Abstract: Lid for large containers (12) especially food preparation containers for catering, and of the type, supported by an arm (17), which is rotable around an axle (16). In order to admit the opening of a small slit of the container (12) opening under simultaneous swinging away of the lid (11), the axle (16) is therefore arranged at an acute angle against opening plane of the container (12).

Abstract: A method and an apparatus for mixing both liquid and pastelike substances, especially foods in pots of large kitchens. An upward and downward circulatory motion of the substance is produced by two oppositely rotating mixers (10, 11), which while rotating are raised and lowered through the substance. Each mixer includes blade groups (24-27 and 28-31) with opposite inclinations as viewed in the rotation direction, such that while raising and lowering the mixers layer by layer a part of the substance is lifted mechanically while another part is pressed downward. The apparatus includes of a mobile unit (1) which can be fixed and centered in an exact position relative to the pot (2).