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Class 34/212 - Recirculation of treating gas or vapor


Subclass of Class 34 - Drying and gas or vapor contact with solids
Definition: Apparatus including means to recirculate the treating gas
No. of patents: 93
Last issue date: 11/01/2011


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NumberTitleIssue Date
8046932Method and apparatus for inhibiting pitch formation in the wet seal exhaust duct of a veneer dryer
A method and apparatus for operating a dryer used to reduce the moisture content of sheet material. A drying chamber is provided and includes a plurality of drying sections and a single point exhaust system. A seal section located at the input end of the dryer inclu...
11/01/2011
7581334Drying apparatus
A drying apparatus is provided with a gas burner indirect heat exchanger wherein a turn down ratio thereof maybe controlled. In a housing of the gas burner indirect heat exchanger, a gas burner and a heat exchanger are contained. Combustible gas in the gas burner is...
09/01/2009
7377052Low temperature clothes dryer
A low temperature clothes dryer having a drying chamber provides removable horizontal screens supporting clothing items and a hanging bar for hanging clothes to be dried. A timing control allows setting the time of operation of the drying cabinet. An electric heater...
05/27/2008
7363728Shrink wrap tunnel with variable set points
A shrink wrap machine has a shrink wrap tunnel with an entrance and an exit. A conveyor transports products to be shrink wrapped from the entrance through the tunnel to the exit. A source of gas is coupled to the inside of the tunnel and bathes the products. A heate...
04/29/2008
7324904Methods for determining dimensional stability of wood products utilizing single and multiple sensor groups
Systems and methods are provided for detecting the potential of a wood sample, such as a board, to stay on grade, i.e., resist warp, after it is put into service and/or its moisture has re-equilibrated with the surrounding environment. The systems and methods includ...
01/29/2008
7269929Heat tunnel for film shrinking
A heat tunnel for applying heated air to articles enclosed in shrink-wrap film includes at least one air supply unit; a conveyor; and a heat shroud spaced from the conveyor. The air supply unit includes a source of heated air, a fan, a heated air plenum, air ducts, ...
09/18/2007
7191546Low temperature clothes dryer
A low temperature clothes dryer having a drying chamber provides removable horizontal screens supporting clothing items and a hanging bar for hanging clothes to be dried. A timing control allows setting the time of operation of the drying cabinet. An electric heater...
03/20/2007
7155876Heat tunnel for film shrinking
A heat tunnel for applying heated air to articles enclosed in shrink-wrap film includes at least one air supply unit; a conveyor; and a heat shroud spaced from the conveyor. Tha air supply unit includes a source of heated air, a fan, a heated air plenum, air ducts, ...
01/02/2007
7073274Drying device
In a dry air blowing plate, rows of dry air outlets are arranged at given intervals in a transport direction of a photosensitive material. The interval between the dry air outlets within the row is narrower in a front zone of the dry air blowing plate that is close ...
07/11/2006
7024799Method for treating products with air, a product treatment device and the products thus treated
The invention relates to a method for treating products with air in order to enable the conservation, storage and use thereof. Said invention also relates to a device for treating such products and the products obtained using said treatment method. The products (P) ...
04/11/2006
6922910Exposure apparatus
An exposure apparatus is provided for performing exposure processes with high accuracy by accurately performing pressure control inside a chamber having a plurality of air-conditioning chambers. The inside of the main chamber which accommodates the exposure apparatu...
08/02/2005
6880545Dual conveyor jet impingement oven
A dual conveyor jet impingement oven having a blower box with at least one air inlet opening and at least two air outlet openings and a heating space adjacent to and in fluid communication with the blower box. Disposed within the heating space are two spaced apart p...
04/19/2005
6760981Compact convection drying chamber for drying printed circuit boards and other electronic assemblies by enhanced evaporation
The invention provides a compact drying chamber for drying printed circuit boards and electronic connectors and components mounted thereto by enhanced evaporation to remove residual water and completely dry printed circuit boards. The compact drying chamber comprise...
07/13/2004
6735882Drying apparatus
A concentration of a gas introduced into a circulation blower and an exhaust blower is reduced with a simple apparatus configuration. In an exhaust system, exhaust gases from a plurality of drying chambers are joined to a joining duct to be then exhausted by an exha...
05/18/2004
6601317High-efficiency drying kiln particularly for wood-like material
A high-efficiency drying kiln, particularly for wood-like material, constituted by an internal chamber, which is covered with thermally insulating material and is provided with at least one opening for loading and extracting the material to be treated; tw...
08/05/2003
6484416Apparatus for producing cement clinker
It is required with respect to the production of cement clinker from wet slurry raw materials that are calcined to cement clinker in a drying-rotary pipe furnace, which is preceded by a cyclone suspension type heat exchanger system, after the materials ha...
11/26/2002
6345450Process for treating green wood and for accelerating drying of green wood
A process for drying or curing green wood including the heating of green wood in a heating enclosure to a predetermined temperature over about 120 F while maintaining the moisture content of the wood close to the original moisture content of the felled wo...
02/12/2002
6289606Apparatus and method for moisture control of particulate material
An apparatus and method for control of moisture content of material such as thermoplastic pellets (80) in a hopper (30) is controlled by supplying dehumidified air from a dessicant bed (90) to the hopper (30) and returning air from the hopper (30) to the ...
09/18/2001
6185835Apparatus for conditioning of commodities for vacuum packing
Apparatus is provided for the conditioning of a commodity (12) such as clothing suitable for vacuum packing in which there is provided a conditioning tunnel (2) including a floor (4), a ceiling (6) and two side walls (8), through which tunnel runs a conve...
02/13/2001
6119364Apparatus for treating green wood and for accelerating drying of green wood
A process for drying or curing green wood including the heating of green wood in a heating enclosure to a predetermined temperature over about 120 F while maintaining the moisture content of the wood close to the original moisture content of the felled wo...
09/19/2000
6112426Thermal compression plant with heat recovery for vacuum dryers and dryer incorporating said plant
A thermal compression plant with heat recovery for vacuum dryers of industrial leathers and similar products with one or more drying chambers (4) each one composed of a heated table (2), on which the products to be dried are laid, and a hermetic cover (3)...
09/05/2000
6076274Vacuum drying cabinet
A vacuum drying cabinet has nozzles on a pipe body which can be removable from but attached to a pipe fitting mounted in the roof of the cabinet and which, when in place, can be coupled to the shaft of a motor for driving the cleaning unit and to the clea...
06/20/2000
6055742Reticle cleaning apparatus for wafer exposure system
A reticle cleaning apparatus for a wafer exposure system includes a chamber enclosing the reticle, a door opening and closing at least one side of the chamber, a door switching member opening and closing the door coupled to the chamber including the door,...
05/02/2000
6029367Grain drying apparatus
A grain drying apparatus uses the heat of an engine to aid in the evaporative process. The grain drying apparatus provides an engine 20 which is used to power a fan 40. Waste heat generated by the engine is transferred to air driven by fan 40 through air ...
02/29/2000
5966832Apparatus for drying wet porous bodies under subcritical temperatures and pressures
An improved apparatus, and related method of operation, is described for rapidly drying large monoliths of glass, ceramic and/or composite material, under subcritical conditions, while minimizing the risk of cracking the monolith during the drying process...
10/19/1999
5960560Thermal solar dehydrator
A thermal solar dehydrator (16) comprising en enclosure (18) having a plurality of drying chambers (20) therein. A plurality of perforated trays (22) are provided. A plurality of runners (24) support the perforated trays (22) in vertically spaced apart re...
10/05/1999
5940983Dehydrating device
A hydrating device includes a food processing chamber and a control unit which communicates with the chamber via two connecting pipes. The control unit has an inclined separating board inclinedly disposed therein and a water exit located corresponding to ...
08/24/1999
5915811Solar drying process and apparatus
A drier with a curvalinear chamber having a heat transfer surface at one end and baffles at the other end. A fan is provided to circulate air within the chamber. In the process for drying, the product to be dried is positioned within the chamber and air c...
06/29/1999
5911486Combination product cooling and flux management apparatus
A combination product cooling and flux management apparatus is mounted above a reflow soldering oven. The apparatus has a sealed housing with four openings: an ambient air inlet, an ambient air outlet, a recirculating gas inlet and a recirculating gas out...
06/15/1999
5864964Longitudinal continuous kiln for drying and vulcanizing rubber profiles
A longitudinal continuous kiln (1) for drying and vulcanizing rubber profiles includes a lower chamber (3), provided with a conveying belt (11), and an upper chamber (2), carrying hot air. A plurality of convectors (8) heated by the hot air of the upper c...
02/02/1999
5862609Method and apparatus for drying solid foodstuffs
A method and apparatus for drying solid foodstuffs is disclosed. The apparatus comprises a housing in which a gas permeable conveyor carrying the foodstuffs is arranged. The housing is divided into at least one drying section and at least one cooling sect...
01/26/1999
5852880Method of drying lumber
A method for drying wood by placing the wood in a dehydration chamber in which the temperature, humidity and pressure are controlled. Air and or gasses are circulated in the chamber to wick away moisture while the wood remains frozen. Both the internal te...
12/29/1998
5815945Pit membrane-broken wood drying method and apparatus
The present invention is intended to artificially break pit membranes in cell membranes of cells constituting wood and then to readily attain dryness of the wood. In view of the fact that one pit or the other pit of pits in the form of a pair is blocked w...
10/06/1998
5687490Method of drying lumber
A method for drying wood by placing the wood in a dehydration chamber in which the temperature, humidity and pressure are controlled. Air and or gasses are circulated in the chamber to wick away moisture while the wood remains frozen. Both the internal te...
11/18/1997
5685710Barn and procedure for Virginia type tobacco curing
The objects of the present invention are a barn and a procedure for curing Virginia type tobacco. The barn consists of an air heating device with an impulsion fan (9) connected by means of an inlet duct (10) to several curing units (1-8) where the Virgini...
11/11/1997
5603168Method and apparatus for controlling a dryer
A method and apparatus for operating a dryer used to reduce the moisture content of sheet material such as a jet veneer dryer. A drying chamber is provided and includes a plurality of individual, juxtaposed drying sections. Each drying section circulates ...
02/18/1997
5595000No-vent dry kiln
A no-vent dry kiln for drying wood products such as lumber. The kiln has a dehumidification unit to remove excess moisture from the air utilized as the drying media. The dry bulb and wet bulb temperatures of the air within the kiln enclosure are precisely...
01/21/1997
5440101Continuous oven with a plurality of heating zones
A pass-through convection oven having a series of gas jet distributors and an exhaust system adjacent later distributors in the series to gather gas for the initial distributors in the series. A distributor in the series is formed of a pair of plenums in ...
08/08/1995
5419799Air-exhausting and pre-pressing apparatus for laminated glass sheets
The invention relates to an air-exhausting and pre-pressing apparatus for laminated glass sheets. In the manufacture of laminated windscreens, the glass sheets are carried on a conveyor in a substantially upright position through a heating tunnel. The suc...
05/30/1995
5185939Apparatus for drying rubber boots and other items
A drying apparatus for rubber boots and other items comprising hollow housing equipment with open front and rear surfaces, disinfectant spraying equipment a low-temperature dehumidifier connected in free communication with the housing equipment, wherein t...
02/16/1993
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