Patent Application
20090078699
The present invention relates generally to insulated shipping containers and relates more particularly to insulated shipping containers of the type which are formed at least in part of foamed polymer material.
Conventional insulated shipping containers of the so-called box-within-a-box configuration are well-known. These conventional box-within-a-box containers typically have an outer box formed of corrugated cardboard and a smaller, open-topped, inner box also formed of corrugated cardboard, the outer and inner boxes defining a void space therebetween. During manufacture of such shipping containers, the void space is filled with a foamed-in-place polymer material, said foamed-in-place polymer material typically being a light-to-medium density foamed polyurethane material.
Typically, the manufacture of such box-within-a-box containers comprises mounting the inner box, in an inverted position, over a manufacturing fixture having an upstanding plug member. Next, the outer box is inverted onto the manufacturing fixture with its top closure flaps turned outward, and its bottom closure flaps opened. The manufacturing fixture includes an outer movable wall structure which supports the side walls of the outer box. The polymer material in a liquid pre-foamed condition is then sprayed or poured into the void space between the two boxes and is allowed to foam in place. The foaming of the polymer material takes a sufficient period of time that the bottom closure flaps of the box may be closed before the foam fills the entirety of the void space, and a lid is closed over these closure flaps to support the box against the internal pressure created by the foaming polymer. As this polymer material foams in place, it bonds to both the inner and outer boxes and exerts a considerable pressure against both the inner and outer boxes. In fact, were it not for the support to these boxes provided by the manufacturing fixture, the boxes would be seriously distorted or destroyed by the foam pressure. After an additional period of time (total time of ten minutes or less), the foam hardens sufficiently that the substantially finished shipping container may be removed from the fixture.
In using such conventional insulated shipping containers, it is common for one or more articles being shipped therein to be inserted into the inner box of the container, together with dry ice or other temperature stabilizing packs and packing material. A form-fitting block of comparatively thick, open-cell foam is then inserted into the opening of the inner box. This open-cell foam serves as a thermal insulator and prevents the infusion of ambient air into the inner box and the escape of temperature-controlled air from within the inner box. Next, the top closure flaps of the outer box are closed and taped, and the shipping container is ready for shipment with the attachment of a shipping label thereto.
Unfortunately, the above-described conventional insulated shipping container has certain shortcomings. One significant shortcoming is that the materials of the container are not recyclable because the foamed polymer material bonds directly to the inner and outer cardboard boxes and cannot thereafter easily be separated therefrom. This shortcoming is an ever-increasing concern as more and more states and countries require that shipping materials which have destinations within their jurisdictions be recyclable or otherwise be subject to a penalty tax or fee for special disposal. Moreover, if the outer box becomes damaged or otherwise marked, it cannot be replaced in such a way as to permit the container to be reused.
One suggestion that has been proposed to allow the separation of foamed polymer material from the cardboard boxes of the aforementioned type of container has been to simply bunch a flat sheet of plastic film within the outer box and over the inner box before the foam polymer material in a liquid form is injected. However, the bunching of a flat sheet of plastic film in the above-described manner typically results in the formation of many folds and fissures in the excess sheet material. These many folds and fissures often form many airflow pathways through which temperature-controlled air can escape from the container, and through which ambient air can enter. Also, as can readily be appreciated, the aforementioned bunching of the plastic film typically results in variations in the thickness of the insulative foamed polymer in the vicinity of said folds and fissures. As a result, some containers made by this method possess one or more areas where the insulating foam is too thin and where, in effect, the contents are exposed to “hot spots” or “cold spots” of ambient air leaking into the container. Because one potential application of insulated shipping containers is in the transport of temperature-sensitive medical specimens or materials which are irreplaceable or critical to the well-being of a patient, the risks associated with using a shipping container made using a bunched flat sheet in the above-described manner are often too great.
In U.S. Pat. No. 5,897,017, inventor Lantz, which issued Apr. 27, 1999, and in U.S. Pat. No. 6,257,764, inventor Lantz, which issued Jul. 10, 2001, both of which are incorporated herein by reference, there is disclosed a recyclable insulated shipping container that addresses many of the above-described shortcomings associated with the use of a bunched flat sheet to separate foamed polymer material from a cardboard box. More specifically, the two Lantz patents above disclose an insulated shipping container that includes a specially-designed plastic bag into which the foam polymer material in a liquid form is injected to yield a body of foamed polymer material substantially contained within the specially-designed plastic bag, the body of foamed polymer material defining a chamber therein and an opening outwardly from the chamber surrounded by a transition surface, the specially-designed plastic bag including a rectangular end portion and a curved transition section extending from the rectangular end portion to a transverse line at which the bag defines a hoop dimension sufficient to allow the bag to extend across the transition surface of the body of foamed polymer material.
Because of its tailored shape, the Lantz bag has a minimal number of folds and fissures and, therefore, results in a body of foamed polymer material that is substantially uniformly thick and substantially free of fissures. Unfortunately, as can readily be appreciated, because of its unusual shape, the Lantz bag can be expensive to manufacture, thereby resulting in a shipping container that is expensive to manufacture.
In U.S. Pat. No. 5,924,302, inventor Derifield, which issued Jul. 20, 1999, and which is incorporated herein by reference, there is disclosed a shipping container including an insulated body having a cavity for holding a product being shipped, and having one or more cavities for holding coolant in a predetermined relationship to the product. The container also includes an insulated cover adapted to sealably engage an open end of the insulated body after a product and coolant are received therein. The cover includes one or more blocks or prongs extending therefrom that are adapted to slidably engage the coolant cavities and/or the product cavity to substantially minimize air spaces in the cavities and/or seal them. The insulated body and cover preferably are formed from injection molded polyurethane, wrapped in a plastic film and inserted into a cardboard shipping carton.
In U.S. Pat. No. 6,868,982, inventor Gordon, which issued Mar. 22, 2005, and which is incorporated herein by reference, there is disclosed an insulated shipping container and a method of making the same. In a preferred embodiment, the insulated shipping container comprises an outer box, an insulated insert, an inner box and a closure member. The outer box, which is preferably made of corrugated fiberboard, comprises a rectangular prismatic cavity bounded by a plurality of rectangular side walls, a closed bottom end, and top closure flaps. The insulated insert is snugly, but removably, disposed within the outer box and is shaped to define a rectangular prismatic cavity bounded by a bottom wall and a plurality of rectangular side walls, the insulated insert having an open top end. The insulated insert is made of a foamed polyurethane body to which on all sides, except its bottom, a thin, flexible, unfoamed polymer bag is integrally bonded. The bag is a unitary structure having a generally uniform rectangular shape, the bag being formed by sealing shut one end of a tubular member with a transverse seam and forming longitudinal creases extending from opposite ends of the seam. The inner box, which is snugly, but removably, disposed within the insert, is preferably made of corrugated fiberboard and is shaped to include a rectangular prismatic cavity bounded by a plurality of rectangular side walls and a closed bottom end, the top end thereof being open. The closure member is a thick piece of foam material snugly, but removably, disposed in the open end of the inner box.
Additional shipping containers are described in the following patents and published patent applications, all of which are incorporated herein by reference: U.S. Pat. No. 6,044,650, inventors Cook et al., which issued Apr. 4, 2000; U.S. Pat. No. 5,709,307, inventors Rosado et al., which issued Jan. 20, 1998; U.S. Pat. No. 5,450,977, inventor Moe, which issued Sep. 19, 1995; U.S. Pat. No. 5,501,338, inventor Preston, which issued Mar. 26, 1996; U.S. Patent Appln. Publication No. US 2005/0224501 A1, inventors Folkert et al., which was published Oct. 13, 2005; and U.S. Patent Appln. Publication No. US 2003/0102317 A1, inventor Gordon, which was published Jun. 5, 2003.
The shipping containers described above, while suitable for many purposes, are not capable of meeting certain shipping requirements, such as being able to maintain an article contained therein at a temperature of between 2° C. and 8° C. for 48 hours while subjected to summer-like and winter- like ambient temperatures. The ability to maintain an article at a temperature of between 2° C. and 8° C. for 48 hours or longer under summer-like and winter-like ambient temperatures is very important for shipping certain temperature sensitive materials, such as certain biologicals and pharmaceuticals.
It is an object of the present invention to provide a novel insulated shipping container.
It is another object of the present invention to provide an insulated shipping container as described above that addresses at least some of the shortcomings associated with existing insulated shipping containers.
It is still another object of the present invention to provide a method of making an insulated shipping container of the type described above.
According to one aspect of the invention, there is provided an insulated shipping container, said insulated shipping container comprising: (a) an insulated insert, said insulated insert being a unitary body shaped to include a bottom, a plurality of sides and a top, the top including a raised peripheral edge and a recessed shelf, at least one product cavity and at least one coolant cavity extending downwardly from the recessed shelf, the at least one coolant cavity, when viewed from above, having a top-hat shape comprising a crown portion and a brim portion; and (b) an insulated lid, the insulated lid being removably mounted on the insulated insert in such a way as to cover the top of the insulated insert.
According to another aspect of the invention, there is provided an insulated shipping container, said insulated shipping container comprising: (a) an insulated insert, said insulated insert having an open top and defining a central product cavity and a plurality of coolant cavities surrounding said central product cavity, each of said coolant cavities, when viewed from above, having a top-hat shape comprising a crown portion and a brim portion; (b) an insulated lid, the insulated lid being removably mounted on the insulated insert in such a way as to cover the open top of the insulated insert; and (c) a coolant member removably received in each of said coolant cavities, the coolant member being adapted to fit within the crown portion of the coolant cavity, with the brim portion of the coolant cavity remaining empty.
For purposes of the present specification and claims, relational terms like “top,” “bottom,” “upper,” and “lower” are used to describe the present invention in a context in which the open-end of the storage cavity of the container is facing upwardly. It is to be understood that, by orienting the container such that the storage cavity faces in a direction other than upwardly, the directionality of the invention will need to be adjusted accordingly.
Additional objects, as well as features and advantages, of the present invention will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the invention. In the description, reference is made to the accompanying drawings which form a part thereof and in which is shown by way of illustration an embodiment for practicing the invention. The embodiment will be described in sufficient detail to enable those skilled in the art to practice the invention, and it is to be understood that other embodiments may be utilized and that structural changes may be made without departing from the scope of the invention. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present invention is best defined by the appended claims.
The accompanying drawings, which are hereby incorporated into and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the principles of the invention. In the drawings wherein like reference numerals represent like parts:
a) and 5(b) are enlarged bottom and side views, respectively, of the lid shown in
a) and 6(b) are enlarged top and side views, respectively, of one of the bricks shown in
a) and 7(b) are enlarged top and side views, respectively, of one of the saddle bags shown in
a) through 16(d) are perspective, top, front and side views, respectively, of the bottom portion of the outer corrugate box shown in
a) through 17(c) are perspective, top and front view, respectively, of the top portion of the outer corrugate box shown in
a) through 19(c) are perspective, front and side views, respectively, of the outer body of the insulated insert shown in
a) through 20(c) are perspective, top, front and side views, respectively, of the inner body of the insulated insert shown in
a) through 21(d) are perspective, top, front and side views, respectively, of one of the coolant bricks shown in
a) through 22(d) are perspective, top, front and side views, respectively, of one of the saddlebags shown in
a) through 23(d) are perspective, top, front and side views, respectively, of the payload container shown in
a) through 24(d) are perspective, top, front and side views, respectively, of the lid shown in
Referring now to
Container 11 comprises an outer box 13, an insulated insert 15, a pair of coolant saddlebags 17-1 and 17-2, a plurality of coolant bricks 19-1 through 19-4, a payload container 21 and an insulated cover 23.
Outer box 13, which is preferably a corrugated fiberboard or corrugated plastic box and which may be conventional in construction, comprises a rectangular prismatic cavity 25 bounded by a plurality of rectangular side walls 27-1 through 27-4, a plurality of bottom closure flaps (not shown), and a plurality of top closure flaps 29-1 through 29-4. Adhesive strips of tape or other adhesive means (not shown) may be used to retain in a closed condition the bottom closure flaps and top closure flaps 29-1 through 29-4.
Insulated insert 15, which is also shown in
Insert 15 is slidably removably disposed within cavity 25 of outer box 13, with sides 33-1 through 33-4 of insert 15 snugly abutting the inside surfaces of side walls 27-1 through 27-4, respectively, and bottom 32 of insert 15 seated upon the bottom closure flaps of outer box 13. To facilitate the insertion and removal of insert 15 into and from outer box 13, respectively, beveled surfaces 33-5 through 33-8 are provided at the corners of sides 33-1 through 33-4.
As seen best in
Insert 15 may be made in a manner generally similar to that used to make insert 31 of U.S. Pat. No. 6,868,982, except that, in the present invention, after the positioning of bag 43 in the forming tool but prior to the introduction of the polymer foam into the bag, four appropriately dimensioned blocks are fastened to the bottom inside end of the forming tool through bag 43 for use in creating cavities 39-1 and 39-4 at what will become the top end of insert 15. After the foam has set in the tool, insert 15 is removed from the tool and the four aforementioned blocks are removed from insert 15 to yield cavities 39-1 through 39-4.
Insulated cover 23, which is also shown in
Preferably, cover 23 has a similar composition to insert 15 and comprises a body of foamed polymer material, preferably a foamed polyurethane (which may be formed using the same types of blowing agents discussed above in connection with cover 23), encased in a thin, flexible, non-self-supporting, unfoamed polymer bag made of hexene or a polyethylene (preferably a high density polyethylene).
Coolant bricks 19-1 through 19-4, one of which is separately shown in
Saddle bags 17-1 and 17-2, one of which is separately shown in
Payload container 21, which is preferably a corrugated fiberboard or corrugated plastic box and which may be conventional in construction, is adapted to receive a temperature sensitive product. In those instances in which the temperature sensitive product does not occupy the entirety of payload container 21, packaging material (e.g., bubblewrap) may be positioned around the product inside payload container 21 to fill some or all of the remaining space.
Although container 11 may be varied in size to suit particular applications, illustrative dimensions for a preferred embodiment are shown in the drawings.
Container 11 may be used in the conventional manner to ship goods. One desirable feature of container 11 is that container 11 can maintain products at a temperature between 2° C. and 8° C. for 48 hours when exposed either to summer-like or to winter-like ambient temperatures. For example, as can be seen by reference to
Referring now to
Container 101 comprises an outer box bottom portion 103, an outer box top portion 104, an insulated insert 105, a plurality of coolant saddlebags 107-1 through 107-4, a plurality of coolant bricks 109-1 through 109-4, a payload container 111 and an insulated cover 113. (For simplicity, outer box bottom portion 103 and outer box top portion 104 are not shown in
Outer box bottom portion 103, which is also shown separately in
Outer box top portion 104, which is also shown separately in
Outer box bottom portion 103 and outer box top portion 104 are appropriately dimensioned to jointly encase the remaining components of container 101. Adhesive strips of tape or other means (not shown) may be used to seal outer box bottom portion 103 and outer box top portion 104 to one another.
Insulated insert 105, which is also shown separately in
Outer body 123, which is also shown separately in
A continuous coolant space 151 is jointly defined by side walls 127 of inner body 121 and cavity 148 of outer body 123, coolant space 151 being shaped to include a plurality of contiguous segments 151-1 through 151-4. Each segment 151 has a “top hat” shape when viewed from above and is shaped to include a comparatively wider but shorter and shallower “crown” section 153 and a comparatively narrower but longer and deeper “brim” section 155. Section 153 is adapted to loosely receive a coolant brick 109, with the unoccupied portion of section 153 and the completely unoccupied section 155 providing air spaces for convection, such convection being important in endowing container 101 with its thermal properties.
Like insert 15 of container 11, each of inner body 121 and outer body 123 preferably comprises a body of foamed polymer material, preferably a foamed polyurethane (which may be formed using the same types of blowing agents discussed above in connection with cover 23), to which a thin, flexible, non-self-supporting, unfoamed polymer bag, preferably made of hexene or a polyethylene (preferably a high density polyethylene), is integrally and conformingly bonded. The bags preferably cover the respective entireties of inner body 121 and outer body 123, and inner body 121 and outer body 123 may be made in a manner generally similar to that used to make insert 31 of U.S. Pat. No. 6,868,982.
Outer body 123 is slidably removably disposed within the cavity of outer box bottom portion 103, with side walls 143-1 through 143-8 of outer body 123 snugly abutting the inside surfaces of side walls 103-1 through 103-8, respectively, and bottom 141 of outer body 123 seated upon the bottom wall 103-9 of outer box bottom portion 103.
Coolant bricks 109-1 through 109-4, one of which is separately shown in
Saddlebags 107-1 through 107-4, one of which is separately shown in
Payload container 111, which is also shown separately in
Insulated cover 113, which is also shown separately in
Preferably, cover 113 has a similar construction to inner and outer bodies 121 and 123 and comprises a body of foamed polymer material, preferably a foamed polyurethane (which may be formed using the same types of blowing agents discussed above in connection with cover 23), encased in a thin, flexible, non-self-supporting, unfoamed polymer bag made of hexene or a polyethylene (preferably a high density polyethylene).
Although container 101 may be varied in size to suit particular applications, illustrative dimensions for a preferred embodiment are shown in the drawings.
The embodiments of the present invention recited herein are intended to be merely exemplary and those skilled in the art will be able to make numerous variations and modifications to it without departing from the spirit of the present invention. All such variations and modifications are intended to be within the scope of the present invention as defined by the claims appended hereto.
The present application is a continuation-in-part of PCT Application No. PCT/US07/05524, filed Mar. 2, 2007, which, in turn, claims the benefit under 35 U.S.C. 119(e) of U.S. Provisional Patent Appln. No. 60/847,321, filed Sep. 25, 2006, and U.S. Provisional Patent Appln. No. 60/778,309, filed Mar. 2, 2006. All of the above-identified patent applications are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| 60847321 | Sep 2006 | US | |
| 60778309 | Mar 2006 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/US07/05524 | Mar 2007 | US |
| Child | 12231425 | US |
