Abstract: An air cleaner is provided that includes: a body housing having an air inlet and a filter discharge outlet; a fan module provided within the body housing; a filter supply module provided within the body housing and configured to provide a filter sheet; a filter transportation module configured to transport the filter sheet from the filter supply module such that the filter sheet passes by the air inlet and is discharged at the filter discharge outlet; and a cutting module configured to cut the filter sheet. The filter transportation module includes: a drive supply roller and a driven supply roller; drive and driven discharge rollers that are positioned a distance apart toward the filter discharge sides, respectively, of the two supply rollers; a first roller drive motor configured to drive the drive supply roller; and a second roller drive motor configured to drive the drive discharge roller.

Abstract: An air filter clog detector that provides a simpler and reliable method of determining clogging level of air filters using a grayscale or color light sensor. An example air filter clog detector includes a light source (e.g., light emitting diode (LED)), light detector, and circuitry (e.g., micro-processor controller). The light source is configured to emit light toward an air filter. The light detector is configured to measure a color of light reflected by the air filter. The circuitry is configured to determine whether the air filter is clogged based on the color of light reflected by the air filter. To prevent the air filter clog detector from becoming dirty, the detector can be positioned on the downstream side of the air filter.

Abstract: A clogged filter detector is provided. In some embodiments, the clogged filter detector may comprise a transmitter, a sensor, and a transmitter resistor array configured to modify the output strength of the transmitter. In some embodiments, the clogged filter detector may comprise a transmitter, a sensor, and a sensor resistor array to configured to adjust the strength of the signal output by the sensor. The clogged filter detector may also include one or more processor configured to adjust the strength of a beam output by the transmitter based on a saturation level.

Abstract: A system includes a filter assembly having a filter material disposed in an air flow, a first pressure transducer disposed upstream of the filter material with respect to the air flow, a second pressure transducer disposed downstream of the filter material with respect to the air flow, and a controller coupled to the first pressure transducer and the second pressure transducer, where the controller receives feedback from the first pressure transducer and the second pressure transducer indicative of a pressure differential of the air flow across the filter material, and where the controller is configured to index the filter when the pressure differential of the air flow across the filter material exceeds a threshold.

Abstract: The invention is directed to replacement media advancing air filter in air handling units with a flow channel. The filter having a housing and an exposure slot with filter media storage area that has an unexposed pleated, folded filter media portion stored therein. The filter media portion being folded and stacked in and compactly held at least in part within the storage area. A motor is coupled to a power supply and in communication with a controller. The motor moves a movement member that moves a portion of the filter media from a stored state in the storage area into the exposure slot and is exposed to the air in the air flow channel creating an exposed portion of the filter media. The exposed portion is collected within a containment area as a further portion of media is moved into the exposure slot to replace the exposed portion therein.

Abstract: A method of manufacturing a selected spacing folded, pleated media by preparing a pre-pleated sheet of filter media having pleats with peaks and troughs throughout its length applying an at least one adhesive element along the pre-pleated sheet of filter media; advancing and cutting the pre-pleated sheet of material; compressing the cut length of pre-pleated sheet of filter material, resulting in folding of the pleats and adherence of the pleats into a folded, pleated filter media stack that is selectively separable; selectively separating the media stack and selecting a pleat spacing for a selected pleat spacing section application of an at least one spacing support element at the peaks of each pleat and refolding and recompressing into a selected spacing folded, pleated media stack wherein the media stack is adhered and can be selectively removed to extend from a compacted state to a deployed state with the selected pleat spacing.

Abstract: An air filtration apparatus operable to be coupled with an air return of a conventional HVAC system wherein the air filtration apparatus is configured to supply a continuous supply of unused air filtration media. The air filtration apparatus further includes a frame having four sides and an opening configured to accommodate any size air return. A first media receptacle and a second media receptacle are mounted on the frame. Disposed within said first media receptacle and said second media receptacle is an air filtration media, wherein the air filtration media is substantially disposed within the first media receptacle in its first position and is disposed within the second media receptacle in its second position. A drive assembly and fan are operably coupled to the air filtration media operable to transition the air filtration media intermediate its first position and second position as a result of airflow through the air return.

Abstract: A replacement filter deployed within a flow channel with a housing having a first of two or more frame members and a second of two or more frame members that are detachable with an exposure slot formed within the housing. A filter media storage area is within the housing, having unexposed, folded, pleated filter media stored therein. The unexposed folded, pleated filter media is compactly held within the filter media storage area. A motor is coupled to a power supply and in communication with a controller. The motor moving a movement member that advances an unexposed portion of the stacked pleated filter media into the exposure slot, expanding and exposing the unexposed portion of the media to the flow channel while retaining pleats and creating an exposed portion of the filter media. A containment area is provided where the exposed portion of the pleated filter media is collected folded, restacked and compactly stored and retained.

Abstract: A filter assembly for removing particles from air flow across the filter assembly with a frame around a perimeter of the filter assembly, dynamic filter media for removing particles from air flowing from an upstream side of the filter assembly to a downstream side of the filter assembly that passes from a clean filter media storage chamber to a used filter media collection chamber within the frame on a second side of the filter assembly. The dynamic filter media is moved from the output from a turbine shaft modified by a gearbox to drive a set of drive traction rollers.

Abstract: A filter assembly for removing particles from air flow across the filter assembly with a frame around a perimeter of the filter assembly, dynamic filter media for removing particles from air flowing from an upstream side of the filter assembly to a downstream side of the filter assembly that passes from a clean filter media storage chamber to a used filter media collection chamber within the frame on a second side of the filter assembly. The dynamic filter media is moved from the output from a turbine shaft modified by a gearbox to drive a set of drive traction rollers.

Abstract: The invention is directed to replacement media advancing air filter in air handling units with a flow channel. The filter having a housing and an exposure slot with filter media storage area that has an unexposed pleated, folded filter media portion stored therein. The filter media portion being folded and stacked in and compactly held at least in part within the storage area. A motor is coupled to a power supply and in communication with a controller. The motor moves a movement member that moves a portion of the filter media from a stored state in the storage area into the exposure slot and is exposed to the air in the air flow channel creating an exposed portion of the filter media. The exposed portion is collected within a containment area as a further portion of media is moved into the exposure slot to replace the exposed portion therein.

Abstract: The invention is directed to a direct replacement air filtration or handler filter that is placed within an air flow channel within an air handler unit having a housing. A motor in communication with a controller and having an at least one sensor input or a timer or a transceiver and processing module. A filter media storage area is located on one end of the housing, with a pleated, folded filter media folded and compactly stored inside the filter media storage area. An exposed filter media containment area is located on an opposed end within the housing with the filter media extending therebetween. The filter media being paid out or advanced from the filter media storage area across the housing where it is exposed to air within the air flow channel as it removes contaminants from the air.

Abstract: A replacement filter deployed within a flow channel with a housing having a first frame member and a second frame member that are detachable with an exposure slot formed within the housing. A filter media storage area is within the housing, having unexposed, folded, pleated filter media stored therein. The unexposed folded, pleated filter media is compactly held within the filter media storage area. A motor is coupled to a power supply and in communication with a controller. The motor moving a movement member that advances an unexposed portion of the stacked pleated filter media into the exposure slot, expanding and exposing the unexposed portion of the media to the flow channel while retaining pleats and creating an exposed portion of the filter media. A containment area is provided where the exposed portion of the pleated filter media is collected folded, restacked and compactly stored and retained.

Abstract: The invention is directed to a direct replacement filter having a housing with an exposure slot with a filter media storage area having unexposed folded, pleated filter media stored therein, being unexposed pleated, folded, and stacked to be compactly held within storage area. An at least one motor is coupled to a power supply and in communication with a controller. An at least movement member is coupled to an at least one support member coupled to the media. A containment area also provided where the controller signals the motor engaging the movement member which is driven such that the movement member drives the at least one support member which engages the unexposed folded pleated filter material, moving the unexposed folded pleated filter media the storage area toward the containment area and moving an exposed portion of the filter media through the at least one exposure slot toward the containment area.

Abstract: A method for renewing a sheet-type filtering material to a flowing gas stream inside a conduit by converting some of the energy of a flowing gas stream traversing the filter assembly to rotate a propeller and the propeller shaft. The rotational energy from the propeller shaft is operably coupled to a gear that causes a supply of unused sheet-type filter material on a first side of the filter assembly top move across the filter assembly to a second side of the filter assembly, so that the portion of the sheet-type filtering material in a position to filter a flowing gas stream changes over time as the flowing gas stream rotates the propeller.

Abstract: The invention is directed to replacement media advancing air filter in air handling units with a flow channel. The filter having a housing and an exposure slot with filter media storage area that has an unexposed pleated, folded filter media portion stored therein. The filter media portion being folded and stacked in and compactly held at least in part within the storage area. A motor is coupled to a power supply and in communication with a controller. The motor moves a movement member that moves a portion of the filter media from a stored state in the storage area into the exposure slot and is exposed to the air in the air flow channel creating an exposed portion of the filter media. The exposed portion is collected within a containment area as a further portion of media is moved into the exposure slot to replace the exposed portion therein.

Abstract: The invention is directed to a direct replacement air handler filter placed within an air flow channel having a housing. The housing having a motor coupled to a power source. The motor being in communication with a controller having an at least one sensor input or a timer. With a filter media storage area located on one end of the housing, having a folded filter media compactly stored inside the filter media storage area, and an exposed filter media containment area located on an opposed end. The filter media extending there between. The filter media is paid out from the filter media storage area across the housing where it is exposed to air within an exposure area and removes contaminants from the air. It is further passed through a seal that seals the containment area where the filter media is re-folded, collected, and compactly stored with the filtered contaminants.

Abstract: An improved gearbox and a method and apparatus for renewing a sheet-type filtering material in a flowing fluid inside a conduit such as for replacement of filters for Heating, Ventilating, and Air Conditioning (HVAC) by applying a force to a force transferring device to ultimately cause movement of a roll of sheet-type filtering material. The method includes attaching one end of the sheet-type filtering material to a gathering roll; stretching the sheet-type filtering material across the conduit and using the force from the force transferring device to rotate the gathering roll, thereby causing a movement of the sheet-type filtering material, in the direction of fluid flow, to the gathering roll thereby advancing the sheet-type filtering material, such that clean filtering material is exposed to the fluid flow.

Abstract: An inner portion of a filter cleaning portion 300 arranged at an inner portion of an interior unit is respectively arranged with cleaning units 300A, 300B constituted by arranging upper brushes 344a, 344b brought into contact with one face of an air filter and lower brushes 322a, 322b brought into contact with other face of the air filter 5 opposedly to each other at filter inlet/outlet 350a, 350b of the filter cleaning portion 300. Further, a longitudinal frame 54 and a transverse frame 55 of an air filter 5 having a filter sheet 51 in a shape of a meshed sheet for catching dust and a frame 52 for supporting the filter sheet 51 are formed on a rear face side (side of heat exchanger 3) of the filter sheet 51.

Abstract: An air filter for electric welding includes a box having an opening for connecting with a sucking tube, an dividing plate dividing the box into an upper chamber communicating with the opening and a lower chamber, a spark blocker inside the upper chamber, a movable filter device set under the spark blocker inside the upper chamber and provided with a cloth filter, a blower inside the lower chamber, and an extractable screening device installed outside it and communicating with the lower chamber. In using, when the blower is switched on, the air is sucked in from the sucking tube to the spark blocker, the movable filter device, the blower and the extractable screening device orderly, blocking sparks completely and achieving an effective filtration.

Abstract: An apparatus and corresponding method for automatically changing out a filter cartridge in a continuous air monitor. The apparatus includes: a first container sized to hold filter cartridge replacements; a second container sized to hold used filter cartridges; a transport insert connectively attached to the first and second containers; a shuttle block, sized to hold the filter cartridges that is located within the transport insert; a transport driver mechanism means used to supply a motive force to move the shuttle block within the transport insert; and, a control means for operating the transport driver mechanism.

Abstract: A hydromechanical driving device generates forward-pushing movements of a band-shaped filter material according to the pressure prevailing in the fluid to be filtered to operate band filter devices. The hydromechanical driving device includes a hydraulic accumulator (29) provided with a movable element (31) separating a first storage space (33) from a second storage space (35). The side of the separating element (31) bordering the first storage space (33) is impinged upon by the pressure generated the first storage space by the fluid to be filtered. A mechanical device (17) translates a movement of the separating element (31) into a forward pushing movement. A pressure control unit (47, 49, 51) generates lower pressure in the second storage space (35) than the pressure generated by the fluid to be filtered according to the amount of pressure and/or the degree of impurity of the fluid to be filtered. The lower pressure causes the separating element to be displaced.

Abstract: A filter system includes a source of clean filter media adjacent a channel through which fluid passes. The filter media is automatically advanced from the source to the channel and eventually to a sealed container adjacent the channel. The filter media is automatically advanced through the channel, where it is replaced with clean filter media in the channel. A controller controls the advancement of the filter media based upon time or based upon a current condition of the filter media.

Abstract: The replacement of filters for Heating, Ventilating, and Air Conditioning (HVAC) is often time-consuming and labor-intensive. Organizations having responsibility for many apartment or dormitory units can spend a significant fraction of their man-hours replacing such filters. A novel approach to reducing the labor for this task is to attach one end of sheet-type filtering material to a dispensing roll, and the other end to a gathering roll; both rolls being affixed to a frame. The assembly is installed into an air duct and the filtering material allowed to blouse, somewhat. The flow of air is intermittent in typical HVAC systems, so when the air begins to flow, the filtering material is forced, due to its resistance to flow, in the direction of the flow. This energy—a force applied through a distance—is utilized by a lever arm bracket to advance the gathering roll. In this fashion, new material leaves the dispensing roll and is exposed to the air, while the dirty filter sheet accumulates on the gathering roll.

Abstract: A self-cleaning strainer which may be installed upstream of a heat exchanger to prevent debris greater than a critical size from reaching the heat exchanger. The strainer is preferably mounted just upstream of a heat exchanger in order to minimize the possibility of debris reaching the heat exchanger. The strainer comprises a screen element which can be advanced across the flow path of the fluid between two rollers. The screen element is placed so that the fluid must flow across the screen element face to continue through the process pipe; the screen may be perpendicular or parallel to the fluid flow axis of the strainer body or at an intermediate angle to it. Flow blocking members are used so as to direct the flow to pass through the screen element.

Abstract: A furnace filter system or kit for installation on an existing furnace duct having upper and lower supply roll supports respectively mountable on the top and bottom walls of the duct adjacent one side wall of the duct for removably receiving a supply roll of filter media therebetween, and upper and lower take-up roll supports respectively mounted on the top and bottom walls of the duct adjacent the other side thereof for removably receiving a filter media take-up roll therebetween. Slots are provided in the side walls of the duct inwardly adjacent the corresponding one of the supply roll and take-up roll and between the top and bottom walls of the duct, and a filter media supporting frame assembly is received in the duct and has opposite sides provided with guide slots therein aligned with the duct slots.

Abstract: A furnace filter assembly for removing dirt and contamination from air entering an existing furnace is installable on the existing furnace without the need for modification thereof, and includes a filter frame, a supply roll for supporting a continuous length of bulk filter media, a take-up roll for receiving the filter media as it is advanced from the supply roll across the filter frame, a motor for rotating the take-up roll for advancing the filter media, all of which components are mounted on the filter frame. The assembly further includes a motor control system having a pressure sensor, a timer, and a switch in electrical communication with a controller for energizing and de-enegizing the motor in response to conditions of the filter media.

Abstract: An automated filter changing device (20) includes a filter reel system (22). A motor (24) is connected to the filter reel system (22). An airflow sensor (26) is in an airflow of the filter reel system (22). A controller (28) is connected to the motor (24) and the airflow sensor (26). The airflow sensor (26) determines when the airflow is below an acceptable threshold. When the airflow is below an acceptable threshold, the controller (28) tells the motor (24) to index the filter reel system (22).

Abstract: A furnace filter system or kit for installation on an existing furnace duct includes upper and lower supply roll supports respectively mountable on the top and bottom walls of the duct adjacent one side wall of the duct for removably receiving a supply roll of filter media therebetween, and upper and lower take-up roll supports respectively mounted on the top and bottom walls of the duct adjacent the other side thereof for removably receiving a filter media take-up roll therebetween. Slots are provided in the side walls of the duct inwardly adjacent the corresponding one of the supply roll and take-up roll and between the top and bottom walls of the duct, and a filter media supporting frame assembly is received in the duct and has opposite sides provided with guide slots therein aligned with the duct slots.

Abstract: This method consists in supplying the various rooms of the premises with air under stable low pressure using a relatively high-pressure fan, in feeding the fan, on the one hand, using fresh air, and, on the other hand, using recycled air, that is to say air that has been displaced by the fan and not let into the premises, and in regulating the respective proportions of fresh air and recycled air so that the proportion of fresh air increases and the proportion of recycled air decreases when the ventilation requirements increase, and so that the proportion of fresh air decreases and the proportion of recycled air increases when the ventilation requirements decrease, so that the delivery rate of the fan is kept almost constant.Application to systems for controlled mechanical ventilation of premises.

Abstract: In a gas cleaning apparatus a filter belt is arranged to move in a flight path across and transverse to a gas flow stream so that successive incremental portions of the filter belt enter the gas flow stream at an entrance point, pass thereacross, and then leave it at an exit point, with and means for moving the successive incremental portions of the filter belt in seriatim into and out of the gas flow stream.

Abstract: A device for a variable-flow ventilation system has a filter (10) associa with a ventilation air intake and a shutter element (12) made of an impermeable material, designed to be applied against filter (10) to cover it wholly or partially. The shutter is associated with a mechanism for controlling shutter movement which is connected to a computer (18) which receives information constituted by the pressure value or flow value at the outlet from the fan housing (2). Depending on the information supplied to the computer, the computer acts to hold the pressure at a constant value by affecting the position of the shutter relative to the filter and/or causing the filter to advance.

Abstract: A device for controlling engine exhaust emission for use on an internal-combustion installation, in which a soot filter is arranged in an exhaust-gas system. The soot filter is made up of a flexible filter band that is traversed by the flow of exhaust gas in a first zone and which can be moved forward and renewed, continuously or intermittently, by a drive mechanism. The filter band is supported at least in the first zone by a flexible, moveable, endless conveyer belt that is permeable to gas and that absorbs tensile stresses. The filter band and the particles separated out of the exhaust gas by the filter band are burned together in a second zone.

Abstract: Air filtration systems and methods which intentionally use collected dust to enhance air filtration performance, use air flow rate control to optimally maintain electro-mechanical efficiency and media permeability, use high velocity discharge to "throw"clean air to preferable workplace areas, and use a cylindrical drum design for pleasing appearance and practical features. The systems and methods are particularly applicable as modular filtration units to textile processing environments, but are suitable for more general applications as well.

Abstract: An air filter and method are presented whereby contaminants such as cotton dust are reduced to an acceptable level in textile mills or the like. The air filter employs an advanceable medium which passes over a drum and the used medium is wound onto a take-up roller. The medium supply roll is protected from contaminants prior to its employment on the drum as it is covered by the used medium on its return path.

Abstract: Air filtering apparatus with electric controls for varying the speed of filtering as a function of the contamination within the air being filtered. Pressure sensing devices are provided at the input and output ends of the filtering apparatus. The sensing devices are coupled with the electrical controls to either speed up or to slow down the filter cleaning mechanisms when appropriate.

Abstract: A lint screen assembly for use in an elongated oven is provided to protect the duct work and nozzles which direct heated air against the fabric being heat treated within the range and is constructed so as to afford winding means for cleaning and rolling up a single pass of fabric intermittently in predetermined lengths for supplying fresh screen material as required.

Abstract: A method and apparatus for removing airborne contaminants entrained in a gas or airstream includes an electric filter characterized by a movable endless belt electrode, a grounded electrode, and a filter medium sandwiched therebetween. Inclusion of the movable, endless belt electrode provides the driving force for advancing the filter medium through the filter, and reduces frictional drag on the filter medium, thereby permitting a wide choice of filter medium materials. Additionally, the belt electrode includes a plurality of pleats in order to provide maximum surface area on which to collect airborne contaminants.

Abstract: A casing is secured to the front of the radiator air intake of a tractor and a cylindrical screen assembly is journalled for free rotation to the casing. A fan blade assembly is secured to the inner end of the cylindrical screen assembly so that air drawn through the radiator by the engine cooling fan, passes through the fan assembly of the screen assembly and rotates the screen assembly. A blanking plate is supported within the screen assembly which blanks off part of the screen as it passes thereby, so that no air passes into the screen assembly in this area. This releases chaff or other debris normally held on the surface of the screen by suction.

Abstract: A central vacuum or air cleaning system handling fibrous materials such as spilled cotton waste in a cotton gin or lint in a textile mill, chaff in grain handling and/or wood dust and dirt in lumber industries and other air contaminating industrial processes. Dirt and lint laden air is drawn into a bin structure with a drum filter or condenser at the top that rotates through an area in operational contact with doffer rolls that remove drum filter deposited lint and dirt to fall down a still chamber provided with an internal plate or baffle extending downwardly from the tower doffer roll a substantial distance approximating one-half the vertical length of the bin. This eliminates pressure differential across the critical area of the doffer rolls that is encountered with filter drum and doffer roll structure delivering deposited lint and dirt waste directly to the exterior.

Abstract: An apparatus and method for separating entrained particulate matter from a fluid wherein particulate matter is collected in an overlying porous layer on an upstream side of a rotatable, fluid-permeable filter in a first chamber, and rotatably conveyed into a second chamber and used as an additional filtering medium. The filter comprises a cylindrical drum having a filter surface thereon and is rotatably mounted in an enclosed housing having a fluid inlet and a fluid outlet. Fluid pumping means operatively communicate with the housing for inducing a flow of fluid into the housing through the inlet and out of the housing through the outlet. Chamber means are disposed within the housing and sealingly cooperate therewith and with the cylindrical drum and define a first chamber fluidly communicating with the inlet and a predetermined portion of the cylindrical drum on the upstream and downstream sides thereof.

Abstract: The changer includes a filter supporting frame attached to a supply spool containing fresh filter material and a take-up spool for storing the clogged filter material. The frame is substantially rectangular in shape and has attached thereto a sensor switch which is disposed medially of the frame and the filter material disposed thereacross. The switch is actuated when the filter material becomes clogged to a point where deflection of the material in response to circulating air flow occurs. The switch actuates a drive motor attached to the take-up spool causing the take-up spool to wind the clogged material thereon thereby replacing it with clean filter material from the supply spool. The filter material itself contains transverse enlarged linear elements which are longitudinally spaced along the filter material at intervals equivalent to the width of the frame. The enlarged areas actuate a switch which causes cessation of the motor drive, thereby insuring accurate placement of the fresh filter material.

Abstract: The invention relates to a continuous and controlled filter device that filters gases and liquids while maintaining a low differential pressure across the filter element. The device automatically advances clean filter medium into the filter seat or window when the differential pressure rises to a predetermined level replacing dirty filter medium with clean filter medium. The advance of the filter medium is effected by a fluid pressure operated expansible device cooperating with an indexing device for positioning the filter medium as a function of the pressure differential extending thereacross. The indexing device may include a ratchet structure for positively positioning preselected portions of the filter medium across the flow passage through which the fluid being filtered is passed.

Abstract: A control circuit for an automatic roll-type air filter including a photocell for detecting the dust load condition of the filter media and for energizing the circuit to cause the filter media to advance in response to the dust loading, a variable resistor to provide adjustment of the set-point at which the circuit is energized, and a fixed value resistor in series with the variable resistor to prevent setting of the variable resistor to a value which would allow the circuit to be energized thereby advancing the filter media when cleaned media is present in the air filter zone of the automatic roll-type air filter.