Pinching seal for airtight containers

Abstract

A cosmetic product container includes a dish and a cover, the dish having a base and a lateral wall, and the cover being equipped with a seal typically placed at the periphery of the cover. The seal includes at least one substantially axial internal lip and one substantially axial external lip that surround a recess intended to receive the upper edge of the lateral wall of the dish, the seal being designed so that when the upper edge of the lateral wall of the dish comes into contact with the base of the recess by transmitting an axial closing force (F) on the seal, the ends of the internal and external lips are subjected respectively to a centrifugal (E) and centripetal (I) lateral movement so that both come into contact with the lateral wall of the dish. The container may be a refill or a pan for a make-up compact.

1 . A container for a cosmetic product comprising: 
 a dish, the dish having a base and a lateral wall; and    a cover including a seal disposed generally at the periphery of the cover, the seal comprising: 
 at least one substantially axial internal lip having an end;  
 at least one substantially axial external lip having an end; and  
 a recess disposed between the internal and external lips, the recess having a base and configured to receive an upper edge of the lateral wall of the dish when an axial closing force is transmitted onto the seal and the upper edge of the lateral wall of the dish comes into contact with the base of the recess, subjecting the ends of the internal and external lips, respectively, to a centrifugal and centripetal lateral movement.  
   
   
   
       2 . The container according to  claim 1 , wherein the seal follows a closed contour of which the shape at rest corresponds to the general shape of the upper edge of the lateral wall of the dish.  
   
   
       3 . The container according to  claim 1 , wherein the recess has a width slightly greater than the thickness of the upper edge of the lateral wall of the dish and a height at least equal to half of the thickness of the upper edge of the lateral wall of the dish.  
   
   
       4 . The container according to  claim 1 , wherein the internal and external lips have a comparable flexibility so that the centripetal and centrifugal lateral movements of their ends resulting from the application of the closing force have substantially the same amplitude.  
   
   
       5 . The container according to  claim 1 , wherein the external lip is less flexible than the internal lip and the external lip comprises an end that, without the application of the closing force, is already located near the lateral wall of the dish, and the closing force on the seal causes substantially greater centrifugal movement of the end of the internal lip than centripetal movement of the end of the external lip.  
   
   
       6 . The container according to  claim 1 , wherein the base of the recess can easily be bowed under the effect of the axial closing force so that the axial movement of the axial closing force causes a bend in the seal resulting in a pinching of the internal and external lips on the upper edge of the lateral wall and creating at least two airtight contact areas.  
   
   
       7 . The container according to  claim 1 , wherein the ends of the lips comprise gadroons on their opposing surfaces, the smaller radius of curvature of the gadroons providing more precise localizations of the areas of contact with the lateral wall of the dish.  
   
   
       8 . The container according to  claim 1 , wherein the cross-section of the seal has a thickness smaller than one-fifth of the height of the substantially axial lips, and the upper edge of the lateral wall of the dish has a rounded shape.  
   
   
       9 . The container according to  claim 1 , wherein the dish is made of a material that acts as a diffusion barrier to a volatile product contained in the cosmetic product thus packaged.  
   
   
       10 . The container according to  claim 1 , wherein the seal further comprises a central portion, and the seal completely covers the cover and is made of a material that acts as a diffusion barrier to a volatile product contained in the cosmetic product thus packaged.  
   
   
       11 . A compact intended for packaging a cosmetic product for facial care that includes a compound that is volatile or sensitive to air, the compact comprising: 
 a cover;    a base equipped with an intermediate support for at least one pan configured to receive the cosmetic product;    the pan comprising: 
 a dish with a base and a lateral wall; and  
 a cover including a seal comprising at least two substantially axial lips with a recess disposed between the lips such that an axial closing force applied to the cover causes an upper edge of the lateral wall to be received in the recess, creating at least two airtight contact areas between the lips and the lateral wall.  
   
   
   
       12 . The container according to  claim 11 , wherein the seal follows a closed contour of which the shape at rest corresponds to the general shape of the upper edge of the lateral wall of the dish.  
   
   
       13 . The compact according to  claim 12 , wherein the form of the product is chosen from the group consisting of a gel, pressed powder, unpressed powder, foam, and a cream.  
   
   
       14 . The compact according to  claim 13 , wherein the axial lips comprise ends and the airtight contact areas are achieved when the axial closing force causes the ends of the lips to be subjected to lateral movement to come into contact with the lateral wall.  
   
   
       15 . The container according to  claim 11 , wherein the end of at least one of the lips comprises a gadroon.  
   
   
       16 . The container according to  claim 13 , wherein the seal further comprises a central portion, and the seal completely covers the cover and is made of a material that acts as a diffusion barrier to the product contained in the cosmetic product thus packaged.  
   
   
       17 . A container comprising: 
 a dish, the dish having a base and a lateral wall; and    a cover including a seal disposed substantially at the periphery of the cover, the seal comprising at least one generally axial internal lip and at least one generally axial external lip each having an end, and defining a recess between the lips, the recess configured to receive an upper edge of the lateral wall of the dish and configured to bow at a base portion when an axial closing force is transmitted onto the seal to provide at least two airtight contact areas between the seal and the lateral wall of the base.    
   
   
       18 . The container according to  claim 17 , wherein a cross-section of the seal comprises an H-shape, including: 
 a. an upper notch of the H-shape;    b. a lower notch of the H-shape; and    c. a horizontal bar of the H-shape, wherein the lower notch is configured to receive the upper edge of the lateral wall of the dish and the horizontal bar of the H-shape is configured to bow when the seal receives the upper edge of the lateral wall of the dish, the bowing causing the opening of the upper notch and the closing of the lower notch.    
   
   
       19 . The container according to  claim 17 , wherein a cross-section of the seal includes a hollow interior section near the recess, which may deform when the seal recess receives the upper edge of the lateral wall of the dish.  
   
   
       20 . The container according to  claim 17 , wherein the seal comprises an even cross-section over its entire length.