Patent ID: 7841483

Claim:
A double cap system for the handling and transfer of hazardous materials, comprising: a first cap ( 4 ) of a first container, the first cap including a first gasket ( 5 ) and a first metallic flange ( 3 ); a second cap ( 2 ) of a second container (a) coupled to the first cap, the second cap having a second metallic flange ( 1 a ) that contains a second gasket ( 6 ) and a third metallic flange ( 1 b ); wherein both caps are made of metallic materials that couple to form the double cap; wherein the first metallic flange ( 3 ) and the second and third metallic flanges are mutually coupled; wherein a metal-metal sealing contact is defined between the first cap ( 4 ) and the first flange ( 3 ), between second flange ( 1 a ) and the first flange ( 3 ), between second flange ( 1 a ) and second cap ( 2 ), and between second cap ( 2 ) and the first cap ( 4 ); wherein the first gasket ( 5 ) and the second gasket ( 6 ) are of elastomeric material with microalveolar internal structure and have polygonal sections including vertexes; and wherein the first gasket ( 5 ) and the second gasket ( 6 ) are coupled face to face by the edges of one of its vertex ( 5 ′, 6 ′) forming a linear contact between them.