Abstract: There is disclosed a porous, vacuum formed filter tube having randomly oriented glass fibers and having at least one layer of a suitable sheet material wrapped around said porous filter tube and being in intimate contact therewith, said disclosed combination having an outer support structure of a predetermined inside diameter sufficient to compress the assembly of said porous filter tube and said material when it is slipped thereover, thus providing compression from the outside to the inside and forcing the layer of sheet material into intimate contact at virtually all points with said porous filter tube.

Abstract: There is disclosed a method of making porous, vacuum formed filter tube having randomly oriented glass fibers and having at least one layer of a suitable sheet material wrapped around said porous filter tube and being in intimate contact therewith, said disclosed combination having an outer support structure of a predetermined inside diameter sufficient to compress the assembly of said porous filter tube and said sheet material when it is slipped thereover, thus providing compression from the outside to the inside and forcing the layer of sheet material into intimate contact at vertually all points with said porous filter tube.

Abstract: An adsorption filter is provided by a tank which contains an adsorbent material that is capable of removing impurities from a fluid stream. Filtering may be done by the mass transfer zone principle of adsorption. The tank is formed with an elongated outer shell which is closed at one end and open at the other. An elongated core with an open upper end and a fluid opening at its lower end is centered in the open shell by a funnel that has a centrally located rod and a conical outer wall that contacts the top of the shell adjacent its open end which allows adsorbent material to be poured into the space between the shell and the core. The length of the shell is preferably at least two times as long as the mass transfer zone of the adsorbent material while the fluid opening at the lower end of the core is preferably on the order of three fourths as long as the mass transfer zone. A cap that has a port in fluid communication with the space between the shell and the core is formed by a ring of screened apertures.

Abstract: An adsorption filter is provided by a tank which contains an adsorbent material that is capable of removing impurities from a fluid stream. Filtering may be done by the mass transfer zone principle of adsorption. The tank is formed with an elongated outer shell which is closed at one end and open at the other. An elongated core with an open upper end and a fluid opening at its lower end is centered in the open shell by a funnel that has a centrally located rod and a conical outer wall that contacts the top of the shell adjacent its open end which allows adsorbent material to be poured into the space between the shell and the core. The length of the shell is preferably at least two times as long as the mass transfer zone of the adsorbent material while the fluid opening at the lower end of the core is preferably on the order of three fourths as long as the mass transfer zone. A cap that has a port in fluid communication with the space between the shell and the core is formed by a ring of screened apertures.