Paperboard containers are commonly used in the quick-service food industry as well as various other industries as vessels for holding, transporting and storing food and other items. Such containers are commonly constructed from a flat blank and folded into a clamshell container having a tray portion and a cover portion. One problem with known containers is that once they are folded into shape and the sidewall flaps are glued or otherwise connected together to form the sidewalls of the tray portion and the cover portion, the containers are difficult to stack and nest together and/or require a significant amount wasted space during transport and storage. This is a result of the shape and configuration of the containers, which have formed sidewalls for both the tray portion and the cover portion. As a result, many quick-service food providers must utilize a significant amount of space for storage of the containers or leave the container blanks in their unformed state until ready for use and must spend time constructing the containers from the blanks.
Various other foldable paperboard containers are also often used in quick-service food industry. However, one problem with known foldable containers is that due to their foldable/collapsible construction, the container sidewalls are weakened along fold lines and can fail to maintain their upright configuration after unfolding and being formed into a container. As a result, food and other items can easily fall out of the containers, the sidewall can inadvertently collapse, and the containers can be easily deformed and difficult to hold and carry.
Accordingly, a need exists for a foldable container that can be formed from a unitary blank and easily and compactly stacked together with other similar containers after formation. Additionally, a need exists for a foldable container that can be configured from a folded state and maintain sufficient form and rigidity after formation.
The present invention is directed to a clamshell-style carton or container configured for holding food stuffs or other suitable items. The container can include a tray portion and a cover portion foldably connected to the tray portion. The container can be transitioned between a closed position where the cover portion overlies the tray portion, and an opened position where the cover portion is rotated away from the tray portion.
The tray portion of the container can include a bottom panel, opposing front and rear panels foldably connected to opposing edges of the bottom panel, and opposing side panels foldably connected to the remaining edges of the bottom panel. The tray portion can further include front and rear end flaps foldably connected to the lateral side edges of the front and rear panels, respectively. The front and rear end flaps can be connected to triangular fold flaps formed into the ends of the side panels in order to form an enclosed perimeter sidewall of the tray portion of the container.
The cover portion of the container can include a cover panel foldably connected to an upper edge of the rear panel of the tray portion, a front cover panel foldably connected to the opposing edge of the cover panel, and opposing cover side panels foldably connected to the remaining edges of the cover panel. The cover portion can further include front cover panel end flaps foldably connected to the later side edges of the front cover panel. The front cover panel end flaps can be connected to triangular fold flaps formed into the adjacent ends of the cover side panels in order to form a perimeter sidewall around the front and sides of the cover panel.
The container can be configured into the folded and flattened position by folding the side panels of the tray portion inward to overlie and be generally parallel to the bottom panel. As the side panels are folded inward, the triangular fold flap portions of the side panels that are connected to the front and rear end flaps can fold outward an overlie the remainder of the side panels. This can enable the front and rear panels of the tray portion to fold inward and overlie side panels and bottom panel of the tray portion to configure the tray portion into a fully folded and flattened configuration. The same procedure can be applied to the panels of the cover portion, where the cover side panels are folded inward, the triangular fold flaps are folded over and outward, and the front cover panel is folded inward to overlie the cover side panels and cover panel of the cover portion in order to configure the cover portion into a fully folded and flattened configuration. Once the tray portion and the cover portion have been fully folded, the container may be positioned into a folded and flattened position where the rear panel and the cover portion of the container are folded against and overlie the remainder of the tray portion of the container.
To unfold the container into a use position, the side panels of the tray portion can be lifted upward to cause the triangular fold flaps and front and rear end flaps to unfold and position the front and rear panels and side panels into a generally perpendicular configuration with respect to the bottom panel. The cover side panels can also be lifted upward relative to the cover panel in order to position the cover front panel and cover side panels into a generally perpendicular configuration with respect to the cover panel.
According to one embodiment, the front and rear end flaps of the tray portion, and the front end flaps of the cover portion, can include a lower terminal edge with a slightly outward angled orientation that can assist in creating a frictional, interfering, and/or engaging fit with the bottom panel and cover panel. This arrangement can assist the front, rear and side panels of the tray portion and cover portion to remain in an upright orientation when the container is unfolded into the use position.
According to one embodiment, the rear panel of the tray portion can include a height that is greater than the heights of the front panel and side panels of the tray portion. This configuration can enable the cover panel of the cover portion to be foldably connected directly to the upper edge of the rear panel, which can increase the overall structural rigidity of the container and facilitate the folding of the container into the fully folded and flattened position.
According to one embodiment, the rear end flaps of the tray portion can include an outer terminal edge with a curved profile portion and the cover side panels can include an outer terminal edge with a corresponding curved profile portion. The curvature of the curved profile portions may generally correspond to one another so that when the cover portion is folded over the tray portion to enclose the container, the curved profile portions provide a fully enclosed perimeter sidewall around the container. The curved profile portions may also provide additional structural rigidity to the container when transitioning between the open and closed positions.
Other aspects and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the accompanying drawing figures.
In the accompanying drawing, which forms a part of the specification and is to be read in conjunction therewith in which like reference numerals are used to indicate like or similar parts in the various views:
The invention will now be described with reference to the drawing figures, in which like reference numerals refer to like parts throughout. For purposes of clarity in illustrating the characteristics of the present invention, proportional relationships of the elements have not necessarily been maintained in the drawing figures.
The following detailed description of the invention references specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the scope of the present invention. The present invention is defined by the appended claims and the description is, therefore, not to be taken in a limiting sense and shall not limit the scope of equivalents to which such claims are entitled.
Referring to several figures, the present invention is directed toward a carton or container 10 capable of holding food stuffs and the like. Container 10 of the present invention may also be suitable for holding, storing and/or transporting any number of other products, materials or items depending on the particular desired use of container 10. As best shown in
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When container 10 is formed from a blank 100, end flaps 36 can also be folded away from front panel 28 and toward side panels 26 so that end flaps 36 overlie side panels 26 along the interior of cover portion 12. According to one embodiment, the terminal free lower edges 34b and 36b of each end flap 34 and 36 can have a slightly outward angled orientation which can assist in creating frictional, interfering, and/or engaging fit with said bottom panel 16 (for end flaps 34) and said top panel 24 (for end flaps 36). The outward angled configuration of lower edges 34b and 36b can assist front panel 20, rear panel 22, and side panels 18 of tray portion 12, and front panel 28 and side panels 26 of cover portion 14, to remain in an upright orientation when container 10 is unfolded into the use position.
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Similarly, end flaps 34 connected to rear panel 22 of tray portion 12 can optionally include an outer terminal edge 52 with a first curved edge profile portion 54 extending from hinge line 30. As shown in
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The end flaps 34 may optionally be sized to create an interference fit or near interference fit in order to create an increased amount of friction with the bottom panel 16. According to such an embodiment, as best shown in
In certain embodiments of the present invention, the foldable sidewall configuration of container 10 with end flaps 34 and 36 and triangular fold flaps 38 and 40 can also be configured in accordance with the design of the tray container disclosed U.S. patent Publication Ser. No. 15/806,207 (published as U.S. Patent Publication No. 2018/0127151), entitled “Tapered-Wall Four Corner Tray”, the entire disclosure of which is incorporated herein by reference.
Once all panels 18-20 and 26-28 have been raised away from bottom panel 16 and top panel 24, respectively, then container 10 is placed into its configured position and ready for use. Container 10 can also be placed back into its folded-flattened position by pushing end flaps 34 of tray portion 12 toward the front and rear panels 20 and 22 until they no longer contact bottom panel 16 and are free to fold under the front and rear panels 20 and 22 and allow side panels 18 to collapse. Similarly, the end flaps 36 of cover portion 14 can be pushed inward until side panels 26 are able to collapse against top panel 24.
As described above, once container 10 is placed into its configured position, it can be transitioned between an open position (see
From the foregoing, it will be seen that this invention is one well adapted to attain all the ends and objects hereinabove set forth together with other advantages which are obvious and which are inherent to the structure. It will be understood that certain features and sub combinations are of utility and may be employed without reference to other features and sub combinations. This is contemplated by and is within the scope of the claims. Since many possible embodiments of the invention may be made without departing from the scope thereof, it is also to be understood that all matters herein set forth or shown in the accompanying drawings are to be interpreted as illustrative and not limiting.
The constructions described above and illustrated in the drawings are presented by way of example only and are not intended to limit the concepts and principles of the present invention. Thus, there has been shown and described several embodiments of a novel invention. As is evident from the foregoing description, certain aspects of the present invention are not limited by the particular details of the examples illustrated herein, and it is therefore contemplated that other modifications and applications, or equivalents thereof, will occur to those skilled in the art. The terms “having” and “including” and similar terms as used in the foregoing specification are used in the sense of “optional” or “may include” and not as “required”. Many changes, modifications, variations and other uses and applications of the present construction will, however, become apparent to those skilled in the art after considering the specification and the accompanying drawings. All such changes, modifications, variations and other uses and applications which do not depart from the spirit and scope of the invention are deemed to be covered by the invention which is limited only by the claims which follow.
This application claims priority to U.S. Provisional Patent Application Ser. No. 62/713,266, filed on Aug. 1, 2018, to George Zeiler, entitled “Foldable Clamshell Carton,” the entire disclosure of which is incorporated herein by reference.
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Number | Date | Country | |
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62713266 | Aug 2018 | US |