DRINKING CUP

Abstract

A doublewalled, throw-away, drinking cup having the outer sidewall extending from a rolled top edge down to the bottom edge of the cup on which the cup can stand. An inverted cup has walls extending around a recessed bottom surface. An inner side wall is secured to the outer sidewall and formed with a rolled top edge at the upper end and a bottom projection at the lower end which is hemmed up around the upstanding sidewall of the inverted cup so as to engage the recessed bottom surface. The outer sidewall has an outer sidewall extension at the lower end which is hemmed up about the bottom projection of the inner sidewall to engage the recessed bottom surface of the inverted cup. The rolled top edge of the cup has a diameter of 90 mm. which conforms to the size of typical drinking cup tops.

Claims

1. A doublewalled, throw-away, drinking cup having: the outer sidewall extending from a rolled top edge down to the bottom edge of the cup on which the cup can stand; formed of an inverted cup having walls extending around a recessed bottom surface; an inner side wall secured to the outer sidewall and formed with the rolled top edge at the upper end and having a bottom projection at the lower end which is hemmed up around the upstanding sidewall of the cup so as to engage the recessed bottom surface; and the outer sidewall having an outer sidewall extension at the lower end which is hemmed up about the bottom projection of the inner sidewall to engage the recessed bottom surface of the inverted cup.

2. The doublewalled, throw-away, drinking cup of claim 1 wherein the inner and outer sidewalls are secured together with a series of hot glue bead disposed between the inner and outer sidewalls.

3. The doublewalled, throw-away, drinking cup of claim 2 wherein the glue beads are spaced from each other.

4. The doublewalled, throw-away, drinking cup of claim 2 wherein the glue beads are spaced from each other.

5. The doublewalled, throw-away, drinking cup of claim 3 wherein the inner and outer sidewalls are joined together by hot sealing with a machine.

6. The doublewalled, throw-away, drinking cup of claim 2 wherein the inner and outer sidewalls are formed into a flat layout.

7. The doublewalled, throw-away, drinking cup of claim 6 wherein the layout is folded so that a bottom edge of the layout wraps around the inverted cup.

8. The doublewalled, throw-away, drinking cup of claim 7 wherein the layout is folded so that a bottom edge of the layout wraps around the inverted cup; and an open edge of the inverted cup is located at the bottom rim of the cup.

9. The doublewalled, throw-away, drinking cup of claim 8 wherein the cup layout with the inner and outer sidewalls are inserted into a machine and hot sealed together with a longitudinal seam extending from the rolled top edge down to the bottom rim of the cup.

10. The doublewalled, throw-away, drinking cup of claim 9 wherein the rolled top edge of the cup has a diameter of 90 mm. which conforms to the size of typical cup tops.

11. The doublewalled, throw-away, drinking cup of claim 10 wherein the the height of the drinking cup from the rolled top edge to the bottom rim allows for the cups to be stacked into each of other.

12. The doublewalled, throw-away, drinking cup of claim 11 wherein the drinking cups can be stacked into each of other without squashing the cups into each other.

13. A doublewalled, throw-away, drinking cup having: the outer sidewall extending from a rolled top edge down to the bottom edge of the cup on which the cup can stand; formed of an inverted cup having walls extending around a recessed bottom surface; an inner side wall secured to the outer sidewall and formed with the rolled top edge at the upper end and having a bottom projection at the lower end which is hemmed up around the upstanding sidewall of the cup so as to engage the recessed bottom surface; the outer sidewall having an outer sidewall extension at the lower end which is hemmed up about the bottom projection of the inner sidewall to engage the recessed bottom surface of the inverted cup; and the rolled top edge of the cup has a diameter of 90 mm. which conforms to the size of typical cup tops.

14. The doublewalled, throw-away, drinking cup of claim 13 wherein the inner and outer sidewalls are secured together with a series of hot glue bead disposed between the inner and outer sidewalls.

15. The doublewalled, throw-away, drinking cup of claim 14 wherein the glue beads are spaced from each other.

16. The doublewalled, throw-away, drinking cup of claim 3 wherein the inner and outer sidewalls are joined together by hot sealing with a machine.

17. The doublewalled, throw-away, drinking cup of claim 13 wherein the inner and outer sidewalls are formed into a flat layout.

18. The doublewalled, throw-away, drinking cup of claim 17 wherein the layout is folded so that a bottom edge of the layout wraps around the inverted cup.

19. The doublewalled, throw-away, drinking cup of claim 18 wherein the layout is folded so that a bottom edge of the layout wraps around the inverted cup; and an open edge of the inverted cup is located at the bottom rim of the cup.

20. The doublewalled, throw-away, drinking cup of claim 19 wherein the cup layout with the inner and outer sidewalls are inserted into a machine and hot sealed together with a longitudinal seam extending from the rolled top edge down to the bottom rim of the cup.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The structure, operation, and advantages of the present invention will become further apparent upon consideration of the following description taken in conjunction with the accompanying figures (Figures). The figures are intended to be illustrative, not limiting.

[0013] Certain elements in some of the figures may be omitted, or illustrated not-to-scale, for illustrative clarity. The cross-sectional views may be in the form of slices, or near-sighted cross-sectional views, omitting certain background lines which would otherwise be visible in a true cross-sectional view, for illustrative clarity.

[0014] Often, similar elements may be referred to by similar numbers in various figures (Figures) of the drawing, in which case typically the last two significant digits may be the same, the most significant digit being the number of the drawing figure (Figure).

[0015] FIG. 1 is a three dimensional view of a doublewalled, drinking cup, in accordance with the present invention.

[0016] FIG. 2 is a partial side, cross sectional view of a drinking cup, in accordance with the present invention.

[0017] FIG. 3 is a three dimensional view of a bottom cup of a doublewalled, drinking cup, in accordance with the present invention.

[0018] FIG. 4 is a side view of a doublewalled, drinking cup prior to rolling into a cup shape, in accordance with the present invention.

[0019] FIG. 5 is a side view of a group of stacked doublewalled, drinking cups, in accordance with the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0020] In the description that follows, numerous details are set forth in order to provide a thorough understanding of the present invention. It will be appreciated by those skilled in the art that variations of these specific details are possible while still achieving the results of the present invention. Well-known processing steps are generally not described in detail in order to avoid unnecessarily obfuscating the description of the present invention.

[0021] In the description that follows, exemplary dimensions may be presented for an illustrative embodiment of the invention. The dimensions should not be interpreted as limiting. They are included to provide a sense of proportion. Generally speaking, it is the relationship between various elements, where they are located, their contrasting compositions, and sometimes their relative sizes that is of significance.

[0022] In the drawings accompanying the description that follows, often both reference numerals and legends (labels, text descriptions) will be used to identify elements. If legends are provided, they are intended merely as an aid to the reader and should not in any way be interpreted as limiting.

[0023] The cups being described by way of example are vacuum formed from a high inpact sheet polystyrene although other plastics materials could be used.

[0024] Referring to FIG. 1, there is shown a doublewalled, throw-away, drinking cup 10 having an outer side wall 12 leading to a bottom rim 14 on which the cup can stand, and a recessed bottom surface 16. An outer sidewall 12 extends from a rolled top edge 20 down to the bottom edge of the cup 10, as shown in FIG. 3, formed with an upstanding sidewall 24 and a closed bottom 16. The inner side wall 18 hems around the upstanding sidewall 24 of the cup 22 with an extension 18a of the inner sidewall.

[0025] An extension 12a of the outer side wall 12 hems up and over the outer sidewall 12 which is hemmed about the inner surface of the sidewall 24 of the cup 22. The inner and outer sidewalls 12 and 18 are secured together with a series of hot glue bead disposed between the inner and outer sidewalls 12 and 18. The glue beads are spaced from each other.

[0026] The cup 22 and inner and outer sidewalls 12 and 18 are joined together by hot sealing with a machine.

[0027] The inner and outer sidewalls 12 and 18 are formed into a flat layout 26 as shown in FIG. 4. Then, the layout 26 is folded so that the bottom edge of the layout wraps around the cup 22 as shown in FIG. 2. The open edge 23 of the cup, is located at the to a bottom rim 14 of the cup. The layout 26 of the cup 22 and the inner and outer sidewalls 12 and 18 are then inserted into a machine and hot sealed together with a longitudinal seam extending from the rolled top edge 20 down to the bottom rim 14 of the cup 22.

[0028] The diameter of the rolled top edge 20 is preferably 90 mm. which conforms to the size of typical tops. An important aspect of the present invention is that the top edge of the cup is sized to receive a top with a 90 mm diameter. At the same time, the height of the cup 22 from the rolled top edge 20 to the bottom rim 14 is the same while allowing for the cups to be preferably stacked into each of other as shown in FIG. 5 without squashing the cups into each other.

[0029] The upper portion of the side wall 12 is doubled back upon itself and bent slightly inward so as to form at the upper edge 20 an inwardly projecting annular rib. When, therefore, two similar containers are nested, as shown in FIG. 5, an insulating chamber 6 is formed between the bottoms of the two containers, and with this form of construction there is formed in addition, two auxiliary bottom insulating chambers by the spaces between the two plies of each container.

[0030] In order to improve the sealing and to already, for example, achieve a certain attachment of the inner cup with respect to the outer cup or at least a fixing in the relative position, the inner edge flange can at least partially circumferentially grip the outer edge flange. The circumferential gripping effect can be realised in various ways. In one embodiment the outer edge flange is relatively loosely gripped circumferentially by the inner edge flange so that the mutual support of the edge flanges essentially only serves the positioning of the inner cup in the outer cup.

[0031] If the container is of frusto-conical shape, then when the receptacle is formed by the nesting of the containers, an insulating chamber is formed between the bottoms of the two containers. The receptacle of this invention thus thermally insulated at the side walls, and of the frusto-conical shape also at the bottom is preferably closed by a cover containing an insulating chamber and thus the receptacle is well thermally insulated at the sidewalls, at the bottom, and at the top.

[0032] Although the invention has been shown and described with respect to a certain preferred embodiment or embodiments, certain equivalent alterations and modifications will occur to others skilled in the art upon the reading and understanding of this specification and the annexed drawings. In particular regard to the various functions performed by the above described components (assemblies, devices, etc.) the terms (including a reference to a means) used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (i.e., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary embodiments of the invention. In addition, while a particular feature of the invention may have been disclosed with respect to only one of several embodiments, such feature may be combined with one or more features of the other embodiments as may be desired and advantageous for any given or particular application.