Bag structure for pails

Abstract

A garbage disposal bag is disclosed. The bag has a tubular body with an open top end and a closed bottom end. The tubular body has a first section adjacent the open top end and at least a second section adjacent the closed bottom end. The first section has greater elasticity than the second section. When folded flat, the tubular body has a pair of side edges extending from a top edge to a bottom edge, the top edge defining the open top end and the bottom edge defining the closed bottom end.

Description

[Technical Field]

[0001] This application relates to a roll of bags used inside waste disposal units (which will be explained again below, but the term "disposal unit" may be used without distinction in content), such as kitchen waste containers, pails, compost bins, etc.

[0002] [Cross-reference of related applications] This application is a priority application claiming U.S. Patent Application No. 63 / 112,976, filed on 12 November 2020, which is referenced herein by reference and whose contents are incorporated herein by reference. [Background technology]

[0003] Disposal units, such as kitchen waste containers, pails, compost bins, and recycling bins (collection containers), are conventionally configured to support bags. For convenience and cost-effective packaging, bags are generally part of a bag roll (a roll of bags), with the bags connected to one another. In certain configurations, the bag roll is stored at the bottom of a pail or wire rack, and the free end of the bag roll is raised to be supported in an open position at the top of the pail or wire rack. Therefore, when a bag is full of waste or items, it is desirable to remove the full bag to allow for the use of the next bag in the roll to be deployed for receiving waste. However, as bags fill with waste, they become bulkier, making them difficult to remove from the pail or wire rack, especially when a full bag is being pulled upwards from the pail. [Overview of the project] [Problems that the invention aims to solve]

[0004] The object of the present invention is to provide a novel cassette for dispensing rolls of bags and / or garbage bags in small quantities. [Means for solving the problem]

[0005] According to the first aspect, a bag is provided having a tubular body with an open top end and a closed bottom end, wherein the tubular body has a first division adjacent to the open top end and at least a second division adjacent to the closed bottom end, the first division being more elastic than the second division, and in a flattened, folded form, the tubular body has a pair of side edges extending from the top edge to the bottom edge, the top edge defining the open top end and the bottom edge defining the closed bottom end.

[0006] According to a second view, a bag is provided having a tubular body with an open top end and a closed bottom end, wherein the tubular body has a first division adjacent to the open top end and at least a second division adjacent to the closed bottom end, surface features are provided only within the first division, the first division is more elastic than the second division, and in a flattened, folded form, the tubular body has a pair of side edges extending from the top edge to the bottom edge, the top edge defining the open top end and the bottom edge defining the closed bottom end.

[0007] In a third view, a bag is provided having a tubular body with an open top end and a closed bottom end, wherein the tubular body has a first division adjacent to the open top end and at least a second division adjacent to the closed bottom end, the first division has pleats formed in the material of the tubular body, the pleats are located only within the first division from the open top end of the tubular body, the first division is more elastic than the second division, and in a flattened folded form, the tubular body has a pair of side edges extending from the top edge to the bottom edge, the top edge defining the open top end and the bottom edge defining the closed bottom end.

[0008] According to any of the above viewpoints, for example, the surface feature portion is defined by a surface pattern including an array of depressions formed in the first section of the tubular body.

[0009] According to any of the above viewpoints, for example, the surface feature portion includes one of the following: a circular depression, a diamond-shaped depression, and a honeycomb-shaped depression.

[0010] According to any one of the above viewpoints, for example, the surface feature portion includes a line extending along at least one periphery of the embossed regions separated from each other by the non-embossed regions.

[0011] According to any one of the above viewpoints, for example, the surface feature portion includes a fold extending in a direction from the opening top end toward the closing bottom end.

[0012] According to any one of the above viewpoints, for example, the surface feature portion includes a fold that extends along the entire length of the first section from the opening top end without extending within the second section.

[0013] According to any one of the above viewpoints, for example, the surface feature portion includes a gap space specific to the fold and defining a pattern of adjacent thin regions and thick regions of the first section of the tubular body.

[0014] According to any one of the above viewpoints, for example, the surface feature portion extends over the entire surface of the first section of the tubular body.

[0015] According to any one of the above viewpoints, for example, the fold extends along the entire length of the first section from the opening top end without extending within the second section.

[0016] According to any one of the above viewpoints, for example, the fold is formed over the entire surface of the first section of the tubular body.

[0017] According to any one of the above viewpoints, for example, the first section of the tubular body has a breaking point elongation rate greater than that of the second section of the tubular body.

[0018] According to any one of the above viewpoints, for example, the first section of the tubular body has a breaking point elongation rate of 105% to 200% of that of the second section of the tubular body.

[0019] According to any of the above viewpoints, for example, the first section of the tubular body has a yield strength lower than that of the second section of the tubular body.

[0020] According to any of the above viewpoints, for example, the first section of the tubular body has a yield strength of 50% to 95% of the yield strength of the second section of the tubular body.

[0021] According to any of the above viewpoints, for example, the first section of the tubular body has a smaller modulus of elasticity than the second section of the tubular body.

[0022] According to any of the above viewpoints, for example, the first division is the apex division, the second division is the middle division, the tubular body further has a bottom division defining the closed bottom end, the apex division has length LA, the middle division has length LB, the bottom division has length LC, and length LA is less than LB + LC.

[0023] According to any of the above viewpoints, for example, the first section has a length LA extending from the opening apex, the second section extends from the first section to the closed bottom end, the second section has a length LB, and length LA is 5% to 20% of length LB.

[0024] According to any of the above perspectives, for example, the first section has a length LA extending from the opening apex, the second section extends from the first section to the closed bottom end, the second section has a length LB, and length LA is 5% to 10% of length LB.

[0025] According to any of the above viewpoints, for example, the first section has a length LA extending from the opening apex, the second section extends from the first section to the closed bottom, the second section has a length LB, and length LA is less than 1 / 3 of length LB.

[0026] From another perspective, a bag roll comprising a plurality of bags according to any of the above perspectives, wherein the bags are connected with their ends butted together, and the roll extends from the bottom edge of the first bag in the bag roll to the top edge of the second bag in the bag roll.

[0027] From another perspective, a bag dispensing cassette is provided, characterized in that it has a bag roll and a container that encloses at least a portion of the bag roll.

[0028] From another perspective, a bag dispensing cassette is provided, comprising a tubular film constituting a plurality of bags according to any of the above perspectives, and a container surrounding at least a portion of the plurality of bags, wherein the plurality of bags are connected with their ends butted together and connected from the bottom edge of the first bag to the top edge of the second bag, and the tubular film is stored in a fan-like or multi-folded form. [Brief explanation of the drawing]

[0029] [Figure 1] This is a perspective view of a bag roll according to one embodiment of the present invention. [Figure 2] This is a perspective view of a bag roll cassette according to the present invention, which includes, for example, the bag roll shown in Figure 1. [Figure 3] Figure 2 is a perspective view of the bag roll cassette inside the divided waste disposal unit. [Figure 4] Figure 3 is a cross-sectional view of the bag roll cassette and waste disposal unit. [Figure 5A] Figure 1 is a plan view of the top edge contour for the bags of the bag roll. [Figure 5B] Figure 1 is a plan view of the top edge contour for the bags of the bag roll. [Figure 5C] Figure 1 is a plan view of the top edge contour for the bags of the bag roll. [Figure 6] This is a perspective view of another embodiment of the present invention, for example, of a bag roll shown in Figure 1. [Figure 7] This is a perspective view of a film dispensing cassette, and for example, it shows the bags in the bag roll in Figures 1 and 6 in a different storage configuration. [Modes for carrying out the invention]

[0030] Referring to the drawings, and in particular to Figures 1 and 2, the bag roll cassette is shown as a whole by reference numeral 10 (Figure 2). The bag roll cassette 10 preferably has a bag roll 20 wound on a cylinder 30 (as shown in Figure 1) and inserted into a cassette body 40. The bag roll 20 according to the present invention may also have the cylinder 30 and / or the cassette body 40, or it may not. The figures show a bag roll 10, but the bags of any of the figures may be provided individually, i.e., not as part of a roll, or in a zigzag pattern (fan) (Figure 7).

[0031] The bag roll 20 is shown in more detail in Figure 1. The bag roll 20 is preferably made of a film of plastic material. For example, depending on the intended use, the plastic material may be plastic, such as polyethylene (LDPE, LLDPE, or HDPE), bioplastic, or polylactic acid, to name just a few of the many possible materials. It is also conceivable that a functional layer may be added to the plastic film, such as ethylene vinyl alcohol (EVOH) to form an odor or malodorous barrier, or a nylon layer to reinforce the bag. The film may also be made of a biodegradable and / or compostable material, such as a starch-based or plant-based material. As will be described in detail below, the bag roll 20 may be made in part from different materials, for example, different plastic materials, thereby obtaining different mechanical properties (e.g., different levels of elasticity, modulus of elasticity, tensile strength, elongation at break, etc.), chemical properties (e.g., fluid impermeability / permeability, for example, gas impermeability or liquid impermeability, etc.) and / or other properties as described above at selected locations / sections along the length and / or width of the bag roll 20.

[0032] The bag roll 20 is preferably in the form of a tubular film of a certain length, with weld lines and perforation lines defining multiple bags that are joined together at their ends, indicated by reference numerals 20', 20'', etc. The tubular film is preferably piled up on the roll in a zigzag pattern or the like. As a result, the bag roll 20 may appear to be a continuous sheet material as shown in Figure 1 due to the thinness of the film, however, the bag roll 20 has a pair of panels 21 that are overlapped and joined at the side edges 22. In one embodiment, this is called the flattened bi-fold state of the bag, that is, the bag has two folds, i.e., at each side edge 22, and there is no gusset. The bags of the bag roll 20 may have gussets according to the present invention, but the lateral dimensions of the bag may be described as being in the flattened bi-fold state. This is because even if the bag roll 20 has gussets, the bag may be described as being in the flattened bi-fold state. It may be understood that the dimensions refer to the lateral dimensions of the bag as if it were folded. Even if the bags described herein are not packaged or sold in a flattened, folded state (the bags may have more folds or be folded back themselves), the flattened, folded state is a state in which the bag is laid flat on a surface and has two lateral folds—two side edges—between the top and bottom edges. Furthermore, the bag is referred to as unstretched. This may be understood to mean that the bag is in these initial states on the bag roll 20 before the user mounts the bag onto a disposal unit and before the user handles the bag, which may involve some elastic or plastic deformation. The bags in the initial state on the bag roll 20 may have been plastically pre-stretched during manufacturing, but despite such pre-stretching, these states on the bag roll 20 are said to be unstretched.

[0033] The side edges 22 of each bag extend from the top edge 23 to the bottom edge 24 of each bag, for example, bag 20'. When the ends of the bag roll 20 are connected, the bags are connected to each other such that the bottom edge 24 of the leading bag connects to the top edge 23 of the following bag on the bag roll 20, in contrast to bag rolls where the bottom or top edges of adjacent bags are connected to each other. The bags 20', 20'' of the bag roll 20 have a constant width when laid flat, i.e., in a flattened, folded state. For example, as shown in the figure, the side edges 22 are parallel to each other along the entire length of the bag from the bag roll 20. However, it is also conceivable to taper the bag from the top edge 23 to the bottom edge 24.

[0034] The bag may have two, three, or four or more separate sections. As shown in the figure, each bag, for example, bag 20', has a top section 20A, which may be called a hook section, a middle section 20B, which may be called a disposable section, and a bottom section 20C, which may be called a closed end section. The middle section 20B or bottom section 20C may be optional, and the middle section 20B and bottom section 20C may be considered the same section if, for example, the dimensions and / or properties of these sections are the same from the top section 20A to the bottom edge of bag 20'. In other words, the middle section 20B and bottom section 20C do not have relatively different characteristics from each other with respect to their elasticity and / or dimensions, such as width, or other properties. As shown in the figure, the top section 20A, middle section 20B, and bottom section 20C extend continuously from the top edge 23 to the bottom edge 24, in which case no separating line is provided. However, at least the top section 20A has different mechanical and / or chemical properties from the middle section 20B and / or the bottom section 20C. The top section 20A has greater elasticity than the middle section 20B and / or the bottom section 20C. For example, when the bag 20' is opened to its maximum opening diameter in the transverse direction with respect to the length of the bag 20', which may coincide with the circumferential or peripheral direction of the bag 20', the top section 20A may be stretched non-permanently (i.e., elastically) or plastically without tearing when subjected to a given tensile load, thereby expanding the opening diameter of the bag 20' at the top section 20A while the middle section 20B remains unstretched when the same given tensile load is not applied to the middle section 20B. In at least some applications of the bag 20', such stretching of the top section 20A allows the top section 20A to be properly hooked onto the bag support 56 of the disposal unit 50 (Figure 3, which will be described in more detail below), and the stretching of the middle section 20B is small or no, which allows for good control of the maximum volume and / or space that the bag 20' occupies within the disposal unit 50 when the bag 20' is filled with waste.

[0035] In the stretched (elastically) state of bags 20, 20', in at least some embodiments where the top section 20A is attached to the bag support 56 and stretched taut thereon (for example, partially folded over the tubular bag support 56, as will be described in more detail below with reference to Figure 4), the top section 20A can apply a contractile force (due to elastic recovery) to the bag support 56, thereby securing the top section 20A of bags 20, 20' to the bag support 56 without additional components (e.g., drawstrings, bands, clips, clamps, etc.). For use in the disposable unit 50 disclosed herein, a suitable balance between bag retention force and manual stretching with limited (or effortless) user intervention can be envisioned. The top section 20A, applying a desired level of contractile force, can result in the bag being retained by the bag support 56 when bags 20, 20' are filled with garbage (e.g., up to 4 kg of garbage) and pulled downward by the weight of the garbage. The elasticity of the top section 20A allows for manual stretching of the bags 20, 20' while attaching and / or removing the bags from the bag support 56, reducing the hassle. The mechanical retention or bag fixing force at the top section 20A can be provided by the geometric dimensions and / or shape of the tubular bag support 56, in which case, in some embodiments, no such contraction force is generated due to elastic recovery. In such cases, when the bag 20' is filled with garbage (e.g., up to 4 kg of garbage) and pulled downward by the weight of the garbage, mechanical retention can still be obtained by the feature of the tubular bag support 56 that engages with the top section 20A.

[0036] In at least some embodiments, the difference in elasticity between the top section 20A and the intermediate section 20B and / or bottom section 20C can be determined by the difference in elasticity of the tubular film of the top section 20A and the intermediate section 20B and / or bottom section 20C. For example, in one embodiment, the top section 20A is made of an elastically stretchable film, while the rest of the bag 20 is not. The top section 20A may constitute the elastic band-forming portion of the bag compared to the rest of the bag 20'. The top section 20A may be a variant of LLDPE. In contrast, the rest of the bag 20' may be made of a film that does not elastically stretch even when garbage is placed inside the bag or when tension is applied to the lower part of the bag. The difference in elasticity may be obtained, for example, by making the thickness of the top section 20A smaller than the thickness of the intermediate section 20B and / or bottom section 20C. In some embodiments, for example, the top section 20A may have a thickness of 50% to 95% of the thickness of the intermediate section 20B, 75% to 95% in some specific cases, and 85% to 95% in some more specific cases. As another example, an elastic material band may be embedded between the layers of material forming the top section 20A. Depending on the manufacturing process, the top section 20A may be welded to the remainder of the bag 20, for example, by ultrasonic welding. Adhesives can be used as another possible option.

[0037] As yet another example, the difference in elasticity and / or stretchability between the top section 20A and the intermediate section 20B can be obtained by a surface treatment applied to the top section 20A but not to the rest of the bag 20. The surface treatment preferably includes one or more surface features. Examples of such surface treatments are shown in Figure 1 as 23A and 23B.

[0038] As shown in Figure 1, the exemplary surface feature portion 23A is comprised by a surface pattern consisting of, for example, embossed (indented), pre-stretched, or deformed areas of the tubular film of the apex portion 20A. In some embodiments, the surface pattern can define an embossed area surrounded by smooth surface areas that define the contour of the embossed area. In one embodiment, the surface pattern may include one or more peripherally extending lines of embossed, pre-stretched, or deformed areas separated from each other by untreated areas (e.g., unembossed, unstretched, and undeformed), so that elastic and / or plastic deformation of the apex portion 20A occurs when the tensile load in the transverse direction with respect to the length L of the bag 20 in the area defined by the surface pattern exceeds the tensile load. In one embodiment, the surface pattern may include an array of dimples (e.g., circular, diamond, or honeycomb) formed on the tubular film.

[0039] As shown in Figure 1, the exemplary surface feature portion 23B is formed by folds or wrinkles extending in the direction of the length of the tubular film (or the length of the bag). As shown in the figure, the folds may extend from the apex along the entire length LA of the apex portion 20A, and in this case, not in the intermediate portion 20B. In other embodiments, the folds may extend in the peripheral direction, i.e., in the direction perpendicular to the length L of the bag 20. In yet another embodiment, the surface feature portion may include folds extending in two or more directions, for example, in the direction of the length L of the bag and in the direction perpendicular to the length of the bag. Depending on the embodiment, the folds may be of uniform or uneven width. The folds and the gaps inherent in the folds may define the pattern of adjacent thin and thick regions of the tubular film.

[0040] The example surface features 23A and 23B represent several possible options, however, other surface features may be conceivable to enhance the elasticity of the apex section 20A in contrast to other sections of the bag 20. The surface features 20A and 20B may, for example, be uniformly or non-uniformly distributed within the apex section 20A, spread across the entire surface of the apex section 20A, or formed at selected locations on such surface.

[0041] In embodiments where the tubular film includes multiple material layers, the surface feature portion is characterized by defining the zones containing the material layers within the apex section 20A, and the number of such material layers is fewer than the material layers in other zones. Therefore, stretching can be easily performed in some zones of the apex section 20A compared to other zones of the apex section 20A.

[0042] In another embodiment, such surface treatment may be applied only to the intermediate section 20B and / or the bottom section 20C, that is, the top section 20A may not be treated, and as a result, the elasticity of the intermediate section 20B will be reduced.

[0043] To obtain the surface treatment and / or surface features described herein, for example, a tubular film (or its segments) may be pressed between complementary press plates or between rollers of a rotary press. Such rollers may be notched or ribbed for mechanically imprinting the surface features onto the material of the tubular film. Such a process may be carried out with or without heating the press plates or rollers, for example, by a cold rolling process. For example, the process may be planned by heating segments of the tubular film and forming the surface features, for example, by rollers or flat embossing.

[0044] In at least some embodiments, the tubular film of the top section 20A has a higher elongation at break than the elongation at break of the intermediate section 20B, i.e., the allowable elongation before the film breaks. For example, in one embodiment, the elongation at break of the tubular film of the top section 20A is 105% to 200% of the elongation at break of the tubular film of the intermediate section 20B. Additionally or alternatively, the tubular film of the top section 20A may have a lower yield strength than the yield strength of the intermediate section 20B. That is, given a tensile load (e.g., 10 pounds (4.536 kg)) applied to the tubular film of the top section 20A, the top section 20A may stretch elastically or plastically without tearing, whereas the intermediate section 20B may not. For example, in some cases, the yield strength of the tubular film of the top section 20A is 50% to 95% of the yield strength of the intermediate section 20B. The difference in yield strength between the top section 20A and the intermediate section 20B is preferably selected to limit the tendency of the intermediate section 20B to be stretched undesirably when the top section 20A is stretched. Additionally or alternatively, the tubular film of the top section 20A may have a lower modulus of elasticity than the intermediate section 20B. For example, in some cases, the ratio of the modulus of elasticity of the tubular film of the top section 20A to the modulus of elasticity of the tubular film of the intermediate section 20B is 3:10 to 9:10, in some cases this ratio is 4:10 to 8:10, in some cases this ratio is 5:10 to 7:10, and in other embodiments the ratio of the modulus of elasticity of the tubular film of the top section 20A to the modulus of elasticity of the tubular film of the intermediate section 20B may be less than 3:10. In embodiments in which one section of the tubular film or the entire tubular film has layers of different materials, the modulus of elasticity or yield strength is the “composite” modulus of elasticity or yield strength of the tubular film including the combined layers of materials. The elongation at the breaking point and other properties described above are preferably determined in the circumferential or peripheral direction, which is perpendicular to the length of the tubular film. Measurement of these properties in various sections of the tubular film is preferably carried out using standardized test methods described in ASTM standards, where applicable.

[0045] While the top section 20A and the intermediate section 20B were compared above in terms of differences in properties, the top section 20A can also be compared with the bottom section 20C. In at least some embodiments, the comparative characteristics and values ​​described above with reference to the top section 20A and the intermediate section 20B are identical when considering the top section 20A and the bottom section 20C. For example, this may occur in embodiments where the intermediate section 20B and the bottom section 20C have the same composition and / or mechanical properties.

[0046] In one embodiment, the tubular film of the top section 20A and the intermediate section 20B includes a layer of EVOH to form an odor barrier. Indeed, the EVOH layer is preferably extended within the bottom section 20C to maximize the odor barrier function. In other embodiments, the EVOH layer can be omitted with respect to the top section 20A, but is preferably present in the intermediate section 20B and the bottom section 20C. The bag, for example, bag 20', is preferably closed by creating a knot at the opening top end of bag 20' when full of garbage, with the top section 20A remaining on the knot (i.e., the top section 20A not in contact with the garbage). Therefore, odor control of the top section 20A may be optional depending on the intended use. In certain embodiments, the tubular film of the top section 20A comprises LLDPE, and the tubular film of the intermediate section 20B and the bottom section 20C comprises HDPE, in which case one or more layers of LLDPE may or may not be provided.

[0047] In one embodiment, it is preferable to stretch only the top section 20A, or to stretch the top section 20A substantially more than the middle section 20B (and / or bottom section 20C), in contrast to stretching or deforming the entire bag 20', including the middle section 20B and bottom section 20C, while filling the bag with waste. This facilitates the removal of the bag from the disposal unit 50, as will be further described later. Such differences in stretchability described above may be obtained by different thicknesses, different materials, different numbers of material layers within one or more sections of the bag, and / or by surface treatments applied only to selected sections of the tubular film, for example, the top section 20A, but not to, for example, the middle section 20B and / or bottom section 20C.

[0048] In the illustrated embodiment, the bag does not have a taper, and thus there is a direct transition from the top section 20A to the intermediate section 20B. Another possible option is that a bottleneck intermediate section may exist between the top section 20A and the intermediate section 20B.

[0049] In the illustrated embodiment, the bag of the bag roll 20 is straight from the top edge 23 to the bottom edge 24 with a constant width. For clarity, the width described herein is the width in a flat state, as in Figure 1, that is, the width when the bag of the roll is in a flat, folded state with the panel 21 located in the same plane. The expression “straight” is used in this context, but the side edges are preferably tapered. The expression “straight” is used herein to distinguish between purposes in a non-limiting manner. For example, in other embodiments, the side edges 22 of the top section 20A are shown as straight and parallel to each other in the embodiments of Figures 1 and 2, but are preferably tapered toward the bottom edge 24 while still being considered “straight”. Similarly, the side edges 22 of the top section 20B are shown as straight and parallel to each other in the embodiments of Figures 1 and 2, but are preferably tapered toward the bottom edge 24 while still being considered “straight”. In yet another embodiment, the side edges 22 may be continuously tapered from the top edge 23 to the bottom edge 24 at a continuous angle or at two (more than two) different angles, i.e., one angle for section 20A, another angle for section 20B, and yet another angle for section 20C. In yet another embodiment, the bag 20' (whether or not it is part of the roll 20) has side edges 22 that are located at the top section 20A and are parallel or pseudo-parallel to each other so as to taper beyond the top section 20A.

[0050] The top section 20A has a width WA, and the middle section 20B has a width WB, and the widths WA and WB are substantially the same over most or all of sections 20A and 20B, respectively, in a flattened, folded state prior to attachment of the bag. The side edges 22 of the top section 20A and the middle section 20B are parallel to each other, as in Figure 1. If sections 20A and 20B taper toward the bottom edge 24 (not shown), the top section 20A has a minimum width WA that is greater than the average width WB taken along the middle section 20B. For example, the width ratio is as follows: 0.60WA ≤ WB (average) ≤ 0.99WA. In another embodiment, it is 0.65WA ≤ WB (average) ≤ 0.85WA.

[0051] The bag, for example, bag 20', has a length L, which is preferably segmented as LA, LB, and LC, representing the heights of sections 20A, 20B, and 20C, respectively. In one embodiment, LB is at least three times the length of LA, i.e., LB > 3LA. In other words, it is preferable that length LA is less than 1 / 3 of length LB. In one embodiment, such relative dimensions of LA and LB correspond to having a length of 5% to 20% of length LB (or LB + LC). In a particular embodiment, length LA is 5% to 10% of length LB (or LB + LC). By minimizing dimension LA relative to the length L of bag 20' and / or maximizing length LB relative to the entire length L of bag 20', it is possible to achieve a large volume of bag 20' dedicated to waste collection without stretching (or substantially without stretching) while allowing the top section 20A to have a sufficient length LA to facilitate attachment of the top section 20A onto the tubular bag support 50. According to another embodiment including a bottom section 20C, LB+LC is at least three times the length LA, and LB+LC > 3LA. The length LA is preferably relatively small relative to LB and / or LB+LC. The top section 20A, in the case of a waste disposal unit, preferably does not extend beyond the tubular bag support 56, so that the waste or other objects in the bag 20' can be located within the volume of the bag that is surrounded by one or both of the middle section 20B and the bottom section 20C but not surrounded by the top section 20A.

[0052] LA is preferably divided into LA1 and LA2 when the apex 23 defines a concave or convex shape as described below. LA2 is the portion of section 20A located below such concave or convex shape (Figures 5B and 5C).

[0053] Referring to Figures 1 and 5A-5C, the top edges 23 may have different contours. In Figure 1, the contour of the top edge 23 is a straight contour. Exemplary contours, for example, (A) a straight contour, (B) a convex sinusoidal contour, and (C) a concave arc contour are shown in Figures 5A-5C. Since the bag in the roll 20 is a pair of overlapping panels 21 as in Figure 1, when the panels 21 are separated from each other so that the bag opens at the top edge 23, the non-linear contours in Figures 5B and 5C each form a pair of flaps that can be used to form a fastening portion for attaching the bag to a closed state. Since adjacent bags are joined end to end within the bag roll 20 with their bottoms and tops connected to each other as described above, the bottom edge 24 has a shape complementary to the top edge 23. In other words, if the contour of the apex 23 is a concave sine wave, then the base 24 is a convex sine wave, and so on.

[0054] As shown in the figure, a weld seam (or simply “seam”) 25 extends from one side edge 22 to the other, connecting the panels 21 to each other. The weld seam 25 is often made by any suitable welding or bonding method, such as thermal welding, and is therefore referred to as a weld seam in this specification, although other types of joining methods, such as adhesive bonding, are also assumed. As shown in the figure, the weld seam 25 has a portion that defines a closed bottom end such as a bag 20′, 20″.

[0055] In the embodiment shown in Figure 1, the side edges 22 of the top section 20A and the intermediate section 20B are two folds of the tubular film as described above for the flattened bi-fold state, and these folds define the boundaries between the panels 21. In Figure 1, the bottom section 20C includes a weld seam 25 that extends at an angle from a weld seam 25 that extends along the bottom edge 24 to the side edge 22. For clarity, the expression "weld seam 25" is sometimes used in the plural form, but a single continuous weld seam 25 including multiple connecting sections may be provided. If the weld seam 25 has a taper as in Figure 1, such tapered section 20C has a length LC that is, for example, part of the length LB, for example, 3LC, so as not to excessively reduce the volume of the bag. <LBである。

[0056] The bags 20′, 20″ of the bag roll, when laid flat, i.e., in a flattened, folded state, have a constant width. For example, the side edges 22 are parallel to each other along the entire length of the bag from the bag roll 20. However, since a welded seam 25 offset inward from the edge segment 22C is provided in the bottom section 20C, the inner dimensions of the bag at WC decrease within the bottom section 20C in terms of inner diameter. As shown in the figure, the welded seam 25 defines a tapered section within the bottom section 20C toward the bottom edge 24, i.e., a portion of the bag where the inner diameter decreases. Due to this decrease in inner diameter, the bag, For example, the tapering of the welded seam 25 within the bottom section 20C is defined toward the welded seam 25 extending along the bottom edge 24 shown on the bag 20'. The tapering of the inner diameter of the bag within the bottom section 20C eliminates (or at least limits) the tendency for waste inside the bag to accumulate in the bottom corners of the bag, which would occur if the bottom section 20C were not tapered. In some cases, such accumulation of waste in the bottom corners may prevent the removal of the bag filled with waste from the top of the disposal unit (described in detail below).

[0057] Preferably, a flap is formed on the outside of the weld seam 25 of the bottom section 20C. As shown in the figure, the weld seam 25 (or several portions of the continuous weld seam 25) extends at an angle to the side edge 22 of the bottom section 20C to form a taper on the inner circumference of the opening, thereby forming a flap. As can be understood, a triangular-shaped flap extends along the weld seam 25 along the side edge 22 of the bottom section 20C of the bag 20'. The flap may also be of other shapes, such as a curved V-shape. In all embodiments described herein, it is preferable to have a single side portion with respect to the weld seam 25 (i.e., a single side portion extending along one side edge 22 of the bottom section 20C) in contrast to the two side portions shown, while still achieving the tapering described herein. The bag 20' in Figure 1—or all figures—may also be commercially available as individual units, i.e., not as part of a bag roll.

[0058] Accordingly, according to one embodiment, the weld seam 25 is periodically formed within a straight, continuous tube—a continuous tubular body—in a flattened, folded state. For example, as shown in the figure, in at least some embodiments, the weld seam 25 defines the closed bottom end of the bag and defines the tapered inner dimension of the bottom section 20C of the bag. In some embodiments, the weld seam 25 may extend along one of the intermediate edge segments 22B, the other intermediate edge segment 22B being partially or entirely defined by a fold, as described above for the flattened, folded state. The same can be said for the top edge segment 22A. In some other embodiments, the weld seam 25 may extend along both side edges 22 (i.e., the top edge segment 22A and / or intermediate segments 22B). The weld seam 25 may extend to the top edge 23 or top section 20A, as a possible alternative.

[0059] The perforated tear line 26 is located at the joint between the bottom edge 24 of the first bag, i.e., the leading bag, for example, bag 20', and the top edge 23 of the next bag in the bag roll 20, i.e., the succeeding bag, for example, bag 20''. The perforated tear line 26 is preferably composed of a series of spaced holes along a contour that mimics the contours of the bottom edge 24 and the top edge 23. The perforated tear line 26 is located adjacent to the weld seam 25, which forms a weakened portion of the bag roll 20, thereby separating one of the bags, for example, bag 20' in Figures 1 and 2, as a result of a tearing action. As shown, the perforated tear line 26 is offset from the weld seam 25 extending along the bottom edge 24 at the joint between the leading bag and the succeeding bag, for example, bag 20' and bag 20''. A band of material extending between the bottom edge 24 and the perforated line 26 may be referred to as a flap, as described above. In some embodiments, such a flap between the bottom edge 24 and the perforated line 26 may be omitted or provided in a minimal manner. This is the case, for example, when the perforated line at reference numeral 26 is aligned with or pseudo-aligned with the welded seam 25 to form, for example, the closed bottom edge of the bag. In one embodiment, notches at the sides of the perforated line 26 and the welded seam 25 are made by punching.

[0060] Referring to Figure 2, the bag roll 20 is preferably inserted into a cassette body 40, which is a container for the bag roll 20. The cassette body 40 may have a slit 41 or similar opening, such as a top opening, through which the free end of the bag roll 20 is inserted. The cassette body 40 is shown as having a cubic geometric shape, however other shapes, such as a right-angle prism or a cylindrical body, may also be considered.

[0061] Referring next to Figures 3 and 4, the bag roll 20 as part of the cassette 10 (Figure 3), or as the bag roll 20 alone (Figure 4), i.e., the bag roll 20 without the cassette body 40, is received within the disposal unit 50. The term “disposal unit” is used herein to include kitchen waste bins, diaper pails, compost bins, recycling bins, litter pails, etc. The disposal unit 50 may have a bottom or base 51, from which an upright wall 52 protrudes. The upright wall 52 is in the form of a cylindrical tube in Figure 3, but may have other shapes, for example, a square cross-section, an oval cross-section, etc. Although not shown, a hinged door may be part of the upright wall 52 to allow access to the interior of the disposal unit 50. Another possible option is that the upright wall 52 may be lifted and disengaged from the base 51. Various types of connections, such as quick-connection mechanisms and fasteners, may be provided. The cover 53 is attached to the top of the upright wall 52. The cover 53 preferably has a central opening with a downwardly projecting rim 53A, which is in close contact with or in contact with the bag so that the bag remains hooked onto the disposal unit 50 as shown in Figure 4. Furthermore, the central opening of the cover 53 shown in Figure 3 may be closed by a trap door 54 (also called a lid) hinged to the rest of the cover 53, 53A. The trap door 54 opens and closes the top entrance to allow access to the inner cavity 55 of the disposal unit 50. The trap door may be lifted by a spring or operated by a pedal mechanism or the like. In addition, although not shown, a closing mechanism of any suitable form (translational, rotational) may be provided inside the inner cavity 55 of the disposal unit 50 or elsewhere to squeeze the bag into a closed state.

[0062] The disposal unit 50 has a tubular bag support 56 adjacent to the cover 53. In one embodiment, the annular bag support 56 may have any suitable shape, and this annular bag support is shown as being cylindrical with a circular cross-section. Other possible cross-sectional shapes include, without limitation, square, rectangular, oval, rounded square, pentagonal, hexagonal, octagonal, etc. Thus, the expression "tubular" for the tubular bag support 56 includes these multiple shapes. The tubular bag support 56 has a height H S , an inner circumference C S , an outer circumference C O and a wall thickness T. In the embodiment of FIG. 3 where the tubular bag support 56 is circular with an inner diameter D S , the inner circumference C S is equal to πD S . The outer circumference C O can be expressed as π(D S + 2T). In another embodiment, the disposal unit 50 has two or more hooks that act as the bag support 56. The description of FIG. 4 can be interpreted as having two elongated straight or curved hooks 56 shown in cross-section. Such hooks are also provided in the exemplary waste disposal device described in the international application PCT / CA2019 / 051346, which is hereby incorporated by reference in its entirety and made part of this specification. In the embodiment where such hooks are provided, the height H S should be the height H S of the hook measured from the base of the hook to the protruding end or edge of the hook. The above dimensions D S , C S , C O , T should correspond to the maximum distance (D S ) between hooks located opposite each other, the contour that extends along the inner surface (facing inward towards the central opening of the tubular bag support 56) and connects the ends of hooks on opposite sides of each other (C S ), the contour measured as the chord length (C O ) that forms a closed loop around the hook, and the maximum thickness (T) of each hook, respectively.

[0063] The funnel-shaped portion 57 is optional and is preferably positioned below the tubular bag support 56 when viewed in an upright orientation of the waste disposal container 50, but it is not required. The funnel-shaped portion 57 has a central opening that is preferably the same shape as the tubular bag support 56. Therefore, in Figure 3, the funnel-shaped portion 57 has a circumference C F and inner diameter D F It has a truncated conical shape with a central circular opening having a funnel-shaped section 57. The height of the funnel-shaped section 57 is H F This is shown as follows: In one embodiment, the funnel-shaped portion 57 is located directly below the tubular bag support 56, thereby the height H from the top edge of the tubular bag support 56 to the end of the central opening of the funnel-shaped portion 57. T H is as follows, that is, T =H F +H S In one embodiment, the funnel-shaped portion 57 is positioned at a distance from the tubular bag support 56, thereby H T The separation value should include a separation value along the vertical axis of the waste container 50. The funnel-shaped portion 57 gathers items such as waste placed in the unfolded bag towards the center so that the overall structure remains compact even when the bag is full. Thus, in some embodiments, i.e., by pulling upward by the user, the funnel-shaped portion 57 facilitates the removal of a full bag from the top of the disposal unit 50. In embodiments where the disposal unit 50 is, for example, as described in international application PCT / CA2019 / 051346, the maximum distance between hooks located on opposite sides of each other should be greater than the maximum distance of the central opening defined by the tubular bag support 56 through which the bag in the internal volume of the disposal unit 50 is inserted.

[0064] As observed in Figures 3 and 4, the bag roll cassette 10 or bag roll 20 is located at the bottom of the disposal unit 50. In one embodiment, a connecting section is provided for holding the bag roll cassette 10 or bag roll 20 by a base 51, although the bag roll cassette 10 or bag roll 20 may simply rest on the base 51 and remain in place at the bottom of the disposal unit 50 by gravity. The free end of the bag roll 20 extends upward to partially fold the top section 20A of the bag 20' onto the tubular bag support 56. In this manner, the opening top end of the bag 20' is kept open for throwing objects into the bag 20'. The remainder of the bag 20', including the middle section 20B and the bottom section 20C, extends into the inner cavity 55 of the waste bin 50. The bag 20' is attached to the tubular bag support 56, but this bag 20' remains connected to the bag roll 20, as shown in Figure 3.

[0065] In order for the bag 20' to remain attached to the tubular bag support 56, the bag 20' preferably has a given unstretched lateral flattened folded width WA of the top section 20A, which is represented as follows: i.e., 0.9C O / 2≦WA≦(C O ( / 2)

[0066] If the tubular bag support 56 is circular, the bag 20' takes on a circular shape when hooked onto the tubular bag support 56, as shown in Figure 3. The diameter D at the opening of the bag 20' in its unstretched state in Figure 3 is 0.9 (C S (π + 2T) ≤ D ≤ (C SIt can be expressed as (π + 2T). If the bag is not circular when deployed in an open state, for example, if the tubular bag support 56 is not circular, the bag may conform to the following relationship, i.e., 0.9POL / 2 ≤ WA ≤ POL / 2, where POL is the contour of the tubular support 56 measured at the position where the top section 20A of the bag 20' is fixed to the tubular bag support 56, and WA is the width of the unstretched lateral flattened double fold. In at least some embodiments, such a location where the contour is measured is at two or more hooks defined by the tubular bag support 56 as described above with reference to Figure 4, and such a contour may be measured as the chord length forming a closed loop around two or more hooks. Next, the top section 20A is preferably stretched elastically or plastically without tearing, thereby widening the diameter D and / or its top opening, so that the top section 20A can be partially folded over onto the tubular bag support 56, and then, in embodiments where elastic recovery is possible, the top section 20A is released to be fixed onto the bag support 56 using the elastic recovery force, or is simply held mechanically by two or more hooks that engage with the top section 20A.

[0067] To maximize the amount of waste per unit length of tubular film, the bags for Roll 20 are LA <H T +H S It is best to follow this. The roll 20 bags are also 1.5H in the case of bags having the contours shown in Figures 5B and 5C. S ≤LA2≦2H S It is preferable to follow this, so that the sub-section of bag section 20A with length LA2 extends to at least half the circumference of the tubular bag support 56 when it is stretched taut. Dimension LA2 is H S The above formula is part of the formula related to the above, but it can be said that the above formula also applies to dimension LA1. If the bag has the contour of Figure 1 and Figure 5A, the bag of roll 20 is 1.5H S ≤LA≦2H S It is preferable to follow this, and as a result, the bag section 20A extends to at least half the outer circumference of the tubular bag support 56 when it is stretched taut.

[0068] Even when full of garbage, the elasticity and / or stretchability of the intermediate section 20B and / or bottom section 20C is lacking (or limited), so even though a funnel-shaped section 57 and a closing mechanism (not shown) are provided and / or an opening in the tubular bag support 56 for passing garbage when it is discarded into the bag 20' is provided, the full bag can be easily removed by pulling it upwards. Because the funnel-shaped section 57 is provided, the bag of the roll 20 is as follows, i.e., WB ≤ C F It is preferable that the roll 20 has a given unstretched lateral flattened folded width WB, expressed as / 2. As described above, it is preferable that the intermediate section 20B is not stretchable, or that its degree of stretching is substantially less than that of the top section 20A. Therefore, even when filled with material, the bag on the roll 20 can be pulled out of the trash can 50 from the top, i.e., through the funnel-shaped section 57 and the tubular bag support 56. In doing so, the next bag on the bag roll 20 is pulled upward, and as the full bag exits the trash can 50 from the top, its top end is aligned with the tubular bag support 56 as a whole. Once the full bag is removed from the trash can 50, it is detached from the bag roll 20, and the next bag on the roll 20 is hooked onto the tubular bag support 56 in the manner shown in Figure 4. It should be understood that, in embodiments of the disposal unit 50 without the funnel-shaped section 57, the bag on the roll 20 is as follows, i.e., WB ≤ C S It is preferable to have an intermediate section 20B having a given unstretched lateral flattened bifold width WB represented as / 2. Therefore, the amount of waste per unit length of the tubular film can be maximized, for example, in the case of a given disposal unit 50 that does not have a funnel-shaped section 57.

[0069] Referring to Figure 6, another exemplary bag roll for the bag roll cassette 10 is shown as a whole by reference numeral 120. The characteristics of the tubular film described above, including different properties such as elasticity, elongation at break, and yield strength, can be said to apply similarly to the exemplary bag roll in Figure 6. As shown in the figure, the bag roll 120 is preferably wound around a cylinder 130 and then inserted into a cassette body, for example, the cassette body 40 in Figure 2. The bag roll 120 may also be provided with or without the cylinder 130 and / or the cassette body 40. The bag roll 120 is preferably made of a tubular film of a plastic material. For example, depending on the intended application, the plastic material may be plastic, such as polyethylene (LDPE, LLDPE, or HDPE), bioplastics, or polylactic acid, to name just a few of the many possible materials. Furthermore, it is conceivable that the plastic film may have additional functional layers, such as ethylene vinyl alcohol (EVOH) to form an odor or malodorous barrier, or a nylon layer to reinforce the bag. The film may also be made of biodegradable and / or compostable material, such as a starch-based or plant-based material.

[0070] As shown in the figures and as similarly described with reference to other embodiments, the bag roll 120 may be in the form of a tubular film of a certain length, having weld lines and perforation lines, etc., that define a plurality of bags that are butted together at both ends and connected to one another, indicated by reference numerals 120', 120'', etc. Each of the bags 120' may be usable on its own and may not be part of a series or roll of connected bags. The tubular film may have a zigzag pattern (fan) (Figure 7) It is preferable that the film is stacked on a roll in a state such as multiple folds. As a result, the bag roll 120 may appear to be a continuous sheet material as shown in Figure 6 due to the thinness of the film, however, the bag roll 120 has a pair of panels 121 that are overlapped and joined at the side edges 122. In one embodiment, this is called the flattened bi-fold state of the bag, that is, the bag has two folds, i.e., folds at each side edge 122 and gussets. There is no gusset provided. The side edge 122 may be a fold, since the bag can be made from a tubular film. In other words, the bag roll 120 may be a single continuous tubular film that is flattened and therefore forms the side edge 122. Thus, even when a pair of panels 121 are described, the boundary between the panels 121 may be a fold that forms the side edge 122. The bag of the bag roll 120 may have a gusset according to this disclosure, but the lateral dimensions of the bag can be described herein as being in a flattened-fold state. This may be interpreted as meaning that even if the bag roll 120 has a gusset, the dimensions are as if the bag were in a flattened-fold state, with respect to the lateral dimensions of the bag. Even if the bags described herein are not packaged or sold in a flattened-fold state, the flattened-fold state is a state in which the bag is laid flat on a surface and has two lateral folds—two side edges—between the top edge and the bottom edge.

[0071] Furthermore, the term "unstretched" is used to refer to a bag. This may be interpreted as meaning that the bag is in its initial state on the bag roll 120 before it may undergo some elastic or plastic deformation before the user places it on a disposal unit and before the user handles it. A bag in its initial state on the bag roll 120 may have been plastically pre-stretched during manufacturing, but despite such pre-stretching, these states on the bag roll 120 are said to be unstretched.

[0072] The side edges 122 of each bag extend from the top edge 123 to the bottom edge 124 of each bag, for example, bag 120' with a welded seam 125. In one embodiment, the side edges 122 are folds (i.e., resulting from the panel folding over itself), however, they may be welded seams. When joining the ends of the bag roll 120, the bags are connected to each other, and therefore the bottom edge 124 of the leading bag 120' is connected to the top edge 123 of the following bag 120'' in the bag roll 120, which is in contrast to bag rolls where the bottom or top edges of adjacent bags are connected to each other. To give the side edge 122 the shape described above, the weld seam 125 may be a continuous seam extending from one side edge 122 to the other to connect the panel 121 laterally, or it may have segments. This continuous seam 125 may include a portion that defines the closed bottom end of, for example, bags 120', 120''. In the embodiment shown in Figure 6, the closed bottom end of a bag 120', 120'' includes a double-seam portion 125' or segment. As shown, the double-seam portion 125' has two parallel seams extending laterally with respect to the length of the tubular film. Three or more seams may be provided, and as a result, a multi-seam portion with three or more seams can be envisioned at the closed bottom end in some embodiments.

[0073] As a variation, the bag may have separate weld seams 125, namely, weld seams for the side edges 122 and weld seams for the closed bottom edge. For simplicity, the expression “welded seams 125” is used in the plural form, but a single continuous seam 125 may be provided, for example, in a U-shape. The weld seam 125 can be understood as a weld seam segment of a continuous weld seam 125. The seam 125 is often made by any suitable welding or bonding method, such as thermal welding, and is therefore referred to as a weld seam in this specification, although other forms of joining methods, such as adhesive bonding, are also assumed. The weld seam 125 can also connect the panels 121 to each other and define the bottom edge 124, i.e., the closed bottom edge of the bag of the bag roll 120. The weld seam 125 can also extend to the top edge 123, however, in Figure 6, the weld seam 125 terminates at the wide top section 120A. In the embodiment shown in Figure 6, the straight segment 122A of the wide top section 120A is the two folds of the tubular film as described above for the flattened folded state, and the folds define the boundary between the panels 121. Thus, according to one embodiment, the weld seam 125 is periodically formed in the straight continuous tube—continuous tubular body—in the flattened folded state, and some portions of the film on the lateral outer side of the weld seam 125 are cut off, however these portions are shown as forming a flap 121A.

[0074] When laid flat, as in Figure 6, the bags of the bag roll 120 have a constant width. For example, the side edges 122 are parallel to each other along the entire length of the bag from the bag roll 120. However, because a welded seam 125 is provided, the internal dimensions of the bag decrease from the top edge 123 to the bottom edge 124, as described below. Outside the seam 125, the bag 120 has a flap 121A that does not form part of the interior of the bag in that a large object entering the bag 120 will not fit inside the flap 121A. The side edges 122 are shown as having a contour that is preferable in which each has a straight segment 122A adjacent to the top edge 123. In this case, the welded seam 125 has a tapered segment 122B, which may not be provided, another straight segment 122C, and / or another tapered segment 122D. The tapered segment 122D extends from the straight segment 122C to the bottom edge 124 of the bag. Segment 122D may be a straight line or a curved line and is tapered from top to bottom (i.e., its cross-sectional dimensions decrease). The expression “straight” is used for segment 122C, but the side edges may be tapered all the way from the widest part of the WC to the bottom edge 124. The expression “straight segment 122C” is used herein to distinguish purposes in a non-limiting manner. Thus, the bag may have four distinct compartments, namely, a wide top compartment 120A, a tapered compartment 120B, a main storage compartment 120C, and a narrow disposal compartment 120D, from top to bottom of the bag such as bag 120', or it may have a combination of fewer distinct compartments. In one embodiment, the bag lacks tapered sections 120B and / or straight segments 122C, thus transitioning directly from the wide top section 120A to the narrow disposal section 120D. The straight segments 122A are shown as being parallel to each other, but may be tapered toward the bottom edge 124. Similarly, the straight segments 122C are shown as being parallel to each other, but may be tapered toward the bottom edge 124.In yet another embodiment, the seam 125 defining the side edge 122 may taper continuously from the top edge 123 to the bottom edge 124 at a continuous angle or at two different angles, i.e., if section 120B or section 120C is not provided, at one angle for section 120A and at another angle for section 120D. In yet another embodiment, the bag 120' (whether part of the roll 120 or not) has straight segments 122A that are parallel or pseudo-parallel to each other and then taper beyond the wider top section 120A. For clarity, the widths described herein are, as stated above, the width of the roll bag in a flattened, folded state with the panels 121 located on the same plane. The wider top section 120A has a width WA greater than the width WC of the main storage section 120C, i.e., WA > WC. The widths WA and WC are preferably constant over most or all of sections 120A and 122C when segments 122A and 122C are parallel to each other as shown in Figure 6. If sections 122A and 122C taper toward the bottom edge 124, the wide top section 120A has a minimum width WA that is greater than the maximum width WC of the main storage section 120C. For example, the width ratio is as follows: i.e., 0.60WA ≤ WC ≤ 0.95WA. In another embodiment, the width ratio is as follows: i.e., 0.65WA ≤ WC ≤ 0.85WA. In one embodiment, segment 122A is parallel to each other, while segment 122C tapers toward the bottom edge 124 (and may be a mirror image of the other, in which case it may or may not be curvilinear (i.e., these segments may or may not be arc-shaped)). The minimum width WD of the narrow disposal section 120D is smaller than the width WC of the main storage section 120C, as follows: 0.50WC ≤ WD ≤ 0.98WC. In one embodiment, WA is equal to 30.0 cm ± 6.0 cm, and the length L is equal to 77.0 cm ± 20.0 cm.

[0075] A bag, for example, bag 120, has a length L that can be segmented as LA, LB, LC, and LD, representing the heights of sections 120A, 120B, 120C, and 120D, respectively. According to one embodiment, LC is at least twice the length of LA, i.e., LC > 2LA. According to another embodiment, which includes a tapered section 120B, LC is at least twice the combined length of LA and LB, i.e., LC > 2(LA + LB). LA is preferably divided into LA1 and LA2 when the top edge 123 defines a concave or convex shape as described above with reference to Figures 5B and 5C. LA2 is a portion of section 120A located below such concave or convex shape. According to one embodiment, LC is at least equal to the length of LD, i.e., LC = LD, but may be at least 10% longer, i.e., LC > 1.1LD, or even longer, according to, for example, the relation LC > 3LD. In one embodiment, to minimize the reduction in the opening diameter, the LD is 0.30L > LD > 0.15L. As the bag 120 is full when it comes out of the throat of the waste disposal device 10 as shown in the previous figure, the tapering of the bag 120 up to the bottom edge 124 makes it easy to remove the bag from the device 10.

[0076] The top edge 123 may have a different contour. In Figure 6, the contour of the top edge 123 is a straight segment. Other contours are also possible. With adjacent bags joined at the bottom and top as described above, the bags are connected end to end within the bag roll 120, so the bottom edge 124 has a shape complementary to the top edge 123. In other words, if the contour of the top edge 123 is a concave sine wave, the bottom edge 124 is a convex sine wave, and so on.

[0077] The perforated line 126 is located at the junction of the bottom edge 124 of the first bag, i.e., the leading bag, for example, bag 120', and the top edge 123 of the next bag in the bag roll 120, i.e., the succeeding bag, for example, bag 120''. The perforated line 126 is preferably composed of a series of spaced holes along a contour that mimics the contours of the bottom edge 124 and the top edge 123. The perforated line 126 is located adjacent to the weld seam 125, which forms a weakened portion of the bag roll 120, thereby separating one of the bags as a result of a tearing action. In one embodiment, the perforated line 126 and the notches on the side of the weld seam 125 are made by punching.

[0078] It is noted that the bag roll cassette 10 and / or bag rolls 20, 120 can be used in any other disposal unit, with or without the same components as the disposal unit 50 in Figures 3 and 4. The disposal unit 50 is provided as an exemplary waste container configuration used with the bag roll cassette 10 and / or bag rolls 20, 120, but variations of the disposal unit 50 can also be used in conjunction with the bag roll cassette 10 and / or bag rolls 20, 120.

Claims

1. It is a bag, It has a tubular body with an open top end and a closed bottom end, The tubular body has a first section adjacent to the open top end and at least a second section adjacent to the closed bottom end, the first section is made of a material having different elasticity than the material of the second section, and the first section has higher elasticity than the second section. The tubular body, when flattened and folded in half, has a pair of side edges extending from the top edge to the bottom edge, with one fold at each side edge, the top edge defining the opening top end, and the bottom edge defining the closed bottom end, a bag.

2. It is a bag, It has a tubular body with an open top end and a closed bottom end, The tubular body has a first section adjacent to the open top end and at least a second section adjacent to the closed bottom end, and surface feature portions are provided only within the first section such that the first section has higher elasticity than the second section, and the surface feature portions are defined in the first section by a surface pattern consisting of an embossed area, a pre-stretched area, or a deformed area of ​​the tubular film, The tubular body, when flattened and folded in half, has a pair of side edges extending from the top edge to the bottom edge, with one fold at each side edge, the top edge defining the opening top end, and the bottom edge defining the closed bottom end, a bag.

3. It is a bag, It has a tubular body with an open top end and a closed bottom end, The tubular body has a first section adjacent to the open top end and at least a second section adjacent to the closed bottom end, the first section has folds formed in the material of the tubular body, the folds are located only within the first section from the open top end of the tubular body, and the first section is more elastic than the second section. The tubular body, when flattened and folded in half, has a pair of side edges extending from the top edge to the bottom edge, with one fold at each side edge, the top edge defining the opening top end, and the bottom edge defining the closed bottom end, a bag.

4. The bag according to claim 2, wherein the surface feature portion is defined by a surface pattern including an array of depressions formed in the first section of the tubular body.

5. The bag according to claim 2, wherein the surface feature portion includes one of a circular depression, a diamond-shaped depression, and a honeycomb-shaped depression.

6. The bag according to claim 2, wherein the surface feature portion includes a line extending around at least one embossed region separated from each other by a non-embossed region.

7. The bag according to claim 2, wherein the surface feature portion includes pleats extending in the direction from the opening top end toward the closed bottom end.

8. The bag according to claim 2, wherein the surface feature portion includes pleats that do not extend within the second section but extend from the opening apex along the entire length of the first section.

9. The bag according to claim 2, wherein the surface feature portion includes pleats and gap spaces inherent to the pleats that define the pattern of adjacent thin and thick regions of the first division of the tubular body.

10. The bag according to claim 2, wherein the surface feature portion extends over the entire surface of the first section of the tubular body.

11. The bag according to claim 3, wherein the pleats do not extend within the second section but extend from the opening apex along the entire length of the first section.

12. The bag according to claim 11, wherein the pleats are formed on the entire surface of the first section of the tubular body.

13. The bag according to any one of claims 1 to 12, wherein the first section of the tubular body has a breaking point elongation greater than the breaking point elongation of the second section of the tubular body.

14. The bag according to any one of claims 1 to 12, wherein the first section of the tubular body has a breaking point elongation of 105% to 200% of the breaking point elongation of the second section of the tubular body.

15. The bag according to any one of claims 1 to 14, wherein the first section of the tubular body has a yield strength less than that of the second section of the tubular body.

16. The bag according to any one of claims 1 to 14, wherein the first section of the tubular body has a yield strength of 50% to 95% of the yield strength of the second section of the tubular body.

17. The bag according to any one of claims 1 to 16, wherein the first section of the tubular body has a modulus of elasticity smaller than that of the second section of the tubular body.

18. The bag according to any one of claims 1 to 17, wherein the first division is a top division, the second division is an intermediate division, the tubular body further has a bottom division defining the closed bottom end, the top division has a length LA, the intermediate division has a length LB, the bottom division has a length LC, and the length LA is smaller than LB + LC.

19. The bag according to any one of claims 1 to 17, wherein the first section has a length LA extending from the opening top end, the second section extends from the first section to the closed bottom end, the second section has a length LB, and the length LA is 5% to 20% of the length LB.

20. The bag according to any one of claims 1 to 17, wherein the first section has a length LA extending from the opening top end, the second section extends from the first section to the closed bottom end, the second section has a length LB, and the length LA is 5% to 10% of the length LB.

21. The bag according to any one of claims 1 to 17, wherein the first section has a length LA extending from the opening top end, the second section extends from the first section to the closed bottom end, the second section has a length LB, and the length LA is less than one-third of the length LB.

22. It is a roll of bags, A bag roll comprising a plurality of the bags described in any one of claims 1 to 21, wherein the bags are connected with their ends butted together, and the roll is connected from the bottom edge of the first bag in the bag roll to the top edge of the second bag in the bag roll.

23. A bag dispensing cassette comprising a bag roll and a container enclosing at least a portion of the bag roll as described in claim 22.

24. A bag dispensing cassette comprising a tubular film constituting a plurality of bags according to any one of claims 1 to 21, and a container surrounding at least a portion of the plurality of bags, wherein the plurality of bags are connected with their ends butted together and connected from the bottom edge of the first bag to the top edge of the second bag, and the tubular film is stored in a fan-like or multi-folded form.

25. The bag according to claim 1, wherein the material of the first section is LLDPE and the material of the second section includes HDPE.

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