| 摘要 |
PURPOSE:To eliminate useless projections so as to make the packing easier by providing at the forward end of a strap an upper lid which closes an outlet at the center of a main lid and by forming a sunken part from the point of attachment of the strap to the center in such a manner as to make the outer surface of the strap curve in alignment with the curved surfaces of the main lid at the two lateral sides of the strap when the upper lid on the strap closes the outlet. CONSTITUTION:A double lid is produced from polyethylene resin by injection molding. The main lid 1 is cylindrical in shape; it serves as a ceiling and has an outlet 11 at the center of the ceiling. An internal cylindrical wall 12 whose shape enlarges somewhat with height is raised around the outlet 11. The main lid has raised parts 13, 13 positioned opposite to each other at two sides of the internal cylindrical wall 12. A strap 2 forming at its forward end an upper lid 3 having an external cylindrical wall 31 whose shape inwardly narrows progressively extends from the edge of the main lid 1 and between the raised parts 13, 13. The external cylindrical wall 31 of the upper lid 3 is fitted over the internal cylindrical wall 12 of the main lid 1 in a manner of enveloping the latter inside the former. Then the strap 2, extending to the upper lid 3, assumes substantially the same configuration, with respect to the upper surface, as the raised parts 13, 13 and the top side of the lid as a whole appears neat. |
