Chemical container cap breakseal, chemical container cap thereof, and chemical container assembly thereof

Abstract

A breakseal is for a chemical container cap. A chemical container cap includes a cap body and a breakseal. The breakseal is disposed in an opening of a hole in the cap body. The breakseal includes a base portion extending over the hole, an outer periphery portion extending outwards from the base portion, and a first ring protruding from the body portion. The base portion is configured to rupture under an external force. The outer periphery portion curves away from a plane of the base portion as the outer periphery portion extends outwards. The ring portion is configured to form a radial seal with a port of a chemical container. An assembly includes a chemical container with a port and a chemical container cap coupled to the chemical container over the port.

What is claimed is: 
     
         1 . An article comprising:
 a chemical container cap including:
 a cap body including a hole and an opening for the hole; and 
 a breakseal disposed in the opening of the cap body, the breakseal including:
 a base portion extending over the hole, the base portion configured to rupture under an external force, 
 an outer periphery portion extending outwards from the base portion, the outer periphery portion curving away from a plane of the base portion as the outer periphery portion extends outwards, and 
 a first ring protruding from the body portion, the ring portion configured to form a radial seal with a port of a chemical container. 
 
   
     
     
         2 . The article of  claim 1 , wherein the base portion includes an upper surface facing the hole in the cap body and a lower surface opposite to the upper surface, the outer periphery portion curving in a direction normal to the lower surface of the base portion, and the first ring protruding from the lower surface of the base portion. 
     
     
         3 . The article of  claim 2 , wherein the outer periphery portion extends outward from the base portion in a first direction, and the first ring protruding from the body portion in a second direction perpendicular to the first direction. 
     
     
         4 . The article of  claim 1 , wherein the first ring is configured to be inserted into the opening of the chemical container body, and the radial seal being formed between an outer circumferential surface of the first ring and an inner circumferential surface of the port of the chemical container. 
     
     
         5 . The article of  claim 1 , wherein the first ring is configured to surround the port of the chemical container, the radial seal formed between an inner circumferential surface of the first ring and an outer circumferential surface of the port of the chemical container. 
     
     
         6 . The article of  claim 1 , wherein the breakseal includes a second ring protruding from the body portion and encircling the first ring, a groove formed between the first ring and the second ring, and the groove configured to receive a neck that forms the port of the chemical container. 
     
     
         7 . The article of  claim 1 , wherein the breakseal is held in the opening of the cap body by outward tension of the outer periphery portion on an inner side surface of the opening of the cap body. 
     
     
         8 . The article of  claim 7 , wherein the breakseal disposed in the opening of the cap body with the outer periphery portion in a compressed state, and the compressed state of the outer periphery portion providing the outward tension of the outer periphery portion on the inner side surface of the opening of the cap body. 
     
     
         9 . The article of  claim 7 , wherein the outer periphery portion is configured to have reducible circumference that provides the outward tension of the outer periphery portion on an inner side surface of the opening of the cap body. 
     
     
         10 . The article of  claim 1 , wherein the hole is a blind hole in the cap body, the cap body includes a tear tab forming a rear of the blind hole, the tear tab is configured to be removed to reform the blind hole into a through-hole in the cap body. 
     
     
         11 . The article of  claim 1 , wherein
 the body portion of the breakseal includes an upper surface and a lower surface opposite to the upper surface, the first ring protruding from the lower surface of the body portion, and   the cap body includes a rib extending downward into the opening, the rib contacting the upper surface of the breakseal.   
     
     
         12 . The article of  claim 1 , wherein the base portion has a lower surface configured to form a face seal with an upper surface of the port of the chemical container. 
     
     
         13 . The article of  claim 1 , wherein a vertical cross-section of the base portion and the outer periphery portion form a concave shape. 
     
     
         14 . The article of  claim 1 , wherein the base portion includes at least one thinner portion configured to rupture under application of the external force that is at least a predetermined external pressure threshold. 
     
     
         15 . The article of  claim 1 , wherein the breakseal is a molded thermoplastic polymer. 
     
     
         16 . An article comprising:
 a breakseal for a chemical container cap, the breakseal including:
 a base portion configured to be externally rupturable, 
 an outer periphery portion extending outward from the base portion, the outer periphery portion curving away from a plane of the base portion as the outer periphery portion extends outwards, the outer periphery portion configured such that a circumference of the outer periphery portion is reducible so as to provide tension against an opening for a hole in a chemical container cap to thereby hold the breakseal in the opening with the base portion extending over the hole, and 
 a first ring protruding from the body portion, the ring portion configured to form a radial seal with a port of a chemical container. 
   
     
     
         17 . The article of  claim 16 , wherein the base portion includes an upper surface and a lower surface opposite to the upper surface, the outer periphery portion curving in a direction normal to the lower surface of the base portion, and the first ring protruding from the lower surface of the base portion. 
     
     
         18 . The article of  claim 16 , wherein a vertical cross-section of the base portion and the outer periphery portion form a concave shape. 
     
     
         19 . The article of  claim 16 , wherein the breakseal is a single component formed of polyfluoroalkyl (PFA) polymer. 
     
     
         20 . An assembly comprising:
 a chemical container including a port;   a chemical container cap coupled to the chemical container over the port, the chemical container cap including:
 a cap body including a hole and an opening for the hole; and 
 a breakseal disposed in the opening of the cap body and over the port, the breakseal including:
 a base portion extending over the hole, the base portion configured to rupture under an external force, 
 an outer periphery portion extending outwards from the base portion, the outer periphery portion curving away from a plane of the base portion as the outer periphery portion extends outwards, and 
 
 a first ring protruding from the body portion, the ring portion forming a radial seal with the port of the chemical container.