DE1261051B - Thin-walled, top-open and stackable containers, such as drinking cups, cup inserts, etc. like - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B65d

German class: 8Ic-Il

Number: 1261 051

File number:

Filing date: April 9, 1966

Open date: February 8, 1968

The invention relates to thin-walled, open-topped and stackable containers, such as drinking cups, Cup inserts and the like, which are in particular deep-drawn from thermoplastic material. They are such Container with a stacking attachment in the form of a projection extending to the inside of the container is known (German Auslegeschrift 1178 352), in which the side walls of this stacking attachment at least partially extend conically from the bottom of the container to the inside of the container. These known stacking attachments are with a substantially circular cross-section or as at the bottom edge extending up in the lower portion of the side wall extending nose known.

In this respect, these known stacking attachments have an adverse effect on the manufacturing process of the container when the container bottom that has just been formed must still be sufficiently flexible, in order to be able to safely remove the container with the molded-in stacking attachment. With the known Stacking attachments can also be provided with only a slight conicity with which the attachment is the inside of the container expanded so that a safe demolding of the container is possible. In all of those Cases where these preconditions could not be complied with were previously only known Ability to use molds with moving, retractable parts, but this reduces the Production for such containers as a mass-produced item would be too expensive.

In contrast, the object of the invention is to provide a container with a stacking attachment in the bottom to create the mold itself without the need for the known preconditions can pull, so offers no difficulties in demolding. At the same time, however, the stacking attachment should offer full security when stacking the containers on top of each other.

The object set is achieved according to the invention in that the conically widening wall parts are designed with end regions of tapered conicity. In this way it is achieved that the high stack security ensuring, conically widening wall parts are formed with their full effectiveness on the stack top, but receive sufficient elastic resilience at their end regions to allow them under moderate tension with full security under elastic bending from the corresponding molds to be able to pull. By eliminating the closed conical thin-walled, open top and stackable ones that exist in the known stacking attachments
Containers such as drinking cups, cup inserts and the like.

Applicant:

Alfons W. Thiel, 6500 Mainz, Kaiserstr. 63

Named as inventor:
Alfons W. Thiel, 6500 Mainz

see annular surface or closed annular Shoulder, the need to temporarily close these stacking elements when demolding the container is eliminated stretch or squeeze. Instead, the stack elements provided according to the invention are used can only be bent elastically at times. This reduces the risk of permanent, i.e. H. a plastic one

ao deformation is reduced, and the force required for demolding is reduced. According to the Invention equipped in their edge areas with elastic resilience, conically widening Wall parts only open under tension, while they open under pressure when stacking be more closed. In this way, a stack of collapsed containers is maintained of the invention an additional elastic compliance in the axial direction to a degree, as in the Practice is desired. Also have the well-known containers provided with a stacking attachment in the bottom an axial elastic compliance in the stack. This elastic resilience is there by the the ring-shaped bottom part surrounding the stacking top, which acts in the manner of a disc spring. This results in axial compliance to such a considerable extent that the container in one Stack can be jammed into one another. In the context of the invention, however, the container bottom be stiffened substantially, so that the axial compliance to a desired Dimension is adjustable.

The conically widening wall parts double the desired elastic resilience End regions of tapered conicity that impart respect can be designed in various forms be. For example, it is possible that the conically widening wall parts at their end tapering conicity merge into a substantially axially extending wall part. Another possibility is that the stacking attachment at the end of the conically widening

809 507/411

ternden wall parts is flattened to run out of the conicity.

In a particularly expedient embodiment of the invention, the stacking attachment is star-shaped formed and has the conically widening wall parts on its substantially radially extending Rays on, with these conically widening wall parts at their star inner end area merge into substantially axially extending wall parts and at their star outer End area are flattened by inclined beam end walls in the floor plane.

With such a star-shaped stacking attachment, the conicity of the widening wall parts can be reduced Keep relatively low if the rays of the star-shaped stack top with uneven Angular division are arranged. With the taper kept so low, the one required for demolding is The tensile force is kept particularly small, and in this way the axial elastic resilience can also be reduced modify a stack of containers.

An embodiment of the invention is explained in more detail below with reference to the drawing. It shows

F i g. 1 a cup insert according to the invention viewed from above,

F i g. 2 two cup inserts stacked one inside the other according to FIG. 1 in section CD and

F i g. 3 shows a partial section AB according to FIG. 1 of two cup inserts stacked one inside the other.

In the embodiment shown, it is a matter of thermoformed, thin-walled cup inserts 1, which are intended to be inserted into an annular cup holder and to be snapped into this cup holder with a push-button-like edge area 2. These cup inserts 1 are removed from the cup holder after use and thrown away. According to this purpose, they are kept ready for the user in canteens or beverage dispensing machines in stacks. In order to hold the stacked cup inserts 1 with complete security against jamming in the desired stack spacing and to be able to remove them individually from the stack or dispense individually through the drinks machine, a star-shaped stacking attachment 4 is formed in the bottom 3, which extends upwards from the bottom surface in the form of a projection extends into the interior of the insert. In order to achieve the required stacking security, this star-shaped stacking attachment 4 is designed on its rays 5 with side walls 6 that widen conically from the insert base 3 upwards, ie after the insert interior. These side wall parts 6 are .on their end regions 1, 8 with a tapered conicity, in such a way that the star inner end region? the conically widening wall parts 6 merge into an essentially axially extending wall part 9, while they are flattened at their star-outer end region 8 by the beam end walls 10 running obliquely from the stacking top 4 into the bottom plane. The essentially axially extending wall parts 9 are the arched connecting walls between the individual beams 5.

This design of the conically widening side wall parts 6 of the rays 5 of the star-shaped Stacking attachment 4 with the end regions 7 and 8 tapered conicity, these are lateral Wall parts 6 in the transverse direction of the respective beam 5 are elastically deformable both outwards and inwards. The elastic deformability of these wall parts 6 towards the outside, which is indicated in FIG. 3 by the arrows 11 is indicated, it allows these wall parts 6 without difficulty when demolding over the corresponding Conical parts of the mold, for example on the bottom, of a negative mold. Here is the curved shape of the axially extending wall parts 9 is advantageous because it makes it particularly easier corresponding to the triangular part of the bottom wall 3 lying between two star rays 5 to squeeze. In the star-outer area 8, the conicity of the wall parts 6 runs out in that the wall parts is continuously flatter through the inclined star end wall 10 and thus after their star outer end no longer has to be deformed.

As from the arrows 12 and 13 of Fi g. 3 can be seen, if an axial pressure (see arrow 12) exerted on a stack of cup inserts 1 becomes a constriction, d. H. an enlargement of the conicity of the conical Wandtedle 6 implemented (see. Arrow 13). the given by the end regions 7 and 8 elastic deformability of the wall parts 6 in the direction of the arrows 11 and 13 thus shows that a stack of cup inserts 1 has an elastic resilience in the sense who receives arrows 12.

To improve the stacking properties, an uneven angular division of the star 4 is provided in the example shown. In the example shown, it is a five-pointed star, and the angles <x, γ and ε lying between the individual rays 5 are approximately 70 °, while the angular distances β and δ are approximately 75 °. This results in only a critical sector of about 5 ° over the entire angular circumference of 360 °, within which the five rays of the star 4 are almost exactly one above the other. The conically widening wall parts 6 can therefore be set up relatively steeply and can thus be expanded with relatively little tension in the direction of the arrows 11 during removal from the mold and pulled over the corresponding parts of the molding tool.

Claims (8)

Patent claims: 1. Thin-walled, open-topped and stackable containers, such as drinking cups, cup inserts and the like, in particular deep-drawn from thermoplastic material, with mounted in the ground Stacking attachment in the form of a projection extending towards the interior of the container, its Side walls at least partially extend conically from the container bottom towards the interior of the container, characterized in that that the conically widening wall parts (6) are designed with end regions (7, 8) of tapered conicity. 2. Container according to claim 1, characterized in that the conically widening Wall parts (6) at their end region (7) tapering conicity into a substantially axially extending wall part (9) pass. 3. Container according to claim 2, characterized in that that the substantially axially extending wall part (9) is curved. 4. Container according to claim 1, characterized in that the stacking attachment (4) at the end (8) the conically widening wall parts (6) is flattened to taper off the conicity. 5. Container according to one of claims 1 to 4, characterized in that the stacking attachment (4) is star-shaped and the conically widening wall parts (6) on its has substantially radially extending rays (5), these widening conically Wall parts (6) at their star-inner end region (7) in essentially axially extending Wall parts (9) pass over and at their star-outer end region (8) by beam end walls extending obliquely into the floor plane (10) are flattened. IO 6. Container according to claim 5, characterized in that the substantially axially extending Wall parts (9) the curved connecting walls between the rays (5) of the star-shaped Stacking attachment (4) are. 7. Container according to claim 5 or 6, characterized in that the rays (5) of the star-shaped Stacking attachment (4) are arranged with uneven angular distribution. 8. A container according to claim 7, characterized in that the angular distances (α, β, γ, d, ε) of the beams (5) vary by about 5 °. Considered publications:
German interpretative document No. 1178 352. 1 sheet of drawings 809 507/411 1.68 © Bundesdruckerei Berlin