Fibrous Or Filamentary Pad Patents (Class 96/364)
  • Patent number: 9389021
    Abstract: A cooling system connected to the air inlet of an air cooled chiller, having at least one frame, at least one net through which the air absorbed by the chiller is passed, at least one liquid spraying component performing spraying on the front part of said net's outer surface not facing the chiller, contrariwise to the chiller and to the incoming direction of air, at least one liquid supply kit sending liquid to said liquid spraying component and at least one liquid transmission instrument carrying the liquid from the liquid supply kit to the spraying component. A cooling method wherein this system is used is also provided.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: July 12, 2016
    Inventor: Cuneyt Aksuyek
  • Patent number: 8882890
    Abstract: Embodiments of apparatuses and methods for separating liquefiable hydrocarbons from H2-, hydrocarbon-containing gas streams are provided. In one example, a method comprises positioning a H2-, hydrocarbon-containing gas stream in an internal volume of a vessel below a heat exchange absorption section. A hydrocarbon-containing liquid stream is positioned in the internal volume above the heat exchange absorption section. The hydrocarbon-containing liquid stream is countercurrent contacted with at least a portion of the H2-, hydrocarbon-containing gas stream along a tube portion of the heat exchange absorption section to separate H2 and C3+ hydrocarbons. The hydrocarbon-containing liquid stream and the at least the portion of the H2-, hydrocarbon-containing gas stream are cooled along the tube portion to facilitate separating H2 and C3+ hydrocarbons.
    Type: Grant
    Filed: December 27, 2012
    Date of Patent: November 11, 2014
    Assignee: UOP LLC
    Inventors: Frank S. Rosser, Larry D. Awe
  • Patent number: 8758466
    Abstract: A device in a pipe has an annular partition spaced radially inwardly from an inner face of the pipe and defining therewith an upstream annular space opening axially upstream of the direction into the pipe such that a secondary gas stream is separated from the primary gas stream along with a liquid film on the inner surface, a downstream annular space larger than the upstream annular space, and a droplet separator opening into the downstream annular space. The separator has a plurality of lamellas, a condensate sump, and a drain, so that the edge film intercepted by the partition into the upstream space passes therefrom into the downstream space and therefrom through the separator such that the liquid of the film flows into the sump and out the drain and the secondary gas stream passes out of the separator.
    Type: Grant
    Filed: February 18, 2011
    Date of Patent: June 24, 2014
    Assignee: Munters Euroform GmbH
    Inventor: Matthias Jansen
  • Patent number: 8657929
    Abstract: Presented is a method and apparatus for treating an exhaust gas. A series of filters and conditioning units are used to separate and extract various substances from the exhaust gas, typically originating from an industrial process. In an exemplary embodiment, a cyclone filter, a ceramic filter, a baghouse filter, and a pair of gas conditioners are used to initially separate and extract iron-rich dust from an exhaust gas and then extract zinc from the gas.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: February 25, 2014
    Assignee: Arcelormittal Investigacion y Desarrollo
    Inventor: Naiyang Ma
  • Patent number: 8540804
    Abstract: Methods for removing sulfur from a gas stream prior to sending the gas stream to a gas separation membrane system are provided. Two schemes are available. When the sulfur content is high or flow is relatively high, a scheme including two columns where one tower is regenerated if the sulfur concentration exceeds a preset value can be used. When the sulfur content is low or flow is relatively low, a scheme including one column and an absorption bed.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: September 24, 2013
    Assignee: Saudi Arabian Oil Company
    Inventors: Milind M. Vaidya, Jean-Pierre R. Ballaguet, Sebastien A. Duval, Anwar H. Khawajah
  • Patent number: 8425663
    Abstract: A process for the extraction of an unwanted material from a gas comprising the steps of introducing an extraction liquid into a fluid having an unwanted liquid therein to form a physical aerosol comprising a plurality of extraction liquid droplets and the fluid, allowing the plurality of extraction liquid droplets to interact with the unwanted liquid in the gas to cause the extraction liquid droplets to be “wetted out” and captured on a porous medium, where the liquid is further contacted by the gas and simultaneously formed into a plurality of coalesceable droplets, coalescing the coalesceable droplets into larger droplets containing the unwanted liquid, and separating the larger droplets containing the unwanted liquid from the fluid.
    Type: Grant
    Filed: October 30, 2007
    Date of Patent: April 23, 2013
    Inventors: Matt Thundyil, Michael Spearman, Martin Miller, Doug Mittlesteadt, Heath Burns, Carl Hahn
  • Patent number: 7981099
    Abstract: A high performance flatus gas filter assembly, and a body waste collection pouch with which it may be used, along with a method for making such an assembly, are disclosed. The assembly includes a filter pad having first and second layers of deodorizing filter media with an imperforate gas and odor barrier layer sandwiched therebetween for blocking the direct flow of gases between the opposing inner faces of the filter layers. An envelope of liquid and gas impermeable material defines a chamber for enclosing the pad. The envelope has walls with first and second openings communicating with central portions of the first and second filter layers, and defines a peripheral space about the pad to permit the outward flow of flatus gases from the peripheral edge surface of one of the filter layers inwardly into the peripheral edge surface of the other of the filter layers.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: July 19, 2011
    Assignee: Hollister Incorporated
    Inventor: Donncha R. Butler
  • Patent number: 7819960
    Abstract: In one aspect of the invention there is provided a gas scrubbing system for removing contaminants from a flow of fluid, comprising a container having an interior volume, an inlet for receiving the flow of fluid and an outlet for dispensing the stream of fluid, a treatment liquid, a porous medium positioned in the interior volume, between the inlet and outlet, said porous medium providing a high surface area to facilitate chemical interactions between the fluid flow and the treatment liquid and means to apply the treatment liquid onto the porous medium. A contact cell aspect of the porous medium and a method aspect are also provided.
    Type: Grant
    Filed: March 9, 2008
    Date of Patent: October 26, 2010
    Inventor: Dennis Saboe
  • Publication number: 20090297408
    Abstract: In the formation of an oxide film on an aluminum fiber, it has been difficult to form a thick alumina coating film on the aluminum fiber which already has a natural oxide film formed thereon. To overcome this problem, there is provided a method for forming an alumina coating film which enables the deep penetration of oxygen into an aluminum fiber by employing a three-stage heating treatment and an alumina fiber formed by the method. Also provided is a system for producing water by photocatalytic reaction, in which a photocatalyst comprising the alumina fiber coated with titania is irradiated with light from a light source to generate an active oxygen species, diffusing the active oxygen species in water to impart the function of the active oxygen species to water. The system can perform washing by utilizing an oxidation reaction with the resulting water. Further, provided is a gas treatment system which comprises the alumina fiber coated with titania to impart a photocatalytic function to the aluminum fiber.
    Type: Application
    Filed: June 30, 2006
    Publication date: December 3, 2009
    Inventors: Kenichiro Tanaka, Licca Tanaka, Tsutomu Harada
  • Publication number: 20090255406
    Abstract: A lubricating liquid separator is disclosed which can damp a compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister (6) having a sound absorbing performance is disposed on an outer periphery side of a partition plate (5). Compressed gas which enters the interior of a housing (2) through a compressed gas inlet port (3) flows as rotating flow in a flow path (10) formed between the partition plate (5) and a portion of a side wall of the housing (2) opposed to the partition plate (5). Pressure pulsation of the compressed gas is diminished by the demister (6), and a compressor pulsation noise induced by the rotating flow of the compressed gas is diminished by the sound absorbing performance of the demister (6).
    Type: Application
    Filed: January 2, 2009
    Publication date: October 15, 2009
    Inventors: Toru Sakatani, Eiji Kanki, Yasumasa Kimura
  • Patent number: 7461835
    Abstract: An air humidifier has an electric fan unit arranged in a housing for delivering a through-flow of air between feed-air and discharge-air openings in the housing; at least one filter device for the through-flow of air; and a device for releasing liquid to the through-flow of air. A first housing component accommodates the fan unit with filter strips and feed-air and discharge-air openings. A second housing component is a vessel for storing liquid. The two housing components form autonomous structural units which can be fixed to and detached from one another. It is possible for the first housing component to be utilized as a separate unit independently of the second housing component.
    Type: Grant
    Filed: January 24, 2002
    Date of Patent: December 9, 2008
    Assignee: Petz Industries GmbH & Co. KG
    Inventors: Gunter Petz, Rolf Petz
  • Patent number: 7364140
    Abstract: A continuous positive airway pressure (CPAP) apparatus to supply pressurized breathable gas to a patient includes a flow generator having a gas inlet and a gas outlet, a humidifier having a gas inlet coupled to the gas outlet of the flow generator, and a filter operatively positioned between the gas outlet of the flow generator and the gas inlet of the humidifier.
    Type: Grant
    Filed: September 29, 2006
    Date of Patent: April 29, 2008
    Assignee: ResMed Limited
    Inventors: Matthew Lipscombe, Richard L. Jones
  • Patent number: 6863716
    Abstract: An air purification system which is well-suited to removing particles from outside air as the air flows into a cleanroom used in the fabrication of semiconductor integrated circuits. A housing provides at least one spray nozzle for spraying fine mist water droplets. In use, the water droplets capture the airborne particles in the air flowing through the housing and adhere to the water droplet target. The water droplets coalesce and form larger droplets which adhere to the surface of the water droplet target and ultimately collect in a drain pan. The low-density water droplet target prevents large pressure differentials from forming in the housing, which pressure differentials may otherwise cause re-vaporization of the water droplets from the target and re-flow of the particles in the flowing air.
    Type: Grant
    Filed: January 31, 2003
    Date of Patent: March 8, 2005
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Yung-Dar Chen, Po-Sung Kuo, Yen-Chun Wang
  • Patent number: 6840987
    Abstract: An air filtering apparatus for purifying air. The air filtering apparatus includes an enclosure for coupling to ducting of a ventilation system. The enclosure has an interior defined by a top wall, a bottom wall, a pair of side walls, a first end wall, and a second end wall. A plurality of filters comprises a pair of wet filters and a pair of dry filters positioned in the interior. A pair of pump members supplies water from an enclosure reservoir to each of the wet filters. A supply assembly supplies water to the enclosure reservoir. A drain assembly drains the enclosure reservoir at preset intervals. A fan member forces exterior air through each of the filter members and outwardly through a duct aperture in the first end wall. A control assembly controls each of the pump members and the drain assembly to coordinate a purge sequence of the enclosure reservoir.
    Type: Grant
    Filed: January 10, 2003
    Date of Patent: January 11, 2005
    Inventors: Eliu P. Gonzalez, Eliu M. Gonzalez
  • Patent number: 6784320
    Abstract: In a decarbonation process for removing carbon dioxide from a carbon dioxide-containing gas with the use of an amine compound-containing absorbing solution, an amine compound accompanying a decarbonated exhaust gas is efficiently recovered in the following manner: A water washing section is constituted in two stages, a first-stage water washing section 64 and a second-stage water washing section 65. In these water washing sections, recovery of the amine compound accompanying the decarbonated exhaust gas is performed sequentially. Regeneration tower refluxed water is supplied as washing water to the second-stage water washing section 65. Washing water is withdrawn from the second-stage water washing section 65 and supplied to the first-stage water washing section 64. Demisters 83, 84 and 85 are provided at outlets of a carbon dioxide absorption section 73, the first-stage water washing section 64 and the second-stage water washing section 65.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: August 31, 2004
    Assignees: The Kansai Electric Power Co., Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Tomio Mimura, Takashi Nojo, Kazuo Ishida, Hiroshi Nakashoji, Hiroshi Tanaka, Takuya Hirata
  • Patent number: 6645273
    Abstract: A method for removing impurity substances in air flowing in a flow passage includes filtering the air in a first filter for removing solid substances; cooling the air in a first cooler to not higher than its dew-point temperature; capturing gaseous substances in the air in a wet-type impurity removing apparatus; cooling the air in a second cooler; and filtering in a second filter. The wet-type impurity removing apparatus includes a first liquid atomizer having two pluralities of nozzle ports for spraying, arranged mutually spaced apart and facing each other in the direction of the air flow passage; first and second condensing and capturing assemblies located across the first atomizer and spaced apart from each other, with the first assembly being upstream and the second assembly being downstream from the first atomizer; a second atomizer for capturing any remaining gaseous substances in the air; and a third condensing and capturing assembly.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: November 11, 2003
    Assignee: Oki Electric Industry Co, LTD
    Inventors: Hidetoshi Wakamatsu, Mikio Matsuki, Norio Tanaka, Hiroshi Ogata
  • Patent number: 6613130
    Abstract: A filter device for removing combustion gases and/or particulate matter from air comprises a cooling unit and filtering unit. The cooling unit has an inlet for receiving an air stream containing combustion gases and/or particulate matter, a cooling member for lowering the temperature of the air stream, a first outlet for discharge of a condensate, and a second outlet for discharge of the air stream containing uncondensed particulate matter. The filtering unit has an inlet for receiving the air stream containing uncondensed particulate matter from the second outlet of the cooling unit, the filtering unit having at least one filter barrier through which the air stream passes, the filter barrier being configured to catch at least a portion of the particulate matter in the air stream. The invention is also for a process for removing combustion gases and/or particulate matter from an air stream.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: September 2, 2003
    Assignee: G.E.N. Industries Corp
    Inventor: John Givargis
  • Patent number: 6478461
    Abstract: A hot-mix asphalt manufacturing system including treatment of emissions and recirculated gases includes a counter-flow rotary dryer 12 having a combustion chamber 28, an inlet 24 for dry ingredients, an outlet 26 for hot-mix asphalt, and a plate collector 70 for treating recirculated gases. A fiber bed filter 90 (FIG. 5) is provided to remove hydrocarbons and particulates from the rotary dryer emissions before they are released into the surrounding environment. A cooling zone 92 is provided upstream from the fiber bed filter to cool the emissions to a temperature that is compatible with the fiber bed filter.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: November 12, 2002
    Assignee: RAP Technologies, Inc.
    Inventor: Robert E. Frank
  • Patent number: 6248155
    Abstract: A humidifier/air purifier including a housing defining a water reservoir, an air inlet opening and an air outlet opening; a generally V-shaped wicking element in fluid communication with the reservoir; an air filter with a generally V-shaped air filter medium and a frame supporting the air filter medium mounted above the wicking element; and a blower for causing air flow through the air inlet opening, through the wicking element, through the air filter, and through the air outlet opening.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: June 19, 2001
    Assignee: Bemis Manufacturing Company
    Inventor: John W. Seaman
  • Patent number: 6206955
    Abstract: An improved vacuum cleaner apparatus having at least three stages of dust collection with a path partially submerged in water and provided with a separation labyrinth. The apparatus is subdivided into two parts, an upper one which includes the support body of a suction motor unit, and a lower one which includes the labyrinth. The lower one provides an intermediate washable filter. The support body is housed in an opening coated by an acoustic insulating material.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: March 27, 2001
    Assignee: W.S. S.p.A.
    Inventor: Silvano Pietrobon
  • Patent number: 6117404
    Abstract: The present invention provides a process for recovering a basic amine compound which comprises the steps of (a) supplying a CO.sub.2 -containing gas to a carbon dioxide absorption unit in which an absorbing solution, which contains a basic amine compound, absorbs carbon dioxide; (b) bringing the gas, from which carbon dioxide has been removed, into vapor-liquid contact with a washing water at a temperature from 20 to C. in an amine recovering unit of a carbon dioxide removal tower, recovering part of the basic amine compound accompanying the gas into the water phase and discharging the gas as an exhaust gas of the carbon dioxide removal tower; and (c) collecting the basic amine compound which remains in the exhaust gas of the carbon dioxide removal tower by passing the exhaust gas pass through a demister at a temperature from 20 to C. The basic amine compound can be recovered efficiently from the gas of the carbon dioxide removal tower by using the above process.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: September 12, 2000
    Assignees: The Kansai Electric Power, Co., Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Tomio Mimura, Hidenobu Shimayoshi, Shigeaki Mitsuoka, Hiroshi Tanaka, Masaki Iijima
  • Patent number: 5922093
    Abstract: An ultra-filtration vacuum system with a first liquid stage filter and that has structure to direct particle laden air into a vortex in a circular cyclone chamber over a surface of a first liquid filter medium to direct particulates in the air to a wall of the cyclone chamber for collection by the first liquid filter medium. An open-pore labyrinth filter is provided for further filtering air from the first liquid stage. A second liquid stage is provided to filter for filtering air from the labyrinth filter and has a dispersion chamber with an inlet that directs the particle laden air from the labyrinth filter directly into a second liquid filter medium to transfer momentum of the air directly to the second liquid filter medium, the dispersion chamber constructed with surfaces against which medium is propelled by the energy of the injected air to disperse the medium in the air, the dispersion chamber shaped such that a cascading and undulating liquid surface is formed.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: July 13, 1999
    Assignee: Miracle Marketing Corporation
    Inventors: Randy Bruce James, Michael John Edgington, Guy Merideth Hatch
  • Patent number: 4159892
    Abstract: A method for preparation of the final film used for engraving a flat screen, belt screen or rotary screen for a printing machine. The final film is prepared from a photograph of the image to be reproduced and engraved by known techniques on a screen so as to provide a continuous repetitive pattern on the face of a pile fabric dyed in a continuous print dyeing process.Select areas of photographic images are montaged and put into a repeat pattern within a predetermined outline to establish the basic repeat. Four continuous tone color separations are made of the selected pattern to provide yellow, blue, red and black continuous tone negatives which represent the four colors of the original image. Each color separation is posterized and half toned to provide eight positive films. The films are selectively combined, blown up to the desired repeat size to provide a negative or positive which is used to prepare a flat bed screen or rotary screen for an otherwise conventional printing process.
    Type: Grant
    Filed: August 30, 1977
    Date of Patent: July 3, 1979
    Assignee: World Carpets, Inc.
    Inventor: Jon M. Blumenaus
  • Patent number: 4154614
    Abstract: The photosensitive composition contains a water-soluble graft copolymer of a partially hydrolyzed polyvinyl acetate grafted with acrylonitrile and optionally another vinylic monomer, a polymeric emulsion and a diazo compound. This composition possesses high resistance to solvent, abrasion and moisture and a favorable water-dissolubility as well.
    Type: Grant
    Filed: August 25, 1977
    Date of Patent: May 15, 1979
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Takahiro Tsunoda, Sadayoshi Kaneda, Shin Saito
  • Patent number: 4142464
    Abstract: Screen printing and stencil articles, apparatus and methods provide a stencil including a screen and photosensitive emulsion for selectively stopping areas of the screen upon photographic exposure and development. One or more sheets are adapted to receive an image pattern through which the photosensitive emulsion is to be exposed. The photosensitive emulsion is shielded against spurious exposure. The screen with shielded photosensitive emulsion and the one or more pattern receiving sheets are combined into a unitary stencil making assembly.A stencil comprises a rectangular screen having meshes. A first area on the screen is stopped and a second area adjacent the first area comprises open meshes of the screen. A first elongate screen mounting member is attached to and extends along a first side of the screen. A second elongate screen mounting member is attached to and extends along an opposite second side of the screen. The screen itself is self-supporting between the first and second mounting members.
    Type: Grant
    Filed: November 15, 1976
    Date of Patent: March 6, 1979
    Inventor: Georg Rauch
  • Patent number: 4137842
    Abstract: System for applying decorative imprints to the surfaces of plastic workpieces by means of a heated silk-screen technique wherein the screen is initially coated with a silicone release agent which prevents sticking of the heated screen to the plastic workpiece and facilitates its easy removal from the workpiece while at the same time insuring good deposition of the printed material.
    Type: Grant
    Filed: March 2, 1977
    Date of Patent: February 6, 1979
    Assignee: Miller Screen & Design, Inc.
    Inventor: Henry L. Miller
  • Patent number: 4133919
    Abstract: In a method of making decorative panels, a liquid masking material is applied to a surface of a panel, and is cured to form a substantially solid masking layer on the surface. A pattern comprising at least one unmasked area and at least one masked area is formed in the masking layer either simultaneously with the application of the liquid masking material or subsequent to the curing step. The surface of the panel is then treated to render the unmasked areas of the surface of the panel visually distinguishable from the masked areas. In one embodiment of the invention the masking layer is elastomeric and the surface of the panel is treated by sandblasting, after which the masking layer is removed. The entire process may then be repeated to provide a dual density effect. In another embodiment of the invention an asphaltum masking layer is applied to a mirror forming layer on a panel, after which the portions of the mirror forming layer corresponding to the unmasked areas are chemically removed.
    Type: Grant
    Filed: October 12, 1977
    Date of Patent: January 9, 1979
    Inventor: Robert C. Parsons
  • Patent number: 4109028
    Abstract: Disclosed is a method of preparing a cathode for use in the electrodeposition of metallic structures in a predetermined pattern. A porous planar member is provided with a masked region of its porous surface corresponding to the desired pattern of the metallic filaments. A mating planar surface of a cathode base is cleaned, preferably leaving a tightly adhering intermediate coating on the planar surface, and then a non-conductive material, preferably an epoxy based resin ink, is forced through the porous planar member and printed onto the planar surface of the cathode base. The masked region of the porous member will prevent the printing in a region corresponding to the desired pattern on the cathode surface.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: August 22, 1978
    Assignee: Kennecott Copper Corporation
    Inventors: Edwin Lewis Owen, David William Marshall
  • Patent number: 4093754
    Abstract: In a method of making decorative panels, a liquid masking material is applied to a surface of a panel, and is cured to form a substantially solid masking layer on the surface. A pattern comprising at least one unmasked area and at least one masked area is formed in the masking layer either simultaneously with the application of the liquid masking material or subsequent to the curing step. The surface of the panel is then treated to render the unmasked areas of the surface of the panel visually distinguishable from the masked areas. In one embodiment of the invention the masking layer is elastomeric and the surface of the panel is treated by sandblasting, after which the masking layer is removed. The entire process may then be repeated to provide a dual density effect. In another embodiment of the invention an asphaltum masking layer is applied to a mirror forming layer on a panel, after which the portions of the mirror forming layer corresponding to the unmasked areas are chemically removed.
    Type: Grant
    Filed: April 15, 1976
    Date of Patent: June 6, 1978
    Inventor: Robert C. Parsons
  • Patent number: 4093464
    Abstract: A light-sensitive layer transfer material and such layer disposed on a carrier, for use in screen-printing stencils, printed circuit boards, integrated circuits, intaglio printing plates, relief printing plates, proof prints and the like, which comprises an alkali-soluble phenolic resin, such as phenol-formaldehyde novolacs, an ester or an amide of an o-naphthoquinone-diazide sulphonic acid, such as the p-cumyl phenyl ester of 1,2-naphthoquinone-2-diazide-4-sulphonic acid, etc., and an acrylic resin, such as a polymer of an alkyl ester of acrylic acid or methacrylic acid.
    Type: Grant
    Filed: July 26, 1973
    Date of Patent: June 6, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans Ruckert, Barbara Wildenhain
  • Patent number: 4076535
    Abstract: Screens for use in screen process printing are prepared by applying a dry emulsion film to a layer of liquid emulsion carried on the outer surface of a screen fabric in such a manner that upon drying, the dry emulsion film and the liquid emulsion layer are coalesced into a unitary emulsion layer which surrounds the screen fabric. The coalesced emulsion layer has a smooth surface which extends a uniform distance above the screen fabric. Screens thus produced are used to prepare photographic stencils for use in screen process printing.
    Type: Grant
    Filed: August 7, 1975
    Date of Patent: February 28, 1978
    Assignee: Carnation Company
    Inventor: Paul R. Vander Putten
  • Patent number: 4064287
    Abstract: Highly durable coatings are formed by the photopolymerization of screen printing inks containing aryloxyalkyl acrylate monomers or prepolymers, a polymerizable diluent and a free-radical initiating system, such inks having a viscosity of 5,000 to 200,000 centipoises and a thixotropic index of from 1 to 6. The photopolymerizable inks are useful for coating substrates, such as printed circuits, and serve as solder masks and resists for electroless plating, electroplating and etching.
    Type: Grant
    Filed: June 1, 1976
    Date of Patent: December 20, 1977
    Assignee: Dynachem Corporation
    Inventors: Melvin A. Lipson, Dale W. Knoth, Walter D. Custer, Michael N. Gilano
  • Patent number: 4021243
    Abstract: This invention relates to a light-sensitive copying composition for the preparation of screen printing stencils comprising a condensation product of an aromatic diazonium compound in admixture with a hydrophilic hardenable binder, the condensation product containing at least one unit each of the general types A(-D).sub.
    Type: Grant
    Filed: January 22, 1976
    Date of Patent: May 3, 1977
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hartmut Steppan, Hans Ruckert
  • Patent number: 4012257
    Abstract: A method of producing gravure printing surfaces is disclosed. The method utilizes a separately produced screened negative made on orthochromatic film and a continuous tone negative. Both negatives are superimposed to produce a positive with variable size dots and variable tone densities which are then utilized to expose the carbon tissue resist used to etch the printing surface. Alternatively, the negatives are utilized to produce corresponding positives each of which is used to expose the carbon tissue.
    Type: Grant
    Filed: February 13, 1976
    Date of Patent: March 15, 1977
    Inventor: Frank T. Geris
  • Patent number: 3988153
    Abstract: A method of forming an iris diaphragm for use in a corpuscular beam apparatus and having a thin metal layer with at least one opening and an integral reinforcing portion of the same metal which is set back from each of the openings characterized by providing a substrate with the first mask leaving an unexposed surface of the configuration of the thin metal layer, applying a thin metal layer on the exposed surface, forming a second mask having configuration of the reinforcing portion of the iris diaphragm and including a portion covering the thin metal layer adjacent each opening, applying a second thicker layer of the same metal to form a reinforcing portion and subsequently removing the iris diaphragm from the surface of the substrate. Preferably, each of the masks are formed by a photo development process and the metal layers are applied by electro-depositing.
    Type: Grant
    Filed: May 21, 1975
    Date of Patent: October 26, 1976
    Assignee: Siemens Aktiengesellschaft
    Inventor: Alfred Politycki
  • Patent number: 3961961
    Abstract: A positive and negative developable photosensitive composition including a photopolymerizable monomer, photoinitiator, and a blend of polymers, one an acid soluble amino containing polymer, the other a compatible, acid insoluble, film-forming, polymer. The composition, which can be developed positively with dilute aqueous acid or negatively with dilute base, is useful in silk screen printing and as a photoresist composition in general.
    Type: Grant
    Filed: November 20, 1972
    Date of Patent: June 8, 1976
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Larry D. Rich
  • Patent number: 3958996
    Abstract: A photopolymerizable paste composition comprising film-forming solid inorganic particulate material, a polymer binder, unsaturated monomers, and an organic initiator dispersed in a hydrogenated terpene solvent provides a screen printable paste composition compatible with thick-film techniques used for fabricating electrically conductive and dielectric patterns and layers on substrates for electronic circuits.
    Type: Grant
    Filed: May 7, 1973
    Date of Patent: May 25, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harold Kirkwood Inskip
  • Patent number: 3934503
    Abstract: A blank for forming a stencil screen for silk screen or electrostatic stencil printing is disclosed. The screen includes a resilient, high tensile strength, porous substrate such as a monofilamentary nylon or stainless steel 200-mesh screen. A light radiation absorbent, self-combustible, ink-resistant, ink-impervious and tough film is applied to the screen, suitably a combustible black nitrocellulose film or a black cellulose ether film containing finely dispersed nitrate or perchlorate. The film is selectively removed by directly pulsing high-intensity light of over 10 joules per square inch for a short duration of 1 to 50 milliseconds in the form of an image pattern to ignite and completely combust the film only in said areas during the duration of the pulse.
    Type: Grant
    Filed: December 10, 1968
    Date of Patent: January 27, 1976
    Assignee: IIT Research Institute
    Inventors: Layton C. Kinney, Edwin H. Tompkins
  • Patent number: 3934504
    Abstract: To improve the detail on screen printing, in which images are applied to a printing grid or screen in which a photo-sensitive layer is utilized to be exposed in accordance with the image or composition to be printed, and the non-exposed image portions are removed before printing, the screen is pre-processed to provide it with a smooth surface so that the photo-sensitive layer can, itself, be applied on the screen with a smooth surface of uniform and controllable thickness directly over the printing grid; in a preferred form, the interstices of the printing grid or screen are filled with a filler, and the surface of the grid and the filler is then treated to remove that portion of the filler which is above the grid elements, leaving the filler within the interstices, and a smooth surface over which the photo-sensitive layer can be applied.
    Type: Grant
    Filed: April 4, 1974
    Date of Patent: January 27, 1976
    Assignee: Fritz Buser AG., Maschinenfabrik
    Inventor: Martin Klemm
  • Patent number: 3930868
    Abstract: A light-sensitive composition comprising novel arylglyoxyalkyl acrylates that exhibits useful light sensitivity. The basic structure of the new compositions, which may also themselves be polymerized are as follows: ##EQU1## wherein Ar represents an aromatic structure selected from the group consisting of benzene, naphthalene and substituted products of each, R.sub.1 represents an alkyl group having from one to ten carbon atoms, R.sub.2 represents a grouping selected from the group consisting of hydrogen, or a lower alkyl group having from one to five carbon atoms and R.sub.3 represents an alkenyl group having from one to 10 carbon atoms and singular unsaturation. The light-sensitive compositions may themselves be utilized in photochemistry as photopolymers, they may be combined with suitable solvents and additives or polymerized with suitable backbone polymers to provide substances which can be used as light-sensitive coatings.
    Type: Grant
    Filed: May 23, 1973
    Date of Patent: January 6, 1976
    Assignee: The Richardson Company
    Inventors: Thaddeus M. Muzyczko, Donald W. Fieder