CZ9796A3 - Openable cup with concave bottom provided with stabilizing means - Google Patents

Abstract

The preformed concave bottom (51) of the fold-open goblet, made from a folded rectangular semi-rigid sheet with both halves being superimposed, is a dihedron delimited by the surfaces of two isosceles triangles inscribed within two right isosceles triangles while having a common base and apexes, while a semi-rigid thin lateral strip (36) forming a polygon for supporting the goblet is secured about the gobelet's base when it is unfolded.

Description

Technical field

-'T- i

BACKGROUND OF THE INVENTION The present invention relates to a pull-out cup made of a T-shaped semi-rigid rectangular sheet which is folded into two halves so that the halves rest on one another and their side edges are joined to one another, and the bottom, preformed, forms a concave shape to keep the cup in place. open state.

Background Art

FR-A-2,614,873 discloses a cup of the aforementioned type in which the area under pressure by the fingers holding the cup while it is being carried to the mouth corresponds to the concave area of the greatest distance of the walls of the cup passing through the fold line of the original sheet as well as the random fold lines they can arise when shaping this bottom, especially if this is done by a manually untrained person. All these fold lines form areas of weakening of the concave bottom while holding the cup in the fingers. The cup then tries to return to its original shape and collapse. The collapse of the cup can be prevented by holding it by the side edges, which fix the two halves of the sheet together, but this holding is not a natural position of the hand.

FR-A-2,629,052 then discloses sealing means using stabilizing flaps described in FR-A-2,614,873. This solution is effective but at the same time quite complicated for use by an untrained user.

It is an object of the present invention to provide a collapsible collapsible cup provided with a pre-formed concave bottom which does not exhibit undesirable bends causing warping of the cups described in the above patents. It is also an object of the present invention to provide a cup that facilitates opening by simply pressing the side edges and further providing improved stability in the open state.

SUMMARY OF THE INVENTION

According to its first embodiment, the pre-formed concave bottom of the cup is formed by a wedge defined by the surfaces of two isosceles triangles having a common base and common peaks.

It is a further object of the invention that a semi-rigid thin strip is attached around the base of the cup, the lower edge of which forms a polygon supporting said cup in its open state.

Explanation of the drawings in the drawings

The invention will be further described with reference to specific embodiments with reference to the accompanying drawings, wherein:

1 shows a cut and knurled sheet for forming a cup according to the invention.

Fig. 2 and Fig. 3 show two phases of cup formation and especially its bottom.

Fig. 4 shows a formed cup placed to better display its bottom with this upside down.

FIG. 5 shows a cup according to the invention which has been formed and subsequently folded to reduce its volume and to open it easily.

FIG. 6 shows the same cup according to the invention in an open state.

Fig. 7 shows a folded cup provided with stabilizing flaps.

Fig. 8 shows a cup of Fig. 7 with a deployed bottom.

Fig. 9 then shows a cup according to the invention of Fig. 8 with stabilizing flaps in a position ensuring its equilibrium.

Fig. 10 shows, on the one hand, a concealable cup with a concave bottom according to the invention and stabilizing belts before being attached to the cup.

Fig. 11 shows the opening cup of Fig. 10 provided with stabilizing belts in partial cut so as to show the concave bottom of the cup.

Fig. 12 shows the cup of Fig. 11 in a collapsed condition, the stabilizing belt of which is shown in partial section so as to show the triangular bottom of the cup.

Fig. 13 shows a foldable cup according to the invention in a collapsed state as well as stabilizing belts before attaching them to a folded cup.

Fig. 14 shows an open cup of Fig. 13 with stabilizing belts attached, one of which is cut to show the concave bottom of the cup.

Examples of carrying out the invention

The cup according to the present invention is made of an elongated rectangular sheet (Fig. 1) formed of a semi-rigid material, the central part of which is provided with a knurl forming the shape of a diamond 1, the angles at its opposing peaks 2 located near the sides of the sheet 2 being sharp and preferably situated on the center line 4 of the sheet. The shape of the diamond i defines the concave bottom surface 1 of the future cup (Fig. 4) in an unfolded state. A second set of grooves 6 in the shape of a square 6 is attached to this first diamond 1, having two opposing vertices 7 at the points of the 2 nd diamonds located on the center line 4. This square 6 is the day of the future cup (FIG. 5) when this is folded. Two longitudinal grooves 8 (Fig. 1), parallel to the longer sides of said sheet, and passing the peaks of the 2nd and 7th diamonds 1 and 2, respectively. squares 6, define an area where the side edges of the 9th cup are interconnected. The central folding groove 10 (FIG. 1), parallel to the longer sheet sides 1, then passes through the remaining squares 11 and 12 of the square and the diamonds 1 to form the fold lines of the bottom 5.

To form the cup (Fig. 4), the sheet (Fig. 1) gradually bends along the central fold groove 10 (Fig. 2) such that the outer portion 13 of the future cup forms a cavity. The bottom of the future cup, which initially has the shape of a diamond 1 (Fig. 1), is formed into a wedge formed by two isosceles triangles 14 and 15 having a common base 16 and the formation of the bottom bottom 5 is formed. At the same time, pressure is exerted on the regions 17 and 18 located on both sides of the bottom 5 until their curvature is reversed by changing the bending direction along the central fold line 10 and a convex shape formed by two wedges 21 and 22 having a center edge 19 or 19 is obtained. . 20, which then forms the side walls of the cup (Fig. 4). As this movement continues, it creates a concave bottom

5. a cavity, while the edges 23 and 24 of the convex wedge 21 and 22 located on both sides of the concave bottom 5 and forming the regions 9 (FIG. 4) in which the sidewalls are connected to each other and at the end thereof the movement then starts to overlap in the lateral bend area 8. Then, the side walls can be joined together to form a cup with a diamond-shaped upper mouth.

The cup edge region 25 (Fig. 6), intended for drinking, is located in the region of the central folding groove 10 or intersects the edge 25 of said central folding groove 10. Of course, the cup (Fig. 6) is held close to the ends 12 of the common base 16 (Fig. 3) of both triangles 14 and 15, forming a concave wedge-shaped bottom resisting very finger pressure, since it does not contain any folds that could cause a start warping cup.

The pressure exerted on the groove 8 in the regions 9 (Fig. 4) where the sidewalls 21 and 22 are joined continues the concave bottom 5 to form a cavity. The region 26, located between the diamond 1 (Fig. 1), representing the bottom 5, and the square 6, is also gradually deformed. The central fold groove 10 (FIG. 4) in this region 26 deflects and the surface gradually becomes two right-angled isosceles triangles 27 and 28 as opposed to the opposing sides 21 and 22, resulting from the square 6 which are folded on top of each other (Fig. 1). These triangles connected with their diagonal, which are common to the base 16 (Fig. 2) of triangles 14 and 15, forming a concave bottom 5 (Fig. 5), are stacked. The cup (Fig. 5) is then opened, wherein the regions 9, where the opposing sides 21 and 22 are connected to each other, are situated in the central region of the folded cup, while the fold grooves 19 and 20 now form side edges of the folded cup. To facilitate this operation, it is possible to form a knurl 29 (Fig. 1), formed by lines that are parallel to each other and perpendicular to the central fold line 10.

To open the cup (Fig. 6), it is only necessary to apply pressure to the side edges 19 and 20 of the folded cup (Fig.5) and to change the direction of movement when the concave bottom 5 (Fig.10) changes to the original shape described above ( 4), which is formed by said two triangles 14 and 15 (FIG. 3) having a common side 16, which is a diagonal of the original diamond 1 (FIG. 1). When this position is reached, the wedge formed by the concave bottom 5 (Fig. 6) becomes sufficiently strong and the cup is then in an open state.

The original rectangular sheet may be enlarged by the flap 30 (Fig. 7) described in FR-A-2,614, 873, which has a fold line 31 on its base, allowing the flaps 30 to bend to ensure stability of the cup itself (Figs. .9). When the cup is completely folded, each flap 30 is folded around its own axis of symmetry, which is also an extension of the side edges 19 and 20 of the cup. The cup (Fig. 8) is opened as described above, the flaps 30 then forming two wedges whose bends 32 are extensions of the side edges 19 and 20.

When exerting pressure on the edges 32 in the knurling region 31 located in the base of the flaps 30, the wedge formed by these flaps 30 is flattened. The flaps 30 can then be rotated, the direction of bending being reversed to form a further wedge corresponding to the shape of the sidewalls 21 and 22 (FIG. 9) of the cup and thereby forming fixed support points 33, which act in combination with the dots 34 located at the end of the regions 9 where the sides 21 and 22 are connected to each other and which are close to the apexes 2 of the triangles forming the concave bottom 5 of the cup.

The stability of the cup can be improved by a solution that is both more economical in terms of material consumption and more user-friendly.

This solution consists in attaching a thin semi-rigid strip 36 to the side wall 35 of the cup (FIG. 10 and FIG. 11) in its unfolded state, one side 37 of which is in contact with the surface on which the open cup rests, thereby forming a support polygon. This belt 36, made of one or more parts, surrounds the entire or only part of the base of the cup.

In a cup made of a semi-rigid sheet folded in two halves with a concave bottom 38 (Fig. 13 and Fig. 14), which is provided with knurling and welded seams in regions 39 where the folded sidewalls 44 are joined to each other, merely need to add a rectangular semi-rigid thin strip 40, one side 41 of which lies on the fold 42 of the bottom 38 of the open cup. This strip 40 is attached at least at its ends 43 to regions 39 where the sides 44 of the cup are connected to each other, possibly to a portion

45, overlapping the cup sidewall 44 when it is formed. The belt 36 (Fig. 10) or the belt 46 (Fig. 13) comprises, if necessary, a knurling 46, corresponding to the knurling 47 on the side wall 35 or 44, whose shapes correspond to the opening of the cup. The width 49 or 50 of this strip is preferably equal to or greater than the depth of the cavity formed by the concave bottom 3.8 or 51.

In a pull-out cup with a preformed bottom (Fig. 10, Fig. 11, Fig. 12), the semi-rigid thin strip 36 is placed on both sides of the base of the cup, preferably in an unfolded position such that the bottom edge 37 of the strips 36 forms a supporting polygon itself on each other, or in conjunction with the points 52 of the concave bottom 51. Each of the strips 36 is attached at least at its ends 54, which overlap the regions 55 in which the opposite side walls 35 of the cup are connected to each other. When the cup is folded (Fig. 12), the side bands 36 overlap the cup triangular base 53. These side straps can be fixed by welding or gluing.

At the top of the cup (Figures 10 and 14), a small flap 56 of a few centimeters width can be formed to widen the edge of the cup. This flap 56, when folded, makes it possible to form a flange suitable for drinking. This flap 56 may be further extended by a ring 57 (FIG. 12) to close the folded cup which is separated from the flap 56 by a cross-section.

The ring 57 can be closed by gluing, welding, closing, or any other suitable means. When using the cup, it is then necessary to pre-remove the ring 57, which forms a closure ensuring the purity of the contents.

The cup according to the present invention can be easily formed from a compact sheet of cardboard which is coated on its inner side with a thin layer of plastic to ensure the cardboard is impermeable and also to secure the edges 9 or 55 by means of a weld.

Claims (7)

PATENT CLAIMS An openable cup of semi-rigid sheet, in the central part of which a bottom (5) is formed by scoring, which in the folded state is formed by two walls (21, 22), which are fastened together by their edges (39, 55) and further by a concave bottom wherein said cup is simply formed by pressure on its side edges (19, 20), the walls of said cup being provided with stabilizing flaps (30) whose ends form support points for stabilizing the cup base, characterized in that: the preformed bottom (5) is a wedge delimited by the surfaces of two isosceles triangles (14, 15) having a common base (16) and whose peaks (2) form an acute angle and coincide with the peaks (7) of two adjacent rectangular isosceles triangles (27, 28) forming a square (6), the two portions of which are disposed on each side of the base (16) and are superimposed on the cup in the collapsed state; the cup base is stabilized by attaching at least one side strip (36, 40), the lower edge (37, 41) of which, in cooperation with the points (52) of the concave bottom, forms all or part of the supporting polygon of said cup; the flap (56) extends the cup walls (35) and is bent down to form the top edge of the cup. Cup according to claim 1, characterized in that the strength of the wedge forming the bottom (5) is ensured by a single bending line (16). A cup according to claim 1, characterized in that. in the region (26) of the bottom (5), to facilitate the transition of the cup from the folded state to the unfolded state, a knurling (29) is provided which is parallel to the edges of the cup. Cup according to claim 1, characterized in that said side bands (36, 40) are attached to the cup by attaching their edges (43, 54) to areas (55, 39) in which the sidewalls (35, 44) are connected to each other. ) cups. The cup of claim 1, wherein the flap (56) terminates in a contact strip (57) separated from said flap by a cut (58) that allows the cup to be closed by shaping the strip and which ensures the integrity of the interior of said cup. 6. Cup according to any one of the preceding claims, characterized in that the method for producing the cup comprises shaping the cup and its bottom in the unfolded state before its final opening. 7. Cup according to any one of the preceding claims, characterized in that it is made of a compact sheet of cardboard covered on the inside with a thin layer of plastic.