EP1235733A1 - Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material - Google Patents

Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material

Info

Publication number
EP1235733A1
EP1235733A1 EP00984032A EP00984032A EP1235733A1 EP 1235733 A1 EP1235733 A1 EP 1235733A1 EP 00984032 A EP00984032 A EP 00984032A EP 00984032 A EP00984032 A EP 00984032A EP 1235733 A1 EP1235733 A1 EP 1235733A1
Authority
EP
European Patent Office
Prior art keywords
end portion
bottom end
top end
stack
web material
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.)
Withdrawn
Application number
EP00984032A
Other languages
German (de)
French (fr)
Inventor
Martin Scaife
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.)
Procter and Gamble Co
Original Assignee
Procter and Gamble 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 Procter and Gamble Co filed Critical Procter and Gamble Co
Priority to EP00984032A priority Critical patent/EP1235733A1/en
Publication of EP1235733A1 publication Critical patent/EP1235733A1/en
Withdrawn legal-status Critical Current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
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/18—Attaching, e.g. pasting, the replacement web to the expiring web
    • B65H19/1842—Attaching, e.g. pasting, the replacement web to the expiring web standing splicing, i.e. the expiring web being stationary during splicing contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H21/00—Apparatus for splicing 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
    • B65H45/00—Folding thin material
    • B65H45/02—Folding limp material without application of pressure to define or form crease lines
    • B65H45/06—Folding webs
    • B65H45/10—Folding webs transversely
    • B65H45/101—Folding webs transversely in combination with laying, i.e. forming a zig-zag pile
    • 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
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4216—Forming a pile of web folded in zig-zag form
    • B65H2301/42162—Juxtaposing several piles
    • 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
    • B65H2701/18—Form of handled article or web
    • B65H2701/182—Piled package
    • B65H2701/1824—Web material folded in zig-zag form
    • B65H2701/18242—Juxtaposed sets

Definitions

  • the present invention provides an apparatus for splicing a strip of material packaged in stacks arranged parallel to each other.
  • the supply of web materials has the advantage that large quantities of the material can be supplied to the manufacturing process as a single piece of web material.
  • the web material may be supplied as roll stock or in festooned form. The latter form is preferred when the web material has a relatively large thickness dimension such that the lifetime of a roll of this material would be relatively short.
  • the process of the present invention allows splicing of parallel stacks of web material with increased speed and increased accuracy compared to splicing by hand.
  • the present invention provides a method for splicing the end connecting portion of a first stack in a multi-lane festooned package of web material to the beginning portion of the second stack of web material within the same package.
  • a web material refers to a sheet-like material, or to a composite or laminate comprising two or more sheet-like materials.
  • a web material can be a fibrous web, a non-fibrous web, a woven web, a nonwoven web, a foam, a film, or the like.
  • the web material has a longitudinal dimension, a transverse dimension, and a thickness dimension.
  • the longitudinal dimension of the material is substantially larger than the transverse dimension and than the thickness dimension.
  • the material is supplied to the manufacturing process along the longitudinal dimension. Accordingly, the material is ideally rendered virtually infinite in the longitudinal dimension by splicing together a plurality of stretches of web material.
  • the pieces of material suitable for incorporation into the article manufacture are obtained.
  • the pieces of material which are incorporated into the article manufacture have the same transverse dimension and thickness dimension as the web material. Due to the sheet like nature of the web material, the thickness dimension is typically smaller than the thickness dimension.
  • multi-lane festooned package of web material refers to a plurality of stacks of web material which are arranged in parallel. Within the individual stacks, the material is folded in a zigzag fashion and extends continuously from a bottom end portion to a top end portion where the material is folded at lines substantially perpendicular to the longitudinal dimension of the web material.
  • the individual stacks of the multilane festooned package may be completely independent of each other or the individual stacks may be separated from each other by a perforation line. If the individual stacks are only separated by a perforation line, the overall stability of the package is increased.
  • a Cartesian coordinate system is defined relative to the multilane festooned package of web material which is to be spliced by the process of the present invention.
  • the x — dimension of this coordinate system is defined to be substantially parallel to the fold lines of the material within the individual stacks, i.e. the side surfaces of the individual stacks are perpendicular to the x — direction.
  • the y — dimension is defined to be substantially parallel to the longitudinal dimension of the web material in between the folds.
  • the z — dimension is defined to be height dimension of the individual stacks, i.e. the z ⁇ dimension is perpendicular to the major surface is of the web material in between the folds.
  • multi-lane festooned packages of material are particularly useful in the manufacture of disposable articles, in particular disposable absorbent articles such as diapers, sanitary napkins, adult incontinence products, bed mats, bibs, and the like.
  • the process of the present invention comprises a step of holding the bottom end portion of the first stack of web material.
  • the process further comprises a step of holding the top end portion of the second stack of web material.
  • the process of the present invention may comprise stacks of automatically locating and grabbing the bottom end portion and/or the top end portion from the multilane festooned package of web material.
  • the process of the present invention may further comprise steps of separating the bottom end portion and/or top end portion from a neighboring bottom end portion or top end portion respectively.
  • the quality of the perforation may checked automatically while performing the splice.
  • the process of the present invention comprises a further step of reversely rotating the bottom end portion around its transverse edge and/or reversely rotating the top end portion around its transverse edge until the longitudinal tangential vector of the bottom end portion forms an angle of between 90° and 270°, preferably between 120° and 240°, more preferably between 150° and 210°, most preferably about 180° with the longitudinal tangential vector of the top end portion.
  • the longitudinal tangential vector of the end portions are considered to be tangential to the major surface of the web material in a longitudinal direction pointing away from the respective end portion.
  • reverse rotation refers to that rotation which turns the inner major surface of the respective end portion to the outside.
  • the inner major surface of the respective and portion is defined to be that major surface which faces the remainder of the stack of web material to which the end portion belongs.
  • the process of the present invention comprises a step of joining the bottom end portion to the top end portion.
  • suitable joining processes are known in the art including but not limited to ultrasonic bonding, adhesive bonding, thermobonding, pressure bonding, sewing, and the like.
  • the process of ultrasonic bonding is particularly preferred for its low impact on to the web material. Depending on the specific material properties of the web material, however, the most suitable joining process will be readily apparent to the skilled person.
  • the step of joining also comprises the relative positioning of the bottom end portion and the top end portion to be accessible for splicing. During such positioning care has to be taken to not entangle the bottom end portion with the top end portion.
  • Movements of at least one of the end portions in the respective transverse direction may assist in resolving potential entanglement problems.
  • the bottom end portion and the top end portion may be positioned relative to each other such that the bottom end portion is on top of and overlapping the top end portion.
  • the bottom end portion of the top end portion may be arranged prior to joining such that to transverse edges contact each other so that the two end portions are joined in non-overlapping fashion.
  • an additional piece of material may be joined to the two end portions of support such a non- overlapping splice.
  • the process of the present invention optionally comprises a step of positioning the transverse edge of the bottom end portion and the transverse edge of the top end portion such that both edges are substantially parallel to each other prior to joining the bottom end portion to the top end portion.
  • Such arrangement of the end portions will contribute to the quality of the splices.

Landscapes

  • Absorbent Articles And Supports Therefor (AREA)
  • Replacement Of Web Rolls (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

The present invention provides a method for splicing a strip of material packaged in stacks arranged parallel to each other. The method comprises a step of reversely rotating the bottom end portion around the transverse edge of the bottom end portion and/or reversely rotating the top end portion around the transverse edge of the bottom end portion until the longitudinal tangential vector of the bottom end portion forms an angle of 90 and 270 degrees with the longitudinal tangential vector of the top end portion.

Description

Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material
FIELD OF THE INVENTION
The present invention provides an apparatus for splicing a strip of material packaged in stacks arranged parallel to each other.
BACKGROUND
In online manufacturing of articles, materials are often supplied as web materials and subsequently cut into pieces during the manufacturing process. The supply of web materials has the advantage that large quantities of the material can be supplied to the manufacturing process as a single piece of web material. The web material may be supplied as roll stock or in festooned form. The latter form is preferred when the web material has a relatively large thickness dimension such that the lifetime of a roll of this material would be relatively short.
Packages of festooned web material are well known in the art and are described for example in documents US-A-3 729 367 (Shore), EP-A-0 366 038 (Felix), EP-A-0 383 501 (Foster).
There have also been described, see for example WO-A-98/58864 (O'Connor et al.), packages of festooned web material in which a plurality of stacks of the material has been arranged in side-by-side fashion such that by splicing the end of one that to the beginning of the neighboring stack one continuous strip of web material can be obtained. The slices, however, had to be carried out by hand in particular because the arrangement of the stacks requires that one of the into pieces is twisted by an annual 360 degrees around the longitudinal dimension of the web material. Therefore, it has been an object of the present invention to provide an apparatus and a process for automatic splicing of neighboring stacks of festooned web material.
SUMMARY OF THE INVENTION
The process of the present invention allows splicing of parallel stacks of web material with increased speed and increased accuracy compared to splicing by hand.
DETAILED DESCRIPTION OF THE INVENTION
The present invention provides a method for splicing the end connecting portion of a first stack in a multi-lane festooned package of web material to the beginning portion of the second stack of web material within the same package.
The term "web material" as used herein refers to a sheet-like material, or to a composite or laminate comprising two or more sheet-like materials. For example, a web material can be a fibrous web, a non-fibrous web, a woven web, a nonwoven web, a foam, a film, or the like. The web material has a longitudinal dimension, a transverse dimension, and a thickness dimension. The longitudinal dimension of the material is substantially larger than the transverse dimension and than the thickness dimension. Typically, the material is supplied to the manufacturing process along the longitudinal dimension. Accordingly, the material is ideally rendered virtually infinite in the longitudinal dimension by splicing together a plurality of stretches of web material. By cutting the web material perpendicular to the longitudinal dimension, pieces of the material suitable for incorporation into the article manufacture are obtained. Typically, the pieces of material which are incorporated into the article manufacture have the same transverse dimension and thickness dimension as the web material. Due to the sheet like nature of the web material, the thickness dimension is typically smaller than the thickness dimension.
The term "multi-lane festooned package of web material" as used herein refers to a plurality of stacks of web material which are arranged in parallel. Within the individual stacks, the material is folded in a zigzag fashion and extends continuously from a bottom end portion to a top end portion where the material is folded at lines substantially perpendicular to the longitudinal dimension of the web material. The individual stacks of the multilane festooned package may be completely independent of each other or the individual stacks may be separated from each other by a perforation line. If the individual stacks are only separated by a perforation line, the overall stability of the package is increased. Examples for multi-lane festooned packages of web material can be found in documents US-A-3 729 367 (stacks separated by perforation) and WO-A- 98/58864 (individual stacks), both documents being incorporated herein by reference. For the purpose of the present invention, a Cartesian coordinate system is defined relative to the multilane festooned package of web material which is to be spliced by the process of the present invention. The x — dimension of this coordinate system is defined to be substantially parallel to the fold lines of the material within the individual stacks, i.e. the side surfaces of the individual stacks are perpendicular to the x — direction. The y — dimension is defined to be substantially parallel to the longitudinal dimension of the web material in between the folds. Accordingly, the z — dimension is defined to be height dimension of the individual stacks, i.e. the z ~ dimension is perpendicular to the major surface is of the web material in between the folds.
For example, multi-lane festooned packages of material are particularly useful in the manufacture of disposable articles, in particular disposable absorbent articles such as diapers, sanitary napkins, adult incontinence products, bed mats, bibs, and the like.
To be able to provide a long-lasting supply of web material to the process of manufacture, it is desirable to connect the different stacks of the material by splicing the bottom and portion of one stack to the top end portion of the neighboring stack or any other stack. As is readily apparent to the skilled person, such a splice requires a 360 ° twist around the longitudinal dimension of one of the end portions to be connected. This is particularly true for two sided web materials, i.e. for those materials which have a first major surface which is different from the second major surface.
The process of the present invention comprises a step of holding the bottom end portion of the first stack of web material. The process further comprises a step of holding the top end portion of the second stack of web material. Optionally, the process of the present invention may comprise stacks of automatically locating and grabbing the bottom end portion and/or the top end portion from the multilane festooned package of web material. In case the individual stacks of the package are separated by lines of perforation, the process of the present invention may further comprise steps of separating the bottom end portion and/or top end portion from a neighboring bottom end portion or top end portion respectively. In case material has to be separated by tearing open a perforation, the quality of the perforation may checked automatically while performing the splice.
After holding the bottom end portion of the first stack of web material and after holding the top end portion of the second stack of web material, the process of the present invention comprises a further step of reversely rotating the bottom end portion around its transverse edge and/or reversely rotating the top end portion around its transverse edge until the longitudinal tangential vector of the bottom end portion forms an angle of between 90° and 270°, preferably between 120° and 240°, more preferably between 150° and 210°, most preferably about 180° with the longitudinal tangential vector of the top end portion. The longitudinal tangential vector of the end portions are considered to be tangential to the major surface of the web material in a longitudinal direction pointing away from the respective end portion. The term "reverse rotation" as used herein refers to that rotation which turns the inner major surface of the respective end portion to the outside. In this context, the inner major surface of the respective and portion is defined to be that major surface which faces the remainder of the stack of web material to which the end portion belongs. As have surprisingly be found, the step of reversely rotating in the bottom end portion and/or the top end portion and the subsequent joining of the two end portions yields the 360 ° twist around the longitudinal dimension of the web material required for continuous de-festooning.
Subsequent to the reverse rotation of the bottom end portion and/or the top end portion, the process of the present invention comprises a step of joining the bottom end portion to the top end portion. A wide variety of suitable joining processes are known in the art including but not limited to ultrasonic bonding, adhesive bonding, thermobonding, pressure bonding, sewing, and the like. The process of ultrasonic bonding is particularly preferred for its low impact on to the web material. Depending on the specific material properties of the web material, however, the most suitable joining process will be readily apparent to the skilled person. The step of joining also comprises the relative positioning of the bottom end portion and the top end portion to be accessible for splicing. During such positioning care has to be taken to not entangle the bottom end portion with the top end portion. Movements of at least one of the end portions in the respective transverse direction may assist in resolving potential entanglement problems. For the joining of the bottom end portion to the top end portion, the bottom end portion and the top end portion may be positioned relative to each other such that the bottom end portion is on top of and overlapping the top end portion. Alternatively, the bottom end portion of the top end portion may be arranged prior to joining such that to transverse edges contact each other so that the two end portions are joined in non-overlapping fashion. Optionally, an additional piece of material may be joined to the two end portions of support such a non- overlapping splice.
The process of the present invention optionally comprises a step of positioning the transverse edge of the bottom end portion and the transverse edge of the top end portion such that both edges are substantially parallel to each other prior to joining the bottom end portion to the top end portion. Such arrangement of the end portions will contribute to the quality of the splices.
Whist in the present description, only the consecutive splicing of a plurality of neighboring has been described, the concept of the process of the present invention may also be applied to simultaneous splicing of a plurality of bottom end portion to the respective top end portion or vice versa. Such a simultaneous process is also considered to form part of the present invention.
It is considered that the construction of an apparatus to carry out the process of the present invention lies within the customary practice of the person skilled in the art. It is further considered that the deployment of servo motors which may be controlled by a computer program in combination with sensors, in particular optical sensors, is beneficial for the construction of such an apparatus.

Claims

WHAT IS CLAIMED IS:
1. A process for splicing the bottom end portion of a web material in a first stack to a top end portion of a web material in a second stack, said process comprising the following steps
— providing a first stack of web material
— providing a second stack of web material
— arranging said second stack parallel to said first stack
~ holding said bottom end portion of said first stack of web material
— holding said top end portion of said second stack of web material
— reversely rotating said bottom end portion around the transverse edge of said bottom end portion and/or reversely rotating said top end portion around the transverse edge of said bottom end portion until the longitudinal tangential vector of the bottom end portion forms and angle of 90 and 270 degrees with the longitudinal tangential vector of the top end portion
— joining said bottom end portion to said top end portion
2. A process according to claim 1 wherein said process further comprises the step of automatically locating and grabbing said bottom end portion.
3. A process according to claim 2 wherein said process further comprises a step of separating said bottom end portion from a second bottom end portion by tearing a perforation line.
4. A process according to claim 1 wherein said process further comprises the step of automatically locating and grabbing said top end portion.
5. A process according to claim 4 wherein said process further comprises a step of separating said top end portion from a second top end portion by tearing a perforation line.
6. A process according to claim 1 wherein said process further comprises a step of positioning the transverse edge of said bottom end portion and the transverse edge of the top end portion such that both edges are substantially parallel prior to joining said bottom end portion to said top end portion.
7. A process according to claim 1 wherein said bottom end portion and said top end portion are positioned relative to each other such that said bottom end portion is on top of and overlapping said top end portion prior to joining said bottom end portion to said top end portion.
8. A process according to claim 1 wherein said bottom end portion is joined to said top end portion by means of ultrasonic bonding.
9. A process according to claim 1 wherein said first stack of web material and said second stack of web material are comprised in the same multilane festooned package of web material.
10. A process according to claim 1 wherein said web material is a nonwoven material, preferably a highloft nonwoven material.
EP00984032A 1999-12-10 2000-12-08 Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material Withdrawn EP1235733A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP00984032A EP1235733A1 (en) 1999-12-10 2000-12-08 Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP99124638A EP1106553A1 (en) 1999-12-10 1999-12-10 Process for splicing the bottom end portion of a first stack of web material and the top end portion of a second stack of the material
EP99124638 1999-12-10
EP00984032A EP1235733A1 (en) 1999-12-10 2000-12-08 Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material
PCT/US2000/033251 WO2001042119A1 (en) 1999-12-10 2000-12-08 Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material

Publications (1)

Publication Number Publication Date
EP1235733A1 true EP1235733A1 (en) 2002-09-04

Family

ID=8239578

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99124638A Withdrawn EP1106553A1 (en) 1999-12-10 1999-12-10 Process for splicing the bottom end portion of a first stack of web material and the top end portion of a second stack of the material
EP00984032A Withdrawn EP1235733A1 (en) 1999-12-10 2000-12-08 Process for splicing the bottom end portion of the first stack of web material and the top end portion of the second stack of the material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP99124638A Withdrawn EP1106553A1 (en) 1999-12-10 1999-12-10 Process for splicing the bottom end portion of a first stack of web material and the top end portion of a second stack of the material

Country Status (4)

Country Link
EP (2) EP1106553A1 (en)
JP (1) JP2003516289A (en)
AU (1) AU2071201A (en)
WO (1) WO2001042119A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6673185B1 (en) 2001-12-20 2004-01-06 Kimberly-Clark Worldwide, Inc. Process for splicing blocks of multi-lane festooned material
US6866213B2 (en) 2001-12-28 2005-03-15 Kimberely-Clark, Worldwide, Inc. Rolled web products having a web wound in an oscillating fashion
US6641080B2 (en) 2001-12-28 2003-11-04 Kimberly-Clark Worldwide, Inc. Method and apparatus for winding a web

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2227994B (en) * 1989-02-14 1993-06-23 Almex Control Systems Ltd Feeding system for fanfold web in cassettes
US5658638A (en) * 1995-09-18 1997-08-19 Hurletron Incorporated Insert card packaging method
AU734791B2 (en) * 1997-06-19 2001-06-21 Bki Holding Corporation Packaging a strip of material

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0142119A1 *

Also Published As

Publication number Publication date
AU2071201A (en) 2001-06-18
WO2001042119A1 (en) 2001-06-14
JP2003516289A (en) 2003-05-13
EP1106553A1 (en) 2001-06-13

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