Abstract: An elastic rotatable member usable for image fixing includes an elastic layer having a roughened surface, a resin layer formed by applying a liquid resin on the surface of the elastic layer and heating it up to a temperature not lower than its crystalline melting point and then quickly cooling it, wherein the resin layer has a side near the elastic layer, having a number of fine concave and convex portions, and wherein the convex portions are in concave portions of the surface of the elastic layer, and the concave portions of the resin layer is pressed by the convex portions of the elastic layer.

Abstract: A multicolor half-tone image of an original object is formed on preformed plastic containers or other recipient surface by printing such image while wet from an offset blanket cylinder on which the image is formed by overlying a plurality of one-color half-tone images.

Abstract: A laminated printing blanket having compressible and resilient properties and a method for its production are provided. The compressible characteristics are provided by disposing an intermediate layer having substantially uniformly distributed voids of substantially uniform size between the base layer and the surface layer of the printing blanket. The voids of the compressible intermediate layer are formed by introducing microcapsules into an elastomeric compound formulated for production of the intermediate layer, and by vulcanizing the intermediate layer at a temperature below the melting point of the microcapsules to a degree sufficient to fix the microcapsules in place within the structure of the intermediate layer. A final vulcanizing step completes the curing of all layers to produce a laminated unitary blanket.

Abstract: A process is described for cementing together the edges of photopolymerizable flexographic printing elements for printing plates that contain as an elastomeric binder a block copolymer whose polymer blocks are polystyrene and polyisoprene and/or polybutadiene or their copolymers.

Abstract: A printing blanket construction and method and apparatus for making the same are provided, the blanket construction comprising an outer layer formed mainly of polymeric material and having an outer printing surface for carrying liquid printing ink or the like for printing purposes or the like, the outer printing surface having a plurality of separate ink wells interrupting the same in a closely spaced apart generally uniform pattern thereof throughout substantially the entire printing area thereof and with a relatively large number of the wells each having a mouth opening at the printing surface that has a substantially straight-line length across the largest portion thereof of approximately 3 microns to approximately 65 microns.

Abstract: A belt or band for machines such as xerographic for feeding, transporting, separating or sorting materials comprising an endless flexible elastomeric belt having a layer of stretch fabric to improve the resistance to flex cracking of said belt.

Abstract: A spall shield for armor plate for restraining at least a portion of flying fragments resulting from impact of a projectile with said armor plate, comprises a plasticized resin of the type commonly used as an interlayer of safety plate glass such as for example, plasticized polyvinyl acetal resin or plasticized polyvinyl butyral resin. The novel spall shield replaces nylon cloth, rubber, felt or resin impregnated glass fabric of the prior art while being at least as thin and light as the adhesive commonly used to adhere such prior art spall shield materials to the armor plate. The spall shield of the present invention is substantially lower in weight and substantially more efficient in performance than conventional spall shields.

Abstract: Method and means are disclosed for producing an improved vacuum blanket with a pattern of air-flow passages that is formed on the underside surface of the air-impervious blanket using conventional printing techniques. The blanket forms an air-tight seal over and around the perimeter of a glass exposure plate, and residual air may be evacuated from beneath the blanket through porous regions beyond the edges of the glass exposure plate.

Abstract: An improved makeready packing for preventing corrosion of cylinders of offset or lithographic printing presses which comprises providing a cylinder surface contacting packing element having a corrosion inhibitor applied thereto in such a manner that the inhibitor will effectively protect the entire surface of the cylinder.

Abstract: The present invention relates to a fibrous material for coating supercalender rolls to improve the resistance to scorching, the fibrous material containing conventional fibers in combination with carbon fibers. An improved heat dissipation inside the roll is achieved without loss of physical properties of the roll coatings. A small percentage of lampblack can also be added to the fibrous material. The invention also relates to an improved elastic supercalender roll which is coated with such a fibrous material.

Abstract: To draw off electrostatic charges which build up on rubber blanket cylinders having a coating of insulating or semiconductive material thereon, the pad or underlay (4) beneath the rubber blanket (5) has an electrically conductive layer (6), for example by sprayed-on aluminum, applied thereon. The end portion (B) of the pad is drawn into the groove (2) of the cylinder (C) in a region which does not have an insulating coating (3) thereon, so that the electrically conductive layer (6) is electrically connected with the cylinder (C) in the region (A) of the cylinder groove. The cylinder, typically of steel, is connected to ground or chassis through its holding structure, frame and gearing.

Abstract: A sheet material for mounting flexible printing plates to the drum of a printing press includes a base film, a flexible foam uniformly coated on the base film, and a pressure sensitive adhesive coated on both the base film and the foam. The cohesion of the base film and the foam, the adhesion of the base film to the foam, and the adhesion of the adhesive to the base film and the foam is greater than the adhesion of the adhesive to the flexible printing plate and to the drum of a printing press. When the sheet material is removed from the printing plate and the drum, the foam, the base film, and the adhesive remain an integral sheet. A method for preparing and using the sheet material is also disclosed.

Abstract: A felt for paper manufacture and the method for producing the felt. At least two fabrics having a single weave or double combination weave structure are piled to form a ground fabric. A lap is fed on the ground fabric and the lap and fabrics of the ground fabric are combined with each other by needling.

Abstract: A laminated printing blanket having compressible and resilient properties and a method for its production are provided. The compressible characteristics are provided by disposing a compressible intermediate layer having voids, between a base ply and a surface layer. The voids in the intermediate layer are produced by dispersing a blowing agent in an elastomer, sandwiching the elastomer containing the blowing agent between two fabric layers, and activating the blowing agent to produce voids. By activating the blowing agent before disposing the intermediate layer between the base ply and the surface layer, the gases from the blowing agent are prevented from migrating to the base ply or to the surface layer.

Abstract: A method of making-up offset printing cylinders having lock-ups positioned in gaps in the cylinders by use of a two piece system involving adhering a compressible printing element to the cylinder with at least one edge extending into the lock-up gap, trimming the edge extending into the lock-up gap, thereafter pulling a non-compressible printing element carrying the printing ink indicia receptive working surface taut over the compressible printing element and securing the ends of the non-compressible printing element in the lock-up under tension. The two piece system involves separating the relatively thick compressible portion of the offset printing blanket from the relatively thinner ink transfer surface of the offset printing blanket. Also a separate embodiment with pressure sensitive adhesive securing the two piece system together and not limited to offset printing cylinders, product and method.

Abstract: A thin coating of poly(isobutylene) is applied to the edge of a record turntable to prevent the record on the turntable from slipping during acceleration and deceleration of the turntable for playback.

Abstract: A laminated vibration isolation pad comprising first or top rigid layer of ultra-high molecular weight polyethylene material, a second layer of vulcanized elastomeric material with an additional third or bottom layer of spaced resilient vulcanized elastomeric projections. The laminated vibration isolation pad is fabricated as a unitary structure with the polyethylene layer bonded or fused to the rubber layer while being formed.

Abstract: A multi-layer printing blanket having a reinforcing section as a substructure which is composed of one or more fabric layers with rubberized layers disposed therebetween, and having a cover which can include a compression layer, a fabric layer, and a top or cover layer. A thin rubberized coating is worked-in on that side of the reinforcing section remote from the cover. This rubberized coating is composed on the basis of such a rubber type which is as swell-resistant as possible against water, conventional solvents, and colors or inks employed in connection with the printing blanket.

Abstract: This invention relates to a flexible article comprising rubberlike body having a surface hard film, e.g., a hose, a handrail, a belt or a diaphragm, wherein a fiber layer comprising non-woven or woven fabrics is positioned between the surface hard film and the rubberlike body by use of an adhesive to eliminate generation of the so-called joint cracking phenomenon, i.e., extension of cracking to the rubberlike body accompanying cracking at the hard film caused by any shock.

Abstract: A fabric for use in the manufacture of rubberized composite sheeting suitable for use as printing blankets, is composed of a rigid warp knitted structure of fine man-made filament yarns A, an inlaid warp of smooth, coarse man-made filament yarns B and C, and a weft insertion of coarse textured man-made filament yarns D. The warp inlay and weft insertion do not interlace, so that a very flat and smooth surfaced fabric is achieved. The fabric may be rubberized by conventional techniques.

Abstract: An improved method of producing a compressible layer to be utilized for a blanket for printing operation is disclosed, wherein the improvements are that the method comprises the steps of adding to elastomer compound of oil resistant polymer pulverized material which is dissolvable in effluent, placing the elastomer compound over a base fabric in the form of a layered structure, and subjecting to vulcanization and then immersing it in the effluent at a predetermined temperature for a certain period of time. To improve compressibility one or more another compressible layers are preferably placed over the early prepared compressible layer with adhesive agent interposed therebetween so as to form an integrated structure.

Abstract: A method of preparing a letterpress printing plate from a liquid photopolymer using an air knife to etch out the unpolymerized liquid to leave the relief image. A new printing plate substrate is used that has a laminae that is paper and a lamina that is a sealing coat on the paper. The paper is a special paper known as tag stock that is 5 to 20 mils thick, has tensile strengths of at least 30 pounds per inch in width in the press direction and at least 20 pounds per inch in width in the cross press direction, and fibers that are independently colored with a dark color having a good light absorption/reflectivity ratio.

Abstract: A compressible printing element that has a thermosol lamina. A thermosol is a thermosetting plastisol, preferably a polyvinyl chloride plastisol containing dioctyl phthalate as a plasticizer and having a di- or tri-acrylate monomer that crosslinks therewith to form a thermoset material preferably in the presence of a peroxide free-radical initiator activated by heat. A phenolic resin is preferably included in the thermosol. The thermosol lamina is resilient and adhered to a compressible lamina, preferably one that is highly porous.

Abstract: A blanket for offset printing comprises three layers, namely, a substrate, a rubber layer and an outer layer. The outer layer is formed by applying to the rubber layer an urethane type resin having aluminum powder mixed therein, and the aluminum powder produces an unevenness in the surface of the outer layer which controls the ink transferring ability of the blanket.

Abstract: An ink transfer device comprising an ink transfer surface layer which may be connected to a porous ink storage body, such as used in a printing device or apparatus, having a porous structure with continuous pores therein and 8 to 30% porosity, and a surface ruggedness of less than 20 microns and ink mobilizable and storable porous ink storage body. The structure of the ink transfer surface layer and the ink storage body are produced respectively and successively by heat compression in a mold, thermoplastic powder of less than 50 microns diameter and of a little larger than the former ones. The inventive ink transfer surface layer enables uniform and efficient transfer of ink from the device even after repeated impressions of the device.

Abstract: A sheet-guiding foil as a sheath for an impression cylinder in rotary offset perfecting presses, one surface of the foil being smooth while the opposite surface thereof is formed with spherical calottes of equal height and of statistically uniform distribution, including a chemically resistant, wear-resistant and rigid backing layer with good ink transfer behavior and a textured surface, and a thin chromium layer applied thereto for evening out microroughness, and the method of production.

Abstract: A high-elasticity dewatering felt for use in e.g. papermaking and cellulose machines wherein the elastic properties of the felt are obtained by admixture thereinto of high-molecular thermoplastic elastomer materials, alternatively high-molecular cross-linked urethane-based elastomer materials, which elastomer materials are capable of stretching to at least twice their original length and subsequently, after relief of the load thereon, rapidly return to substantially their original length.

Abstract: A new resilient compressible printing element having a rubber layer with foamed closed cells therein. The closed cells are formed by the use of blowing agents which are activated and foam the material while an external pressure is applied to the material to restrict expansion.

Abstract: A document feeding belt for the use of an automatic document feeding apparatus in that at least two layers one of which is an internal layer composed of flexible material and the other is an external layer composed of flexible material that is hard to be stained, are used.

Abstract: A cushioned printing plate laminate comprising a face layer of plain gum compound on the front of which are formed raised printing elements, and a cushioned layer of foamed gum compound on the back of the face layer. The laminate may include a face layer and a cushion layer simultaneously cured along with the cushion layer being foamed as an incident to the curing.

Abstract: A method of making a microporous elastomeric material having interconnecting cavities and which may be used as an ink dispensing article is provided wherein such material is made by the steps of admixing fibrous material and particles of hydrated magnesium sulfate in an elastomeric matrix material, shaping the material, curing the elastomeric matrix material, simultaneously causing liberation of water of crystallization from the hydrated magnesium sulfate which provides a blowing effect resulting in the formation of interconnecting passages between the particles from the cured material.

Abstract: The present invention relates to a pad capable of high liquid retention and capable of self-metering of liquid from the pad upon application of pressure. Such pads are highly desirable in lubricating applications and serve well as printers and ink reservoir for computers, markers and printing machines. The process comprises mixing a void former, typically a non-reactive salt of a size range chosen between 2 and 450 microns with a polymeric material in a weight ratio of 2.5:1 to 10:1 salt to polymer. The polymer is heated and the salt dispersed therein to form a salt-polymer composite. The composite is fed to an extruder and extruded to a desired shape, a dense skin being formed on the surface of the extruded polymer. Subsequently, the extruded polymer is cut, the salt is leached from the polymeric matric with a suitable solvent, and the leached extruded polymeric matrix is dried. The skin layer has narrower channels and a lower void volume than the adjacent reservoir column.

Abstract: A screen printing blanket having two transverse stiffening plys of polyester rods spaced fron one another across the neutral plane. The rods are preferably monofilaments of polyethylene terephthalate. For less desirable practicing of the invention only one layer of the preferred rods need be used and in other embodiments other rod materials may be used and in yet other embodiments the invention may be extended to two spaced plys not bridging the neutral plane and even to non-printing blanket belts.

Abstract: An adhesive printing blanket including rubber or rubber-like material. The printing blanket may also be provided with reinforcing inserts. A foil-like protective layer covers the adhesive layer of the printing blanket. The protective layer, which is elastically flexible, is removed by pulling off prior to the adhesive mounting of the printing blanket. The protective layer is under a tensile stress to preclude creasing during rolling up of the printing blanket into a roll and during subsequent spreading out of the printing blanket into a plane.

Abstract: The invention relates to a composite printing blanket formed by a multi-ply printing blanket and at least one multi-ply supporting blanket each being immovably laminated to each other but being relatively slidable or shiftable at an interface therebetween whereby high quality printing is maintained and replacement costs are minimized due to the necessity of disgarding only the multi-ply printing blanket when replacement is dictated.

Abstract: The present invention provides an improvement in the manufacture of laminates containing a rubber surface and particularly to a method of preparing printing blankets for the printing industry wherein the top or printing layer comprises a substantially void-free fluoroelastomer. The improved method of preparing the printing blankets of the invention comprises preparing a composite of a fibrous or pressure sensitive adhesive backing material; a layer of a foamable and cross-linkable elastomeric material over the backing material; a second fibrous material over the layer of foamable material; a top layer of a non-foamable cross-linkable elastomeric material over said second layer of fibrous material; and molding the composite at an elevated temperature under pressure. The improved process of the present invention provides a compressible printing blanket having a top layer surface which not only is substantially void free but also is substantially free of surface irregularities.

Abstract: This invention relates to a composition comprising a blend of a copolyester, a polyisocyanate and a compatible organic polymer, the ratio by weight of polyester to polymer being within the range of from about 20 : 1 to 0.5 : 1 by weight. The invention also relates to a laminate including the novel composition.

Abstract: An impact and energy absorbing mat is produced by extruding sheets of resilient compressible foamed polymeric resin sheets, preferably of a foamed ionomer, and having self formed skins on opposite faces. The sheets are stacked and the stack sliced along planes perpendicular to the sheets by hot wires to fuse the borders of contiguous sheets and form individual coherent slabs. Each slab is sandwiched between preferably similar polymeric resin films which are heated by hot plates to fuse the films to the slab surfaces and further fuse the skin borders to each other. Alternatively, the films may be omitted and self skins formed by the hot plate. The resulting mat includes side by side narrow foamed resilient resin strips having side skins, the borders of contiguous skins being fused to each other and the joined strips having their opposite faces covered by self or film formed skins fused thereto. The mat possesses unexpected superior energy and impact and other desirable properties.

Abstract: A disposable sheet to replace the rubber blanket of an offset printing machine basically consists of a flexible carrier sheet and a coating on one face of the sheet consisting essentially of a cellular latex of a synthetic elastomer free from inorganic fillers in more than incidental trace amounts and deriving its capability of receiving an inked image from partial cross linking.

Abstract: Lithographic masters for improved image quality in direct printing process are provided. The masters are formed with a relatively soft elastomeric or resilient layer on a suitable supporting master substrate. An image layer of up to 2.5 microns is supported by the resilient layer. A resilient blanket supports the printing master or receiver sheet.

Abstract: Lithographic masters for improved image quality in direct printing process are provided. The masters are formed with a relatively soft elastomeric or resilient layer on a suitable supporting master substrate. An image layer of up to 2.5 microns is supported by the resilient layer. A resilient blanket supports the printing master or receiver sheet.

Abstract: A method of continuously making a printing blanket construction is provided and comprises the steps of supporting a substrate web in coil form for unwinding rotation, unwinding and moving the forward portion of the substrate web through a laminating station, and laminating a polymeric layer adjacent the substrate web at the station wherein the polymeric layer may serve as a printing face or the method may comprise the process of forming a printing face adjacent the polymeric layer.

Abstract: A compressible printing blanket is provided which has a compressible body comprised of an elastomeric matrix having randomly disposed voids therein and a plurality of layers of discrete fibers bonded together by said matrix as a single mass with each of the layers having its fibers randomly disposed in substantially parallel relation and substantially uniformly throughout the layers with the fibers in each layer being disposed transverse the fibers of an adjoining layer.

Abstract: A smash-recoverable printing blanket having a substantially uniform thickness and method of making same are provided wherein the blanket comprises a plurality of layers including at least one layer adapted to swell upon being contacted by a liquid and a plurality of microcapsules disposed within the blanket with the microcapsules containing the liquid; and, the microcapsules are adapted to be ruptured upon smashing the blanket to thereby release the liquid contained therewithin against the one layer causing swelling thereof and restoring of the adjacent layers substantially to their original position prior to the smashing to define the uniform thickness.

Abstract: Methods of imaging and printing are provided whereby a transparent self-supporting substrate is coated with a transparent abhesive polymer and an image formed by inking said polymer and simultaneously subjecting said polymer to electromagnetic radiation to reduce the cohesive force of said ink or increase the adhesive force so as to selectively deposit ink in image configuration on said adhesive polymer, and transferring said inked image to a receiver sheet.

Abstract: A foot tension relaxer including a base upon which is mounted three successively narrowing cushion members, with the three cushion members being spanned by a flexible cover member that is attached at its peripheral edges to the base member. The configuration imparted to the flexible cover member by the progressively narrowing juxtaposed cushion members resembles the arch of the human foot. Thus, when a user steps on the flexible cover member, the resilient cushion members react against the weight of the user to gently push upward against the arch to relieve foot tension and pain.

Abstract: A printing blanket is provided which comprises a base ply, a printing face, and a high strength woven layer disposed between the base ply and the printing face with the woven layer being defined by warps and wefts wherein at least the warps are made of highly flexible synthetic filaments having a breaking tenacity ranging between 18 and 26 grams per denier and an elongation at break ranging between 3 and 5% with the blanket having optimum stability and minimum elongation under operating tension.

Abstract: A wiping cylinder is coated with a synthetic resin plastic composition by rotating the cylinder downwardly past a straight-edge blade on which the plastic composition is supplied so that a thin uniform layer is spread onto the cylinder. The blade is progressively retracted from the cylinder so that successive layers are applied to provide the desired total thickness. Provision is made for first heating and then cooling a layer after it has been applied.

Abstract: A woven fabric including fibers of high strength and low elongation extending in the warp direction, is laminated to a non-woven mat which is saturated with a latex. The exposed surface of the resultant laminate is buffed to insure precise dimensional thickness.

Abstract: A compressible offset printing blanket comprising a compressible cellular elastomeric layer or layers which contain resin microballoons in an elastomeric material. Preferably the compressible cellular elastomeric layer(s) is deposited from a layer of a cement of the uncured elastomer with which the resin microballoons have been admixed.