| 摘要 |
A closure (16) has channels (45) for washing food particles out of a spiral space (30) between the threads (13, 28) when the closure is sealed on a container. In a composite closure embodiment, a disk (32) is received beneath a top (22) of an annular shell (18). Channels (45) on the lip undersurface extend from the lip inner edge (23) outwardly past the disk outer edge (40). a stop (49) on the underside of the lip directly above the container rim (24) prevents the channels from being closed, as by overtightening. The channels extend outwardly past the stop and communicate with the interthread space which in turn communicates with an outlet (48). A jet directed onto the disk flows through the channels over the edge of the disk and downwardly through the interthread space, to the outlet. |
