Dual seal closure-adaptor
AssigneeSunbeam Plastics Corporation
InventorJeffrey C. Minnette
Life of this patent
Estimating the term…
Abstract
An adaptor and a closure are formed with precision surfaces as by injection molding so that the closure can be attached to the adaptor without the use of excessive force to create a secondary seal. The adaptor-closure can then be attached to an imprecisely formed threaded container such as an extrusion-blow molded bottle to create a primary seal. The adaptor is permanently retained on the container with securing by thread wedging, cooperating ratchet teeth or the like.
Claims13
The combination of an adaptor and a closure for providing primary and secondary seals and a removable cap on a neck of a container having an imprecise external thread and an imprecise sealing surface, comprising in combination:
- a plastic adaptor molded with precision surfaces including precision attachment means for fastening a closure to said adaptor and a precision sealing surface and further including an internal thread for engaging the imprecise external thread on said container to establish said primary seal between said adaptor and the imprecise sealing surface of said container;
- securing means for securing said adaptor to said container to prevent unthreading of said adaptor from said container;
- a plastic closure molded with precision surfaces including a precision sealing surface and precision attachment means complementary to said adaptor attachment means for removable attachment thereto creating said secondary seal between the precision sealing surface of said closure and the precision sealing surface of said adaptor;
- at least one of said plastic adaptor and plastic closure including an axially extending tubular projection having its respective precision sealing surface;
- and
- wherein said adaptor has a through bore, which upon removal of said closure from said adaptor, provides open access to an interior of said container.
Dependencies are inferred from the claim text.