Abstract: Convertible trays are disclosed with features that facilitate preparation, transportation, and presentation of food items. An example convertible tray includes a substrate defining apertures, where each aperture is for holding a food item. The convertible tray also includes a first separation feature (e.g., at least one perforation) defined by the folded substrate on a first side of the convertible tray adjacent to at least one aperture of the apertures. The convertible tray further includes flaps that are foldable to support the first side of the convertible tray above a support surface. The folded substrate can be divided at the at least one perforation, to remove an individual tray that includes the at least one aperture adjacent to the perforation. The individual tray can be inserted into a serving container while holding the food item.

Abstract: An oil pool in a rotary vane, oil sealed mechanical vacuum pump casing is cooled by air drawn by a relatively low pressure and low speed laminar flow fan mounted on a motor shaft for the pump and positioned in a shroud between end plates for the motor and casing. The air pumped by the fan flows axially relative to the shaft through a horizotally extending slot at the bottom of the shroud and vertically extending slots on the sides of the shroud. The pumped air flows against vertically and horizontally extending fins respectively on the pump casing bottom and sides. The vertically extending fins at the bottom of the casing have bases slightly above the horizontal slot at the bottom of the housing so air flowing through that slot flows against the bases of the fins at a shallow angle. A vertical surface of the housing remote from the fan and the shroud has vertically extending fins that are aligned with the vertically extending fins on the bottom of the casing.