Abstract: A dentifrice composition comprising an orally acceptable vehicle having distributed therein a water hydratable film flakes having a matrix comprised of a water soluble hydroxy alkyl cellulose polymer and a starch, and having entrained therein a constituent selected from therapeutic cosmetic and decorative materials.

Abstract: An oral care composition having enhanced oral hygiene and antiplaque properties which comprises an orally acceptable vehicle containing a combination of an enzyme, cetylpyridinium chloride and a reducing agent.

Abstract: A dentifrice composition comprising an orally acceptable vehicle having distributed therein a water hydratable film flakes having a matrix comprised of a water soluble hydroxy alkyl cellulose polymer and a starch, and having entrained therein a constituent selected from therapeutic cosmetic and decorative materials.

Abstract: A modular injection molding machine has an extruder/injector assembly, a carriage assembly for carrying the extruder/injector assembly, a first clamping apparatus for holding an associated first mold, a main frame assembly which supports the first clamping apparatus and, a first adder module assembly. The first adder module assembly is selectively operatively connectable to the main frame assembly and is used to support a second clamping apparatus at any selectable laterally spaced distance. The carriage assembly selectively carries the extruder/injector assembly between the first and second clamping apparatuses.

Abstract: A modular injection molding machine has an extruder/injector assembly, a carriage assembly for carrying the extruder/injector assembly, a first clamping apparatus for holding an associated first mold, a main frame assembly which supports the first clamping apparatus and, a first adder module assembly. The first adder module assembly is selectively operatively connectable to the main frame assembly and is used to support a second clamping apparatus at any selectable laterally spaced distance. The carriage assembly selectively carries the extruder/injector assembly between the first and second clamping apparatuses.

Abstract: A method for preheating particles of carbonaceous fly ash prior to injecting the particles of fly ash into a combustor. In the method, the particles of fly ash are introduced into a preheating vessel. The particles of fly ash are heated in the preheating vessel to a temperature at least approximately equal to their autoignition temperature to form preheated particles of fly ash. The preheated particles of fly ash are then injected into the combustor. The heating of the particles of fly ash in the preheating vessel decreases the amount of time the particles of fly ash are in the combustor below the autoignition temperature and thereby increases the amount of carbon in the particles of fly ash oxidized within the combustor. An apparatus is provided for performing the method of the invention.

Abstract: A method for combusting a fossil material so as to produce an exhaust stream having a low level of pollutants. The fossil material is introduced into a fluidized bed combustor which is operated at a temperature of at least approximately 1775.degree. F. to produce a partially cleansed exhaust stream having a low level of N.sub.2 O. SO.sub.2 is removed from the partially cleansed exhaust stream outside of the fluidized bed combustor to produce a cleansed exhaust stream having a low level of SO.sub.2. An apparatus is provided for performing the method of the invention.

Abstract: A vent ridge assembly for a metal roof includes a pair of adjacent roof sections spaced from one another. Each of the roof sections is constructed of a roof substrate, a batten overlying and extending along a longitudinal edge of the substrate and one or more roofing panels overlying the roof substrate and spaced from the batten. A plate overlying the batten has one longitudinal edge extending along the length of the batten and a second opposing longitudinal edge overlying a roofing panel. A ridge cap overlies the panels of the adjacent roof sections and has first and second coupling flanges receiving the second opposing longitudinal edges of the plates. A corrugated sheet is disposed between the plate and the batten of each roof section for venting air and water vapor from the beneath the roof.

Abstract: A sheet steel cladding roof assembly comprised of a series of side-by-side sheet steel roofing panels of shallow U-shaped cross-section and joined together along their adjacent upstanding side walls by folded over standing seam joints is secured to the roof substrate continuously along each of the standing seam joints by a two-part continuously extending cleat arrangement comprising an anchor member fixedly secured to the roof substrate underneath one of the jointed roof panels and a slide member clamped in the standing seam joint and having a longitudinal upstanding sliding lap seam expansion connection with the anchor member permitting longitudinal sliding movement of the slide member and its associated roofing panels relative to the anchor member to accommodate thermal longitudinal expansion and contraction of the elongated jointed roofing panels.

Abstract: An improved method and apparatus is disclosed for a roofing system which uses an improved standing seam joint such that the roofing system can be used for flat roof applications. A standing seam is conventionally formed and then compressed in a press fit manner by compression apparatus. Provisions are made to apply a gasket material to the compressed sections of the standing seam prior to compression which material is deformed when the seam is compressed to provide a sealed joint which is significantly stronger than the conventional standing seam.

Abstract: A lap joint structure for adjoining panels of a sheet metal roofing assembly permits shifting of the joint panels longitudinally and transversely with respect to the joint as caused by thermally induced expansion and contraction, as well as providing a securely anchored connection of the panels to the roof structure. Two adjacent panels are rigidly connected to one another, an underlying cleat is rigidly connected to the roof substrate, and the two joined panels are securely connected to the cleat with clearance allowed for thermally induced movements of the panels across the substrate.

Abstract: A lap joint structure for adjoining panels of a sheet metal roofing assembly permits shifting of the joint panels longitudinally and transversely with respect to the joint as caused by thermally induced expansion and contraction, as well as providing a securely anchored connection of the panels to the roof substrate. Two adjacent panels are rigidly connected to one another, an underlying cleat is rigidly connected to the roof substrate, and the two joined panels are securely connected to the cleat with clearance allowed for thermally induced movements of the panels across the substrate.

Abstract: A linear accelerator system includes a plurality of post-coupled drift-tubes wherein each post coupler is bistably positionable to either of two positions which result in different field distributions. With binary control over a plurality of post couplers, a significant accumlative effect in the resulting field distribution is achieved yielding a variable-energy drift-tube linear accelerator.

Abstract: A free electron laser and free electron laser amplifier using beam transport devices for guiding an electron beam to a wiggler of a free electron laser and returning the electron beam to decelerating cavities disposed adjacent to the accelerating cavities of the free electron laser. Rf energy is generated from the energy depleted electron beam after it emerges from the wiggler by means of the decelerating cavities which are closely coupled to the accelerating cavities, or by means of a second bore within a single set of cavities. Rf energy generated from the decelerated electron beam is used to supplement energy provided by an external source, such as a klystron, to thereby enhance overall efficiency of the system.

Abstract: A catalac free electron laser using a rf linac (catalac) which acts as a catalyst to accelerate an electron beam in an initial pass through the catalac and decelerate the electron beam during a second pass through the catalac. During the second pass through the catalac, energy is extracted from the electron beam and transformed to energy of the accelerating fields of the catalac to increase efficiency of the device. Various embodiments disclose the use of post linacs to add electron beam energy extracted by the wiggler and the use of supplementary catalacs to extract energy at various energy peaks produced by the free electron laser wiggler to further enhance efficiency of the catalac free electron laser. The catalac free electron laser can be used in conjunction with a simple resonator, a ring resonator or as an amplifier in conjunction with a master oscillator laser.

Abstract: Suspended from a carriage that straddles a standing seam, in which the upper portions of adjoining upright flanges are interlocked, is a vise having a pair of normally spaced jaws with a short length of the standing seam between them. One of the jaws is rigidly connected to the carriage, but the other jaw can be moved toward and away from the first jaw by a fluid pressure cylinder supported by the carriage. The movable jaw is moved toward the other jaw periodically to compress and close the interlocked upper portions of the seam. Each time the jaws are separated the carriage can be moved along the seam in order to close an adjoining length of the seam. Preferably, the carriage is moved along the seam automatically by means of motor-driven rollers that frictionally engage the standing seam. The rollers are rotated to move the carriage only while the vise is released from the seam.

Abstract: A free electron laser system and electron beam system for a free electron laser which use rf feedback to enhance efficiency. Rf energy is extracted from an electron beam by decelerating cavities and returned to accelerating cavities using rf returns such as rf waveguides, rf feedthroughs, etc. This rf energy is added to rf klystron energy to lower the required input energy and thereby enhance energy efficiency of the system.