SI9620024A - Dispensing system with keyed guide slot for sheet rolls - Google Patents

Abstract

A dispenser (100), a flexible sheet material roll (12), and a dispensing system for dispensing flexible material from the sheet material rolls. The system includes a rolled products dispenser and sheet material rolls. The dispenser includes opposing lateral side wall surfaces (104, 114), and a guide track (110, 111) located in each of the lateral side wall surfaces. At least one of the two guide tracks includes an elongated guide projection (124). Each sheet material roll includes flexible sheet material wound around a hollow centre core having first and second ends, and first (118) and second (119) end caps positioned in respective ends of the hollow centre core (116). Both end caps have an inwardly projecting portion located side the hollow centre core, and an outwardly projecting cylindrical spindle (120, 121) extending outwardly past their respective end of the hollow centre core. The spindles guide the roll within the guide tracks of the dispenser. The spindle of one of the end caps includes at least one annular groove (126) in its circumference which interfaces with the elongated guide projection of the guide track, to provide a system where the roll is keyed to fit the dispenser. This assures proper orientation of the rolls in the dispenser, and provides an arrangement for coordinating the quality of the rolls being dispensed from specific dispensers.

Description

FIELD OF THE INVENTION

The present invention relates to a dispenser ™ system, which includes a dispenser for dispensing sheet material from rolls and a roll of flexible sheet material with an encrypted system for guiding it. More specifically, the present invention relates to a dispenser system, dispenser and rolls of flexible sheet material, for example, rolls of toilet paper, which ensures the correct orientation of the rolls into the dispenser and provides an arrangement for coordinating the quality of rolls dispensed from specific dispensers.

BACKGROUND OF THE INVENTION

The present invention relates to rolls of flexible sheet material, e.g. rolls of toilet paper, and storing and dispensing curled flexible sheet material. Usually toilet paper dispensers are often of a certain size and adapted to hold and distribute multiple rolls of toilet paper. Typical dispensers of this type are typically designed so that the rolls of toilet paper can be arranged inside the dispenser housing, keeping at least one roll in the upper spare position while the lower roll is in the dispensing position. The rolls of toilet paper have a hollow elongated inner part or a sleeve with end plugs located at both ends of the hollow sleeve. The end studs include cylindrical projections extending outwards, extending beyond the ends of the rolls. The divider includes spaced leading paths in opposite lateral wall surfaces. When the roll rotates about its center axis,

-2 As it is distributed and when the roll travels from the upper spare position to the lower distribution position when the roll is emptied and / or removed, each of the guide paths protrudes from the individual end plug.

The general problem with these dispensers is that administrators or other operators are investing new rolls of toilet paper in the dispenser incorrectly turned, that is 180 °. This makes the distribution of the rolls more difficult and / or impossible because the leading edge of the sheet material does not extend out from the front of the distributor.

In attempting to overcome this problem, previous dispensers used guideways of different widths and rolls, which had end studs with projections of different diameters that generally matched the different widths of guideways. Thus, the dispenser would include a narrow guide path, that is, the right guide path and a wide guide path, while the rolls would be provided with a smaller diameter protrusion, that is, a right protrusion and a larger diameter protrusion. The possibility that the roll inserted by the caretaker into the dispenser is correctly increased only when the larger or protruding left end pin easily fits into the larger or left leading path. However, there are at least two disadvantages that are related to this arrangement.

First, many caretakers, who may rush or may otherwise be careless, can force incorrectly inverted alternate toilet rolls in the guideway when loading rolls into the dispenser. This can result in squeezing a lower roll that is in the distribution position, which prevents it from being split and / or squeezing the upper spare roll, which prevents it from falling down into the distribution position. Further, this arrangement does not provide a system for coordinating the quality of rolls for use with specific dispensers.

-3 Additionally, color coded and written instructions may be provided on the toilet paper roll cover to help the administrator determine the correct orientation of the roll. However, caregivers who rush or be careless when dependent on toilet lighting or the caregiver's literacy to read instructions, which may also be written in different languages, may overlook these visual cues.

SUMMARY OF THE INVENTION

The invention relates to a dispenser and end cap system for flexible material rolls and flexible sheet material rolls, which ensures the correct orientation of the rolls into the dispenser and provides an arrangement for coordinating the quality of rolls dispensed from specific dispensers.

In one embodiment, the dispenser is intended for dispensing flexible sheet material from rolls having projecting end members, one of which has a annular groove. The dispenser includes a first and a second opposite lateral sidewall, with each lateral sidewall having a corresponding guideway to guide each individual projecting end portion of the roll with sheet material. The leading path of the first lateral lateral wall includes an extended guide projection of such size and shape that it fits properly into the annular groove of one projecting end portion.

The present invention is also directed to a dispensing system for dispensing flexible material from rolled sheet material. The system includes a distributor of rolled-up products and rolls of sheet material. The manifold includes the first and second opposite lateral side walls, z

-4Each lateral side wall having an appropriate leading path. The leading path of the first lateral lateral wall includes an extended projection. The roll of sheet material includes a flexible sheet material wound around a hollow sleeve. The sleeve has a first and a second end and a roll guide structure, which is partly housed inside the hollow roll sleeve and extends from both ends of the hollow roll guide sleeve with leaf material in opposite guideways of the dispenser into the roll of coiled product. The roll guidance structure includes a first outwardly projecting cylindrical portion extending outwardly over the first end of the hollow roll sleeve and a second outwardly projecting cylindrical portion extending outwardly over the second end of the hollow roller sleeve. The first projecting projection includes at least one annular groove located in its circumference. When the roll of leaf material is inserted into the dispenser, the guide paths are guided by each individually projecting cylindrical portion of the roll with leaf material. The annular groove cooperates with the leading projection.

The present invention also provides a roll of sheet material intended for use in a roller coiled product dispenser having an opposite leading path and a leading projection in one of the leading paths. The roll of sheet material includes a flexible sheet material wound around a hollow sleeve having a first and a second end and a structure for guiding the roll. The roll guide structure is mounted partially inside the hollow roll sleeve and extends outward from the two, first and second ends of the hollow roll sleeve to guide the sheet material in opposite guideways of the dispenser into the roll coiled product. The roll guidance means include a first outwardly projecting cylindrical portion extending outwardly over the first end of the hollow roll sleeve and a second outwardly projecting cylindrical portion extending outwardly over the second end of the hollow roller sleeve. The first and second outward projections allow the roll to be guided within opposite leading paths of the dispenser into the roll of coiled products. First out

The projecting portion includes at least one annular groove located in its circumference cooperating with the guide projection.

The invention also relates to a roll of sheet material intended for use in a dispenser in a roll-wrapped product having an opposite leading path and a leading projection in one of the distributor leading paths. The roll of sheet material includes a first end plug, a second end plug and a roll of flexible sheet material wound around a hollow center sleeve having a first and a second end. The first end plug is located at the first end of the hollow center sleeve and the second end plug is located at the other end of the hollow center sleeve. Both end plugs include an inwardly convex part located inside the hollow center sleeve and an outwardly projecting cylindrical portion extending outwardly over the individual ends of the hollow center sleeve. Outwardly projecting cylindrical parts allow the roll to be guided within opposite leading paths of the dispenser into roll-coiled products. The cylindrical portion of the first end plug extending outwards has at least one annular groove in its circumference cooperating with the guide projection. The stopping edge serves as a straightening device for aligning the annular groove with respect to the first end of the hollow roll sleeve, for adjusting the groove with an extended guide projection when the roll with sheet material is inserted into the dispenser.

The present invention provides a dispenser, a roll of sheet material, and a dispensing system that facilitates the problems discussed above for previously known dispensers, rolls, and dispensing systems. The distributor and the spindles in rolls of sheet material are encrypted, which reduces the possibility of incorrectly inverted rolls being inserted into the distributor. Further, the encrypted arrangement provides a system for coordinating the quality of rolls distributed from the distributors.

-6 Further advantageous features and advantages of the present invention will be apparent from the following detailed descriptions given as an example of a preferred embodiment illustrated by reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a top-right isometric view of one end, e.g., the right end of a dispenser and a roll of toilet paper of the present invention, showing an intermediate surface between the end plug of the roll and the dispenser guide path;

Figure 2 is a cross-sectional view of a roll of toilet paper with end plugs shown in Figure 1 made through the center of the roll for use in the dispensing apparatus shown in Figure 1;

3 is an enlarged cross-sectional view of the encrypted end plug of FIGS. 1 and 2 for use in the dispensing apparatus shown in FIG. 1;

Figure 4 is a perspective view showing a dispenser housing with a conventional dispenser cap removed, which includes the features illustrated in Figure 1 and suitably described below;

Figure 5 is a partial view of the dispenser shown in Figure 4, showing a roll entering the upper end of the housing with parts in the distribution position and ready to receive the roll;

6 is a partial view of the distributor shown in FIG. 4 showing a cross-section in the distribution position and a reserve roll held in the position for

-7 a reserve roll, the rolls include the features illustrated in Figures 1-3 and described accordingly below;

Figure 7 is a partial view of the dispenser shown in Figure 4, is similar to Figure 6 and shows an empty hollow roll sleeve in the distribution position and indicates the forces that cause the hollow sleeve to be removed by physical deformation;

8 is a partial view of the dispenser shown in FIG. 4 showing a full roll in the dispensing position having the features illustrated in FIGS. 1-3 and described accordingly below; FIG.

Fig. 9 is a partial view showing a modified, rapidly deformable hollow sleeve shape illustrated in Fig. 7, and incorporating the features illustrated in Figures 1-3 and described accordingly below; and

Figure 10 is a partial view showing another modified shape of a rapidly deformable hollow sleeve illustrated in Figure 7 and incorporating the features illustrated in Figures 1-3 and suitably described below.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

1-3 show the dispenser and end cap system of the present invention. The manifold and the end cap system comprise one pair of guide paths; in the roll manifold 5, Figure 1 shows only the right leading path 10, which receives one or more rolls 12 of flexible sheet material, e.g., toilet paper. The guideways 10 are preferably positioned inside opposite lateral wall surfaces 14 of the dispenser 5 and preferably include the spaced front and rear sides of the wall surfaces 10a and 10b defining the width of the guideway 10 and inwards

-8turned lateral wall surface 10c defining the length of the guide path 10. In a preferred dispenser shape, such as the dispenser shown in Figures 4-8, the guideways are generally oriented vertically, which allows the dispenser to have a lower paper roll in a lower dispensing position for immediate distribution, and the top roll of paper in the reserve position, and allows the distributor to move the roll from the upper reserve position to the lower distribution position.

As illustrated in FIGS. 1 and 2, each roll 12 has a hollow sleeve 16 with end plugs 18, 19 inserted therein. Each end plug 18 and 19 includes a cylindrically projecting, outwardly projecting portion 20 and 21, that is, a spindle extending beyond each side. ends 22 and 23 of roll 12. Spindles 20 and 21 interfere with and are guided within the individual guide path 10 in the dispenser. Further, depending on the desired dispenser used, the hollow sleeve 16 may be shaped so as to be rapidly deformed or otherwise brittle to assist in its removal from the dispenser. In order to achieve this characteristic, the sleeve 16 is preferably made of lightweight paperboard, as shown in Figure 9 in the form of a sleeve, as shown in cross section in Figure 6, in which the sleeve is cut or otherwise weakened between its ends, or is made in the form of a split sleeve. U.S. patent no. 4,522,346 Jespersen discloses the use of split sleeves, while U.S. Pat. patent no. No. 4,671,466 to Jespersen et al. Discloses the use of notched or weakened deformable sleeves. Patents 4,522,346 and 4,671,466 are both incorporated herein by reference.

In order to facilitate the precise orientation of the roll 12 in the dispenser, the opposite leading paths preferably have widths of different sizes. Accordingly, the end studs 18 and 19 of the roll 12 also have spindles 20 and 21 with diameters of different sizes. For example, spindle 20 of end plug 18 has a smaller diameter than spindle 21,

-9 end pin 19. Similarly, the guide path 10 is narrower than its opposite groove guide, which is not shown in Figure 1. The groove 10 is also narrower than the diameter of the spindle 21, so that the spindle 21 cannot normally fit into the groove 10. The paper roll 12 is delivered for insertion into the dispenser with end plugs inserted into its right end of the sleeve. Usually, the caretaker will insert the roll 12 in the dispenser so that it is correctly rotated, that is, with a narrow spindle 20 in a narrow groove, because the roll 12 will not fit in the dispenser in the opposite direction unless it is incorrectly pushed.

In order to reduce the possibility of the caretaker inserting an incorrectly inverted roll by force, and to achieve other advantages as described herein, at least one of the guideways and one of the spindles are "encrypted". The encrypted feature is partially ensured by incorporating a guide projection strip 24 on at least one front and rear side wall surfaces 10a and 10b of the guideways, e.g., the guideway 10, and is partially provided by a U-shaped annular groove 26 located in the circumference of the corresponding spindle, e.g., spindle 20. In a preferred embodiment, the convex strip 24 is disposed in a narrow guideway 10 and the annular groove 26 is mounted in a narrow spindle 20. The guide groove 24 is similarly shaped and of a slightly smaller size than the annular groove 26 , that is, they are very complementary in that they provide an arrangement where the spindle 20 cooperates with the guide path 10. It is permissible that while the groove 26 has the preferred U-shape, groove 26 may have one of many other desired shapes, e.g. it may be formed in the shape of a letter V. Further, depending on the shape of the dispenser and the preferences of the user, the guide strip 24 may extend from the top of the guide path 10 to the bottom of the guide path 10, or it may be long enough to prevent the roll being unencrypted the end plug.

-10As shown in Figures 2 and 3, each end plug 18 and 19 includes an insertion part 28 and 29 for insertion into a hollow sleeve 16 of roll 12. The insertion portions of the roll sleeve 28 and 29 of both end plugs 18 and 19 are functionally identical and thus only the insertion portion 28 is described herein. As better illustrated in FIG. 3, the insertion portion of the roll sleeve 28 preferably includes an annular guide edge 30, a conical centering portion 32 and an annular outer wall 34. The leading edge 30 and the centering portion 32 facilitate the insertion of the final of the plug 18 into the sleeve 16, providing an inherent support structure in which the space tolerances are absorbed by the tapered centering portion 32 which pushes against the inner surface of the hollow roll sleeve

16. The insertion of each end plug 18 and 19 into the sleeve 16 may be continued until the stop edge 36 mounted at the end of the outer wall 34 rests on the end 22 of the roll 12. After complete insertion of part 28, the outer wall 34 fits well inside the inner walls of the hollow sleeve 16. The stop edge 36 provides true tolerances between the groove 26 and the roll 12 and therefore also provides the desired tolerances between the spindle 20 and the groove 10, especially when matching the groove 26 to the projection 24. The stopping edge 36 thus acts as a leveling device, which provides a true predetermined distance of the groove 26 from the edge of the roll so that it is aligned with the projection 24.

The end cap 18 is preferably made of plastic with any suitable design technique. For example, the end plug 18 is loosely molded by injection and the groove 26 may be formed in the molding process or in a secondary process by any technique, including a molding jaw driven by a hydraulic cylinder.

One advantage of the convex lane 24 is that it further limits the width of the guideway 10. This makes it more difficult for the administrator to insert incorrectly

-11turned roll. Further, when an administrator finds it more difficult to insert a roll with an “unencrypted” or incorrectly encrypted end plug, he or she is more likely to notice the problem and insert the roll only in the correct direction and with a properly encrypted end plug. Further, these encrypted features, e.g., groove 26 and lane 24, help to provide an inherently visible indicator to reduce the possibility that the caretaker will attempt to insert an incorrectly inverted roll. The groove 26 can be felt by the caretaker and therefore also serves as a tangible indicator to reduce the possibility that the caretaker will incorrectly insert the roll.

Another advantage achieved by the encrypted features is that the lateral movement of the rolls 12 is inherently limited by the connecting and guiding relationship between the convex strip 24 and the groove 26. When the lateral movement of the roll 12 is limited by the belt 24 of the guide groove 26 there will be more force that is in a roll-oriented distribution process by pulling the free end of the sheet material into a smooth rotational motion. Further, the lateral alignment of the rolls 12, with respect to the guide paths 10, is achieved without the need to rely on the inwardly facing lateral wall surface 10c of the guide paths 10, which laterally retain the ends of the spindles 20 and 21.

Further, while Figures 2 and 3 show only one pair of convex strip 24 and groove 26, more than one pair of convex strip 24 and groove may be used

26. Alternatively, or in addition, by varying the number of pairs of lane 24 and groove 26, the spacing of pairs of lane 24 and groove 26 may be varied with respect to the roll 12. This provides additional combinations of roll and distributor encryption and increases the required feature that Only properly “encrypted” rolls are inserted into the encrypted distributors.

This feature helps to provide an arrangement for coordinating the quality of rolls distributed from predefined distributors. For example, toilets

-12Paper can be made according to two separate degrees of softness, e.g., types A and B, with type A being softer. The company can manufacture and ship rolls with properly "coded" or "encrypted" protruding parts of end cap 20 appropriate to their type. Also, the distributors would be properly coded ”or“ encrypted ”by the number and / or spacing of the convex strips 24 so that only rolls 12 with a predetermined minimum degree of softness were received. We think that on the specific floor of the building, it is desirable to have distributors that distribute paper of superior quality, i.e. type A. Paper of type B would not fit into the dispenser because either the number or spacing of the grooves is 26 in. end pin 18 would not match the encrypted pattern of the tape or strips 24 in the lead path 10. Similarly, this arrangement saves money by also ensuring that more expensive Type A paper is not used in the dispenser where the appropriate paper is specified type B.

In addition to exclusive encryption arrangements, that is, only one-to-one, the encrypted arrangement can provide a system where dispensers are designed only to allow rolls having a minimum of a certain degree of softness to be used. For example, type B paper could have one end stud with one groove, while type A paper could include one end stud with two grooves. Top quality paper dispenser would be designed with two guide convex ribbons 24 and would accept only rolls with end plug encoded for type A paper. A lower quality paper dispenser, i.e. type B paper or better, would include only one leading convex strip 24, and receiving rolls with end plug encoded for, or either type A or type B paper, because the additional groove in the end plug of type A paper would not affect the roll being placed in the dispenser. Therefore, this encrypted feature reduces insertion incorrectly

-13 rolled rolls and ensures that specific paper feeders distribute only paper with a minimum degree of softness.

Further encrypted features provide a system that prevents fake or unwanted rolls from being inserted into the encrypted distributor. For example, if the user of an unencrypted distributor is satisfied with the quality of the roll of sheet material of a specific manufacturer and wants rolls only from that manufacturer, then the user will need to constantly supervise the purchase and installation of rolls by maintenance personnel to ensure that the rolls originate from the desired manufacturer. However, if the distributor is encrypted to have one or more protruding strips, the specific encryption may be coordinated with the desired manufacturer to provide rolls with spindles that are specifically encrypted to fit the shape of the distributor. Any attempt by the maintainers to install unauthorized rolls, that is, improperly encrypted rolls from other manufacturers, would be prevented because unauthorized rolls could not fit into the encrypted distributor.

The encrypted feature of the present invention also allows the end plugs, for use at opposite ends of the roll, to have projections of the same size and still achieve proper orientation by different encryption of one end plug. This can have advantages in fabrication because it allows both end studs to be made from the same initial mold.

It is further apparent that instead of two inserted end members, only one inserted member with guide spindles extending from its opposite ends could be used. In such an arrangement, the outwardly extending spindles would be preferentially similar or shaped as the spindles 20 and 21 of the end studs 18 and 19.

-14 As previously described, the features described in FIGS. 1-3 are preferably incorporated into a dispenser shape in which the guideways are generally vertically oriented, allowing the dispenser to place a lower paper roll in a lower dispensing position for immediate dispensing and the upper roll paper in the backup position, and allows the dispenser to move the roll from the top position to the bottom position. An example of such a dispenser, without many of the features of FIGS. 1-3, e.g., encrypted features including a leading convex strip and a groove, is described in U.S. Pat. patent no. No. 4,671,466 to Jespersen et al., Incorporated herein by reference.

Figures 4-9 illustrate the dispenser and end cap system for rolls of coiled flexible sheet material and include features of the present invention as illustrated in Figures 1-3 and as described above. When describing the distributor 100 as shown in the drawings and in particular in Figure 4, it should be noted that in order to more easily illustrate the structural features of this embodiment, the distributor cover which would normally be provided is not shown in the drawings. To illustrate how a conventional cover that completes a distributor cabinet can be rotatably mounted relative to a housing 102 that forms a pedestal for the distributor work components, we can take the U.S. patent no. 3,437,388 to Jespersen, which is incorporated herein by reference.

According to Figure 4, when describing the distributor 100, the housing 102 provides a first side wall 104, a second side wall 114, and a rear wall 108. It will be understood that when using the distributor 100, the housing 102 which forms the base for the working components of the distributor is provided to the wall mounted at the desired location for use by the distributor. Thus, the rear wall 108 of the housing 102 will be provided with suitable openings that are not

-15shown for mounting brackets to be used to secure the distributor 100 to the desired location on the wall.

As mentioned above, a conventional cover which, together with housing 102, completes the distributor cabinet is not shown. The side walls 104 and 114 are provided with aligned holes 109 which serve as central points for mounting the distributor cover.

The side wall 104 of the housing 102 is provided with an inward-facing channel or guide path 111. Also, the opposite side wall 114 is provided with an inward-facing channel or guide path 110. This pair of inward-facing, opposite guide paths 110 and 111 serves to guide the spindles , which form part of the roll sleeve, serve them where they project from opposite ends of the roll when the rolls are loaded into the dispenser 100, as supports of the roll sleeve.

Preferably, channels 111 and 110 are of different widths for mounting spindles of different diameters, forming the roll coil supports for rolls loaded into the dispenser 100. These two differently wide channels correspond to different diameters of roll spindle support spindles to provide the correct direction. unrolling and guiding the roll when loading the rolls into the dispenser 100. Each of the channels of the leading paths 111 and 110 in the side walls 104 and 114 of the housing 102 is provided at its lower end with a saddle member, this article is numbered 146 at the bottom of the channel 111, and at the lower end of the channel 110 is numbered 148. The bottom of the housing 102 is open at 150, so that the roll 112, which is held in the position of the roll distribution, at the bottom of the distributor 100 extends down through the open bottom 150, as shown in Figures 6 and 8 for the sheet material on the roll 112 to be accessible from the dispenser 100 to the intended user.

-16According to Figure 6, the composition of the roll 112 may be described as an illustration of the type of roll of flexible sheet material intended for dispensing into the dispenser 100 of the present invention. Thus, the roll 112 has a flexible sheet material wrapped around a tubular hollow roll sleeve 116. In the shape of the roll sleeve illustrated in Figures 6 and 7, the sleeve 116 is made so that it can be deformed quickly by having a series of spaced circumferential notches 130 formed between between the ends of the sleeve. It will be understood that other techniques can be used to weaken the sleeve and make it so that after the sheet material which was initially wound on the sleeve is easily deformed.

Another form of hollow sleeve that can be deformed rapidly 116 'is illustrated in Figure 9. The sleeve 116' is formed from a lightweight material such that the forces directed to the sleeve as described below are sufficient to physically deform the sleeve to enable easy removal of the hollow sleeve. , without the need for notches 130 to weaken the sleeve, as shown in the sleeves in Figures 6 and 7, which can be deformed rapidly. In Figure 10, the sleeve 116 is illustrated in the form of a split sleeve 116 ''. The empty sleeve of this type is removed from the manifold by splitting it.

In the form of an illustrated roll sleeve, the supports for either the sleeve 116, 116 'or 116' are provided by an end plug 119 having a spindle 121 inserted into one outer end of a tubular hollow sleeve and an end plug 118 having a spindle 120 inserted into a tubular hollow sleeve at the opposite outer end. It will be seen from Figure 6 that the thrust support spindle 121, end plug 119 is taken up by the saddle member 146 at the bottom of the channel 111 and the thrust support spindle 120 of the end plug 118 takes over the saddle member 148 at the bottom of the channel 110, supporting the roll 112 in the roll distribution position

-17 inside the dispenser housing 102. When so supported, the toilet paper roll 112 extends down through the open bottom 150 of the dispenser housing 102.

In order to minimize the possibility of the caretaker forcing an incorrectly inverted roll and to provide other advantages, including those described above, at least one of the leading paths and one of the spindles are "encrypted". The encrypted feature is partially ensured by incorporating a guide convex strip 124 in at least one of the guideways, e.g., guideway 110 and partly provided by a ring groove 126 shaped like a letter U located around the circumference of its corresponding spindle 120. The guideways 110 include spaced front and back sides of wall surfaces 110a and 11 Ob defining width of guideways 110 and inwardly facing lateral wall surface 110c. In a preferred embodiment, the convex ribbon 124 is arranged in a narrow guide path 110 along either the front or rear of the wall surface 110a or 11 Ob, and the annular groove 126 is mounted in a narrow spindle 120. The guide convex ribbon 124 is similarly shaped and only slightly smaller in size. as the annular groove 126 to provide a complementary arrangement where the spindle 120 cooperates with the guide path 110. It is permissible that while the groove 126 has the preferred U-shape, the groove 126 may have one of many other desired shapes, e.g., it may be shaped V. Further, guide bar 124 is illustrated as extending from the top of guide track 110 to a position immediately adjacent to the roll in a reserve or storage position. However, it is allowed that the guide bar 124 may extend further down the guide track 110 or may be just long enough to prevent the roll from being inserted with a spindle that is not properly encrypted.

As illustrated in the drawings, the open bottom 150 is defined within the side walls 104 and 114 and the rear wall 108 of the housing 102, these walls being

-18 extend downwards under saddle members 146 and 148. Generally with the distributor cover installed, the cover in conjunction with housing 102 can have the light configuration shown in U.S. Pat. patent no. 3,437,388 discussed above. With this configuration, the toilet paper material on the roll 112 is exposed through the open bottom 150 of the dispenser 100. It will be understood that the roll 113, partly shown in Figures 6 and 7, when held in the position of the spare roll inside the housing 102, would have similar a building as described above with reference to roll structure 112.

The drive control for the distributor 100, as well as between the two rolls 112 and 113 loaded into the housing 102 is provided with a control lever 160. The lever 160 is pivotally mounted in the channel 111 of the side wall 104 on the hinge pin 162. This rotary mounting allows the pin to go 162 simply through the side walls of channel 111, thereby affecting the desired mounting of control lever 160.

The lever 160 has a lower end for sensing 164, which serves to detect the presence of the roll sleeve 116. As will be explained by reference to Figure 7, this lower end also directs the axial force F _L to the upper part of the hollow roll sleeve 116. To detect the roll sleeve , such as the roll sleeve 112, as shown in Figure 6, occurs when this first roll is held in the distribution position within the housing 102. The upper support end 166 on the pivotally mounted lever 160 serves to hold the second roll 113 in the reserve roll position inside the housing 102, just as the roll 113 is also shown in Figure 6.

The leaf spring 168, which can be riveted at 170 to the outer wall of the channel 111, serves to tilt the control lever 160 toward the position shown in Figure 5. The force that causes the spring 168 to tilt thus forces the end

-19for detecting lever 160 160 against the roll distribution position within the housing 102. Therefore, this force also forces the support end 166 of the lever 160 away from the spare roll position within the housing 102, and directs the force F _L to the upper part of one end of the hollow sleeve 116.

The upper support end of the control lever 160 is configured in the shown embodiment with an inverted knee to provide a surface 176 that is inclined inwardly relative to the plane of the first side wall 104 of the housing 102. This inclined surface 176 physically holds the support spindle 121 of the roll sleeve, as shown in Figures 6 and 7 with reference to the roll 113 held in the position of the spare roll within the housing 102 of the distributor 100.

As will be seen from the illustrations in these figures, the inclination of the surface 176 on the upper support end 166 of the lever 160 inward tends to utilize the weight of the roll 113 acting down on the spindle resting on the inclined surface 176 by tending to press the lever 160 and its the upper support end 166 out of the blocked path 111. Thus, the weight of the roll 113 supports the operation of the lower end 164 of the lever 160 when pressed outward, towards the upper end of the end of the sleeve 116, and thus provides an added directing force against the sleeve 116, which tends to cause the sleeve to be deformed rapidly thereafter. when the roll of paper material was consumed, bent.

The second side wall 114 of the housing 102 is provided with a spring-tilted latch 180, which can be riveted at 182 to the outer wall of the channel 110 so that this latch 180 lies inside the channel 110. The spring-tilted latch 180 has its lower end 184 positioned above saddle member 148 at the bottom of duct 110. Thus, it is spaced sufficiently above such saddle member that the spindle 120 of the end plug 118 in the hollow sleeve

-20116, is free to rely on the saddle member 148 under the end 184 of the snap latch 180, as shown in Figures 6 and 7.

As the spindle 120 of the end plug 118 moves down, along the channel of the guide latch 110, the spindle 120 will act as long as it presses the latch 180 until it moves below the end of the latch 184. In this position, there is a reverse motion along the guide path 110 is blocked by a snap latch 180. This blocking action is to prevent the right end of the roll 112, as seen in FIG. 6, from being raised up inside the dispenser housing 102 to prevent the roll of toilet paper from being wholly or partially consumed. distributor 100. The left end of the roll 112 is also protected from being raised back up inside the channel 111, with the lower end for detecting 164 of the lever 160 lying above the spindle 121 on the end pin 119.

The second side wall 114 of the housing 102 is also provided with an inclined leaf spring 190. This spring may have its upper part suitably riveted at 192 to the side wall 114. The spring 190 is positioned next to the roll distribution position inside the housing 102 so that it protrudes inward and executes two function. Initially, when the roll 112 is full as shown in Fig. 6, the spring 190 directs the friction resistance to one side end of the roll, which is held in the distribution position. This function of the spring 190 functions to reduce the speed of rotation of the roll 112 or the rolls exposed in the distribution position so that the roll does not rotate or rotate freely when a sheet material such as toilet paper is pulled out of the dispenser 100. The mouth spring 190 directs axially force against the upper part of one end of the hollow roll sleeve 116, this force is identified in FIG. 7 as F _R.

-21Now we can explain the operation of the distributor 100 as described above. In Figure 4, the distributor housing 102 is shown in a state where the dispenser is empty or unloaded. For the roll 112 to be loaded into the distributor 100, the cover not shown is open and the roll is lowered into the distributor 100, with opposite spindles 120 and 121 in alignment with each opposite leading path 110 and 111. If the roll 112 is correctly turned and properly encrypted , that is, the roll having a spindle 120 with a groove 126 that corresponds appropriately to the protrusion of the guide bar 124 in the groove 110, the encoded groove 126 and the convex strap 124 on the spindle 120 and the leading path 110 will match. Thus, when the roll 112 is lowered, it falls down into the distribution position at the lower end of the housing 102 with the support spindles of its sleeve in a guide manner included with the channel paths 111 and 110. The boundary surface between the groove 126 and the leading convex strip 124 restricts unwanted lateral movement of the roll 112 and supports better lateral alignment of the roll 112 relative to guide paths 10 as described previously. Figure 1 illustrates the relationship between the encryption features of the roll 12 and the dispenser 5 just before the roll 12 is inserted. A partial view of Figure 5 shows the initial or first roll 112 immediately after it was loaded, but before the roll reached the distribution position.

If the roll just before it is inserted is not properly encrypted with the distributor 100, regardless of the reason why encryption is desirable, the roll will not fit into the distributor because the leading convex strip 124 at this point reduces the width of the guide path 110, and the spindle will be too large to advance down guide paths 110 and 111. Further, if the roll, which was inserted just before being properly encrypted but incorrectly turned, the larger spindle will not fit into the narrow guide path. and the roll will not be able to move down in guide routes 110 and 111.

-22 In FIG. 6, the roll 112 is shown after being lowered to the distribution position with its support spindles in the hollow sleeve 116, which relies on the saddle members 146 and 148 of channels 111 and 110. In this position, the roll 112 has its material passed through open bottom 150 of housing 102 for quick user access. Further in Fig. 6, a properly oriented and properly encrypted second or spare roll 113 was loaded into the housing with its spindles inserted into the upper ends of channels 111 and 110.

However, the presence of the roll 112, when it fell down to the position of the distribution position, moved the lever 160 so that the upper support end 166 of such lever was moved to the channel 111 to form a bar inside the channel 111. The left spindle of the roll 113 came in contact with the barrier with a spindle resting on the inclined surface 176 of the upper support end 166 of the lever 160.

The inclined spring 190 is compressed by moving the roll 112 down, so that the spring 190 utilizes the friction resistance to inhibit the free rotation of the roll 112. Also, the movement of the roll spindle 112 down, in conjunction with saddle members 146 and 148, causes the spindle to come into the end pin. 118 with a spring-tilted latch 180 below the end of the latch 184. Therefore, each attempt is made with the end of the roll detection 164 of the lever 160 above the left spindle of the roll 112 and the end 184 of the spring-tilted latch 180 above the right spindle of the roll 112. lifting roll 112 is effectively blocked by using these two elements, which rest above the support spindles of the sleeve, at opposite ends of roll 112.

The state of the rolls 112 and 113, as shown in Figure 6, where both are held in their respective positions, that is, in the distribution position and in the position

-23 reserve rolls will continue as long as the sheet material from the roll of toilet paper pulled out by the users is used. During the use of the roll material 112, the control lever 160, especially under the force of the spring 168 that causes it to tilt, will continuously detect the hollow roll sleeve 116. Thus, the second roll 113 in the spare roll position during the detection of the hollow roll sleeve 116 is continuously held therein. position.

As can be seen in Fig. 6, the diameter of the rolls 113 and 112 with respect to the length of the lever 160, where such lever extends beyond its hinge 162, such that it maintains these full rolls 113 and 112 so that they are not in contact with each other. Thus, the rolls 113 and 112 will be precisely this full size and the length of the pivotally mounted lever 160, continuously retained without contact with each other when the leaf material is removed from the roll 112.

The detection of the hollow sleeve 116 of the roll 112 is thus used to continue holding the roll 113 in the position of the spare roll, with two rolls that are not in contact with each other at least when the roll roll 112 is slowly empty, so that during this last stage of roll wear 112 there is no friction between the backup roll 113 and roll 112. An important concept is that the detection of the intact roll roll 112 is used to continue holding the roll 113 in the backup roll position and at least to keep two rolls without contacting each other during the roll phase 112 is closer to emptying its leaf material.

When the sheet material is completely pulled out and the roll 112 is emptied or consumed, the condition shown in Fig. 7. During this time, the spare roll or other roll 113 is still retained in the position of the spare roll at the upper end of the housing 102. However, the lower end behind sensing 164 of lever 160 as it presses axially against the upper end of the hollow end

-24 roll sleeve 116, after emptying sheet material from hollow roll sleeve 116, forces the sleeve to bend.

The forces acting on the hollow sleeve 116, which can be deformed rapidly, can best be described by reference to Figure 7 and the reference symbols shown therein. The filled roll 112 has spindles 121 and 120 of its end studs 119 and 118 of the sleeve supporting the roll wound on the hollow sleeve 116, which rests on the saddles 146 and 148. When the sheet material constituting the roll 112 is worn, the weight of the sleeve 116 and its end plugs 119 and 118 still rely on the saddles 146 and 148, as shown in Figure 7. Thus, there are reaction forces R _L and R _r acting along the lines of arrows shown on the left and right, where the spindles are in contact with saddles.

At the same time, the axial forces are directed to the upper portion of opposite ends of the sleeve 116 with the lower end 164 of the spring-tilted lever 160 and the leaf spring 190 on the other side of the distributor housing 102. The axial forces are represented in Figure 7 by the arrows F _L and F _R.

These axial forces F _L and F _R are directed to the sleeve from left and right and tend to bend the sleeve 116 downward by being directed to the upper portions of opposite ends of the sleeve. This downward bending of the sleeve 116 is further accelerated by a force F _L that generates a torque around the contact point where the spindle 121 of the end plug 119 cooperates with the saddle member 146 retained by the reaction force R _L. Similarly, the force F _R acting against the opposite end of the sleeve 116 generates a torque about the contact point of the spindle 120 of the end plug 118 retained by the reaction force R _r . These two torques or torques acting at opposite ends of the hollow sleeve 116 further accelerate the downward deformation of the roll sleeve 116 which can be deformed rapidly. Thus, when the sheet material is consumed from the sleeve 116, so

-25 that such material is not present to reinforce a rapidly deformable sleeve, a slight auxiliary pressure W down, performed manually, as shown in Figure 7, can easily remove the sleeve 116 held in the position of the saddle 146 and 148 inside the dispenser 100.

In a nutshell, still referring to Figure 7, the axial forces F _L and F _r place the upper surface of the sleeve 116 under compression, thereby attempting to bend it. Additionally, the torques between F _L and R _L and F _R and R _r at each end tend to rotate the bent sleeve down and out of the manifold. In some cases, a minimum force W is directed to the upper surface of the sleeve 116 and is then easily removed from the sleeve and its end plugs 119 and 118. The hollow sleeve 116 is then released from the channels of paths 111 and 110 and their saddle members 146 and 148, and falls out of the bottom 150 of the housing 102.

This releases the lever 160, especially under the pressure of the leaf spring 168, to move to the position as shown in Figure 5. Such movement of the lever 160 moves the detection end 164 to the area of the roll distribution position and also moves the supporting end 166 of the lever 160 away from the position of the backup roll position, thereby opening the channel of the guide path 111 such that the roll spindles 113 are now released and this roll can be moved down to the distribution position at the bottom of the housing 102.

This condition is shown for Figure 113 in Figure 8. From this figure, it will be seen that the lever 160 has been moved again by its lower sensing end 164, which has detected the hollow sleeve 116 inside the roll 113. This movement of the lever 160 again moves the upper the support end 166 of the lever 160 to the channel locking position of the route 111.

-26When loading a properly encrypted and inverted new roll into the dispenser housing 102, by entering its outwardly projecting roll spindle support springs in opposite channels 111 and 110, this new roll can only travel down these channels to the point where one of its spindles it does not encounter the upper support end 166 of the lever 160, which blocks channel 111. This roll will again be held in reserve until the roll is positioned in the roll distribution position, and which rests on saddle members 146 and 148, will not be consumed.

As can be seen in Figure 10, if a roll with a split sleeve 116 ”is used and consumed, the lower end for detecting 164 of the lever 160 presses toward the end of the intact roll sleeve 116” and consumes it after the roll of paper material from the intact sleeve 116 ” , forces the bending of its components. This causes the sleeve parts to be released from the hold in the roll distribution position. More specifically, this part of the sleeve forces them to advance in the direction of the broken line shown in Figure 10 for the left portion of the sleeve. Thus, the force given by the sensing end 164 not only directs the bending force toward the end of the sleeve, but also due to the contouring and shaping of the sensing end 164, directs that flexing force toward the end of the sleeve in a direction that tends to lift the sleeve from saddle 146 and s. this to its release from the friction that previously existed between the roll spindle support spindle and the saddle member 146 during normal use of roll material of roll 112.

When the intact sleeve is exposed to bending between the components of the sleeve following the consumption of sheet material from the intact roll sleeve, the sleeve parts are released from the channels of paths 110 and 111 and their saddle members 146 and 148 and fall out of the open bottom 150 of the housing. This releases the lever 160,

-27 especially under pressure of the leaf spring 168 to move to the position as shown in Figure 5.

This displacement effectively moves the end of detection lever 164 to the area of the roll distribution position and also moves the support end 166 of the lever 160 away from the area of the reserve roll position, thereby opening the channels of the guideways so that the roll spindles are released to allow a new the roll moves down into the distribution position, at the bottom of the housing 102.

It should be noted that the position of the leading convex strip 124 and the existence of the annular groove 126 do not impair the ability of the distributor 100 to separate the sheet material from the rolls, store the rolls in the spare position, or move the rolls from the spare position to the distribution position.

Although individual embodiments of the invention have been shown and described, it is admitted that those skilled in the art will think of their various modifications. Therefore, the scope of the invention described herein will be limited only by the appended claims.

Claims (43)

REQUIREMENTS 1. A dispenser for dispensing flexible sheet material from a roll having projecting end members, one projecting end portion having an annular groove, said dispenser comprising: first and second opposite lateral side walls, each lateral side wall having a leading path for guiding a single projecting end of the roll sheet material, said guide path of said first lateral side wall having an extended guide projection, said extended guide projection being so large and shaped that it fits properly within the annular groove of one projecting end portion. 2. The dispenser of claim 1, wherein said guideways are generally rectangular in cross-section, said guideways further including a plurality of interior wall surfaces, said guide projection extending from one of said internal wall surfaces of the leading path of said first lateral lateral wall to said leading path of said first lateral side wall. The dispenser of claim 2, wherein the leading path of said first lateral side wall is less wide than the leading path of said second lateral side wall. The dispenser according to claim 3, wherein the guide path of said second lateral side wall has no guide projections. 5. The dispenser of claim 2, wherein said plurality of interior wall surfaces includes a forward facing wall surface, a rear facing wall surface, and an inward facing wall surface, said -29 guide protrusion mounted on one of the forward and backward facing surfaces of the leading path of said first lateral side wall. A dispenser according to claim 1, wherein said guideways and extended guide bulge are generally vertically oriented. The dispenser according to claim 1, wherein said guide projection is highly complementary to the annular groove. 8. A distribution system for distributing flexible material from rolls of sheet material; that system comprises: dispenser for products rolled up in rolls, said dispenser includes first and second opposite lateral side walls, each lateral side wall has a guide path, said guide path of said first lateral side wall has an extended guide projection; and at least one roll of sheet material, each of said rolls of sheet material comprising a flexible sheet material wound around a hollow sleeve having a first and a second end and means for guiding the roll positioned partially within said roll sleeve and extending outward from both said first and second ends thereof. the hollow roll sleeve for guiding the roll of sheet material in opposite guideways of the dispenser into the roll of the rolled product, said roll guidance means include a first outward projecting cylindrical portion extending outwardly over the first end of the hollow roll insert and a second outwardly projecting cylindrical part extending outwards the other end of the hollow roll sleeve, said first outward projecting portion includes at least one annular groove located in its circumference; -30in which, when said roll of sheet material is inserted into said dispenser, said guide paths lead an outwardly projecting cylindrical portion of the roll of sheet material with said annular groove cooperating with said extended guide projection. The dispensing system of claim 8, wherein said annular groove is cross-sectional shaped U-shaped and extends around the first projecting outward portion. 10. The dispensing system of claim 8, wherein the first outward projecting portion has a smaller diameter than the second outward projecting portion. 11. The distribution system of claim 10, wherein said cross-sectional guideways are generally rectangular, said guideways further comprising a plurality of interior wall surfaces, said guide projection extending from one of said internal wall surfaces of said first lateral side wall guideway to said leading path of said first lateral side wall. The dispensing system of claim 11, wherein said guideways and extended guide bulge are generally vertically oriented. 13. The dispensing system of claim 8, said roll guidance means further comprising a first end plug located in the first end of the hollow roll sleeve, and a second end plug located in the second end of the hollow roll sleeve, said first end plug including an inwardly protruding portion housed within said hollow roll sleeve. roll sleeve and said first projecting outward portion, said second end plug includes inwardly projecting portion mounted -31 the inside of said hollow roll sleeve and the second projecting projection. The dispensing system of claim 13, wherein the leading path of said second lateral side wall has no guiding projections and the second projecting projection has no annular grooves. 15. The dispensing system of claim 8, said first outward projecting portion includes an end positioned at a distance from said first end of said hollow roll sleeve, said at least one annular groove being inserted between said first end of said hollow roll sleeve and said distal end. A dispensing system according to claim 15, including straightening means, for aligning said at least one annular groove with respect to said first end of said hollow roll sleeve for aligning said at least one annular groove with said extended guide projection when said roll of sheet material is inserted into the specified dispenser. 17. The dispensing system of claim 16, wherein said settling means include a stop edge extending from said roll guide means adjacent to said projecting outward portion, said stop edge cooperating with said first end of the hollow sleeve by installing said at least one annular groove within a predetermined distance from said first end of said hollow roll sleeve. 18. The dispensing system of claim 13, wherein said inwardly protruding portion of said first end plug includes a stop edge, -32ki radially projecting outwards from both said inwardly projecting portion and projecting outwardly of said first end plug, said stopping edge fringes said first end of the hollow roll sleeve when said outwardly projecting portion of said first end plug is completely inserted into said hollow sleeve, to thereby place said at least one annular groove within a predetermined distance from said first end of said hollow roll sleeve to align said at least one annular groove with said extended guide projection when said roll of sheet material is inserted into said dispenser. The distribution system of claim 8, wherein the first outward projecting portion has a smaller diameter than the second outward projecting portion, and the leading path of said first lateral side wall is less wide than the leading path of said second lateral side wall. 20. The distribution system of claim 8, wherein said projection and said annular groove are highly complementary. 21. A roll of sheet material for use in a dispenser in a roll-wrapped product having an opposite leading path and a leading projection in one of the leading paths, the roll of sheet material comprises: flexible sheet material wrapped around a hollow sleeve, said sleeve having first and second ends; and means for guiding the roll, partially mounted within said hollow roll sleeve and extending outward from both said first and second ends of said hollow roll sleeve for guiding the roll sheet -33materials in opposite guideways of the dispenser into the roll of the coiled product, said roll guidance means include a first outwardly projecting cylindrical portion extending outwardly over the first end of the hollow coil sleeve and a second outwardly projecting cylindrical portion extending outwardly over the second end of the hollow coilage coil; said first and second outward projecting portion allow the roll to be guided within opposite guideways of the dispenser into the roll-bent products, said first outward projecting portion including at least one annular groove located in its circumference and cooperating with the guide projection. 22. A roll of sheet material according to claim 21, said annular groove extending completely around the projecting projection. 23. A sheet material roll according to claim 21, wherein the first projecting projection has a smaller diameter than the second projecting projection. A roll of sheet material according to claim 23, wherein the second projecting projection has no annular grooves. 25. A sheet material roll according to claim 21, said annular groove in the cross section being U-shaped and extending completely around said first outward projecting portion. 26. The roll of sheet material according to claim 21, said first outward projecting portion includes a first end mounted at the first end of the hollow sleeve and the second end positioned at a distance from said first end of said hollow sleeve, said at least one annular groove fully -34 Mounted between said first and second ends of said first projecting outward portion. A roll of sheet material according to claim 26, which includes straightening means for aligning said at least one annular groove within a predetermined distance from said first end of said hollow roll sleeve. A roll of sheet material according to claim 27, wherein said settling means include a stop edge extending from said roll guide means directly along said first outward projecting portion, said stop edge cooperating with said first end of said hollow sleeve in positioning said at least one annular groove within said predetermined distance from said first end of said hollow roll sleeve. 29. A sheet material roll according to claim 21, said roll guidance means further comprising a first end plug mounted in the first end of the hollow roll sleeve, and a second end plug mounted in the second end of the hollow roll sleeve, said first end plug including an inwardly convex portion arranged within said said hollow roll sleeve and said first outward projecting portion, said second end plug includes an inwardly convex portion mounted within the hollow roll sleeve and said second outwardly projecting portion. 30. A sheet material roll according to claim 29, said first outward projecting portion includes one end positioned at a distance from said first end of said hollow roll sleeve, said at least ed annular groove -35 Mounted between said first end of said hollow roll sleeve and said distal end. 31. A sheet material roll according to claim 30, wherein said inwardly protruding portion of said first end plug includes a stopping edge projecting radially outward at both said inwardly protruding portion and said outwardly projecting portion of said first end plug, said stopping edge being circumscribed said first end of said hollow roll sleeve when said inwardly convex portion of said first end plug is fully inserted into said hollow roll sleeve to thereby place said at least one annular groove within a predetermined distance from said first end of said hollow roll sleeve. 32. A sheet material roll according to claim 30, said annular groove extending completely around the first outwardly projecting portion of said first end plug. 33. A sheet material roll according to claim 30, said first outward projecting portion having an inner portion extending from said first end of said roll to said annular groove and an outer portion extending from said annular groove to an end positioned away from said first end of said hollow the roll sleeve, said inner and outer portions being the same diameter. A roll of sheet material according to claim 30, wherein the first outward projecting portion of said end plug has a smaller diameter than the second outward projecting portion of the second end plug. -3635. A roll of sheet material according to claim 34, wherein the second outwardly projecting portion of said second end plug has no annular guide grooves. 36. A roll of sheet material according to claim 30, said annular groove having a cross-section in the shape of a letter U and extending completely around said first outward projecting portion on said first end plug. 37. A sheet material roll according to claim 30, wherein said inwardly convex portions of both said first and second end plugs include a tapered centering portion to fit their end plug into each end of said hollow roll sleeve. A sheet material roll according to claim 21, wherein the annular groove is highly complementary to the guide projection. 39. A roll of sheet material for use in a dispenser in a roll of a curved product having an opposite leading path and a leading projection in one of the leading paths, the roll of sheet material comprises: flexible sheet material wrapped around a hollow roll sleeve, said sleeve having first and second ends; a first end plug is located at the first end of said hollow roll sleeve and extends outward from said first end of said hollow roll sleeve, said first end plug includes an inwardly protruding portion housed within said hollow roll sleeve and an outward projecting portion to guide the roll of sheet material in each guide distributor paths -37In the roll of the twisted product, said outwardly projecting portion in its circumference includes at least one annular groove cooperating with the guide projection; and a second end plug mounted at the other end of said hollow roll sleeve and extending outward from said other end of said hollow roll sleeve, said second end plug includes an inwardly protruding portion housed within the hollow roll sleeve and an outward projecting portion to guide the roll of sheet material in each guideway dispenser in a roll of rolled product. A roll of sheet material according to claim 39, wherein the projecting portion of said second end plug has no annular grooves. 41. A roll of sheet material according to claim 40, said outwardly projecting portion of said first end plug includes a first end mounted at the first end of the hollow roll sleeve and the second end positioned away from said first end of said hollow roll sleeve, said at least one annular groove being fully inserted between said first and second ends of said projecting outward portion of said first end plug. 42. A sheet material roll according to claim 41, wherein said inwardly protruding portion of said first end plug includes a stop edge that extends radially outwardly adjacent both adjacent said inwardly protruding portion and said outwardly protruding portion of said first end plug. the first end of said hollow roll sleeve when said inwardly convex portion of said first end plug is completely inserted into said hollow -38 sleeve to accommodate said at least one annular groove within a predetermined distance from said first end of said hollow roll sleeve. A roll of sheet material according to claim 40, wherein said annular groove is highly complementary to the guide projection. A roll of sheet material according to claim 40, wherein the projecting portion of said first end plug has a smaller diameter than the projecting portion of the second end plug.