US 12,351,367 B2
Pulp-molded cup lid with leakproof structure
Chien-Kuan Kuo, New Taipei (TW); and Chun-Huang Huang, New Taipei (TW)
Assigned to GOLDEN ARROW PRINTING TECHNOLOGY (KUNSHAN) CO., LTD., Kunshan (CN)
Filed by Golden Arrow Printing Technology (Kunshan) Co., LTD., Kunshan (CN)
Filed on Jan. 7, 2024, as Appl. No. 18/406,210.
Claims priority of application No. 202320139891.3 (CN), filed on Feb. 1, 2023.
Prior Publication US 2024/0253869 A1, Aug. 1, 2024
Int. Cl. B65D 43/06 (2006.01); B65D 43/02 (2006.01); D21J 3/00 (2006.01)
CPC B65D 43/065 (2013.01) [B65D 43/0208 (2013.01); D21J 3/00 (2013.01); B65D 2543/00092 (2013.01); B65D 2543/00305 (2013.01); B65D 2543/00351 (2013.01); B65D 2543/0049 (2013.01); B65D 2543/00537 (2013.01); B65D 2543/00555 (2013.01); B65D 2543/00629 (2013.01); B65D 2543/00685 (2013.01); B65D 2543/00731 (2013.01); B65D 2543/00796 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A pulp-molded cup lid with a leakproof structure, which is integrally shaped by a closed match manner between two coupled male and female moulds associated with a wet plant-fiber pulp-molding technique, comprising:
a central dominating portion upwardly extended from a bottom side of the pulp-molded cup lid;
an annularly peaked saddle formed, along an outer perimeter of the pulp-molded cup lid, with two opposing lateral sides both which jointly define an annularly slotted groove concaved downwardly therebetween and inside the annularly peaked saddle, to be nested over an annular roll side of a cup body, wherein the two opposing lateral sides includes a first lateral side downwardly extending to form a skirt wall where an inner wall surface thereof has an annular hook protruding toward inside the annularly slotted groove, and a second lateral side downwardly extending; and
an annularly caved channel, concaved upwardly between both the annularly peaked saddle and the central dominating portion, forming an upward-bent bottom with a connecting side connected to the second lateral side, wherein:
the upward-bent bottom of the annularly caved channel, the annular hook, and a bulger formed within the annularly peaked saddle jointly constitute the leakproof structure, and the three of the connecting side of the upward-bent bottom, the annular hook, and the bulger jointly define a movement-restricting space within the annularly slotted groove, and the movement-restricting space has a vertical axis extended toward a peak of the annularly peaked saddle, and a horizontal axis extended toward the skirt wall, both which perpendicularly intersect to make the movement-restricting space forming several different standard position angles all starting at a right side of the intersected horizontal axis, and after the annular roll side of the cup body is inserted and accommodated within the annularly slotted groove, the three of the upward-bent bottom, the annular hook and the bulger, which are located respectively at the several different standard position angles, jointly clamp the annular roll side within the annularly slotted groove, in a manner to make the annular roll side being tightly snapped-on, water-sealed and movement-restricted within the movement-restricting space, toward a way of preventing a fluid, stored within the cup body, from spillover, wherein the standard position angle where the bulger is located is an acute angle.