Abstract: An air curtain generator includes a casing with a fan received therein so as to blow an air curtain from opening of the casing. Two arms are pivotally connected to two end members on two ends of the casing. and each arm is pivotally connected to a fixed member. A link is pivotally connected between the fixed member and the end member so that the casing is able to be adjusted by pivoting the arms. The air curtain separates the workers and the source where generates contaminated air.

Abstract: Method and apparatus for removing dust produced by the treating of human or animal nails. An air current produced by a fan is directed through an adjustable conduit towards the nails being treated. A funnel attached to a second adjustable conduit leading to a filter is positioned beyond the nails so that dust particles are entrained by the air current and carried into the funnel and to the filter. The fan is of sufficient power to cause very fine dust particles to be removed.

Abstract: Apparatus for directing a flow of pressurized air into a vehicle or other compartment includes an air bag inflatable in response to the flow of pressurized air. The air bag includes an inlet opening for receiving the flow and an outlet opening for delivering the flow inside the compartment. Further, the air bag is sized to permit a first portion of the bag, including the outlet opening, to remain inside the compartment while a second portion is withdrawn through a compartment opening. Upon inflation, the bag then expands with air sealing pressure against the perimeter of the compartment opening.

Abstract: An apparatus for cleaning a process chamber that includes a ventilation hood which has a fluid flow channel attached to an inner peripheral wall of the hood body equipped with a plurality of fluid nozzles pointing downwardly toward a process chamber cavity when the hood is positioned on such process chamber, and a method for using the apparatus. A purge gas flown through the fluid nozzles carries substantially all contaminating fumes or particles away from the process chamber cavity into an air evacuation system such as a factory vacuum exhaust system such that contamination of the process chamber can be essentially eliminated.

Abstract: A selectively positionable fluid conduit for gas removal from or gas introduction to a specific environment is disclosed. The fluid conduit includes a tubular wand having an orifice at the distal end thereof. Unwanted gases are removed by suction force through the orifice. Desirable or therapeutic gases are introduced to a specific location through the orifice. The tubular wand is coupled to a malleable positioning tube. The malleable positioning tube can be manipulated into various configurations such that the positioning tube maintains the last chosen configuration. In one disclosed embodiment, the malleable positioning tube includes tubular bellows formed from a plurality of alternating large and small diameter rings joined by frusto-conical walls. In another embodiment, the malleable positioning tube includes a malleable wire associated with a semi-rigid tube. Interaction between the rings and the frusto-conical walls imparts malleable properties to the positioning tube.

Abstract: A device for removal of deleterious impurities from room atmosphere comprises an exhaust hood, a means for delivery of inflow air into the emission zone of deleterious impurities and incorporates slotted nozzles arranged around the perimeter of the hood and oriented towards the source of deleterious impurities, and an apparatus for distributing air from the delivery air duct to the slotted nozzles. The air-distributing apparatus has the form of a distributing chamber disposed in the central part of the hood, communicating with the delivery air duct and provided with pressure branch pipes, one per slotted nozzle, connected, each,;with the corresponding nozzle at the point equidistant from the ends of said nozzle. In a preferable embodiment the nozzles are provided with cellular attachments and the slot width "b" of each nozzle complies with the following ratio: ##EQU1## where b--nozzle width, m;F--cross-sectional area of hood, sq.m;P--hood perimeter, m;H--height of hood above source of deleterious impurities.

Abstract: A smoke removal device, especially designed for use in welding, having one or more portable funnels, with a wide opening through which suction may be directed to remove smoke from particular areas where combustion is taking place, and a narrow opening opposite to the wide opening, a vacuum device for creating the suction by which the smoke is removed, the vacuum device having an inlet valve for each funnel, and hoses connecting the narrow opening of each portable funnel to one of the inlet valves of the vacuum device. In a preferred embodiment, the portable funnel is connected to a base containing magnets. The funnel is connected to the base by a first cylinder extending downward from the funnel, with the first cylinder fitting inside a second cylinder attached to the base, with the funnel and first cylinder being rotatable in relation to the base and the second cylinder. A wheeled, multifilter carriage is provided to clean smoke coming from the funnel before it is exhausted into the surrounding air.

Abstract: An air cleaning system for treating contaminated air from a mechanical industrial process containing a heterogenous multi-component mixed density fluid (e.g., mist, vapor and/or smoke) that addresses the cloud-like behavior of this contaminated air. The air cleaning system continuously captures a contaminated air volume emitted during operation of the mechanical industrial process and mixes that contaminated air volume with an ambient air volume in order to produce a mixed air volume having certain characteristic temperatures and air velocities. The characteristics of the mixed air volume are controlled such that the mixed air volume does not exhibit cloud-like behavior when transferred via a conduit structure to an air cleaning apparatus or the like.

Abstract: A method and system for air-conditioning of a coating station for a paper web in which hot and moist air is removed from the environment of the coating station. In the method, a dry and cool air flow is blown into a working area of a person working at the coating station, to the direct vicinity of the person, so as to air-condition the working area and to constitute breathing air for the person. Out of the working area of the person, from the direct vicinity of the person, hot and moist air is removed as a suction flow. The system for air-conditioning of a coating station for a paper web or equivalent is placed in connection with the coating station and includes an exhaust air device.

Abstract: A work station comprising a portable platform defining a work area for soldering and desoldering operations for electrical/electronic components with fume removal and reduced build-up of static electricity by providing a conductive surface in the work area connected to a ground and an air extraction plenum on the back side of the platform which communicates fumes from the work area to a vent. The fan communicates with the air extraction plenum to induce a negative pressure around a face side of the plenum for moving air and fumes through intake slots into the plenum. Nozzles mounted on a front side of the platform direct low pressure air flowing at a rate of one to four cubic feet per minute across the work station towards to the facing side of the plenum. A method of removing solder fumes is disclosed.

Abstract: A source capture system for capturing contaminated air from an industrial process includes structure both for continuously capturing a contaminated air volume emitted during operation of the industrial process and for mixing that contaminated air volume with an ambient air volume to produce a mixed air volume which is then transferred to an air clean apparatus or the like. The source capture system recognizes that air volumes will exhibit different characteristics traveling through an air treatment system, and that certain of those characteristics such as cloud-like formation and contaminated air volumes having significant gaseous phase vapor components are undesirable and operate to decrease the overall effectiveness of the air treatment system, regardless of what type of technology is used for the air cleaning apparatus.

Abstract: An air cleaning system for treating contaminated air from a mechanical industrial process containing a heterogenous multi-component mixed density fluid (e.g., mist, vapor and/or smoke) that addresses the cloud-like behavior of this contaminated air. The air cleaning system continuously captures a contaminated air volume emitted during operation of the mechanical industrial process and mixes that contaminated air volume with an ambient air volume in order to produce a mixed air volume having certain characteristic temperatures and air velocities. The characteristics of the mixed air volume are controlled such that the mixed air volume does not exhibit cloud-like behavior when transferred via a conduit structure to an air cleaning apparatus or the like.

Abstract: A gas injection apparatus and process to form a controlled atmosphere in a confined space, comprising at least one assembly of ducts installed in series and/or in parallel, of which at least a part (2, 12, 13) of a duct comprises gas injection apertures. The assembly is supplied by at least one gas supply main (9, 14, 15), each main being connected to the assembly at the level of a primary connection node (8, 16, 17), the dimensions of the assembly observing the following relationship:.SIGMA..omega..sub.i /.SIGMA..phi..sub.i .gtoreq.1, preferably .gtoreq.1.5;wherein .SIGMA..omega..sub.i represents the sum of internal sections of the gas supply mains feeding the assembly and .SIGMA..phi..sub.i represents the sum of the cross-sections of the gas injection apertures of the ducts assembly.

Abstract: A blowing port of an apparatus for washing semiconductor materials, has a plurality of passages defined within the duct of the blowing port. At least the upper portion of each passage is formed convergently to its end. The end of each passage of the blowing port forms a transverse slit so as to form laminar flow of clean air flowing substantially horizontally from the blowing port to an opposite suction port. Such laminar air flow covers the respective washing tanks, and thus it prevents vapor generated in chemical washing tanks from entering final washing tanks. Accordingly semiconductor materials washed in final washing tank or tanks are not badly influenced with the described vapor.

Abstract: A method and apparatus for the mechanical ventilation and heating of a premises with improved removal of impurities from air present in the premises. At least one suction extraction device is provided for removing polluted or stale air in a region adjacent to the ceiling of the premises. Pure supply air at a temperature in the region of or exceeding the air temperature of the premises is supplied to the premises in the lower region thereof. The supply air forms a substantially horizontal and vertically narrow air jet for displacement of existing air located in a region proximate the floor. The apparatus (1) includes one low impulse device (10) and one high impulse device (20), in addition to which at least one device (31) is provided for guiding air (supply air) emitted from a fan system to the high impulse device and/or to the low impulse device.

Abstract: A system and method for efficiently and economically providing a sufficient number of air changes per hour to satisfy government recommended standards for proper ventilation of industrial manufacturing facilities. The system is applicable to a building, housing manufacturing facilities and forms an enclosure within the building including the ceiling, floor and certain walls.

Abstract: False-ceiling construction (10), which is intended in particular for institutional kitchens and which false-ceiling construction is composed of modular units, which comprise at leat an intake air unit (11) and an exhaust air unit (18) and, in the area between them, a false-ceiling plate (25), and which false-ceiling construction is formed underneath the ceiling construction (C) proper in a room. The false-ceiling construction (10) includes at least one flow opening (15), passing from the intake air chamber (13) in the intake air unit (11), for a trap-air jet (L.sub.1a) for making the trap-air jet (L.sub.1a) to flow as parallel to the plane (T) of the false-ceiling plate (25) or as slightly inclined in relation to said plane towards the exhaust air opening (20), placed on the exhaust air chamber (19), for the exhaust air flow (L.sub.2). The invention further concerns a method for the flow of air in connection with the false-ceiling construction.

Abstract: A biological safety cabinet comprising an enclosure having two side walls, a rear wall, a bottom wall defining a work surface, a top wall and a front window, below which access can be had to the work surface, the enclosure defining a work area. A plenum surrounds the enclosure and communicates with the work area. A blower induces a negative pressure within the plenum to circulate contaminated air through a filter within the enclosure, which creates a downwardly directed air curtain of work area air below the window. A vertically oriented outwardly facing channel section is secured to each side wall adjacent the window. Each channel section has a downwardly and forwardly sloping upper end, a rear edge of which extends above a lower edge of the window and a front edge of which extends below the lower edge of the window. The plenum communicates with each channel.

Abstract: Apparatus for inhibiting the flow of contaminants in an exhaust enclosure toward an individual located adjacent an opening into the exhaust enclosure by providing a gas flow toward a source of contaminants from a position in front of an individual to urge said contaminants away from the individual toward a gas exit port. The apparatus comprises a gas mani-fold which may be worn by a person as a vest. The manifold has a series of gas outlets on a front face thereof facing away from the individual and toward the contaminants to thereby provide a flow of gas from the front of the individual toward the contaminants.

Abstract: A fluid suction nozzle and a fluid-treating apparatus are used in the cleaning of air inside a local space. The suction nozzle has a suction passage and plural annular discharge passages surrounding the suction passage. The nozzle is connected with an air cleaner, etc. The air inside a local space is to be drawn in through the suction passage. At the same time, a larger amount of air is to be discharged from the discharge passages. The velocity at which fluid will flow from the outer discharge passage is smaller than that at which fluid from the same source will flow from the inner discharge passage.

Abstract: A mechanical conveyor system is provided with an exposed flexible membrane surface for use in clean room environments. The conveyor system may be one of varied subassemblies which transfer articles on the conveyor by small orbital motions. The exposed flexible sheath is preferably a membrane which is permeable to air. The system may provide for air flow through the membrane to ensure a clean environment. A preferred flexible membrane is expanded polytetrafluoroethylene.

Abstract: The invention concerns a ventilation device, through which impure air is removed out of a room, in particular out of the proximity of a source of impurities at a working point in the room space. According to the invention, through the device, besides the removal of impure air and/or excess heat from the source of impurities as a limited-area removal, air of general removal is also removed through the device, the suction opening for general removal being preferably opened into the same exhaust chamber into which the suction opening for the space for collecting of impurities in the interior of, for example, a kitchen hood is opened. The device may also include a flow opening for the general intake. Thus, the device can operate as a device for limited-area ventilation and for general ventilation serving for the whole room.

Abstract: An apparatus for generating at least one oriented jet of gaseous fluid that is movable in a direction substantially perpendicular to this orientation is provided, the apparatus including a hollow box (3), in particular a rectangular parallelepiped with rigid walls (3a), at least one flexible belt (7), which sealingly closes each aforementioned window (5) vertically of its edges (6), and which locally has at least one perforation (8) of predetermined dimensions, a driver for each belt (7) for driving the belt along the longitudinal axis (5a) of the window (5) vertically of which it is located, in such a manner as to displace each perforation of the belt in question along the longitudinal dimension of the window, and an injector for injecting gaseous fluid, in particular air, into the box (3) through an opening (11) made in one of its walls.

Abstract: An intake air unit for supplying air to premises in order to create therein a zone with clean air, whereby the temperature of the air supplied is preferably the same as or lower than the temperature in the premises. Air resistance is provided inside the intake air unit so that air entering said unit is distributed to flow out into said premises through essentially all portions of an air discharge member. In order to permit efficient ventilation without draft the air discharge member comprises a porous material of air filter type, which material is adapted to sieve the discharged air for generating a continuous air flow outside the air discharge unit which is of a substantially same width as said air discharge unit.

Abstract: An air handling system (10) and associated method for supplying filtered air to an operating room (14) in a manner which reduces concentrations of airborne bacteria and other particulates. The system (10) generally includes a plenum (18) mounted at the top of a first wall portion (22) of the operating room (14). A diffuser (48) is closely received in a diffuser opening (46) through which air is communicated from the air chamber (38) of the plenum to the operating room (14). The diffuser (48) is disposed so as to depend downwardly from a point proximate the ceiling of the operating room and converge toward the first end wall (22). Further, at least one air return (60) is provided at the second and opposite wall portion (54) of the operating room (14) for removing air from the room (14) and returning the air to the clean air supply unit (12). Another but smaller portion of the air is removed through at least one air return at the base of the first wall portion of the room.