Abstract: A method of printing a color image on a medium, the method comprising the following steps:separating the image to be reproduced into a composition of colored unit areas, said unit areas being disposed in a predetermined distribution, the color of each unit area being selected from a predetermined set of base colors and a predetermined set of tones of said base colors, the number of tones for at least one of the base colors being greater than or equal to three, the base color and the tone allocated to each of said unit areas being selected so that said composition of colored unit areas visually reconstitutes the image to be reproduced; andprinting said composition of colored unit areas on said medium by means of inks whose hues are selected, taking into account the color of said support, so as to be capable of reproducing said base colors and the tones thereof during printing, the tone of a base color allocated to a given unit area being obtained during printing by acting on the proportion of each ink within t

Abstract: A system and a method for producing displays such as signs and cards includes a substrate of material which is transferred from a supply roller to a first receiving unit. During the transfer, the substrate passes a series of color printing stations which applies a four-color image to the substrate, an opaque printing station which applies a layer of opaque ink to selected portions of the four-color image, a thick printing station which applies a pattern of viscous translucent ink to form extraordinarily thick ridges of translucent ink on the substrate. Finally, a metalized substance is applied to the substrate over the various ink layers using vapor metalization. As provided herein, the metalized substance is applied to the substrate during transfer of the substrate from the first receiving unit to a second receiving unit.

Abstract: Sheets of defined format lengths are printed in a sheet-fed rotary printing press with a plurality of printing units. Each of the printing units includes an impression cylinder and a counter-pressure cylinder. The two cylinders define a printing nip and the printing units are disposed such that a sheet travels through the printing nips in succession. The impression cylinders have a circumference which is no longer, and preferably shorter, than a shortest format length of the sheet. The impression cylinders are disposed such that mutually adjacent printing nips of adjacent printing units are spaced at a distance which is shorter than the shortest format length to be printed. The impression cylinders have a circumferential surface carrying a subject or motif to be printed. The images printed on printing material therefrom have an image spacing between one another. The circumference of the impression cylinder is smaller than the sum of the image length and the length of the image spacing.

Abstract: Apparatus for printing a decorative pattern of differing colors on the cylindrical outer surface of a can body wherein a pattern of one color is applied and dried on the outer surface and a pattern of a different color is applied to the cylindrical outer surface of the can body with only portions of the pattern of a different color superposed over portions of the pattern of one color and repeating the steps for a plurality of additional patterns and different colors.

Abstract: A length of web material is worked by a number of individual work units each of which performs a work function on the material to progressively achieve an end result, the work units being arranged serially along an X coordinate direction extending lengthwise of the web material and the web material being moved unidirectionally by each work unit. Accumulators are provided between adjacent ones of the work units and one or both of the work units located immediately on opposite sides of an accumulator are controlled in response to the amount of slack web material contained in the accumulator, as by stopping the feeding of the web material by the upstream one of the work units when the accumulated slack material exceeds a given amount and/or by stopping the feeding of the web material by the downstream one of the work units when the amount of accumulated material falls below a given amount.

Abstract: A group of measured fields (as well as a process for using the measured fields) is provided for determining color data of a printed product, especially for color management in the rotary offset printing of single editions, with a plurality of measured fields, which are printed on a printed product to be checked or on a primary print in such a way that they can be optically scanned. The group of measured fields includes a first combination measured field, in which the fundamental colors are superprinted with their nominal degrees of surface coverage (F.sub.c1, F.sub.m1, F.sub.y1). Additional combination measured fields are provided, in which the fundamental colors are superprinted at varied nominal degrees of surface coverage {(F.sub.c2 =F.sub.c1 +.DELTA.F.sub.c2, F.sub.m1, F.sub.y1), (F.sub.c1, F.sub.m3 =F.sub.m1 +.DELTA.F.sub.m3, F.sub.y1), (F.sub.c1, F.sub.m1, F.sub.y4 =F.sub.y1 +.DELTA.F.sub.

Abstract: A printing machine includes a plurality of printing rolls for custom printing multi-coloured indicia or designs on corrugated cardboard boxes. Each roll prints with ink of a different colour to the others. The design is prepared on a computer using graphics design tools and separated into components of a specific colour each. The designs are distorted asymmetrically no compensate for curvature error and each component is printed on a separate sheet of polyester or other transparent, dimensionally stable material. In one preferred embodiment, outline indicia of each element in a design component is printed on the sheet. In another embodiment, to save time, coordinate marks and identification indicia are printed on the sheet. Dies corresponding to each element are manufactured separately. A printing mantle is assembled for each roll by affixing the dies in positions determined by the printed indicia.

Abstract: A method of making color filters for liquid crystal display panels. A multicolored ink pattern is formed on a collector device, then hardened or cured while on the collector device. The multicolored pattern is then applied to a substrate using a suitable adhesive.

Abstract: A polychromic image is reproduced and transferred onto a substrate by (a) providing a single support member having a continuous surface moving at substantially constant speed along a predetermined path; (b) forming on the surface a colored image from variable printing data with a printing ink containing a coloring agent; and (c) bringing a substrate into contact with the colored image to cause transfer of the image from the surface onto the substrate and thereby imprint the substrate with the image. Steps (b) and (c) are repeated several times to define a corresponding number of printing stages arranged at predetermined locations along the aforesaid path and each using a coloring agent of different color, and to thereby produce several differently colored images which are transferred at respective transfer positions onto the substrate in superimposed relation to provide the desired polychromic image.

Abstract: A system and a method for producing displays such as signs and cards includes a continuous substrate of material which is passed from a supply roller to a take-up roller. A series of printing stations apply a four-color image to the substrate. A fifth printing station then applies a layer of opaque ink to selected portions of the four-color image. Subsequently, a rotating silk screen applies a pattern of viscous translucent ink to form extraordinarily thick ridges on selected portions of the four-color image and opaque ink layer. Finally, a metalized substrate is laminated to the plastic substrate over the various ink layers.

Abstract: A printer capable of continuously and sequentially performing the printing of a picture and a text includes a picture printing device for printing an image and a text printing device for printing text. The picture printing device includes an ink sheet and a recording head to print the image by overlaying sublimed color inks. The text printing device may take the form of an ink-jet printer including a head having nozzles for ejecting the ink by means of the pressure of bubbles. Alternatively, the text printing device may take the form of a laser printer.

Abstract: The invention relates to methods and apparatus useful for making color filters for liquid crystal display panels. A multicolored ink pattern is deposited to a substrate while in a deformable state, flattened during the deposition process, and the deformed, more uniform shape of the printed dot is thereafter retained, preferably by curing during deposition. The transfer layer is preferably formed on a collector roll. A plurality of colored ink patterns is then transferred to the collector roll, preferably from a single pattern roll having multiple patterns thereon, to form the multicolor image that will become the color filter. This multicolored image is then transferred to the substrate.

Abstract: A highly flexible printing apparatus is provided comprising printing modules (A-F) and cassettes (8) containing different web processing means. Each of the cassettes (8) is adapted to be mounted on a selected printing module (A-F) to cooperate with the module (A-F) during production of printed matters and contains means for a specific web processing technology that will be provided by the selected printing module (A-F) when the cassette (8) has been mounted to it. The different cassettes (8) may contain web processing means of a great variety, such as offset printing means, dry offset printing means, letterpress printing means, serigraphy means, hot foil application means, flexographic means, raised printing means, punching means, means for printing electronically generated images, etc.

Abstract: The present invention is directed to a method of printing ink upon a continuous substrate using a printing apparatus. First, the substrate is fed around a central impression cylinder which rotates so that the substrate successively passes through at least one face roll and a plurality of inking stations. When passing through each ink station, ink is heated to a predetermined temperature which is higher than the temperature of the central impression cylinder wherein the viscosity of the ink is dropped low enough so that the ink may be transferred to the substrate. Next, the ink at each inking station is applied to the substrate causing the temperature of the ink to drop and the viscosity to climb. This allows previous down inks to appear to be several times more viscous than the ink applied at the current inking station and to pull the ink off a printing plate in the direction of the substrate. Last, the inked substrate, which has passed through all inking stations, is cured at a curing station.

Abstract: Offset printing method wherein ink in the form of screened half-tone dots or pixels and unscreened printing-image elements is applied to a printing surface of a recording medium by means of a printing device; a printing form being generated from signals reproducing a printed image; the printing form being inked with an inking device; and the ink being transferred to the printing surface, upon transport of the recording medium relative to the printing device; the signals being processed in a control device for the printing device; includes, near the printing device and before the printing form is generated on a screen or monitor, forming a copy of the printed image from the signals reproducing the printed image and from signals containing parameters of the printing device; whenever the copy deviates from a desired printed image, manually inputting correction values for local inking into the control device, until the copy corresponds to the desired printed image; and generating the printing form and adjusting t

Abstract: Reprintable impression cylinder for a printing press, the impression cylinder having an outer cylindrical surface wettable, during printing, with a heated printing ink which is transferrable to printing material or stock, includes two superimposed layers formed on the outer cylindrical surface of the impression cylinder, including an outer layer of relatively lower heat capacity and an inner layer of relatively higher heat capacity.

Abstract: A process and apparatus for printing with a press at least one image by transfer of an electrostatic colorant vehicle between an intermediate transfer element and a printing carrier, including the steps of making the intermediate transfer element in the press by magnetically developing zones on a substrate, depositing a magnetic, insulating, and hardenable material on the substrate to constitute the zones, hardening the hardenable material, subjecting the hardenable material to an electrostatic charge in order to lend the zones an affinity for the colorant vehicle, and transferring the colorant vehicle to the printing carrier by directly contacting the intermediate transfer element to the printing carrier.

Abstract: A plate-type printing device and a method of using same are disclosed, wherein the device is composed of a plurality of plates stacked in a front-to-back facial configuration, the plurality of plates containing: at least one inlet port for at least one colorant; at least one colorant-supply plate having formed on a front facial surface thereof at least one colorant-supply cavity disposed in fluid communication with the at least one inlet port; and at least one colorant-transfer plate having formed on a front facial surface thereof at least one colorant-transfer cavity shaped to form a first design pattern, the at least one colorant-transfer plate further containing at least one cavity-port formed in the at least one colorant-transfer cavity, the at least one cavity-port being disposed downstream of and in fluid communication with the at least one colorant-supply cavity.

Abstract: A method for vertically aligning the color plate cylinders of a press, which prints a two-color image on paper, in order to eliminate the vertical misalignment of the colors in the image printed. The method requires the use of a cylinder positioner that is releasably mounted on the press and involves operating the press to initially print the image, detaching the cylinder positioner from the press, adjusting the position of a positioner stop on the cylinder positioner based on the amount of misalignment in the printed image, reattaching the cylinder positioner, decoupling a color plate cylinder from normal operation, rotating the press's blanket cylinder until it impacts the positioner stop on the cylinder positioner, recoupling the color plate cylinder and then operating the press to correctly print the image.

Abstract: A process for correcting misregistration between imprinted images from successive printing stations comprising measuring the width of the imprinted image of each station and comparing the width to determine any difference, and creating a correction signal if a difference does exist to change the humidity in the web passing through the printing unit. The device includes photoelectric devices for determining the width of each image created at each station, an electronic device for comparing the width of each image and, if a difference exists, creating an error signal which is applied to the first drying unit and a secondary error signal applied to the second unit to correct the humidity of the web leaving each dryer.

Abstract: A printing process prints a continuously moving substrate with elongate, semi-tone graphics. The printed substrate is incorporated into a composite elastic material, in which the substrate is contracted, thereby forming a desired full-tone graphic from the semi-tone graphic.

Abstract: The wear on printing forms in a printing machine is monitored in that the inking values at certain locations on the printed product are measured. At least two measurement locations are defined on the print image. The first measurement location has a defined tonal value above an upper tonal value, and the second measurement location has a tonal value below a lower tonal value. The printed product is scanned as it leaves the printing unit. The measured inking values at the measurement locations are compared with the setpoint values as defined by the tonal values at the defined locations. If the lower tone signal is below the setpoint signal while the upper tone signal corresponds or exceeds the setpoint inking values, the control unit deduces that the printing plate may be worn. The printed product count may be used as auxiliary information in the wear determination.

Abstract: A method for eliminating gear train backlash in the drive of a sheet-fed printing machines when changing the printing mode of the machine between face printing and perfecting or vice versa is disclosed. The printing machine has a gear train, a longitudinal drive shaft, and a plurality of input drives connecting the drive shaft to the gear train. At least one separation device is provided in the gear train, and at least one clutch is provided in the drive shaft. Releasing both the clutch and the separation device disconnects the printing machine into decoupled regions. After the relative position of those regions are adjusted for the new printing format, the new relative position is fixed by engaging the separation device. The segments of the longitudinal drive shaft is then adjusted to apply a torque to the gear train to eliminate backlash in the drive. The positioning can optionally be performed by the main drive motor or a separate positioning drive connected to the drive shaft.

Abstract: In a process and apparatus for printing on flat individual articles such as cards by means of offset printing, the article, before being moved into a starting position for the printing operation, is firstly aligned relative to the printing cylinder. While the article is maintained in the aligned position by suction force, the article is then transferred on to a holding device and into the starting position for the printing operation. The holding device with article is then moved in a first direction relative to the printing cylinder for transfer of the print image therefrom on to that article. The holding device then moves in a second direction opposite to the first direction. During that movement the article with print image thereon is displaced relative to the holding device on which it is supported, to provide space on the holding device for the article to be printed upon in the following working cycle.

Abstract: The invention relates to methods and apparatus useful for making color filters for liquid crystal display panels. A multicolored ink pattern is deposited to a substrate while in a deformable state, flattened during the deposition process, and the deformed, more uniform shape of the printed dot is thereafter retained, preferably by curing during deposition. The transfer layer is preferably formed on a collector roll. A plurality of colored ink patterns is then transferred to the collector roll, preferably from a single pattern roll having multiple patterns thereon, to form the multicolor image that will become the color filter. This multicolored image is then transferred to the substrate.

Abstract: A method and apparatus for making contoured planarizing or protective layers for color filters for liquid crystal display panels. A transfer layer is formed on a collector device having a contoured surface. A plurality of colored ink patterns is formed on the transfer layer thereby forming the multicolor image that will become the color filter. This multicolored image is then transferred to the substrate so that the transfer layer in effect becomes a top protective layer or planarizing layer. The contoured surface on the collector device is imparted to the planarizing layer.

Abstract: A color filter for an AMLCD panel has a pattern of multi-color dots, each dot having red, green, and blue components in a black matrix. Each component is the cured product of a color pigment dispersed in a radiation-curable ink. The ink may be an ink curable by a cationic mechanism, a free-radical ink, or a hybrid, free-radical/cationic ink. The filter is produced by successively applying patterns of colored inks to a transfer roll, collecting the patterns on a collector roll to form an array of multi-color dots that is transferred to the substrate, and irradiating the array of dots to at least partially cure the inks.

Abstract: A method and apparatus for printing a multi-color ink pattern on a substrate surface which comprises arranging a series of patterned surfaces with each patterned surface having a pattern that is unique to one of the colors and that corresponds to the pattern of that color in the multi-color pattern, supplying to each patterned surface a radiation-curable ink formulation, having an appropriate colorant to form an ink pattern thereon, transferring individually the color pattern from each patterned surface to a collector roll, increasing the cohesiveness of the ink sufficiently to permit complete transfer of the pattern, forming a composite of the color patterns on a collector roll, and transferring the composite pattern in its entirety to the substrate surface.

Abstract: A method for controlling the ink feed of a printing machine, especially an offset printing machine, for printing four-color half-tone combined prints. In selected test regions in an original and in the corresponding test regions in the printed sheet, the standard color values of the four-color overprint are determined. The infrared color density for the black printing ink is determined in the near infrared. The standard color values of the four-color overprint are converted by means of a linear transformation into standard color values corresponding to the combined print of only the three chromatic colors. The coefficients of the linear transformation are determined empirically as a function of the infrared color density of the black printing ink. From the standard color values of the three-color print, the effective surface coverage values of the three chromatic colors are determined via the modified Neugebauer equations.

Abstract: A method and apparatus are provided for successive application of printing dyes to textiles and other sheet materials. The printing dyes are cooled in separate and successive printing stations and a direct contact may be provided between a cooling surface and a printing dye which has been applied in a previous station. A fixation of the printing dye is ensured and the surface tension is reduced, whereby the printed material is of high quality without smearing of dyes and without the risk of wet dyes adhering to the printing form in a succeeding printing station.

Abstract: A method and a device for printing disc-shaped registration carriers, whereby a print built up of several colors is provided on the registration carrier. Use is made of a printing cylinder, which is moved over a few printing plates, which have been moistened with various colors of ink, whereby the printing cylinder is subsequently rolled over the registration carrier. The device comprises a plurality of processing stations for registration carriers, as well as a transport device by which the disc-shaped registration carriers can be moved from one processing station to the other processing station. One or more processing stations comprise a printing device disposed therein.

Abstract: A method for producing a printed piece of paper wherein the paper is formed by forming fabric having knuckles disposed thereon. Color printing screens are provided having diagonals for depositing ink arranged at angles of typically 45.degree. or more. The printing screens are applied to the paper after ensuring that the angles of the diagonals in the printing screens are different from angles of areas of high and low density in the paper formed by the forming fabric knuckles when the printing screens overlie the piece of paper, whereby to provide more uniform print on the piece of paper.

Abstract: A dual substrate, single-pass printing process prints a high basis weight substrate and a low basis weight substrate. Ink striking through the low basis weight substrate is collected and absorbed by the high basis weight substrate. The printed substrates are then separated and rewound for subsequent transport and handling.

Abstract: A multi-color printing press having a single segmented impression cylinder with multiple, segmented blanket cylinders of equal diameter arranged about the periphery thereof. The segments of the impression cylinder and the blanket cylinders are equal in length and the number of segments on the impression cylinder is equal to the number of segments on the blanket cylinders multiplied by a whole number, plus one additional segment. Each blanket cylinder is provided with a plate cylinder of equal diameter which has the same number of segments. Color rolls provide each segment of the plate cylinder with a different color. Sheets to be printed are fed to the gripping means on the successive segments of the impression cylinder and delivery means removes sheets after printing. Each sheet is held on the impression cylinder for a number of revolutions equal to the number of segments on any one blanket cylinder.

Abstract: A method for producing a stamp includes the following steps: (1) forming a stamp member from a rubber material which has a low rebound characteristic and low compressibility; (2) preparing a plurality of stamping inks of different colors, each of the stamping inks having a relatively high viscosity and low flowability; (3) diluting the stamping inks with a diluent to increase their flowability and permeability; (4) placing a plurality of ink-absorbing members in a side-by-side adjacent arrangement and isolating them from one another in order to prevent fluid communication; (5) adding the diluted stamping inks into the ink-absorbing members respectively; (6) saturating the stamp member with a highly volatile liquid; (7) disposing the stamp member on the ink-absorbing members to transfer the diluted stamping inks from the ink-absorbing members to the stamp member so as to have the stamp member formed with regions of different colors, the highly volatile liquid assisting the infiltration of the diluted stamping

Abstract: An apparatus for applying ink to an image on an ink stamp. The apparatus comprises an ink-impregnated sponge having side walls that intersect at a first end, where an angle between the side walls is acute at the first end. The side walls are so curved that: (a) a user can see the first end while bringing the sponges into contact with the image; and (b) the likelihood that ink will be applied to an undesired portion of the image is decreased.

Abstract: A process for producing high quality multi-color images on textured surfaces. A plurality of color separation negatives are produced from an original multi-color image. Printing plates are prepared using the color separation negatives and a stochastic random dot screen. The plates are mounted on a series of printing units and the separation images are printed in register using an ink that is cured to a substantially dry state by exposure to ultraviolet radiation. A source of ultraviolet radiation is placed between each pair of printing unite to cure each image before the next is printed. The images are printed on a textured substrate, such as canvas. Selected areas are then overprinted serigraphically using transparent to translucent liquids, at least some of which include translucent colorants. The imaged substrate may be coated with a liquid plastic which is textured as the plastic dries. The final product is a high quality, artistic, rendering of the original image.

Abstract: A process is provided for printing fabric, including fabric used in the making ties and other clothing articles. The process includes the step of stabilizing the fabric so that it can be subjected to printing processes without the degree of fabric deformation that would otherwise take place. A backing sheet of kraft paper or other suitable material is used to stabilize the fabric. In one embodiment, the fabric is stabilized so that it can be pulled through a lithographic printing apparatus. Alternatively, the stabilized fabric can be subjected to screen printing processes. The invention is also directed to the stabilized fabric.

Abstract: Color coding of characters both for optical character recognition by a machine and for viewing by a human is provided by coloring a character with a predominate color distinguishable by humans and a non-predominate color non-distracting to humans, but distinguishable by a color scanner. The advantage of the present invention is higher optical character recognition accuracy rates without the severe visual distraction to human readers of prior art color coded characters. A further technical advantage is that the invention can be practiced with conventional color printers and color scanners instead of the specialized apparatus of prior art color coded characters.

Abstract: A method of printing color images which includes the formation of a pattern of three primary color separated halftones of the image from a medium applied to a substrate. The medium is embossed to form a surface relief configuration on each halftone image. Each surface relief configuration reflects one specific primary color at a specific angle. In one embodiment, the medium is applied to a substrate in the pattern of color separated halftone images in a single printing pass by a composite offset printing plate. The medium is then embossed by an embossing plate to create the surface relief configurations thereon. In a second embodiment, the medium is applied to the substrate and embossed by a single plate in a single printing pass. In a third embodiment, the medium is applied to the substrate in a relatively continuous layer and thereafter embossed to simultaneously create a pattern of color separated halftones of the image and a different surface relief configuration on each halftone image.

Abstract: Method of, and apparatus for, processing a color coded character to recognize the character being examined by an OCR device. Said color coded character comprises a predominate color associated with said character distinguishable by humans, and a non-predominate color associated with said character and non-distracting to humans, but distinguishable by a color scanner. The present invention allows the non-predominate color of a character to be used as the sole criteria for recognizing the character.

Abstract: A register mark and a system for bringing a pair of register marks into alignment is disclosed. A first register mark comprises a plurality of dots of a first frequency, and a second register mark comprises a plurality of dots of a second, generally higher frequency. When the first and second register marks are overlaid, an interference pattern resulting from the difference in frequency is observed. The first and second register marks are in alignment when the interference pattern produces a maximum bright spot in the center of the register mark. A small relative movement of the first and second register marks results in a larger relative movement of center of the bright spot. The position of the bright spot indicates which direction and how much to move the second register mark in order to achieve image registration. In an alternate embodiment of the present invention, the frequency of dots in each register mark is warped with distance from the center of the mark.

Abstract: Disclosed is a process for making a preliminarily printed formed body, which is characterized in that a halftone separated rectangular printing plate is once made from a rectangular original, halftone dots of each halftone-separated image are developed on an annular plane by picture element units finer than the halftone dots to deform the shapes of the dots, an annular halftone dot image is formed based on the changes of the shapes of the halftone dots and a halftone printing plate for the annular halftone dot image is made, and this halftone printing plate is applied to a blank to be formed. According to this process undesirable formation of a striped pattern caused by the elongating flow of the blank in the height direction and the contracting flow of the blank in the circumferential direction is prevented and a strange feeling is not given to the printed image, and a faithful printed image can be reproduced.

Abstract: A method for preventing counterfeiting or theft of sales, bank checks and other important records and documents comprising alphanumeric characters including, the steps of printing different parts of at least come of the characters in a predetermined sequence of colors, dyes or other materials from a printing ribbon on which the segments or color are serially or alternatively deposited in a predetermined sequence of segments. Additionally, the method and apparatus for fabricating a multi-colored printing ribbon by depositing spaced segments of a first color at a first color depositing station and then inserting segments of a second color between said segments of said first color at a second color depositing station. By providing multiple color applying regions at each station carefully controlled color segments are produced on the printing ribbon. Means are provided to adjust segment spacing, the amount of coloring material deposited and the timing of the overall device.

Abstract: An improved method and apparatus for the manual block printing of multicolor images upon an article to be printed, wherein the article is inserted between a printer base and a generally rectangular housing having means to yieldably urge said housing onto the base, a pair of guide members adjustably secured onto the printer base for registration and alignment of a corner of the article receiving the image, and a printer having a tray holder, a printing tray received on said tray holder and having a recess on its underside to receive a rubber cushion with the image thereon, and a handle projecting upward to allow the operator to manually insert and remove the printer from the housing to transfer ink from an ink source to the article to be printed. A number of images are provided, each image used for a single color of ink, and the articles are repeatably aligned for transfer of each image and color of ink in turn to form the final multicolor image.

Abstract: A method for color adjustment and control in a printing press wherein the density spectra of individual process colors as well as the density spectrum of the color of paper are stored with given fractional percentages. The density spectra of at least one measuring point per ink zone on a printing copy and at respective points on a printed product are then measured. The density spectra measured on the printing copy and the printed product are then expressed as a linear combination of the density spectra of the individual process colors and the density spectrum of the color of the paper multiplied by fractions, the fractions being calculated so that the density spectra of the printing copy and the printed product are approximated through the linear combination. In the case of a deviation of the fractions between the printed product and the printing copy, the positions of the ink keys are adjusted so that a match of the density spectra is achieved.

Abstract: A method of mutually adjusting single-color images on a rotary printing press for printing multicolor images on a continuous paper strip, each single-color image being printed by a respective printing cylinder adjusted in relation to the other printing cylinders by selecting a reference cylinder from among the printing cylinders; disconnecting the printing cylinder for adjustment from a transmission common to all the printing cylinders; and reconnecting the transmission and the printing cylinder for adjustment, upon the reference cylinder, powered by the transmission, eliminating any difference in timing in relation to the printing cylinder for adjustment. FIGS. 1 and 4).

Abstract: Additional Color Density Method is a process utilizing, but not limited to, an additional plate of each of the 4 standard process colors; magenta, cyan, yellow, and black, whereas the first plate of each color is the same as conventional 4-color plates and, whereas the second plate of each color is an Additional Color Density Method utilized to produce the difference between a conventional original density-to-reproduction density gradation curve and a more desirable enhanced original density-to-redirection density curve, whereas the 8 colors of the combination 4-color process with Additional Color Density Method reproduces an image that offers the additional contrast of high density maximum with a gentle control throughout the gradation curve that is smooth and void of harsh contrast changes.

Abstract: A method of printing with at least two printing plates, or their equivalent, characterized in that associated halftone dots belonging to two distinct pluralities, each of which is printed with one of said two printing plates, and each of which are interleaved with the other and printed in a color different from the other, are separated by a gap when printed in perfect register.

Abstract: A process for producing a window glass with a thin film thereon, which comprises coating a coating solution on a glass substrate by flexographic printing and then baking the coated glass substrate to form a thin film.