Abstract: A pie crust dough roll out and trimming mold assembly includes a flat base element having a roll out surface thereon and an array of apertures therein for accommodating various size ring mold elements and for preventing their slippage relative to the base by cooperating with protuberances extending from the bottom surfaces of the rings. The ring elements have narrow top surface areas for pinching off excess pie crust dough during the rolling out process, while having wide bottom surfaces for strength and stability. An inclined, downwardly sloping surface connects the narrow top surface area and the outside diameter of the ring elements. The ring elements include internal diameter walls that correspond in height to the desired thickness of the pie crust disc, the internal diameter of the rings corresponding to the external diameters of the desired pie crust discs.

Abstract: A candle mold is described having a barrel open at each end, with a plate in sealing contact with one end removably held thereto by a flexible end cap which fits over the barrel and plate forming a mold into which wax can be formed. The end cap has a centrally located hole for engagement of a wick which passes therethrough and through a centrally located hole in the plate to the end of the barrel where it may be retained by a wick holder.

Abstract: An expansible mold for the fabrication of plaster parts having reliefs in the side walls comprising at least two walls and non-compressible deformable parts between two parallel side edges of the walls in which, under pressure, the deformable parts acquire the profile to be imparted to the molded plaster part, and which retract from the molded plaster part upon release of pressure to enable removal of the molded part without loss of a tight sealing relation with the mold.

Abstract: The specification discloses a food packaging machine including a continuous conveyor which passes a plurality of filling and packaging stations. A plurality of die housings are connected to the conveyor. Two upstanding retaining projections are spaced apart in the bottom of each of the die housings. A pair of die fillers are dimensioned to be retained in each of the die housings and each includes an upper cavity for receiving a food product to be packaged. A rigid plate is disposed over a recess in the bottom of each of the die fillers and includes a keyhole-shaped aperture therein. A first portion of the aperture is dimensioned to receive one of the retaining projections when the die filler is positioned in a die housing. A second portion of the aperture is narrower than the first portion in order to receive the retaining projection when the die filler is slid relative to the die housing, in order to lock the die filler to the retaining projection.

Abstract: Apparatus for finish casting of bifocal ophthalmic lenses from plastic material is described. No further surface grinding or polishing of the lens is required. The portion of the bifocal segment of the lens may be adjusted to any desired location relative to the optical center of the distance field of the lens. The apparatus comprises a power mold having a predetermined spherical or sphero-cylindrical surface, a bifocal mold having a predetermined optical curvature with a bifocal segment having a different optical curvature countersunk in the face thereof, and an annular gasket coupling the power and bifocal molds. The bifocal segment is adjusted relative to the optical center of the cast lens by use of a wedge member. An illustrative calculation to determine placement and thickness of the wedge for a given ophthalmic prescription is set forth.

Abstract: A method of making mold assemblies in which are cast polymerized synthetic resin, single vision and multi-focal plastic ophthalmic lenses. Molds are used to produce optical surfaces on the cast resin lenses. These are of glass which is optically surfaced and then assembled within a resilient carrier and supported frictionally in sealed engagement with the tubular resilient walls of the mold assembly carrier. The carrier is designed to provide for positioning the mold elements dimensionally so as to control concentricity, thickness and prism of the finished casting with no portion of the body of the carrier interlying the glass mold elements. Unrestricted shrinkage therefore is allowed to take place in thickness so as to allow full curing of the lens without premature mold separation. The mold assembly is sealed to provide a hermetic closure against leakage of contents or intrusion of air into the mold assembly during curing.