Abstract:
A printer's form for transferring a flowable printing substance onto a printing material to be printed on includes a body having a surface, which surface has a plurality of openings, a plurality of cavities in the body, which cavities end in the openings of the surface of the body and contain gas, wherein each cavity is bounded by a wall, which adjoins the opening and surrounds the cavity, and devices associated with each cavity for producing an overpressure in the cavity in question. At least parts of the surface of the body and/or the wall surfaces of the walls of at least some cavities include a first wall region, which is near the opening and which is composed of a surface that can be wetted with the printing substance.
Abstract:
There is described a method for manufacturing intaglio printing plates for the production of security papers, wherein a laser beam (2) is used to engrave intaglio printing patterns (3, 3.1, 3.2, 3.3) directly into the surface of a laser-engravable, especially metallic, printing plate medium (1), wherein laser engraving of the printing plate medium (1) is carried out layer by layer in several individual engraving steps performed one after the other in register so that the intaglio printing patterns (3, 3.1, 3.2, 3.3) are gradually engraved into the surface of the printing plate medium (1) up to desired engraving depths, the surface of the engraved printing plate medium (1) being cleaned from residues of the laser engraving process following and between each individual engraving step.
Abstract:
An improved apparatus and method for forming images comprising Braille, raised print, regular print, or a combination is described. The architecture for the printing of Braille dots using marking material such as UV gel ink. The UV gel ink is deposited on a drum that has an array of closely packed raised features like mesas that are cup-shaped. The mesas on drum are filled with the UV gel ink and transferred to paper or another substrate. Partial curing can occur on the drum and the dots can be fully cured after transfer to the substrate. The mesas are shaped so that the dots take on a final shape consistent with usual Braille features.
Abstract:
A method of selectively exposing a liquid photopolymer printing blank to actinic radiation to create a relief image printing plate. The method includes the steps of: (1) positioning a programmable screen between the top glass and an upper source of actinic radiation, wherein the programmable screen is programmed with an image file of a desired image; (2) exposing the layer of liquid photopolymer to actinic radiation from the upper source of actinic radiation through the programmable screen for a period of time to crosslink and cure at least a portion of the liquid photopolymer adjacent to the backing sheet and create a floor layer therein; and (3) imagewise exposing the layer of liquid photopolymer to actinic radiation from a lower source of actinic radiation through a negative of the relief image to crosslink and cure selective portions of the liquid photopolymer on the floor layer and create the relief image therein. A liquid platemaking exposure system is also described.
Abstract:
The rotogravure cylinder comprising a rotary gravure base and thereon a copper engraving layer contains a zinc layer between a gravure base and a layer package suitable for engraving and printing. This layer package for instance can comprise a metallic support layer, a copper engraving layer and suitably a protection layer. Deposition of the zinc layer may be tuned for thickness variation, in combination with deposition of the layer package in a fixed thickness.
Abstract:
The present invention describes a method for manufacturing rotogravure cylinders with a cylinder base made of aluminum and a single metallic layer on the cylinder surface. The method comprises the construction of the cylinder base, the deposition of the metallic layer on the cylinder surface, the thinning of the cylinder to achieve the required dimensions, the polishing of the cylinder surface and finally the etching of the cylinder with the desired printing pattern. The metallic layer can be any copper alloy that will produce a surface with a Vickers hardness of about 400 HV. The metallic layer is deposited onto the cylinder base using any thermal spraying method. The cylinder surface is then thinned and polished by using any conventional method. Finally, the cylinder is etched to provide a superb cylinder for the printing industry.
Abstract:
A gravure printing system is disclosed. A gravure cylinder having a first and a second plurality of discrete cells disposed upon an outer surface. A cell of the first plurality of discrete cells receives a first portion of a fluid from a first reservoir and a cell of the second plurality of discrete cells receives a second portion of the fluid from a second reservoir. The first and second portions of the fluid is fluidically displaceable into the respective first and second reservoirs through a discrete channel having a single entry point at a position external to the gravure cylinder, a first exit point into the first reservoir, and a second exit point into the second reservoir. The discrete channel provides fluid communication of the first and second portions of the fluid from the position external to the gravure cylinder to each of the respective first and second reservoirs.
Abstract:
The present invention relates to a cliche for offset printing for forming a mesh pattern, and more specifically, to a cliche for offset printing comprising a mash pattern with a plurality of intersection units, wherein the plurality of intersection units are formed in a curved shape with a radius of curvature 0.6 to 4 times that of a mesh line width.When the cliche for offset printing of the present invention is used, line width reductions generated around the intersection units during mesh pattern printing may be reduced. As a result, when a final product is manufactured by using the cliche for printing of the present invention, the surface resistance properties of the product may be improved.
Abstract:
The present invention relates to an apparatus, process and set of plates for printing. For example, the present invention can relate to a single printing station in which a first cylinder having a printing plate with an inked region operates with the second cylinder having at least one transfer plate, and suitably multiple transfer plates such as rubber blankets, wherein the transfer plates are adapted so as to have an inked region and a non-inked region. The inked region and the non-inked region of the transfer plate registering with the inked region of the printing plate so as to determine the content of the image printed.
Abstract:
The present invention relates a printing element comprising at least one polymer layer which has photoimageable constituents and additions to make the polymer layer either hydrophobic or hydrophilic. The printing element may have two polymer layers on a substrate in which one of the layers comprises fluorinated acrylates or methacrylates.