Multi-color printed and embossed lid for cream jars and method for producing such lids

Abstract

A method for producing a printed and embossed deep-drawn lid of aluminum that is circular in plan view. The method comprises: (a) printing an aluminum plate with at least one of a varnish and a paint; (b) cutting the aluminum plate; (c) deep drawing; (d) embossing; and (e) optionally, edge rolling. Steps (b), (c), (d) and optionally (e) are carried out with a single tool. A lid obtainable by this method is also disclosed.

1 .- 11 . (canceled) 
   
   
       12 . A method for producing a printed and embossed deep-drawn lid of aluminum that is circular in plan view, wherein the method comprises:
 (a) printing an aluminum plate with at least one of a varnish and a paint;   (b) cutting the aluminum plate;   (c) deep drawing;   (d) embossing; and   (e) optionally, edge rolling,   (b), (c), (d) and optionally (e) being carried out with a single tool.   
   
   
       13 . The method of  claim 12 , wherein the method comprises, based on a position of a driving crankshaft:
 (b) cutting the aluminum plate 135° to 145° after an upper dead-center position;   (c) deep drawing 140° to 170° after the upper dead-center position;   (d) embossing 170° to 180° after the upper dead-center position;   (e) optionally, edge rolling 180° to 200° after the upper dead-center position; and   (f) optionally, blowing out 330° to 360° after the upper dead-center position.   
   
   
       14 . The method of  claim 12 , wherein a dimensional variation between a contour of an imprint and a contour of an embossing is no more than 0.3 mm. 
   
   
       15 . The method of  claim 12 , wherein the tool has an ejector which is arranged with respect to a prospective lid shape towards an open side of the lid at least with 50% of its area by from 0.4 mm to 0.9 mm. 
   
   
       16 . The method of  claim 12 , wherein (i) the tool comprises an upper die and a bottom die driven by a crankshaft, (ii) the bottom die comprises at least a core, a blank holder comprising an integrated rolling ring, and a die ring, (iii) the upper die comprises a male die and an ejector, (iv) the ejector has an embossing die in its central area, ventilation and mounting bores outside the embossing die and an annular clamping area near an edge thereof, edges of which have a spacing of at least 8 mm and which is free from bore holes and mounting holes, (iv) the upper die is not freely rotatable, (v) the bottom die also comprises an embossing die, and (vi) the embossing dies of the upper and lower dies are aligned and are recessed in the ejector and the core. 
   
   
       17 . The method of  claim 16 , wherein the embossing die comprises on the core two mounting bores and two ventilation/ejector bores. 
   
   
       18 . The method of  claim 16 , wherein the tool has gap widths between the bottom die and the upper die and between the male die and the blank holder and core of from 20 μm to 40 μm. 
   
   
       19 . The method of  claim 12 , wherein the tool has a throughput of at least 150 pieces/min. 
   
   
       20 . The method of  claim 12 , wherein the tool has a throughput of at least 190 pieces/min. 
   
   
       21 . The method of  claim 12 , wherein the aluminum plate comprises an AlMg alloy comprising 2.5% of Mg. 
   
   
       22 . A lid for a jar, wherein the lid comprises aluminum and is painted, printed, deep-drawn and embossed, circular in plan view, and substantially has a shape of a cylinder which is open on one side, and wherein an imprint on a substantially flat surface has at least one contour that substantially coincides with a contour of an embossing. 
   
   
       23 . The lid of  claim 22 , wherein a dimensional variation between the contour of the imprint and the contour of the embossing is no more than 0.3 mm. 
   
   
       24 . The lid of  claim 22 , wherein the lid is obtainable by a method which comprises:
 (a) coating an aluminum plate with at least one of a varnish and a paint;   (b) cutting the aluminum plate;   (c) deep drawing;   (d) embossing;   (e) optionally, edge rolling,   (b), (c), (d) and optionally (e) being carried out with a single tool.   
   
   
       25 . The lid of  claim 24 , wherein the method comprises, based on a position of a driving crankshaft:
 (b) cutting the aluminum plate 135° to 145° after an upper dead-center position;   (c) deep drawing 140° to 170° after the upper dead-center position;   (d) embossing 170° to 180° after the upper dead-center position;   (e) optionally, edge rolling 180° to 200° after the upper dead-center position; and   (f) optionally, blowing out 330° to 360° after the upper dead-center position.   
   
   
       26 . A jar containing a cosmetic preparation, wherein the jar comprises the lid of  claim 22 . 
   
   
       27 . A tool for making a lid for a jar which comprises aluminum and is painted, printed, deep-drawn and embossed, circular in plan view, and substantially has a shape of a cylinder which is open on one side, wherein the tool comprises an upper die and a bottom die driven by a crankshaft, the bottom die comprises at least a core, a blank holder comprising an integrated rolling ring, and a die ring, the upper die comprises a male die and an ejector, the ejector has an embossing die in its central area, ventilation and mounting bores outside the embossing die and an annular clamping area near an edge thereof, edges of which have a spacing of at least 8 mm and which is free from bore holes and mounting holes, the upper die is not freely rotatable, the bottom die also comprises an embossing die, and the embossing dies of the upper and lower dies are aligned and are recessed in the ejector and the core. 
   
   
       28 . The tool of  claim 27 , wherein the ejector is arranged with respect to a prospective lid shape towards an open side of the lid at least with 50% of its area by from 0.4 mm to 0.9 mm. 
   
   
       29 . The tool of  claim 27 , wherein the embossing die comprises on the core two mounting bores and two ventilation/ejector bores. 
   
   
       30 . The tool of  claim 27 , wherein the tool has gap widths between the bottom die and the upper die and between the male die and the blank holder and core of from 20 μm to 40 μm. 
   
   
       31 . The tool of  claim 27 , wherein the tool has a throughput of at least 150 pieces/min.