Abstract: A packaging tray and, more particularly a high-strength, reinforced molded food packaging tray for use in packaging meats, fish, poultry and other comestibles which is adapted to be utilized in conjunction with a transparent overwrap film. The inventive packaging tray is provided with a novel peripheral lip structure which will aid in preventing the collapse or fracture of the tray sidewalls in view of pressures exerted by the overwrap film when applied to the tray in an automatic tray overwrap machine. In a particularly preferred embodiment of the invention, the packaging tray is provided with a novel tray bottom wall incorporating a reinforcing structure in the form of one or more strengthening ribs which are integrated in the bottom wall of the tray.

Abstract: Disclosed is a packaging tray having a bottom construction which contains molded cells shaped and dimensioned to hold liquids by capillary action. The cells capture and retain liquids and prevent their free flow about the tray bottom. The bottom preferably also contains at least one upstanding raised area for holding foodstuffs away from the cells to prevent the foodstuff from breaking the surface tension of liquids retained in the cells, thus helping to ensure retention of liquids by the cells.

Abstract: Disclosed is a packing tray having an improved rib reinforcement. At least one tapered rib extends along the bottom of the tray from a longitudinal centerline portion toward opposing sidewalls. The rib cross-section progressively decreases from the centerline portion toward the terminating end of the rib. The tapered rib provides tray reinforcement where it is most needed while minimizing intrusion into available packaging volume.

Abstract: A method and an apparatus for measuring and controlling foam sheet blow-up in a thermoformer oven. Control of the oven operation is achieved through monitoring the measured blow-up of a material which being heated in the thermoformer oven in order to regulate the thickness of the plastic material prior to its conveyance into a molding or forming station.

Abstract: A molded food packaging tray for use in packaging meats, fish, poultry and other comestibles in conjunction with a transparent overwrap film. The inventive packaging tray is provided with a novel peripheral lip structure which will aid in preventing the collapse or fracture of the tray side walls in view of pressures exerted by the overwrap film when applied to the tray in an automatic tray overwrap machine.