Abstract: A porous article of manufacture (a sealing material) which comprises sintered hydroxyalkylcellulose, for example, sintered hydroxypropylcellulose, or a sealing material which is capable of being formed into a porous article in the form of a filter and which is made by heating at least one gelling agent that has carboxyl functionality and at least one gelling agent that has hydroxyl functionality, preferably carboxylmethylcellulose (CMC) and hydroxypropylcellulose (HPC) respectively, and a method for preparing the same from a powdery admixture thereof, and a pipette which includes the sealing material in the form of a filter, and also including embodiments of a bilayer filter and of a trilayer filter, each of which comprises a composite of a filter of the present invention and a filter comprising porous sintered polyethylene, preferably ultra high-molecular weight polyethylene.

Abstract: A bicycle rim constructed from a fiber reinforcement impregnated with a resinous material to provide stiffness, strength, is light in weight and presents minimal aerodynamic drag. The rim is constructed from two semi-circular rim sections that are each formed from glass, carbon, or boron fibers that are applied at distinctive crossing angles as layers or “plys”, receive an epoxy thermoset resin or a nylon thermoplastic resin, and are cured in a mold cavity. A pair of rim half sections are matched and are coupled together at their ends into a circle by telescoping aligned ends of each of the rim half sections over inner inserts that an epoxy structural adhesive has been applied to, and the joined rim section ends receive a gusset fitted and bonded along the rim half section end junctions, and with the finished rim drilled appropriately. to receive and mount spoke ends.

Abstract: A composite bicycle tire rim constructed from layers or plys of a fiber reinforcement, preferably fiber glass, to provide a rim that has a weight that is comparable to an aluminum rim and as is strong as a steel rim. The composite rim is continuous, is formed as a hooked bead type rim to have inwardly pointing side wall hook ends that are for fitting into grooves formed in a tire side walls, mounting the tire thereto. The rim is formed on a circular mandrel by laying up groups of plys thereon, with four (4) plys of fiber glass laid up for each group. In which laying up, a first ply of the four plys is fitted onto the mandrel to where its fiber angle is parallel to the mold mandrel circumference, with a following ply laid thereon at a selected positive angle to a vertical axis, and a next ply is laid thereon at a negative angle to the vertical axis, and with a final ply of each group laid thereon to have its fibers perpendicular to a tangent to the mold circumference.