EP1764332B1 - Pile de feuilles entrepliées avec distribution améliorée - Google Patents

Pile de feuilles entrepliées avec distribution améliorée Download PDF

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Publication number
EP1764332B1
EP1764332B1 EP06117870A EP06117870A EP1764332B1 EP 1764332 B1 EP1764332 B1 EP 1764332B1 EP 06117870 A EP06117870 A EP 06117870A EP 06117870 A EP06117870 A EP 06117870A EP 1764332 B1 EP1764332 B1 EP 1764332B1
Authority
EP
European Patent Office
Prior art keywords
tissues
stack
tissue
pack
surface area
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.)
Not-in-force
Application number
EP06117870A
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German (de)
English (en)
Other versions
EP1764332A1 (fr
Inventor
Erwin Paul Mark
Daniel Yugueros-Tarrasón
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 US11/521,004 priority Critical patent/US7571832B2/en
Priority to PCT/IB2006/053326 priority patent/WO2007031971A2/fr
Publication of EP1764332A1 publication Critical patent/EP1764332A1/fr
Application granted granted Critical
Publication of EP1764332B1 publication Critical patent/EP1764332B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/24—Interfolding sheets, e.g. cigarette or toilet papers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/02—Wrapped articles enclosed in rigid or semi-rigid containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D83/00—Containers or packages with special means for dispensing contents
    • B65D83/08—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession
    • B65D83/0894—Containers or packages with special means for dispensing contents for dispensing thin flat articles in succession the articles being positioned relative to one another or to the container in a special way, e.g. for facilitating dispensing, without additional support
    • 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
    • B65H2701/11—Dimensional aspect of article or web
    • B65H2701/112—Section geometry
    • B65H2701/1123—Folded article or web
    • B65H2701/11232—Z-folded
    • 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
    • B65H2701/18271—Piled package of folded sheet material
    • B65H2701/18272—Z-folded

Definitions

  • the invention relates to the field of dispensing tissues such as wipes out of a pack.
  • Tissues are substantially flat articles commonly used in a wide range of applications: Paper tissues, dry wipes, wet wipes, paper handkerchiefs, paper towels and the like are articles of frequent usage. Tissues are generally provided as stacks of multiple tissues enclosed In an envelope (i.e. a hard container or a flexible pouch): typical examples are packs of paper tissues and packs of wet wipes. A dispensing orifice allows for the tissues to be dispensed individually. Alternatively some tissues are presented in a rolled form.
  • the users can encounter a variety of problems.
  • the first tissue of the stack can be difficult to reach and to dispense out of the pack, as it "fall-back" inside the pack upon dispensing of the previous tissue.
  • Another example is technically known as “chaining”: the dispensing of a tissue provokes the simultaneous and undesired dispensing of one, two or more additional tissues.
  • chaining can also be linked to undesired dry-out of the stack of wet-tissues, as more material is exposed out of the pack and promotes the evaporation the wetness of the tissues.
  • US 2003/0116581 discloses an improved stacked sheet assembly including at least a first web and a second web.
  • the first and second webs have various efficient starter folding patterns for releasing the sheet material webs more reliably and consistently.
  • the size of the dispensing orifice of the pack can be optimized to reduce the frequency of the dispensing failures and/or to authorize a better access to the tissues, i.e. minimization of the consequence of "fall-back" events by using larger dispensing opening allowing the fingers to the users to reach more easily the tissues, or narrower dispensing orifice creating more friction on the tissues during dispensing and hence reducing the occurrence of "chaining".
  • the present invention provides a pack of tissues according to claim 1.
  • tissues are articles comprising a substantially flat substrate.
  • Typical tissues of the present invention include sheets of all sorts, fabric, dry and wet wipes for toilet, cosmetic or cleaning use, paper handkerchiefs, kitchen towels, toilet papers, absorbing tissues of all kinds, paper tissues and the like.
  • the substrate of the tissues of the invention is relatively flexible, and in many case relatively soft.
  • the tissue of the invention can be woven or non-woven or partly woven.
  • the substrate of the tissue of the invention can comprise synthetic fibers, natural fibers, fibers derived from natural materials and/or mixtures thereof. Examples of synthetic fibers for the invention include polyethylene, polypropylene, polyamide and polyester fibers.
  • tissue of the invention can be solely made of cellulosic fibers or alternatively solely made of synthetic fibers. Tissues of the invention can also comprise a mixture of synthetic and natural fibers.
  • the tissues of the invention can be made by a variety of conventional manufacturing methods.
  • the tissues of the invention can be dry-laid in an air-laid process, meltblown, spunlace or spun-bonding process.
  • the tissues of the invention can be made in a wet laid process, preferably in conventional or through-air dry papermaking process. Processes mixing wet-laying and air-laying are also envisioned for the tissues of the invention.
  • the substrate of the tissue of the invention After the substrate of the tissue of the invention is made, the substrate can be converted to produce the tissue of the invention. Converting steps can conventionally include one or more of the steps of cutting, surface-treating, brushing, fibers-adding, lotioning, folding and packing the tissues of the invention.
  • the tissues of the invention are wipes, they can be used for cleaning, treating and/or and removing residues from surfaces.
  • the surfaces may include hard surfaces (such as the surface of a piece of furniture or a floor) or soft surfaces, including part of a human body.
  • Certain wipes of the invention include baby, children and adults wipes conventionally used for cleaning skin portions (for example face, uro-genital area, anal area) of adults or children.
  • other wipes for the invention includes articles for cleaning floors, kitchen surfaces, windows or office surfaces.
  • the wipes are generally impregnated with a composition.
  • the composition conventionally facilitates the removal of residues and/or delivers an active ingredient to the treated surface.
  • the composition is conventionally fluid or semi-fluid at ambient temperature.
  • the tissues are generally characterized by a width (17) and a length (18).
  • the width (17) of the tissue is conventionally measured edge to edge, transversally to the dispensing direction of the tissue.
  • the length (18) of the tissues is conventionally measured parallel to the dispensing direction of the tissue, edge to edge.
  • Tissues are typically rectangular or quadratic. For most rectangular tissues, the length 18 is greater than the width 17.
  • Tissues of the invention can also be circular, oval, triangular, pentagonal, hexagonal or of any shape suitable for the intended purpose.
  • Folded tissues Because tissues are generally larger than the pack from in which they are provided, the tissues are often folded. Some conventional folding configurations create 2 folds and 3 panels (so-called "C-folding and Z-folding"). As shown for example in Figures 3 , 4 , 6 and 7 a leading panel (6, 6a, 6b) articulates around a leading fold (7) to a central panel (8, 8a, 8b). The central panel (8, 8a, 8b) articulates around the trailing fold (9) to a trailing panel (10, 10a, 10b). More panels and more folds can be provided. In particular the central panel 8, 8a, 8b can comprise more than one panel and comprise one or more folds. Another conventional folding pattern is shown in figure 5 (so-called "V-folding”): the tissue has a leading panel (6a, 6b), a trailing panel (10a, 10b) and a leading fold (7a, 7b), but no central panel.
  • V-folding Another conventional folding pattern is shown in figure 5 (so-called
  • the tissues are folded in a way that divides their length (i.e. the folding lines are transversal to the dispensing direction, parallel to the width of the tissues).
  • the length (18) of the tissue is measured edge to edge, unfolded.
  • the tissues (3) comprise a leading edge (14) and a trailing edge (15) that are defined in regard to the dispensing direction of the tissue (3):
  • the leading edge (14) is first dispensed when the tissue (3) is pulled out of the external envelop (2).
  • the trailing edge (15) then terminates the dispensing of the tissue.
  • Tissues are conventionally provided in selling units comprising multiple tissues.
  • Tissue numbering such as first, second, "n th tissue” and “n+1 th tissue” is used in the present document to refer to the consecutive order of the tissues in the stack.
  • the first tissue of the stack is the interfolded tissue closest to the dispensing orifice of the pack and the numbering is consecutive.
  • the second tissue is positioned next to the first tissue in the stack and further away from the dispensing orifice.
  • n th tissue and “n+1 th tissue” are used in the present document to refer to successive tissues in the stack, the n th tissue being closer to the dispensing orifice than the n+1 th tissue and the n+1 th tissue following in the stack next to the n th tissue. It is understood that n can be an integer having any value between 1 and the number of tissues in the stack (13). Only interfolded tissues are considered in case the stack comprises a mix between interfolded and non interfolded tissues. It is considered that once a first tissue is dispensed, the (former) second tissue becomes the first tissue in the stack.
  • the tissues are conventionally folded and stacked one over the other to form a stack of tissues (13).
  • Stacks of tissues can be made of interfolded tissues and non-interfolded tissues.
  • the stack of tissues of the invention comprises interfolded tissues. In most interfolded stacks, at least a portion of a n+1 th tissue in the stack is located in between portions of two panels of a n th tissue in the stack (13). In most interfolded stacks, a portion of an n th tissue is located under a portion of an n+1 th tissue.
  • the dispensing of a n th tissue lifts a portion of the n+1 th tissue such as to prepare the n+1 th tissue for dispensing, preferably by inducing the protrusion of a portion of the n+1 th tissue through the dispensing orifice.
  • Interfolding / overlapping portion The manner the tissues are interfolded creates an overlap (19) between two consecutive tissues.
  • the tissues for the invention are interfolded such as to have a portion of the trailing panel (10a) and/or of the central panel (8a) of a n th tissue in the stack to be located under a portion of the n+1 th tissue in the stack. This creates an overlapping portion of the n th tissue.
  • the overlapping portion of the n th tissue is defined as the portion of the n th tissue (for example a portion of the trailing or central panel of the n th tissue) that is both (i) located under a portion of the n+1 th tissue and (ii) in contact with a portion of the n+1 th tissue.
  • under in regard to the folding configuration of the tissues (3) in the stack (13), is used in reference to the spatial orientation of the pack (1) and the stack (13) of tissues:
  • the term “under” make reference to the pack (1) of the invention being laid flat on an horizontal surface, the dispensing orifice (4) being located at upper side of the pack (1), and the tissues (3) being stacked below the dispensing orifice (4).
  • contact in regard to the portion of tissues (3), is equivalent to "direct contact”, i.e. portions of materials touching each other.
  • Figure 4 shows a portion of the central panel (8b) and of the leading panel (6b) of the second tissue in the stack being located in between a portion of the central panel (8a) and of the trailing panel (10a) of the first tissue in the stack.
  • a portion of the trailing panel (10a) is hence both (i) located under a portion of the central panel of the second tissue and (ii) in contact with a portion of the central panel of the second tissue.
  • Figure 5 shows a so-called V-folding of interfolded tissues. Overlapping portions of the leading panels are shown (19(n) and 19(n+1)). According to one embodiment of the invention, the length of the overlapping portion (19(n+1)) of the leading panel of the n+1 th tissue is greater than the length of the overlapping portion (19(n)) of the leading panel of the n th tissue.
  • Figure 6 another typical Z-folding of interfolded tissues (so-called "long Z-folding").
  • the length of the overlapping portion (19(n+1)) of the leading panel of the n+1 th tissue is greater than the length of the overlapping portion (19(n)) of the leading panel of the n th tissue.
  • Figure 7 shows a typical C-folding configuration of interfolded tissues.
  • the trailing panel (10a) of the n th tissue is located under and contacts the trailing panel of the n+1 th tissue.
  • a corner gap (20) may be created when the leading/trailing folds of two consecutive tissues do not touch each other.
  • the dimension of the corner gap (20) added to the dimension of the overlapping portion (19) of the n th tissue is equal to the dimension of the respective trailing (10) or leading (6) panels of the n+1 th tissue.
  • the length of the corner gap (20) can be equal to zero or have a positive value.
  • the length of the corner gap is less than 1mm, less 2mm, less 5mm, less than 10mm, or less than 25mm, for a stack of tissues of the invention - for example for wet-wipes.
  • the corner gap length (that is measured along the length of the tissues) can be constant value throughout the stack. Alternatively the corner gap can vary throughout the stack.
  • the length of the corner gap (20) is greater for the tissues closest to the dispensing orifice and smaller for the tissues further away from the dispensing orifice.
  • External envelope Stacks of tissues are conventionally enclosed in an external envelope.
  • the external envelop can serve as a protective envelope and/or a selling unit and/or a dispensing device.
  • the external envelope can be made of a flexible film (for example polyethylene or polypropylene or mixture thereof) to a refill pouch or a flexible pack convenient for traveling.
  • the external envelope can be made of a rigid material to form rigid envelopes, a rigid container or tub. Typical materials for rigid tubs comprise polymeric resins. Others can comprise metals, ceramics, wood or other rigid materials.
  • Figure 9 shows a typical rigid container for tissues (here being wet-wipes) according to the invention.
  • the container can contain a stack of tissues according to the invention.
  • FIG. 1 shows another typical pack of tissues (1) according to the invention:
  • the external envelop (2) encloses a stack of tissues (13).
  • the external envelop (2) is a thin flexible polyethylene film enclosing the tissues (3) that are wet wipes and forming the pack (1).
  • Dispensing orifice External envelopes generally comprise a dispensing orifice (4) through which the enclosed tissues can be dispensed.
  • Conventionally dispensing orifices (4) can have a variety of form and dimensions.
  • Figures 10 shows one conventional dispensing orifice (4) having an oval shape. Other shapes such as round, square, ovoid, triangular or rectangular shapes are possible.
  • the dispensing orifices (4) are characterized by a length (11) and a width (12).
  • the length (11) is the maximum dimension of the dispensing orifice (4) in a direction that is substantially parallel to the leading edge (14) of the tissues.
  • the width (12) of the dispensing orifice (4) is the maximum dimension of the dispensing orifice (4) in a direction orthogonal to the length (11) of the dispensing orifices (4).
  • the distance of the dispensing orifice to the tissue is the distance measured orthogonally from the plane of the dispensing orifice, from its center, to the surface of the tissues (3) in the stack (13). In a typical pack, the distance measurement is also orthogonal to the general plane of the folded tissues in the stack (13).
  • the terms “closer to” or “further away from the dispensing orifice” in regard to a tissue of the stack refers to the above distance measurement.
  • top of stack and “bottom of stack” are similarly used in regard to the position of the tissues in the stack relative to the dispensing orifice (The top of stack being closest to the dispensing orifice).
  • the pack (1) of multiple tissues (3) of the invention comprises an external envelop (2) and a stack (13) of tissues (1) that are interfolded such as to have a portion of the trailing (10) or central panel (8) of the n th tissue being (i) located under a portion of the n+1 th tissue in said stack, and (ii) in contact with a portion of the n+1 th tissue over an overlapping portion (19(n)) of the n th tissue.
  • a portion of the trailing panel (10) of the first tissue is located under a portion of the second tissue.
  • the surface area of the overlapping portion (19) of at least one tissue of the stack is different from the surface area of the overlapping portion of at least one other tissue of the stack.
  • the surface area of the overlapping portion (19(n)) of the n th tissue is different from the surface area of the n+1 th tissue - in this case it is of smaller surface area.
  • all overlapping portions (19) of n+1 th tissues are different from each other and in increasing order: surface area of overlapping portion (19(n)) is smaller than the surface area of the overlapping portion (19(n+1)).
  • Figure 8 exhibits: surface area of 19(n) ⁇ surface area of 19(n+1) ⁇ surface area of 19(n+2) ⁇ surface area of 19(n+3).
  • the tissues of Figure 8 have all the same width (see (17) of Figure 3 - the width of the tissue is not shown in Figure 8 but can be seen in the perspective view of Figure 3 ). Hence, the differences in the length of the overlapping portions (19) shown in Figure 8 induce the differences in the surface areas.
  • Width and length of the overlapping portion (19) are defined in regard to and measured parallely to the width (17) and length (18) of the tissues (3).
  • the surface area is measured or can be mathematically calculated from the width and length.
  • the pack (1) of tissues (3) has the surface area of the overlapping portion (19(n+1)) of at least one n+1 th tissue that is greater than the surface area of the overlapping portion (19(n)) of the n th tissue.
  • the surface area of the overlapping portion (19) of the tissues (3) is smallest for the tissues closest (in the pack) to the dispensing orifice and greatest for the tissues further away from the dispensing orifice.
  • the pack (1) of interfolded tissues (3) is characterized in that the surface area of the overlapping portions (19) of the tissues (3) in average increases with the distance of the tissues in the pack from dispensing orifice (4).
  • any first group of tissues (3) taken from the stack (13) has an average surface area of their overlapping portions (19) that is equal or smaller than the average surface area of the overlapping portions (19) of a second group of tissues (3) that is taken from a part of the stack (13) in a position that is further away from the dispensing orifice than the first group.
  • the average surface area of the overlapping portions (19) of a group of tissues is calculated by calculating the mathematical average of surface area of the overlapping portions (19) of each individual tissue of that group.
  • the pack (1) of tissues (3) comprises groups of consecutive tissues in the stack (13), wherein all tissues in each group have a substantially equal surface area of overlapping portions and wherein the surface area of the overlapping portions (19) in a group is different from the other groups.
  • the groups all have different surface area of overlapping portions (19).
  • the group having the greatest surface area of overlapping portions (19) is located in the stack (13) further way from the dispensing orifice compared to the other groups.
  • the pack (1) of tissues (3) the groups are positioned in the stack (13) in increasing order of surface area of overlapping portions (13): Groups with relatively greater surface area of overlapping portions (19) are respectively located further away from the dispensing orifice (4) compared to the other groups with relatively smaller surface area of overlapping portions (19).
  • the stack (13) comprises at least 2, at least 3, at least 4, at least 5 groups of tissues (1). In other embodiments the stack (13) comprises 2, 3, 4, 5, 10, 15 groups of tissues (1). Each group having a different surface area of overlapping portions (19), preferably positioned in the stack (13) in increasing order of surface area of overlapping portions (13).
  • the groups can comprise 1, 2, 3, 5, 10, 15, 20, 30, 50 or more than 50 tissues. All groups can comprise an identical number of tissues. Alternatively the groups can comprise different number of tissues.
  • the pack (1) of tissues (3) is characterized in that the surface area of the overlapping portion (19(n+1)) of any n+1 th tissue is greater than the respective surface area of the overlapping portions (19(n) of any n th tissue.
  • the overlapping portion (19) has a width and a length.
  • the width can substantially correspond to the width (17) of tissues (3) of the stack (1).
  • the width overlapping portion (19) is substantially constant, and/or, in a further embodiment, is substantially equal to the width (17) of the tissue.
  • the width overlapping portions (19) can vary in the stack. In a further embodiment it can vary increasingly with the distance to the dispensing orifice (4).
  • the difference in the surface area of the overlapping portions (19) can be created by - for example: different width, different length, different shape of the leading edge (14) and/or trailing edge (15) of the tissues (3), or by combination thereof.
  • the width (17) of the tissues (3) and of the width overlapping portion (19) are substantially equal and are constant for all tissues (3) in the stack (13). This is for example the most typical arrangement of a stack of tissue or wet wipes that have all same dimensions.
  • the variation of surface area of the overlapping portion (19) is provided by a variable length of overlapping portions (19).
  • the pack (1) of tissues (3), the surface area of the overlapping portions (19) varies in the stack (13) in a linear manner, i.e. following a linear mathematical equation.
  • the surface area of the overlapping portions (19), and/or the length of overlapping portions (19) linearly increase as a function of the distance of the tissue (3) to the dispensing orifice (4).
  • the surface area and/or the length of overlapping portions (19) vary in a parabolic, logarithmic, or exponential manner, i.e. following a respectively parabolic, logarithmic, or exponential mathematical function.
  • the pack (1) of the invention can also exhibit a variation in the surface area and/or the length of the trailing panels (10).
  • the same variations that have been described for the surface area of the overlapping portions (19) can also apply to the variation of the surface area and/or the length of the trailing panels (10).
  • the length and width of the panels are defined in regard and measured parallely to the length and width of the tissues.
  • the trailing panels (10) have a width substantially corresponding to the width of the tissues (3) of the stack (1) and a variable length that varies along said stack, preferably increasing with the distance to the dispensing orifice (4). In one embodiment, the length of the trailing panels (10) is smallest toward the dispensing orifice.
  • the length of the overlapping portions of the n th tissues (19) can be between 100mm and 2mm, between 50mm and 10mm, or between 30mm and 15mm. In one embodiment the length of the overlapping portions of the n th tissues (19) in a particular stack of the invention varies between 2mm at the top of the stack and 70mm at the bottom of the stack, between 5mm at the top of the stack and 60mm at the bottom of the stack, between 10mm at the top of the stack and 50mm at the bottom of the stack or between 15mm at the top of the stack and 32mm at the bottom of the stack.
  • the surface area of overlapping portions of the n th tissues (19) can be equal or more than 1cm 2 , equal or more than 10 cm 2 , equal or more than 200 cm 2 pending on the size of the tissue and of its adhesive properties. To prevent undesired adhesion of the tissues, it can be less than 500 cm 2 , less than 100 cm 2 , less than 50 cm 2 or less than 10 cm 2 .
  • the upper size of the surface area of overlapping portions (19) is related by the size of the tissue and the size of the panels, as well as to some desired dispensing properties.
  • the surface area of overlapping portions of the n th tissues (19) can vary in a particular stack between 2 cm 2 and 200 cm 2 , between 5 cm 2 and 100 cm 2 or between 15 cm 2 and 40 cm 2 .
  • the tissues (3) are wipes, preferably a wet wipes comprising a softening lotion.
  • the tissues of the invention can be absorbing tissues or non absorbing tissues.
  • the tissues (3) are paper tissues, preferably absorbing paper tissues, cosmetic tissues for facial use, cleaning tissues, surface-treating tissues, paper towels, toilet papers, bath tissues or paper handkerchiefs.
  • the tissues and/or the wipes have a length of between 5 cm and 100 cm and a width between 5 cm and 50 cm, most preferably a length of between 10 cm and 20 cm and a width of between 7 cm and 15 cm.
  • the thickness of the tissues can be of any value suitable for the intended usage and enabling dispensing out of the pack (1).
  • the tissues of the invention have a thickness of less than 20mm, less than 10mm, less than 5mm, less than 2mm or less than 1mm.
  • the length (11) of the dispensing orifice (4) is between 10% and 80% of the width of the tissues.
  • the corner gap (20) has a length that varies in the stack.
  • the corner gap (20) of a n th tissue has a greater length than a corner gap of a n+1 th, , n+2 th, n+3 th or n+x th tissue of the stack (13) (x being any integer wherein n+x ⁇ number of tissues in the stack).
  • the corner gaps (20) are in average of greater length for the tissues that are located closer to the dispensing orifice (4).
  • the corner gaps (20) can be of zero length for the tissues the further away from the dispensing orifice (4).
  • corner gaps (20) length, surface area of the overlapping portions (13), length of the overlapping portions (19), panel's lengths and all interrelated and variations in one of them may induce variations in one or more of the others.
  • the length (11) of the dispensing orifice is between 5mm and 120mm or between 20mm and 100mm.
  • the length (11) can alternatively be between 30mm and 75mm.
  • the length (11) of the dispensing orifice is 75mm and the width (17) of the tissues is 110mm.
  • the width (17) of the tissues is between 50mm and 150 mm, alternatively between 60mm and 130mm or between 80 mm and 120 mm. In an embodiment the width (17) of the tissues is 110 mm.
  • the length (11) of the dispensing orifice is about 20% to about 70% of the width of the tissues.
  • the length (11) of the dispensing orifice is 30% to 50% of the width (17) of the tissues.
  • the length (11) of the dispensing orifice is relatively too large in comparison to the width (17) of the tissues, then the low friction of the tissue along the edges of the dispensing orifice induces a complete unfolding of the tissue.
  • the dispensing orifice (4) is too narrow in comparison to the width (17) of the tissues, caused by too high friction.
  • a dispensing orifice within above range induces less occurrence of "fall-back" (leading panel of a second wipe falling back into the external envelope and not protruding from the dispensing orifice - this is inconvenient for dispensing the wipes).
  • the adhesion forces between the tissues also play a role in the above interactions.
  • the length of the overlap (19) between two consecutive tissues is between 15mm and 30mm for a tissue length (18) of 150mm, and the corner gap (20) between 3 and 5 mm.
  • the tissues are wipes.
  • the wipes have a corner gap (20) that is a constant throughout the stack.
  • a variable corner gap (20), trailing panel length (10) and thus the resulting overlap (19) can induce some dispensing advantages.
  • a corner gap (20) that is between about 8 and about 10mm for the first 10 wipes of a stack of 48 and that is then between about 3 and about 4mm for rest of the wipes in the stack has been shown to provide advantages for the dispensing (i.e. more uniform and reliable dispensing).
  • variable corner gap and trailing panel length can vary step by step throughout the height of the stack or can continuously (e.g. linearly) vary between two extreme values. This has also been shown when the variable corner gap and trailing panel length is combined with the present invention.
  • the separation force between the tissues is between 0.05 N and 5N or between 0.1N and 2N. In a particular embodiment, the separation force is 1.15N. The separation force is measured as described hereafter.
  • the pack of the invention can be made with any conventional folding equipment to fold, stack and pack the tissues, in so far the equipment allows adjusting separately the surface area of at least one overlapping portion (19). Indeed the process of the invention must allow at least one overlapping portion (19) to be different from the other overlapping portions.
  • the process of the invention uses groups of folding stations, (a group comprising one or more folding stations).
  • the groups of folding stations are adjusted or set-up separately so as to create overlapping portions (19) that are of larger surface area for the tissues that are positioned relatively further from the dispensing orifice (4) of the pack (1).
  • separate individual folding stations are used to fold each tissue of the stack, and the process comprises the steps of setting-up the separate individual folding stations such as to deliver the desired surface area of the overlapping portion (19) of the tissues.
  • the folding stations can act on the width or the length of the panels (6, 7, and 10) of the tissues (3).
  • the folding stations are replaced or complemented by one or more cutting sub-station(s) and the process includes the step of cutting in the width of the tissues (3) to provide variable overlapping portions (19).
  • variable head-space is one cause of the dispensing failures previously described.
  • the principle of "variable overlap” is an attempt to compensate the variation of head-space by a variation of the adhesion force between the tissues (the adhesion is linked to the overlap surface area).
  • the invention can be understood in the following manner: In order for the very first tissue of the stack to lift a portion of the interfolded second tissue of the stack, a first degree of friction/adhesion between the tissues is necessary. That friction / adhesion between the tissues is closely related to surface area of the overlapping portions (19), or to the length of the overlapping portions (19), to the length of the trailing panels (10) and/or to the length of the corner gap (20).
  • the increased head-space above the tissues requires a different balance of friction/adhesion between the tissues, as the tissues must be lifted to the dispensing orifice over an increased distance.
  • the "variable overlap" of the invention then responds to the need for a different friction/adhesion between the tissues.
  • the additional surface area of overlap provides an additional adhesion between the tissues that, in turn, allows the tissues to be more consistently lifted over the increased head-space to the dispensing orifice.
  • the tissues are wet wipes conventionally made of a 40% pulp / 60% Lyocell fibers spunlace substrate having a basis weigh of 60 g/m 2 , that is loaded with a softening lotion comprising Aqua, Propylene Glycol, Phenoxyethanol, PEG-40 Hydrogenated Castor Oil, Trilaureth-4 Phosphate , Methylparaben, Sodium Phosphate, Xanthan Gum, Disodium EDTA, Bis-PEG/PPG-16/16 PEG/PPG-16/16 Dimethicone , Ethylparaben, Propylparaben, Perfume, Caprylic/Capric Triglyceride, Hydroxycitronellal, Amyl Cinnamal.
  • a softening lotion comprising Aqua, Propylene Glycol, Phenoxyethanol, PEG-40 Hydrogenated Castor Oil, Trilaureth-4 Phosphate , Methylparaben, Sodium Phosphate, Xanthan Gu
  • the external envelop is a polypropylene / polyethylene laminate, thickness 73 ⁇ m, flexible film with a dispensing orifice having a rectangular shape of 35mm x 45mm.
  • the wipes were interfolded and had a general Z-folding configuration as illustrated in Figures 4 and 8 .
  • the wipes dimensions are: length 110mm x 150mm width, caliper 0.5 mm.
  • Table 1 shows the folding configuration of the wipes in the stack: wipes 1 (the closest to the dispensing orifice) to 8 had a length of the overlapping portion (19) of 15mm where wipes 41 to 48 (last wipe in the stack) has a length of the overlapping portion (19) of 32 mm.
  • Table 1 folding configuration Wipes position in stack (#1 is closest to dispensing orifice) Length of Leading panel [mm] Length of Trailing panel [mm] Length of central panel [mm] Corner gap [mm] Length of overlapping portion [mm] Surface area of overlapping portion (cm 2 ) 1 to 8 45 25 80 10 15 16.5 9 to 10 40 30 80 10 20 22 11 to 12 40 30 80 8 22 24.2 13 to 14 40 30 80 6 24 26.4 15 to 16 40 30 80 4 26 28.6 17 to 18 40 30 80 2 28 30.8 19 to 40 40 30 80 0 30 33 41 to 48 38 32 80 0 32 35.2
  • Measurement method for Separation force For measuring separation forces, twenty tissues are unfolded and placed flat on top of each other such as to overlap the leading panels of the tissues; the dimension of the overlapping zone is 12 cm. When a lotion is present on the tissues the sides of the tissues comprising the lotion are overlapped. The stack of tissues is compressed with 40 kg for 15 seconds over a surface of 25 cm x 25 cm or to an equivalent pressure. A compression stand is used to apply the pressure (PSP-Lockwood Green Pressure Device, manufacturer: PSP-Lockwood Greene GmbH, Germany - used according to manufacturer instructions). Samples are stored prior to separation force measurement for 72 hours +/- 4 hours at a constant temperature (25°C) and constant relative humidity, (50% relative humidity).
  • the reported separation force is the maximum (peak) force observed during the vertical separation of two consecutive wipes in the stack (One pair of wipes is removed from the stack and fixed in the tensile tester for measurement).
  • the separation force is measured with a tensile tester (ZWICK Roell Tensile Tester, type BTC-FR2, Zwick GmbH & Co. KG, Ulm, Germany).
  • the tester is used according to manufacturer instructions.
  • the operation parameters are as follows: start distance clamps: 270mm, clamps with flat rubber surface, width 60mm, pre-force: 0.05N, pull-speed: 300 mm/min, load-cell: 10-20N with resolution of 0.01N.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Sanitary Thin Papers (AREA)
  • Packages (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Claims (14)

  1. Emballage de papiers mousseline (1) comprenant plusieurs papiers mousseline arrangés dans une pile (13) et une enveloppe externe (2) comprenant un orifice de distribution (4) et enfermant ladite pile ;
    lesdits papiers mousseline étant pliés de façon à comprendre un panneau avant (6), un panneau arrière (10), un panneau central (8) facultatif, un pli avant (7) et un pli arrière (9) facultatif, dans lequel ledit pli avant (7) sépare ledit panneau avant (6) dudit panneau central (8) ou panneau arrière (10) et ledit pli arrière (9) facultatif sépare ledit panneau arrière (10) dudit panneau central (8) facultatif,
    ladite pile ayant un néme papier mousseline et un n+1éme papier mousseline, ledit n+1ème papier mousseline étant positionné à côté dudit nème papier mousseline dans ladite pile et davantage à l'écart dans la pile (13) dudit orifice de distribution (4), dans lequel n est un nombre entier ayant n'importe quelle valeur entre 1 et le nombre de papiers mousseline dans ladite pile,
    lesdits papiers mousseline sont pliés ensemble de façon à avoir une partie dudit panneau arrière (10) ou central (8) dudit nème papier mousseline qui est (i) située sous une partie dudit n+1ème papier mousseline dans ladite pile, et (ii) en contact avec ladite partie dudit n+1ème papier mousseline sur une partie en chevauchement dudit nème papier mousseline
    dans lequel
    la superficie de ladite partie en chevauchement (19) d'au moins un nème papier mousseline est différente de la superficie de ladite partie en chevauchement d'au moins un autre papier mousseline de ladite pile (13),
    et dans lequel ladite pile (13) comprend des groupes de papiers mousseline consécutifs dans ladite pile, dans lequel tous les papiers mousseline dans chaque groupe ont une superficie essentiellement égale desdites parties en chevauchement (19), caractérisé en ce que la superficie desdites parties en chevauchement dans un groupe est différente des autres groupes, et dans lequel ladite pile (13) comprend au moins 3 desdits groupes de papiers mousseline, lesdits groupes étant positionnés dans ladite pile (13) en ordre croissant de superficie desdites parties en chevauchement (19), le groupe avec la plus grande superficie étant situé dans ladite pile (13) davantage à l'écart dudit orifice de distribution (4).
  2. Emballage de papiers mousseline selon la revendication 1, caractérisé en ce que la superficie de ladite partie en chevauchement d'au moins un n+1ème papier mousseline est supérieure à la superficie de ladite partie en chevauchement dudit nème papier mousseline.
  3. Emballage de papiers mousseline selon la revendication 1 ou 2, caractérisé en ce que la superficie desdites parties en chevauchement desdits papiers mousseline en moyenne augmente avec la distance desdits papiers mousseline par rapport audit orifice de distribution (4).
  4. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, caractérisé en ce que la superficie de ladite partie en chevauchement de n'importe lequel dudit n+1ème papier mousseline est supérieure à la superficie respective desdites parties en chevauchement de n'importe lequel desdits némes papiers mousseline.
  5. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel ladite partie en chevauchement (19) a une largeur et une longueur, ladite largeur correspondant essentiellement à la largeur desdits papiers mousseline de ladite pile, caractérisé en ce que ladite largeur est essentiellement constante.
  6. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel la superficie desdites parties en chevauchement (19) varie dans ladite pile (13) d'une manière linéaire.
  7. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel la superficie desdites parties en chevauchement (19) varie le long de ladite pile d'une manière parabolique, logarithmique ou exponentielle.
  8. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel ledit panneau arrière (10) a une largeur et une longueur, ladite largeur correspondant essentiellement à la largeur desdits papiers mousseline de ladite pile (13) et ladite longueur desdits panneaux arrière (10) varie le long de ladite pile (13).
  9. Emballage de papiers mousseline selon la revendication 8, dans lequel ladite longueur desdits panneaux arrière (10) est la plus petite en direction de l'orifice de distribution (4).
  10. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel ledit papier mousseline est une lingette, de préférence une lingette humide.
  11. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel ledit papier mousseline est un papier absorbant, de préférence une serviette en papier ou un mouchoir en papier.
  12. Emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel lesdits papiers mousseline ont une largeur et ledit orifice de distribution (4) a une longueur, ladite longueur étant orientée parallèle à ladite largeur desdits papiers mousseline et ladite longueur dudit orifice de distribution est comprise entre environ 10 % et environ 80 % de ladite largeur desdits papiers mousseline.
  13. Procédé de fabrication de l'emballage de papiers mousseline selon l'une quelconque des revendications précédentes, dans lequel des stations de pliage individuelles indépendantes sont utilisées pour plier chaque papier mousseline de ladite pile, qui sont réglées individuellement pour libérer la superficie souhaitée de ladite partie en chevauchement de chacun desdits papiers mousseline.
  14. Procédé selon la revendication 13, dans lequel le réglage desdites stations de pliage agit sur la longueur desdits panneaux desdits papiers mousseline.
EP06117870A 2005-09-16 2006-07-26 Pile de feuilles entrepliées avec distribution améliorée Not-in-force EP1764332B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US11/521,004 US7571832B2 (en) 2005-09-16 2006-09-14 Pack of interfolded tissues with enhanced dispensing
PCT/IB2006/053326 WO2007031971A2 (fr) 2005-09-16 2006-09-15 Paquet de mouchoirs entreplies a distribution amelioree

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71803005P 2005-09-16 2005-09-16

Publications (2)

Publication Number Publication Date
EP1764332A1 EP1764332A1 (fr) 2007-03-21
EP1764332B1 true EP1764332B1 (fr) 2010-02-10

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ID=37496482

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EP06117870A Not-in-force EP1764332B1 (fr) 2005-09-16 2006-07-26 Pile de feuilles entrepliées avec distribution améliorée

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EP (1) EP1764332B1 (fr)
AT (1) ATE457287T1 (fr)
DE (1) DE602006012142D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI409210B (fr) * 2011-05-26 2013-09-21

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7571832B2 (en) * 2005-09-16 2009-08-11 The Procter & Gamble Company Pack of interfolded tissues with enhanced dispensing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002085289A (ja) * 2000-09-18 2002-03-26 Uni Charm Corp シート積層体
JP3730105B2 (ja) * 2000-10-04 2005-12-21 ユニ・チャーム株式会社 シート包装体
US6685050B2 (en) 2001-12-20 2004-02-03 Kimberly-Clark Worldwide, Inc. Folded sheet product, dispenser and related assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI409210B (fr) * 2011-05-26 2013-09-21

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EP1764332A1 (fr) 2007-03-21
DE602006012142D1 (de) 2010-03-25

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