OA18239A - Thermoformed container. - Google Patents

Abstract

The container has a hollow body (1) with a flat base (11), a sidewall with an upper end delimitating the mouth (12) and extending towards the outside of the container in form of a perimetric flange (13); the hollow body (1) having an upper portion (14) with a constant cross section, bearing an external decoration web (2) and a lower portion 10 (15) with decreasing cross section. The sidewall of the container has wedge like recesses (16) arranged in correspondence with the upper end of the lower portion (15) and distributed around the body of the container; and groups of reinforcement embossments (17) which are hollow and elongated and protrude from the body of the container, being vertically oriented. The reinforcement embossments (17) start from 15 the upper portion (14) of the container and finish in an intermediate area of the lower portion (15).

Description

Object ofthe invention.

The object of the invention is a thermoformed container with a hollow body which has a fiat base, a sidewall extending from the periphery of the base, having said sidewall an upper end delimitating the mouth of the container and extending towards the exterior of the container in form of a perimetric flange; having the hollow body of the container an upper portion with a constant cross section, bearing an external décoration web, and a lower portion comprised between the upper portion and the 10 base of the container having a tapering structure in descending direction.

Field of application ofthe invention

The thermoformed container of the invention is preferably, although not exclusively, applicable to the packing of food products.

State of the art

Currently, different types of plastic thermoformed containers are known in the market aimed at the food packing field, for packing various food products, such as yogurt or dairy dessert products.

A previous embodiment of this type of containers, described in document CA 2830032

A1 has a hollow body with a fiat base, its periphery extending in a sidewall which has an upper end delimitating the mouth of the container and extending towards the exterior of the container in form a perimetric flange. Said container, the same as other 25 existing in the market, has in its hollow body an upper portion with constant cross section bearing an external décoration web and a lower portion with tapering cross section in descending direction, comprised between the mentioned upper portion and the base of the container.

In this type of containers, it is known the lower portion to hâve a curved profile to facilitate the extraction of most of the product contained within the container by means of a small spoon.

These type of thermoformed containers, made out from a sheet of plastic material, 35 hâve a lower strength in the transition area between the upper portion and the lower portion of the container, being necessary to oversize the thickness of the plastic sheet in order that said transition area has the sufficient strength to permit the nesting and transport of the containers in a safe form.

Said oversizing détermines the rest of the parts of the container to hâve a larger thickness than necessary, deriving therefrom an increase of the plastic material necessary for the manufacture of the container.

The présent inventor does not know the existence of prior embodiments permitting to solve in a satisfactory way the above mentioned drawback.

Description ofthe invention

The thermoformed object of this invention, of the type described in the precharacterizing part of the main claim, has technical characteristics aimed at solving the above mentioned drawback and to provide the body of the container with a higher strength to compression in the weakest area, which is the transition area between the upper portion with an uniform cross section and the lower portion with a tapering cross section, making the use of an oversized plastic sheet for the manufacture of the container unnecessary.

Another objective of the invention is to obtain the réduction of the quantity of plastic material for the manufacture of the container, for needing a lesser thickness of the material in the less weak areas of the same.

To that end and according to the invention, the sidewall of the container has wedge like recesses arranged in correspondence with the upper end of the lower portion of the container and distributed around the body of the container; and groups of reinforcement hollow embossements which protrude from the body of the container and are vertically oriented.

The mentioned reinforcement embossments start from the upper portion of the container and end in an intermediate area of the lower portion of the container, being the upper ends of said reinforcements embossments arranged under the external décoration web.

The wedge like recesses, in number of three or more, arranged at the same distance to one another, hâve the object to reinforce the weakest part of the container, which is precisely the lower end of the upper portion, that is, the place in which the décoration web ends up, beginning the lower portion ofthe container.

These wedge like recesses hâve an effect similar to load beams in the weaker part of 5 the container, transmitting a part of the loads to a lower area of the container, which has a smaller section and therefore, is stronger.

The above mentioned reinforcement embossments, hâve as well the object of reinforcing the container as they start from the upper portion of the container, so that 10 the décoration web overlaps them extending said embossments along the lower portion up to an area with a higher résistance.

This features bring about improvements in respect to the current containers as they improve the résistance to compression of the container (manufacture, nesting for 15 transport and storage, etc) and bring savings of the plastic material for its manufacture of about 10%.

Description ofthe drawings

To complété the description and with the aim to facilitate the understanding of the 20 features of the invention a set of drawings is annexed to this description in which in an illustrative, but not limiting way, the follow has been shown:

- Figure 1 shows a diagrammatic front view of a thermoformed container, according to the invention.

Preferred embodiment ofthe invention

The thermoformed container shown in Figure 1 comprises a hollow body (1) with a fiat base (11) a latéral wall delimitating in the end opposite to the base the mouth (12) of the container. The container shows a perimetric flange (13) around the mouth (12).

The hollow body (1) has an upper portion (14) with a constant cross section, for example cylindrical cross section, bearing an external décoration web (2) and a lower portion (15) with tapering cross section in descending direction, comprised between the upper portion (14) and the base (11).

In this case, the said lower portion (15) has a curved convex profile in its external face.

In the example which has been shown the latéral wall of the container has wedge like recesses (16) arranged in correspondence with the upper end ofthe lower portion (15) and distributed around the body ofthe container.

Said latéral wall has as well groups of reinforcement embossments (17) which are hollow, elongated, protruding from the hollow body (1) ofthe container.

The above mentioned reinforcement embossments (17) are directed vertically starting from the upper portion (14) of the container and extending to an intermediate area of the lower portion (15), increasing the résistance to the compression ofthe container.

It has been foreseen that the container has three or more wedge like recesses (16) and a similar number of groups of reinforcement embossments (17) regularly distributed around the container.

As can be observed in the annexed figure, the external décoration web (2) covers the part of the reinforcement embossments (17) defined in the upper portion (14) of the container.

After having sufficiently described the nature of the invention, as well as a preferred embodiment of the same, it is stated to ail effects that the materials, shape, size and arrangement of the described éléments can be modified, whenever the changes do not mean the alteration of the essential characteristics of the invention, which is claimed as follows.

Claims (4)

1. Thermoformed container; comprising a hollow body (1) having a fiat base (11), extending around its periphery in a sidewall with an upper end delimitating the mouth (12) of the container which extends towards the exterior of the container in form of a perimetric flange (13); the hollow body (1) having an upper portion (14) with a constant cross section bearing an external décoration web (2); and a lower portion (15) comprised between the upper portion (14) and the base (11), having a tapering cross section in descending direction; characterized in that the sidewall of the container, has wedge like recesses (16) arranged in correspondence with the upper end of the lower portion (15) and arranged around the body of the container and groups of reinforcement embossments (17) which are hollow and elongated, protruding from the body of the container being oriented vertically; starting said reinforcement embossments (17) from the upper portion (14) of the container and ending in an intermediate area ofthe lower portion (15), being the upperends of said reinforcement embossments (17) located under the external décoration web (2).

2. Container, according to claim 1, characterized in that the wedge like recesses (16) hâve a depth which decreases towards the lower area.

3. Container, according to any of the previous claims, characterized for comprising three or more wedge like recesses (16) and a similar number of group of reinforcement embossments (17) regularly distributed on the periphery ofthe container.

4. Container, according to any of the previous claims, characterized in that the lower portion (15) has a curved convex profile in its external face.