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| Number | Title | Issue Date |
| 5021324 | Printing plate protectant A composition useful for the protection of actinic light-exposed presensitized lithographic printing plates. The composition contains an effective amount of the di-potassium salt of hydroxyethylidene diphosphonic acid dissolved in water. The composition i... | 06/04/1991 |
| 4960663 | Persistent photoconductive coating composition A persistent photoconductive coating composition contains a persistent photoconductor, photoinitiator, an acetate or phenolic hydroxyl containing resin and ketone dispersed in an inert coherent matrix.... | 10/02/1990 |
| 4868075 | Electrophotographic imaging process An electrophotographic imaging process. The process utilizes a disposable photoconductor and develops the photoconductor in fresh toner. The toner is packaged in a pod to protect its freshness and dispense a predetermined quantity of toner. The toner cont... | 09/19/1989 |
| 4822861 | Method for the preparation of polyvinyl phosphonic acid A process for preparing polyvinyl phosphonic acid by the steps of polymerizing bis(2-chloroethyl) vinyl phosphonate in the presence of a free radical initiator or catalyst, such as dicumyl peroxide. The resulting poly bis(2-chloroethyl) vinyl phosphonate ... | 04/18/1989 |
| 4758497 | Photosensitive naphthoquinone diazide sulfonyl ester compounds for the fabrication of lithographic plates and photosensitive sheet construction with the compounds The invention features a new series of triazine compounds which are characterized by their ability to generate free radicals upon irradiation in a desired optical region, such that they are useful in the fabrication of lithographic plates having improved ... | 07/19/1988 |
| 4735696 | Method of electrolytically graining aluminum metal sheets suitable for lithographic plate supports A method for producing aluminum sheets for lithographic plates by electrolytically etching the surface in an aqueous mineral acid electrolyte solution utilizing direct current with superimposed alternating current. The surface of aluminum plate sheets may... | 04/05/1988 |
| 4721552 | Two-step method for electrolytically graining lithographic metal plates An all electrolytic method for quickly and efficiently producing a well roughened, substantially non-directional, fine honeycomb surface on an aluminum sheet which is characterized by excellent adhesion to coatings and therefore suitable for making lithog... | 01/26/1988 |
| 4721665 | Method for neutralizing acidic novolak resin in a lithographic coating composition The invention features a lithographic composition fabricated from a process wherein an acidic novolak resin is neutralized in solution. The solution comprises a common compatible solvent with the other ingredients of the coating composition, such as a pos... | 01/26/1988 |
| 4576892 | Photosensitive materials A presensitized plate adapted for use in lithography comprising a support member with a metal surface, e.g. aluminum metal, and overlying layer containing a diazo compound. In accordance with this invention, the relative exposure sensitivity of the diazo ... | 03/18/1986 |
| 4568628 | Water developable diazo printing plate composition with quaternary nitrogen stabilizer A water developable printing plate is provided with a photopolymerizable system as a latex comprising a water soluble diazopolymer reaction product of a diazoaryl amine and an aldehyde and an aqueous cationic or nonionic dispersion of a water insoluble po... | 02/04/1986 |
| 4568630 | Method for preparing and using an anodized aluminum photo-lithographic printing plate A method of preparing an anodized aluminum printing plate comprising treating the aluminum support with aqueous solution of a condensed aryl sulfonic acid having a neutral pH, anodizing the support before or after the treating step, and coat, radiation ex... | 02/04/1986 |
| 4559401 | Process for preparing chromophore-substituted vinyl-halomethyl-s-triazines An improved method for the preparation of chromophore-substituted vinyl-halomethyl-s-triazines especially 2-(p-methoxystyryl)-4,6-bis-(trichloromethyl)-s-triazine. In the known preparation of these compounds, a two step procedure is utilized wherein ... | 12/17/1985 |
| 4545875 | Electrolytic graining The invention features an electrolytic process for producing lithographic plates. The plates are immersed in a bath and fed a shaped alternating wave having a multiplicity of zero voltage intermissions. The grain topography of the plate can be varied by c... | 10/08/1985 |
| 4524125 | Chemical etching of lithographic aluminum substrate The method of production of lithographic aluminum substrates which comprises first mechanically graining a surface of an aluminum sheet to obtain a pumice grained surface and then etching with a hot sulfuric acid (10-90%) solution.... | 06/18/1985 |
| 4486518 | Duplicating film mask with radiation absorbing benzophenone in processed positive-working radiation sensitive layer on transparent substrate A non-silver, positive-working, essentially alkali-insoluble, radiation-sensitive composition, which becomes alkali-soluble on exposure to radiation, comprising a non-silver, positive-acting, essentially alkali-insoluble radiation-sensitive component a ra... | 12/04/1984 |
| 4483758 | Method for making a negative working lithographic printing plate An O-epoxyalklyated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid can be combined with an aqueous alkali- and radiation ... | 11/20/1984 |
| 4483913 | Planographic printing plate An improved planographic printing plate comprised of a metal substrate, a sealing layer, an interlayer formed from a monomer or polymer of an organic compound having at least one cationic, quaternary sustituted ammonium group, and a photosensitive layer o... | 11/20/1984 |
| 4477317 | Aluminum substrates useful for lithographic printing plates A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises first mechanically graining at least one surface of an aluminum sheet to obtain a pumice grained surface of the aluminum sheet, and... | 10/16/1984 |
| 4467028 | Acid interlayered planographic printing plate A planographic printing plate comprises an anodized metal substrate, an interlayer on the substrate and a photosensitive layer on the interlayer in which the interlayer is a hydroxy-substituted organic acid.... | 08/21/1984 |
| 4447512 | Method for making a negative working lithographic printing plate An O-epoxyalklyated tetrakis (hydroxyphenyl) alkane resin or the esterified reaction product of about one equivalent thereof with less than one equivalent of an ethylentically unsaturated organic acid can be combined with an aqueous alkali- and radiation ... | 05/08/1984 |
| 4446221 | Anodized supports and radiation sensitive elements therefrom An improved anodized support material comprising an anodized support material which has been treated with an alkali metal salt of a condensed aryl sulfonic acid following or during anodization; an improved radiation sensitive element comprising the above ... | 05/01/1984 |
| 4418134 | Aqueous composition-sensitive photoconductive composition An aqueous composition-sensitive photoconductive composition useful in the preparation of aqueous composition decoatable electrophotographic elements, such elements and low cost lithographic printing plates prepared from said elements the aqueous composit... | 11/29/1983 |
| 4406757 | Anodization method In the method of electrolytically treating a lithographic-grade aluminum web by liquid contact in a sulfuric acid electrolyte, the improvement which comprises carrying out said treatment in the presence of an iridium oxide plated titanium metal anode.... | 09/27/1983 |
| 4391894 | Colored photosensitive composition A method for preparing a substantially uniformily dyed photosensitive composition useful in the reprographic arts, and compositions useful therefor. A water soluble basic dye is reacted with an organic acid, or an ammonium or alkali metal salt thereof whi... | 07/05/1983 |
| 4379830 | Developer for positive photolithographic articles An improved aqueous alkaline developer for imagewise-exposed positive-acting photolithographic articles comprising a basic substance wherein the improvement comprises addition of a neutral salt of an alkali metal cation to the developer.... | 04/12/1983 |
| 4348471 | Positive acting composition yielding pre-development high visibility image after radiation exposure comprising acid free novolak, diazo oxide and acid sensitive dyestuff A colored, positive-acting, radiation-sensitive composition whose color is extinguished or greatly decreased in intensity upon irradiation comprising at least one acid-free resin, at least one acid-sensitive dyestuff and at least one positive-acting compo... | 09/07/1982 |
| 4347300 | Imaging peel apart element employing two photohardenable layers This invention relates to novel photosensitized sheet constructions which, upon exposure to an energy source through a screened image, can accurately and simultaneously reproduce said image in both its negative and positive forms.... | 08/31/1982 |
| 4340657 | Novel radiation-sensitive articles Photopolymerizable compositions comprised of (I) novel polymers which are substantially comprised of the reaction products of (A) organic polyisocyanates and (B) organic compounds containing at least about two active hydrogen atoms per molecule, said poly... | 07/20/1982 |
| 4334758 | Plate processor An improved apparatus for developing offset printing plates is disclosed, in which the soaker plates defining the developing chamber between them comprise textured stainless steel and are oriented at an angle to the horizontal, their upstream ends being h... | 06/15/1982 |
| 4326018 | Lithographic printing plate An improved lithographic printing plate prepared by exposing a lithographically suitable photosensitive sheet material through a mask or transparency, to radiation, developing the exposed sheet to remove unexposed light sensitive material and post-curing ... | 04/20/1982 |
| 4326020 | Method of making positive acting diazo lithographic printing plate Described is a lithographic element which may optionally be used as a positive working or a negative working element by minor changes in exposure and development parameters.... | 04/20/1982 |
| 4324841 | Lithographic substrates A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises mechanically graining the surface of an aluminum sheet, subsequently finely graining the mechanically grained sheet in a saturated ... | 04/13/1982 |
| 4305854 | Radiation curable pressure sensitive adhesive A pressure sensitive adhesive formed by exposure of a mixture comprising (I) a liquid, substantially water-insoluble monomeric composition, containing zero percent free isocyanate groups, which comprises the reaction product of (i) one equivalent of an is... | 12/15/1981 |
| 4299907 | Storage stable photosensitive diazo lithographic printing plates Storage stable lithographic printing plates employing novel light sensitive, high molecular weight diazo polymers are herein provided. The novel diazo polymers of the instant invention have the generic formula: ##STR1## Where R is methyl or hydrogen ... | 11/10/1981 |
| 4289838 | Diazo-unsaturated monomer light sensitive compositions Improved compositions comprising solvent-soluble, negative-acting or positive-acting light-sensitive diazonium compounds and solvent-soluble unsaturated monomers which are the products of about two equivalents of an organic diisocyanate with about one equ... | 09/15/1981 |
| 4269680 | Curable polymeric composition comprising natural or synthetic rubbers Photopolymerizable compositions comprised of (I) novel polymers which are substantially comprised of the reaction products of (A) organic polyisocyanates and (B) organic compounds containing at least about two active hydrogen atoms per molecule, said poly... | 05/26/1981 |
| 4264384 | Method and article for electrically splicing web ends Provided is a method and apparatus for maintaining electrical conductivity between the ends of spliced metallic webs during surface treatment operations.... | 04/28/1981 |
| 4242417 | Lithographic substrates A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises mechanically graining the surface of an aluminum sheet, subsequently finely graining the mechanically grained sheet in a saturated ... | 12/30/1980 |
| 4233390 | Lithographic printing plate having dual photosensitive layering A method for preparing aluminum based lithographic printing plates which comprises treating at least one surface of an aluminum base sheet with lithographically suitable, photosensitive, preferably water-soluble, diazo composition and then applying to sai... | 11/11/1980 |
| 4217242 | Process for preparing an improved anti-oxidant gum composition for lithographic plates Provided is a process for preparing an improved gum formulation useful for preventing oxidation in exposed and developed lithographic printing plates. The gum so produced exhibits reduced foaming and air entrapment properties.... | 08/12/1980 |
