Abstract: Method for the production of kraft paper for increasing its functional quality, particularly its tensile energy absorption, whereby the pulp being prepared in a conventional manner is processed by additional separate curlation directly before web formation for increasing the elastic stretch and a paper bag made of that kraft paper wherein the elastic stretch exceeds 1.8%.

Abstract: A self-supporting tubular fibrous filter element consists of elongated fibers compacted in a direction parallel to the central axis of said tubular element to have a substantially constant density throughout the length and thickness of the tube with a majority of the fibers in parallel to one another in a circumferential direction about the said axis. When required, a perforated cylindrical support sheet is molded into at least one cylindrical face of the element.

Abstract: An inexpensive, disposable, three-dimensionally contoured container, suitable for many purposes including holding food during exposure to high temperatures for long times in either a microwave or a conventional oven without any detrimental effect to the container or the food. The container consists of an essentially impervious liner of polyethylene terephthalate directly bonded by its own substance to a pre-formed contoured base obtained by molding to final shape nonbrowning substantially 100% bleached kraft wood pulp from an aqueous slurry thereof against an open-face suction mold, and drying the same under pressure imposed by a mating pair of heated dies. The liner is formed by bonding to the pulp base a 0.5-2.0 mil thick film of thermoformable, substantially amorphous, substantially unoriented polyethylene terephthalate having a molecular weight which is understood to be in excess of 15,000.

Abstract: A diaphragm for a speaker obtained by forming a diaphragm base by screen processing a mixture of carbon fiber, pulp and polyvinyl alcohol fiber as a binder in a manner similar to that employed for making paper, depositing a thermosetting resin on the diaphragm base by impregnation or coating, and subjecting the diaphragm base, on which the thermosetting resin has been deposited, to electroless plating to deposit a metal film in the interstices between fibers and on the entire fiber surface.

Abstract: A diaphragm for a speaker which is prepared by heating a conjugated sheet obtained by paper-making polyethylene short fibers with other short fibers which have a high modulus of elasticity, such as carbon fiber, to melt and solidify polyethylene short fibers in the conjugated sheet; the process for the production thereof. The diaphragm for a speaker of the invention has a high modulus of elasticity and a high internal loss and a speaker prepared with such a diaphragm has the advantage of having a wider reproducing frequency response and lower distortion. Furthermore, the process for production of the invention possesses another advantage in that diaphragms for speakers can be produced in a continuous process of successively pressing out the speaker diaphragm with a cold mold press.

Abstract: A nonwoven, self-sustaining, absorbent fabric comprising a batt of randomly arranged, intermingled cellulosic fibers has a plurality of high loft, loosely compacted regions separated from each other by highly compressed regions. An adhesive material penetrates through the compressed regions to form bonded fiber networks extending completely through the batt, and said adhesive material only partially penetrates through said high loft regions whereby the fibers in the interiors of said high loft regions are unbonded by said adhesive so that said regions are highly absorbent. A method of manufacturing the above-described nonwoven fabric by moistening opposed surfaces of a loosely compacted, randomly oriented cellulosic fiber batt, embossing said moistened batt for providing a pattern in said surfaces, applying an adhesive to the patterned surfaces of the batt and setting said adhesive.

Abstract: A molded cellulosic article, such as a loudspeaker cone, is formed without an intermediate drying step by first forming a pre-form having 600 - 900% water on a water pervious wire net, inserting the pre-form directly into a hot press, and drying the pre-form to less than about 5% by weight water in the hot press at a pressure less than about 400 psi and at a temperature of 400.degree. - 450.degree. F.

Abstract: A filter tube, which filter tube comprises a mass of interrelated nonwoven glass fibers, the fibers having a diameter of from about 0.001 to about 10 microns, the fibers bonded at the junctions of the fiber crossovers with a hardened silicone resin bonding agent, the fibers interrelated to form a semirigid mass of desired porosity suitable for use as a filter for gases or liquids.