A linerless closure of one-piece integrally molded plastic construction includes a base wall and a cylindrical skirt for attaching the closure to a container neck finish. First and second circumferentially continuous annular walls extend from the base wall at positions radially inward from the skirt. The first and second annular walls are spaced from each other to receive an end portion of the container neck finish when the closure is applied to the neck finish. At least one of the annular walls has a circumferentially continuous annular projection extending toward the opposing annular wall. The annular projection is axially flexible for bending and folding toward the base wall and toward the at least one annular wall in sealing engagement with the end portion of the container neck finish when such end portion is received between the annular walls.
Timothy J. Fuchs - Perrysburg OH, US Carl R. Smith - Perrysburg OH, US
International Classification:
B65D 53/00
US Classification:
215344
Abstract:
A closure for sealing engagement with a container neck finish having at least one external thread segment includes a base wall having a skirt with at least one internal thread segment for engagement with the at least one external thread segment to thread the closure onto the container neck finish. A first flexible resilient annular wall extends from the base wall within the skirt and is positioned for sealing engagement with an inside surface of the container neck finish when the closure is threaded onto the neck finish. A second flexible resilient annular wall extends from the base wall between the first annular wall and the skirt, and is positioned for sealing engagement with an outside surface of the container neck finish when the closure is threaded onto the container neck finish. A circumferential series of external first axial ribs are on the first annular wall and a circumferential series of internal second axial ribs are on the second annular wall. The first and second series of ribs angularly alternate around the first and second annular walls, and function both to stiffen the first and second annular walls and to limit penetration of the container neck finish between the first and second annular walls.
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Timothy Fuchs
Timothy Fuchs
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