| 摘要 |
FIELD: technological processes. ^ SUBSTANCE: invention is related to lids for containers, in particular, vacuum containers for storage of food products, and is aimed at improvement of lid closing tightness. Tank cover represents the surface with salience directed to the top, has vacuum valve and cavity directed inside the tank. Cavity has elliptical contour and spherical projection directed upwards with cylindrical deepening with opening for installation of valve with head, acting from discharge. Valve head is arranged in the form of round plate and has edge of triangular shape that interacts with valve gasket, and is freely installed in the opening with the help of bushing that ends with flange arranged with radially distanced ribs. ^ EFFECT: better tightness of lid closing. ^ 3 cl, 4 dwg |
