The present invention relates to packaging, and more particularly to point-of-sale product packages.
A wide variety of products intended for retail sale are packaged in packaging that includes plastic components. One of the most common forms of plastic point-of-sale packages is a blister package. A typical blister package includes a shaped plastic blister that forms the main cavity of the package and a backer panel that closes the cavity. The backer panel is often sealed to the blister, for example, by adhesive to enclose the product within the cavity. The backer panel may be formed from paperboard, plastic, aluminum or other similar materials. Because of the use of a paperboard backer panel, a blister package has the potential to be a relatively low cost packaging solution. The amount of plastic used to contain the product is relatively small and the backer panel can be sized to provide ample space for printed content. A conventional blister package includes a plastic component (or blister) having a peripheral flange that is face-sealed to a paperboard card or sandwiched between a pair of paperboard panels. In some cases, the two paperboard panels are a single piece of paperboard folded along an edge. In other cases, they are two separate panels. Various attempts have been made to provide recloseable blister packages. In one type of recloseable blister package, the blister is formed with an integral door. With this construction, the blister remains sealed to the paperboard and a door within the blister is opened. In another type of recloseable blister package, the blister is secured to the paperboard in a way that allows the blister to pivot away from the paperboard. For example, one edge of the blister may be permanently sealed to the paperboard and the other three edges may be joined only by a peelable adhesive. This allows the blister to open while remaining joined to the paperboard. In another example, one edge of the blister may be adhered to the paperboard while another portion of the blister is snap-fitted to a portion of the paperboard leaving at least a portion of the blister without an adhesive or mechanical connection to the paper board. The snap-fit portion can be fitted or unfitted allowing the package to be opened and reopened a number of times. In yet another example, the paperboard panel closing the blister may include a door, such as a perforated region that can be opened to gain access to the interior of the blister.
Another common form of plastic point-of-sale package is a clamshell package. A typical clamshell package includes a pair of formed plastic parts (often “halves”) that are joined along a hinge. The parts can be closed about the hinge to entrap the product to be packaged. Clamshell packages vary dramatically in design and configuration. For example, some clamshell packages are sealed shut to protect the contents of the package until it is opened, while other clamshell packages are resealable. With sealed clamshell packages, it is often necessary to at least partially destroy the package to gain access to the contents. In a resealable configuration, the clamshell can be formed with contours that permit the two clamshell parts to be friction interfitted in a way that holds the parts together in a closed configuration about the packaged contents. It is not uncommon to incorporate paper or paperboard inserts into clamshell packages. For example, information and other content can be printed on an insert that is enclosed within the clamshell.
In some applications, a hybrid clamshell package is formed by securing paperboard panels or other similar materials around the peripheral edges of the clamshell. The hybrid package provides, among other things, the added advantage of additional space for additional printed content. Although it enjoys some benefits, the presence of the hinge in the clamshell presents a challenge to hybrid package construction. Conventional constructions provide two options for dealing with the hinge. In one type of construction, the hinge is trapped between the paperboard panels. This provides a strong package because the clamshell is joined to the paperboard around its entire periphery. However, because the hinge is positioned between the paperboard panels, opening and closing of the package forces the paperboard apart, which can cause the paperboard to buckle and tear near the hinge. This problem can be exacerbated with repeated opening and closing of the blister. The peeling and tearing of the paperboard can ultimately break the connection between the paperboard and the blister, which can weaken the package and impact its aesthetic appearance. The second type of hybrid construction includes paperboard panels that are shaped so that they do not entrap the hinge. This prevents the issues of buckling and tearing discussed above, but provides a somewhat weaker package because the clamshell and paperboard panels are not laminated along the hinge.
In order to overcome the issues associated with the weakening, buckling or tearing of the paperboard (as well as to provide other advantages), some hybrid clamshell packages have been developed to include multiple hinges. For example, a multiple hinge package is shown in U.S. Pat. No. 7,931,148 to Hansen. In these types of packages there is a hinge that allows the clamshell package to be secured together in paperboard and another hinge that allows the package to open and close without disturbing the paperboard.
There are a variety of types of composite packages in which the paperboard and plastic components are combined in different ways. For example, “book-style” composite packages are known to include an inner plastic clam shell that forms a compartment to contain the article(s) to be packaged and an outer paperboard cover that covers the clam shell. The clam shell and paperboard each include an integral “spine.” The spines are generally coextensive to allow the package to be opened and closed along one edge in a book-like manner. Book-style composite packages provide the benefits of being easily recloseable and relatively stable constructions, but they can be relatively expensive to manufacture. Further, the paperboard spine, which spans the thickness of the package, may be too flexible to provide confident registration between the clam shell portions, particularly after repeated opening and closing.
Packages without the coextensive paperboard and plastic spines have been developed to address several issues including the challenge presented by the book-style composite packages described above. These packages include hinged paperboard panels with openings that seat two opposing plastic components that meet to form a product cavity when the paperboard panels are folded together along the hinge.
Although existing composite packages are suitable for many applications, there remains a desire for a stable and easily reclosable package that is less expensive to manufacture and provides a wide range of packaging options.
The present invention provides a reclosable composite display package having a tray, a panel and a sliding cover. The tray and cover may collectively define a cavity to hold and display an article for sale. The tray and panel are arranged to cooperatively define a channel that slidably receives the cover. In use, the cover can be slidably moved within the channel to allow the package to repeatedly opened and closed. In one embodiment, the tray and panel are joined to one another and are configured to form the channel automatically as they are joined. For example, the tray and panel may be configured so that the panel is shaped to by interaction with the panel to form the channel.
In one embodiment, the channel is formed by interaction of the panel with the flange of tray. In one embodiment, the panel includes two sides that are joined together around the outer peripheral edge of the tray flange. The thickness of the tray flange may cause one side of the panel to bend slightly as the two sides of the panel close around the tray flange. The bending of the panel results in a channel being formed on one side of the tray flange. In one embodiment, the thickness of the tray flange is effectively increased by providing the tray flange with a rail. The rail may be located along the outer peripheral edge of portions of the tray flange. The flange may include a rail that interacts with and causes a portion of the panel to be spaced away from the tray flange to form the channel.
In one embodiment, channel guides are included to facilitate insertion of the cover into the channel. The channel guides may be flaps, notches, slits or perforations in the panel to allow a subtle separation from the tray flange for ease of inserting the cover in the channel. In one embodiment, the separation is caused by the rail or thickness of the peripheral tray flange. The ease of the start of the cover into the channel is due to the cover being in a position to engage the channel, or be woven into the channel guides, prior to encountering a ramp, if present, on the tray.
In some embodiments, the package may include additional features intended to ease the cover into place by providing a leading edge to the cover with a notch formed therein. Further, formation of the notch allows the leading corners of the cover to move through the channel toward the bottom end of the package and to seat in a closed position while avoiding or minimizing buckling, wrinkling or tearing of the panel material.
In some embodiments, the cover is snap-fitted to the tray by providing one or more pairs of ramps and corresponding depressions on the cover and tray that snap together to securely maintain the package in a closed position. The characteristics of the ramp and depression of the snap-fit elements, such as the number, size, shape, and length may vary to provide the desired resistance to close or undo engagement between the snap-fit elements.
In one embodiment, the package may include a hang hole and the tray flange may be configured to reinforce the hang hole. In this embodiment, the hang hole may be located toward the top of the package and the tray flange may be shaped to extend above the hang hole to reinforce the panels against tearing initiated at the hang hole. The tray flange may be shaped to extend completely around the hang hole, if desired.
The package may be constructed by assembling the panel and the tray. The cover may remain separate until the reclosable package is ready to be filled with articles for sale. The cover can be easily placed on the package without additional equipment or special skill by the individual filling the package. A large number of panel-tray assemblies can be nested together then boxed and shipped. Similarly, a large number of covers can be stacked together and boxed separately from the panel-tray assemblies. Due to the large number of covers that can be stacked and shipped in a relatively small box, the overall cost of shipping of the reclosable packages can be minimized.
The present invention provides a simple and inexpensive display package with a cover that slides along a channel formed by a tray and panel. The package is easily opened and closed by a consumer interested in gaining access to the packaged article(s). For example, the package allows a potential customer to inspect the packaged article(s) at the point of sale. It also allows a customer to more easily access article(s) once purchased. The package can be initially loaded with product and assembled without the need for expensive sealing equipment. The described benefits should not be interpreted to limit the invention in any way.
These and other objects, advantages and features of the invention will be more readily understood and appreciated by reference to the detailed description of the invention and the drawings.
A reclosable display package in accordance with an embodiment of the invention is shown in
In the illustrated embodiment, the package 10 is a composite package formed from a polymer tray, a polymer cover and a paperboard panel (or panels). For example, the tray 12 and cover 40 of the package 10 may be molded or thermoformed and are typically constructed from polyvinyl chloride (PVC) or polyethylene terephthalate (PET) or some other polymer. Although the tray 12 and cover 40 are typically transparent, translucent or clear, they may also be opaque, clouded or tinted any suitable color. For standard applications, the tray 12 and cover 40 are likely to have a thickness ranging between 12 and 30 gauge (i.e., 12 to 30 thousands of an inch) with a typical thickness of about 20 mils. The tray 12 and/or cover 40 may alternatively be manufactured from fully or partially recycled materials such as paper pulp material that is made at least in part from waste paper and is biodegradable. The tray 12 or cover 40 may be formed by molding pulp, such as wood pulp or other natural fiber pulp, into a desired shape.
The panel 30 can be constructed of paperboard material with 20 point paperboard being typical and may be manufactured from a recycled paper pulp product. Although the package 10 is well-suited for use with a panel 30 formed from a paper pulp material, the panel 30 may be manufactured from other materials, such as plastic, when desired. For example, the panel 30 may be thermoformed from a suitable plastic material, such as PVC or PET.
As shown in
In the illustrated embodiments, the tray 12 and cover 40 are separate elements. If desired, the tray 12 and cover 40 alternatively may be formed together from a continuous piece of material. For example, in this alternative embodiment, the tray 12 and cover 40 may be joined by small lands (not shown) of material that keep the two components together until the lands are broken. In use, the lands may function as a living hinge to allow the cover 40 to be folded over onto the tray 12. When the cover 40 is opened for the first time, the lands (not shown) may be broken by the user to allow the cover 40 to slide into the open position. The number, size, shape and configuration of the land (or lands) may be selected to balance the strength of the connection between the cover 40 and the tray 12 with the amount of force required to break the land(s) to initially open the package 10.
Although not shown, the package 10 may include one or more wafer seals (not shown) to provide a tamper-evident or tamper-resistant mechanism that seals the cover 40 in the closed position. For example, the wafer seal(s) may be self-adhesive stickers that can be placed over the edge of the cover 40 and the panel 30. The characteristics of the wafer seal(s) (e.g. substrate material and adhesive characteristics) may be selected so that it is difficult to separate the wafer seal(s) from the package.
In the cross-sectional view of
As best depicted in
The cover 40 may be secured or guided into position within the package 10 by providing stops or catches on the tray flange 14, on the cover flange 48 or both that would meet or snap into corresponding voids in the other flange 14 or 48. The meeting of the stops or catches with the corresponding voids provides tactile confirmation to the user of the package that the cover 40 is securely in place. Referring to the cross-sectional views of
Stops or catches without corresponding depressions may also be used and would aid in the positioning of the cover 40 by stopping on contact with a panel 30 or an edge of the tray 12. For example in
The cover 40 may include a tab 26 as shown in
Although the tray 12 and cover 40 of the illustrated embodiment are generally rectangular, they may vary in shape from application to application as desired. For example, the general shape of the inner or concave portion 22 of the tray 12 that serves as a cavity 20 is rectangular, but may vary depending upon the shape of the article(s) to be packaged or the desired package aesthetics. Similarly, the panel 30 and or panel sides 33 and 34 may have sides or flaps with openings of different sizes or shapes and the two parts of the panel 30 or the panel sides 33 and 34 are not required to be identical. For example, in
Additional features intended to ease the cover 40 into place include a leading edge 42 of the cover 40 having a notch 44 formed therein. Formation of the notch 44 allows the extended, leading corners 46 of the cover 40 to move through the channel 18 toward the bottom end of the package and to seat in a closed position and avoid or minimize buckling, wrinkling or tearing of the panel material. These features of the leading edge 42 are depicted in
As shown in
In another embodiment depicted in
As noted above and in
The use of directional terms is merely an expedient to facilitate disclosure with reference to the illustrations and should not be interpreted to limit the invention to packages of any specific orientation(s).
The above description is that of current embodiments of the invention. Various alterations and changes can be made without departing from the spirit and broader aspects of the invention as defined in the appended claims, which are to be interpreted in accordance with the principles of patent law including the doctrine of equivalents. This disclosure is presented for illustrative purposes and should not be interpreted as an exhaustive description of all embodiments of the invention or to limit the scope of the claims to the specific elements illustrated or described in connection with these embodiments. For example, and without limitation, any individual element(s) of the described invention may be replaced by alternative elements that provide substantially similar functionality or otherwise provide adequate operation. This includes, for example, presently known alternative elements, such as those that might be currently known to one skilled in the art, and alternative elements that may be developed in the future, such as those that one skilled in the art might, upon development, recognize as an alternative. Further, the disclosed embodiments include a plurality of features that are described in concert and that might cooperatively provide a collection of benefits. The present invention is not limited to only those embodiments that include all of these features or that provide all of the stated benefits, except to the extent otherwise expressly set forth in the issued claims. Any reference to claim elements in the singular, for example, using the articles “a,” “an,” “the” or “said,” is not to be construed as limiting the element to the singular.
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