Abstract: A press includes a fixed platen, a vertically movable platen and a double toggle actuating mechanism for raising and lowering the movable platen. A piston cylinder breaks one of the toggle mechanisms, which in turn breaks the second toggle mechanism to raise the platen. A balance mechanism is operatively connected to the movable platen and assists in raising the movable platen and supporting the same in its raised position. A cut piston cylinder is connected to one of the toggle mechanisms.

Abstract: A rectangular container cover includes sidewalls having an intermediate, horizontally extending ledge and downwardly depending end segment shaped to fit over a peripheral rim of a container such that the horizontal ledge is in abutment with the container lip. The cover is made of a flexible material with detents provided for releasably attaching the cover to a container near each of the corners. The corners of the cover have a radius of curvature greater than the radius of curvature of the container on which the cover is adapted to fit such that when positioned on the container, the sides of the cover are in tension and snugly fit against the associated container.

Abstract: Mold apparatus for vacuum forming sheet material, especially sheet plastic, including withdrawable projections which project into the mold cavities to form depressions or projections in the resulting molded item and are withdrawable to allow removal of the molded item. Sealing means, such as an "O" ring, on each projection, are included to prevent loss of vacuum through the mold walls around the projections. Counter-rotational camming means are provided for simultaneously projecting or withdrawing a plurality of the said projections either on one mold or on adjacent molds.