WO2011046854A2 - Corrugated edge nip - Google Patents

Corrugated edge nip Download PDF

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Publication number
WO2011046854A2
WO2011046854A2 PCT/US2010/052137 US2010052137W WO2011046854A2 WO 2011046854 A2 WO2011046854 A2 WO 2011046854A2 US 2010052137 W US2010052137 W US 2010052137W WO 2011046854 A2 WO2011046854 A2 WO 2011046854A2
Authority
WO
WIPO (PCT)
Prior art keywords
web
corrugated surface
edge portion
axis
nip
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.)
Ceased
Application number
PCT/US2010/052137
Other languages
English (en)
French (fr)
Other versions
WO2011046854A3 (en
Inventor
Kevin B. Newhouse
Bruce E. Tait
Terence A. Lee
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.)
3M Innovative Properties Co
Original Assignee
3M Innovative Properties Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 3M Innovative Properties Co filed Critical 3M Innovative Properties Co
Priority to US13/500,154 priority Critical patent/US9038879B2/en
Priority to CN201080043624.1A priority patent/CN102548879B/zh
Priority to JP2012534261A priority patent/JP5785174B2/ja
Priority to EP10823887.4A priority patent/EP2488431A4/en
Priority to KR1020127011736A priority patent/KR101730677B1/ko
Publication of WO2011046854A2 publication Critical patent/WO2011046854A2/en
Publication of WO2011046854A3 publication Critical patent/WO2011046854A3/en
Anticipated expiration legal-status Critical
Priority to US14/695,472 priority patent/US9725270B2/en
Ceased legal-status Critical Current

Links

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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • B65H23/025—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by 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
    • 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
    • B65H35/02—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 longitudinal slitters 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
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/02—Registering, tensioning, smoothing or guiding webs transversely
    • B65H23/022—Registering, tensioning, smoothing or guiding webs transversely by tentering devices
    • B65H23/025—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers
    • B65H23/0251—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers with a straight axis
    • B65H23/0256—Registering, tensioning, smoothing or guiding webs transversely by tentering devices by rollers with a straight axis with opposed helicoidal windings
    • 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
    • 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
    • B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable 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
    • B65H27/00—Special constructions, e.g. surface features, of feed or guide rollers for webs
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting
    • B65H2301/41487—Winding slitting trimming edge
    • 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
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/512—Changing form of handled material
    • B65H2301/5121—Bending, buckling, curling, bringing a curvature
    • B65H2301/51214—Bending, buckling, curling, bringing a curvature parallel to direction of displacement of handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1311—Undulations, wavy shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/13—Details of longitudinal profile
    • B65H2404/131—Details of longitudinal profile shape
    • B65H2404/1317—End profile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/141—Roller pairs with particular shape of cross profile
    • B65H2404/1415—Roller pairs with particular shape of cross profile with male / female profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/13—Parts concerned of the handled material
    • B65H2701/131—Edges
    • B65H2701/1315—Edges side edges, i.e. regarded in context of transport

Definitions

  • a web or film suspended between two idler rolls in currently available web lines can support tension in the direction of the moving web, but there are no adequate techniques to provide a crossweb tension to the suspended web.
  • the inability to provide crossweb tension can cause problems in web processing, for example, current
  • the present disclosure provides a web tensioner that includes a tensioning plane having a center portion, a first edge portion, a second edge portion opposite the first edge portion, and a tensioning direction perpendicular to both the first edge portion and the second edge portion.
  • the web tensioner further includes a first nip wheel having a first corrugated surface adjacent the first edge portion on a first surface of the tensioning plane.
  • the web tensioner still further includes a second nip wheel having a second corrugated surface adjacent the first edge portion on a second surface of the tensioning plane opposite the first surface, wherein the first corrugated surface and the second corrugated surface at least partially intermesh.
  • the present disclosure provides a web slitter that includes a tensioning plane having a center portion, a first edge portion, a second edge portion opposite the first edge portion, and a tensioning direction perpendicular to both the first edge portion and the second edge portion.
  • the web slitter further includes a first nip wheel having a first corrugated surface adjacent the first edge portion on a first surface of the tensioning plane.
  • the web slitter still further includes a second nip wheel having a second corrugated surface adjacent the first edge portion on a second surface of the cutting plane opposite the first surface.
  • the web slitter still further includes at least one cutting device disposed to cut the center portion, wherein the first corrugated surface and the second corrugated surface at least partially intermesh.
  • the present disclosure provides a method of applying lateral tension to a web that includes suspending a web moving in a downweb direction, the web having a center portion, a first edge portion, and a second edge portion opposite the first edge portion.
  • the method of applying lateral tension to a web further includes positioning a first corrugated surface of a first nip wheel adjacent the first edge portion on a first surface of the web, the first nip wheel having a first axis.
  • the method of applying lateral tension to a web still further includes positioning a second corrugated surface of a second nip wheel adjacent the first edge portion on a second surface of the web, the second nip wheel having a second axis parallel to the first axis.
  • the method of applying lateral tension to a web still further includes positioning a third corrugated surface of a third nip wheel adjacent the second edge portion on the first surface of the web, the third nip wheel having a third axis.
  • the method of applying lateral tension to a web still further includes positioning a fourth corrugated surface of a fourth nip wheel adjacent the second edge portion on the second surface of the web, the fourth nip wheel having a fourth axis parallel to the third axis.
  • the method of applying lateral tension to a web still further includes driving at least one of the first nip wheel to rotate about the first axis and the second nip wheel to rotate about the second axis.
  • the method of applying lateral tension to a web still further includes driving at least one of the third nip wheel to rotate about the third axis and the fourth nip wheel to rotate about the fourth axis.
  • the method of applying lateral tension to a web still further includes intermeshing the first corrugated surface with the second corrugated surface and the third corrugated surface with the fourth corrugated surface, thereby applying a lateral tension to the center portion of the web.
  • the present disclosure provides a method of slitting a web that includes suspending a web moving in a downweb direction, the web having a center portion, a first edge portion, and a second edge portion opposite the first edge portion.
  • the method of slitting a web further includes positioning a first corrugated surface of a first nip wheel adjacent the first edge portion on a first surface of the web, the first nip wheel having a first axis.
  • the method of slitting a web still further includes positioning a second corrugated surface of a second nip wheel adjacent the first edge portion on a second surface of the web, the second nip wheel having a second axis parallel to the first axis.
  • the method of slitting a web still further includes positioning a third corrugated surface of a third nip wheel adjacent the second edge portion on the first surface of the web, the third nip wheel having a third axis.
  • the method of slitting a web still further includes positioning a fourth corrugated surface of a fourth nip wheel adjacent the second edge portion on the second surface of the web, the fourth nip wheel having a fourth axis parallel to the third axis.
  • the method of slitting a web still further includes driving at least one of the first nip wheel to rotate about the first axis and the second nip wheel to rotate about the second axis.
  • the method of slitting a web still further includes driving at least one of the third nip wheel to rotate about the third axis and the fourth nip wheel to rotate about the fourth axis.
  • the method of slitting a web still further includes intermeshing the first corrugated surface with the second corrugated surface and the third corrugated surface with the fourth corrugated surface, thereby applying a lateral tension to the center portion of the web.
  • the method of slitting a web still further includes positioning at least one cutting device to cut the web in the center portion.
  • FIG. 1 A is a perspective schematic of a prior art web line
  • FIG. IB is a cross sectional schematic of a prior art web
  • FIG. 2 is a perspective schematic of a web line
  • FIG. 3 is a cross-sectional downweb view of a web tensioner
  • FIGS. 4A-4H are schematic cross-sections of a pair of nip rolls
  • FIG. 5 is a perspective schematic of a web slitter
  • FIG. 6 is a cross-sectional downweb view of a web slitter.
  • corrugated edge nip that can provide crossweb tension to a suspended web or film.
  • the corrugated edge nip can be used in conjunction with, for example, a rotary shear slitter to improve slit edge quality.
  • the corrugated edge nip wheels can perform several functions.
  • the corrugated edge nip can nip the outer edge of the web next to shear slitting knives to stabilize the web presented to the shear slitter.
  • the corrugated edge nip can also isolate the point of slitting from external forces including edge trim removal, drafts, static electricity, and the like.
  • the corrugated edge nip can also provide crossweb tensioning and impart structural integrity to the resulting edge trim (weed), to aid in edge trim removal.
  • the corrugated edge nip can reduce web breaks by increasing web stability and edge quality during shear slitting. Stability improvements can result from crossweb tension generated by nipping the outer web edges. Nipping the outer web edge also isolates the point of slitting from external forces on the edge trim produced by the trim removal system. External forces on the edge trim can produce micro fractures in the slit edge, leading to web breaks.
  • the corrugated nip wheel design not only reduces forces leading to web breaks, but it can also form a curved edge trim, thereby providing a downweb structure which can assist in edge trim removal.
  • FIG. 1A is a perspective schematic of a prior art web line 100 that includes a web 110 suspended over a region 140 between a first idler roll 120 and a second idler roll 130.
  • Web 110 is shown to be moving in a downweb direction 101 (that is, in the "y" coordinate direction), and is kept taut in region 140 by an upweb tension Tu and a downweb tension T D .
  • FIG. IB is a cross sectional schematic of a prior art web 110 through the section A- A' within region 140 of FIG. 1A.
  • a slight "waviness" deformation in the web 110 is shown, representing the lack of cross-web (that is, in the "x" coordinate direction) tension in web 110. Since there is no applied crossweb tension within region 140, the web 110 can vary from a plane, and subsequent application of, for example, a knife edge 190, can cause further deformation of the web. This waviness or deformation can cause problems when attempting to accurately and cleanly cut the web, since the cut line is not well defined. In other words, the cut edge can be jagged with debris generation.
  • FIG. 2 is a perspective schematic of a web line 200 according to one aspect of the disclosure.
  • a web 210 is suspended over a region 240 between a first idler roll 220 and a second idler roll 230.
  • Web 210 is shown to be moving in a downweb direction 201 (that is, in the "y" coordinate direction), and is kept taut in region 240, in part, by an up web tension Tu and a downweb tension T D .
  • web line 200 further includes a tensioning plane indicated by a crossweb tension Tc in the "x" coordinate direction (that is, perpendicular to the first and second edge portions 212, 212'.
  • the tensioning plane includes a web having a center portion 214, a first edge portion 212, and a second edge portion 212' opposite the first end portion 212.
  • a first pair of nip wheels 250 is adjacent the first edge portion 212 of web 210, and a second pair of nip wheels is adjacent the second edge portion 212' of web 210.
  • Each pair of nip wheels (250, 250') provide the crossweb tension Tc, as described elsewhere.
  • a single pair of nip wheels (either 250 or 250') on one of the edge portions (212 or 212' respectively) may provide sufficient crossweb tension to planarize the web 210.
  • Crossweb tension from a single pair of nip wheels may be sufficient, for example, when the web 210 can be prevented from sliding across the first and second idler rolls 220, 230, in the x coordinate direction, as described elsewhere.
  • FIG. 3 is a cross-sectional downweb view of a web tensioner 300 through the section B-B' of the web line 200 of FIG. 2, according to one aspect of the disclosure.
  • the web tensioner 300 includes the web 210 that includes the center portion 214, the first end portion 212 and the second end portion 212' opposite the first end portion 212.
  • the first pair of nip rolls 250 and the second pair of nip rolls 250 are shown to be adjacent the first and second end portions 212, 212', respectively.
  • Each of the first and second pairs of nip rolls 250, 250' include a first nip roll 251 , 251 ' having a first corrugated surface 252, 252' on a first surface 211 of web 210.
  • Each of the first and second pairs of nip rolls 250, 250' further includes and a second nip roll 256, 256' having a second corrugated surface 254, 254' on a second surface 213 of web 210.
  • Each of the first nip rolls 251, 251 ' include a first axis 253, 253', around which the first nip rolls 251, 251 ' can rotate.
  • Each of the second nip rolls 256, 256' include a second axis 255, 255', around which the second nip rolls 256, 256' can rotate.
  • each of the first and second nip rolls (251 , 25 ⁇ , 256, 256') can be driven nip rolls, that is, an external power source such as a motor (not shown) causes rotation of the nip rolls.
  • each of the first axis 253, 253' and the second axis 255, 255' can be parallel to the crossweb tension Tc direction.
  • one or more of the first and second axis (253, 253', 255, 255') can be oriented in a direction that is not parallel to the crossweb tension Tc direction, as described elsewhere.
  • first and second pairs of nip rolls 250, 250' at least partially intermesh at a first bending region 260 and a second bending region 260', respectively.
  • the first and second bending regions 260, 260' are regions where the web 210 is constrained in a serpentine path between the partially intermeshing pairs of nip rolls 250, 250', as shown in FIG. 3.
  • the serpentine path of web 210 within first and second bending regions 260, 260' can increase the section modulus of the web 210, and provide the crossweb tension Tc that can serve to reduce the "waviness" (shown in FIG. IB) of at least the center portion 214 of web 210. In this manner, the center portion 214 of web 210 can remain flat in the tensioning plane.
  • At least one of the first and second pair of nip rolls 250, 250' can be canted at an angle relative to the tensioning plane defined by the center portion 214 of web 210, to increase the crossweb tension Tc.
  • At least one of the first and second pair of nip rolls 250, 250' can be canted at an angle relative to the crossweb tension Tc direction (angled relative to the "x" direction), to increase the crossweb tension Tc.
  • FIGS. 4A-4H are schematic cross-sections of a pair of nip rolls.
  • the following description will be directed toward the first pair of nip rolls 250; however, it is to be understood that a similar description applies to the second pair of nip rolls 250' shown in, for example, FIG. 3.
  • FIG. 4A shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • first pair of nip rolls 250 include a first nip roll 251 that includes a first corrugated surface 252, and a second nip roll 256 that includes a second corrugated surface 254.
  • Each of the first and second corrugated surfaces 252, 254 have sinusoidal corrugations having a first period Pi and a second period P 2 , respectively.
  • Web 210 includes a center portion 214 and a first edge portion 212, where the first edge portion 212 passes in a serpentine manner through first bending region 260 defined by partially intermeshing first corrugated surface 252 and second corrugated surface 254.
  • first period Pi and second period P 2 of corrugations are equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are aligned, that is, the first and second periods Pi, P 2 overlap.
  • FIG. 4B shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • Each of the elements 210-260 shown in FIG. 4B correspond to like-numbered elements 210-260 shown in FIG. 4A, which have been described previously.
  • first period Pi and second period P 2 of corrugations are equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are misaligned, that is, the first and second periods Pi, P 2 are displaced by a period offset Po.
  • the period offset Po can be used adjust the crossweb tension Tc described elsewhere.
  • the period offset Po can be positioned so that the first nip roll 251 is closer to the web center portion 214 as shown in FIG. 4B, or the period offset Po can be positioned so that the second nip roll 256 is closer to the web center portion 214 (not shown).
  • FIG. 4C shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • Each of the elements 210-260 shown in FIG. 4B correspond to like-numbered elements 210-260 shown in FIG. 4A, which have been described previously.
  • first period Pi and second period P 2 of corrugations are equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are misaligned, that is, the first and second periods Pi, P 2 are displaced similar to the embodiment shown in FIG. 4B.
  • the first and second periods Pi, P 2 are displaced such that the web 210 is pinched at a pinch point 262.
  • Pinch point 262 can be used to adjust the crossweb tension Tc described elsewhere.
  • the pinch point 262 can be positioned anywhere within bending region 260, as desired.
  • FIG. 4D shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • first pair of nip rolls 250 includes a first nip roll 251 that includes a first corrugated surface 252, and a second nip roll 256 that includes a second corrugated surface 254.
  • Each of the first and second corrugated surfaces 252, 254 have trapezoidal corrugations having a first period Pi and a second period P 2 , respectively.
  • Web 210 includes a center portion 214 and a first edge portion 212, where the first edge portion 212 passes in a serpentine manner through first bending region 260 defined by partially intermeshing first corrugated surface 252 and second corrugated surface 254.
  • FIG. 4D shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • first pair of nip rolls 250 includes a first nip roll 251 that includes a first corrugated surface 25
  • first period Pi and second period P 2 of corrugations are equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are aligned, that is, the first and second periods Pi, P 2 overlap.
  • first corrugated surface 252 can intermesh with second corrugated surface 254 such that the corrugations are misaligned, for example, in a manner similar to that shown in FIGS. 4B-4C.
  • FIG. 4E shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • Each of the elements 210-260 shown in FIG. 4E correspond to like-numbered elements 210-260 shown in FIG. 4D, which have been described previously.
  • first period Pi and second period P 2 of corrugations are not equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that a portion of the corrugations are aligned.
  • first corrugated surface 252 can intermesh with second corrugated surface 254 such that a portion of the corrugations are misaligned, for example, in a manner similar to that shown in FIGS. 4B-4C.
  • FIG. 4F shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • first pair of nip rolls 250 include a first nip roll 251 that includes a first corrugated surface 252, and a second nip roll 256 that includes a second corrugated surface 254.
  • Each of the first and second corrugated surfaces 252, 254 have dissimilar shaped corrugations having a first period Pi and a second period P 2 , respectively.
  • Web 210 includes a center portion 214 and a first edge portion 212, where the first edge portion 212 passes in a serpentine manner through first bending region 260 defined by partially intermeshing first corrugated surface 252 and second corrugated surface 254.
  • first period Pi and second period P 2 of corrugations are equal, and first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are aligned, that is, the first and second periods Pi, P 2 overlap.
  • first corrugated surface 252 can intermesh with second corrugated surface 254 such that the corrugations are misaligned, for example, in a manner similar to that shown in FIGS. 4B-4C.
  • FIG. 4G shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure. In FIG.
  • first pair of nip rolls 250 includes a first nip roll 251 that includes a first corrugated surface 252, and a second nip roll 256 that includes a second corrugated surface 254.
  • Each of the first and second corrugated surfaces 252, 254 have a single corrugation.
  • Web 210 includes a center portion 214 and a first edge portion 212, where the first edge portion 212 passes in a serpentine manner through first bending region 260 defined by partially intermeshing first corrugated surface 252 and second corrugated surface 254.
  • first corrugated surface 252 intermeshes with second corrugated surface 254 such that the corrugations are aligned.
  • first corrugated surface 252 can intermesh with second corrugated surface 254 such that the corrugations are misaligned, for example, in a manner similar to that shown in FIGS. 4B-4C.
  • FIG. 4H shows a schematic cross-section of a first pair of nip rolls 250 according to one aspect of the disclosure.
  • first pair of nip rolls 250 includes a first nip roll 251 that includes a first corrugated surface 252, and a second nip roll 256 that includes a second corrugated surface 254.
  • Each of the first and second corrugated surfaces 252, 254 have multiple corrugations, for example, sinusoidal, trapezoidal, dissimilar shaped, or the like, having a first period Pi and a second period P 2 , respectively.
  • Web 210 includes a center portion 214 and a first edge portion 212, where the first edge portion 212 passes in a serpentine manner through first bending region 260 defined by partially intermeshing first corrugated surface 252 and second corrugated surface 254.
  • first corrugated surface 252 intermeshes with second corrugated surface 254 such that the respective corrugations are aligned, that is, the first and second periods Pi, P 2 overlap.
  • first corrugated surface 252 can intermesh with second corrugated surface 254 such that the corrugations are misaligned, for example, in a manner similar to that shown in FIGS. 4B-4C.
  • FIG. 5 is a perspective schematic of a web slitter 500 according to one aspect of the disclosure.
  • Web slitter 500 includes web 210 having a center portion 214, a first edge portion 212, and a second edge portion 212', moving in downweb direction 501.
  • Web 210 passes over first idler roll 520 and second idler roll 530 and is kept taut by a tension difference between an upweb tension Tu , a downweb tension T D , and a crossweb tension Tc.
  • the tension difference (T D -Tu) is a positive tension, since the web is moving in the downweb direction 501, and T D must be greater than Tu.
  • Web slitter 500 further includes a first pair of corrugated nip rolls 250 disposed adjacent to the first edge portion 212 and a second pair of corrugated nip rolls 250' disposed adjacent to the second edge portion 212'.
  • a first slitter 590 and a second slitter 590' are disposed on a first and a second cutting line 518, 518', respectively.
  • First and second cutting line 518, 518' separate first and second edge portion 212, 212' from center portion 214, respectively, and first and second slitters 590, 590' sever web 210 along first and second cutting line 518, 518' into first weed 516, center portion 214, and second weed 516'.
  • First and second pairs of corrugated nip rolls 250, 250' can include any of the corrugated nip rolls described elsewhere in this application.
  • First and second pairs of corrugated nip rolls 250, 250' can be angled or canted at a first and a second angle ⁇ , ⁇ ' relative to the crossweb tension Tc direction, as described elsewhere.
  • first and second angle ⁇ , ⁇ ' can range from about 0 degrees to about 20 degrees, from about 0 degrees to about 10 degrees, or from about 0 degrees to about 5 degrees.
  • FIG. 6 is a cross-sectional downweb view of a web slitter 600 according to one aspect of the disclosure.
  • FIG. 6 shows a section through the crossweb tension Tc direction in a manner similar to the web tensioner 300 shown in FIG. 3.
  • Each of the elements 210- 260 shown in FIG. 6 correspond to like -numbered elements 210-260 shown in FIG. 3, which have been described previously.
  • the web slitter 600 includes a first slitter 690 disposed to intersect and cut the web 210 between the first edge portion 212 and the center portion 214 of the web 210.
  • the web slitter 600 can also include a second slitter 690' disposed to intersect and cut the web 210 between the second edge portion 212 and the center portion 214 of the web 210. Either one or both of the first and second slitters 690, 690' can be used.
  • both the first and the second slitters 690, 690' can be used, and are known to those of skill in the art, including, for example, knife edges, rotary slitters, laser slitters, waterjet slitters, airjet slitters, and the like, or a combination thereof.
  • At least one of the first and second slitters 690, 690' can include a pair of circular driven knives (for example, a rotary slitter), an example of which is shown in FIG. 6.
  • First and second slitter 690, 690' includes first circular driven knife 692, 692' and second circular driven knife 694, 694', respectively.
  • Circular driven knife slitters are well known to those of skill in the art.
  • the first and second nip rolls (251, 256) and the first and second driven knifes (692, 694) can be driven, that is, with a first and a second motor 696, 698.
  • a single motor can be used to drive the first and second nip rolls (251, 256) and the first and second driven knifes (692, 694), with appropriate gear reductions to control the relative speeds of both the nip rolls and the driven knifes.
  • the motor(s) and gearing can be disposed closer to the center web portion 214 as shown for the second pair of nip rolls 250', or they can be disposed extending outside of the web 210 as shown for the first pair of nip rolls 250.

Landscapes

  • Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Winding Of Webs (AREA)
  • Treatment Of Fiber Materials (AREA)
PCT/US2010/052137 2009-10-13 2010-10-11 Corrugated edge nip Ceased WO2011046854A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US13/500,154 US9038879B2 (en) 2009-10-13 2010-10-11 Corrugated edge nip
CN201080043624.1A CN102548879B (zh) 2009-10-13 2010-10-11 波纹边缘轧辊
JP2012534261A JP5785174B2 (ja) 2009-10-13 2010-10-11 波形縁ニップ
EP10823887.4A EP2488431A4 (en) 2009-10-13 2010-10-11 PULLED ROLLERS WITH CORRUGATED EDGES
KR1020127011736A KR101730677B1 (ko) 2009-10-13 2010-10-11 웨브 인장기, 웨브 슬리터, 및 웨브에 측방향 장력을 인가하는 방법
US14/695,472 US9725270B2 (en) 2009-10-13 2015-04-24 Corrugated edge nip

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US25100709P 2009-10-13 2009-10-13
US61/251,007 2009-10-13

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US13/500,154 A-371-Of-International US9038879B2 (en) 2009-10-13 2010-10-11 Corrugated edge nip
US14/695,472 Division US9725270B2 (en) 2009-10-13 2015-04-24 Corrugated edge nip

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WO2011046854A2 true WO2011046854A2 (en) 2011-04-21
WO2011046854A3 WO2011046854A3 (en) 2011-08-18

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EP (1) EP2488431A4 (enExample)
JP (1) JP5785174B2 (enExample)
KR (1) KR101730677B1 (enExample)
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CN102548879B (zh) 2016-08-24
EP2488431A2 (en) 2012-08-22
US9038879B2 (en) 2015-05-26
US9725270B2 (en) 2017-08-08
US20150232294A1 (en) 2015-08-20
WO2011046854A3 (en) 2011-08-18
CN102548879A (zh) 2012-07-04
JP2013507306A (ja) 2013-03-04
KR20120086708A (ko) 2012-08-03
US20120193463A1 (en) 2012-08-02
JP5785174B2 (ja) 2015-09-24
KR101730677B1 (ko) 2017-04-26
EP2488431A4 (en) 2014-03-26

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