WO2008106482A2 - Dispositif de transport de bande continue comprenant un ensemble rouleau de guidage comportant une couche extérieure déformable élastiquement - Google Patents

Dispositif de transport de bande continue comprenant un ensemble rouleau de guidage comportant une couche extérieure déformable élastiquement Download PDF

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Publication number
WO2008106482A2
WO2008106482A2 PCT/US2008/055068 US2008055068W WO2008106482A2 WO 2008106482 A2 WO2008106482 A2 WO 2008106482A2 US 2008055068 W US2008055068 W US 2008055068W WO 2008106482 A2 WO2008106482 A2 WO 2008106482A2
Authority
WO
WIPO (PCT)
Prior art keywords
web
film web
guide roller
handling
accordance
Prior art date
Application number
PCT/US2008/055068
Other languages
English (en)
Other versions
WO2008106482A3 (fr
Inventor
Danford C. Anderson
Original Assignee
Hudson-Sharp Machine Company
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
Priority claimed from US11/711,964 external-priority patent/US20080203132A1/en
Application filed by Hudson-Sharp Machine Company filed Critical Hudson-Sharp Machine Company
Publication of WO2008106482A2 publication Critical patent/WO2008106482A2/fr
Publication of WO2008106482A3 publication Critical patent/WO2008106482A3/fr

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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
    • 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
    • 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
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/18—Rollers composed of several layers
    • B65H2404/185—Rollers composed of several layers easy deformable

Definitions

  • the present invention relates generally to apparatus for handling film webs, such as in connection with manufacture of bags or pouches, and more particularly to a web-handling apparatus including one or more guide roller assemblies which includes an outer layer of resiliently deformable material which can accommodate irreguiarities in the associated film web, and otherwise promote efficient and precise web handling.
  • Apparatus are known for handling film webs, typically polymeric material, in connection with the manufacture of bags, pouches, and like articles. During manufacture of such articles, it is frequently necessary for folds and/or gussets to be formed in the film web, which can thereby result in certain portions of the web, along the longitudinal direction thereof, being thicker than adjacent portions.
  • fluted rollers can undesirably mark or crease the film web, and experience has shown that fluted rollers are not always effective for handling some types of film material.
  • Another problem associated with handling of film webs concerns the extensibility of the web as it is moved, such as between successive rollers and a web-handling apparatus.
  • the extensibility of the web can undesirably detract from precise handling, and can in some instances mandate use of relatively expensive servo-operated nip-rolls, in order to achieve the necessary level of web-handling precision.
  • the present invention is directed to an improved web-handling apparatus having at least one guide roller which is configured to facilitate efficient and precise handling of film webs, including those having irregularities, such as folds, gussets, and/or zipper assemblies.
  • the present invention is directed to a web-handling apparatus comprising at least one guide roller assembly about which an associated film web is guided.
  • the guide roller assembly includes an outer layer of resiliently deformable materia), which in a presently preferred embodiment, comprises polyurethane foam.
  • a web-handling apparatus embodying the principles of the present invention can include a plurality of guide roller assemblies having resiliently deformable outer surfaces, with the guide roller assemblies desirably cooperating to create a "tension zone" within which the extensibility of the web is held in check and controlled by resilient deformation of the guide roller assemblies. Excessive stretching of the film web is thus desirably avoided.
  • Another aspect of the present invention concerns configuring the guide roller assembly of the web-handling apparatus so that the resiliently deformable outer layer thereof has a width greater than the width of the associated film web. This desirably acts to create relatively uncompressed regions of the outer layer, at respective opposite margins of the film web, which regions desirably act to flatten the film web across the guide roller assembly.
  • a further aspect of the present apparatus relates to providing a dancer roller arm, mounted for pivotal movement, upon which the guide roller assembly is mounted for rotation about its rotational axis.
  • the rotational axis, and thus the guide roller assembly is movable through an arc attendant to intermittent motion of an associated film web, with the resiliency deformable outer surface of the guide roller assembly desirably acting to absorb sudden tension loads exerted on the film web.
  • the polyurethane foam material is affixed to an inner, cylindrical core of the roller assembly, with the core preferably comprising aluminum.
  • the polyurethane foam comprises open-celled foam, with a most preferred form comprising about 80% open-celled foam.
  • a material which exhibited particularly desirable performance exhibits a Compression Load Deflection of about 25% at 4 to 7 percent per square inch (pst).
  • FIGURE 1 is a diagrammatic view of a web-handling apparatus including a guide roller assembly embodying the principles of the present invention
  • FIGURE 2 is a diagrammatic, cross-sectional view of the guide roller assembly illustrated in FIGURE 1 , illustrating handling of a gusseted film web
  • FIGURE 3 is a diagrammatic view of a side-gusseted film web
  • FIGURE 4 is a diagrammatic view of a film web having a zipper assembly applied thereto, illustrating the effect of this type of irregularity on the film web when positioned in association with a conventional guide roller assembly;
  • FIGURE 5 is a diagrammatic view illustrating the guide roller assembly of the present web-handling apparatus handling a film web with a zipper fastener assembly applied thereto;
  • FIGURE 6 is a diagrammatic view of the present guide roller assembly illustrating handling of the film web having a zipper fastener assembly applied thereto;
  • FIGURE 7 is a diagrammatic view of a pair of guide roller assemblies configured in accordance with the present invention, wherein a tension zone is created in the film web between the guide roller assemblies;
  • FIGURE 8 is a diagrammatic view illustrating resilient deformation of a guide roller assembly configured in accordance with the present invention, with the arrangement desirably facilitating flattening of the associated film web;
  • FIGURE 9 is a diagrammatic view illustrating use of the guide roller assembly of the present invention in association with a dancer roller arm of the associated web-hand ⁇ ng apparatus.
  • the roller assembly 10 includes an inner, cylindrical core 12, and an outer layer 14 affixed to the cylindrical core.
  • the cylindrical core 12 is preferably formed from aluminum, although other materials can be employed without departing from the present invention.
  • the outer layer 14 of the roller assembly comprises resiliency deformable material, preferably polyurethane foam.
  • resiliency deformable material preferably polyurethane foam.
  • W 1 such as comprising gusseted film (see FIGURE 3).
  • a film web of this nature exhibits irregularities in the form of variations in thicknesses across the width of the film, typically along the longitudinal direction thereof, inwardly extending side gussets, folds, and other irregularities can undesirably induce wrinkling or the like attendant to web-handling, particularly when the film web is guided about an associated roller assembly for more than about 45 degrees of its circumference.
  • CLD Compression Load Deflection
  • an aluminum roller having a diameter of 3 inches, and a 0.047 inch wall thickness at any face width has been employed for the inner cylindrical core 12, with a foam coating 14 affixed thereto having a 0.125 inch thickness.
  • a polyurethane foam material available from American Roller, under the product designation Pegasus, PN 200 has been successfully employed. This material is a combination of about 20% closed cell foam and 80% open-cell foam, although the percentage of opened/closed ceils can be varied while keeping with the principles disclosed herein. Additionally, while use of foam material is presently preferred, it will be recognized that the outer layer of the present guide roller can be provided in the form of other suitably resiliently deformable materials.
  • FIGURE 2 is a diagrammatic view illustrating the manner in which a gusseted film web can resiliently deform the outer foam layer 14 of the present guide roller assembly, while the outer film layer of the web remains tightly wrapped without stretching, as the foam material allows the inner film layers to deform without wrinkling.
  • An additional benefit of the present invention is that it solves problems typically associated with running a web of film material that has one or more zipper-like fastener assemblies secured thereto.
  • the present invention provides a distinct improvement over grooved or otherwise relieved rollers.
  • the foam covered roller of the present invention supports the film on both sides of the zipper, and still desirably holds the zipper assembly in place and in-line.
  • FIGURE 4 illustrates a film having a zipper assembly Z secured thereto, when drawn about a conventional roller R having a relatively non-deformable outer surface.
  • a further virtue of the presently preferred polyurethane foam material, such as described above, is that the machine can be readily machined as may be required for guide roller formation.
  • FIGURE 7 therein is diagrammatically illustrated a web- handiing apparatus of the present invention, wherein a pair of the guide roller assemblies 10 are provided for rotation on respective rotational axes A to create a tension zone Z in the film web between the guide roller assemblies.
  • the web across the foam-covered guide roller assemblies 10 has a tension that is equal to the P.L.I, (pressure per linear inch) across those roller assemblies.
  • P.L.I pressure per linear inch
  • the foam will compress.
  • the extensibility of the web is held in check by the compliance of the foam.
  • the web is released to the tension zone by the upstream roller assembly, and taken up by the downstream rolller assembly as it compresses.
  • the web will not stretch until ail of the available compression of the foam is used up, or the extensibility of the web is exceeded by the compression ratio of the foam.
  • the upstream roller delivers the film and relieves compression, while the downstream roller takes up the relieved web by compressing.
  • the axes A of the guide roller assemblies 10 are illustrated as being generally parallel to each other, but it is within the purview of the present invention that the axes may be arranged in a non-parallel orientation.
  • stretching of the web is desirably avoided, and the web does not clamp itself onto these process components.
  • This desirable benefit of the present invention avoids the need for relatively expensive servo-activated rollers or the like.
  • FIGURE 8 illustrates another desirable benefit of the guide roller assembly 10 of the present invention, wherein the resiliently deformable outer surface 14 of the guide roller assembly 10 has a width which is greater than the width of the associated film web W.
  • This arrangement takes advantage of the known phenomenon wherein a film web being handled tends to "ride to a high spot" (that is, a point of high tension) on an associated roller.
  • the film web acts to compress the deformable outer surface of the guide roller assembly 10 on which the web is wrapped.
  • the result is the creation of relatively uncompressed regions of the outer layer 14 at respective opposite margins of the film web W, which regions act to flatten the film web across the guide roller assembly.
  • each edge of the film is against a "high spot", because the web is essentially in a valley. As a consequence, each edge is pulled outwardly, and the web is desirably flattened.
  • FIGURE 9 illustrates a further aspect of the present invention which desirably promotes efficient web handling.
  • FIGURE 9 illustrates the provision of a dancer roller arm 16 mounted for pivotal movement, with a guide roller assembly 10 mounted for rotation about an axis A, so that the axis is movable through an arc attendant to intermittent motion of an associated film web.
  • the resilientiy deformable surface of the guide roller assembly desirably absorbs the sudden forward pull by compressing at the beginning of the forward pull. This arrangement desirably results in increased web-handling speed.

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  • Making Paper Articles (AREA)

Abstract

L'invention concerne un dispositif de transport de bande continue qui comprend au moins un ensemble rouleau de guidage comportant un noyau cylindrique intérieur et une couche extérieure fixée à celui-ci. La couche extérieure de l'ensemble rouleau comprend notamment une matière déformable élastiquement, qui contient une mousse de polyuréthanne convenant particulièrement pour cette utilisation. Ce dispositif permet de guider facilement, grâce à l'ensemble rouleau, les irrégularités d'une bande continue de film associée, tels que des soufflets latéraux et/ou des ensembles fixation par fermeture à glissière, et d'éviter la formation de plis ou d'autres contraintes dans ladite bande.
PCT/US2008/055068 2007-02-28 2008-02-27 Dispositif de transport de bande continue comprenant un ensemble rouleau de guidage comportant une couche extérieure déformable élastiquement WO2008106482A2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/711,964 2007-02-28
US11/711,964 US20080203132A1 (en) 2007-02-28 2007-02-28 Web-handling apparatus including guide roller assembly with resiliently deformable outer layer
US11/900,894 US20080203212A1 (en) 2007-02-28 2007-09-13 Web-handling apparatus including guide roller assembly with resiliently deformable outer layer
US11/900,894 2007-09-13

Publications (2)

Publication Number Publication Date
WO2008106482A2 true WO2008106482A2 (fr) 2008-09-04
WO2008106482A3 WO2008106482A3 (fr) 2009-01-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2008/055068 WO2008106482A2 (fr) 2007-02-28 2008-02-27 Dispositif de transport de bande continue comprenant un ensemble rouleau de guidage comportant une couche extérieure déformable élastiquement

Country Status (2)

Country Link
US (1) US20080203212A1 (fr)
WO (1) WO2008106482A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009048686A1 (fr) * 2007-10-11 2009-04-16 Sealed Air Corporation (Us) Appareil, procédé et rouleau de matelassage à tension de bande contrôlée

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235940A (en) * 1964-01-10 1966-02-22 Eastman Kodak Co Paper sheet-feed roller
US4341335A (en) * 1980-10-07 1982-07-27 Sistig Corporation Method and apparatus for controlling tension in a moving material
US6944419B2 (en) * 2002-05-29 2005-09-13 Konica Corporation Image forming apparatus and control method for the same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5186707A (en) * 1988-11-18 1993-02-16 Dowbrands L.P. Electrostatic pinning in a process for gusseting film web
US5388746A (en) * 1990-11-09 1995-02-14 Fmc Corporation Separator/folder bag machine
US5161793A (en) * 1991-02-06 1992-11-10 Fmc Corporation Interleaving apparatus for rolled up segments
US5405561A (en) * 1993-08-31 1995-04-11 Dowbrands L.P. Process for microperforating zippered film useful for manufacturing a reclosable zippered bag
US5566429A (en) * 1994-10-19 1996-10-22 Minigrip, Inc. Extruded zipper with orienting means and method for orienting same
JP3199750B2 (ja) * 1996-01-30 2001-08-20 ヤーゲンベルク パピーアテヒニク ゲゼルシャフト ミット ベシュレンクテル ハフツング 巻き取り機用のロール
JP3808589B2 (ja) * 1997-05-30 2006-08-16 四国化工機株式会社 包装容器製造装置と包装容器製造方法
US6402077B1 (en) * 2001-02-14 2002-06-11 The Goodyear Tire & Rubber Company Winder with variable tension zones
US20030106635A1 (en) * 2001-12-10 2003-06-12 Mladomir Tomic Method for manufacturing a resealable bag

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235940A (en) * 1964-01-10 1966-02-22 Eastman Kodak Co Paper sheet-feed roller
US4341335A (en) * 1980-10-07 1982-07-27 Sistig Corporation Method and apparatus for controlling tension in a moving material
US6944419B2 (en) * 2002-05-29 2005-09-13 Konica Corporation Image forming apparatus and control method for the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009048686A1 (fr) * 2007-10-11 2009-04-16 Sealed Air Corporation (Us) Appareil, procédé et rouleau de matelassage à tension de bande contrôlée

Also Published As

Publication number Publication date
WO2008106482A3 (fr) 2009-01-08
US20080203212A1 (en) 2008-08-28

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