A contactor media for removing waste from water comprising at least two mated discs. Each disc having parallel raised ribs separated by parallel inverted ribs in an alternating rib-inverted rib pattern. Every rib and inverted rib has a series of uniformly spaced apart recesses with the recesses of the ribs located on the side of the disc opposite the recesses of the inverted ribs. The mated discs have the recesses of the inverted ribs of one disc interfitted with the recesses of the ribs of the ...

In photographic elements comprising a reversibly activated photoconductor and incorporating a photographic reducing agent, increased shelf life results from using an N-(carboxy-substituted alkyl) aniline compound containing an amino or hydroxy substituent on the aromatic nucleus as the reducing agent.

Improved air filters of felt carrying electrically charged resinous particles comprise a felt made from a mixture of wool and acrylic fibers.

Filter media suitable for use in the filtration of fluids under substantial pressure are derived from nonwoven fabrics comprising a blend of fibers which have a low volumetric wet swelling index and fibers which have a high volumetric wet swelling index.

A method for identifying or detecting biologically active materials more rapidly and conveniently than standard identification methods involving the use of lyophilized media within microcontainers is disclosed.

A filter media for scrubbers includes a plurality of spherical bodies made of a liquid wettable material shaped in a latticework jacket having a great circular ring from which extend arcuate bars terminating near the poles of the spherical body so formed. Spaced axially extending bars extend from the arcuate bars and terminate within the body at free ends. The arcuate bars have a cross section which tapers inwardly toward the center of the body to provide maximum capture of liquid droplets.

The present invention is a guide for use in combination with a printer which includes a frame and a print head that is mechanically coupled to the frame and that is adapted to travel laterally along the front of the frame. The printer also includes a platen which is mechanically coupled to the frame and which is disposed so that a print medium may travel between the platen and the print head, and a pair of sprockets, each of which has a cylindrical sidewall on which the print medium travels. Eac...

A filter element for use in a filter for pressurized material in flowable form is disclosed. The filter element includes an elongated perforate web adapted to move longitudinally across the flow axis of the material being filtered and to accommodate filtered flow therethrough of the material. A plurality of seal members are fixed to the perforate web transversely to and at spaced intervals along the longitudinal axis thereof. The perforate web extends continuously and uninterruptedly across the ...

An air filter is formed into an accordion-shaped body having reverse folds forming pockets. A plurality of string-like pleat spacing members are provided and with each member being threaded through a plurality of openings in the pocket walls. The openings are smaller in diameter than that of the spacing member when it is in a relaxed condition to provide a friction force fixedly holding the pocket walls in place along the member.

Improved diagnostic media for isolating, identifying, and classifying Enterobacteriaceae comprise an effective amount of isopropyl-beta-D-thiogalactopyranoside in order to reduce the incidence of false lactose negative determinations and to differentiate between lac inducible and lac constitutive bacteria.