Abstract:
In a vacuum laser irradiating apparatus disposed between a laser generator and a vacuum vessel in which an object to be irradiated with a laser beam is placed, an outer window plate is airtightly fixed to the outer opening of the apparatus body to maintain the internal cavity of the apparatus body under a vacuum and to pass the laser beam therethrough. This outer window plate is reinforced so as not to be distorted due to pressure difference between an inside vacuum of the apparatus body and an outside atmospheric pressure. This is because the outer window plate is made of an expensive pure monocrystalline material and therefore it is preferably to reduce the thickness thereof for material cost reduction.
Abstract:
This is an apparatus for attaching a removable cover to a large vessel. It is adaptable to existing vessels, especially those which have a mounting rim or flange. It uses multiple connector pins which are attached permanently to the vessel and which can be fastened to the cover assembly by a remote operation. It also uses fluid pressure to force the cover against the vessel opening, after which the cover is mechanically secured in place by a second remote operation.
Abstract:
A cover for a fluid processing chamber is formed of a resilient, heat and chemical resistant laminate of at least three layers. The first layer is a Teflon sheath, the second layer is a blanket heater, and the third layer is a plurality of thin sheets of silicone rubber. The laminate is formed by vacuum formation of the Teflon sheath onto the blanket heater which is supported by the silicone rubber. The opening to the chamber is formed with a rigid lip. The laminate is contained in a stainless steel housing which has an opening therein sized to encompass the perimeter of the chamber lip. Pressure on the cover housing achieves a fluid tight seal with the chamber. No fluid seeps between the cover and the lip even when processing requiring vigorous fluid agitation is carried out in the sealed chamber.
Abstract:
A shaft seal assembly for an apparatus for continuous processing of very viscous media, in particular for producing high molecular weight polymers, having parallel shafts (1) carrying at least two cooperating processing tools (3), with which shafts feed and removal devices for the product to be processed and one reaction chamber (4), which can be subjected to a vacuum, are associated, has sealing means having at least one slide ring seal (46, 55), by which means the reaction chamber is sealed off, in the vicinity of the shaft ducting devices, from a confining-liquid chamber (11) located on the outside and surrounding the shaft ends, which chamber contains confining liquid. To avoid the entry of confining liquid into the reaction chamber and to improve the sealing action, the arrangement is selected such that on the side oriented toward the reaction chamber, adjoining the sealing means, each shaft (1) is surrounded by an inert gas cushion, which has a higher pressure than the confining liquid and is defined, sealed off from the reaction chamber (4), by means of housing parts (81) surrounding the shafts over a portion of their length as well as by means of the product to be processed, which surrounds the shafts and is under pressure.
Abstract:
This invention relates to a polymerization reaction vessel having a coating on the inner surfaces thereof resulting from applying thereto an aqueous coating composition containing an unneutralized lightly crosslinked interpolymer of one or more carboxylic acid monomers with a polyunsaturated compound having a plurality of terminally unsaturated polymerizable groups whereby polymer buildup on said inner surfaces is substantially eliminated. Optionally, there is employed in the coating composition a water-soluble surfactant which contains polyether-type hydrophilic segments, such as, for example, polyoxyethylene (20) sorbitan monooleate. Multiple charges or batches of polymer can be made in said internally-coated reaction vessel without opening the same between charges, thus preventing the escape of unreacted monomer to the surrounding atmosphere.
Abstract:
The invention relates to a device for sealing an opening (7) defined by an edge (6), comprising a sealing element (2, 102), the dimensions of which are at least equal to those of the opening (7), means for securing the said sealing element opposite the opening, and means for ensuring fluid-tightness between the sealing element (2, 102) and the edge (6). The means for ensuring tightness between the sealing element (2, 102) and the edge (6) consists of a flexible membrane (8), means for fixing the circumference of this membrane to the sealing element (2, 102) so as to define a volume (16) between the membrane (8) and the sealing element (2, 102), and a communication hole (18, 32) provided in the sealing element so as to connect the volume (16) to a source of pressurized fluid.
Abstract:
Disclosed are an apparatus and a method for carrying out and studying catalysis and catalyzed chemical reactions. Disclosed is a reactor with a catalyst zone, under vacuum, into which a very rapid pulse of reactant gas is pulsed. The products are analyzed by a real-time method of analysis, such as mass spectrometry. The apparatus and method can detect reaction intermediates and products, and can indicate their sequence of production.
Abstract:
An isostatic press includes a closed press frame, there being a pressure chamber bearing against a first interior portion of the frame. A conveyor path for pressure chamber closures (3) each carrying a press tool part, extends through the frame under the pressure chamber, displacement means being arranged for lifting in the plane of the frame a chamber closure (3) into contact with the pressure chamber. During pressurization of the pressure chamber (1) the closure (3) is carried by two separate support legs (4,5) pivotably mounted in the plane of the frame, the conveyor path extending between the legs. The closure (3) is carried in the plane of the frame by a portion (72) of the conveyor path, which constitutes the lower press table of the press and is supported by the legs. The free end surfaces of the legs may have an arcuate contour in the plane of the frame and coact with complementally formed surfaces on the underside of said portion (72). The center of curvature for the circular end surface is preferably displaced inwardly towards the interior of the frame from the mean force line (A) of the respective leg.
Abstract:
A window seal apparatus capable of transmitting infrared radiation for use under high temperature ultra-high vacuum conditions. The apparatus includes a window clamped between an annular rim of a clamp flange and an annular rim of a sealing flange. The rim of the sealing flange includes an annular sealing knob machined therein having an annular indentation in its upper surface. An annular lead gasket is located between the sealing knob and one side of the window. An annular lead gasket having roughened surfaces is positioned adjacent to the other side of the window and a TEFLON gasket is positioned adjacent to the annular rim of the clamp flange. A constant force means is provided for pushing the clamp flange toward the window and the sealing flange thereby producing a seal therebetween. The window is preferably formed from alkali halide material.
Abstract:
A loadlock apparatus for a workpiece processing chamber such as those incorporated in vacuum processing systems. The apparatus includes an isolation chamber having evacuation apertures and workpiece transfer apertures with independently operable doors for closing and sealing the workpiece transfer apertures and an independent operable workpiece transfer mechanism. The doors and workpiece transfer mechanisms may be contained within the isolation chamber and the chamber may be closed and sealed while containing a workpiece. The door and workpiece transfer mechanisms may be adapted such that they are not positioned over the workpiece, thereby reducing the possibility of workpiece particulate contamination.The preferred embodiment of the workpiece transfer mechanism moves a workpiece through the isolation chamber along a path which is essentially a straight line. An alternative embodiment of this transfer mechanism permits positioning the workpiece at any point lying on or within a circular radius of a fixed point within the isolation chamber. This alternative embodiment can further move the workpiece to any such point along an arbitrarily chosen planar path lying within this positioning circle.