# Patent

## Title
Plastic coffee container with corner handle

## Abstract

A plastic container for a particulate product has a footprint and includes a base and at least two and preferably four sides upstanding therefrom which generally define a container main interior volume. A top connects to the sides and includes a large opening which is closed by a lid. One corner includes a pass-through handle located therein having a generally vertical segment which may define a hollow cavity in communication with the main interior volume. The opening of the top is sufficiently large to extend over a portion of the hollow cavity; or is sufficiently wide to receive about a 5′′ diameter cylinder therethrough, and has a ratio of a minimum span to a bottom diagonal of at least about 2⁄3. A shoulder between the top and sides has an angle of less than about 40°. The handle is configured and sized for easy grasping and holding.

## Background
RELATED APPLICATIONS
This application has subject matter similar to application Ser. No. 11/353,091 and application Ser. No. 11/353,093, filed concurrently herewith and by the same inventors; which applications are hereby incorporated by reference.
BACKGROUND OF THE INVENTION
Containers for particulate (roast or ground) coffee have many unique requirements not considered for other containers. For example, coffee particulates give off gases while being stored, and are deleteriously affected by air. Thus, coffee particulate containers must prevent the ingress of air and hence be air-tight; but such containers must also be suitably robust to withstand a build-up of pressure, or alternatively, the container must vent the built up gases before the pressure thereof damages (miss-shapes or breaks) the container.
While particulate coffee containers were previously generally made of metal (which was easily made robust and air-tight), new plastic containers, particularly with layered walls, have now been found to be suitable for containing particulate coffee. However, such plastic containers have been difficult to handle, especially where they are of sufficient size to store a desired volume of particulate coffee, typically in the range of 2-4 pounds. Ease of use by the user of such plastic containers at home has also been a problem.
Plastic coffee containers have been known with pinch handles. However, such pinch handles require significant friction to be generated by the thumb/fingers of the user to prevent slippage, which friction is the result of the force with which the thumb/fingers engage the pinch handle. Thus, such pinch handles are difficult for the user to hold and to hold with the required force for a sufficient time due to tiring, so that the overall container weight which a user is able to hold is limited. In addition, as the container is supported against slippage by thumb/fingers engaging the pinch handle, this produces a moment on the wrist which produces strain to the wrist and which may also add to the difficulty of holding the container and the tiring of the hand of the user, and which adds to the difficulty of holding on to the pinch handle itself. Thus, from an ergonomics viewpoint, pinch handles have significant disadvantages.
BRIEF SUMMARY OF THE INVENTION
In accordance with the present invention, a plastic container for a particulate product, which product is removed by hand therefrom, includes a base and respective at least two sides and more preferably at least first, second, third and fourth sides upstanding from the base. The base and the two or more sides generally define a container main interior volume, and generally form a footprint for the container which is in some embodiments generally rectangular or more preferably square. A top includes a large opening therein which is closed by a lid. One corner includes a pass-through handle located therein. The pass-through handle may include a generally vertical segment which may include a hollow cavity in a preferred embodiment which is in communication with the main interior volume. The opening of the top is sufficiently large so that it extends over a portion of the vertical segment or hollow cavity therein.
In a preferred embodiment, the opening is centered on the footprint. In addition, the hollow cavity has a top end and a bottom end, both of which are in communication with the main interior volume.
Further in a preferred embodiment, the top opening is sufficiently wide to receive about a 5′′ diameter cylinder therethrough to assure that a user's hand will also fit therethrough. Additionally, the top opening preferably has a ratio of a minimum span to a bottom diagonal of at least about 2:3.
In accordance with a preferred embodiment, the handle has a vertical length of at least about 2.5′′ and a width to thickness ratio of about 1.0 to 1.2. In addition, the hollow cavity of the handle tapers slightly inward from the bottom to the top, which taper is preferably about 3°.
In one embodiment, the sides are generally connected to the top by a shoulder whose angle to vertical at a maximum thereof is less than about 40°. This connection may also include one or more beads above the shoulder. In addition, above the handle there is preferably provided a thumb receiving concavity. If desired, the vertical segment can include vertically spaced concavities forming finger grips on an inwardly directed part thereof.
In another preferred embodiment, two of the sides include label or graphics receiving areas indented from a remainder of the respective side. In addition, the sides may include vertical ribs and/or horizontal ribs.
In a further preferred embodiment, the sides are connected to one another by short bevel transition portions, so that where there are four main sides there are in effect eight total sides though the footprint is still generally rectangular.
In still other preferred embodiments, the container has only two flat sides and an arcuate side or three sides.
In still another preferred embodiment, a lower portion of the first and second sides adjacent the handle includes a respective concavity extending horizontally therealong and upwards from the base. In addition, the top includes a recess therein vertically below but adjacent the opening.
It is an advantage of the present invention that a plastic container from which a particulate product is withdrawn includes a handle which is easily grasped and held.
It is also an advantage of the present invention that the container has a wide opening permitting easy access thereto by the user in order to withdraw the product therefrom, especially when the container is almost empty.
It is a further advantage that the container has sufficient shoulder strength to withstand stacking and/or loading without damage.
Other features and advantages of the present invention are stated in or apparent from detailed descriptions of presently preferred embodiments of the invention as discussed in greater detail below.



BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a perspective view of a first embodiment of a particulate coffee container of the present invention.
FIG. 2 is an elevation view taken in the direction of arrow A FIG. 1.
FIG. 2A is a profile view of a corner portion taken in the plane of line 2A-2A in FIG. 1.
FIG. 2B is a partial cross sectional view taken in the plane of line 2B-2B of FIG. 1.
FIG. 3 is a bottom plan view of FIG. 1.
FIG. 4 is a top plan view of FIG. 1.
FIG. 5 is an elevation view taken in the direction of arrow B of FIG. 1.
FIG. 6 is an elevation view taken in the direction of arrow C of FIG. 1.
FIG. 7 is an elevation view similar to FIG. 2 but showing an alternative handle and vertical reinforcing ribs for the container of FIG. 1.
FIG. 8 is an elevation view similar to FIG. 2 but showing another alternative handle and horizontal reinforcing ribs for the container of FIG. 1.
FIG. 9 is an elevation view similar to FIG. 6 but showing still another alternative handle having a thumb concavity for the container of FIG. 1.
FIG. 10 is an elevation view similar to FIG. 2 but showing an alternative label receiving area for the container of FIG. 1.
FIG. 11 is a top view of another embodiment of a particulate coffee container of the present invention but having a rectangular footprint.
FIG. 12 is a top view of another embodiment of a particulate coffee container of the present invention but having a V-shaped, semi-circular closed footprint.
FIG. 13 is a top view of another embodiment of a particulate coffee container of the present invention but having a triangular footprint.
FIG. 14 is a perspective view of another embodiment of a particulate coffee container of the present invention having a concavity in the sides adjacent the corner handle.
FIG. 15 is an elevation view taken in the direction of arrow A FIG. 14.
FIG. 16 is a bottom plan view of FIG. 14.
FIG. 17 is a top plan view of FIG. 14.
FIG. 18 is an elevation view taken in the direction of arrow B of FIG. 14.
FIG. 19 is an elevation view taken in the direction of arrow C of FIG. 14.
FIG. 20 is an elevation view of an alternative embodiment of the coffee container depicted in FIGS. 14-19 having a thumb receiving concavity.



DETAILED DESCRIPTION OF THE INVENTION
With reference now to the drawings in which like numerals represent like elements throughout the views, a first embodiment of a plastic particulate coffee container 10 is shown in FIGS. 1-6. It will be appreciated that container 10 is designed for the containing of ground or roast (particulate) coffee 11 or a like non liquid-like product, so that container 10 is made of a suitable blow-molded plastic such as high density polyethylene (HDPE), preferably by an extrusion blow molding rotary process. Typically, as known in the art, such a plastic material is provided as different polymeric layers including an O2 barrier layer. As known in the art, when an excess pressure of off gases generated by particulate coffee 11 is present, a suitable vent is provided at some convenient location to release this excess pressure, as discussed subsequently hereafter. It will also be appreciated that particulate coffee 11 is typically not poured by the user, so pouring of particulate coffee 11 from container 10 is not likely. Rather, particulate coffee 11 will be removed from container 10 by a user with a scoop, spoon, or the like.
In general, it will be appreciated that container 10 includes a generally square base 12 with a right front side 14, a left front side 16, a left back side 18 and a right back side 20 extending upwardly therefrom. The above designations of “front”, “left”, etc. are taken as container 10 is viewed from the direction of arrow B in FIG. 1, but this direction and associated designations are arbitrarily chosen for convenience of description, and are not to be considered as limiting the description or the claimed invention as terms such as “first”, “second” etc. may as easily be used instead. The transition intersections of base 12 and sides 14, 16, 18 and 20 are curved as shown for strength in this embodiment. However it will be appreciated that the general footprint 22 of container 10 is rectangular, and with the sides of equal width is actually square as shown in FIG. 3 for this embodiment; so that when container 10 is maximally packaged or displayed with other containers 10 in a compact arrangement, each container is located in a square footprint. It will also be appreciated that the generally square (or rectangular) footprint also means that container 10 will not roll when it is accidentally tipped over onto a side as would occur with a cylindrical container.
Container 10 also includes a top 24 including a circular rim 34 connected to sides 14, 16, 18 and 20 so that container 10 defines a main interior volume 26 in which particulate coffee 11 is retained. Provided in top 24 and defined by rim 34 is a large opening 28. Rim 34 and opening 28 are circular in this embodiment, but either could be another shape such as oval or square, so long as opening 28 is sufficiently large to permit a hand of a consumer to pass therethrough and scoop particulate coffee 11 from container 10. The size of opening 28 is especially important when the user is trying to scoop the remaining particulate coffee 11 from the bottom of container 10, as the large opening 28 makes it easier to pass more of the user's hand therethrough in order to easily reach particulate coffee 11 resting on base 12. An opening having a main length dimension of about at least 4.5 inches and a main lateral dimension of about at least 3.5 inches is sufficient for this purpose. However, it has been found that a minimum preferred effective size for opening 28 where opening 28 is round is a 5′′ diameter—though if the opening were not circular, the minimum effective preferred size would be that which would (similarly) pass a cylinder 5′′ in diameter. In addition, a ratio of a minimum opening span of opening 28 (which is the diameter in this embodiment) to a bottom diagonal of square (or rectangular, or other polygon) base 12 is at least 2:3, and preferably about 3:4. As shown best in FIG. 4, opening 28 is preferably centered in footprint 22.
Covering opening 28 is a plastic lid or covering 30. Lid 30 is preferably removably (snap-on) held on rim 34 of top 24 as typical in the container art. In this embodiment, the removability of lid 30 is provided by use of an outside bead 32 extending laterally about the uppermost part of rim 34 and a corresponding flange 36 extending laterally inward from a bottommost part of lid 30. As shown, flange 36 is received and held underneath bead 32 when lid 30 is removably attached to rim 34. It will be appreciated that the resiliency of lid 30 permits lid 30 to be removed from rim 34 easily by a user, and that while lid 30 does serve to generally seal particulate coffee 11 from atmosphere, this is not an air-tight seal. Alternatively, a screw-on lid or the like could be used to more securely cover opening 28 of top 24 and to better seal main interior volume 26.
Prior to use—that is after manufacture/filling, during shipping and storage, and before being opened for use by a consumer—opening 28 is covered by a peelable sheet (including foil, plastic or layered foil/plastic) 38 which maintains an air-tight seal over opening 28. Sheet 38 is very thin and hence is depicted schematically by a broken line. In this preferred embodiment, sheet 38 also carries a one-way vent 40 (also schematically depicted) which permits pressurized off-gases generated in container 10 to be vented therefrom when the pressure in container 10 reaches a predetermined value. Once vented from container 10, the off-gases pass to atmosphere along small grooves (not shown) provided in lid 30 adjacent bead 32 so that the seal of lid 30 to top 24 is not air-tight as noted above. Suitable vents for use as vent 40 are known in the art (see, e.g., U.S. Pat. Nos. 5,688,544 and 6,662,827) and thus need not be discussed further; and it will be appreciated that vents at other locations such as on a side are also known and could be used if desired.
As shown best in FIGS. 1, 2, and 6, there is a shoulder 42 between rim 34 and each side 14, 16, 18 and 20. In this embodiment, shoulder 42 is slightly S-shaped for strength and is shorter in length in the middle section of each side 14, 16, 18 and 20 as compared to a maximum length at the corners such as shown in FIG. 2A. At the maximum length, it will be appreciated that shoulder 42 forms an angle α from vertical to the bead where shoulder 42 ends which angle α is less than 40° to provide a strong load bearing capability for top 24. Shoulder 42 is located below a convex bead 44 defining the lower part of rim 34. Bead 44 serves as a further reinforcement mechanism for rim 34 above shoulder 42 to reinforce the strength of rim 34 when a load is applied to top 24, such as by stacking one or more similar containers 10 thereupon as would typically occur during shipping and storage.
The provision and noted orientation of shoulder 42 serves to significantly increase the top load strength of container 10 relative to prior art containers in view of the amount of material used in container 10, termed “design effectiveness”. In top load tests performed with a container of the present invention and available prior art containers, where a force is evenly distributed to a container top having no lid under the conditions of room temperature and pressure and with nothing in the container, the following results were obtained:















TOP
WEIGHT-
VOLUME-
EFFECTIVE-


CONTAINER
LOAD-Lbs
Grams
Liters
NESS







HILLS BROS.1
281
212
3.044
4.03


HILLS BROS.1
166
184
3.044
2.74


DUTCH BOY2
205
230
4.218
3.75


Invention
350
128
2.874
7.85





1A plastic container with 39 oz. of coffee packaged therein, a SARAH LEE product.


2A plastic container with one gallon of DUTCH BOY paint therein.






    
    
        where top load is the maximum force sustained; and
        where design effectiveness is defined as (top load)×(volume)/(weight).

Design effectiveness is thus a measure of strength as a function of the volume and the amount of material needed to create that volume—which material for all containers was primarily high density polyethylene (HDPE). It will thus be seen that the present invention provides a superior design effectiveness compared to the presently available containers which were tested. While the preferred embodiment has a design effectiveness of 7.85 as indicated above, it is considered that a design effectiveness of at least about 5.0 is satisfactory to effect the advantages of the present invention.

    
    


To assist in any desired stacking of containers 10, it will also be appreciated that base 12 and lid 30 of container 10 are generally flat. However, base 12 and lid 30 are designed to have some stacking mechanism or interlocking (not shown) therebetween so that two stacked containers 10 will not have much play therebetween when stacked. For example, base 12 may have a raised platform or like concavity inside the perimeter thereof so as to create four short feet of the base, so that during stacking the four feet would receive therebetween or nest with the lid 30 of an underlying container. Other such stacking mechanisms are well known in the art, so that any other suitable prior art stacking mechanism could be used as desired.
As also shown best in FIGS. 1, 2, and 6, there is a pass-through handle 50 provided in a corner 48 of container 10, in this embodiment the corner between left back side 18 and right back side 20. This position of handle 50 makes it easy for a user to see handle 50 as it is sitting on a shelf or the like from which the user will remove container 10 for purchase or use. Handle 50 includes a generally vertical segment 52 (see FIG. 2B) which defines a hollow cavity 54 therein. It will be appreciated that cavity 54 is in communication with main interior volume 26 at both a top end 56 before the top transition segment of handle 50 and a bottom end 58 before the bottom transition segment of handle 50 as shown in FIG. 2B; though if desired this hollow cavity could be closed off or formed as a solid or filled (and then would no longer be a “cavity”). It will also be appreciated that opening 28 extends over a portion of cavity 54, as shown by broken line 60 which extends down from opening 28 is FIG. 2B. Handle 50 is considered “pass-through” since when handle 50 is gripped by a user, the fingers of the user will pass between the remainders of left and right back sides 18, 20 and handle 50, which pass through region is thus considered as an opening 61.
By use of the pass through or opening 61, handle 50 is easily and securely gripped by the hand of the user. The outside of handle 50 is generally configured the same as the (convex) curve of corner 48 to fit within the square footprint of container 10, and the inside is also somewhat convex to make it easier to grip and hold container 10. In addition, it will be appreciated that opening 61 terminates vertically upward so that the upper portion of the hand of the user gripping handle 50 will rest directly against the upper end of opening 61 for easier holding and support of container 10. Further, it will be appreciated that handle 50 starts a short distance above base 12 in corner 48, which also facilitates the blow-molding thereof, while still affording sufficient length for handle 50. As handle 50 is probably the most difficult part of container 10 to form effectively in the blow molding process, the configuration and transitions thereof are important in producing a satisfactory blow molded container.
It has been found that it is easier for most users to grip handle 50 when handle 50 is at least about 2.5 inches in length and preferably about 2.75 inches, as this affords a sufficient length for almost everyone's hand to surround. In addition, handle 50 is also easier to grip by most users when the width (horizontally across corner 48) thereof is equal to or slightly above about 1 inch, and the thickness (from the outside towards the center of container 10) is equal to or slightly below about 1 inch, so that the ratio of width to thickness falls in the range of about 1.0 to 1.2. In the preferred embodiment, the width is about 1.09 inches and the thickness is about 0.96 inches, for a ratio of about 1.09. Also in the preferred embodiment, the height of handle 50 is preferably about 45-55% of the total height of container 10. This percentage of height provides an easily gripped and manipulated handle relative to the overall size/height of container 10.
It will be appreciated that “pass-through” handle 50 is preferred over a more easily formed “pinch” handle for a container which houses a particulate such as coffee 11. One advantage of pass-through handle 50 is that it can be encircled by the hand of the user; while a pinch handle would include only opposed indentations in a side so that the pinch handle would have to be pinched between the thumb and fingers of the user requiring significant friction and thus being more difficult to hold—especially as container 10 may house four pounds or more of particulate coffee or the like. Another advantage of pass-through handle 50 is that the hand (palm) is closer to the handle and will do most of the supporting. Thus, with a pass-through handle 50, there will be a reduced moment on the wrist (due to the smaller moment arm) than with a pinch handle where the wrist will be further away from the handle and in addition the weight must be supported by thumb/fingers against slippage. Further, by use of pass-through handle 50, slippage is prevented by the upper end of the pass-through opening being engaged in a normal grip with no squeezing required. In view of these advantages, it is believed that a user will be able to hold about 60-70% more weight in a container with a pass-through handle as compared to a container with a pinch handle. Thus, from an ergonomics viewpoint, the pass-through handle is considered superior to a pinch handle for a particulate container—especially for those with smaller/weaker wrists.
If desired and as appropriate, container labels (or other graphics, such as directly printed graphics, etc.) or like information can be applied to front sides 14 and 16 over as much or little of the area thereof as required or desired. In addition, a label or labels could also be provided on back sides 18 and 20 along the generally flat areas thereof as well. In use, it is anticipated that right back side 20 including handle 50 will generally be displayed or used so that the handle thereof can be easily grasped from the right thereof, in which case right front side 14 will be facing the user and be the primary side for display of a label especially while container 10 is being displayed for purchase.
FIG. 7 shows an alternative container 10a. Container 10a is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with an “a” added thereafter. It will thus be appreciated that container 10a has a pass-through handle 50a in corner 48a. Handle 50a has a generally vertically straight outside just like handle 50 to fit within the square footprint of container 10a. However, the inside is also generally straight as well in this embodiment for a more pleasing aesthetic appearance and simpler blow-molding operation. Alternatively, handle 50a could be cylindrically shaped.
It will also be appreciated that bridging of particulate coffee 11 may be a problem in cavity 54a of handle 50a. As appreciated by those of ordinary skill in the art, bridging of particulate materials occurs due to the tendency of particulates in a relatively narrow vertical volume to form a horizontal “bridge” across the volume rather than flowing readily to the bottom of the cavity. Thus, to prevent bridging of particulate coffee 11a inside of handle 50a, handle 50a and hence cavity 54a thereof tapers inward slightly from bottom to top along the two lateral sides thereof, so that the top end (cross section) of cavity 54a is slightly smaller than the bottom end (cross section). In this preferred embodiment, the taper is about 3°, which has been found to facilitate the flowing of particulate coffee 11a freely down cavity 54a. Alternatively, the tapering could be along the inner and outer sides. These tapers are shown diagrammatically in FIG. 6 by dotted lines 50x for the lateral sides and by dotted lines 50y in FIG. 7 for the inner and outer sides. These dotted lines are shown at angles which might be slightly exaggerated for purposes of illustration and are not necessarily exactly 3°.
FIG. 8 shows another alternative container 10b. As with similar container 10a, container 10b is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with a “b” added thereafter. It will thus be appreciated that container 10b has a pass-through handle 50b in corner 48b. Handle 50b has a generally straight outside just like handle 50 to fit within the square footprint of container 10b, but the inside of container 10b includes concave recesses 62 spaced vertically therealong to receive the four fingers of a user when the user grasps handle 50b, and thus to provide a more sure and easy gripping of container 10b by the user.
It will also be appreciated that a container in accordance with the present invention can be provided with vertical ribs in the sides to increase top load potential, and/or horizontal ribs in the sides to help prevent side panel warping and distortion. An example of vertical ribs 86 is shown in container 10a of FIG. 7; while an example of horizontal ribs 88 is shown in container 10b of FIG. 8. Ribs 86 and 88 can be either concave as shown, or convex.
FIG. 9 shows another alternative container 10c. As with similar containers 10a and 10b, container 10c is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with a “c” added thereafter. It will thus be appreciated that container 10c has a pass-through handle 50c in corner 48c which is substantially similar to handle 50 (and which could be identical to handles 50a or 50b as well). However, the lateral sides of handle 50c are slightly convexly curved as shown in FIG. 9, to provide additional comfort for the user, as well as to facilitate the molding thereof. In addition, located above handle 50c in or above corner 48c such as primarily in shoulder 42, is a thumb receiving concavity 64, which as shown is deepest adjacent an upper end thereof. Thumb receiving cavity 64 serves to make container 10c even easier to grip, as the user can place their thumb in cavity 64 for a more secure grip of container 10c. 
FIG. 10 shows another alternative container 10d. As with similar containers 10a, 10b and 10c, container 10d is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with a “d” added thereafter. It will thus be appreciated that container 10d has right front side 14d and right back side 20d shown (the not shown sides being a mirror image thereof, and that right front side 14d has been indented to provide a label (or graphics) receiving area 66 thereon. Preferably, label receiving area 66 extends around the corner and into a similarly provided label receiving area in the left front side (not shown). (receiving area 66 is suitably flat and sized to adhesively or otherwise receive a label thereon. The use of label area 66 serves to add prominence to the labels, and the perimeters thereof also serve as a strength reinforcement for the associated side or corner. If desired, a single label could extend from all or some portion of right front side 14d around the corner to all or some portion of left front side 16 (not shown), or separate labels could be provided on the different right and left front sides.
FIG. 11 shows another alternative container 10e. As with similar containers 10a, 10b, 10c and 10d, container 10e is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with an “e” added thereafter. It will thus be appreciated that container 10e has a generally polygonal (rather than rectangular or square) base 12e (shown in profile) with a long right front side 14e, a short left front side 16e, a long left back side 18e and a short right back side 20e extending upwardly therefrom. Connecting sides 14e, 16e, 18e and 20e are bevel (flat) transition portions 70. It will be appreciated that bevel transition portions 70 have a horizontal length dimension which is smaller than a horizontal length dimension of shorter sides 16e, 20e; but alternatively these lengths could be equal or the short sides shorter than the bevel transition portions. In any event, container 10e is generally polygonal shaped, in this case with eight sides (of three different dimensions), and container 10e could also have other numbers of sides as desired (such as 6, or even 5 or 7, etc. sides). It will also be appreciated that container 10e is depicted with a pass-through handle 50e provided in the corner as shown and that this handle 50e can be similar to any of the previously above-described handles 50 and could be located in any corner.
FIG. 12 shows another alternative container 10f. As with similar containers 10a, 10b, 10c, 10d and 10e, container 10f is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with an “f” added thereafter. The most significant difference between container 10f and the previous containers is that container 10f has only three sides: a back left side 18f, a back right side 20f and an arcuate front side which in this embodiment is a semi-circular front side 74. With this construction, lid 30f is still circular shaped as shown. It will also be appreciated that container 10f is depicted with a pass-through handle 50f provided in the only corner, and that this handle 50f can be similar to any of the previously above-described handles 50.
FIG. 13 shows another alternative container 10g. As with similar containers 10a, 10b, 10c, 10d, 10e and 10f, container 10g is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with a “g” added thereafter. Container 10g is most similar to container 10f, but instead of semi-circular side 74, container 10g has a third front side 76 as shown and thus has a triangular footprint. In this embodiment, container 10g is shown with corner 48g forming a right angle, so that front side 76 is longer than the other two sides. However, it will be appreciated that all three sides could all be equal or all be different as desired. It will also be appreciated that container 10g is depicted with a pass-through handle 50g provided in corner 48g, but handle 50g could be provided in either of the other two corners; and that this handle 50g can be similar to any of the previously above-described handles 50.
FIGS. 14-19 show another alternative container 10h. As with similar containers 10a, 10b, 10c, 10d, 10e, 10f and 10g, container 10h is generally similar to container 10 and thus similar elements when discussed will be identified with the same numbers but with a “h” added thereafter. In this embodiment, the vertical portions 93, 95 of sides 18h and 20h forming opening 61h are relatively flat and only come to a small peak adjacent handle 50h. In addition, below opening 61h, a lower portion of each side 18h and 20h includes a concavity 99 formed therein all of the way down to base 12h. With concavities 99, container 10h still has a generally square footprint, particularly as corner 48h has a profile the same as the other corners. It will be appreciated that concavities 99 makes the molding of container 10h somewhat easier, besides also providing a pleasing and unique appearance.
As shown, container 10h has a pass-through handle 50h provided in corner 48h which is somewhat shorter in size, both in height and perimeter, than the other handles 50 so that there is some small savings in the material used for handle 50h and hence the overall weight of container 10h. In particular, it will be noted that handle 50h is generally rectangular shaped in cross section, and the outermost handle side 49 is offset inwardly from the remaining portions of corner 48h. With this sized and configured handle 50h, the use of a thumb receiving cavity above handle 50h is considered advantageous; and such a thumb receiving cavity 64h is shown in the alternative embodiment of container 10h′ shown in FIG. 20 which is otherwise the same as container 10h. Of course, it will be appreciated that handle 50h can be similar to any of the previously above-described handles 50 if desired.
In the lateral center of shoulder 42h and rim 34h above each side 14h and 16h, and hence in top 24h adjacent opening 28h, there is provided a recess 97. Each recess 97 provides a small finger reception area by which engagement with lid 30h by a finger of a user moving upwards during removal of lid 30h is facilitated. It will be appreciated that a recess 97 could also be provided above each side 18h and 20h as well, either additionally or alternatively, though it is believed that the location of recesses in sides 14h and 16h is the most convenient for a user who is grasping handle 50h at the time.
It will also be noted that sides 14h and 16h includes both vertical ribs 86h and horizontal ribs 88h which are slightly indented from the remainder; and that horizontal ribs 88h are bordered by outstanding convex ribs 89. Vertical ribs 86h are located in the corners between sides 20h and 14h and sides 16h and 18h, and vertical ribs 86h extend from an intersection with the lowermost of horizontal rib 88h up to and beyond the uppermost horizontal rib 88h and hence into shoulder 42h. Horizontal ribs 88h extend from the noted corners and around the corner between sides 14h and 16h, and horizontal ribs 88h also extend somewhat beyond the corners between sides 20h and 14h and sides 16h and 18h. It will be appreciated that vertical ribs 86h and horizontal ribs 88h form well-sized label (or graphics) receiving areas 66h. 
Although the preferred embodiments of the containers have been depicted with handles which are generally offset somewhat vertically towards the base, other locations of the handles would be possible. Thus, each handle could instead be located vertically more toward the midway point or even offset toward the top. It would even be possible for the handle to extend almost all of the way from the top to the bottom.
It will also be appreciated that the particular features (or lack thereof) of one embodiment could also be used with or incorporated into other embodiments; i.e., the various features of the embodiments are interchangeable. For example, the handle of any one embodiment could be used in place of a different handle in any of the other embodiments, or the thumb receiving cavity used with any handle, besides the ones depicted, etc. Further, an embodiment having particular features could be configured without one or more such features in the manner shown in other embodiments.
While the present invention has been described with respect to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that variations and modifications can be effected within the scope and spirit of the invention.

## Claims

1. A plastic container for a particulate product, said container comprising:
a generally square base and respective first, second, third and fourth sides upstanding from said base, the second and third sides having at least portions which are generally flat,
a top which connects with said first, second, third and fourth sides, said top including an opening therein which is large enough in diameter to allow a person's hand to pass therethrough to permit removal of the particulate product,
a shoulder extending upwardly and inwardly from the sides, a rim extending up from the top of the shoulder to the top opening, a line extending over the shoulder from the juncture of the sides and the shoulder to the top of the rim forming an angle of less than 40° with a vent line extending up from the sides, at least at some points along said sides,
and including a pass through handle located in the vicinity of the corner adjacent the fourth and first sides, which handle includes a generally vertical segment and a pass through opening extending from the first side to the fourth side and located interiorly of the vertical segment and large enough to permit a person's hand to pass therethrough to grasp the vertical segment, and
wherein said top opening extends over a portion of said vertical segment.

2. A plastic container as claimed in claim 1, wherein said opening is centered on said generally square base.

3. A plastic container as claimed in claim 1, wherein said handle has a vertical length of at least about 2.5′′ and a width to thickness ratio of about 1.0 to 1.2.

4. A plastic container as claimed in claim 1, wherein said vertical segment defines a hollow cavity having a top end and a bottom end, both of which are in communication with the remainder of the interior of the container.

5. A plastic container as claimed in claim 4, wherein said hollow cavity of said handle tapers slightly inward from the bottom to the top.

6. A plastic container as claimed in claim 5, wherein said hollow cavity tapers about 3°.

7. A plastic container as claimed in claim 1, further including a thumb receiving concavity located above said handle.

8. A plastic container as claimed in claim 7, wherein said vertical segment includes vertically spaced concavities on an inwardly directed part thereof.

9. A plastic container as claimed in claim 1, wherein at least one of said sides includes vertical ribs.

10. A plastic container as claimed in claim 1, wherein at least one of said sides includes horizontal ribs.

11. A plastic container as claimed in claim 1, wherein said top opening is sufficiently wide to receive about a 5′′ diameter cylinder therethrough.

12. A plastic container as claimed in claim 1, wherein a lower portion of said first and fourth sides includes a respective concavity extending horizontally therealong and upwards from said base.

13. A plastic container as claimed in claim 1, wherein the second and third sides include label receiving areas indented from a remainder of a respective said side.

14. A plastic container as claimed in claim 1, wherein said first, second, third and fourth sides are horizontally connected to respective adjacent said sides by respective flat transition portions which have a horizontal dimension less than a horizontal dimension of a shortest said side.

15. A plastic container as claimed in claim 1, wherein said handle is vertically located generally offset toward said base.

16. A plastic container as claimed in claim 1, further including:
an air-tight sheet which covers said opening, and
a one-way vent carried on said sheet which allows pressure within the container to be vented to atmosphere.

17. A plastic container as claimed in claim 1, wherein said container is made primarily of HDPE and has a design effectiveness, defined as a maximum top load in pounds times a volume in liters both divided by a weight in grams, of at least about 5.0.

18. A plastic container as claimed in claim 1, wherein a lower portion of said first and fourth sides includes a respective concavity extending horizontally therealong and upwards from said base.