US2010176134A1PendingUtilityA1

Retortable Closures and Containers

33
Individually held — no corporate assignee on recordPriority: Jul 22, 2008Filed: Jul 17, 2009Published: Jul 15, 2010
Est. expiryJul 22, 2028(~2 yrs left)· nominal 20-yr term from priority
Inventors:Kenneth M. Cramer
B65D 41/045B65D 51/145
33
PatentIndex Score
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Claims

Abstract

A retortable container (C) or a retortable closure ( 10 ) for use with the container (C). A receptacle (R) is included that may incorporate fasteners (F) attaching the closure ( 10 ). The closure ( 10 ) includes a retainer ( 20 ) received with a sealing barrier ( 100 ) formed from a polymeric material. The sealing barrier ( 100 ) includes a heat transfer material such as powdered metal in a volume that is between about 25% and about 65% of the closure ( 10 ) and an an oxygen barrier material such as a nanocompound or other barrier material having a relative volume of approximately between 10% and 60%. Variations of the closure ( 10 ) may incorporate seal layer of a thermoplastic elastomeric vulcanizate such as a santoprene and the heat transfer material may be an economically attractive powdered and/or oxide material such as zinc, aluminum, copper, nanotube, or similarly available material, which preferably is diffused throughout the closure ( 10 ).

Claims

exact text as granted — not AI-modified
1 . A retortable closure, for use with a container that includes a side wall formed with a container fastener about an upper finish portion proximate to a rim that defines an opening into the container, the retortable closure comprising:
 a polymeric retainer formed with a fastener arranged to releasably engage the container fastener;   a sealing disc received in the retainer and formed from a volume of a polymeric material and having an interior surface;   a heat transfer material diffused throughout the sealing disc and formed from a volume that is between about 25% and about 65% of the volume of polymeric material; and   an oxygen barrier formed integrally with the sealing disc from a volume that is between about 10% and about 65% of the volume of polymeric material.   
     
     
         2 . The retortable closure according to  claim 1 , wherein the volume of polymeric material is a thermoplastic and the volume of heat transfer material is substantially a powdered zinc. 
     
     
         3 . The retortable closure according to  claim 2 , further comprising:
 a seal layer formed from a substantially thermoplastic elastomeric vulcanizate about the interior surface; and   wherein the polymeric material is substantially a polypropylene.   
     
     
         4 . The retortable closure according to  claim 3 , wherein the thermoplastic elastomeric vulcanizate is substantially a santoprene. 
     
     
         5 . The retortable closure according to  claim 3 , wherein the volume of polymeric material is substantially a polypropylene and the volume of heat transfer material is substantially a powdered copper. 
     
     
         6 . The retortable closure according to  claim 5 , wherein the seal layer is substantially a santoprene. 
     
     
         7 . The retortable closure according to  claim 1 , wherein the volume of polymeric material is substantially a polypropylene and the volume of heat transfer material is substantially a powdered aluminum. 
     
     
         8 . A retortable closure, for use with a container that includes a side wall formed with a container fastener about an upper finish portion proximate to a rim that defines an opening into the container, the retortable closure comprising:
 a polymeric crown formed with a circumferential wall surrounding a substantially planar sealing barrier having an interior surface, the circumferential wall formed with a fastener arranged to releasably engage the container fastener, the sealing barrier including an oxygen scavenger;   a seal layer about the interior surface; and   a heat transfer material diffused throughout the sealing barrier to have a volume that is approximately between 25% and 60% of the volume of the sealing barrier.   
     
     
         9 . The retortable closure according to  claim 8 , wherein the polymeric crown and the sealing barrier are formed substantially from a polypropylene and the heat transfer material is substantially a powdered zinc. 
     
     
         10 . The retortable closure according to  claim 9 , wherein the seal layer is substantially a thermoplastic elastomer vulcanizate. 
     
     
         11 . The retortable closure according to  claim 9 , wherein the oxygen scavenger is substantially a nanocompound having a volume that is between about 10% and about 65% of the volume of sealing barrier; and
 wherein the seal layer is substantially a thermoplastic elastomeric vulcanizate.   
     
     
         12 . The retortable closure according to  claim 8 , wherein the sealing barrier is substantially a polypropylene and the heat transfer material is substantially a zinc powder. 
     
     
         13 . The retortable closure according to  claim 12 , wherein the seal layer is substantially a santoprene. 
     
     
         14 . A retortable container, comprising:
 a receptacle including a side wall formed with a fastener about an upper finish portion proximate to a rim defining an opening into the receptacle;   a plastic retainer formed with a fastener arranged to releasably engage the side wall fastener;   a sealing disc received in the retainer and formed from a volume of a polymeric material having an interior surface;   a heat transfer material diffused throughout the sealing disc from a volume of between about 25% and about 65% of the volume of polymeric material; and   an oxygen barrier formed integrally with the sealing disc from a volume of between about 10% and about 65% of the volume of polymeric material.   
     
     
         15 . The retortable container according to  claim 14 , further comprising:
 a seal layer formed about the interior surface with a substantially thermoplastic elastomeric vulcanizate; and   wherein the volume of polymeric material is substantially a polypropylene and wherein the volume of heat transfer material is substantially a powdered zinc.   
     
     
         16 . The retortable container according to  claim 15 , wherein the thermoplastic elastomeric vulcanizate is substantially a santoprene. 
     
     
         17 . The retortable container according to  claim 15 , wherein the thermoplastic elastomeric vulcanizate is substantially a super thermoplastic elastomer vulcanizate. 
     
     
         18 . The retortable container according to  claim 14 , wherein the volume of polymeric material is a thermoplastic and the volume of heat transfer material is substantially a powdered copper. 
     
     
         19 . The retortable container according to  claim 18 , further comprising:
 a seal layer formed about the interior surface from a substantially thermoplastic elastomeric vulcanizate.   
     
     
         20 . The retortable container according to  claim 14 , wherein the volume of polymeric material is substantially a polypropylene and the volume of heat transfer material is substantially a powdered aluminum. 
     
     
         21 . A retortable canister, comprising:
 a vessel that includes a side wall formed with a vessel fastener about an upper finish proximate to a rim defining an opening into the vessel;   a polymeric crown formed with a circumferential wall surrounding a substantially planar sealing wall having an interior surface, the circumferential wall having a fastener to releasably engage the vessel fastener, the sealing wall including an oxygen scavenger; and   a heat transfer material diffused throughout a volume of the sealing wall and having a volume of between about 25% and about 65% of the volume of the sealing wall.   
     
     
         22 . The retortable canister according to  claim 21 , further comprising:
 a seal layer formed about the interior surface from a substantially thermoplastic elastomeric vulcanizate; and   wherein the polymeric crown and the sealing wall are formed substantially from a polypropylene and the heat transfer material is substantially a powdered zinc.   
     
     
         23 . The retortable canister according to  claim 21 , wherein the oxygen scavenger is substantially a nanocompound integrally diffused into the sealing wall to have a volume of approximately between 10% and 60% of the volume of sealing wall. 
     
     
         24 . The retortable closure according to  claim 23 , further comprising:
 a seal layer formed about the interior surface substantially from a thermoplastic elastomeric vulcanizate; and   wherein the heat transfer material has a volume of a powdered substantially zinc material.   
     
     
         25 . The retortable closure according to  claim 24 , wherein the thermoplastic elastomer vulcanizate is substantially a santoprene.

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