Dispenser for storing and dispensing hygiene products
10674876 · 2020-06-09
Assignee
Inventors
Cpc classification
A47K10/34
HUMAN NECESSITIES
A47K2010/3233
HUMAN NECESSITIES
International classification
Abstract
An inventive dispenser for storing and dispensing hygiene products is disclosed. The dispenser includes, in a closed state, a rear wall, two opposite side walls, a front wall, and an upper wall. The dispenser further includes a dispensing opening and an openable cover that may be opened for refill of the dispenser. At least one wall of the dispenser includes a support structure made at least mainly of plastic material. An outer thin metal sheet is laminated to an exterior surface of the support structure, and the surface of the metal sheet includes a curved surface in at least one direction.
Claims
1. A dispenser for storing and dispensing hygiene products, comprising, in a closed state: a rear wall, two opposite side walls, a front wall, an upper wall, a dispensing opening, and an openable cover that may be opened for refill of the dispenser, wherein the walls of the dispenser are made at least mainly of plastic material, wherein an outer thin metal sheet is laminated to a portion, but not all of, an exterior surface of the walls, and wherein a surface of the metal sheet comprises a curved surface having a first radius of curvature in at least one direction and the metal sheet comprises at least one folded side edge forming a double-layered side edge.
2. The dispenser according to claim 1, wherein the metal sheet extends continuously over part of at least two neighbouring walls of the dispenser.
3. The dispenser according to claim 1, wherein the metal sheet extends continuously over part of at least three consecutive walls of the dispenser.
4. The dispenser according to claim 3, wherein the walls are at least the front wall and the two opposite side walls, or the front wall, the upper wall, and a lower wall.
5. The dispenser according to claim 1, wherein the surface of the metal sheet in a centre region of the walls has a radius of curvature in the range of 500-15,000 millimetres.
6. The dispenser according to claim 1, wherein the exterior surface of the metal sheet, in the corner region between neighbouring wall sections, has a radius of curvature in the range of 5-200 millimetres.
7. The dispenser according to claim 1, wherein the exterior surface of the metal sheet is free from discrete changes in radius of curvature.
8. The dispenser according to claim 1, wherein the exterior surface of the metal sheet has zero Gaussian curvature or a positive Gaussian curvature.
9. The dispenser according to claim 1, wherein the metal sheet exhibits a cylindrical curvature over at least a main region of the surface of the metal sheet.
10. The dispenser according to claim 1, wherein the metal sheet is a single piece of metal having a substantially constant thickness.
11. The dispenser according to claim 1, wherein the metal sheet has a thickness in the range of 0.2-1.5 millimetres.
12. The dispenser according to claim 1, wherein the metal sheet is made of stainless steel or an aluminium alloy.
13. The dispenser according to claim 12, wherein the metal sheet is provided with an anti-fingerprint coating.
14. The dispenser according to claim 1, wherein all of an exterior surface of the metal sheet is non-flat.
15. The dispenser according to claim 1, wherein all of a portion of the exterior surface on which the metal sheet is fastened is non-flat.
16. The dispenser according to claim 1, wherein substantially all of an interior surface of the metal sheet is supported by at least one of the walls.
17. The dispenser according to claim 1, wherein the dispenser comprises at least two outer thin metal sheets, each being fastened to an individual exterior surface of at least one of the walls, and each metal sheet comprising a curved surface in at least one direction.
18. The dispenser according to claim 1, wherein the at least one folded side edge extends in a direction of curvature of the metal sheet.
19. The dispenser according to claim 1, wherein the at least one folded side edge has been folded about 180 degrees inwardly towards the interior of the dispenser such that the at least one folded side edge is laminated within a peripheral channel of the support surface for receiving the at least one folded side edge.
20. The dispenser according to claim 18, wherein the folded portion of the metal sheet extends in the range of 1-10 millimetres in a direction perpendicular to the folded side edge.
21. The dispenser according to claim 1, wherein the exterior surface of the metal sheet is flush with any neighbouring exterior surface of the plastic wall of the dispenser.
22. The dispenser according to claim 1, wherein the metal sheet is permanently fastened to at least one of the walls by adhesive.
23. The dispenser according to claim 1, wherein the dispenser comprises at least one hinge arrangement having a first hinge member formed integrally with an interior of the cover, and a second hinge member formed integrally with an interior of a body of the dispenser, such that at least one hinge arrangement is concealed in a closed state of the dispenser.
24. The dispenser according to claim 23, wherein the hinge arrangement comprises a vertical pivoting axis enabling the cover to be pivoted sideways during opening and closing of the dispenser.
25. The dispenser according to claim 1, wherein each of the rear wall, the side walls, the front wall, and the upper wall is made at least partly of plastic material.
26. The dispenser according to claim 1, wherein the cover forms at least part of the front wall and at least part of the upper wall of the dispenser, and the cover extends over an entire width of the dispenser.
27. The dispenser according to claim 1, wherein the dispenser is arranged to be permanently mounted with its rear wall to a vertical wall, or as a stand-alone dispenser suitable for being positioned on a horizontal surface.
28. The dispenser according to claim 1, wherein the dispenser is arranged to dispense tissue sheets from a stack of sheets or a roll, or liquid or viscous materials.
29. A method for manufacturing a dispenser comprising: forming a dispenser made mainly of plastic material, the dispenser comprising, in a closed state: a rear wall, two opposite side walls, a front wall, an upper wall, a dispensing opening, and an openable cover that may be opened for refill of the dispenser, wherein the walls of the dispenser are made at least mainly of plastic material, cutting and forming a metal sheet, such that the metal sheet comprises a curved surface having a first radius of curvature in at least one direction and the metal sheet comprises at least one folded side edge forming a double-layered side edge, and laminating the metal sheet to a portion, but not all of, an exterior surface of the walls.
30. The dispenser according to claim 2, wherein the metal sheet further comprises a corner region having a second radius of curvature smaller than the first radius of curvature.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) Embodiments of the invention will now be described in detail with reference to the figures, wherein:
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DETAILED DESCRIPTION OF PARTICULAR EMBODIMENTS
(10) Various aspects of the invention will hereinafter be described in conjunction with the appended drawings to illustrate and not to limit the invention, wherein like designations denote like elements, and variations of the inventive aspects are not restricted to the specifically shown embodiments, but are applicable on other variations of the invention.
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(13) The plastic side walls of the dispenser serve as support structures 34-36 for the metal sheets 31-33. Since the underlying support structure 34-36 of each metal sheet 31-33 provides the necessary strength and rigidity of the dispenser, the metal sheets 31-33 can be made relatively thin without having problems with stability or deformation. The metal sheets 31-33 provide the dispenser 1 with a perceived robust design and an aesthetical appearance while still enabling a low manufacturing cost. The metal sheets of the dispenser makes the user perceive the dispenser as being made more or less completely of metal, and consequently as a relatively robust and high quality dispenser. A dispenser made more or less completely of metal has many disadvantages, such as problems of assembling metal parts by welding, which often results in low surface finish of the dispenser, and being technically difficult for stainless steel. A metal dispenser is also relatively heavy and costly due to the material cost and is difficult to manufacture. Consequently, the disclosed dispenser combines the advantages of a plastic dispenser, such as cost-effective manufacturing and low weight, with the advantages of a metal outer finish, such as resistance to scratches or long-term use, attractive appearance and high exterior surface finish. The combination of a plastic supporting chassis of the dispenser with the exteriorly mounted thin metal sheet is realised by a cost-effective lamination process where the plastic chassis and metal sheet first are manufactured individually before being joined in a lamination process. Thereby, both the plastic dispenser chassis and metal sheet can be manufactured using manufacturing processes selected specifically for each part. The final lamination process of the pre-formed plastic dispenser and pre-formed metal sheet may subsequently be easily and quickly performed.
(14) Each metal sheet 31-33 can be permanently fastened to the support structure of the dispenser by means adhesive, in particular by means of double-sided bonding tape or glue. Attachment by adhesive has the advantage of enabling attachment over a large surface area and without any visible fasteners, such as screw or rivets. Each metal sheet 31-33 is here supported over substantially its entire interior surface by an individual support structure 34-36. Thereby, a reduced metal sheet thickness can be selected, and the form of the assembled dispenser is largely determined by the form of the exterior surfaces of the support structure 34-36. However, the support structure 34-36 can alternatively include holes and cavities within the support structure 34-36, and merely form a framework of exterior surfaces on which the metal sheets 31-33 are laminated. This design requires less plastic material but also metal sheets 31-33 that exhibit a certain minimum internal strength and rigidity to prevent deformation of the metal sheets 31-33 in the areas lacking support from the support structure 34-36.
(15) The metal sheet can be made of stainless steel due to its corrosion and stain resistance, as well as the low maintenance and lustre. However, other metal material may alternatively be used, such as aluminium alloy or more conventional steel. If stainless steel is selected it may be advantageous to apply an anti-fingerprint coating to the metal sheet, or selecting a stainless steel grade having a fingerprint-resistant surface finish. Each individual metal sheet laminated to the support structure is made of single piece of metal having a substantially constant material thickness. The metal sheet has typically a thickness in the range of 0.2-1.5 millimetres, or in the range of 0.35-0.9 millimetres, or in the range of 0.5-0.7 millimetres. The preferred thickness depends on the tensile strength of the selected material, as well as on the design of the underlying support structure, and may be selected in accordance with the specific need.
(16) The dispenser is designed to have a smooth exterior surface. This aspect is for example illustrated in
(17) The dispenser shown in
(18) The dispenser shown in
(19) An exterior surface of the front support structure 34 of the dispenser 1 includes an outer thin metal sheet 31 laminated thereto, an exterior surface of an upper support structure 38 of the dispenser 1 includes an outer thin metal sheet 32, and an exterior surface of a lower support structure 39 of the dispenser 1 includes an outer thin metal sheet 33 laminated thereto respectively. The metal sheet 31 at the front extends over the entire width of the dispenser, i.e. from one side wall 4 to the other side wall 5. The metal sheet 31 at the front further extends over the entire front wall 6 of the dispenser in the vertical direction 19 and continues a certain length onto the upper and lower support structures 38, 39 respectively. The metal sheet 32 at the upper wall 7 covers the remaining part of the upper support structure 38 and extends a certain distance down towards or on the rear wall 3. Similarly, the metal sheet 33 of the lower support structure 39 covers the remaining part of the lower support structure 39 and extends a certain distance up towards or on the rear wall 3. The metal sheet 31 at the front includes a centrally arranged front region 24 having a relatively large radius of curvature, front corner regions 25 having a reduced radius of curvature and side regions 26 with a larger radius of curvature again. The metal sheets 32, 33 at the upper and lower walls have in the region 28 of the upper and lower walls 7, 12 a relatively large radius of curvature and in the rear corner regions 27 a smaller radius of curvature.
(20) The visible exterior surface of at least one metal sheet 31-33 exhibits in a closed state of the dispenser 1 a curved surface in at least one direction, or over the entire outer surface of the metal sheet 31-33. This aspect concerns primarily the metal sheets of the dispenser that are easily observable on a closed dispenser by a user. One reason for providing the metal sheet with a curved surface is to accomplish a more attractive visual appearance. Plastic material is difficult to control during the solidification phase and a flat surface may exhibit regions of flat surfaces and regions of non-flat surfaces. A thin metal sheet laminated on such a plastic support surface would exhibit regions of flat surfaces and regions of non-flat surfaces, such the reflections seen by a user would include discrete steps, non-continuous variations, etc. thereby generating a non-esthetical visual impression. One way for avoiding this unambiguous surface condition is to provide a part of the support structure in at least critical areas with a pre-curved surface, thereby creating a controlled continuous change in reflection as seen by a user. Critical areas are those areas that are most often view by a user. Also, the metal sheet laminated to the front wall of the dispenser can be a curved surface. For example, the visible exterior surface of the metal sheet in the front region 24, side region, upper region or lower region 26 wall may have a radius of curvature in the range of 500-15 000 millimetres, or in the range of 1000-12 000 millimetres, or in the range of 4000-8000 millimetres. The exterior surface of the metal sheet in the corner regions between neighbouring wall sections may have a radius of curvature in the range of 5-200 millimetres, or in the range of 10-130 millimetres, or in the range of 30-80 millimetres.
(21) The visible exterior surface of the metal sheet can be free from discrete changes in radius of curvature for the purpose of avoiding any interruptions and/or un-continuous reflections in the surface of the metal sheets. As a matter of fact, the metal sheet can be non-flat over its entire visible exterior surface, and also the support surface on which the metal sheet is fastened can be non-flat over its entire support surface.
(22) The visible exterior surface of the metal sheet may have a certain radius of curvature in a first direction and zero radius of curvature in a second direction, which is different from the first direction, which arrangement is referred to as a surface having zero Gaussian curvature. A curved metal sheet surface having zero Gaussian curvature at a point P means that the metal sheet surface has at point P zero radius of curvature in at least one direction, i.e. no curvature in at least one direction. Furthermore, the visible exterior surface of the metal sheet may have a curvature in each position of the visible exterior surface of the metal sheet while still having zero Gaussian curvature in all said positions. This corresponds to a metal sheet having a cylindrical curvature or bend with partly fixed and/or partly varying radius of curvature over the complete length of the metal sheet, and with zero curvature in the direction perpendicular to a length direction. Such a curved metal sheet is advantageously formed in a roll forming process since a computer numerical controlled (CNC) cylindrical press rollers of the roll forming machine enable cost-efficient and flexible forming of metal sheets having nearly no limitation in terms of the radius of curvature of the rolled surfaces.
(23) Alternatively, the surface of the metal sheet includes a positive Gaussian curvature at least one surface point, or at each exterior surface point of the metal sheet surface. Such a metal sheet can be manufactured by pressing the metal sheet in a hydraulic press using a special pressing tool. The Gaussian curvature at any point of a surface may be defined as the product of two principal curvatures K=k1k2, where a first principal curvature k1 corresponds to the maximal curvature at said point and the second principal curvature k2 corresponds to the minimum curvature at said point. A cylindrical surface consequently has zero Gaussian curvature because the curvature along the length of the cylinder is zero and in other directions there is positive curvature so the product of the maximum and minimum curvatures k1, k2 is zero making the Gaussian curvature zero. A surface having a point where both principal curvatures are positive is referred to as a positive Gaussian curvature, i.e. a point on the surface where the surface is convex in all directions.
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(25) The disclosed dispenser may be arranged to dispense different types of hygienic material without departing from the inventive concept, and where only small modifications in shape, form, and size of the dispenser is required to suit the new dispensing material. For example, the disclosed dispenser may be arranged to dispense handtowels, napkins, toilette paper, wiping sheets and similar hygienic products. More in detail, the dispenser may dispense individual pre-cut tissue sheets from an interfolded or non-interfolded stack of sheets. The dispenser may be provided with a tear surface close to the dispensing opening for enabling a user to tear of a length of sheet material from a roll within the dispenser, or the dispenser may be provided with cutting means for automatically cutting and dispensing pieces of sheet material from a roll within the dispenser. The sheet material may be paper sheet material, or other types of sheet material having a mixture of cellulosic, synthetic, non-synthetic fibres and nonwoven tissue. The dispenser may alternatively be formed to carry a container with liquid or viscous materials, in particular liquid soap. The position of the dispensing opening is irrelevant to the invention and may for example be located at the bottom or top of the dispenser. Similarly, the dispenser may be suitable for being fastened to a vertical wall or free-standing.
(26) A free-standing table dispenser is for example shown in
(27) The cross-sectional cut along section B-B in
(28) The disclosure also involves a method for manufacturing a dispenser according to an embodiment of the invention. The method includes the step of forming a dispenser 1 made mainly of plastic material. The dispenser including, in a closed state a rear wall 3, two opposite side walls 4, 5, a front wall 6, an upper wall 7, a dispensing opening 11 and an openable cover 14 that may be opened for refill of the dispenser 1, wherein at least one wall of the dispenser 1 includes a support structure 34-36, 38, 39 made at least mainly of plastic material. The method further includes the step of preparing the metal sheet 31-33. This is performed by cutting and mechanically forming the metal sheet 31-33, such that metal sheet 31-33 includes a curved surface in at least one direction. A final step of the method includes laminating the metal sheet 31-33 onto an exterior surface of the support structure 34-36, 38, 39, for example by means of an adhesive, such as a double-sided adhesive tape.
(29) Reference signs mentioned in the claims should not be seen as limiting the extent of the matter protected by the claims, and their sole function is to make claims easier to understand.
(30) As will be realised, the invention is capable of modification in various obvious respects, all without departing from the scope of the appended claims. For example, the radius of curvature of the metal sheets 31-33 may be constant of certain segments and vary more or less continuously over other segments. The metal sheets 31-33 may exhibit zero curvature in a first direction and a positive curvature in a second direction perpendicular to the first direction, either in certain areas or over the entire surface of the metal sheet. The metal sheets 31-33 may alternatively, or in combination with the above, include regions having a positive curvature in both said first and second direction. Furthermore, the dispenser according to an embodiment of the invention may alternatively have a cylindrical or elliptical outer form. Accordingly, the drawings and the description thereto are to be regarded as illustrative in nature, and not restrictive.