Resources Contact Us Home
Plastic closure with compression molded layered barrier liner

Image Number 3 for United States Patent #6660349.

A plastic closure includes a closure shell having a base wall, a peripheral skirt with an internal thread for securing the closure to a container finish, and an annular lip extending from the closure skirt adjacent to the base wall and defining an inside lip surface at an acute angle to the closure base wall. A liner is compression molded in situ onto the base wall and peripherally within the lip. The liner has a liner base portion extending along the base wall and a peripheral portion extending along the inside surface of the lip. The liner has an interior surface--i.e., facing away from the shell base wall and skirt--that has a first flat axially facing portion on the base portion of the liner adjacent to the peripheral portion, an inwardly concave portion where the base portion blends into the peripheral portion of the liner, a second flat axially facing portion at an edge of the peripheral portion of the liner, and a conical portion that extends from a radially outer edge of the second flat portion to the inside surface of the lip. Provision of the second flat axially facing surface portion at the periphery of the liner has been found to reduce tearing of the liner and separation of layers in the liner when the liner is of layered construction.

  Recently Added Patents
Table base
Bundled flexible cable with water resistant structure
Under bump passive components in wafer level packaging
Auto-provisioning of network services over an Ethernet access link
Implantable device
Method for eliciting an immune response to human telomerase reverse transcriptase
Method of interfacing a host operating through a logical address space with a direct file storage medium
  Randomly Featured Patents
Movable puzzle
Method and apparatus for encoding and decoding high frequency signal
Methods for diagnosing episodic movement disorders and related conditions
Plant container liners
Aryl-substituted bridged or fused diamines as modulators of leukotriene A.sub.4 hydrolase
Double plane bend former
Moisture management sock
Modified penetrating keratoplasty method
Extractable filler for inserting medicine into animal tissue
Driving circuit for lamp