Abstract: The invention relates to a cover (1) for closing a can that is equipped with an internal, radially peripheral rim, whereby said cover comprises at least two rotary cam (7) levers (2, 3), spring-loaded (4), and axially movable by so-called complementary surfaces (8; 10, 11, 12), respectively borne by the cover (1) and the cam lever (2, 3), working together during the driving in rotation of the levers (2, 3) to pass from a closed position of the cover (1), in which the cam (7) rests under the rim of the can, to an open position, in which the cam (7) is released from said rim, whereby the axial movement of the lever (2, 3) in the direction in which the cam (7) is removed from the cover (1) causes a compression of the spring (4). This cover is characterized in that the complementary surfaces (8; 10, 11, 12) are shaped to have at least one zone (8; 10) of less stress on the spring (4) corresponding to the open position of the cover (1) for the purpose of preventing any premature wear on the spring (4).

Abstract: The lid with cams for closing a pot or paint etc. has an underside provided with a seal to be clamped against an edge of a rim of the pot by pivoting the cams on the underside of the lid with levers placed on the top side of the lid. At least the rim is coated inside with a friction-sensitive, corrosion-protective material. Each of the cams is connected to the respective lever with a spindle. A spring biases this spindle, and thus the cam, in an upward direction. Each cam is maintained at a distance from the bearing surface of the rim in every positions of the cam except a position in which the cam extends outwardly from the lid (closing position) so as to protect the friction-sensitive corrosion-protective coating of the rim from abrasion.

Abstract: The stirrer lid device is provided with a stirring device carried by a driving shaft extending through the lid via a sleeve. The lid has an underneath portion which defines a groove for a flat and annular sealing gasket having a width selected for compensating manufacturing tolerances between pots various origins. The lid cooperates with means imparting a uniform pressure on the sealing gasket.