MXPA01004739A - Heavy duty pre-cut adhesive coated tapes and dispenser - Google Patents

Abstract

A set of stacks of pre-cut adhesive-coated sheets (70) and a dispenser for dispensing a large number of such sheets are disclosed. The sheets include different adhesion levels to afford individual dispensing of the sheets.

Description

PRINTED ADHESIVE COATED TAPES, OF HEAVY USE AND SUPPLIER TECHNICAL FIELD The present invention relates to pre-cut adhesive coated sheets for attachment from one surface to another, and to a particularly suitable dispenser for supplying a large number of such sheets.

BACKGROUND OF THE INVENTION The technique is full of structures for sheets coated with adhesive adapted to connect or join a surface to another surface. The tape of the transparent tape # 810 MAGIC available from 3M, St. Paul, MN is widely used for various purposes and is conventionally supplied from a roll of such a tape or a roll type dispenser such as the dispensers described in U.S. Patent Number 4,928,864 and the Design Patent of the United States. United Number 116,599. Such a ribbon roll must be manually cut by a cutting means which is located in the spout. It is difficult for the user to manually cut precise and uniform lengths of the tape coated with adhesive from the roll, and it is difficult to measure the lengths accurately with precision. Such a ribbon / dispenser combination is not suitable for situations that require a fast and efficient supply of uniform and precise pre-cut lengths of the adhesive coated tape. South African patent application ZA 903889 discloses individual strips of adhesive coated tape mounted on a support tape. The support tape with the individual strips on it can be rolled up and included in a dispenser. Individual tape strips of predetermined length can be easily removed by pulling on the spout support tape and releasing a strip of tape from it. However, this solution generates a large waste of support tape and it can be difficult to remove a strip of tape with only one hand. GB 2 181 992 discloses a block of individual superimposed adhesive tape strips, wherein each strip of adhesive tape has an adhesive-free edge region to allow the individual tape strips to be easily lifted and removed from the block one after the other. of other. The adhesive-free edge piece needs to be removed after removing the tape strip from the block, which is annoying. In another embodiment, a non-adhesive element is provided to cover at least one edge region of the adhesive layer. This is also problematic and requires the use of two hands, which does not allow fast tape placement operations for example in the gift wrapping. Similarly, U.S. Patent No. 5,153,043 discloses an adhesive tape roll having several cuts extending parallel to the longitudinal axis of the roll and radially through the tape so as to divide the tape into a plurality of strips of tear tape laterally. A portion of the tape and therefore each individual tape strip has an adhesive-free area near an edge to serve as a leading edge for easy removal of the tape strip. Again, this does not provide a simple and fast delivery of the individual tape strips. In addition, the individual tape strips will vary in width through the roll with the strip of tape near the core of the roll with the smallest width. It is also known to provide a transparent tape from a pad or tape strips as described in U.S. Patent No. 4,650,706. Document '706 discloses a tape strip pad wherein the length of a tape tab formed at one end of each strip of tape extends from one end to an opposite end and is progressively greater from one side of the pad to the other . The document '706 discloses that the separation of the tape strip with the larger tape tab can be carried out by holding the tape tab and releasing the pad strip without separation of the next adjacent strip. Thus, a person who wants a sheet must manually separate an edge of an upper sheet from the rest of the sheets in the stack and detach that sheet by removing it, which is inconvenient, particularly when only one hand is available to remove the sheet. Such stacking is not suitable for situations where the user requires both hands for different operations to the supply of the tape, as is the case, for example, in the wrapping of gifts. U.S. Patent No. 4,895,746 discloses a stack of adhesive coated sheets, such as labels comprising a release means and a joining means that provides a means for easy release of the top sheet in the stack of sheets. The document t746 does not describe the placement of a release means or alternating opposite edges of the sheets in the stack. Therefore, similar to the tape strips described by the '706 document, a person desiring a sheet must manually separate one edge of the upper sheet from the rest of the sheets in the stack and detach the sheet by detachment, which results in not very convenient, particularly when a hand is available to remove the blade. The document '746 also does not disclose a container for adhesive coated sheets adapted to enclose and protect the sheets. U.S. Patent Nos. 5,401,547, 5,086,946 and 5,518,144 disclose a stack of pre-cut adhesive coated sheets having a joining means and release means alternating between opposite ends through the stack. These patents also describe a dispenser for an easy supply of individual sheets. The individual adhesive sheets can therefore be supplied easily and manually from the stack by means of one hand. However, the number of sheets in such a stack is generally limited due to the large number of sheets in a stack which can result in too great a separation between the supply window and the dispenser and the stacking once the end of the Stacking This can lead to difficulties in the supply of the last sheets of the stack. Accordingly, the stacks of adhesive coated sheets in these patents is less suitable for use by heavy users who need easy and convenient access to a large number of sheets coated with adhesive.

BRIEF DESCRIPTION OF THE INVENTION The present invention provides a set of stacks of sheets (70) coated with adhesive comprising on a main surface of a substrate (50) at least two stacks (51, 51A, 51B) adhered to a substrate (50), each stacking (51, 51A, 51B is a stack of sheets placed one above the other, each of the sheets (11, 12, 14, 16) has a first (19) and second (20) separate ends and a predetermined length between the first (19) and the second (20) ends, comprising a support (10) having first and second opposing main surfaces and having a layer of adhesive (2, 2A, 2B) sensitive to pressure on the main face of the sheet, the sheets are releasably adhered to each other by releasable adhesion of the layers of adhesive (2, 2A, 2B) sensitive to pressure, to the underlying sheet surfaces to form the stack with a first end (19) of each sheet in alignment with a second end (20) of an adjacent sheet in the stacking and the sheets have a first release means (8, 8A, 8B) to provide a first level of adhesion along a first end portion (15) of each of the sheets adjacent to the first end ( 19) between the adhesive layer (2, 2A, 2B) and the surface of the adjacent sheet in the stack to which the adhesive layer is releasably adhered which provides easy separation of the surfaces of adjacent sheets along the first end portion (15), and second release means (9, 9A, 9B) to provide a second level of adhesion along a second end portion (17) of each of the sheets adjacent to the second end (20) between the adhesive layer (2, 2A, 2B) and the surface of the adjacent sheet in the stacking, second level (9, 9A, 9B) of adhesion which provides a release force that is greater than the force of release along the first portion (15) of end and adh firmly attaches the sheet to an adjacent sheet in the stack during the separation of the sheets along the first end portion (15), while providing the release of the sheet from the stack along the second portion (17) of end. In still another embodiment, the present invention provides a dispenser for supplying ribbon flags or page markers or both, such as those sold by 3M Company. The present invention also provides a dispenser for supplying sheets from a stack of sheets, the stack of sheets is a stack of a set of stacks of sheets coated with adhesive of which each stack adheres to a substrate, the dispenser comprises defining walls. the shape of the spout, and a supply means comprising an opening (42, 82, 92, 126, 132, 142) in one of the walls through which the sheets of the stack can be supplied, and a means for enabling the transport (49, 89, 99, 129, 135, 145) of each stack of the set of stacks of sheets coated with adhesive under the opening of the supply means. The present invention also provides an alternative dispenser for supplying sheets from a stack of sheets, the stack of sheets is a stack from a set of stacks of sheets coated with adhesive, the dispenser comprises walls that define the shape of the dispenser, a cavity that can contain the set of stacks of sheets coated with adhesive, a wall (153) comprising an opening (156) that allows access to the cavity and a supply means (159) comprising a window (152) through which the sheets of the stack and a supply means (159) that can be transported can be provided so that each stack of the set of stacks of sheets coated with adhesive can be placed under the window (152) of the supply means. The dispenser and the set of stacks of sheets coated with adhesive of the present invention allows a fast and efficient supply of uniform pre-cut lengths of tape coated with adhesive. further, the dispenser and the set of stacks of adhesive coated sheets are particularly suitable for heavy duty users who need to have access to a large quantity of tape coated with pre-cut adhesive without wasting a lot of time in filling the dispenser. The dispensers of the present invention need to be refilled less frequently than existing dispensers, which can be easily refilled and also allow easy, fast and reliable access to a much larger amount of pre-cut adhesive coated tape compared to prior art systems. In addition, the individual pre-cut adhesive coated tapes are completely covered by adhesive and accordingly, there is no need to remove a portion that does not contain adhesive, as is the case in the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS The following drawings are provided to illustrate the various embodiments of the present invention however without intending to limit the invention to the same: Figure 1 is a schematic drawing of a set of stacks of sheets coated with adhesive, in accordance with the invention. Figure 2 is a schematic drawing of a stack of sheets coated with adhesive.

Figure 3A and 3B schematically illustrates two embodiments of an adhesive coated sheet, according to the present invention. Figure 3C is a diagrammatic representation of a stack of sheets coated with adhesive showing the portions containing the first release means and the second release means. Figures 4A to 4C illustrate three embodiments of a stack of a set of sheets coated with adhesive. Figure 5 illustrates a set of stacks of sheets coated with adhesive of the invention, in roll form. 6A to 6D are schematic representations of a partial, cross-sectional view through the dispensing window of the dispenser shown in FIGS. 9A-C. Figures 7A-C illustrate a first embodiment of a dispenser in relation to this invention. Figures 8A and 8B illustrate a second embodiment of a dispenser in relation to this invention. Figures 9A-C illustrate a third embodiment of a dispenser in accordance with this invention. Figures 10A and 10B illustrate a fourth embodiment of a dispenser in relation to this invention.

Figure 11 is a cross-sectional view of a fifth embodiment of a dispenser in relation to this invention. Figures 12A-G illustrate a sixth embodiment of a dispenser in relation to this invention. Figures 13A-C illustrate a seventh embodiment of a dispenser in relation to this invention.

DESCRIPTION OF THE PREFERRED MODALITIES The present invention provides a set of stacks of pre-cut sheets coated with adhesive. The stacks adhere to a rigid or flexible substrate typically to form a preferably continuous sequence of stacks. As used in this application, "flexible substrate" means a substrate that can be easily and repeatedly bent without causing damage to the substrate. Examples of flexible substrates include plastic films, lightweight cardboard and paper. As used in this application, "rigid substrate" means a substrate which can not be easily bent without causing damage to the substrate. Examples of rigid substrates include a rigid plastic body, wood or thick metal. When the substrate is a rigid substrate, it is preferred that the substrate be substantially non-planar. For example, the rigid substrate may be an arcuate or cylindrical substrate.

The stacks adhere to the substrate so that during the delivery of individual pre-cut sheets of the stack, the stack is not normally released from the substrate. In connection with the present invention, the substrate may also comprise a combination of substrates. For example, the individual stacks can be adhered to a back sheet that has approximately the same dimensions as the stacking and these stacks can then be linked together by means, for example, of adhesive strips joining the back sheets of two neighboring stacks each. In such a case, the substrate will comprise the back sheets of the individual stacks and the adhesive strips strung together to the stacks, to form a set of stacks of sheets coated with adhesive. The use of a flexible substrate in connection with this invention is preferred, as can be used with all of the various dispensers of the invention. In case the set of stacks of sheets coated with adhesive is to be used, with a dispenser comprising a transportable carrier, it will be preferred that the set of stacks of sheets coated with adhesive contain a means for firmly attaching the assembly to the transportable carrier. . According to a modality, a substrate can be provided with a joining means on one side of the substrate opposite the side containing the stacks of sheets coated with adhesive. For example, an adhesive that can be repositioned on the side of the substrate opposite the side having the stacks adhered thereto can be provided. Instead of using a removable adhesive, other bonding means may also be used such as a hook and loop joint, commercially available from 3M Company under the trademark SCOTH ^ or immobilization fasteners, also available from 3M Company . In addition, the surface of the transportable carrier can be provided with a cloth or non-woven surface and the substrate side of the stack of sheets of sheets coated with adhesive opposite the stack side adhered thereto, can be provided with cubicle fasteners. Fabric available from 3M Company under the trademark SCOTCH "11. According to an alternative embodiment, the front edge or the free rear edge of stacks of adhesive coated sheets can be provided in the set of stacks of sheets coated with adhesive so that the assembly can be firmly attached to the transportable carrier by inserting the leading or trailing edge into one or more grooves in the carrier, as an additional embodiment for firmly attaching the stack of sheets coated with adhesive to a transportable carrier, which can be used with carry carriers that are in the form of a wheel or a different core that can be In order to rotate, the set of stacks of sheets coated with adhesive can be provided as a band having a sufficiently large diameter so as to allow sliding of the set of stacks of sheets coated with adhesive on the transportable carrier to mount the assembly in the same while leaving a diameter small enough to avoid sliding relative to the transportable carrier during movement, i.e., the rotation of the transportable carrier. As a variation of this embodiment, a band with a diameter smaller than the diameter of the transportable carrier can be provided and the substrate of the set of stacks of sheets coated with adhesive can comprise an elastic material such as the diameter of the band which is It can stretch to fit the band on the transportable carrier. In the case of the set of stacks of sheets coated with adhesive to be used in a spout comprising a conveyor channel to allow the transport of the individual stacks to the supply window, it will generally be preferred that after the last stacking of the set it is Adhere a false pad to the substrate. The presence of such a fake pad substantially improves the supply of adhesive coated sheets from the last stack of the set of stacks of coated sheets coated with adhesive because if the fake pad, there may be an unwanted movement up and down the last Stacking As an alternative to the use of a fake pad, the dispenser can be provided with a means for temporarily blocking the substrate from the set of stacks of sheets coated with adhesive. Preferably a set of stacks of adhesive coated sheets having a flexible substrate in the form of a roll or as a web will be provided. Each stack in the set of stacks is a set of pre-cut sheets placed one on top of another, each sheet comprises a support and has a first and second main opposite sides and a first and second opposite ends with the first end of each sheet in alignment with the second end of an adjacent sheet in the stack and a layer of adhesive permanently adhered to the first main side of the sheet, the adhesive layer of each sheet adheres releasably along the second main side of the adjacent (lower) sheet in the stack. Each of the sheets comprises a first release means for providing a first level of adhesion along a first portion of ends of each of the sheets adjacent to the first end of the support between the adhesive layer and the second main side of the sheet. the adjacent (bottom) sheet in the stack. The first level of adhesion provides a sufficiently low release force (eg, preferably less than 1.97 grams / mm (50 grams per inch)) between the adhesive coating and the adjacent (lower) sheet to provide separation (which may include a "sliding movement") between the side surfaces of the adjacent sheets along the first end portion. The level of adhesion can be conveniently measured by the method ("release force") described in US 5,401,547 in column 21, lines 31 to 47. Second release means are present to provide a second level of adhesion to the length of a second end portion of each of the sheets adjacent the second end of the sheet between the adhesive layer and the second main side of the adjacent (bottom) sheet in the stack to which the adhesive layer is releasably adhered. The second level of adhesion provides a release force (preferably between 5 grams / mm and 17 grams / mm (4 and 15 ounces per inch)) that is greater than the low release force along the first end portion and firmly adheres the sheet to the adjacent (lower) sheet in the stack during the separation of the sheet relative to the adjacent sheet along the first end portion while providing a detachment away (eg manual) from the sheet to along the second end portion.

The first release means for providing the first level of adhesion and the second release means for providing the second level of adhesion may comprise various structures including, but not limited to, one or combinations of: (1) providing a uniform coating of the same pressure sensitive adhesive in each of the sheets together with a coating of a support size in the portion of the upper surface of each sheet only along the first end portion, or by providing support sizes of different low adhesion on the upper surface of each sheet along the first and second end portions, with the adhesion support sizing low at the first end portion having the greatest release factor (ie, the value of minor release); (2) making the pressure sensitive adhesive coating along each of the discontinuous sheets along the first end portion and continuously along the second end portion, or discontinuously along both portions with larger discontinuities along the first end portion compared to what is generated along the second; or (3) using different pressure sensitive adhesives along the two end portions. For example, a stack of sheets may comprise a layer of coated adhesive on the entire first main side surface of the support of each of the sheets, the second release means may comprise a layer of a low adhesion support size of medium release (LAB coated on at least a portion of the second main side surface adjacent the second end of the sheet, and the first release means may comprise a layer of a special release low adhesion support (LAB) coated coating on a portion of the second main side surface adjacent the first end of the sheet In this example, the sheets in the stack can have a length along a longitudinal axis and a width along a direction perpendicular to the longitudinal axis of the stacking The special release layer of the low adhesion support slab (LAB) is continuous, extending from the first The end of the support along the length of the sheet and comprises between ten (10) and eighty (80) percent of the area of one side of the support of each sheet in the stack. Preferably, the special release low adhesion support (LAB) sizing layer generally comprises about 37 and one half percent of the area of one side of the support of each sheet in the stack. Preferably, each stack of the set of stacks of sheets coated with adhesive has a tongue releasably adhered to the first sheet of the stack. Such tongue has first and second opposite ends and comprises a support. On one main side of the support along the first end an adhesive layer is provided and at least a portion of a main side of the support along the second end of the tongue will be free of adhesive. Preferably, the tongue has a length that is less than the length of the sheets coated with adhesive in the stack. Preferably, the tongue will have a length that is about half the length of the sheets coated with adhesive. The tab preferably adheres to the stack so that the first end of the tab containing the adhesive layer is aligned with one end of the stack. The tab is releasably adhered to each stack and provides an easy way to hold the first sheet coated with adhesive from a stack. Generally, as used herein, "sheet material" means a generally flat flexible structure, preferably acetate, polished acetate film, unpolished acetate film, thermosetting film, thermoplastic film, polyester, polypropylene, polyethylene, vinyl, paper , metal foil, non-woven material or combinations of the aforementioned materials. Preferably, the material of the sheet is transparent to allow the user to see the underlying substrate but the material of the sheet may also be opaque.

A support size with a low adhesion refers to a material which is easily released from a layer of pressure sensitive adhesive and includes, but is not limited to silicones, fluorocarbons, acrylates, urethanes, chromium complexes, siloxane hydrocarbons grafted or block and combinations of these materials. Examples of various low adhesion support sizes are found in U.S. Patent Nos. 4,421,904; 4,313,988; and 4,279,717, the complete specifications of which are expressly incorporated herein by reference. Other low adhesion support sizes that can be used in accordance with the present invention are described in U.S. Patent Nos. 2,607,711; 2,876,894 and 2,532,011, all of which are also incorporated herein by reference. Generally, as used herein, "special release low adhesion support sizing" means an adhesive / support sizing interaction with a maximum release strength of 100 grams per 2.54 cm (inch) or less and a "sizing" medium release low adhesion support "means an adhesive / support sizing interaction with a release force of at least 150 grams per 2.54 cm (inch) or greater. The pressure sensitive adhesive can be an acrylic, silicone, rubber resin or any other suitable composition. For example, the adhesive may comprise acrylic adhesive IOA (95%) / AA (4.5%) isooctyl acrylate / acrylic acid. The adhesives for use with the present invention are described in U.S. Patent Nos. 4,699,842; 3,578,622; 3,331,729; 2,926,105 and 4,835,217, whose full specifications are expressly incorporated herein by reference. Re-locatable adhesives such as acrylic-based microspheres (IOA-ammonium acrylate) are also contemplated as an adhesive for use in accordance with the present invention. For example, repositionable adhesives may be prepared, in accordance with U.S. Patent No. 3,691,140, the entire specification of which is also incorporated herein by reference. The present invention also provides various dispenser embodiments for use with the set of stacks of adhesive coated sheets of the invention. A dispenser of the present invention is typically capable of holding a set of stacks of adhesive coated sheets containing at least 4 stacks, preferably at least 8 stacks and more preferably at least 16 stacks. A dispenser of the present invention can include a dispensing window through which individual sheets of a stack can be supplied. In addition, the supply window and the set of stacks of sheets coated with adhesive can be movable relative to one another so that each of the individual stacks can be placed under the supply window once a stack has been consumed of the leaves. Preferably, the movement is increasing and means are provided so that an individual stack is maintained in a temporarily fixed position relative to the supply window. According to a set of modalities, the dispenser comprises one or more walls that define its shape and a supply means comprising an opening in one of the walls. The opening of the supply means also referred to as the supply window in the following, typically has a width slightly greater than the width of the stack of sheets coated with adhesive and a length which is a little less than the length of the stack of sheets coated with adhesive. adhesive. For example, the width of the supply window may be between 100 and 120% of the width of a stack, and the length of the supply window may be between 20% and 90% of the length of a stack. Although it is generally important that the length of the supply window be less than the length of the stack of sheets coated with adhesive, the width of the supply window is less critical and the width can be large enough to accommodate two or more stacks in the supply window so that the supply of several stacks can be carried out at the same time. According to one embodiment of the present invention, the opening in the wall through which the individual sheets are also to be delivered can have a width and length substantially less than that desired for the supply of sheets coated with adhesive. In such an embodiment, the size of the opening in the wall can be adjusted by superimposing on the opening a second opening having smaller dimensions. Therefore, in such an embodiment, the supply means will comprise an opening in one of its walls and an opening superimposed thereon which has smaller dimensions than the opening in the wall of the spout. The use of a supply window superimposed on a larger opening in the wall may be of particular use to accommodate the use of different sets of stacks of adhesive coated sheets having stacks of a different width or length. As a further alternative, a transfer supply window may be provided in the upper part of the opening in the spout wall, such a transfer window will typically include a small slot (slightly larger than the thickness of a sheet) through wherein a sheet can be extended and during the delivery operation, the transfer supply window will transfer one edge to the other over the opening along the length of the opening. This alternative has the advantage that the sheets are always in a vertical position and easy to hold. Although the supply window is preferably rectangular, other shapes may be used such as a circular opening, an oval opening or an opening with one or more straight edges and one or more rounded edges. The dispensing window in these modalities is fixed, that is, it does not move in relation to the set of stacks of sheets covered with adhesive and consequently, the set of stacks of sheets coated with adhesive will have to be moved in relation to the supply window to place a stack in the supply window. Therefore, the dispenser will include a means to allow transportation of the individual stacks of the assembly to the supply window. Such means of transport can include a conveyor channel which can optionally be connected to a cavity in which a set of stacks of sheets coated with adhesive is stored, or a means for transport can include a transportable carrier such as a rotating wheel, a rotating core or a band. Preferably, the conveying direction of the set of stacks of sheets coated with adhesive will be parallel to the longitudinal direction of the set of stacks of sheets coated with adhesive.

In a spout having a conveyor channel, the set of stacks of sheets coated with adhesive will preferably have a flexible substrate. When moving, for example by manually pulling a leading edge of a set of adhesive coated stacks, one stacking after another can be transported to the dispensing window of the dispenser. In a dispenser having a transportable carrier, the set of stacks of sheets coated with adhesive will be firmly attached to the carrier and by movement thereof, each of the individual stacks of the assembly can be transported to the supply window to supply individual sheets of a stacking As an alternative for moving the set of stacks of adhesive coated sheets in relation to the supply window, the dispenser can contain a set of stacks of sheets coated with adhesive in a cavity in a fixed position and then a movable supply window is provided . The set of stacks of sheets coated with adhesive of the present invention and the dispenser for use therewith will now be described in more detail with reference to the drawings. Referring now to Figures 1, 2, 3A to 3C, 4A to 4C and 5, there is shown an embodiment of a set of stacks of sheets 70 coated with adhesive (Figure 1, 5) comprising stacks 51 adhered to a substrate 50. Figure 2 schematically represents a stack 51 of sheets coated with adhesive containing a plurality of sheets 12, 14 coated with adhesive releasably adhered to each other. According to a first embodiment of a stack 51 of sheets 11 (Figure 3A) according to the present invention, each sheet 11 comprises a support 10 having a coating of pressure sensitive adhesive 2 on a first main side surface 3 by which sheet 11 can adhere to a bottom sheet in the stack 51, a second main side surface 5 and a first 19 and second 20 edges opposite the first end 19 of each sheet in alignment with the second end 20 of a adjacent sheet to form the stack 51. The release means 8 provides a first level of adhesion along a first end portion 15 of each of the sheets 11 adjacent the first end 19 of the support 10 between the layer of adhesive 2 and the second side surface 5 of the adjacent (lower) sheet in the stack 51. The first level of adhesion provides a sufficiently low release force (eg, preferably e less than 1.97 grams / mm (50 grams per inch)) between the adhesive coating 2 and the adjacent (lower) sheet to provide a sliding movement (eg, see Figures 6A-6D) between the side surfaces 3, 5 of the adjacent sheets (e.g. sheet 14 below the topmost sheet and sheet 16 below sheet 14 (Figure 6B) along the first end portion 15. The attachment means 9 provides a second level of adhesion along a second end portion 17 of each of the sheets adjacent the second end 20 of the support 10 between the adhesive layer 2 and the second side surface 5 of the sheet adjacent (lower) in the stack to which the adhesive layer 2 is releasably adhered. The second level of adhesion provides a release force (preferably between 5 grams / mm and 17 grams / mm (4-15 ounces per inch)) which is greater than the low release force along the first end portion 15 and firmly adheres to the sheet (for example 12) to the adjacent sheet (for example 14) in the stack during the separation of the sheet (for example 14) in relation to the adjacent sheet for example 16, (see Figure 6B) along the first end portion 15 while providing release (for example manual) ability of the sheet (for example 12) along the second end portion 17 (see Figure 6C-6D). Preferably, the pressure-sensitive adhesive layer is uniform, of the same adhesive composition and has a glass adhesion greater than 17 grams / millimeter (10 ounces per inch). For example, the adhesive may comprise an acrylic adhesive IOA (95%) / AA (4.5%) of isooctyl acrylate / acrylic acid. Adhesives for use with the present invention are described in U.S. Patent Nos. 4,699,842; 3,578,622; 3,331,729; 2,926,105 and 4,835,217, the full specifications of which are expressly incorporated by reference herein. Figure 3B is similar to Figure 3A except that a size 7 has been added to the second main side surface 5 of the support 10 of the sheet 11. Additionally, a size (not shown) can be added to the first major side surface 3 of the support 10 of the line 11. The sizes 11 are optional and where the first release means 8 or the adhesive 2 do not adhere naturally to the sheet 11, the sizes known in the art can be used without affecting the release performance of the first release means 8 or of the adhesive 2. Figure 3C illustrates a generally rectangular sheet 11 having a longitudinal axis A defining a length L (preferably 5.08 centimeters (2.0 inches)) and a width Z. The area of the first end portion 15 of the sheet 11 shown in Figure 13C is the length Y (preferably 1.90 centimeters (0.75 inches)) of the first release means multiplied by the length Z (the width of the h oja, preferably 1.90 centimeters (0.75 inches)). The area of the second end portion 17 of the sheet 11 shown in Figure 3C is the length X of the second release means 9 multiplied by the length Z (the width of the sheet). Generally, the first end portion 15 extends from the first edge 19 along the length of the sheet 11 and comprises between ten (10) and eighty (80) percent of the area of one side of each sheet 11 in the stacking 51. Preferably, the first end portion 15 generally comprises about 37 and 50 percent of the area of one side (for example 5) of the support 10 of each sheet 11 in the stack. Correspondingly, the second end portion 17 extends from the second edge 20 along the length of the sheet 11 and comprises between 20 (20) and ninety (90) percent of the area of one side of the support 10 of each sheet in the stack 51. Preferably, the second end portion 17 generally comprises about 62 and 50 percent of the area of one side of each sheet in the stack. It should be noted that the sheet 11 shown in Figure 3C is rectangular. However, various forms within the scope of the invention are included which include but are not limited to square, circular, triangular and polygonal shapes, and combinations thereof. In order to individually supply a single sheet 11 from the sheet stack 51, the first release means 8 must provide a release force less than about 1.97 grams / mm (50 grams per inch) along the first portion 15. of end, and the second release means must provide a release force greater than about 5 grams / mm (4 ounces per inch) and less than about 17 grams / mm (15 ounces per inch) along the second portion 17 of end. If the releasing force of the first release means 8 is too high (eg, greater than about 50 grams per 2.54 cm (1 inch)), only one sheet will come off the top of the stack 51 since the high release force will prevent the sliding motion of the two uppermost sheets 12 and 14 in the stack 51 relative to the subsequent adjacent sheet 16, which prevents the separation of sheets 14 and 16 (for example, see Figures 6A-6D). When releasing the second release means 9 is too high (eg, greater than 167 g / cm (15 ounces per inch), it becomes difficult to detach the uppermost sheet 12 of the sheet 14 below it. second release means is too low (for example less than 156 g / cm (14 ounces per inch), however, there is no separation of the two sheets 12 and 14 more upper in the stack 51 in relation to the adjacent sheet 16 sub sequentially since the uppermost sheet 12 will detach sheet 14 below the uppermost sheet before sliding can occur. Preferably, the first release means 8 has a release force of approximately 0.097 grams / mm (2 grams per inch) along the first end portion 15, and the second release means 9 can provide a release force of approximately 5 grams / mm (4 ounces per inch) along the second end portion 17. Referring now to Figure 4 of the drawings, there is shown an example of a first embodiment of a stack of sheets according to the present invention, generally designated with the reference number 51. The stacking 51 of sheets 11 may comprise a layer of adhesive 2 coated over the entirety of the first side surface 3 on the backing 10 of each of the sheets 11, a first layer of a medium-release low adhesion support sizing 1 (LAB) coated on a second main side surface 5 of the support 10 along at least the second end portion 17 adjacent the second edge 20 of the sheet 11, and a second layer of a low support size 1 ' Special release adhesive (LAB) coated on the second main side surface 5 along the first end portion 15 adjacent to the first edge 19 of the sheet 11. The support 10 may comprise, for example, an acetate support such as discloses in U.S. Patent No. 2,927,868, the entire specification of which is incorporated herein by reference. The sheets 11 are stacked with the special release low adhesion support slab 1 '(LAB) on each successive sheet positioned along alternating opposite ends of adjacent sheets 11 in the stack 51 with the first end 19 of a sheet aligned with the second end 20 of the adjacent sheets and with the adhesive coating 2 of the sheet releasably adhering to a sheet of the second main side surface 5 of a successive (lower) sheet to maintain the sheets in the stack 51. It should be noted that although FIG. 4A illustrates the special release low adhesion support sizing 1 'coated on the top of the medium release low adhesion support sizing 1, the stack 51 can be constructed with a low support sizing 1'. Special release adhesive coated directly on the second main side surface 5 of the support 10 of the sheet 11. Referring now to Figure 4B of the drawing or, a second alternative embodiment of a stack of sheets according to the present invention, generally designated by the reference number 51A which has many parts that are essentially the same parts of the stack 51 of the sheets 11 and which is has identified by the same reference number to which the suffix "A" has been added. In Figure 4B, the first release means 8A to provide the first level of adhesion, and the second release means 9A to provide the The second level of adhesion comprises making the pressure-sensitive adhesive coating 2A on the support 10A of each of the sheets HA in a discontinuous manner 18 along the first end portion 15A and the continuous part 18 'along the the second end portion 17A. Such a stack 51A may include only a single layer IA of a low adhesion support sizing along the second major surface 5A of the support 10A of the sheet HA. Alternatively, the first release means 8A to provide the first level of adhesion, and the second release means 9A to provide the second level of adhesion may comprise coating processing of the pressure sensitive adhesive 2A on the support 10A of each of the sheets HA discontinuous in both portions (not shown) with larger discontinuities in the first end portion 15A compared to the second end portion 17A. Referring now to Figure 4C of the drawing, a third alternative embodiment of a stack of sheets according to the present invention is shown, generally designated with the reference number 51 which has many parts that are essentially the same parts as those of the stack 51 of the sheets 11 and which they have been identified with the same reference number to which the suffix "B" has been added. In Figure 4C, the first release means 8B to provide the first level of adhesion and the second release means 9B to provide the second level of adhesion comprises changing the composition of the pressure sensitive adhesive 2B over the course of the first 15B and second 17B end portions. As with the stack 51A, the stack 51B can include only a single layer IB of a low adhesion support sizing along the second main surface 5B of the support 10B of the sheet 11B. As an example of the stacking 51B, the adhesive 13 used along the first end portion 15B may be relatively weak or a weakly active adhesive, such as that described in United States Patent Number 3,691,140. An adhesive that is particularly suitable for use along the first end portion 15B may comprise an acrylic adhesive or acrylic microspheres. The adhesive 13B used in the second adhesion zone 17B may be a relatively active or strong adhesive, such as an acrylic adhesive, rubber resins or KRATON "1 *. The adhesives for use with the present invention may be prepared in accordance with U.S. Patent Nos. 4,699,842 and 4,835,217 The pre-cut sheets of the present invention are particularly useful for tasks which generally require the use of both hands for operations other than the supply of the ribbon, such as wrapping gifts, packing, covering of books, closing of boxes, medical tapes, marking of tapes and highlighting In addition, the supply of the sheets covered with individual adhesive does not require a cutting operation and therefore the supply is easy and fast. the stacking assembly of coated sheets with adhesive of this invention, the user can have a large quantity of pre-cut sheets dis The substrate 50 to which the stacks 51, 51A or 51B can adhere can be a flexible substrate as well as a rigid substrate. A flexible substrate is preferred for use with the dispensers of the invention having a conveyor channel or the dispensers of the invention that contain a transportable carrier for placing a fresh stack under the dispensing window of the dispenser. If a dispenser contains a transportable carrier to which a stack of sheets coated with adhesive is to be joined, the substrate 50 will preferably be coated with an adhesive that can be repositioned on the side opposite the side containing the stacks of sheets coated with adhesive. By the term "removable adhesive", in connection with this invention is meant an adhesive which allows the substrate 50 to be firmly attached to a transportable carrier during the supply operations but which at the same time allows the removal of the transportable carrier after the set of stacks of sheets coated with adhesive have been consumed without leaving substantial amounts of adhesive residue. An example of a suitable adhesive is the pressure sensitive adhesive used in the POST-IT1® notes. Alternatively, the substrate 50 can be firmly joined by providing a leading or trailing edge on the substrate 50 that is free of the stacks 51 of sheets coated with adhesive. In Figure 5 a set of stacks of sheets coated with adhesive including a leading edge 53 is shown. This front or rear edge can then be inserted into one or more grooves adapted to receive the leading or trailing edge and which are provided in the transportable carrier. The use of a removable adhesive or the use of a leading or trailing edge may also be preferred to maintain a set of stacks of sheets coated with adhesive in a fixed position with dispensers of this invention having a supply window Removable When the substrate 50 is a flexible substrate, it is generally preferred that it provide a set of stacks of sheets coated with adhesive in a rolled form, as shown in Figure 5, or in a band form. Also shown in Figure 5 is the presence of a false pad 52 which adheres to the substrate 50 after the last stack of the set of stacks of sheets covered with adhesive. Generally, this false pad 52 is a pad that has approximately the same dimensions as the individual stacks of the assembly but does not contain sheets coated with adhesive. An example of a false pad 52 includes a hollow plastic rod. The use of a fake pad can be an advantage in jets that use a conveyor channel. In these dispensers, the false pad will prevent substantial movement of the assembly when the sheets are supplied from the last stack in the set of stacks of sheets coated with adhesive. Examples of flexible substrates to which the stacks can adhere include polyethylene film, cellulose acetate, polypropylene film, polyester films, non-woven and woven fabrics, paper coated with polyethylene or polypropylene, flat paper and lightweight cardboard. The thickness of the flexible substrate is typically between 0.05 mm and 1 mm, preferably between 0.15 mm and 0.5 mm. The individual stacks 51, 51A or 51B preferably adhere to the flexible substrate with the length of each stack aligned with the width of the flexible substrate. The stacks 51, 51A or 51B preferably adhere to the flexible substrate by means of the adhesive layer of the last sheet in a stack. However, it is also possible to adhere the last sheet in a stack to a support and then to adhere this support to a flexible substrate by means of an adhesive, for example of a pressure sensitive adhesive. When the substrate 50 is provided as a rigid substrate, it is preferred that the set of sheets coated with adhesive be substantially non-planar. When the rigid substrate is substantially flat, the neighboring stacks in the assembly can adhere to each other, which causes difficulties in the supply of individual sheets from a stack. Preferably, the rigid substrate is arcuate or is a core such as for example a cylindrical core with individual stacks adhered to the outer surface of a substrate or arcuate core. A set of stacks of sheets coated with adhesive can be manufactured in connection with the present invention by producing stacks of sheets coated with individual adhesives as illustrated in the examples of US 5,401,547. In this case, the sheet coated with individual adhesive will be stacked in z on a support sheet having the same dimensions as the individual sheets coated with adhesive. Consequently, such stacks will contain as a lower sheet a support sheet. In order to obtain a stacking assembly of adhesive coated sheets of this invention, these individual stacks can be attached to a substrate by means of an adhesive such as a pressure sensitive adhesive or a hot melt adhesive. Alternatively, another second release means may be used to adhere the individual stacks to the substrate 50. Such other second release means include what is referred to as the commercially available hook and loop joint of 3M Company under the trademark SCOTCH ^ or fasteners and mobilizers also available from 3M Company. According to a particular embodiment of the present invention, the individual stacks can be adhered to an adhesive tape by placing the individual stacks close together as a continuous chain on the adhesive coated side of the adhesive tape. According to an alternative embodiment to produce the set of stacks of the sheets coated with adhesive of this invention, a single pad of sheets coated with adhesive having a length L and a width W can generally be produced according to the procedure illustrated in the examples of US 5,401,547. As described above, the lowest sheet in this pad of adhesive coated sheets will be a backing sheet and the individual adhesive coated sheets are stacked in z so that the first release means 8, the second half 9 of release alternate between edges that define the width of the pad. To obtain the set of stacks of adhesive-coated sheets of this invention, the pad of the sheets coated with adhesive are cut at regular distances R along the length L. However, the cutting of the pad is carried out from so that each of the sheets coated with adhesive is cut through, but not completely cut through the backing sheet, in what is termed a contact cut. By the term "not completely cut through" is meant that at least 10% and preferably at least 20% of the thickness of the support sheet is not cut. Consequently, we obtain n stacks of a width R (the product of n and R that corresponds to the length L of a single pad except for the potential remainder) and a width W (corresponding to the width of the single pad that closes the which is joined and held together on the support sheet, which serves as a substrate 50. The contact cut of the pad can be carried out in various ways, for example, cutting can be carried out on contact with a knife. which completely cuts through a part of the support sheet along the width W while leaving the support sheet partially uncut at other parts along the width W. For example, a cutting blade may be used completely through the support sheet on both edges of the pad while leaving the support sheet partially uncut in the middle part along the width W of the pad, or vice versa the support sheet can be left even It is not cut at the edges while cutting completely through the middle part along the width W. The advantage of partially or completely cutting through the support sheet and partially not doing so is that it can be increase the flexibility of the substrate 50. As an alternative to the embodiment described in the previous paragraph, the single pad of sheets coated with Z-stacked adhesive can be wound around a core and the single pad can then be cut to contact regular intervals along the circumference of the core so as to provide a set of stacks of sheets coated with adhesive having a rigid core such as the substrate. A first embodiment of a dispenser 40 of the present invention is shown in Figures 7A, 7B and 7C. The spout 40 comprises walls that define its shape. The spout 40 comprises an arcuate upper side 41 opposite the lower wall 47. The upper side 41 comprises an opening 42. The spout 40 further comprises a front side 45 and a rear side 46 opposite and a front side 45 having a rectangular inlet opening 44 and a rectangular outlet opening 43. The shape of the spout 40 is further defined by two opposite side walls 48. As shown in the cross-sectional view in Figure 7B, the spout contains a conveyor channel 49 which connects the inlet opening 44 to the outlet opening 43 as it passes along the opening 42. The conveyor channel 49 can maintain a set of stacks of sheets 70 coated with adhesive. The set of stacks of sheets 70 coated with adhesive preferably contains a front part where the substrate 50 does not contain stacks 51. The length of this front part can be at least equal to the length of the opening 42 between the conveyor channel and a 43 exit opening. Although the set of stacks of sheets 70 coated with adhesive can be limited by means of an inlet opening 44 within the conveyor channel 49It is preferred that at least one of the side walls 48 be removable so that the conveyor channel 49 can be accessed from one of the sides of the spout for easy assembly of a set of stacks of sheets 70 coated with adhesive on the side. same. The conveyor channel 49 should have at least one width and height so that the set of stacks of sheets 70 coated with adhesive is easily placed within the conveyor channel. Typically, the conveyor channel 49 will have a width and height that are slightly greater than the width and thickness respectively of the set of stacks of sheets 70 coated with adhesive. However, as shown in FIG. 7B, the height of the portion of the conveyor channel 49 between the opening 42 and the exit opening 43 is preferably reduced to slightly greater than the thickness of the substrate 50 of the stack assembly of the sheets 70. coated with adhesive. The spout 40 preferably also includes a ballast 100 to provide the spout with sufficient weight to remain stable during the supply operation. Alternatively, in order to keep the spout stable during the supply operation, the bottom wall of the spout can be provided with a suction cup or a joining means as described in EP 355700. Either of these means for stabilizing the spout and in In particular, the use of a ballast are preferable and are included in the additional modes of the pumps described in the following. However, for reasons of clarity and convenience, such means are omitted in the drawings and description corresponding to these additional embodiments. A second mode of a dispenser is shown in Figures 8A and 8B. The spout 80 of Figures 8A and 8B comprises walls defining the shape of the spout, the walls include an arcuate top wall 81 opposite the bottom wall 87. The upper wall 81 contains an opening 82 through which sheets coated with adhesive can be supplied. The upper wall 81 is further removable or articulated so that a set of stacks of adhesive coated sheets roll up like a roller (see Figure 5) and can be easily inserted into the cylindrical cavity 88 of the spout. This further allows easy access to the conveyor channel 89 so that the first stacking of the assembly can be easily placed in front of the opening 82. As shown in Fig. 8A, when closed, the dispenser contains an aperture in the front wall 85. through which the substrate 50 of the set of stacks of sheets coated with adhesive extends. Once the stack of adhesive coated sheets is consumed, the next stack can be moved into the assembly, below the opening 82 simply by pulling the substrate 50. A further embodiment of a dispenser in connection with this invention is shown in FIG. Figures 9A, 9B and 9C. The spout 90 contains walls defining its shape and including a bottom wall 101 and an opposite top wall 91 that contains an opening 92 through which the sheets coated with adhesive can be supplied. The spout 90 further includes a rear wall 96 and an opposite front wall 95 that contains a rectangular opening 93 connected to a conveyor channel 99. As shown in Figure 9A, the conveyor channel 99 extends through the side wall 98. The conveyor channel 99 is further connected to a cylindrical cavity 94 in which a roll of a wound assembly of stacks of sheets 70 coated with adhesive can be mounted. The cavity 94 also extends through the side wall 98 so that both the cavity 94 and the conveyor channel 99 can be easily accessed to place a set of stacks of sheets coated with adhesive in the spout. The set of stacks of sheets coated with adhesive is placed in the spout with a front part of the substrate 50 extending through the opening. 93 on the front wall 95 and the first stack of sheets coated with adhesive under the opening 92. The cavity 94 can be closed with a removable or articulated cover 94b. As a variant of the spout 90, the entire side wall 98 can be provided as removable or articulated. In the latter case, the conveyor channel 99 and the cavity 94 should not extend through the side wall 98. Furthermore, as shown in Figure 9C, the set of stacks of adhesive-coated sheets are rolled up as a roll and may be contained in a cylindrical support 55 containing an opening 56 through which the substrate 50 of the assembly extends. of stacks of sheets coated with adhesive. The set of stacks of sheets coated with adhesive contained in the cylindrical support 55 can then be joined with a support that is to be inserted in the cavity 94 of the spout 90, which facilitates further the assembly of the set of stacks of sheets coated with adhesive on the supplier It will be clear further to one skilled in the art that a set of stacks of adhesive-coated sheets 70 wound as a roll and contained in a holder having an opening through which the substrate 50 can be extended can also be use with other dispensers of this invention that contain a cavity to support the set of stacks of sheets coated with adhesive. As illustrated in Figures 9A-9C, the spout 90 may further include portions 102a and 102b raised in the corners of the aperture 92. The pair of embossed portions 102A through 102b define a recess 103 in the short edges of the aperture 92. The raised portions 102a and 102b define recesses 103 that offer the advantage of guiding the fingers of a user holding a sheet coated with adhesive thereby facilitating delivery. The operation of supplying a sheet coated with adhesive from a stack of the stack assembly of the sheets coated with adhesive at the dispenser 90 is illustrated in Figures 6A to 6D. Figures 6A to 6B show a partial cross-sectional view through the supply window of the spout 90. As can be seen from these figures, by pulling the sheet 12 of the stack, the underlying sheet 14 will be released from the sheet 16 and the underlying sheet 14 and continuing to pull the sheet 12 which will eventually lead to the edge 20 of the sheet 14 through the opening 92. The subsequent pulling of the sheet 12 will then separate the sheet 12 from the sheet 14 while leaving the sheet 14 releasably adhered to the sheet 16 so that the supply operation can be repeated. Once a stacking of the assembly is finished, the next stacking can be placed below the opening 92 by pulling on the substrate 50. This operation is convenient, quick and easy. Accordingly, a user of rough use will have a large number of adhesive coated sheets available therefor without having to re-fill the dispenser as frequently as would be the case in a dispensing system such as the one described, for example, in US 5,401,547. An additional embodiment of a dispenser that can be used in connection with this invention is illustrated in Figures 10A and 10B. The spout of Figure 10A comprises a cartridge 121, preferably a disposable cartridge containing the set of stacks of the sheets 70 coated with adhesive in the form of a roll. The cartridge 121 contains an opening 126 that allows the delivery of individual sheets from a stack of the stack assembly of sheets coated with adhesive. As shown in Figure 10b, the cartridge 121 further includes a conveyor channel 129 connecting the opening 126 with an opening 127 through which the substrate 50 can be removed. The conveyor channel 129 is defined by the cartridge walls 121. and the spring 128. The spring 128 ensures that a stack 51 of the stack assembly of the adhesive coated sheets 50 is held in place during the delivery of the sheets therefrom. The dispenser further comprises a second part 122 which contains a cavity 123 for receiving a cartridge 121 and a coupling means 125 suitable for coupling with a coupling means 124 of the cartridge 121. The jet 130 illustrated in FIG. 11 is a dispenser including a transportable carrier as a means of transport. As shown in figure 11, the dispenser 130 includes a cover including an opening 132 through which individual coated sheets can be supplied. The cover 136 is provided with a hinge 137 that allows the cover to be opened for easy access to the interior of the dispenser and for mounting a set of stacks of sheets coated with adhesive therein. The set of stacks of sheets coated with adhesive is firmly attached to the transportable carrier comprising a rotating wheel 131. The outer surface of the wheel 131 is provided in a polygonal manner and the wheel 131 further includes an axially extending slot 133 in which the leading and trailing edge of the substrate can be inserted from the set of stacks of sheets coated with adhesive. This will ensure that the set of stacks of sheets coated with adhesive does not slip relative to the wheel 131 when the wheel 131 rotates. In addition, the width of each side of the polygonal outer surface of the wheel 131 preferably corresponds to the width of the stacks of the set of stacks of sheets coated with adhesive. Instead of the wheel 131, it is also possible to use a cylindrical core. The wheel 131 can be manually rotated by means of a knob 135. Advantageously, the wheel also includes a means for holding the wheel in a fixed position while supplying sheets coated with adhesive from a stack. With reference to Figures 12a-12c, a further embodiment of a dispenser containing a transportable carrier is illustrated. Figure 12a shows a front view of the spout 140. The spout 140 is an inclined cylindrical spout having an opening 142 through which individual sheets coated with adhesive can be supplied. Fig. 12b shows a cross section of a spout 140 along a plane that is parallel to the cylindrical spout axis and Fig. 12c shows a cross section of the spout 140 along a plane perpendicular to the cylindrical spout axis. As shown in Figures 12b and 12c, the dispenser 140 contains a transportable carrier comprising a rotating wheel 145. The wheel 145 can be removed from the top of the spout 140 for mounting a set of stacks of sheets coated with adhesive on the wheel 145. In a manner similar to that described above for the spout 130, the wheel includes a slot 147 which is extends axially into which the leading and trailing edge of a stacking assembly of adhesive-coated sheets can be inserted to securely attach the assembly to the wheel 145. In FIGS. 12d-g, further variants of the spout 140 are shown. shown in Figure 12d, the opening 142 can be provided with hemispheres 200 attached to the short edges of the opening 142 and centered around the middle part of the short edges. Such an embodiment has the advantage of reducing the risk of adhesive sheets accidentally disappearing in the opening 142. In FIG. 12e there is shown a variant of the dispenser 140 where, in the opening 142 of the supply means, an opening 202 of one can be superposed. different shape on the opening 142 via a coupling means 201 that is provided in the wall of the spout 140. Figure 12f shows a variant of the spout 140 wherein a transfer window 203 has been provided in the upper part of the opening 142. As shown by the arrows 204, the transfer window 203 will transfer up and down along the length of the aperture 142 during spout operation. Finally, Figure 12g shows a variant of the spout 140 in which the articulated opening 205 is superimposed on the opening 142 of the supply means. The hinged opening 205 can rotate around the hinge 206 showing the larger opening 142. This provides the advantage that the user can easily restart the supply in the case of a malfunction for example when a sheet has disappeared in the opening and there is no longer a sheet ready to be fastened. When it closes, the articulation opening 205 will immobilize the wheel 145 and prevent possible up and down movement of the wheel 145 during the delivery operation. Figures 13A-13C illustrate a dispenser 150 including a movable supply means 159 included within the supply window 152. The spout 150 comprises an arcuate surface 155 to which a set of stacks of sheets coated with adhesive adhere firmly, for example by slots (not shown) at each end of the arcuate surface 155 into which the leading edges may be inserted. and rear of the set of stacks of sheets 70 coated with adhesive. The portions 153 of an arched upper wall of the spout 150 extend from the side walls of the spout and define an opening 156 that extends from the end wall 157 to the end wall 158. The supply means 159 is provided under the upper wall portions 153 and comprises a supply window 152 and slides 154 which are supported by an arcuate surface 155. The slides 154 have a height so that the supply means can be easily moved between the upper wall portions 153 and the top of the stacks of the stack of sheets coated with adhesive. Accordingly, the dispenser means 159 can be slid from the end wall 158 to 157 so that each stack of the set of stacks of sheets coated with adhesive can be placed under the dispensing window of the dispensing means. The spout means further includes raised portions 151 in the corner of the supply window to provide a finger guide when a sheet is supplied from a stack. Various modifications and alterations of this invention will become apparent to those skilled in the art without departing from the scope and principles of this invention, and it should be understood that this invention should not be unduly limited by the illustrative embodiments set forth in the foregoing. All publications and patents are hereby incorporated by reference in the same degree to whether each individual publication or patent was specifically and individually indicated as incorporated by reference. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (20)

CLAIMS Having described the invention as above, the content of the following claims is claimed as property:

1. A set of stacks of sheets coated with adhesive comprising on a main surface of a substrate at least two stacks adhered to a substrate, each stacking is a stack of sheets placed one on top of the other, each of the sheets has a first and second ends separated and a predetermined length between the first and second ends, characterized in that it comprises a support having first and second opposing main surfaces and having a layer of pressure-sensitive adhesive on the main face of the sheet, the sheets they are releasably adhered to each other by releasable adhesion of the layers of pressure-sensitive adhesive, to the underlying sheet surfaces to form the stack with a first end (of each sheet in alignment with a second end of an adjacent sheet in the stack and the sheets have a first release means to provide a first level of adhesion throughout a pr The end portion of each of the sheets adjacent the first end between the adhesive layer and the surface of the adjacent sheet in the stack to which the adhesive layer adheres releasably provides easy separation from adjacent sheet surfaces. along the first end portion, and a second release means for providing a second level of adhesion along a second end portion of each of the sheets adjacent to the second end between the adhesive layer and the surface of the adjacent sheet in the stack, second level of adhesion which provides a release force that is greater than the release force along the first end portion and firmly adheres the sheet to an adjacent sheet in the stack during the separation of the sheets along the first end portion, while providing the detachment of the sheet from the stack along the e the second end portion.

2. A set of stacks of sheets coated with adhesive, wherein the substrate is a rigid arched substrate or a core and the stacks of sheets coated with adhesive adhere to the outer surface of the arcuate substrate or to the outer surface of the core.

3. The set of stacks of sheets coated with adhesive, according to claim 1, characterized in that the substrate is a flexible substrate.

4. The set of stacks of sheets coated with adhesive, according to claim 3, characterized in that the substrate comprises on the side opposite to the side to which the sheets coated with adhesive adhere, a joining means for adhering the set of sheets coated with adhesive. adhesive to a surface.

5. The set of stacks of sheets coated with adhesive, according to claim 3, characterized in that the flexible substrate has first and second opposite ends and the stacks adhere to one side of the flexible substrate one after the other from the second end towards the first end while leaving a portion of the flexible substrate at the first free end of the stacks of the sheets coated with adhesive so as to provide a leading edge to the set of stacks of the sheets coated with adhesive.

6. The set of stacks of sheets coated with adhesive, according to claim 5, characterized in that it also comprises a free portion of the stacks of the sheets coated with adhesive at the second end.

7. The set of stacks of sheets coated with adhesive, according to claim 3, characterized in that the flexible substrate has first and second opposite ends, the stacks of sheets coated with adhesive adhere to the flexible substrate as a continuous chain between the first and second. second ends and the flexible substrate further comprises a false pad adhered thereto adjacent to the stack of sheets coated with adhesive at one of the first and second ends.

8. The set of stacks of sheets coated with adhesive, according to claim 3 to 7, characterized in that the set of stacks of sheets coated with adhesive is in the form of a roller or a band.

9. The set of stacks of sheets coated with adhesive, according to claim 3, characterized in that the set of stacks of sheets coated with adhesive is contained in a cylindrical support containing an opening through which the leading edge extends.

10. The set of stacks of sheets coated with adhesive, according to claim 3, characterized in that the flexible substrate is selected from the group consisting of plastic film and paper.

11. A dispenser for supplying sheets from a stack of sheets, the stack of sheets is a stack from a set of stacks of sheets coated with adhesive from which each stack adheres to a substrate, the dispenser comprises walls defining the form of the dispenser, a supply means comprising an opening in one of the walls through which the sheets can be supplied from the stack, and a means for allowing the transport of each stack of the stack of sheets of sheets coated with adhesive under the opening of the supply medium.

12. The spout according to claim 11, characterized in that the means for allowing the transport of each stack of the set of sheets coated with adhesive comprises a conveyor channel connected to the opening of the supply means.

13. The spout according to claim 12, characterized in that the walls comprise a lower wall, an upper wall opposite the lower wall, opposite front and rear walls and opposite side walls, the front wall has an opening connecting to the conveyor channel and having dimensions so that at least the substrate of the stack of sheets coated with adhesive can pass through the opening.

14. The spout according to claim 13, characterized in that the walls comprise a lower wall, an upper wall opposite the lower wall, the upper wall comprises the opening of the supply means, the spout further comprises a cavity for holding a set of stacks of sheets coated with adhesive and the cavity is connected to the conveyor channel so that the set of stacks of sheets coated with adhesive can be transported from the cavity to the opening of the supply means.

15. The spout according to claim 14, characterized in that the spout comprises opposite side walls and an opposite front and rear wall, and the cavity and the conveyor channel extend through one of the side walls of the spout.

16. The spout according to claim 11, characterized in that the means for transporting the set of sheets coated with adhesive comprises a transportable conveyor on which the set of stacks of sheets coated with adhesive can be mounted.

17. The dispenser according to claim 16, characterized in that the transportable carrier comprises a wheel optionally comprising an axially extending groove.

18. The spout according to claim 11, characterized in that at least a portion of at least one of the walls of the spout is removable or articulated.

19. A dispenser for supplying sheets of a stack of sheets, the stack of sheets is a stack of a set of stacks of sheets coated with adhesive, the dispenser comprises walls that define the shape of the dispenser, a cavity that can contain the set of stacks of sheets coated with adhesive, a wall comprising an opening that allows access to the cavity and a supply means comprising a window through which the sheets of the stack can be supplied and the supply means is transportable so that each Stacking of the set of stacks of sheets coated with adhesive can be placed under the window of the supply medium.

20. The spout according to claim 19, characterized in that the wall comprising the opening of the supply means is arched.