Sealing cap having a push-button for emptying a capsule formed thereby

Abstract

The invention relates to a fillable sealing cap (1), which forms a capsule (18), which is open to the bottom and can be sealed by a sealing washer (3), in the interior thereof. A central push-button (2) for depressing the capsule lid (6), thereby deforming the capsule lid, is formed on the outside of the capsule lid (6). A central stamp (7) protruding axially downward is formed on the inside of the capsule (18) underneath the push-button (2). At least three spreading legs (8) protruding downward and outward at an acute angle to the sealing-rotation axis (21) are formed distributed about the stamp. The capsule lid (6) is corrugated about the stamp (7) in the radial direction, wherein said capsule lid (6) has a thinner wall thickness in the first, interior region (10) of the radius thereof than in the second, outer region (11). The lid wall is flexed in two phases in the event of pressure from above on the push-button (2). The stamp (7) presses on the sealing washer (3), initially tensioning the sealing washer and then opening sealing washer while the ends (26) of the spreading legs (8) slide outward and press the sealing washer (3) downward on the circumference thereof and then hold the sealing washing pivoted downward.

1 . A fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, having a push button ( 2 ) for triggering the emptying of a capsule ( 4 ) being formed under said push button ( 2 ) and being open at the bottom and sealable with a sealing washer ( 3 ), said capsule ( 4 ) having a circumferential capsule wall ( 5 ) and capsule lid ( 6 ), for receiving a substance which can be emptied into a container equipped with this sealing cap ( 1 ), wherein, on the outside of the capsule lid ( 6 ), a central push button ( 2 ) is formed for pressing down the capsule lid ( 6 ) while deforming it, characterised in that a central, axially downwardly projecting stamp ( 7 ) is formed on the inside of the capsule ( 18 ) below the push button ( 2 ), and that at least two spreading legs ( 8 ), which can be pivoted downwards and outwards to the closure axis of rotation ( 21 ), are formed around the circumference of this stamp ( 7 ), which taper off via their end region into an elastically bendable tapering as feet ( 26 ), further that the capsule lid ( 6 ) is designed to be corrugated around the stamp ( 7 ) when viewed in the radial direction, wherein this capsule lid ( 6 ) is designed in the first, inner corrugated area ( 10 ) of its radius with a thinner wall thickness than in the second, outer corrugated area ( 11 ), such that the lid wall can be flexed in two phases by pressing the push button ( 2 ) from above, in that the inner lid region ( 10 ) is first flexable by axially depressing the push button ( 2 ), until the stamp ( 7 ) applies pressure to the sealing washer ( 3 ) at pressure points ( 23 ) and thereby pretensions said sealing washer and the spreading legs ( 8 ) touch the sealing washer ( 3 ), thereafter the outer corrugated area ( 11 ) can be flexed by further depressing the push button ( 2 ) and thus the end regions of the spreading legs ( 8 ), while the stamp ( 7 ) breaks through the sealing washer ( 3 ), pivot the resulting loose sealing washer segments downwards so that the opening of the capsule ( 4 ) is exposed. 
     
     
         2 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the stamp ( 7 ) is star-shaped in cross-section and forms radially protruding wings ( 27 ) so that it forms a two-dimensional end, which is intended to act as a support for a sealing washer ( 3 ) pressed on from below by outgassing the contents of the bottle, whereby this sealing washer ( 3 ) is a plastic disc, which is provided with a barrier coating ( 36 ) over its entire extent, wherein the plastic disc by means of at least one diametrical slit ( 29 ) and at least two arc-shaped slits ( 30 ,  31 ) adjoining the ends of this slit ( 29 ) with their middle, which each leave a material bridge ( 32 ,  33 ) as a hinge between their ends, forms two otherwise free semicircle segments ( 34 ,  35 ), which can be pivoted in a hinge-like manner around the material bridges ( 32 ,  33 ) by means of pressure from the stamp ( 7 ) from above after bursting the coating ( 36 ) on their underside. 
     
     
         3 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the spreading legs ( 8 ) touch the sealing washer ( 3 ) and when depressing the push button ( 2 ) the end regions ( 26 ) of the spreading legs ( 8 ) bend elastically outwards and slide radially outwards on the sealing washer ( 3 ) near to the slits ( 30 ,  31 ) and generate a shearing effect and a break there, and their ends ( 26 ), while the stamp ( 7 ) breaks through the sealing washer ( 3 ), pivot the resulting loose sealing washer segments downwards so that the opening of the capsule ( 4 ) is exposed. 
     
     
         4 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the capsule lid ( 6 ) is designed to be corrugated around the stamp ( 7 ) when viewed in the radial direction, wherein the capsule lid ( 6 ) in the first, inner region ( 10 ) of its radius forms a wave shape with a thinner wall thickness with at least one wave trough ( 12 ) and one wave crest ( 13 ), and then the area ( 11 ) of its radius with a thicker wall thickness also forms a wave shape having at least one wave trough ( 4 ) and one wave crest ( 5 ) so that the capsule lid ( 6 ) can be flexed in two phases by pressing the push button ( 2 ) from above, with the push button ( 2 ) moving axially downwards. 
     
     
         5 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein that the capsule lid ( 6 ) is designed to be corrugated around the stamp ( 7 ) when viewed in the radial direction, wherein the capsule lid ( 6 ) in the first, inner region ( 10 ) of its radius is designed with a thinner wall thickness than in the outer region ( 11 ), and this capsule cover ( 6 ) subsequently forms a wave trough ( 12 ) and then a wave crest ( 13 ), viewed in the radial direction, on the push button ( 2 ), and then the second region ( 11 ) forms a wave trough ( 4 ) and then a wave crest ( 5 ), which is transferred into the yet larger dimensioned capsule wall ( 25 ). 
     
     
         6 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the push button ( 2 ) in the capsule lid ( 6 ) is formed as an overturned cup ( 9 ) that widens conically at the bottom, with the central stamp ( 7 ) on the inside, and that the spreading legs ( 8 ) are produced and formed by recesses ( 15 ) in the cup wall ( 9 ). 
     
     
         7 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the push button ( 2 ) forms a concave pusher surface ( 24 ) on its outer, upper side, with a circumferential upwardly directed edge ( 14 ) tapering to an acute angle, for centring and axial guidance of a finger pressing on the push button ( 2 ). 
     
     
         8 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the sealing washer ( 3 ) is divided into three segments ( 22 ) with three radial and arcuate weakening lines ( 39 ) distributed around the circumference in the form of thin spots or slits ( 30 ,  31 ) and three spreading legs ( 8 ) are each intended to hit the middle of each circle segment circumference, for pivoting the same when the push button ( 2 ) and stamp ( 7 ) are pressed down around regions of this circle segment formed as pressure points ( 23 ) on the edge of the sealing washer ( 3 ). 
     
     
         9 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 1 , wherein the sealing washer ( 3 ) is divided into four segments ( 22 ) with four arcuate weakening lines ( 39 ) distributed around the circumference and radial weakening lines ( 29 ), each in the form of thin spots or slits and four spreading legs ( 8 ) are each intended to hit the middle of each circle segment, for pivoting the same when the push button ( 2 ) and stamp ( 7 ) are pressed down around four regions, acting as pressure points ( 23 ) on the edge of the sealing washer ( 3 ) of these circle segments ( 22 ). 
     
     
         10 . The fillable sealing cap ( 1 ), screwable or attachable to a threaded connector of a container, according to  claim 8 , wherein the spreading legs ( 8 ) are widened at their ends ( 26 ), so that the torn circle segments ( 22 ) of the sealing washer ( 3 ) are held in this open position after being pivoted downwards so that the capsule ( 18 ) can be completely emptied into the container below.