Powder Case

Abstract

The powder case contains two concentric ring slots on a top side of the inner case for installing a block ring and an elastic seal ring. When the inner case is closed by an inner cap, the inner case is reliably sealed, greatly enhancing the airtightness of the powder case and effectively preventing the stored powders from spilling outside the powder case. Additionally, the powder case contains an outer case to house the inner case. When an outer cap to the outer case is closed, it depresses protruding pieces configured around the top side of the inner case so as to further enhance the airtightness of the powder case.

I claim: 
     
         1 . A powder case comprising an inner case and an outer case having an indentation housing the inner case, the inner case being sealed by an inner cap, the outer case being sealed by an outer cap, the powder case characterized in that the inner case comprises two concentric ring slots on a top side of the inner case, and a block ring and an elastic seal ring installed in the ring slots so that, when the inner and outer cases are closed by the inner and outer caps, the powder case is reliably sealed. 
     
     
         2 . The powder case according to  claim 1 , wherein the block ring has an inverted-L cross section. 
     
     
         3 . The powder case according to  claim 1 , wherein the seal ring has a T-like cross section. 
     
     
         4 . The powder case according to  claim 1 , wherein the seal ring is formed by injection molding a flexible material on to the inner case. 
     
     
         5 . The powder case according to  claim 1 , wherein a plurality of protruding pieces are equally spaced along a top rim of the inner cap; and the protruding pieces are slant outward for different angles but of a same height for conveniently flipping open the inner cap. 
     
     
         6 . The powder case according to  claim 1 , wherein a plurality of snapping pieces are configured along a circumferential wall of the indentation; and, correspondingly, a ring slot is configured along a circumference of the inner case so that, as the inner case is placed in the outer case, the snapping pieces are embedded into the ring slot.