Abstract: The crush properties of honeycomb are modified and controlled by providing crush control surfaces at the intersections of the honeycomb cell wall. The crush control surfaces form openings through the cell walls at the intersections which provide a reduction in crush strength of the honeycomb cell. A wide variety of crush properties for a given honeycomb may be accurately achieved by varying the size, shape, number and location of the crush control surfaces within the honeycomb.

Abstract: Resins which are a combination of phenolic and polyamide polymers are used as dipping resins to coat composite honeycomb structures. The phenolic/polyamide dipping resins increase the heat formability of composite honeycomb structures. The dip resin forms a coating on the honeycomb which includes from 30 to 95 weight percent phenolic resin and 5 to 30 weight percent polyamide resin. The dip resin is especially useful for coating composite honeycomb cores made from graphite or glass fibers impregnated with flexible phenolic resins.

Abstract: Heavy density honeycomb structures which include alternating layers of primary corrugated sheets and bisector sheets which are bonded together. The primary corrugated sheets are offset so that the bisector sheets are bonded to the corrugated sheet nodes so that the upper and lower bonding locations on each bisector sheet are displaced from each other. This displacement provides flexibility regions in the bisector sheets which enhance the formability of the heavy density honeycomb. The displaced node configuration is useful for enhancing thermal formability of both metallic and non-metallic honeycomb structures. The offset configuration is used with both substantially flat bisector sheets and corrugated bisector sheets.

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: A crash pad for use in vehicle interiors. The crash pad includes an energy-absorbing honeycomb which has a cover plate attached thereon to prevent noise from being generated due to contact between the crash pad and vehicle interior surface during normal vehicle operation. The cover plate is attached on one side to the honeycomb with the other side being molded to match the shape of the interior surface of the vehicle. The cover plate includes positioning devices which locate and hold the crash pad during interior panel fabrication. The cover plate protects the honeycomb and the technician during handling and installation. The cover plate also helps to retain the shape of the honeycomb and provides a suitable surface for labels that may contain product identification and other information needed during use of the pads in mass production of vehicles.

Abstract: A polymer-based blend which may be cured to form a non-cementious concrete-like material. The polymer-based blend includes 90 to 100 parts by weight low viscosity epoxy resin, 1 to 10 parts by weight of an aliphatic glycidyl ether epoxy diluent, 40 to 50 parts by weight polyoxy-propyleneamine curing agent, 30 to 100 parts by weight intumescent powder, 90 to 110 parts by weight hollow ceramic microspheres having a density of between 0.30 and 0.60 grams per cubic centimeter and 0.01 to 0.10 part by weight air release agent. The hollow ceramic microspheres are dispersed uniformly throughout the polymer-based blend to provide a non-cementious material which, upon curing, becomes a concrete-like material. The non-cementious concrete-like material is well-suited for use as a substitute for concrete and may be used alone or in combination with reinforcing materials.

Abstract: A solution of phenolic and polyamide polymers is used as a dipping resin to coat composite honeycomb structures. The phenolic/polyamide dipping resin increases the heat formability and strength of composite honeycomb structures. The coating formed by the resin includes from 30 to 95 weight percent phenolic resin and 5 to 30 weight percent polyamide resin.

Abstract: Flexible honeycomb panels are vented by providing vent openings at specific locations within the honeycomb core. The invention is applicable to flexible honeycomb panels which are made from bonded corrugated sheets wherein each of the corrugated sheets has upper and lower node ridges and wherein the lower surfaces of lower node ridges are bonded to the upper surface of lower node ridges located on underlying sheets. The corrugated sheets are stacked so that the adhesive or bond lines between the lower nodes are displaced from each other within the stack. Vent openings are located in the upper node ridges to provide venting of the honeycomb structure. Location of vent openings in the upper node ridges can be controlled to provide selective transport of media through the honeycomb.

Abstract: A guide wire dispenser which is used to introduce a guide wire into the body using one hand. The dispenser utilizes a trigger grip configuration which is arranged in combination with a thumb access platform to provide accurate single-handed control of guide wire delivery to the body. A dual trigger configuration is also disclosed which provides the capability to dispense a guide wire from two different nozzles in a single device.

Abstract: A double lumen tubing which is adapted for use as a catheter. Both lumens of the double lumen tubing have equal cross-sectional areas to provide equivalent flow volumes through each lumen. The lumen wall which divides the outer tubular wall into the two lumens has a central arcuate portion which is shaped to allow insertion of relatively large guidewires through the lumen while at the same time maintaining equivalent cross-sectional areas for each lumen. Resistance to kinking is increased by varying external diameters of each lumen to increase the wall thickness of the tubing in selected areas and by varying the thickness of the wall that divides both lumens at the two joints where the wall meets the tubular wall.

Abstract: A process and system for simultaneously cooling shale ash fines and flue gas produced during the combustion of spent shale. The flue gas and fine solids are introduced into a heat exchange zone for contact with conventional heat exchange tubes. Heat transfer particles are introduced into the heat exchange zone for mixing with the flue gas to provide increased heat transfer rates between the flue gas and heat exchange equipment. The heat transfer solids are also of a sufficient size to provide continual scrubbing of the heat exchanger surfaces to prevent the build up of an insulating layer of fine dust particles. A staged cooling system and process is also disclosed.

Abstract: An improved process and system for drying moist particulate carbonaceous materials. The invention has particular application to staged drying processes wherein the particulate material is entrained in one or more serially connect hot gas streams having a temperature above the degradation point of the carbonaceous material. The improvement includes providing contactors between the stages which intimately mix and contact the variously sized particles resulting in partial cooling of the smaller hot and dry particles and partial heating of the larger cool and relatively moist particles. The contactor may be provided by a rotating drum, moving bed, fixed bed or fluidized bed. The contactors prevent overheating of small particles during moisture removal and reduce hydrocarbon loss from small particle devolatilization.

Abstract: Pyrolysis process and system for recovering product gases and liquids from solid carbonaceous particles.Dual stage fluidized bed retort is disclosed having frusto-conical stages serially connected to promote uniform pyrolysis. Product gases and oil are removed from final fluid bed stage in series. Process includes various energy efficient aspects involving recycle of dilute phase combusted solids as the heat carrier, heavy oil recycle and use of steam and/or product vapors as the source of fluidizing gas for the staged retort.

Abstract: A dual stage combustion system and process for achieving high fuel combustion efficiency and reduced nitric oxide emissions. Combustion is carried out in two stages. A first partial combustion carried out in an oxygen deficient atmosphere followed by a second complete carbon combustion in an oxidizing atmosphere. The second combustion step achieves complete fuel utilization, but generates a nitrogen oxide containing flue gas. The nitrogen oxide containing flue gas is passed to the first combustion step where it is removed by interaction with the partially combusted solids.