DISPLAY PACK AND PACKAGING METHOD AND APPARATUS
A display pack for a consumer product is made of two sheets of corrugated cardboard and a clear plastic container with a flat insertion portion sandwiched between the cardboard sheets. The two cardboard sheets are adhered together in a peripheral area of the package by a heat-sensitive adhesive, and the corrugations of the cardboard sheets are crushed and flattened in the peripheral area. To seal the package, the peripheral area of the two cardboard sheets is subject to sufficient pressure to crush the corrugations inside the cardboard sheets and flatten them in that area. Heat is applied to the outer side of the cardboard sheets in the peripheral area and conducted to the adhesive material between the two sheets to activate the adhesive material. A sealer machine with a heated sealing press or parallel sets of heated rollers may be used to carry out the sealing process.
This application is a continuation of U.S. patent application Ser. No. 12/790,747, entitled DISPLAY PACK AND PACKAGING METHOD AND APPARATUS, filed May 28, 2010 which is a continuation of U.S. patent application Ser. No. 11/374,769, entitled DISPLAY PACK AND PACKAGING METHOD AND APPARATUS, filed Mar. 14, 2006, which claims priority to and the benefit of U.S. provisional application No. 60/711,024, filed Aug. 24, 2005, the entire contents of which are incorporated herein by reference.
BACKGROUND OF THE INVENTIONThis invention relates to product packaging, and in particular, it relates to packaging for products suitable for store merchandising.
DESCRIPTION OF THE RELATED ARTA first type of conventional packaging for consumer products, shown in
A second type of conventional packaging, shown in
A disadvantage of the second type of conventional packaging is that it sometimes lacks sufficient structural strength. Display packs are often transported in an assembly where a plurality of display packs are stood on their sides in a container with half-height walls (i.e. walls not as high as the packs themselves), and wrapped together to form a box-shaped bundle. When two or more of such bundles are stacked on top of each other, the weight of the top one is supported directly by the packs in the bottom bundle. The packs therefore must have sufficient structural strength and rigidity to prevent them from bending. The lack of physical strength also makes it difficult to make larger packages (e.g. larger than 10 by 15 inches), or to pack heavier items.
SUMMARY OF THE INVENTIONAccordingly, the present invention is directed to a display pack and packaging method that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
Additional features and advantages of the invention will be set forth in the descriptions that follow and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims thereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention provides a display pack for a product including a first and a second corrugated cardboard sheet, at least one cardboard sheet defining at least one opening; at least one container having a flat insertion portion and a chamber portion for holding the product, the insertion portion being sandwiched between the two cardboard sheets and the chamber portion protruding from a plane of the cardboard sheets via the opening; and an adhesive material between the first and the second cardboard sheets in at least a peripheral area of the two cardboard sheets to join the two cardboard sheets together, wherein the first and second cardboard sheets are crushed in the peripheral area with reduced air gaps in the corrugations. The adhesive material may be a heat-sensitive adhesive material.
In another aspect, the present invention provides a method of making a display pack including the steps of providing a first and a second corrugated cardboard sheet, at least one cardboard sheet defining at least one opening; providing at least one container having a flat insertion portion and a chamber portion for holding the product; placing the insertion portion between the two cardboard sheets so that the chamber portion protrudes from a plane of the cardboard sheets via the opening; applying an adhesive material between the first and second cardboard sheets in a peripheral area of the cardboard sheets; and applying a pressure to the peripheral area of the two cardboard sheets to crush the corrugations inside the cardboard sheets in the peripheral area. The adhesive material may be a heat-sensitive adhesive material, in which case the method further includes applying heat to the heat-sensitive adhesive to activate it.
In another aspect, the present invention provides a device for sealing a display pack, which includes an upper and a lower platen, at least one of the platens having a rim and a recessed central area; and a drive mechanism for driving the platens, the drive mechanism capable of applying a force of 25 tons or more at the platens. The platens may be heated.
The present invention provides another device for sealing a display pack, which includes a transport mechanism for transporting a package; one or more sets of rollers disposed along a path of the transport mechanism, each set of rollers including an upper row and an opposing lower row of rollers, the upper and lower rows of rollers disposed at a tapering angle with respect to each other; and a press for applying a force to at least one of the upper and lower rows of each set of rollers. The device may include two or four sets of rollers. The rollers may be heated.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
To seal the package, the peripheral areas 11a, 12a of the two overlaying cardboard sheets are subject to a sufficient amount of pressure to crush the corrugations inside the cardboard sheets and flatten them in that area. Heat is applied, either simultaneously with or subsequent to the application of pressure, to the outer side of either one or both cardboard sheets in the peripheral area. Because the corrugations inside the cardboard are crushed and the air gaps are substantially eliminated, the crushed cardboard becomes a better heat conductor. Sufficient heat can be conducted from the outer side to the inner side where the heat-sensitive adhesive has been applied to activate the adhesive and seal the package. In one preferred embodiment, the width of the crushed peripheral areas is approximately 0.5 inches. Any suitable sealing width may be used, but it is desirable that the adhesive not be adhered to the insertion portion of the container, so that the container can be easily removed from the packaging for recycling. This is desirable because it facilitates recycling of the container. In addition, the container may be made as a re-usable container, and easy removal may facilitate re-use in such a case.
Many types of sealer machines may be used to carry out the sealing process, some of which are described below. The first is a sealer machine with a heated sealing press. As shown in
Preferably, the force or pressure applied by the platens is such that the cardboard sheets are crushed to up to approximately 50% of their original thickness. Generally speaking, within certain limits, higher pressure results in thinner crushed cardboard sheets, which in turn results in increased heat transfer rate and therefore reduced heat application time required to properly activate the adhesive. The optimum pressure may also depend on the type of the cardboard used. The temperature of the heated surface may be approximately from 100 to 500 degrees F., which is a typical temperature used in the second conventional packaging technique. Those of ordinary skill in the art will be able to find acceptable or optimum pressure, temperature and process time conditions for the particular cardboard used without undue experimentation.
In one particular example, the package uses two sheets of 200 lb test E-flute cardboard coated with a heat sensitive blister card coating as an adhesive, has a size of 10 inches by 15 inches and a sealed width of 0.5 inches. The sealing press has a rim on both platens and both surfaces are heated to a temperature of 300 degrees F. The force on the platens is 25 tons. The pressure and heat was applied simultaneously for 3 seconds.
The sealer machine suitable for the above application may be a machine used to seal a conventional package of the second type (as shown in
In addition to the peripheral areas, the corrugated cardboards 11 and 12 may be crushed and sealed in certain interior areas (spot sealed) to provide additional security, especially for larger packages and packages with multiple separate plastic containers. To achieve spot sealing, as shown in
A second type of sealer machine useful for carrying out the sealing process is a sealing press similar to the one described above, but instead of heated platen(s), hot air or a hot steam is applied to the heat-sensitive adhesive to heat it. The hot air or steam is supplied from the side by a tube or pipe 25 as shown in
A third type of sealer machine according to an embodiment of the present invention is shown in
Similar to the platens shown in
The pair of roller sets shown in
The package in
The packaging technique according to embodiments of the present invention has the following advantages. The packages are more secure and harder to tear from the edge and the center than packages made by the first conventional method described above which uses hot melt glue. The sealing quality is also more consistent than seals using glue because the drying (cooling) speed and the placement of the hot melt glue are hard to control. Packages made with the present technique are also aesthetically more appealing than packages made by the first and second conventional techniques in that the corrugations of the cardboard sheets are less visible when viewed from the side edges (e.g. the bottom side) due to the crushing. Compared to the second conventional packaging technique, packaging made with the present method is stronger because it uses two cardboard sheets. As a result, the packages can be made larger and to pack heavier items, and multiple packages can be stacked in bundles. For example, the packages can be as large as 24×24 inches (whereas the second conventional type of packages are typically up to 14×14 inches) and can be used to pack items as heavy as 10 to 20 lbs. Also, the second type of conventional packages have a tendency to warp because the two sheets are of different materials. Packages according to the present invention are also more environmentally friendly because unlike the cardboard used in the present technique, the flat sheet of paper used in the conventional method uses less post-consumer recycled material. The present sealing technique is also faster than the process used in the second conventional technique.
Although the above-described embodiments are most advantageous when used in combination with a heat-sensitive adhesive, the crushing technique described above may also be applied when a regular, non-heat-sensitive adhesive is used. Such a package has the advantages that it is harder to open and tear from the edge than packages made by the first conventional method described above because the corrugations are crushed in the edge areas. It is also aesthetically more appealing than packages made by the first and second conventional techniques in that the corrugations of the cardboard sheets are less visible when viewed from the side edges due to the crushing.
It will be apparent to those skilled in the art that various modification and variations can be made in the display pack and packaging method of the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention cover modifications and variations that come within the scope of the appended claims and their equivalents.
Claims
1. A display pack for a product, comprising:
- a first and a second overlaying corrugated cardboard sheets, the first cardboard sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second cardboard sheet having a second upper facing, a second lower facing and a second inner corrugated member with second corrugations and second air gaps between the second upper and second lower facings, the first and second overlaying corrugated cardboard sheets forming a layered structure having an outer peripheral edge and an original thickness, at least one of the first and second cardboard sheets defining an opening;
- at least one container having a flat insertion portion and a chamber portion for holding the product, the insertion portion having an outer edge and being sandwiched between the first and second cardboard sheets and the chamber portion protruding from a plane of the cardboard sheets via the opening, the overlaying cardboard sheets having at least one peripheral area extending inwardly from the outer peripheral edge to an inner area between the at least one peripheral area and the opening; and
- an adhesive between the first and the second corrugated cardboard sheets in the at least one peripheral area to adhere the two corrugated cardboard sheets,
- wherein the inner area includes at least one uncrushed area with substantially the original thickness and at least one crushed area in which the first and second air gaps therein are substantially eliminated, and
- wherein the at least one peripheral area includes at least one crushed area in which the first and second air gaps therein are substantially eliminated.
2. A display pack of claim 1, wherein the first and second corrugated cardboard sheets are formed from a folded single sheet of corrugated cardboard.
3. A display pack of claim 1, wherein the at least one crushed area of the peripheral area includes a portion of the outer peripheral edge and extends inwardly from the outer peripheral edge about one-half inch to an inner boundary that extends generally parallel to the outer peripheral edge.
4. A display pack for a product, comprising:
- a first and a second overlaying corrugated cardboard sheets, the first cardboard sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second cardboard sheeting having a second upper facing, a second lower facing and a second inner corrugated member with second corrugations and second air gaps between the second upper and second lower facings, the first and second overlaying corrugated cardboard sheets forming a layered structure having an original thickness, an outer peripheral edge and first and second outer surfaces, each of the first and second cardboard sheets defining an opening, the overlaying cardboard sheets having at least one peripheral area extending inwardly of the outer peripheral edge to an inner boundary and an inner area between the at least one peripheral area and the openings;
- at least a first container and a second container, each container member having a flat insertion portion and a chamber portion, each insertion portion having an outer edge and being sandwiched between the first and second cardboard sheets and each chamber portion protruding from a plane of the cardboard sheets via a respective opening; and
- an adhesive between the first and the second corrugated cardboard sheets in at least a portion of the at least one peripheral area to adhere the two corrugated cardboard sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first and second air gaps therein to a thickness less than the original thickness.
5. A display pack of claim 4, wherein the two container members are formed from a single piece of plastic.
6. A display pack of claim 4, wherein the at least one peripheral area is crushed to form a depressed area on at least one of the first and second surfaces of the display pack.
7. A display pack of claim 4, wherein the depressed area is only on the first surface of the display pack.
8. A display pack of claim 4, wherein the depressed area is only on the second surface of the display pack.
9. A display pack of claim 4 having a first depressed area on the first surface and a second depressed area on the second surface.
10. A display pack of claim 4, wherein the at least one crushed peripheral area includes a portion of the outer peripheral edge and extends inwardly from the outer peripheral edge about one-half inch to the inner boundary which extends generally parallel to the outer peripheral edge.
11. A display pack of claim 4, wherein the first and second corrugated cardboard sheets are formed from a folded single sheet of corrugated cardboard.
12. A display pack for two or more products, comprising:
- a first and a second overlaying corrugated cardboard sheets, the first cardboard sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second cardboard sheeting having a second upper facing, a second lower facing and a second inner corrugated member with second corrugations and second air gaps between the second upper and second lower facings, the first and second overlaying corrugated cardboard sheets forming a layered structure having an original thickness, an outer peripheral edge and first and second outer surfaces, at least one of the first and second cardboard sheets defining two or more openings, the overlaying cardboard sheets having at least one peripheral area extending inwardly of the outer peripheral edge to an inner boundary and at least one inner area between the at least one peripheral area and at least one of the openings;
- at least one container having a flat insertion portion and two or more chamber portions, the insertion portion having an outer edge and being sandwiched between the first and second cardboard sheets and each chamber portion protruding from a plane of the cardboard sheets via a respective opening; and
- an adhesive between the first and the second corrugated cardboard sheets in at least a portion of the at least one peripheral area to adhere the two corrugated cardboard sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first and second air gaps therein to a thickness less than the original thickness.
13. A display pack for products, comprising:
- a first and a second overlaying corrugated cardboard sheets, the first cardboard sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second cardboard sheeting having a second upper facing, a second lower facing and a second inner corrugated member with second corrugations and second air gaps between the second upper and second lower facings, the first and second overlaying corrugated cardboard sheets forming a layered structure having an original thickness, an outer peripheral edge and first and second outer surfaces, at least one of the first and second cardboard sheets defining two or more openings, the overlaying cardboard sheets having at least one peripheral area extending inwardly of the outer peripheral edge to an inner boundary and an inner area between the at least one peripheral area and at least one of the openings;
- two or more containers, each container having a flat insertion portion and a chamber portion, each insertion portion having an outer edge and being sandwiched between the first and second cardboard sheets and each chamber portion protruding from a plane of the cardboard sheets via a respective opening; and
- an adhesive between the first and the second corrugated cardboard sheets in at least a portion of the at least one peripheral area to adhere the two corrugated cardboard sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first and second air gaps therein to a thickness less than the original thickness.
14. A display pack for a product, comprising:
- a first and a second overlaying sheets, the first sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second sheet comprising a sheet of paper, the first and second overlaying sheets forming a layered structure having an original thickness, an outer peripheral edge and first and second outer surfaces, the first sheet defining a first opening, the second sheet defining a second opening, the overlaying sheets having at least one peripheral area extending inwardly of the outer peripheral edge to an inner boundary and an inner area between the at least one peripheral area and the openings;
- a first container having a first insertion portion and a first chamber portion, a second container having a second insertion portion and a second chamber portion, each of the insertion portion having an outer edge and being sandwiched between the first and second sheets, each chamber portion protruding from a plane of the sheets via a respective opening; and
- an adhesive between the first and the second sheets in at least a portion of the at least one peripheral area to adhere the two sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first air gaps therein to a thickness less than the original thickness.
15. A display pack of claim 16, wherein the at least one peripheral area is crushed to form a depressed area on at least one surface of the display pack.
16. A display pack for a product, comprising:
- a first and a second overlaying sheets, the first sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the first and second overlaying forming a layered structure having an original thickness and an outer peripheral edge, at least one of the sheets having two or more openings;
- a first container having a first insertion portion and a first chamber portion, a second container having a second insertion portion and a second chamber portion, each insertion portion having an outer edge and being sandwiched between the first and second sheets, each chamber portion protruding from a plane of the sheets via a respective opening, the overlaying sheets having at least one peripheral area inwardly of the outer peripheral edge and an inner area between the at least one peripheral area and at least one of the openings; and
- an adhesive between the first and the second sheets in the at least one peripheral area to adhere the two sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first air gaps therein in which the first corrugations are substantially flattened to a thickness less than the original thickness.
17. A display pack for a product, comprising:
- a first and a second overlaying sheets, the first sheet having a first upper facing, a first lower facing and a first inner corrugated member with first corrugations and first air gaps between the first upper and first lower facings, the second sheet comprising a sheet of paper, the first and second overlaying forming a layered structure having an original thickness and an outer peripheral edge, at least one of the sheets having two or more openings;
- a container having at least one insertion portion, a first chamber portion and a second chamber portion, the at least one insertion portion having an outer edge and being sandwiched between the first and second sheets, each chamber portion protruding from a plane of the sheets via a respective opening, the overlaying sheets having at least one peripheral area inwardly of the outer peripheral edge and an inner area between the at least one peripheral area and at least one of the openings; and
- an adhesive between the first and the second sheets in the at least one peripheral area to adhere the two sheets;
- wherein the inner area has substantially the original thickness and the at least one peripheral area is crushed with reduced first air gaps therein in which the first corrugations are substantially flattened to a thickness less than the original thickness.
18. A display pack for a product, comprising:
- a corrugated cardboard sheet and a sheet of paper overlaying each other in a stacked configuration, the cardboard sheet having an upper facing, a lower facing and an inner corrugated member with corrugations defining air gaps between the upper and lower facings, the stacked configuration having an outer peripheral edge and an original thickness, the paper sheet defining at least one opening;
- at least one container having a flat insertion portion and a chamber portion for holding the product, the insertion portion being sandwiched between the cardboard sheet and the sheet of paper and the chamber portion protruding from a plane of the stacked configuration via the opening, the stacked configuration having an inner portion extending around the opening, and at least one peripheral area extending from the inner portion to and including at least a segment of the outer peripheral edge; and
- an adhesive between the corrugated cardboard sheet and the sheet of paper in at least a portion of the peripheral area to adhere the corrugated cardboard sheet and the sheet of paper,
- wherein the inner portion has substantially the original thickness, and the at least one peripheral area of the stacked configuration having a portion of the upper facing, the inner corrugated member, and the lower facing is crushed with reduced air gaps.
19. A display pack of claim 18, further comprising at least one litho sheet laminated onto one or both of the corrugated cardboard sheet and the flat sheet of paper.
20. A display pack for a product, comprising:
- a corrugated cardboard sheet and a flat sheet of paper overlaying each other in a stacked configuration, the cardboard sheet having an upper facing, a lower facing and an inner corrugated member with corrugations defining air gaps between the upper and lower facings, the stacked configuration having an outer peripheral edge and an original thickness, the paper sheet defining at least one opening;
- at least one container having a flat insertion portion and a chamber portion for holding the product, the insertion portion being sandwiched between the cardboard sheet and the paper sheet and the chamber portion protruding from a plane of the stacked configuration via the opening, the stacked configuration having an inner portion extending around the opening and covering at least a portion of the insertion portion, and at least one peripheral area extending from the inner portion to and including at least a segment of the outer peripheral edge; and
- an adhesive between the corrugated cardboard sheet and the paper sheet in at least a portion of the peripheral area to adhere the corrugated cardboard sheet and the flat sheet,
- wherein the inner portion has substantially the original thickness, and the at least one peripheral area of the stacked configuration having a portion of the upper facing, the inner corrugated member, and the lower facing is crushed with reduced air gaps.
Type: Application
Filed: May 24, 2012
Publication Date: Sep 13, 2012
Inventor: Joseph Nazari (Glendale, CA)
Application Number: 13/480,287
International Classification: B65D 73/00 (20060101);