For Lithographic Printing Plate Patents (Class 510/171)
  • Patent number: 9683205
    Abstract: Disclose herein are compositions of matter comprising at least one hydrocarbon solvent in between 1-50%, at least one surfactant in between 1-50%, and/or at least one aromatic solvent in between 1-75%. In addition, disclosed herein is a method of cleaning rollers, plates, or blankets of a printing machine with a cleaning mixture, the method comprising contacting the rollers or blankets with the cleaning mixture, wherein the cleaning mixture comprises a hydrocarbon solvent, an aromatic solvent, a methylated siloxane, and a surfactant.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: June 20, 2017
    Assignee: Explorer Pressroom Solutions
    Inventors: Raymond Dabela, Jeffrey L. Rogers
  • Patent number: 9394407
    Abstract: Disclosed are block copolymers of the formula A-B-A (I) or A-B (II), comprising blocks A and B, wherein block A is a hydrophilic polymeric segment comprising polyglycerol and block B is an aromatic hydrophobic polymeric segment. The block copolymers find use as wetting agents in the preparation of porous membranes from aromatic hydrophobic polymers such as polyethersulfone.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: July 19, 2016
    Assignee: Pall Corporation
    Inventors: Hassan Ait-Haddou, Frank Onyemauwa
  • Patent number: 8541353
    Abstract: A novel cleaner and polish formulation that is eco friendly, that is, it is formulated without alcohols, organic solvents and without normal cleaning and polishing components, for example, amine functional materials, that are undesirable with regard to the environment.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: September 24, 2013
    Inventor: John D. Blizzard
  • Patent number: 8530402
    Abstract: A cleaning apparatus comprises a container configured to hold an article to be cleaned, a cleaning solvent dispenser configured to supply a cleaning solvent to the container, an energy generator configured to provide thermal energy to an interior of the container; and a control device in communication with the energy generator and configured to select thermal energy sufficient to sublimate the particles. The cleaning solvent comprises a solvent and nanofabricated particles dispersed therein. The control device controls the energy generator to provide thermal energy to the cleaning solvent in container in which the article is submerged in order to cause sublimation of the particles.
    Type: Grant
    Filed: April 12, 2012
    Date of Patent: September 10, 2013
    Assignee: Empire Technology Development LLC
    Inventor: Takahisa Kusuura
  • Patent number: 8506723
    Abstract: An alkaline detergent composition for hard surface comprises an alkaline agent (component A), a nonionic surfactant (component B), a chelating agent (component C), water (component D), at least one carboxylic acid compound (component E) selected from the group consisting of compounds represented by general formula (1) and general formula (2), and at least one anionic surfactant (component F) selected from the group consisting of surfactants represented by general formula (3) and salts thereof. Therein, the content ratio [component E (weight %)/component B (weight %)] is 1/1.5-15/1, the content ratio [component F (weight %)/component B (weight %)] is 10/1-1/5, and the pH at 25° C. is 12 or greater.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: August 13, 2013
    Assignee: KAO Corporation
    Inventors: Atsushi Tamura, Sadaharu Miyamoto
  • Patent number: 8409360
    Abstract: Problem: To provide a cleaning liquid and a cleaning method having excellent leaning capability. In a process of liquid immersion lithography, they can preventing the damage to be caused by the component released from the photoresist to photoexposure devices; the waste treatment is easy; the efficiency in substitution with the cleaning liquid for the medium for liquid immersion lithography is high, and the production cost is reduced not detracting from the throughput in semiconductor production. Means for Solution: A cleaning liquid to be used for cleaning a photoexposure device in a process of liquid immersion lithography, which comprises at least 5% by mass of a nonionic surfactant containing at least one group selected from an ethyleneoxy group, a propyleneoxy group and a polyglycerin group, and a balance of water; and a cleaning method using it.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: April 2, 2013
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Jun Koshiyama, Jiro Yokoya, Tomoyuki Hirano, Hiromitsu Tsuji
  • Publication number: 20130048033
    Abstract: A method of conditioning the surface of a work piece, in particular of a litho-strip or litho-sheet, consisting of an aluminum alloy enables an increase in manufacturing speed in surface roughening while maintaining a high quality of the electro-chemical grained surface of the work piece with relative low effort related to facility equipment. The method of conditioning comprises at least the step of degreasing the surface of the work piece with a degreasing medium, wherein the degreasing medium contains at least 1.5 to 3% by weight of a composite of 5-40% sodium tripolyphosphate, 3-10% sodium gluconate, 3-8% of a composite of non-ionic and anionic surfactants and optionally 0.5 to 70% soda, wherein sodium hydroxide is added to the degreasing medium such that the concentration of sodium hydroxide in the aqueous degreasing medium is 0.01 to 5% by weight.
    Type: Application
    Filed: September 14, 2012
    Publication date: February 28, 2013
    Applicant: Hydro Aluminium Deutschland GmbH
    Inventors: Bernhard Kernig, Henk-Jan Brinkman
  • Publication number: 20120220511
    Abstract: Disclose herein are compositions of matter comprising at least one hydrocarbon solvent in between 1-50%, at least one surfactant in between 1-50%, and/or at least one aromatic solvent in between 1-75%. In addition, disclosed herein is a method of cleaning rollers, plates, or blankets of a printing machine with a cleaning mixture, the method comprising contacting the rollers or blankets with the cleaning mixture, wherein the cleaning mixture comprises a hydrocarbon solvent, an aromatic solvent, a methylated siloxane, and a surfactant.
    Type: Application
    Filed: August 25, 2011
    Publication date: August 30, 2012
    Applicant: EXPLORER PRESSROOM SOLUTIONS
    Inventors: Raymond DABELA, Jeffrey L. ROGERS
  • Patent number: 8207103
    Abstract: Disclose herein is a composition comprising a hydrocarbon solvent; an aromatic solvent; a methylated siloxane; and a surfactant. Also disclosed is a method of preparing an emulsion for cleaning purposes comprising mixing a solution at a rate of greater than 500 rpm for at least two hours, wherein the solution comprises a hydrocarbon solvent, an aromatic solvent, a methylated siloxane, and a surfactant. In addition, disclosed herein is a method of cleaning rollers, plates, or blankets of a printing machine with a cleaning mixture, the method comprising contacting the rollers or blankets with the cleaning mixture, wherein the cleaning mixture comprises a hydrocarbon solvent, an aromatic solvent, a methylated siloxane, and a surfactant.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: June 26, 2012
    Assignee: Explorer Pressroom Solutions, Inc.
    Inventors: Raymond Dabela, Jeffrey L. Rogers
  • Patent number: 8014881
    Abstract: In a lithographic apparatus, a feedforward transfer function of a control system is determined by: a) iteratively learning a feedforward output signal of the control system by iterative learning control for a given setpoint signal; b) determining a relation between the learned feedforward output signal and the setpoint signal; and c) applying the relation as the feedforward transfer function of the control system. A learned feedforward, which has been learned for one or more specific setpoint signals only, can be adapted to provide a setpoint signal dependent feedforward output signal. The learned feedforward can be made more robust against setpoint variations.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: September 6, 2011
    Assignee: ASML Netherlands B.V.
    Inventors: Mark Constant Johannes Baggen, Petrus Marinus Christianus Maria Van Den Biggelaar, Yin Tim Tso, Marcel François Heertjes, Ramidin Izair Kamidi, Dennis Andreas Petrus Hubertina Houben, Constant Paul Marie Jozef Baggen, Marinus Jacobus Gerardus Van De Molengraft
  • Publication number: 20110046035
    Abstract: A method for treating a lithographic printing plate is disclosed comprising the step of applying a liquid to the plate including an aqueous phase; a solvent phase which is present in the liquid in an amount ?40% wt; and one or more compound (s) having the following formula (I): R1—O—(Y)n?H wherein R1 is a methyl group, an ethyl group, a propyl group or a butyl group; Y represents —CH2—CHR2-0- with R2=hydrogen or an alkyl group and/or mixtures thereof; and n is an integer ?10.
    Type: Application
    Filed: March 24, 2009
    Publication date: February 24, 2011
    Applicant: AGFA-GEVAERT NV
    Inventors: Peter Maessen, Patrick Mertens
  • Publication number: 20100147172
    Abstract: A thickened aqueous cleaning solution for removing residual ink images from the surface of a blanket used in offset lithographic printing which has been subjected to printing using radiation-curable ink. The cleaning solution comprises an alkaline builder, a thickener, a co-solvent, a surfactant and water. A method for removing the residual ink images from the blanket comprises removing the blanket from the offset lithographic printing press, applying a layer of the thickened aqueous cleaning solution to the blanket, rubbing the surface of the blanket, for example with rags or a scouring pad, and removing the soiled cleaning solution.
    Type: Application
    Filed: June 26, 2007
    Publication date: June 17, 2010
    Applicant: ENVIRO IMAGE SOLUTIONS INC
    Inventors: Hugh Daniel McDonald, Hao Wang
  • Publication number: 20100137180
    Abstract: A method for treating a lithographic printing plate including the step of applying a liquid containing a surfactant to the plate, characterized in that the surfactant includes at least one hydrophilic segment including polyglycerol, and at least one hydrophobic segment selected from an optionally substituted alkylene group, an alkyl or aryl substituted poly(meth)acrylate, an optionally substituted polyester, polyether, polyurethane, polycarbosilane, polysiloxane, polystyrene and/or a polymer including a perfluoroalkyl group with the proviso that the liquid is not applied as a fountain solution.
    Type: Application
    Filed: June 10, 2008
    Publication date: June 3, 2010
    Applicant: AGFA GRAPHICS NV
    Inventors: Peter Maessen, Hubertus Van Aert
  • Patent number: 7576046
    Abstract: A cleaning liquid for lithography that exhibits equally excellent cleaning performance for resists of a wide variety of compositions, such as various resists for i-line, KrF and ArF, silicic resist and chemical amplification type positive resist, and that excels in post-treatment dryability, being free from any deterioration of resist performance by cleaning. There is provided a cleaning liquid for lithography, comprising at least one member (A) selected from among lower alkyl esters of acetic acid and propionic acid and at least one member (B) selected from among ketones having 5 to 7 carbon atoms per molecule in a mass ratio of (A):(B) of 4:6 to 7:3.
    Type: Grant
    Filed: December 26, 2005
    Date of Patent: August 18, 2009
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Jun Koshiyama, Yasumitsu Taira, Chima Shinohara
  • Patent number: 7335628
    Abstract: Disclosed is a cleaning composition for removing ink from a variety of surfaces, but more particularly from rubber. The composition has a high evaporation rate, is completely biodegradable, environmentally safe, not harmful to rubber, and has a near neutral pH.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: February 26, 2008
    Inventors: Judson Eric Crump, Peter Kueth
  • Patent number: 7276469
    Abstract: The invention is a cleaning material for cleaning printing machines. The cleaning material is comprised of a fabric that has been impregnated with a cleaning composition having branched chain monobasic and/or dibasic esters that contain 2-ethyl hexanoate. The cleaning composition can also include additional low volatility solvents and surfactants. A particularly useful cleaning composition is comprised of isobutyl stearate in combination with branched chain monobasic and/or dibasic esters that contain 2-ethyl hexanoate. The cleaning material can be wound onto a roll that can be adaptable to fit commercially available printing machine cleaning devices.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: October 2, 2007
    Assignee: Fiberweb Simpsonville, Inc.
    Inventors: Jon A. Howey, Emil Delgado
  • Patent number: 7101832
    Abstract: A cleaning solution for paper making equipment includes a stabilized source of peroxide in combination with a glycol ether solvent system and an alcohol ethoxylate. The peroxide system can be hydrogen peroxide stabilized with a phosphonate such as HEDP. The glycol solvent system may be a propylene glycol ether such as dipropylene glycol methylether or tripropylene glycol methylether. This solution can be formulated with a pH from about 4 to about 12. This is used by recirculating it through a paper making equipment during a shut down procedure.
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: September 5, 2006
    Assignee: JohnsonDiversey, Inc.
    Inventors: Vikram Asher, Robert E. Ebbeler
  • Patent number: 7037882
    Abstract: The invention is a cleaning material for cleaning printing machines. The cleaning material is comprised of a fabric that has been impregnated with a cleaning composition having branched chain monobasic and/or dibasic esters that contain 2-ethyl hexanoate. The cleaning composition can also include additional low volatility solvents and surfactants. A particularly useful cleaning composition is comprised of isobutyl stearate in combination with branched chain monobasic and/or dibasic esters that contain 2-ethyl hexanoate. The cleaning material can be wound onto a roll that can be adaptable to fit commercially available printing machine cleaning devices.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: May 2, 2006
    Assignee: BBA Nonwovens Simpsonville, Inc.
    Inventors: Jon A. Howey, Emil Delgado
  • Patent number: 6951710
    Abstract: Compositions containing certain amines and/or quaternary ammonium compounds, hydroxylamine, corrosion inhibitor, organic diluent and optionally water are capable of removing photoresist, photoresist byproducts and residue and etching residues from a substrate.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: October 4, 2005
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Jennifer M. Rieker, Thomas Wieder, Dana L. Durham
  • Patent number: 6802258
    Abstract: A method for removing ink-accepting areas of a lithographic printing master is disclosed which enables to recycle the lithographic substrate of the printing master. The method comprises after a cleaning step a treatment of the recycled substrate with an aqueous solution having a pH<7.
    Type: Grant
    Filed: December 7, 2001
    Date of Patent: October 12, 2004
    Assignee: Agfa-Gevaert
    Inventors: Eric Verschueren, Joan Vermeersch
  • Patent number: 6786975
    Abstract: A method of cleaning a printhead in an inkjet printer by removing organic debris deposits from the printhead, uses anyone of the liquid mixes of NaOCl (sodium hypochlorite) and H2O (water), H2O2 (hydrogen peroxide) and H2O, Na2S2O4 (sodium hydrosulfite) and H2O, CaCl2O2 (calcium hypochlorite) and H2O, or KMnO4 (potassium pernanganate) and H2O on the debris deposits, to serve as a cleaning agent.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: September 7, 2004
    Assignee: Eastman Kodak Company
    Inventors: Michael Long, Gregory J. Garbacz, Vincent E. Hamilton-Winbush
  • Patent number: 6701843
    Abstract: A method for removing ink-accepting areas of a lithographic printing master is disclosed which enables to recycle the lithographic substrate of the printing master. The method comprises the following step which is preferably carried out on-press: applying a cleaning liquid to the printing master, the cleaning liquid being an emulsion of an organic compound in water, further comprising a compound according to formula (I): wherein X=OH, O−, a polymer backbone.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: March 9, 2004
    Assignee: Agfa-Gevaert
    Inventors: Eric Verschueren, Joan Vermeersch
  • Patent number: 6701842
    Abstract: A process for treating a used or unused printing plate with an erasing composition to clean the printing plate, laser imaging the printing plate with a polymeric substance, and to provide art image thereon, and fixing the image on the printing plate. Further, the printing plate has applied thereto any one of a heat-curable and water-soluble substance, if desired, immediately after the laser imaging, or a water-soluble substance immediately after the laser imaging, followed by warming of the printing plate. The water-soluble substance or the heat-curable and water-soluble substance is washed off using a solution essentially consisting of water before printing.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: March 9, 2004
    Assignee: MAN Roland Druckmaschinen AG
    Inventors: Thomas Hartmann, Josef Schneider
  • Patent number: 6610638
    Abstract: The present invention No. I is to obtain a high purity 3-alkoxy-1-propanol having the content of alcoholic impurities of not more than 0.3% by weight by allowing to react acrolein with a linear or branched alcohol having a carbon number of 1-4 using acrolein having the content of propionaldehyde of not more than 1% by weight as a raw material, a 3-alkoxy-1-propanol is produced by a hydrogenation reaction using hydrogen of a reaction mass under the presence of a catalyst, followed by recovering through a distillation of the 3-alkoxy-1-propanol having the content of alcoholic impurities of not more than 0.3% by weight from a crude solution in the hydrogenation reaction.
    Type: Grant
    Filed: November 30, 2000
    Date of Patent: August 26, 2003
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Hiroto Tanigawa, Hiroto Miyake, Hiroshi Koyama, Akihiko Fujita, Katsuya Maruo
  • Patent number: 6569251
    Abstract: The present invention relates to a cleaner for lithography which is excellent in the ability to dissolve a resist and highly safe to the human body and which can be used usefully to clean a coater such as in a coater cup, to remove an unnecessary resist from a substrate when or after coating of a resist, to remove the resist from the substrate after the object using the resist was achieved, and to clean and rinse the substrate after removal of the resist. The cleaner for lithography comprises a homogeneous solution of at least one organic solvent selected from the group consisting of propylene glycol alkyl ether, propylene glycol alkyl ether acetate, ethylene glycol alkyl ether, ethylene glycol alkyl ether acetate, acetic acid alkyl ester, propionic acid alkyl ester, alkoxypropionic acid alkyl ester, lactic acid alkyl ester, aliphatic ketone, and alkoxybutanol and at least one selected from alcohols having alkyl group with 1 to 4 carbon atoms.
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: May 27, 2003
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Takashi Takeda
  • Patent number: 6569260
    Abstract: A water-based formulation for the removal of ink comprising a detergent builder including sodium carbonate, neutralized polyacrylic acid, and an acrylic acid/maleic anhydride copolymer; a chelating agent including tetrasodium ethylenediaminetetraacetate and ethylenediaminetetraacetic acid; and a detergent/emulsifier including C9-11 Pareth 8, C6-12 Pareth 6, and PEG Cocomonium Chloride.
    Type: Grant
    Filed: June 19, 2002
    Date of Patent: May 27, 2003
    Assignee: Microblend, LLC
    Inventor: Keith A. Rhodes
  • Patent number: 6525008
    Abstract: A cleaning medium for use in cleaning printing forms includes either an acid solution having a pH of from 1 to 4 or a basic solution having a pH of from 10 to 14. A dispersible abrasive agent in a concentration of from 1 to 15 grams per 100 grams of the cleaning composition, a surfactant in a concentration of from 1 to 50 grams per 100 grams of the cleaning composition, an organic solvent in a concentration of from 10 to 50 grams per 100 grams of the cleaning composition, and additional water if needed are added to the acid or basic solution to form the cleaning medium. A cleaning medium in concentrate form is also provided.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: February 25, 2003
    Assignee: MAN Roland Druckmaschinen AG
    Inventors: Thomas Hartmann, Hans-Christoph Beltle, Andrea Fuchs, Roland Dietrich
  • Patent number: 6440914
    Abstract: The invention concerns a liquid de-inking composition comprising at least a surfactant of polyalkoxylated terpenic origin of formula: Z—X—W—[CH—(R5)CH(R6)-O]q—A wherein: Z is a bicycloheptenyl or bicycloheptyl radical, preferably substituted by methyl radicals; X is preferably a —CH2—CH2—O— or —O—CH2—CH2—O— radical; W is a polysequence, preferably polyoxypropylene and polyoxyethylne sequence; [CH(R5)—CH(R6)—O]q is a sequence different from a polyoxyethylene, preferably polyoxypropylene sequence; A is a hydrogen atom, a hydrocarbon or functional group. Said composition can be used for de-inking paper.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: August 27, 2002
    Assignee: Rhodia Chimie
    Inventor: Marie-Odile Lafon
  • Patent number: 6346156
    Abstract: A process for removing printing inks and/or oil residues located on a surface of a printing apparatus comprising: (a) contacting the printing inks and/or oil residues located on the surface of the printing apparatus with a cleaning composition containing an alkyl polyglycoside corresponding to formula (I): R(G)x  (I)  wherein R is a linear saturated alkyl radical having from 8 to 22 carbon atoms, and (G)x is a glycoside or oligoglycoside radical having a degree of oligomerization, x, of from 1 to 10 to form a printing ink and/or oil residue emulsion; and (b) removing the printing inks and/or oil residue emulsion from the surface of the printing apparatus.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: February 12, 2002
    Assignee: Cognis Deutschland GmbH
    Inventor: Matthias Fies
  • Publication number: 20010008877
    Abstract: A cleaning medium for use in cleaning printing forms includes either an acid solution having a pH of from 1 to 4 or a basic solution having a pH of from 10 to 14. A dispersible abrasive agent in a concentration of from 1 to 15 grams per 100 grams of the cleaning composition, a surfactant in a concentration of from 1 to 50 grams per 100 grams of the cleaning composition, an organic solvent in a concentration of from 10 to 50 grams per 100 grams of the cleaning composition, and additional water if needed are added to the acid or basic solution to form the cleaning medium. A cleaning medium in concentrate form is also provided.
    Type: Application
    Filed: December 21, 2000
    Publication date: July 19, 2001
    Applicant: MAN Roland Druckmaschinen AG
    Inventors: Thomas Hartmann, Hans-Christoph Beltle, Andrea Fuchs, Roland Dietrich
  • Patent number: 6261381
    Abstract: A composition and process for cleaning inks and organic residues from various substrates utilizing dimethyl piperidone and other safe solvents is revealed. The composition and process are particularly useful in cleaning printing plates and printing apparatus.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: July 17, 2001
    Assignee: MacDermid, Incorporated
    Inventor: Gerald Wojcik
  • Patent number: 6191084
    Abstract: A composition for cleaning a print roller such as an anilox roller includes a soap or cleansing agent having a plurality of grit particles, an organic acid, an emulsifier, and water. A solvent is mixed with the cleansing agent to complete the composition. A method of utilizing the cleaning composition includes providing the composition, selecting an applicator, and mixing the composition. The method then includes wiping the composition repeatedly over the print roller using the applicator until the surface and plurality of cells in the roller surface are substantially free of dried ink and other contaminants.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: February 20, 2001
    Assignee: LBL Enterprises, LLC.
    Inventor: Lee A. Christianson
  • Patent number: 5948740
    Abstract: A composition for cleaning an anilox roller includes a small amount of ammonium chlorides, a plurality of silica particles, a sulfonicacid, a nonoxynol, water, and an isopropyl acetate making up the remaining portion of the composition. A method of utilizing the cleaning composition includes selecting an applicator, applying the composition to the anilox roller, wiping the anilox roller with the applicator until the surface and the cells of the anilox roller are substantially free of dried ink and other dried or hardened substances.
    Type: Grant
    Filed: September 11, 1998
    Date of Patent: September 7, 1999
    Assignee: LBL Enterprises LLC
    Inventor: Lee A. Christianson
  • Patent number: 5863710
    Abstract: Proposed is an aqueous alkaline developer solution used in the development treatment of a photoresist layer, especially, formed on an aluminum surface of a substrate. Different from conventional aqueous alkaline developer solutions which attack the aluminum surface in the development treatment to cause discoloration or corrosion, the inventive developer solution is free from such troubles by virtue of the specific formulation including, besides 2 to 10% by weight of tetramethylammonium hydroxide as the effective developing ingredient, 20 to 50% by weight of a polyhydric alcohol which is preferably glycerin.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: January 26, 1999
    Assignee: Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Kazumasa Wakiya, Masakazu Kobayashi, Toshimasa Nakayama
  • Patent number: 5858940
    Abstract: A hardened image is removed from printing plates by a solution of formic acid and hydrofluoric acid. In one embodiment, the solution further includes a buffer solution to maintain the oleophilic properties of the substrate for printing.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: January 12, 1999
    Inventor: James L. Orcutt
  • Patent number: 5814163
    Abstract: The present invention concerns a mixture of at least one monoester, at least one methyl ester, at least one olefinic hydrocarbon, along with other optional ingredients, which mixture is useful in cleaning organic residues, particularly inks, from various surfaces.
    Type: Grant
    Filed: September 9, 1996
    Date of Patent: September 29, 1998
    Assignee: MacDermid, Incorporated
    Inventor: Gerald Wojcik
  • Patent number: 5691288
    Abstract: A composition for finishing, preserving and cleaning lithographic printing plates which is composed of a polyol having a molecular weight in the range of from about 50 to about 3,000; a starch or dextrin hydrophilic film former; an alkyl benzene sulfonate amine salt; a composition of hydrocarbons containing less than about 10% aromatics and having a boiling point in the range of 175.degree. F. to 500.degree. F. and a flash point of above 100.degree. F.; a hydrogen, isooctyl, nonyl, decy or dodecyl substituted phenoxypoly(oxyethylene) ethanol surfactant having an HLB of 8 to 15; a C.sub.12 to C.sub.20 alcohol; mono-, di- or tri- ethanolamine; an organic or inorganic acid and water. The optional inclusion of a buffer salt and bacteriostat is preferred.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: November 25, 1997
    Assignee: Bayer Corporation
    Inventor: Major S. Dhillon
  • Patent number: 5602089
    Abstract: A method and composition for clean up of an oil based composition using an aqueous solution. The clean up composition includes 5-60% by weight of a solubility controlling component exhibiting pH dependent water solubility behavior and 30-95% by weight of a diluent. The method includes applying the clean up composition to the oil based composition and cleaning the same with an aqueous solution having a wash pH falling within the pH levels at which the solubility controlling component is water washable.
    Type: Grant
    Filed: March 8, 1995
    Date of Patent: February 11, 1997
    Assignee: Deluxe Corporation
    Inventor: Thomas J. Pennaz