This invention relates generally to flexible sheet containers. More particularly, the present invention relates to dispensing flexible sheet containers that are refillable and to methods for feeding and refilling the flexible sheets.
Flexible sheet containers are well known and come in a variety of shapes and sizes. Portable flexible sheet containers, such as baby wipes containers, cleaning towels containers, and the like are popular for their mobility. Dispensing versions of these containers are particularly popular for their ease of use. They are convenient in situations where a user needs to quickly and repeatably grab wipes or towels. For example, when a messy spill occurs, it is desirable for a user to quickly and easily grab successive cleaning towels as needed while cleaning the spill. In other situations it may be desirable for a user, such as a parent changing a child's diaper, to be able to grab successive wipes with minimal complexity. It may be inconvenient and time consuming to peel-off or otherwise manually separate the towels or wipes.
Refillable versions of flexible sheet containers are also popular. These containers allow a user to save the expense of purchasing a new container along with each new packet of flexible sheets. Further, they reduce waste, since many containers may be refilled numerous times. They are also economical for carrying fewer amounts of wipes, such as is the case with refillable mini-packets, because replacement sheets can generally be purchased in bulk for less per sheet than in smaller quantities.
With many of these dispensing containers, it is often necessary to feed a leading sheet of a stack of sheets into the dispenser. This may be necessary, for example, when refilling sheets. It may also be necessary to feed a leading sheet at other times, such as when opening a new container with pre-filled, but not pre-fed sheets. Further, sheets sometimes tear during dispensing. They may also jam or otherwise fail to dispense properly. It is necessary in these instances to re-feed a leading sheet.
The process of feeding a leading sheet in many of the existing containers entails a user removing a cover to gain access to an underside of the dispenser. For example, a user may need to push or “feed” a leading sheet from underneath through the dispenser portion of the container. With other existing containers, a user may need to thread a finger through a tight orifice to grab a leading sheet. A user may also need to use a tool to feed a flexible sheet through an orifice. These options are not desirable, particularly for portable containers or in situations where a user needs quick access to additional sheets.
The present invention provides a flexible sheet dispensing container that allows a user to quickly and easily feed a leading sheet. It effectively dispenses a single sheet at a time and also permits finger access to the storage area of the container through the dispenser opening as needed to feed a leading sheet. This permits the user to quickly and easily feed a leading sheet into the dispenser and then proceed with dispensing sheets. These advantages are appropriate for a variety of dispensing containers from relatively inexpensive portable wipes containers to larger and more expensive cleaning towel dispensers.
In one embodiment, a flexible sheet container according to the present invention includes a container having a base portion that includes a storage area and a top covering the base portion. The top is preferably movable with respect to the base for allowing the sheets to be refilled or replaced. The top includes an opening into the storage area through which the individual sheets are dispensed. A pair of opposing flaps is attached to the top that together further define the dispensing opening. The flaps are pivotally mounted to the top, and according to one aspect of the invention, are mounted via living hinges. The pivoting flaps allow a user to access the storage area with their fingers and to feed a leading sheet through the opening.
According to another aspect of the invention, the flaps only pivot within the flexible sheets storage area. According to a further aspect, the container includes stops for limiting the flaps from rotating upward beyond an outer plane of the top. In yet another aspect of the invention, the flaps include complementary notches at their distal ends that form the dispensing opening. Other aspects of the invention include methods for feeding a leading sheet and for refilling sheets.
The invention will be described in detail in the following description of preferred embodiments with reference to the following figures wherein:
The invention may be embodied in various forms. As shown in
The top 14 defines a dispenser opening 20 that permits flexible sheets stored in storage cavity 18 to be dispensed. The top 14 includes a lid 21 pivotally attached to the top 14, which is movable between a closed position (not shown) for covering dispenser opening 20 and an open position for exposing the dispenser opening 20. The lid 21 may include snap fit tabs 27 that engage projections 29 on cover 14 in the closed position. The base portion 12 and top 14 shown in these figures are illustrated according to one embodiment having an aesthetically pleasing contour. However, such contouring is not necessary and a multitude of alternative contours could be used to perform equally well.
The top 14 also includes a pair of opposing flaps 22, 24 pivotally connected to top 14. The flaps 22, 24 according to this embodiment generally have a primary range of motion located within storage cavity 18. As shown in
Each opposing flap 22, 24 generally includes a first end 26, 28, which is proximate to top 14 and is pivotally connected thereto. Each flap 22, 24 also includes a second end 30, 32 opposite the first or proximate end 26, 28. The second end 30, 32 of each flap 22, 24 extends toward dispensing opening 20 and opposes the second end of the other flap. Thus, second ends 30, 32 are distal from the pivotal connection to top 14 at corresponding proximate end 26,28. The distal ends 30, 32 complement each other and together define dispensing opening 20. According to one embodiment, each distal end 30, 32 includes a U-shaped notch 34, 36 formed therein. As discussed below, when a flexible sheet is fed into dispensing opening 20, flaps 22, 24 overlap at their distal ends 30, 32 and U-shaped notches 34, 36 define a substantially circular orifice as dispensing opening 20.
As shown in
The first stop surface 46, 48 of each flap 22, 24 is disposed on proximate end 26, 28 near living hinge 38, 40. Accordingly, each first stop surface 46, 48 rotates along with the corresponding flap 22, 24. Each first stop surface 46, 48 is oriented parallel to its respective living hinge 38, 40, and therefore rotates in a direction perpendicular to the respective living hinge 38, 40 along with the corresponding flap 22, 24. Each second stop surface 50, 52 is disposed on top 14 in a position proximate to a respective one of the living hinges 38, 40, and is parallel to and opposite of a corresponding one of first stop surfaces 46, 48.
As shown in
The stops 42, 44 according to one embodiment are integrally formed in the geometry of flaps 22, 24 and top 14 through an injection molding process. Such a manufacturing process allows first stop surfaces 46, 48 to be formed in the geometry of corresponding flaps 22, 24, and second stop surfaces 50, 52 to be formed in the geometry of top 14. It also allows for hinge 19 to be integrally formed with top 14 and base portion 12 for pivotally connecting the top to the base portion. As such, base portion 12 and top 14 are made from an injection molded plastic, such as polypropylene. Injection molding further allows living hinges 38, 40 to be integrally formed from areas of material with reduced thickness that each connects a corresponding flap 22, 24 to cover 14.
Such a manufacturing process provides many advantages beyond integral formation of many components of the container. The use of a molded plastic material, such as polypropylene, permits flexibility in flaps 22, 24. Such flexibility provides benefits during dispensing of sheets as discussed below. Further, as shown in
In operation, container 10 according to one embodiment permits a user to easily add flexible sheets to the container, to feed a leading sheet through dispenser opening 20, and to thereafter dispense sheets. As shown in
After the user grabs leading sheet 60, he feeds the sheet by pulling it upward through opening 20. As this occurs, flaps 22, 24 rotate upward along with leading sheet 60, as shown in the transition between
To dispense a sheet, a user pulls leading sheet 60, which will be withdrawn in a compressed state through circular dispensing opening 20. The leading sheet 60 is compressed at the location of opening 20 and is generally uncompressed above and below opening 20. As sheet 60 is withdrawn, the first stop surfaces 46, 48 of stops 42, 44 make contact with second surfaces 50, 52 while flaps 22, 24 attempt to follow sheet 50 and rotate upward due to frictional engagement. The stops 42, 44 restrict rotation of flaps 22, 24 beyond such a position. As leading sheet 60 continues to be withdrawn, distal ends 30, 32 of flaps 22, 24 are flexed upward. The use of a plastic material such as polypropylene permits flaps 22, 24 to act as spring arms and flex beyond the point of engagement by stops 42, 44, as shown in FIG. 10. In a flexed condition, distal ends 30, 32 of flaps 22, 24 pull downward on leading sheet 60 and a subsequent sheet connected thereto as it enters opening 20. The downward pull on the sheets assists with dispensing of the sheets and reducing loss of fluids impregnated in the sheets, as discussed below. Geometry, such as ridges 27, 29 on each flap 22, 24, may reinforce the flaps as needed to fine tune the amount of flexibility in the flaps.
Flexibility and the spring arm action of flaps 22, 24 assist with the dispensing of sheets retained in a connected stack, such as stack 62. Connected stack 62 may include overlapped and interfolded sheets as known in the art that are stacked to encourage subsequent sheets to follow each other during dispensing. With such a stack, pulling leading sheet 60 upward through dispensing opening 20 results in a subsequent sheet 61 being partially pulled through dispenser opening 20, which feeds the subsequent sheet. As leading sheet 60 clears dispenser opening 20, the flexed flaps 22, 24 act to pull subsequent sheet 61 back toward storage cavity 18. Further, because flaps 22, 24 are naturally angled downward as molded with angle 72, and because gravity acts to encourage the flaps 22, 24 downward, they are biased toward such an downward position. As such, flaps 22, 24 pull subsequent sheet 61 further downward toward storage cavity 18 after leading sheet 60 is dispensed. Partial retraction of subsequent sheet 61 into storage cavity 18 exposes less of the subsequent sheet outside of storage cavity 18, which reduces the amount of drying out of fluid that may be impregnated in stack 62. Rotating lid 21 to a closed position that covers dispensing opening 20 further limits such drying out, as lid 21 may form a seal between the lid 21 and top 14 that is substantially airtight.
The rotatable flaps 22, 24 assist in dispensing of the sheets and they provide a quick and easy way for a user to feed a leading sheet. Thus, a container according to the present invention has advantages for both feeding and dispensing of flexible sheets. With a single hand, and without opening cover 14, a user can quickly and easily feed leading sheet 60 with access through flaps 22, 24. A user may also continue dispensing leading sheet 60 as a natural continuation of feeding the sheet, and may then immediately follow-up dispensing subsequent sheets. If a supply of sheets is depleted, the present invention also permits a refill stack of sheets 62 to be quickly and easily installed.
To install a refill supply of sheets, a user rotates cover 14 to an open position shown in
While the present invention has been described in connection with the illustrated embodiments, it will appreciated and understood that modifications may be made without departing from the true spirit and scope of the invention. In particular, various numbers of flaps may be used that create various shapes and sizes of dispensing openings. Further, the container may be made in a variety of ways with a variety of materials, and may use different types of hinges. The container may also be used with a continuous stack of sheets having perforations between sheets, or a roll of sheets, or other such configurations.
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