Abstract: The present invention relates to a variable length vertically stacked nested waveguide device, comprising a series of, N, waveguide components. Each waveguide component comprises a waveguide layer comprising a waveguide opening, a recess layer comprising a recess, a conductive material coating. The waveguide components are nested within each other to create a nested structure with a combined waveguide opening length defined by the total length of the wave-guide openings in each waveguide components.

Abstract: A system for three-dimensional printing is disclosed. The system comprises: a rotary tray configured to rotate about a vertical axis; a printing head, each having a plurality of separated nozzles; and a controller configured for controlling the inkjet printing head to dispense, during the rotation, droplets of building material in layers, such as to print a three-dimensional object on the tray.

Abstract: The present invention relates to processes and apparatus for improving municipal waste treatment in autoclave processes. Improvements relate to the use of air-waste stream treatment, indirect heating with thermal fluid, forced steam transfer, autoclave design, waste treatment of contaminated air,classifiers for better separation of fibres from glass or grit and processing. The improvements allow more efficient, safer and environmentally friendly processing, and better end products.

Abstract: A clip assembly (57) retains a ring structure (35) which contains a plurality of individual color coded rings (7). A hand held tool (3), such as a dental instrument having a shaft (6) may be marked with a colored ring (7) by inserting the shaft (6) through the aperture (64) of the ring and separating the ring from the structure (35) by a twisting or pulling motion. The clip assembly (57) and the structure (35) are protected from contamination by transparent covers (65, 66). A stand (67) may be used to retain the clip assembly prior to and after use, with or without the presence of the covers (65. 66). The stand can also retain a tape dispenser (68) which contains colored tape (31) as may be needed for marking instruments that are not suitable for labeling with a ring (7).