초록 ▼

A dual cap lining for bi-directional venting comprising a substantially round, disc-shaped, laminated, fluid-impermeable, gas-permeablematerial bottom layer, and having an extruded and cast polyethylene material top layer which is provided with apertures which communicate with the bottom layer and a

A dual cap lining for bi-directional venting comprising a substantially round, disc-shaped, laminated, fluid-impermeable, gas-permeablematerial bottom layer, and having an extruded and cast polyethylene material top layer which is provided with apertures which communicate with the bottom layer and also communicate with channels provided on the upper surface of the top layer, and the material of construction of the laminated bottom layer is gas-permeable such that the dual lining allows bi-directional gas flow therethrough, for gases which have built-up in the interior of the connected container to safely escape by venting from the interior of the container to the external ambient atmosphere through openings existing between the spiral screw threads of the cap closure and threads of the container neck, and the reverse venting to equilibrate for relatively increased external pressure, without passage of solid or liquid material from the interior of the container through the lining to the closure and to the exterior of the container.

대표청구항 ▼

[ What is claimed is:] [1.] A bi-directional venting cap liner comprising:(a) a substantially disc-shaped bottom layer of substantially fluid-impermeable, gas-porous material;(b) said bottom layer having opposing first and second surfaces wherein said first surface is adjacent to a container opening

[ What is claimed is:] [1.] A bi-directional venting cap liner comprising:(a) a substantially disc-shaped bottom layer of substantially fluid-impermeable, gas-porous material;(b) said bottom layer having opposing first and second surfaces wherein said first surface is adjacent to a container opening when the cap liner is secured in place to a container;(c) a substantially disc-shaped top layer of elastomeric material having opposing first and second surfaces, said second surface of said bottom layer is laminated to said first surface of said top layer; and(d) said second surface of said top layer having at least one channel therein extending across said surface and having spaced apart apertures therethrough in communication with said channel on the second surface of the top layer and in communication with said second surface of said bottom layer.