Abstract: A rapid prototype tempering process comprises producing a rapid prototype part from a base material, creating voids in the rapid prototype part, and filling the voids with a filler material that changes at least one characteristic of the prototype part. The rapid prototype part may be made, for example, by stereolithography, selective laser sintering (SLS), extrusion, printhead technology, or the like. The base material is generally a brittle material and the filler material may be selected to enhance the durability of the prototype part, for example. Parts made completely from a filler material that is injected into cavities of molds made from a base material are also disclosed.

Abstract: A furniture kit includes several pieces of furniture which can be combined in one way to produce an infant changing table and in another way to produce a desk. The furniture kit includes a table, a drawer, a chest, and an infant changer.

Abstract: A rapid prototype tempering process comprises producing a rapid prototype part from a base material, creating voids in the rapid prototype part, and filling the voids with a filler material that changes at least one characteristic of the prototype part. The rapid prototype part may be made, for example, by stereolithography, selective laser sintering (SLS), extrusion, printhead technology, or the like. The base material is generally a brittle material and the filler material may be selected to enhance the durability of the prototype part, for example. Parts made completely from a filler material that is injected into cavities of molds made from a base material are also disclosed.

Abstract: A furniture kit includes several pieces of furniture which can be combined in one way to produce an infant changing table and in another way to produce a desk. The furniture kit includes a table, a drawer, a chest, and an infant changer.

Abstract: A method and apparatus for determining refrigerant density and mass flow rate, and for pressurizing a refrigerant recovery tank while the refrigeration system is being recharged. The mass of a flowing refrigerant is automatically continually determined by reliable static means in a controlled recharging process. Flow-dependent pressure, such as the pressure drop across the orifice, and temperature data are taken from the recharging system and are connected to a data processor which uses the pressure and temperature data to determine the refrigerant density and the mass of the flowing refrigerant that has been used. The pressure of a source of recharging refrigerant can be maintained by withdrawing and heating liquid refrigerant and returning the resulting superheated vapor directly to the source of recharging refrigerant, and recharging operations can proceed during such pressure maintenance.