Sanitary double cap allowing addition of adjunct to contents of a container
Disclosed herein is double cap having a lower cap rotatably connected to an upper cap. The lower cap has an insertion pipe body defining an adjunct receiving chamber therein. The insertion pipe body has a bottom opening covered by a bottom cover. A plurality of rib protrusions is provided on an inner surface of the insertion pipe body. First and second steps are formed on an upper end of the lower cap and stepped downward from an upper end of the adjunct receiving chamber. A push member, having a push pipe body is received in the adjunct receiving chamber of the lower cap, with a plurality of guide protrusions formed on the exterior of the push pipe body, so that the rib protrusions of the lower cap are guided by the guide protrusions to guide the upward and downward movement of the push member. External push threading is provided around a circumferential outer surface of the push member. The upper cap has internal threading provided for engagement with the external push threading formed on the push member to provide an upward and downward moving force for the push member relative to the direction of rotation of the upper cap, so that, when the upper cap is rotated in a predetermined direction, the push member moves downward to open the bottom cover.
1. A double cap for use with a container, said container having a neck and an opening leading into the container, said double cap comprising: a lower cap having an insertion pipe body, said insertion pipe body defining an adjunct receiving chamber therein, said insertion pipe body having a bottom opening, a bottom cover covering the bottom opening of the insertion pipe body; an upper cap rotatably connected to the lower cap; a push member disposed in the adjunct receiving chamber of the lower cap; the upper cap engaged to the push member in a manner so that rotation of the upper cap in a predetermined direction pushes the push member downward to cause at least a portion of the bottom cover to be removed from the bottom of the insertion pipe body to expose said bottom opening; further comprising: a plurality of rib protrusions provided on an inner surface of the insertion pipe body; a plurality of guide protrusions provided on an outer surface of the push member, and, wherein the rib protrusions and guide protrusions are formed and positioned to guide the upward and downward movement of the push member.
2. A double cap for use with a container, said container having a neck with an external threading and an opening leading into the container, said double cap comprising: a lower cap having an insertion pipe body, said insertion pipe body defining an adjunct receiving chamber therein, said insertion pipe body having a bottom opening, internal threading formed on an inner surface of the lower cap for engagement with the external threading of the container; a first step and second step formed on an upper end of the lower cap; a bottom cover covering the bottom opening of the insertion pipe body; an upper cap rotatably connected to the lower cap, said upper cap having a crown member and an outer wall extending downward from said crown member; a subsidiary pipe body extending downward from the crown member inward from the outer wall; a push member disposed in the adjunct receiving chamber of the lower cap and within the subsidiary pipe body of the upper cap; and, the upper cap engaged to the push member in a manner so that rotation of the upper cap in a predetermined direction pushes the push member downward to cause at least a portion of the bottom cover to be removed from the bottom of the insertion pipe body to expose said bottom opening; further comprising: a plurality of rib protrusions provided on an inner surface of the insertion pipe body; a plurality of guide protrusions provided on an outer surface of the push member; and, wherein the rib protrusions and guide protrusions are formed and positioned to guide the upward and downward movement of the push member.
3. A double cap for use with a container, said container having a neck and an opening leading into the container, said double cap comprising: a lower cap having an insertion pipe body, said insertion pipe body defining a pipe body receiving chamber therein, said insertion pipe body having a bottom opening, a bottom piercing member provided at the bottom opening of the insertion pipe body, said bottom piercing member having several adjunct passing apertures; an upper cap rotatably connected to the lower cap; a push member disposed in the pipe body receiving chamber of the lower cap; said push member having an open bottom end; a cover covering the open bottom end of the push member to define a storage chamber within said push member; the upper cap engaged to the push member in a manner so that rotation of the upper cap in a predetermined direction pushes the push member downward to cause the cover at the bottom end of the push member to be pierced by bottom piercing member of the insertion pipe body; further comprising: a plurality of rib protrusions provided on an inner surface of the insertion pipe body; a plurality of guide protrusions provided on an outer surface of the push member; and, wherein the rib protrusions and guide protrusions are formed and positioned to guide the upward and downward movement of the push member.