Lid device for wide-mounted container and method of producing the same
AssigneeTenryu Chemical Industry Co., Ltd.
InventorYoshiaki Yoshida
Life of this patent
Estimating the term…
Abstract
A lid device for a wide-mouthed container comprises a metallic lid body having an inner margin defining an opening of a predetermined shape, and a closure member made of a soft synthetic resin for closing said opening of said lid body. The closure member is integrally formed with a pull tab used to open the closure member along a weakening line. The entire outer surface of the closure member is covered by a vapor impervious film, so that passage of water vapor through the lid device can be prevented even if the closure member itself is vapor pervious.
Claims16
A lid device for a wide-mouthed container comprising:
- a lid body fittable to an open mouth of the container, said lid body having an inner margin defining an opening of a predetermined shape;
- a closure member for closing said opening of said lid body, said closure member being integrally made of a soft synthetic resin, said closure member being formed with a weakening line extending along said inner margin of said lid body to define an openable portion;
- and
- an externally located pull tab connected to said openable portion of said closure member at a position adjacent to said weakening line;
- wherein
- said inner margin of said lid body has a bent portion directed radially outward;
- and
- said closure member has an anchoring portion located radially outwardly of said weakening line, said anchoring portion completely enclosing said inner margin, including said bent portion, of said lid body for connection thereof;
- whereby
- said anchoring portion remains entirely connected to said inner margin even when said openable portion is tear-opened along said weakening line.
A lid device for a wide-mouthed container comprising:
- a lid body fittable to an open mouth of the container, said lid body having an inner margin defining an opening of a predetermined shape;
- a closure member for closing said opening of said lid body, said closure member being integrally made of a soft synthetic resin, said closure member being formed with a weakening line extending along said inner margin of said lid body to define an openable portion;
- and
- an externally located pull tab connected to said openable portion of said closure member at a position adjacent said weakening line;
- wherein
- said closure member has an outer margin enclosing said inner margin of said lid body for connection thereto;
- said weakening line is looped and located at said outer margin of said closure member;
- said inner margin of said lid body has a diametrically smaller cylindrical portion, and a diametrically larger cylindrical portion separated from said smaller cylindrical portion by an engaging step;
- and
- said outer margin of said closure member has a plugging portion located radially inwardly of said inner margin of said lid body for engagement with said engaging step, and a retainer portion integrally connected to said plugging portion via said weakening line and located radially outwardly of said inner margin of said lid body;
- whereby
- said openable portion of said closure member includes said plugging portion to work as a plug re-insertable into said opening of said lid body even after opening of the lid device.
Dependencies are inferred from the claim text.