Patent ID: 6030582
Filing Date: 2000-02-29
Classification: B01L,Y10T

Abstract:
A self-resealing container cap puncturable by a tubular implement having a blunt ended tip of given tip width, comprising:a cap periphery of relatively inelastic material configured to make closing engagement with a container and an initially unbroken septum of elastomeric material supported in a hole defined in said cap periphery, said septum having an annular outer portion radially contained by said cap periphery and a circular depression centered in said outer portion, said circular depression diminishing in thickness from said outer portion to a central area of minimum thickness, said minimum thickness being less than the thickness of said annular outer portion, said septum being arranged, shaped and sized for returning to a condition substantially sealed against significant leakage of liquid from the container through said septum after said area of minimum thickness is torn by perforation with a blunt ended implement having a tip width substantially greater than said minimum thickness.