VALVE FOR DISPENSING PRODUCT

摘要

A valve (30, 30A, 30B, 30C, 30D) is provided with a peripheral attachment portion (50, 50A, 50B, 50C) by which the valve may be attached to a dispensing structure (34) through which can be discharged a product from a supply of the product. The valve (30, 30A, 30B, 30C, 30D) includes a flexible, peripheral sleeve (70, 70A) extending from the peripheral attachment portion (50, 50A, 50B, 50C). The sleeve (70, 70A) has a central elongate portion (72, 72A) and two shorter end portions (74, 74A) at opposite ends of the elongate portion (72, 72A) so that the central elongate portion (72, 72A) and the two shorter end portions (74, 74A) together define an interior volume. The valve (30, 30A, 30B, 30C, 30D) also has a flexible, elongate head (90, 90A) extending from the peripheral sleeve (70, 70A). The head (90, 90A) includes at least one elongate slit (100, 100A, 100D) defining two, opposed, elongate, openable regions (101, IO1A) in the head which are normally closed and which open to permit the discharge of the product therethrough in response to a pressure differential across the head.