Packaging made of sheet metal material with tear-off foil lid and material set, and method for producing same

Abstract

A package made of sheet material with a tear-off foil cover includes a seamless frame (1) produced by deep drawing, which forms a package wall (6) enclosing the interior space of the package. At a first end (T), the frame (1) forms an extraction opening surrounded by a sealing flange (2), which is closed by a tear-off foil cover (3) sealed onto the sealing flange (2). At its other, second end (B), the frame (1) is connected by flanging to a sheet metal cover (4) which forms the package bottom (7). The package can be produced inexpensively with low energy and material consumption from both steel sheet material and aluminum sheet material, has no weld seams, can be tested for leaks before filling, and enables high filling speeds.

What is claimed is: 
     
         1 . A package made of sheet material with a tear-off foil cover, comprising:
 a seamless frame produced by deep drawing, which forms a package wall enclosing the interior space of the package and which has a first end (T) and a second end (B),   wherein the frame forms at its first end (T) an extraction opening surrounded by a sealing flange, which is closed by a tear-off foil cover glued or sealed onto the sealing flange,   and wherein the frame is connected at its second end (B) by flanging to a sheet metal cover which forms the package bottom.   
     
     
         2 . The package according to  claim 1 , wherein the sealing flange extends radially outward from the package wall formed by the frame. 
     
     
         3 . The package according to  claim 1 , wherein the sealing flange comprises a circumferential edge outwardly delimiting its sealing surface. 
     
     
         4 . The package according to  claim 3 , wherein the sealing flange and the package bottom are configured in such a way that the package bottom of a first package can be arranged within the edge, which outwardly delimits the sealing surface, of an identical second package. 
     
     
         5 . The package according to  claim 1 , wherein the package wall defines a substantially cylindrical package interior space. 
     
     
         6 . The package according to  claim 1 , wherein the package wall and the package bottom are made of an identical sheet material, in particular of identical coated steel sheet material or aluminum sheet material. 
     
     
         7 . The package according to  claim 1 , wherein the package bottom is made of a deep-drawn sheet material. 
     
     
         8 . A kit of materials for forming packages according to  claim 1 , comprising
 a) seamless frames produced by deep drawing to form the package walls of the packages, which each form an extraction opening surrounded by a sealing flange at a first end (T) and a filling opening at a second end (B),   and   b) sheet metal covers with which the filling openings of the frames can be closed by producing a flanged connection between the respective frame and the respective sheet metal cover.   
     
     
         9 . The kit of materials according to  claim 8 , wherein the sheet metal covers are made of a deep-drawn sheet metal material which is identical to the material of the frames. 
     
     
         10 . The kit of materials according to  claim 9 , wherein the extraction openings of the frames are each closed by a tear-off foil cover glued or sealed onto the sealing flange. 
     
     
         11 . A method for manufacturing the kit of materials according to  claim 8  comprising the steps of:
 a) manufacturing of identical deep-drawn cup-like containers each with a cup opening, a closed cup bottom, a circumferential closed cup wall extending between the cup bottom and the cup opening, and a sealing flange surrounding the cup opening; 
 b) separating the cup bottoms from the containers in such a way that first container parts are present which essentially consist of the separated cup bottoms, and second container parts are present which are essentially formed from the respective cup wall and the sealing flange surrounding the respective cup opening; 
 c) formation of the sheet metal covers from the first container parts and formation of the frames from the second container parts. 
 
     
     
         12 . The method according to  claim 11 , wherein the separation of the cup bottoms with a part of the cup wall from the respective container takes place in such a way that the co-separated part of the cup wall forms a collar of uniform height around the cup bottom. 
     
     
         13 . The method according to  claim 11 , comprising the step of:
 sealing or glueing tear-off foil covers onto the sealing flanges of the second container parts each in such a way that the cup opening is completely closed by the tear-off foil cover.   
     
     
         14 . The method according to  claim 13 , wherein a leak test of the second container part with the tear-off foil cover is carried out each after the sealing or glueing. 
     
     
         15 . The method according to  claim 11 , further comprising the step of:
 re-shaping the collars of the first container parts or the collars of the first container parts and the ends (B) of the cup walls of the second container parts forming the filling opening, each in such a way that these regions can be re-shaped in a further step into a flanged connection between one of the first container parts and one of the second container parts, for closing the filling opening of the second container part with the first container part.   
     
     
         16 . The method according to  claim 15 , wherein a putative re-shaping of the end of the cup wall of the second container part forming the filling opening takes place each before the tear-off foil cover is sealed or glued onto the sealing flange. 
     
     
         17 . The method according to  claim 11 , wherein the sealing flange of the cup-like container is each formed in such a way that it extends radially outward from the cup opening. 
     
     
         18 . The method according to  claim 17 , wherein the sealing flange of the cup-like container is each formed in such a way that it has a circumferential edge outwardly delimiting the sealing surface. 
     
     
         19 . The method according to  claim 11 , wherein the deep-drawn cup-like containers each have a substantially cylindrical cup interior space. 
     
     
         20 . The method according to  claim 11 , wherein the deep-drawn cup-like containers are each produced from a sheet metal blank which is at the manufacturing site of the cup-like container punched out of an in particular coated sheet metal web, in particular of steel sheet material or aluminum sheet material. 
     
     
         21 . The method according to  claim 11 , wherein the tear-off foil covers are each punched out of a foil web at the manufacturing location of the cup-like container. 
     
     
         22 . The method for manufacturing filled packages according to  claim 1 , in particular food packages, comprising the steps:
 a) manufacturing of identical deep-drawn cup-like containers with a cup opening, a closed cup bottom, a circumferential closed cup wall extending between the cup bottom and the cup opening, and a sealing flange surrounding the cup opening;   b) separating the cup bottoms with a part of the cup wall from the respective container each in such a way that a first container part for forming a sheet metal cover is present, which is formed from the separated cup bottom with the co-separated part of the cup wall, wherein the co-separated part of the cup wall forms a collar of uniform height around the cup bottom, and that a second container part for forming a frame is present, which is formed from the remaining cup wall and the sealing flange surrounding the cup opening;   c) sealing or glueing tear-off foil covers onto the sealing flanges of the second container parts each in such a way that the cup opening is completely closed by the tear-off foil cover;   d) re-shaping the collars of the first container parts or the collars of the first container parts and the ends (B) forming the filling opening of the cup walls of the second container parts each in such a way that, in a further step, these regions can each be re-shaped into a flanged connection between one of the first container parts and one of the second container parts, such that the first container part closes the filling opening of the second container part;   e) filling the second container parts with a filling material each after the tear-off foil cover has been sealed or glued via the filling opening;   f) closing the filling openings of the filled second container parts each with one of the first container parts by adjoining the first container part to the second container part and producing the flanged connection between the first and the second container part.   
     
     
         23 . The method according to  claim 22 , wherein the filling opening of the respective filled second container part is each closed with a first container part which has previously been separated from this second container part. 
     
     
         24 . The method according to  claim 22 , wherein the filling opening of the respective filled second container part is each closed with a first container part which has been separated from another of the second container parts. 
     
     
         25 . The method according to  claim 22 , wherein the re-shaping of the collar of the respective first container part which is used for closing the filling opening of the respective second container part takes place in the period of time in which the putative re-shaping of the end (B) of the cup wall of the second container part forming the filling opening, the sealing or glueing of the tear-off foil cover onto the sealing flange of the second container part and/or the filling of the second container part takes place. 
     
     
         26 . The method according to  claim 22 , wherein a putative re-shaping of the end (B) of the cup wall of the respective second container part forming the filling opening takes place before the tear-off foil cover is sealed or glued onto the sealing flange. 
     
     
         27 . The method according to  claim 22 , wherein the sealing flange of the cup-like container is each formed in such a way that it extends radially outward from the cup opening. 
     
     
         28 . The method according to  claim 27 , wherein the sealing flange of the cup-like container is each formed in such a way that it has a circumferential edge outwardly delimiting the sealing surface. 
     
     
         29 . The method according to  claim 28 , wherein the sealing flange and the flanged connection between the first container part and the second container part are each formed in such a way that the bottom of a first finished package can be arranged within the edge outwardly delimiting the sealing surface of a second finished package. 
     
     
         30 . The method of  claim 22 , wherein the deep-drawn cup-like containers are each formed in such a way that they have a substantially cylindrical cup interior space. 
     
     
         31 . The method according to  claim 22 , wherein the deep-drawn cup-like containers are each produced from a sheet metal blank which is punched out at the manufacturing site of the package from an in particular coated metal sheet material web, in particular of coated steel sheet material or aluminum sheet material. 
     
     
         32 . The method according to  claim 22 , wherein the tear-off foil covers are each punched out of a foil web at the manufacturing site of the packages. 
     
     
         33 . The method according to  claim 22 , wherein a leak test of the respective second container part with the tear-off foil cover is carried out each before the second container parts are filled.