Abstract: Embodiments of the invention are directed to a portable grinding apparatus comprising: a frame; a boring bar operatively coupled to the frame; and a grinding assembly operatively coupled to the boring bar, wherein the grinding assembly is adjustable in one or more axes by adjusting the frame or the grinding assembly for grinding a component secured to the frame.

Abstract: A B-staged molding material comprises discrete fiber pieces embedded in an epoxy resin matrix. The matrix comprises at least one epoxy resin material and at least one further resin material together with at least one B-staging agent.

Abstract: Expanded cellular structures are formed from dense nonporous cellulose paper with an air permeance of less than 30 ml/min which cellular structure is provided with a shape retention of at least 90%. The shape stability is obtained by forming the cellular structure, spraying with an aqueous liquid and heating, the amount of liquid, time and temperature of heating being selected and sufficient to provide the desired shape retention. The minimum amount of water is at least 30 weight % of dry paper more usually at least 75% with minimum heating of 1 minute at 100° C.

Abstract: An improved honeycomb structure formed from a non-woven sheet material coated with a resin which contains particles of a polymeric material. The inclusion of solid polymeric particles in the resin coating was found to increase the strength and stiffness of the honeycomb without degrading compressive properties. Composite panels are also disclosed where the improved honeycomb structure is combined with one or more facing sheets.