This invention relates to a method and apparatus for cleaning collapsible containers having wire loop frames to hold the containers in an expanded configuration.
Collapsible containers having spring loop frames are shown in U.S. Pat. Nos. RE37,924, 5,964,533 and 6,527,136 are used for laundry and other storage items, while collapsible containers shown in U.S. Pat. Nos. 5,664,596 are used as children's play structures, among other things. Other, larger containers can use spring-loop frames to form tents, as illustrated by U.S. Pat. Nos. 5,411,046 and 5,778,915.
These collapsible containers have fabric sides held taut by spring loop frames. The fabric becomes soiled with use of the container and thus the container must be cleaned or discarded. Cleaning is a problem because the expanded spring loop frame makes the container too bulky to fit in a washing machine. The containers are collapsed by coiling the springs into overlapping loops which are resiliently urged to spring open into the expanded configuration, so it is undesirable to place the collapsed container in a washing machine. While it is not believed such containers have been washed, even if such a container is somehow placed in a washing machine the spring loop frame will rust if made of metal, and if the frame is made of plastic the plastic can degrade and possibly break under the hot washing water and agitation of the washing machine. There is thus a need for a way to clean the fabric of these collapsible containers which use spring loop frames.
One way to clean the fabric is to remove the spring loop frame from the container and clean the fabric separately from the spring loop frame. This is described in Published Patent App. US 2003/0189044 A1, Ser. No. 10/413925. But this patent requires each side of the container to be made of two panels with the spring loop frame placed between the two panels. It is expensive to make containers with two panels on each side to hold the spring loop frames. Further, removing and re-inserting the spring loop frames is difficult and time consuming, and the two layers of material allow debris to become trapped and collect. Moreover, some collapsible containers such as shown in
A container is provided with a spring loop frame that does not readily rust or break when placed in a washing machine and washed. The container with the spring loop frame is collapsed by coiling the frames into overlapping circles small enough to fit into the washing machine, and the collapsed container is placed into a water permeable bag or washing pouch. The bag is advantageously fastened to the container, but could be separable from the container. Preferably, but optionally, the bag is releasably fastened close, as by a drawstring, snaps, buttons, a zipper or other releasable fasteners. The bag and collapsed container are then placed in a washing machine and washed. The bag and collapsed container can be placed in a dryer for drying. Alternatively, the collapsed container can be removed from the bag and allowed to air-dry either in the collapsed or the expanded configuration.
There is thus advantageously provided an easy method and apparatus for cleaning the fabric of a collapsible container.
These and other advantages of the washable container will become apparent in view of the following drawings and in view of the disclosure herein, in which like numbers refer to like parts throughout, and in which:
a shows a collapsed container held by a drawstring;
b shows an expanded container with a drawstring;
The sides 12 of the container are covered with material. Depending on the use of the container the material can be solid fabric, mesh fabric, a polymer based material such as plastic, or other flexible materials that allow the folding of the container from an expanded configuration to a folded, collapsed configuration. The side panels 12 are typically made of a fabric such as Nylon or canvas, but other materials could be used. Preferably the side panels 12 are made of any washable material, with a cloth material capable of allowing water and air circulation being preferred, especially when the container 10 is for a hamper or laundry container. The materials are ideally selected to be of a type that is washable in a washing machine, preferably using hot water, but cold water washable material could also be used.
The container sides 12 can form flat panels, with three or more panels joined to form a container. But the sides 12 can be curved, as reflected by U.S. Pat. No. 5,038,812, the complete contents of which are incorporated herein by reference. The sides 12 can be joined together directly by using a common pocket 20 containing two frames 22, or by sewing adjacent pockets 20 together, or by placing a spacing strip (panel separator) 23 intermediate the adjacent pockets 20 along the vertical sides of the panels 12 as shown in U.S. Patent RE37,924, the complete contents of which are incorporated herein by reference. The bottom 14 is advantageously configured to provide a continuous juncture with the sides 12, but need not do so as the construction vary depending on how adjacent sides 12 are joined and on the use of the container 10. The bottom 14 advantageously is formed of the same material as the sides 12 and is joined to each of the sides 12 forming the container, at the lower end of the sides. Because the bottom 14 carries the weight of the contents and transfers that weight to the frame 22 and sides 12, the bottom may be made of more sturdy and durable material, or made of increased thickness in order to accommodate the increased weight. There is preferably an open top 16 to allow maximum access to the interior of the container 10. But a top could be added, with a closure such as a zipper, or with an opening in a partially closed top.
Advantageously the container 10 has four quadrilateral panels 12, sized to form a hamper for clothing, with an opening 18 comprising a smaller circle. Panels 12 about one foot wide and two feet high, with mesh or uniform sheets of material on the panels, are believed suitable for the hamper application. But different sized and shaped containers can be used, including tents and multiple bay containers as shown in Des. 433,810, the complete contents of which are incorporated herein by reference.
The frame 22 is preferably made of a material that does not rust or corrode during washing in a washing machine. A stainless steal or plastic is believed suitable. Alternatively, the frame 22 can be made of a material that rusts, such as carbon spring steel, in which case the spring frame is coated with a material to prevent rust and oxidization, such as a plastic coating, or a powder coating on the metal. A carbon spring steel frame 22 could be dipped in a plastic material to coat it. A carbon spring steel frame 22 could be galvanized or placed in a plastic tube to prevent rusting. The rusting is undesirable because it can be transferred to clothes during washing, or transferred to items placed in or abutting the container 10 or the pocket 20 containing the frame 22.
The spring frames 22 are typically formed as flat strips with one end 28 inserted into a slit in the pocket 20 and with the two opposing ends 28 of each strip being fastened together to form a continuous loop. Joinder mechanisms and methods such as welding, riveting, or crimping the overlapping ends in a deformable tube 30 are typically used. Referring to
It is desirable to apply a waterproof coating to the joined ends 28 if the frame 22 is made of a material that can rust because even if the sides of the frame are coated with a non-rusting material the cut ends can rust. This can be achieved by encasing the fastened ends 28 in a waterproof material 32 (
As shown in
The washing pouch 26 has an opening 27 of sufficient size to allow insertion and removal of the collapsed container 10, including the coiled frames 22, and the washing pouch 26 is dimensioned to accommodate the container 10 in its collapsed state as later described. The pouch 26 is small enough to fit into a washing machine, as discussed later.
Referring to
The next step includes inserting any handles 24 and the floor panel 50 in between any two of the adjacent overlying side panels 12, as shown in
The next step, shown in
These coils are generally circular and lie adjacent each other to form the collapsed configuration 29. Because the coils are resilient they tend to spring open in this configuration, and the pouch 26 must be selected of a material sufficiently strong to restrain the collapsed configuration 29 from expanding. Further, the material forming the washing pouch 26 must be sufficiently porous to allow water to flow through the washing pouch and wash the container 10 inside the washing pouch, and especially to wash the fabric on the side panels 12 contained in the washing pouch 26. Depending on the material of the side panels 12, the washing may be with hot or cold water, or both. Because the washing pouch 26 restrains the coiled frame 22, other items can be washed with the washing pouch and its collapsed container 10.
When washing is finished, the container 10 inside the washing pouch 26 is removed from the washing machine 50 and it can then be placed in a heated dryer 52. The flexible materials used on the panels 12 and washing pouch 26 are preferably selected to withstand the elevated drying temperatures of a tumble dryer. The materials are selected to withstand repeated washing and drying cycles. This includes not only the flexible material of panels 12, but the spring material forming frame 22. Rust from the frame 22 can stain the container 10, and any other garments in the washer and/or dryer, and may rub off on any items placed inside a washed container 10. Thus, it is desirable to entirely avoid any noticeable rusting of the frame 22 which is readily visible with the unaided eye, and especially desirably to avoid rust in any amount sufficient to visibly rub off onto other articles.
As an alternative to machine drying, after washing the collapsed container 10 can be removed from the washing machine 26 and allowed to air-dry inside the pouch. Preferably though the collapsed container 29 is removed from the washing pouch 26 and then expanded into either the flat, overlying panels of the partially collapsed configuration 25 for further drying, or further expanded to form the fully expanded container 10 and allowed to air dry.
The coiled spring frames 22 of the collapsed container 10 tend to expand and during the agitation of washing or the tumbling of drying, the collapsed container 10 may slip out of the container 10. In order to ensure the coiled springs do not slip out of the opening 27 of the washing pouch 26 during washing or drying it is desirable to secure the collapsed container 10 inside the washing pouch 26. This is preferably achieved by placing releasable fasteners 34 to hold the opening 27 of the washing pouch 26 closed, as shown in
In a preferred embodiment the releasable fastener 34 takes the form of a drawstring 35 encircling the opening 27, as shown in
Referring to
The washing pouch 26 need not be fastened to the container 10, but if it is not fastened the washing pouch is more readily separated from the container and lost. The size and shape of the washing pouch 26 relative to the collapsed container 10 is important and a user may attempt to use an inappropriately sized replacement bag for washing the collapsed container if the separated bag is lost. If the washing pouch 26 is too small then the frame 22 may be distorted so much during placement into the washing pouch that the frame is broken, cracked or otherwise damaged. The pouch 26 is thus about the same size and shape as the coiled, collapsed configuration 29. As the coiled frames 22 typically form circular loops, the pouch 26 preferably has a generally square shape.
The opening 27 of the washing pouch 26 is preferably about the diameter of the coiled frames 22 when the coils lay adjacent each other and form the minimum collapsed volume of the container. The opening 27 is preferably slightly smaller than the diameter of the collapsed coiled frames 22, because the frames can be distorted into an oval shape to insert them into the washing pouch 26. When the coiled frames 22 resume the circular shape inside the washing pouch, which shape is larger than the length of the opening 27, then the narrower opening helps retain the collapsed container inside the washing pouch 26. If the shape is rectangular and slightly too short, then the frame may be squeezed into an oval shape and resiliently urged out of the opening. If the shape is rectangular and not wide enough, then the collapsed shape 29 is again distorted into a slightly oval shape, but is restrained by the sides rather than being urged into or out of the opening to the pouch. Thus, if the pouch is not square in shape, it is preferably slightly deeper than it is wide so the oval shape does not urge the collapsed shape 29 out of the opening to the pouch.
The opening 27 and the dimensions of the washing pouch 26 can be slightly larger than the coiled and collapsed container 10, but preferably not too much larger. It is easier to store the coiled and collapsed frames in as flat a position as possible, because the uncoiling force is less than when the coils are partially expanded. Thus, the washing pouch 26 is preferably not too big, but is small enough to place the coils of frame 22 adjacent each other, and preferably in a substantially flat position. The washing pouch 26 is preferably dimensioned to achieve this configuration. The washing pouch provided with the prior art commercial embodiment of RE37,924 and as described as pouch 70 in that patent, has a usable size and dimension which achieves this substantially flat position.
The thickness of the pouch 26 is preferably small. A thickness to allow easy insertion of the collapsed container 29 into the pouch 26 is desired, but not much more as a larger thickness can allow the coiled frame 22 to expand and the more the frame expands the more force is needed to restrain the frame. Thus, the pouch 26 has a thickness about the same as the thickness of the coiled configuration 29.
An alternative embodiment is shown in
a-20b show a further embodiment in which a drawstring 35 encircles the middle of the container 10, extending through a drawstring pocket 40 formed in or formed on the material of two opposing panels 40. The drawstring pocket 40 is preferably on the outside or exterior of the container 10. When the panels 12 are laid flat and stacked on each other as in
In a further embodiment, the flat stacked, partially collapsed containers of
When the collapsed container 10 is removed from the washing pouch 26, the frame members 22 will bias the container 10 into its fully expanded state. Again, the fully expanded state of the preferred embodiment is that shown in
The method and apparatus are preferably applied to containers having multiple sides enclosing a contained space. But a single loop frame could be washed or cleaned using the present disclosure.
Referring to
The single panel 12 can be collapsed by twisting and coiling the frame into overlapping loops, with the straps 62 encircling portions of the collapsed frame loops before being fastened together to confine the single panel 12 into the collapsed configuration as shown in
Preferably, the single panel 12 has a shape with two opposing substantially straight sides and a strap 62 at or adjacent opposing ends of each substantially straight portion 68. The substantially straight portion 68 between the straps 62 is much longer than the tube 66 and provides a more stable drying frame. When the straps 62 are joined to bow the single panel into the curved drying rack the two straps help maintain the straight portion 68 and help prevent the panel from unacceptable distortion.
Further, the spacing of the straps 62 is preferably such that the ends of the straps are fastened 90 degrees apart on the coiled and collapsed frames. Thus, each strap 62 can encircle and restrain the collapsed configuration at 90 degrees relative to the other strap. That provides a much more stable restraint.
If desired, one or several loops 70 can be fastened to the material forming the panel 12 to allow one or both of the straps 62 to pass through the material. In addition to the loops 70 can form
The foregoing is considered as illustrative only of the principles of the invention. Furthermore, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described.
This application claims the benefit under 35 U.S.C. § 119(e), of application Ser. No. 60/659,519, filed Mar. 8, 2005, the entire contents of which are incorporated herein by reference.
Number | Date | Country | |
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60659519 | Mar 2005 | US |