Patent ID: 6322739
Filing Date: 2001-11-27
Classification: B29C,B29K,B29L,B65D,Y10S,Y10T

Abstract:
A method of preparing two-part pharmaceutical closures comprising a sleeve-formed carrier made of a polyolefinic material coaxially enclosing a cylindrical elastomeric penetrable plug, wherein a carrier part is separately formed in a molding process and comprises a narrow annular channel extending axially along the inner periphery of an upper part, the annular channel being connected by at least one shallow groove which is radially extended in the upper surface of a partition of the carrier, whereupon heated elastomer is introduced into said carrier in an injection molding process at a high pressure to form a penetrable plug and whereupon it is allowed a relaxation period for the elastomer material to settle and develop its resealing characteristics.