 5 of the cut-off web W 2 when the receiving device 50 receives the cut-off web W 2 from the work drum 3 .
  • FIG. 4 shows the third embodiment.
  • a adjustment drum having a plurality of pads 55 is employed as the receiving device 50 , in which drum the interval between the pads is adjusted by rotating the pads 55 while changing their circumferential velocity.
  • the circumferential velocity of the pad 55 may reach its maximum at the hand-over position P 5 and then be decreased to a velocity commensurate with the velocity of the conveyor 51 when the cut-off web W 2 is transferred to the conveyor 51 .
  • a structure as disclosed in Japanese Laid-Open Patent Publication No. 2002-345889 may be employed for the adjustment drum.
  • FIG. 5 shows the fourth embodiment.
  • the cutter roller 4 cut the continuous web W 1 , which has been released from the work drum 3 , on the pad 55 of the receiving device 50 .
  • the cutting position at which the continuous web is cut is not limited to such position.
  • the continuous web W 1 which has been released from the work drum 3 , may be cut by the cutter roller 4 at a position between the work drum 3 and the receiving device 50 for receiving the continuous web W 1 from the work drum 3 .
  • FIG. 6 shows the fifth embodiment.
  • the velocity-changing apparatus of this embodiment includes the first work drum 3 and the second work drum 3 A located downstream of the first work drum 3 .
  • the second work drum 3 A is an anvil roller and receives the continuous web W 1 from the first work drum 3 .
  • the continuous web W 1 is cut on the second work drum 3 A by the cutter roller 4 .
  • the second work drum 3 A rotates while changing periodically its circumferential velocity in synchronism with the first work drum 3 . That is, it is preferred that the circumferential velocity of the second work drum 3 A is controlled to be generally equal to the circumferential velocity of the first work drum 3 . In this case, the transport velocity of the continuous web W 1 on the first work drum 3 is generally equal to the transport velocity of the continuous web W 1 on the second work drum 3 A.
  • the cut-off web W 2 which is produced by cutting the continuous web W 1 on the second work drum 3 A, is handed over to the conveyor (receiving device) 51 and then transported downstream.
  • the movable member is not limited to the roller.
  • a web guider may be provided for carrying the web smoothly.
  • the present invention is preferably applicable to facilities where the web is processed successively, for example, production facilities for producing disposable worn articles, building materials, medical materials or the like.

Landscapes

  • Absorbent Articles And Supports Therefor (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Advancing Webs (AREA)
  • Replacement Of Web Rolls (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
US10/598,265 2004-03-05 2005-03-01 Velocity-changing apparatus for web Abandoned US20070163718A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/791,099 US8062459B2 (en) 2004-03-05 2010-06-01 Velocity-changing apparatus for web

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004-061518 2004-03-05
JP2004061518 2004-03-05
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JP6097331B2 (ja) * 2015-04-22 2017-03-15 ユースエンジニアリング株式会社 枚葉積層型リチウムイオン電池の製造装置、および枚葉積層型リチウムイオン電池の製造方法
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US20180208343A1 (en) * 2015-10-16 2018-07-26 Avent, Inc. Method and System for Wrapping and Preparing Facemasks for Packaging in a Manufacturing Line
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CN116276102A (zh) * 2023-02-14 2023-06-23 江苏三环奥纳科技有限公司 一种非晶带材表面处理设备

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WO2005085108A1 (fr) 2005-09-15
EP1721850A4 (fr) 2008-09-03
ATE556012T1 (de) 2012-05-15
CN1930068A (zh) 2007-03-14
US20100282812A1 (en) 2010-11-11
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JPWO2005085108A1 (ja) 2007-12-06
EP1721850B1 (fr) 2012-05-02

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