| 摘要 |
A feeder cap used for liquid containers of duplicating machines, etc. The feeder cap comprises a cap body provided on its inner surface with a threaded portion fitting the threaded mouth of a container, a hollow cylinder through which liquid is supplied from the container, the hollow cylinder being disposed in the center of, and passing through, the cap body, a nonrotatable valve stem or rod disposed in the center of the hollow cylinder so as to pass through the hollow cylinder, a spring surrounding the valve rod, an engagement piece fixed to the upper end of the valve rod, the engagement piece being provided on opposing sides thereof with projecting portions or ears, each having an inclined lower edge, a valve which fits the lower end (valve seat) of the hollow cylinder and is attached to the lower end of the valve rod, an auxiliary cap detachably fitted to the upper portion of the hollow cylinder, a supporting plate (disc) disposed inside the auxiliary cap at right angles to the valve rod, the supporting plate being provided in its center with an opening, circular in the center with a slot to each side, into which the engagement piece is inserted, each side of the opening having an arc-shaped inclined portion whose upper and lower surfaces are both inclined. The inclined portions are adapted so that the inclined lower edges of the engagement piece move onto the upper surfaces of the inclined portions from their lower portions when the auxiliary cap is turned in a certain direction (Clockwise) and that the projecting portions of the engagement piece move under the lower surfaces of the inclined portions from their higher portions when the auxiliary cap is turned in the opposite direction. Thus, when the auxiliary cap is turned in the clockwise direction, the valve rod is pulled up and the valve is strongly pressed against the lower end of the hollow cylinder so as to prevent the leakage of liquid in the container during storage or transportation. When the auxiliary cap is turned in the opposite direction so as to remove it from the cap body, the valve rod is pushed down and the valve is separated from the lower end of the hollow cylinder so as to eliminate the sticking of the valve thereto. When the auxiliary cap has been removed from the upper portion of the hollow cylinder, the valve remains in contact with the lower end of the hollow cylinder.
|
