EP2933208A1

EP2933208A1 - A reusable waste receptacle and a method for emptying it

Info

Publication number: EP2933208A1
Application number: EP14165079.6A
Authority: EP
Inventors: Olov Mattsson; Katy Ho
Original assignee: Conscia AB
Current assignee: Green Lizzie AB
Priority date: 2014-04-17
Filing date: 2014-04-17
Publication date: 2015-10-21
Anticipated expiration: 2034-04-17
Also published as: EP2933208B1

Abstract

A reusable waste receptacle (10) comprising an inner flexible container (12) having an open top end (14) and a closed bottom end (16), and a rigid outer container (18). A collapsible section (20) is provided between said open top end (14) and said closed bottom end (16) and said open top end (14) is enclosed by an attachment section (22). A rigid supporting collar (24) is arranged to attach said attachment section (22) to said rigid outer container (18).

The reusable waste receptacle (10) is emptied by pressing said closed bottom end (16) towards and past said open top end (14) while maintaining said open top end (14) in a fixed position in said rigid outer container (18), and then pulling said closed bottom end (16) towards and past said open top end (14) while maintaining said open top end (14) in a fixed position in said rigid outer container (18).

Description

TECHNICAL FIELD

The invention relates to a reusable waste receptacle comprising an inner flexible container having an open top end and a closed bottom end, and a rigid outer container.

PRIOR ART

Waste management is an area that has rendered a large interest during the last decades due to the environmental problems that are caused by the waste. In order to decrease the environmental impact from waste, recycling of waste is performed. In addition, waste recycling enables that the valuable resources of the waste are maintained.
The Extended Producer Responsibility (EPR) is a strategy where the responsibility for managing the product when it, at the end of its lifetime, is considered waste is put on the producer. By implementing EPR, waste management and recycling become even more concerned. In order to enable waste recycling, there have been introduced automatic separation techniques for separating different fractions of waste from each other when different wastes initially are mixed. However, it has in many cases been considered more efficient to let the consumer divide the waste into different fractions already when the consumer disposes the product. This has raised a demand for equipment and procedures for handling the fractions efficient from when the product is considered waste until the waste is recycled or disposed.
Much effort has been devoted to the large scale handling of the fractions of waste, i. e. when the waste has been collected from the consumers. The handling of waste on the small scale, i.e. initially collecting waste in different fractions when a product is considered waste and transferring the waste to a waste bin from which the waste is collected at the consumers or in a public place, has received much less interest.
CH704483 discloses a waste container comprising a solid cover, a stable collar, a flexible insert and a stable base. The height of the stable collar is equal to the height of the flexible insert, so as to allow the flexible insert to be inserted within the stable collar and to compress the waste content such that base is made to contact with solid cover. The air inside the main structure is sucked by vacuum pump.
US7273155 discloses a trash receptacle that receives and supports a thin flexible trash bag liner and sucks the empty flexible liner tight against the interior surfaces of the receptacle in a full open position absent any air pockets or billowing by extracting air trapped between the exterior surface of the liner and the interior surfaces of the receptacle. As a result the empty flexible is sucked tight against the interior surfaces of the receptacle in a full open position absent any air pockets or billowing.

SUMMARY OF THE INVENTION

An object of the present invention is to provide a reusable waste receptacle that is readily emptied and then used again. In accordance with the invention the reusable waste receptacle comprises an inner flexible or collapsible container having an open top end and a closed bottom end, and a rigid outer container. In use the rigid outer container protects and substantially encloses the inner flexible container. In accordance with the invention source separation is highly facilitated.
In various embodiments the inner flexible container is formed with different sections having different properties. An upper attachment section encloses said open top end and is used to attach said inner flexible container to said rigid outer container. Said upper attachment section is sufficiently rigid to ensure that said inner flexible container is maintained in a fixed position inside said rigid outer container. The attachment section continues into a collapsible section extending to a closed bottom section at said bottom end. The collapsible section constitutes the main part of the inner flexible container and will contain the waste. A grip section extends from the bottom end.
A rigid supporting collar is used to connect said rigid outer container to said inner flexible container at said upper attachment section. The shape of said rigid supporting collar corresponds to the shape of the rigid outer container, so as to avoid a gap between the collar and the rigid outer container. In various embodiments said rigid supporting collar is formed in one piece while in other embodiments said rigid supporting collar is divided into a plurality of appropriately shaped sections.
Said rigid outer container is formed with an open bottom end or at least an open section at the bottom. When the reusable waste receptacle is emptied the inner flexible container is turned inside out. Using the open bottom end or open section at the bottom the bottom section of said inner flexible container is pressed through and out of the rigid outer container until the waste is removed. Then, the inner flexible container is returned to the previous position by pulling the grip section.
In various embodiments said inner flexible container is releasably attached to said rigid outer container. It is possible to use pins that are pressed through holes in said rigid outer container, said inner flexible container and said rigid supporting collar. The pins also can be permanently mounted to lock said inner flexible container in position in said rigid outer container.
Said rigid supporting collar can be provided with tube shaped extensions at the holes. The tube shaped extensions are pressed through holes in said inner flexible container when the inner flexible container is mounted in the rigid outer container. The pins are pressed into the tube shaped extensions and further lock the inner flexible container in position.

BRIEF DESCRIPTION OF THE DRAWINGS

In order that the manner in which the above recited and other advantages and objects of the invention are obtained will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

Fig. 1: is a schematic partial cross section view of one embodiment of a receptacle in accordance with the invention,
Fig. 2: is an enlarged cross section view of the section depicted by dash and dot lines in Fig. 1,
Fig. 3: is a schematic perspective view of one embodiment of a rigid supporting collar with a plurality of locking pins used in a receptacle in accordance with the invention,
Fig. 4: is a schematic perspective view of one embodiment of the pin shown in Fig. 3,
Fig. 5a-5f: are schematic cross section views illustrating a process of emptying a reusable waste receptacle in accordance with the invention,
Fig. 6: is a schematic perspective view of one embodiment of a reusable waste receptacle in accordance with the invention and
Fig. 7: is a schematic diagram showing combinations of different thickness and hardness of materials that can be used in an inner flexible container in accordance with the invention.

DETAILED DESCRIPTION

In the embodiment of a reusable waste receptacle 10 shown in Fig. 1 an inner flexible container 12 is completely enclosed in a rigid outer container 18. The inner flexible container 12 has an open top end 14 and a closed bottom end 16. Between the open top 14 and the closed bottom end 16 the inner flexible container 12 is formed with a flexible and collapsible section 20. At the open top end 14 the inner flexible container 12 is provided with an attachment section 22. A rigid supporting collar 24 attaches said attachment section 22 to said rigid outer container 18. A grip section 26 extends from the closed bottom end 16.
The material used for the inner flexible container 12 and the thickness of it ensure that the shape and volume of it substantially is maintained irrespective of the inner flexible container being empty or holds waste. The thickness of the material further allows the inner flexible container 12 to be turned inside out. When the reusable waste receptacle 10 is emptied the closed bottom end 16 of the inner flexible container 12 is pressed towards and through the open top end 14, c.f. Fig. 5a-Fig. 5f and description below. Then the inner flexible container 12 is pulled back using the grip section 26 to the position shown in Fig. 1.
Fig. 2 shows in more detail one embodiment of a connection between the inner flexible container 12 and the rigid outer container 18. The rigid supporting collar 24 is provided with a plurality of hollow extensions 28, c.f. Fig. 3. The extensions 28 fit in apertures in the inner flexible container 12 and corresponding apertures in the rigid outer container 18 and have a length substantially equal to the added thickness of the inner flexible container 12 and the rigid outer container 18. When mounting the inner flexible container 12 in the rigid outer container 18 the hollow extensions 28 are pressed through the apertures of both containers to ensure a correct positioning. In various embodiments the outer dimensions of the hollow extensions correspond to the inner dimensions and shape of the apertures in the inner flexible container 12 and corresponding apertures in the rigid outer container 18.
A pin 30 having an outer diameter approximately corresponding to an inner diameter of the hollow extensions 28 is then inserted through the hollow extensions 28 and coinciding apertures of the inner flexible container 12 and the rigid outer container 18 to interlock the containers. In various embodiments a circular ridge 32 is formed at an inner cylindrical surface of each hollow extension 28. A circular indentation 34 close to a top end of the pin 30 will receive the circular ridge 32 when the pin 30 is fully inserted in the position shown in Fig. 2. As a result the pin 30 will remain in position and keep the inner flexible container 12 and the rigid outer container 18 in an interlocked position. Still, withdrawal of the pin 30 is possible.
As shown in Fig. 2 the attachment section 22 can have larger thickness than the collapsible section 20 to improve stability. Also a bottom section at the closed bottom end 16 may have a larger thickness or be formed with a harder material to maintain the original shape also during the emptying process. The collapsible section 20 is formed with less hardness or smaller thickness to provide a high flexibility.
A central slit 36 extending from the top end of the pin 30 allows the pin to be compressed and removed from the interlocking position, c.f. Fig. 4. As a result the inner flexible container 12 can be removed and optionally exchanged. The pin 30 is provided with a head 38 having a diameter larger than the outer diameter of the hollow extensions 28. As a result the head 38 will fully cover the hollow extensions when the pin 30 is in the interlocking position.
The embodiment of a rigid supporting collar 24 shown in Fig. 3 is a strip formed with a continuous closed rectangular shape. The strip has a rectangular cross section. The corners are curved in accordance with an inner shape of the rigid outer container 18. The number and distribution of hollow extensions 28 depend on the size and form of the receptacle and of the intended use of it. Normally, one pin 30 is arranged for each hollow extension 28.
In various embodiments the rigid supporting collar 24 is divided into sections, each section corresponding to a separate part of the rectangular shape. The sections do not necessarily add up to a complete rectangular shape but have a total length and design to maintain the inner flexible container 12 in position in the rigid outer container 18. Different sections are indicated with dash and dot lines in Fig. 3 each section being an elongated straight strip element.
The embodiment of a pin 30 shown in Fig. 4 comprises a head 38 and a round bar 40 extending in a perpendicular direction from the head 38. The central slit 36 is formed over at least a substantial part of the length of the round bar 40. The circular indentation 34 is formed close to a top end of the round bar 40. If a pin 30 positioned in the interlocking position as shown in Fig. 2 is pulled out the central slit 36 will allow the round bar 40 to be slightly compressed and the top end can pass the circular ridge 32, c.f. Fig. 2.
Fig. 5a - 5f show schematically the process of emptying a waste receptacle 10 in accordance with the invention. In Fig. 5a the waste receptacle 10 is placed in front of a waste container 42 having an opening 44. In the embodiment shown in Fig. 5a - 5f the opening 44 of the waste container 42 is adapted in size and shape to the open top end 14 of the waste receptacle 10. In various embodiments the opening 44 of the waste container 42 is smaller or larger than the open top end 14 of the waste receptacle 10.
A first step in the process is to place the waste receptacle 10 at the opening 44 of the waste container 42. In various embodiments the waste receptacle 10 is rotatably connected to a lower edge of the opening 44. This type of connection will allow the waste receptacle 10 to be tilted in a second step as shown in Fig. 5b to the position shown in Fig. 5c.
When the waste receptacle 10 is in the position shown in Fig. 5c a third and emptying step can be started. By pressing at the closed bottom end 16 of the inner flexible container 12 for instance using a hand waste in the inner flexible container 12 will be forced out of the open top end 14 and into the waste container 42. This step is continued until the waste has been removed from the inner flexible container 12 as shown in Fig. 5d.
In a fourth step, as shown in Fig. 5e, the closed bottom end 16 is pulled back. This step is facilitated by allowing a person to catch the grip section 26 and pull the closed bottom end 16 backwards. The fourth step is completed when the closed bottom end 16 is returned to the starting position as shown in Fig. 5f. From this position the emptied waste receptacle 10 can be removed from the waste container 42 and returned to a position of normal use. It should be noted that the rigid outer container 18 is maintained in a substantially fixed position during the emptying steps as shown in Fig. 5c - Fig. 5f.
Fig. 6 is to illustrate one embodiment of a waste receptacle 10 in accordance with the invention. The rigid outer container 18 conceals the inner flexible container and only the grip section 26 is visible. A handle 46 is attached to the rigid outer container 18 to facilitate carrying the waste receptacle 10 to a waste container. A plurality of orifices 48 are formed in the rigid outer container 18. In various embodiments the waste receptacle 10 has a rectangular cross section, as shown in Fig. 6. Normally the shape and outer dimensions of the inner flexible container 12 correspond to the shape and inner dimensions of the rigid outer container 18.
As described above properties of the material of the inner flexible container 12 have an impact on the function. It could also be appropriate to select different dimensions, mainly thickness, over different sections of the inner flexible container 12. One important property of the material is the hardness defined as the material's resistance to permanent indentation using so called durometer scales. The diagram of Fig. 7 shows different combinations of thickness and hardness defined as a suitable area of properties depicted by a hatch fill. Thickness T of the material is shown on the X axis and hardness H on the Y axis. Hardness is defined in a durometer A scale. Suitable materials for the inner flexible container 12 are thermoplastic elestomers, silicones and rubber.
A preferred hardness is in an interval of Shore A 50-85 in combination with a thickness in an interval of 0,5-6 mm. When using a material having a thickness of 1,5-5,0 mm an appropriate hardness is Shore A 50. A thinner material such as in the interval of 0,5-2,0 mm preferably is combined with a harder material, such as one with a hardness of Shore A 85. The thicker the material the less Shore A value.
While certain illustrative embodiments of the invention have been described in particularity, it will be understood that various other modifications will be readily apparent to those skilled in the art. Accordingly, the scope of the claims should not be limited by the preferred embodiments set forth in the examples, but should be given the broadest interpretation consistent with the description as a whole.

Claims

A reusable waste receptacle (10) comprising an inner flexible container (12) having an open top end (14) and a closed bottom end (16), and a rigid outer container (18), characterised in
that a collapsible section (20) is provided between said open top end(14) and said closed bottom end (16),
that said open top end (14) is enclosed by an attachment section (22), and
that a rigid supporting collar (24) is arranged to attach said attachment section (22) to said rigid outer container (18).
A reusable waste receptacle (10) as claimed in claim 1, wherein said rigid supporting collar (24) forms a closed curve.
A reusable waste receptacle (10) as claimed in claim 1, wherein said rigid supporting collar (24) is arranged inside said inner flexible container (12) to press said inner flexible container (12) against an inside surface of said rigid outer container (18).
A reusable waste receptacle (10) as claimed in claim 1 or claim 2, wherein the material of said inner flexible container (12) has a hardness of Shore A 50-85.
A reusable waste receptacle (10) as claimed in claim 4, wherein the thickness of inner flexible container (12) is 0,5-5,0 mm.
A reusable waste receptacle (10) as claimed in claim 4 or claim 5, wherein a larger thickness of said inner flexible container (12) is combined with a material of said inner flexible container (12) having lower Shore A hardness value.
A reusable waste receptacle (10) as claimed in claim 4, wherein a thickness of said inner flexible container (12) of 0,5-2,0 mm is combined with a hardness of the material of said inner flexible container (12) of approximately Shore A 85.
A reusable waste receptacle (10) as claimed in claim 4, wherein a thickness of said inner flexible container (12) of 1,5-5,0 mm is combined with a hardness of the material of said inner flexible container (12) of approximately Shore A 50.
A reusable waste receptacle (10) as claimed in claim 4 or 5, wherein the hardness of the material in the inner flexible container (12) and the thickness is combined to provide a higher stability at the attachment section (22) and at the bottom end (16) and a higher flexibility at the collapsible section (20).
A reusable waste receptacle (10) as claimed in claim 1, wherein said rigid supporting collar (24) is provided with a plurality of hollow extensions (28) fitting in apertures in said attachment section (22) of said inner flexible container (12) and in apertures of said rigid outer container (18).
A reusable waste receptacle (10) as claimed in claim 10, wherein a pin (30) is formed to be pressed into said hollow extensions (28) so as to lock said inner flexible container (12) in a fixed position in said rigid outer container (18).
A method of emptying a reusable waste receptacle (10) comprising an inner flexible container (12) having an open top end (14) and a closed bottom end (16), and a rigid outer container (18), characterised by pressing said closed bottom end (16) towards and past said open top end (14) while maintaining said open top end (14) in a fixed position in said rigid outer container (18), and
pulling said closed bottom end (16) towards and past said open top end (14) while maintaining said open top end (14) in a fixed position in said rigid outer container (18).