Container Closure For Vented Pouring Through A Curved Aperture

A closure (20, 20A) for a container that has an opening to the container interior wherein contents may be stored, said closure (20, 20A) comprising:

• (A) a body (30, 30A) that is either (a) a separate structure for being attached to said container at said opening, or (b) a structure formed as a unitary portion of said container at said opening, and wherein
• said closure body (30, 30A) has a deck (40) defining (i) at least one pour aperture (50) that can communicate with said container opening and that can accommodate pouring out of the contents through said at least one pour aperture (50) wherein said at least one pour aperture (50) has a curved configuration extending laterally on each side of a central axis line (A) that bisects said closure body (30), and (ii) at least one vent aperture (60) that can communicate with said container opening and that can accommodate the in-venting of ambient atmosphere through said at least one vent aperture (60) into said container, and
• said closure body (30, 30A) has a pour spout (70) projecting outwardly from said deck (40) and extending at least partway around said at least one pour aperture (50);
• and
• (B) a lid (32, 32A) for accommodating movement relative to said closure body (30, 30A) between (a) a closed position sealing against said closure body (30, 30A) to prevent flow of the contents outwardly of said closure body (30, 30A), and (b) an open position permitting flow of the contents outwardly of said closure body (30, 30A);
• wherein said closure (20, 20A) is characterized in that
• said at least one vent aperture (60)
• (i) has a cross-sectional flow area as measured at said deck (40);
• and
• (ii) is further defined by a vent tube (62) which projects downwardly from said deck (40) to define a vent path length from the top of said one vent aperture (60) to the bottom of said vent tube (62) wherein the ratio of said path length to said cross-sectional flow area is between about 1.0 and 2.0.