US3411692A - Container - Google Patents

Description

.E. G. MATHEWS CONTAINER Nov. 19, 1968 3 Sheets-Sheet 1 Filed Nov. `8, 1965 fra/7%? [azz/arddefzfaZ/zews Nov. 19, 1968 E. G. MATHEws CONTAINER s sheets-Sheena Filed NOV. 8, 1965 Q @MJ/MMM 2% NOV 19, 1968 E. G. MATHEws 3,411,692

CONTAINER Filed Nov. 8, 1965 5 Sheets-Sheet 3 United States Patent O 3,411,692 CONTAINER Edward Gilbert Mathews, Guilford, Conn., assignor to Federal Paper Board Company, Inc., Bogota, NJ., a corporation of New York Filed Nov. 8, 1965, Ser. No. 506,769 6 Claims. (Cl. 229-21) ABSTRACT OF THE DISCLOSURE A collapsible container formed from a cut and scored blank of paperboard or similar foldable sheet material which is characterized by a tubular body, when set up, having an open top with a circular cross section and a bottom wall structure which comprises panels integrally hinged along straight lines to the bottom edge of the body and automatically foldable inwardly between the body side Walls when the latter are collapsed.

This invention relates to p-ackaging and is more particularly concerned with improvements in a container which is adapted to be formed of paperboard with a generally cylindrical shape and which is especially useful for the packaging of certain types of products which are in a liquid, semi-liquid or granular state and can be flowed into the open top of the container and subsequently dispensed therefrom.

One form of container which has been used for many years in the packaging of certain products, for example, bulk ice cream, comprises a cylindrical body, initially open at both ends, with a pair of axial scores so that it may be collapsed into iiattened condition for shipment and adapted to be opened up to receive top and bottom closures comprising circular discs held within annular metal bands which engage collars on the ends of the tubular body to hold the top and bottom closure discs in position. This container has been widely used in the marketing of ice cream in quantities required for soda fountain or the like use, that is, two and one-half gallons, three, three and one-half or live gallons, for example, and the many advantages of this container, particularly in the packing, shipping, handling and dispensing of ice cream products, have been recognized. However, the use of the metal bands and the separate closure Idiscs greatly increases the cost of storage, shipping and handling of the container. Also, setting up the container requires substantial time and labor, when it is done manually, or the use of relatively expensive setup machinery is required for automatic handling. These and other objections to the container have restricted its use to some extent and it has long been recognized that redesign of this container so that it could be produced and handled with greater economy would be highly desirable. It is an object of the present invention, therefore, to provide a container of this type which may be more economically produced, which retains the desirable features of the cylindrical containers now in use, and which has additional advantages, particularly in the handling of products such as ice cream.

lt is a more specific object of the invention to provide an improved container of the type described which is fabricated from a paperboard blank in initially flattened condition and which incorporates at least one end closure comprising integral panels which are connected so as to automatically open up into end closing position upon separating the flattened side walls and `forming the same into a substantially tubular body, with an open end adapted to receive a circular closure member which may be held in place by an annular metal band engage- 3,411,692 Patented Nov. 19, 1968 ICC ing a collar on the side wall or which has a peripheral rim for engaging the collar in a like manner.

It is a still more specific object of the invention to provide a paperboard container which is fabricated from a single blank cut and scored so as to provide a tubular body with closure panels integrally hinged to one end thereof and connected so as to fold upon each other between the side wall forming panels in the collapsed position of the tubular body and when the container is opened up having a periphery which is characterized by straight edge portions hinged to like portions at the bottom edge of the' side wall, and with the side Wall sections adjoining the hinge lines merging from a flat faced condition into a round faced contour adjacent the open top end of the body.

It is a still further object of the invention to provide a cylindrical container of the type described having bottom forming panels and glue flaps which are initially connected and folded to a fiat position where they are embraced by the flattened body side walls and which can -be pushed outwardly to form a strong flat bottom in the erected container and which bottom panels include a dust flap for rendering the bottom sufficiently tight to hold viscous semi-fluids, such as, ice creams or powders.

It is another object of the invention to provide a cylindrical container formed from a single blank which is cut and scored to divide the same into side wall forming panels and integral bottom wall forming panels which are hinged to the bottom edge of the side Wall panels along straight hinge lines, the container being constructed and arranged initially in a dat folded condition for delivery to the user and being easily opened by spreading the side walls and hinging the bottom into flat operative position in a transverse plane and the container being adapted to be filled and closed by application of a flat circular top or cover of any suitable construction, for example, a disc held within a metal band which engages a collar on the side wall or a disc having a peripheral rim which can be telescoped into or over margins of the body at the mount thereof.

Another object of the invention is to provide a cylindrical container `of the type described which is preferably fabricated `from paperboard, for example, kraft manila lined chipboard, which is formed from a blank cut and scored to provide a pair of rectangular side wall panels, an end glue flap a-dapted to be glued to the opposite side edge so as to form a tube when the side wall panels are forced apart, integral bottom forming panels foldable along score lines defining a bottom edge of the side wall and including, in the order named, an outer bottom panel consisting of at least one-half of the bottom area and a glue ap extending from a central score or slit line, a triangular panel, a polygonal panel having a panel glue flap foldable along the score line, a full inner bottom dust panel to which the outer bottom panel is glued so as to fold along a diametrical hinge line, a second triangular panel, and a second polygonal panel having a panel glue flap foldable along a score line, with the glue flap on the side wall panel having a diagonal edge and the inner bottom panel having a triangular locking tab foldable along an edge forming score line so as to bring an oppositely disposed edge into position for engagement with the diagonal bottom edge of the glue ap when the container is erected, thereby to lock the -bottom panels in operative position.

Another object of the invention is to provide a container having a cylindrical side wall which is formed from a single paperboard blank, cut and scored so as to provide, when connected, side wall panels which are free at one edge and form, when opened up, a circular top wall section with integral bottom wall panels which are hinged to the other edge along straight lines so that when they are folded into operative position they constitute a bottom having a periphery characterized by a plurality of intersecting straight edge portions with the bottom sections of the body side wall which adjoin the bottom straight edge portions tapering upwardly in an outward direction and with intervening side 4wall portions tapering upwardly in an inward direction from the points of intersection of the straight bottom edge portions whereby the flat faced portions at the bottom margin of the side wall merge into the circular top section thereof and minimum wall contact results when a plurality of the containers are grouped in side-by-side relation.

A further object of the invention is to provide a container having a cylindrical side wall which is formed from a single paperboard blank, cut and scored so as to provide, when connected, side wall panels which are free at one edge and form, when opened up, a circular top wall section with integral bottom wall panels which are hinged to the other edge along straight lines so that when they are folded into operative position they constitute a bottom having a hexagonal periphery with the sections of the body side wall which adjoin the straight edge portions tapering upwardly iirst in an outward di rection and then in an inward direction so as to merge the flat faces at the bottom margin into the circular top section of the body side wall whereby when a plurality of the containers are grouped in side-by-side relation predetermined minimum contact between the side walls of adjoining containers is assured.

These and other objects and advantages of the invention will be apparent from a `consideration of the several forms thereof which are hereinafter described and illustrated in the drawings wherein:

FIGURE l is a perspective view of a container in setlup condition which embodies therein the principles of the invention;

FIGURE 2 is a horizontal section, taken on the line 2-2 of FIGURE 1;

FIGURE 3 is a vertical section taken on the line 3 3 of FIGUR-E 2, the view showing a top closure lid in position for application to the open top of the container;

FIGURE 4 is a plan view of a flexible paperboard blank employed in fabricating the container, the view illustrating the manner in which the blank is died out and creased, preliminary to the folding and gluing operations;

FIGURE 5 is a plan view of the blank of FIGURE 4, following initial folding of certain bottom members thereof and showing the application of glue prior to further folding operations;

FIGURE 6 is a plan view, with portions broken away, of the Icontainer in its completed flattened out condition;

FIGURE 7 is a perspective view, of a modied form of the container;

FIGURE 8 is a perspective View, of a further modified form of the container;

FIGURE 9 is a horizontal section taken on the line 9-9 of FIGURE 8;

FIGURE 10 is a plan view of the paperboard blank employed in fabricating the container of FIGURE 8, the blank being died out, creased and having glue applied preliminary to the folding and gluing operations; and

FIGURE 11 is a plan view, with portions broken away, of the container in its completed flattened out condition.

The container will be best understood by reference to the preferred manner in which it is formed and set up. Referring first to FIGURE 4, the improved container is fabricated from a ilat blank 10y of flexible paperboard, of suitable gauge or thickness, which is subdivided by parallel, transverse crease lines 11 and 12 and longitudinally extending parallel crease lines 13 and 14 into successive integrally hinged wall forming panels 15, 16 and 17 which constitute the main portion of the blank and which are adapted to form the side wall of the container body when setup. An edge reinforcing ap 18 y'extends along one side margin of the blank outwardly of crease line 13 and is adapted to hinge inward about the longitudinal crease line 13 so as to fold down and be secured against the adjacent outside face thereof. The longitudinal crease line 14 defines a bottom edge of the side wall forming panels 15, 16 and 17 and forms a hinge line for a series of integral bottom wall or end closure forming panels which extend laterally of the main portion of the blank and of the longitudinally crease line 14.

Panel 20, which is the largest of the bottom forming panels and which constitutes an inner dust panel, is hexagonal in shape with six straight sides or edges 21, 22, 23, 24, and 26 which determine the outline of the bottom wall of the container in setup position. The one side edge 21 of the panel 2() is integrally hinged on a line coinciding with a central portion of the score line 14 which defines the bottom forming edge of the one side wall panel 16. The panel edges 21, 22, 23, 24, 25 and 26 are substantially equal in length and this dimension is slightly greater than one-third the longitudinal dimension of the panel 16. A generally triangular shaped panel `or flap 27 extends `from the bottom forming edge of the panel 16 at one side of the bottom panel 20 and is hinged to the panel 16 on a line coinciding with the portion 28 of the score line 14. At the other side of the panel 20 a flap 29 is hinged to the panel 16 along a line coinciding with a portion 30 of the score line 14. The panels 27 and 29 are separated from the panel 20 by outwardly opening, V-shaped slots 31 and 32 having the apices thereof at the ends of the hinge line 21. The panel 29 is subdivided by a score line 33 which extends diagonally outwardly from the intersection of the transverse score line 12 with the longitudinal score line 14 and is approximately in alignment with the outer edge 23 of the panel 20. The two portions of the panel 29 are generally triangular shaped with the outer portion 34 constituting a glue flap or tab adapted to be connected to adjoining panel 35 `from which it is separated by a narrow, outwardly opening, V-shaped slot 36. The panel 35 is generally triangular in shape and is hinged to the bottom forming edge of the side wall panel 17 on a hinge line 37 coinciding with a portion of the longitudinal score line 14 and extending in the neighborhood of one-half of the length of the panel 17 in the longitudinal direction of the blank. A generally rectangular panel 38 extends from the end portion 39 of the score line 14, laterally of the panel 17, and this panel has a narrow glue ap 40 extending beyond the score line 41 which is adapted to be hinged about the latter and adhered to the outside yface of the bottom wall panel 20. The scorel line 41 is parallel with and spaced from the hinge line 39 a distance corresponding approximately to one-half the dimension in the lateral direction of the panel 20. As indicated in phantom line the panel 38 may be hexagonal and approximately the same size as the panel 20 which in effect extends the glue flap 40; At the other end of the blank a panel 42 extends laterally of the hinge line 43 which coincides with the end portion of longitudinal score line 14 and defines a bottom edge of theend side wall panel 15. The panel 42 has a generally triangular extension 43 forming a glue tab which is separated from the main body of the panel by the score line 44. The' glue tab 43 is adapted to be secured to the adjoining triangular shaped panel 27 from which it is separated by an outwardly opening, generally V-shaped slot 45 with the edge of the panel 27 which defines one side of the slot being generally aligned with the edge 25 of the inner dust panel 20. Preferably, the dust panel 20 has a small triangular locking tab 46 along the one edge 24 for co-operation with the bottom edge 47 of the glue flap portion of the panel 17, when the container is set up, as shown in FIGURE 3.

To form the container from the blank of FIGURE 4, glue is applied and the panels are folded as illustrated in FIGURES 5 and 6. Initially the edge reinforcing flap 18 may have glue applied to its yface so that it can be folded back onto the main body of the panels 15, 16 and 17 and secured thereto to form an outer reinforcing rim around the -mouth of the completed container. The flap 18 may, of course, be glued or folded at a later stage in the gluing and folding operations. The bottom wall forming panels 20, 27, 29, 35, 38 and 42 are all folded onto the inside face of the side wall portions of the blank about their respective hinge lines 21, 28, 30, 37, 39 and 43 which brings these panels into the position shown in FIGURE 5, the glue flaps 34, 43 and 40 being folded back on the score lines 33, 44, and `41 with gl-ue applied to the outside faces thereof indicated in FIGURE 5. Glue is applied on the outside face of the flap forming marginal portion 48 of the wall panel 17 and the wall panels 17 and are then folded about the score lines 12 and 11, respectively, and in the sequence indicated, which brings the end margin of the panel 15 into overlapping relation on the glued marginal end portion 48 of the panel 17 and completes the fabrication of the container which then appears in the knockeddown condition shown in FIGURE 6.

The container is set up by applying a force to the edge folds 11 and 12 in the direction of the center assembly or by spreading apart the wall panels 15, 17 and 16 to open up the side wall into generally cylindrical shape with the bottom wall forming panels being automatically pulled by the opening of the side wall panels or by pushing outwardly thereon into coplanar relation and end closing positions. The end closure thus formed automatically upon opening up the side wall panels constitutes a multipanel bottom wall with each of the six straight side edges corresponding to or extending along one of the edges 21, 22, 23, 24, 25 and 26 of the inner bottom wall panel 20 which is disposed on the inside of the container and forms a smooth inside bottom. A circular cover 49 of moldable material with an integral rim 50 may be employed with the container or a conventional disc and metal rim cover may be applied to close the open top. The empty container may be collapsed, when desired, by merely pushing in -on the bottom end wall to start the folding of the panels after releasing the locking tab 46. The side wall will collapse on the hinge lines 11 and 12 while the web portions and the bottom panels will fold inwardly between the side Wall panels.

The inside bottom panel 20 is proportioned so that its maximum diameter, that is, the distance between each pair of oppositely disposed apices of lthe angles formed by the intersection of adjacent side edges is somewhat greater than the cross sectional diameter of the main portion of the body of the container, as shown in FIG- URE 2, and when the container body is set up this results in an outward bowing of the material in the side wall sections adjacent the point of intersection of adjoining bottom edges as shown in FIGURE 3. The points on the periphery of the panel 20 which are formed at the intersection of the adjoining edges of this panel force the side wall material outwardly beyond the normal circumference of the tubular body resulting in a bottom diameter extending between oppositely disposed points which is greater than the cross sectional diameter of the body thereof. This, when taken with the tapered contour, in the axial direction of ,the side walls, which results from the merging of the at bottom portions into the rounded upper portions, provides the container with an advantage which is desirable in connection with the use of the container for bulk ice cream. As a result of the construction of the container and the different contour of the side walls at the top and bottom endswhen the containers are palletized after being lled so that they are arranged in side-by-side relation there is a minimum of wall contact between adjacent containers which facilitates the circulation of cold air in the freezing room and enables the temperature to be reduced more rapidly, thus saving several hours in the relatively lengthy process of freezing after the containers are filled with the freshly made ice cream which is in a semi-liquid state.

A modied form of the container is illustrated in FIG- URE 7. In this form of the container, in order that the top portion of the side walls will more readily assume a circular shape when opened up, a series of relatively closely spaced scores are formed in the upper margin forming portions of the side wall panels as indicated at 51. The scores 51 increase the tendency of the paperboard material to form a curved contour when pressure is applied to the edges of the panels at the fold lines 11 and 12 in setting up the container and to make it easier for the material in the side wall panels to merge from the tlat face condition along the straight edges at the bottom into the curved circular side wall forming condition or contour desired at the top of the container. The score line 51 are shown as extended approximately half the depth of the side wall. They may, however, be extended farther towards the bottom if desired.

Another modied form of the container is illustrated in FIGURES 8 to ll. In this form of the container, the one end of the tubular body is provided with integral panels which are connected to each other so as to form a square shaped bottom when the tube is opened up. This form of the container is fabricated from a flat blank 60 (FIGURE l0) of flexible paperboard which is divided by parallel, transverse crease lines 61 and 62 and longitudinally extending parallel crease lines 63 and 64 into successive integrally hinged wall forming panels 65, 66 and 67, which constitute the main portion of the blank and which are adapted to form the side wall of the container body when set up. An edge reinforcing flap 68 extends along one side margin of the blank outwardly of the crease line 63 which is adapted to hinge inwardly about the longitudinal crease line 63 so as to be secured by a suitable adhesive against the adjacent outside face thereof. The longitudinal crease line 64 defines the bottom edge of the side wall forming panels 65, 66 and 67 and also forms a hinge line for the integral bottom wall forming panels 70, 71, 72 and 73. The panel 70, which constitutes an inner dust panel, is square and determines the shape of the bottom. It is hingd on the portion 74 of the score line 64, with the length of the hinge line 74 being approximately one-half the length of the panel 66. The panel 71 extends from the bottom forming edge of the side wall panel 65 and is hinged to the panel 65 on a line 75 coinciding with a portion of the score line 64. The panel 71 has a dimension laterally of the blank which is approximately one-half th corresponding dimension of the panel 70 and is subdivided by a score line 76 which extends diagonally outwardly from the intersection of the transverse score line 61 with the longitudinal score line 64 so as to divide the panel 71 into a triangular shaped main portion 77 and a triangular shaped glue tab 78, the latter being adapted to be supplied with glue on the inner face of the blank so that it may be folded back about the score line 76 and secured to the inwardly folded panel 70 in fabricating the container. At the other side of the panel 70 the panel 72 extends laterally of the blank 64 and has asize and shape corresponding to the panel 71. Panel 72 is hinged to the panel 66 on the hinge line 80 which coincides with the score line 64. The diagonal score line 81 divides the panel into a triangular shaped main portion 82 and a glue tab 83 of the same shape. The rectangular panel 73 which is approximately one-half the size of the panel 70 extends laterally from the bottom edge of the side wall panel 67 and is hinged thereto on a line coinciding with a portion 84 of the score line 64. The panels 72 and 73 are hingedly connected by means of the glue tab 83 in the same manner as panels 70 and 71.

In forming the container from the blank 60 the panels 70, 71, 72 and 73 are folded about their hinge lines 74, 75, 80 and 84, respectively onto the side Wall panels 65, 66

and 67 with the glue tabs 78 and 83 being coated with an adhesive and folded back about the hinge lines 78 and 81, respectively. The side wall forming panels 65 and 67 are then folded inwardly about the score lines 61 and 62 so as to bring the adhesive coated glue ap forming marginal portion 85 which extends along the free end of the side wall panel 67 into overlying relation with the end margin of the panel 65 so as to form the container in flattened and collapsed condition as shown in FIGURE l1. The edge reinforcing flap 68 is folded about the hinge line 63 into engagement with the side wall panel and secured thereto prior to the folding of the side wall panels 65 and 67. The resultant container is set up in the same manner as the container of FIGURE l with the side wall forming panels being pulled apart and the bottom wall forming panels being pushed into a plane extending transversely of the axis of the tubular body. The uppermost portion of the container body can be closed by a circular lid when the container is filled while the bottom retains its square shape. The container has the desired circular cross section at the top and merges into a square cross section at the bottom permitting the use of the hinged aps or panels for the bottom closure with the bottom forming panels being connected in automatic bottom forming relation or, if desired, they may remain free when the side wall panels are folded so as to enable them to be overlapped and secured together, by glue or other fastening means, when the container is set up preparatory to filling, in which event the bottom wall forming panels may be made rectangular or square, if desired.

I claim:

1. A collapsible carton comprising a side wall formed of a rectangular panel, the ends of which are overlapped and secured so as to form, when set up, a cylindrical body which has a circular cross section at the top and a polygonal cross section at the bottom, said side wall being collapsible into flattened condition along a pair of oppositely disposed, axially extending score lines, and a bottom wall formed of a series of interconnected panels integrally hinged to the bottom edge of the side wall panel, said bottom wall panels including an inner polygonal panel connected along a straight hinge line to a portion of the bottom edge of the side wall panel, an outer panel connected to the bottom edge of the side wall panel along a straight hinge line which is parallel with and opposite the hinge connection of the inner panel and having a glue ap foldable along a hinge line which falls on a bottom diameter parallel with and centered between the hinge connections of said inner and outer panels with the side wall panel, and two pairs of panels, each pair thereof having two adjacent overlapped and interconnected panels which are connected to the bottom edge of the side wall panel on adjoining straight hinge lines extending between corresponding ends of the hinge lines which connect said inner and outer panels with the side Wall panel and said overlapped and interconnected panels extending from a common hinge line which is in alignment with said centered hinge line, and said bottom wall will collapse inwardly and fold on said centered hinge line upon pressing inwardy on the bottom wall panels as the side wall is collapsed.

2. A collapsible cylindrical container comprising, in erected condition, a body formed by a pair of rectangular side wall panels connected at their ends by an integral glue ap on the one panel which overlaps the free margin of the other panel so as to form a tube having a section of circular cross section adjacent the open top and a section of hexagonal cross section adjacent the bottom end, and a series of bottom wall forming panels integrally hinged to the bottom edges of said side wall panels along straight hinge lines of approximately equal length, said bottom Wall panels including an inner panel of hexagonal shape hinged along one side thereof to a center portion of the bottom edge of the one side wall forming panel, an outer panel connected along a parallel, oppositely disposed hinge line to the center portion of the bottom edge of the other side wall forming panel and having a glue ap connected thereto on a fold forming hinge line which is parallel with the aforementioned hinge lines and extends along a diameter of said bottom wall connecting the points of intersection of the oppositely disposed pairs of side edges of sai-d inner panel which are at opposite sides of the hinge connection of the inner panel with the side wall forming panel, and pairs of 'bottom forming flaps integrally connected in hinged relation to the bottom edges of the side Wall forming panels on opposite sides of said inner side wall panel, the flaps of said respective pairs being hinged to one another by a glue tab liexibly connected to one thereof so as to swing into coplanar relation when the container is erected.

3. A collapsible cylindrical container as recited in claim 2, and the bottom wall of said container having a maximum diameter which is greater than the cross sectional diameter of the body at the open end thereof whereby portions of the side wall adjacent the bottom margins thereof taper inwardly and upwardly in the direction of the top thereof and intervening portions of said side wall taper outwardly and upwardly and into merging relation with the circular section at the top end of the container.

4. A collapsible cylindrical container comprising, in erected condition, a body formed lby a pair of rectangular side wall panels connected at their ends so as to form a tube having a section of circular cross section adjacent the open top and a section of polygonal cross section at the bottom end, with said side wall panels having a pair of oppositely disposed, axially extending, hinge forming creases permitting the panels to be collapsed upon each other into flattened coplanar relation, and a series of bottom wall forming panels integrally hinged to the bottom edges of said side wall panels along straight hinge lines, said bottom wall panels including an inner panel of poygonal shape hinged along one side edge thereof to a portion of the bottom edge of the one side wall forming panel, an outer panel connected along a parallel, oppositely disposed hinge line to a portion of the bottom edge of the other side wall forming panel and connected to the inner bottom wall panel on a fold forming hinge line which is parallel with the aforementioned hin-ge lines and extends along a diameter of said bottom wall connecting the points of intersection of oppositely -disposed pairs of side edges of said inner bottom wall panel and pairs of bottom forming aps integrally connected in hinged relation to portions of the `bottom edge of the side wall forming panels opposite the free edges of said inner and outer bottom wall panels, the aps of said respective pairs being hinged to one another on hinge lines which are in the same axial plane as the hinge line at the connectionof said inner and outer bottom forming panels so that said bottom panels and flaps swing into coplanar relation and automatically form a bottom closing wall when said container is erected.

5. A collapsible container formed from a blank of foldable sheet material which is cut, creased and connected so as to provide, when set up, a tubular body and a bottom closing end wall, the body comprising a pair of rectangular panels joined at corresponding ends along parallel, axially extending, hinge forming crease lines so that the panels may be collapsed upon each other into flattened coplanar relation, said body having a circular cross section at the open end, when opened up, so as to receive a cover having a circular periphery for closing said open end, said bottom end wall comprising pairs of closure forming panels which are connected along straight hinge lines to the bottom edge of the side wall, one of the panels of each pair of said bottom closure panels having a connecting flap which is hinged on a diametrical line in the setup position of the container and connected to the other panel of said pair whereby when the container is collapsed the panels of each pair are adapted to collapse upon each other inwardly of the bottom edges of the side 9 wall panels and are disposed between the side wall panels when the side wall panels are collapsed and said pairs of panels opening up automatically into coplanar bottom wall forming position whenthe side wall panels are spread apart into opened up tubular form.

6. A collapsible container as recited in claim 5 and the bottom wall of said container having a maximum diameter which exceeds the diameter at the open end of the body whereby side wall portions adjacent the bottom margins thereof are bowed inwardly and upwardly in the direction of the top thereof and intervening side wall portions are bowed outwardly and upwardly and merge with the circular top side wall margins.

References Cited UNITED STATES PATENTS Arneson 229-21 Mysels 229-45 Hileman 229-41 Wilson 229-37 Styler 229-41 Rosenburg 229-41 Arneson 229-21 Finn.

Goodyear.

DAVIS T. MOORHEAD, Primary Examiner.

Images