Abstract: A high performance purified natural zeolite pigment composition for use in papermaking and paper coating is disclosed. Use of the pigment facilitates manufacture of coated ink jet and digital printing papers with improved quality and economics. The novel zeolite pigment composition can also be used as a supplementary pigment to improve the properties of coated paper and paperboard for flexographic and water-based gravure printing. When used as filler, the novel zeolite pigment composition is readily retained and eliminates print-through in uncoated papers. The novel zeolite pigment is low in abrasion and provides improved coefficient of friction. The novel zeolite pigment is also useful as a microparticulate retention aid in papermaking and as an additive to improve the performance of deinking processes.

Abstract: A direction-finding antenna that conforms to flat and semi-flat surfaces is disclosed. It has a low profile in comparison to most existing direction-finding antennas and its surfaces are shaped so that reduced radar reflections and reduced radar cross sections of the antenna assembly are achieved. The antenna assembly has direction-finding characteristics that are essentially equivalent to traditional antennas that have high profiles and that are mounted high and away from external surfaces of platforms for unobstructed views of arriving electromagnetic energy and away from reflected electromagnetic waves and reradiators.