# Patent

## Title
Container with an integral lid retained onto the top of the sidewall of the container by a living hinge, the container used to retain hot liquids, the container having a thermal barrier incorporated into the exterior surface of the container

## Abstract

A container used to retain hot liquids in manner which enables the liquid within the container to be consumed by a person holding the container in the person's hand and drinking the liquid when the lid is in either the open or closed condition. The container has the unique features of having a self-sealing lid which is retained on the container through a living hinge. Another unique feature of the present invention is the incorporation of a thermal barrier comprised of ribs or ridges formed into the sidewall of the container.

## Background
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the field of containers used to retain hot liquid and which enables the liquid to be consumed while a person holds the container in the person's hand with the lid of the container being in either the open or closed condition.
2. Description of the Prior Art
In general, containers used to retain a liquid, whether hot or cold, are known in the prior art. The following list of patents are patents known to the present inventor which are containers of various designs used to retain liquids for consumption by person holding the container and consuming the liquid contents retained within the container:
The following 21 patents and published patent applications are relevant to the field of the present invention:

    1. U.S. Pat. No. 2,690,861 issued to Earl S. Tupper on Oct. 5, 1954 for “Dispensing Closure”.
    2. U.S. Design Pat. No. Des. 189,586 issued to George S. Nalle, Jr. on Jan. 10, 1961 for “Tumbler”.
    3. U.S. Design Pat. No. Des. 192,296 issued to Walfred M. Nyman on Feb. 27, 1962 for “Cup or Similar Article”.
    4. U.S. Pat. No. 3,194,468 issued to Ronald Baron on Jul. 13, 1965 for “Plastic Drinking Cups”.
    5. U.S. Design Pat. No. Des. 204,783 issued to Ronald E. Johnson and assigned to Columbus Plastics Products, Inc. on May 17, 1966 for “Drinking Cup”.
    6. U.S. Design Pat. No. Des. 212,352 issued to Paul Davis on Oct. 8, 1968 for “Cup”.
    7. U.S. Pat. No. 3,437,253 issued to Paul Davis et al. on Apr. 8, 1969 for “Disposable Plastic Cup With Stiff Gripping Section”.
    8. U.S. Pat. No. 3,443,715 issued to Bryant Edwards on May 13, 1969 for “Double Wall Container”.
    9. U.S. Pat. No. 3,606,262 issued to Teunis Van't Hoff on Sep. 20, 1971 for “Cup, Mug or Other Drinking Vessel, More Especially Made of Plastic”.
    10. U.S. Pat. No. 3,860,135 issued to Michael A. Yung et al. on Jan. 14, 1975 for “Container And Container-Cap Combination”.
    11. U.S. Design Pat. No. Des. 248,358 issued to Tommy Thomas on Jul. 4, 1978 for “Cup”.
    12. U.S. Pat. No. 5,310,081 issued to Brad M. McCabe on May 10, 1994 for “Integral Beverage Container”.
    13. U.S. Pat. No. 5,312,011 issued to Dan E. Fischer on May 17, 1994 for “Stackable Container System”.
    14. U.S. Pat. No. 5,667,094 issued to Thomas P. Rapchak et al. on Sep. 16, 1997 for “Container and Closure Assembly”.
    15. U.S. Pat. No. 5,765,716 issued to Liming Cai et al. on Jun. 16, 1998 for “Cup Protector”.
    16. U.S. Design Pat. No. D437,733 issued to Sascha Kaposi on Feb. 20, 2001 for “Ribbed Side Drinking Vessel”.
    17. U.S. Pat. No. 6,571,981 issued to Joey L. Rohlfs on Jun. 3, 2003 for “Disposable Sipper Cups”.
    18. U.S. Pat. No. 6,601,728 issued to Raymond Newkirk et al. on Aug. 5, 2003 for “Thermal Cup Holder”.
    19. U.S. Pat. No. 6,955,289 B2 issued to John Green on Oct. 18, 2005 for “Container Having an Integral Lid”.
    20. United States Published Patent Application No. 2006/0043100 to Joseph E. Johnson et al. for “Vial With Hinged Cap And Method of Making Same”.
    21. United States Published Patent Application No. 2009/0223969 to Tony V. Bouie on Sep. 10, 2009 for “Lid Assembly and Method For Use Thereof”.


There is a significant need for an improved container which provides advantages which are lacking in the prior art containers.
SUMMARY OF THE INVENTION
The present invention is a container used to retain hot liquids in manner which enables the liquid within the container to be consumed by a person holding the container in the person's hand and drinking the liquid when the lid is in either the open or closed condition. The present invention container has the unique features of having a self-sealing lid which is retained on the container through a living hinge. The lid further accomplishes a positive and effective seal when the lid is closed so that leakage from the container is eliminated or at least minimized during normal use thereof. The design of the lid enables the liquid within the container to be consumed with the lid in either the closed or open condition. Another unique feature of the present invention is the incorporation of a thermal barrier comprised of ribs or ridges formed into the sidewall of the container. Therefore, a person can grasp the container which may contain hot liquid within the container and the thermal ridges provide a heat barrier so that a person can hold the container and not be burned or feel discomfort from the hot liquid within the container.
It is therefore an object of the present invention to provide a container for retaining hot liquids which can be consumed from the container while a person is grasping the sidewall of the container with the person's hand, the container incorporating a thermal barrier on its sidewall so that an air gap is formed to dissipate heat from the container to enable a person to grasp the container while it contains a hot liquid.
It is a further object of the present invention to provide a container having a lid retained onto the container by an integral living hinge which enables the lid to be placed in an open condition so that liquid may be poured into the container and which enables the container to thereafter be sealed with a positive and effective seal.
It is an additional object of the present invention to provide a container having integral tab means to enable the container to be opened after it has been positively sealed so that more liquid can be poured into the container or liquid can be removed from the container.
It is also an object of the present invention to provide a container with a lid retained by a living hinge so that the lid is integral with the container and will not be inadvertently lost or soiled which is a problem with prior art containers which have a separately affixed lid.
It is a further object of the present invention to provide a container which enables liquid to be consumed from the container when the lid is in either the closed or open condition.
It is also an object of the present invention to provide a container made out of biodegradable material so that the material can be reused and is eco-friendly.
Further novel features and other objects of the present invention will become apparent from the following detailed description, discussion and the appended claims, taken in conjunction with the drawings.



BRIEF DESCRIPTION OF THE DRAWINGS
Referring particularly to the drawings for the purpose of illustration only and not limitation, there is illustrated:
FIG. 1 is a perspective view of the present invention container with an integral lid retained on the container by a living hinge, the sidewalls including a thermal barrier formed into the sidewalls so that the container can be held when hot liquid is retained in the container, the container shown with the lid in the closed condition;
FIG. 2 is a top plan view of the container with the lid in the closed condition;
FIG. 3 is a bottom plan view of the container with the lid in the closed condition;
FIG. 4 is a front elevational view of the container with the lid in the closed condition;
FIG. 5 is a rear elevational view of the container with the lid in the closed condition;
FIG. 6 is a side elevational view of the container with the lid in the closed condition, the view taken when viewed from the left side, the right side elevational view being a mirror image thereof;
FIG. 7 is a perspective view of the present invention container with an integral lid retained on the container by a living hinge, the sidewalls including a thermal barrier formed into the sidewalls so that the container can be held when hot liquid is retained in the container, the container shown with the lid in the open condition;
FIG. 8 is a top plan view of the container with the lid in the open condition;
FIG. 9 is a bottom plan view of the container with the lid in the open condition;
FIG. 10 is a front elevational view of the container with the lid in the open condition;
FIG. 11 is a rear elevational view of the container with the lid in the open condition; and
FIG. 12 is a side elevational view of the container with the lid in the open condition, the view taken when viewed from the left side, the right side elevational view being a mirror image thereof.



DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Although specific embodiments of the present invention will now be described with reference to the drawings, it should be understood that such embodiments are by way of example only and merely illustrative of but a small number of the many possible specific embodiments which can represent applications of the principles of the present invention. Various changes and modifications obvious to one skilled in the art to which the present invention pertains are deemed to be within the spirit, scope and contemplation of the present invention as further defined in the appended claims.
Referring to FIGS. 1 through 12, the present invention cup or container 10 includes a bottom 12 and a rim 14 and a continuous wall 16 interconnecting the bottom 12 and the rim 14. The continuous wall has an exterior surface 18 and an interior surface 20. The container has an interior chamber 22 surrounded by the wall 16 and bottom 12. Disposed below the rim 14 at a distance “H1” is an interior groove 26 which extends for a continuous given circumferential distance along the interior circumference of interior wall 20. The rim 14 is aligned with and extends for approximately the same circumferential distance as the groove 26. The continuous wall 16 extends for approximately the same circumferential distance as the rim 14 and at a given height “H2” and then slopes downwardly to a lower wall 16A having a height “H3” which is below rim 14 and above interior groove 26.
The lid 30 of the present invention is generally circular in shape and has a top surface 32 and a bottom surface 34 with a sip opening 36 extending through the lid 30 from the bottom surface 34 to the top surface 32, the sip opening 36 preferably located adjacent the exterior circumference 38 of the lid 30. A flexible living hinge 60 is integrally formed with the container wall 16 and lid 30 with an interior end 62 formed with and resting against lower wall 16A and an exterior end 64 terminating in a vertical member 66 formed into lid 30. The living hinge 60 has an recess or cut 68 about which the living hinge 60 can rotate.
The lid 30 has at least one and preferably a pair of spaced apart tabs 40 and 48 integrally formed with the lid and adjacent the exterior circumference 38 of the lid 30. First tab 40 includes a vertical section 42, first bent section 44 and a transverse section 46. Second tab 48 includes a vertical section 50, a first bent section 52 and a transverse section 54. In the preferred embodiment, the first and second tabs 40 and 48 are located on the rim 30 at approximately equal distances from the location where the lid 30 is attached to the living hinge 40 and at locations on the lid 30 at opposite spaced apart locations from the sip opening 36.
When in the closed condition, the lid 30 and living hinge 60 are rotated about cut 68 in living hinge 60 so that circumference 38 of lid 30 is retained within groove 26. The fit enables the lid 30 to form a seal at the location of the groove 26 so that liquid 300 contained in the interior chamber 22 will not spill out. The tabs 40 and 48 are positioned so that respective transverse sections 46 and 54 rest over and against rim 14. As a result, because of the tight fit of the lid 30 within groove 26, it would be difficult to pull the lid 30 free without the transverse sections 46 and 54 which extend above and rest on the rim 14 so that one or both tabs 40 and/or 48 can be pulled on to overcome the force of the lid 30 within the groove 26 to open the container 10 and permit more liquid 300 to be poured into chamber 22 or to permit the liquid to be consumed by a person placing the person's lips on the rim 14. With the lid 30 in the closed condition, the liquid can be consumed by sipping the liquid 300 through sip opening 38 in lid 30. When in the closed condition, the space surrounded in the interior wall 18 and lid 30 can retain any liquid 300 that spilled out of sip opening 38 or may bleed out of the chamber 22 at the location of the intersection of the lid 30 and groove 26.
Therefore, through this design, any liquid but primary liquid 300 that is hot can be retained in the chamber 22 and sipped through opening 38 while the tight sealing fit of the lid 30 within interior groove 26 will assure that no liquid 300 will inadvertently spill out.
The entire container 10 including the wall 16 and bottom 12, lid 30, living hinge 60 and tabs 40 and 48 are preferably made out of biodegradable material which can be melted down and reformatted into a new container. The container 10 and its components can also be made out of polyurethane foam, or food grade polyethylene terephthalate (PET) so that it is a disposable container.
If the liquid 300 is very hot, the heat may extend through wall 16 and it may make the container difficult to hold in a person's hand. Therefore, an additional improvement of the present invention is to incorporate a multiplicity of spaced apart ribs or veins 70 formed into the exterior surface 18 of wall 16. The ribs 70 are preferably located around the entire circumference of exterior surface 18 and each rib 70 is separated from an adjacent rib by a gap 72. The ribs 70 extend radially outwardly by a distance “R”. To make grasping easier, each rib may have a slanted top surface 74 so that the top surface is slanted downwardly as well as away from exterior surface 18. The height of the ribs “H4” can range from 15% of “H2” to 50 percent of “H2” and preferably is approximately one third of the height of wall 16 and located at a mid-height location between bottom 12 and rim 14. The ribs 70 are made of the same biodegradable material or the same polyurethane foam, or food grade polyethylene terephthalate (PET) as the other components of the container 10.
Of course the present invention is not intended to be restricted to any particular form or arrangement, or any specific embodiment, or any specific use, disclosed herein, since the same may be modified in various particulars or relations without departing from the spirit or scope of the claimed invention hereinabove shown and described of which the apparatus or method shown is intended only for illustration and disclosure of an operative embodiment and not to show all of the various forms or modifications in which this invention might be embodied or operated.

## Claims

1. A container used to retain a liquid, comprising:
a. a bottom, a rim, a continuous sidewall interconnecting the bottom and the rim, the continuous sidewall having an exterior surface and an interior surface, the container having an interior chamber surrounded by the continuous sidewall and the bottom, an interior groove in the interior surface of the continuous sidewall and disposed below the rim at a given distance, the interior groove extending for a continuous given circumferential distance along the interior circumference of interior surface of the continuous sidewall, the rim aligned with and extending for approximately the same circumferential distance as the interior groove, the continuous sidewall extending for approximately the same circumferential distance as the rim at a given height and then sloping downwardly to a lower sidewall section having a height which is below rim and above interior groove;
b. a lid being generally circular in shape and having a top surface and a bottom surface with a sip opening extending through the lid from the bottom surface to the top surface, the sip opening located adjacent an exterior circumference of the lid, a flexible living hinge integrally formed with the container sidewall and lid with an interior end formed with and resting against the lower sidewall section and an exterior end terminating in a vertical member formed into lid, the living hinge having a recess about which the living hinge can rotate, the lid having a pair of spaced apart tabs integrally formed with the lid and adjacent the exterior circumference of the lid, a first tab including a vertical section, a first bent section and a transverse section, a second tab including a vertical section, a first bent section and a transverse section, the first and second tabs located on the rim at approximately equal distances from the location where the lid is attached to the living hinge and at locations on the lid at opposite spaced apart locations from the sip opening, and when in the closed condition, the lid and living hinge are rotated about the recess in the living hinge so that the circumference of the lid is retained within the interior groove in the sidewall to form a seal at the location of the groove, the tabs positioned so that their respective transverse sections rest over and against the rim; and
c. a multiplicity of spaced apart ribs formed into the exterior surface of the sidewall and located around the entire circumference of the exterior surface of the sidewall, each rib separated from an adjacent rib by a gap, the ribs extending radially outwardly by a distance, each rib having a slanted top surface.

2. The container in accordance with claim 1 wherein each rib is of a given height ranging between 15% and 50% of the height of the sidewall.

3. The container in accordance with claim 2 wherein the ribs are equidistant between the rim and the bottom.

4. The container in accordance with claim 1 wherein the container is made out of material selected from the group consisting of biodegradable material, polyurethane foam, and or food grade polyethylene terephthalate.

5. A container used to retain a liquid, comprising:
a. a bottom, a rim, a sidewall interconnecting the bottom and the rim, the sidewall having an exterior surface and an interior surface, the container having an interior chamber surrounded by the sidewall and the bottom, an interior groove in the interior surface of the sidewall and disposed below the rim at a given distance, the interior groove extending for a continuous given circumferential distance along the interior circumference of the interior surface of the sidewall, the sidewall extending for approximately the same circumferential distance as the rim at a given height and then sloping downwardly to a lower sidewall section;
b. a lid having a top surface and a bottom surface with a sip opening extending through the lid from the bottom surface to the top surface, a flexible living hinge integrally formed with the container sidewall and lid with an interior end formed with the lower sidewall section and an exterior end formed into the lid, the lid having at least one tab integrally formed with the lid and adjacent the exterior circumference of the lid and having a vertical section, a first bent section and a transverse section, and when the lid is closed the lid and living hinge are rotated about a recess in the living hinge so that the circumference of the lid is retained within the interior groove in the sidewall to form a seal at the location of the groove, the at least one tab positioned so that its transverse section rests over and against the rim; and
c. a multiplicity of spaced apart ribs formed into the exterior surface of the sidewall and located around the entire circumference of the exterior surface of the sidewall, each rib separated from an adjacent rib by a gap, the ribs extending radially outwardly by a distance.

6. The container in accordance with claim 5 wherein each rib is of a given height ranging between 15% and 50% of the height of the sidewall.

7. The container in accordance with claim 6 wherein the ribs are equidistant between the rim and the bottom.

8. The container in accordance with claim 5 wherein the container is made out of material selected from the group consisting of biodegradable material, polyurethane foam, and or food grade polyethylene terephthalate.

9. A container used to retain a liquid, comprising:
a. a bottom, a rim, a sidewall interconnecting the bottom and the rim, the sidewall having an exterior surface and an interior surface, the container having an interior chamber surrounded by the sidewall and the bottom, an interior groove in the interior surface of the sidewall and disposed below the rim at a given distance, the interior groove extending for a continuous given circumferential distance along the interior circumference of interior surface of the sidewall;
b. a lid having a top surface and a bottom surface with a sip opening extending through the lid from the bottom surface to the top surface, a flexible living hinge integrally formed with and interconnecting the container sidewall and lid, the lid having at least one tab integrally formed with the lid and adjacent the exterior circumference of the lid and having a transverse section, and when the lid is closed the lid is rotated so that the circumference of the lid is retained within the interior groove in the sidewall to form a seal at the location of the groove, the at least one tab positioned so that its transverse section rests over and against the rim; and
c. a multiplicity of spaced apart ribs formed into the exterior surface of the sidewall and located around the entire circumference of the exterior surface of the sidewall, each rib separated from an adjacent rib by a gap, the ribs extending radially outwardly by a distance.

10. The container in accordance with claim 9 wherein each rib is of a given height ranging between 15% and 50% of the height of the sidewall.

11. The container in accordance with claim 10 wherein the ribs are equidistant between the rim and the bottom.

12. The container in accordance with claim 9 wherein the container is made out of material selected from the group consisting of biodegradable material, polyurethane foam, and or food grade polyethylene terephthalate.