Abstract: Pigmented ink formulations of different colors, for use in ink jet printers, are optimized with respect to print quality, by the choice of pigments, by controlling the physical characteristics of each pigment dispersion, and by following a particular sequence of manufacturing steps. Controlling surface tension renders the inks compatible with one another; controlling particle size distribution provides flowability; and pigment selection provides resistance to fading.

Abstract: An adjustable conveyor for use in the manufacture of printed circuit boards to interconnect workstations separated by varying distances, which has a pair of longitudinally extensible belts for edge supporting such circuit boards, with a tensioning adjustment on each belt, and which has a lateral adjustment to accommodate circuit boards of different widths as well as to perform other operations.

Abstract: A continuous ink refill system for ink-jet printers, of the kind employing a disposable ink cartridge, wherein an aqueous suspension of a pigmented ink is continually circulated through the cartridge by means of a pressure pump, with unused ink being returned from the cartridge to an ink reservoir.

Abstract: A method for manipulating collapsable boxes which involves the use of a combination of lateral pressure and gravity to fold or collapse the box and to store it in a desired location.

Abstract: A system for improving the efficiency of the cooling system for a compressor for air or other compressible gas, involving the use of the condensate produced by the compression, which is presented for evaporation at the point of entry of the stream of coolant gas into heat exchangers, whereby the heat required for evaporation of the condensate is taken from such coolant gas to precool the same before it enters the heat exchanger.

Abstract: A vent for relieving pressure in a sewage collection system for buildings characterized by a buoyant float-closure which will easily open in response to fluid pressure to permit escape of gas or liquid from the system upon the build-up in the system of minimum pressure in excess of atmospheric pressure. The float closure is mounted in a threaded plug which is adapted to replace the conventional clean-out plug on the exterior of the building.

Abstract: A golf ball retriever having in combination a rake and an open-ended frusto conical tube having at least one outer opening larger than the diameter of a golf ball, and a smaller inner diameter which is large enough to allow a golf ball to be carried in the tube; with the rake having four tines connected perpendicularly to a pivoting axis and extending beyond the larger outer opening in an arcuate configuration around and parallel to the axis of the tube. The tines are pivotable into an operative or inoperative position around the pivoting axis which is perpendicular to the axes of both the tube and the handle, and are spaced less than a golf ball diameter both from the axis of the tube and from each other.

Abstract: A junction box for extension cords which serves to secure the point at which extension cords are joined together in order to prevent access to such juncture and protect against an electric shock.