Abstract: A thin absorbent undergarment liner is provided which exhibits a clear, aesthetically pleasing embossed pattern on the body facing surface thereof while still maintaining the longitudinal edges soft and comfortable. The liner is provided to have areas of deep depressions on the body facing surface and shallow impressions on the longitudinal edges.

Abstract: A wrapper sleeve is made from a film length in the following consecutive steps: wrapping the film length about a sealing mandrel such that opposite longitudinal edge zones of the film length are in a face-to-face oriented relationship; providing a sealing seam in and along the face-to-face oriented longitudinal edge zones for bonding the edge zones to one another whereby a wrapper sleeve is formed; and removing the wrapper sleeve from the sealing mandrel and inserting the wrapper sleeve on a forming mandrel having a circumferential length identical to that of the sealing mandrel and a cross-sectional shape different from that of the sealing mandrel.

Abstract: A tennis-ball is made by covering a spherical core with twelve substantially identical pentagonally-shaped pieces of a cover material. Before the pentagonally-shaped pieces are attached to the core, they are covered on their outermost surface by a removable layer of adhesive-impermeable barrier material (e.g. tissue paper). The barrier material restrains the movement of the pentagonally-shaped pieces when applied to the spherical core, so that a narrow uniform seam is obtained. When all twelve cover pieces are correctly positioned on the core, the barrier material is removed and the assembly subjected to a random rolling action to "finish" the ball.

Abstract: A process for producing a non-woven fabric of hot-melt-adhered composite fibers having a high strength in a small weight thereof and soft feeling is provided, which process comprises forming a web of fiber aggregate consisting of sheath and core type composite fibers alone composed of a first (core) component of a fiber-formable polymer and a second (sheath) component of one kind or more of polymers having a m.p.(s) lower than that of the first by 30.degree. C. or more and also having a specified average thickness, or mixed fibers of the composite fibers with other fibers containing the composite fibers in a specified amount; and heat-treating the web at a temperature lower than the m.p. of the first component and equal to or lower than that of the second, and affords to the second, a specified apparent viscosity as measured at a specified rate to thereby stabilize the form of the web by hot-melt-adhesion of the second.

Abstract: In acoustic panels employing a layer of perforate metal adhesively bonded to a layer of porous fibrous metal of a different type with the perforations of the perforated layer and the pores of the porous fibrous layers open to communication therethrough and the layers being isolated therebetween. The isolation between the layers is maintained by applying a coating of liquid epoxy resin material to selected locations, curing the epoxy coating, cutting or drilling the layers as required, and recoating the cut or drilled areas with a second coating of liquid epoxy resin.

Abstract: In acoustic panels employing a layer of perforate metal adhesively bonded to a layer of porous fibrous metal of a different type with the perforations of the perforated layer and the pores of the porous fibrous layer open to communication therethrough and the layers being isolated therebetween. The isolation between the layers is maintained by applying a coating of liquid epoxy resin material to selected locations, curing the epoxy coating, cutting or drilling the layers as required, and recoating the cut or drilled areas with a second coating of liquid epoxy resin.

Abstract: A rotatable processing bowl assembly adapted for mounting in a centrifuge includes an umbilical tubing system formed of a plurality of individual flexible tubes each of which communicates with the processing bowl. Each tube has an exterior wall and includes a first portion extending adjacently from the bowl and a second portion which is spaced from the bowl. The exterior walls of the tubes are bonded together along their first portions so that the joined exterior walls collectively define the outer periphery of the tubing system along the first portions of the tubes. Preferably, the tubes are also wound to form a predetermined helical pattern along their first portions. This arrangement enhances the tubing system's durability and resistance to fatigue along the bonded together first portions, particularly at higher rotational speeds, and permits direct, facile connection of the free and unattached second portions with external apparatus.

Abstract: A strength member is paid off from a neutralizer payoff in such a manner that the strength member is rotating. A tape having longitudinal grooves is paid off from a fixed payoff and passed through a forming die. The strength member is also passed through the forming die, and the tape is there applied to the exterior of the strength member. As a result of the rotation of the strength member, the tape obtains a helical lay about the strength member. An optical fiber is paid off from a neutralizer payoff and laid into a groove on said tape. An outer tape may be helically laid over the corrugated tape and a filling compound may be applied under and over the grooves of the corrugated tape. A binder may be provided to secure the outer tape over the fiber.