Packaging container

Abstract

In order to provide a packaging container having a beaker-shaped bottom part intended to hold package goods and provided with an upper edge defining the beaker opening, and having a lid for closing said beaker opening, preferably hermetically, said lid being preferably in the form of a ring-pull lid of metal, which packaging container is, in particular, a food-grade container of less weight than conventional containers but of the same quality with regard to the protection of the packaged goods, it is proposed that the bottom part is a deep-drawn plastics beaker which has an upper edge that is shaped during deep drawing and has a calibrated wall thickness and which forms a substantially no-play receiver for the lid.

1 . A packaging container having a beaker-shaped bottom part intended to hold packag goods and having an upper edge defining a beaker opening and a lid which closes said beaker opening, characterized in that said bottom part is a deep-drawn plastics beaker having a top edge which is formed by deep drawing so as to have a calibrated wall thickness and which forms a substantially no-play receiver for the lid.  
     
     
         2 . A packaging container as defined in  claim 1 , characterized in that the beaker-shaped bottom part is of plastics material and is capable of being stacked.  
     
     
         3 . A packaging container as defined in  claim 1  or  claim 2 , characterized in that the plastics beaker-shaped bottom part is made of a sterilizable plastics material.  
     
     
         4 . A packaging container as defined in any one of  claims 1  to  3 , characterized in that calibration of the wall thickness of the upper edge of the beaker-shaped bottom part guarantees a tolerance of ±0.03 mm or less, based on a thickness of the edge of 0.4 mm.  
     
     
         5 . A packaging container as defined in any one of  claims 1  to  4 , characterized in that the beaker-shaped bottom part is made of a translucent or transparent plastics material.  
     
     
         6 . A process for the production of a packaging container as defined in any one of  claims 1  to  5 , characterized in that a deep-drawable plastics sheet is deep-drawn by means of a deep-drawing die which comprises a top ram and a depresser exhibiting a circumferential shoulder which presses said deep-drawing sheet against a seat and fixes it in position during the deep-drawing operation, and the deep-drawing die further comprises a circumferential ring-shaped projection disposed radially inwardly of said shoulder and extending downwardly, which is moved beyond the shoulder of the depresser to project into the beaker space of the deep-drawing die, the wall thickness of the edge of the beak r-shaped bottom part being calibrated thereby to a specific thickness, whilst the beaker space of the bottom part is formed by the top ram in a manner known per se.  
     
     
         7 . A process as defined in  claim 6 , characterized in that said d press r and said ring-shaped, downwardly projecting projection are moved to their respective working positions for calibrating the thickness of the edge of said beaker-shaped bottom part, after which the top ram shapes the deep-drawing sheet to form said beaker-shaped bottom part.  
     
     
         8 . A process as defined in  claim 7 , characterized in that said depresser and said ring-shaped, downwardly projecting projection are moved together and simultaneously to their respective working positions.  
     
     
         9 . A process as defined in  claim 8 , characterized in that a depresser is used which forms a single unit with said downwardly projecting molded-on annular projection serving to determine the thickness of the edge of the beaker-shaped bottom part.  
     
     
         10 . A process as defined in any one of  claims 6  to  9 , characterized in that the ring-shaped, downwardly projecting projection provided for calibrating purposes is cooled.