Abstract:
A thermal ink jet printer including a frame, a printhead mounted to the frame for printing ink images onto a heated and supported substrate, and a wear resistant and efficient substrate heating and supporting assembly mounted to the frame. The wear resistant and efficient substrate heating and supporting assembly includes metallic core having an inner surface and an outer surface, a heating device for heating the inner surface of the metallic core, and a ceramic aluminum nitride or aluminum oxide coating formed over the outer surface of the metallic core for contacting and supporting a substrate, and for durably withstanding scraping contact from a stripper member used for stripping substrates from a surface of said ceramic coating.
Abstract:
A postage printing system, comprising an ink jet printer including a print head for printing a postal indicia on a mailpiece and a control system. The control system is in operative communication with the print head and performs the following: monitoring an initial temperature of the print head; causing the print head to print a test print; monitoring a subsequent temperature of the print head after completion of the test print; comparing an actual temperature change, from the initial temperature to the subsequent temperature, within an expected temperature change; and continuing normal operation of the postage printing system if the actual temperature change is with an acceptable range of the expected temperature change.
Abstract:
Disclosed is a process which comprises (a) applying to a substrate a fixing fluid which comprises a material selected from the group consisting of (1) block or graft copolymers of dialkylsiloxanes and polar, hydrophilic monomers capable of interacting with an ink colorant to cause the colorant to become complexed, laked, or mordanted, (2) organopolysiloxane copolymers having functional side groups capable of interacting with an ink colorant to cause the colorant to become complexed, laked, or mordanted, (3) perfluorinated polyalkoxy polymers, (4) perfluoroalkyl surfactants having thereon at least one group capable of interacting with an ink colorant to cause the colorant to become complexed, laked, or mordanted, and (5) mixtures thereof; (b) incorporating into an ink jet printing apparatus an ink composition which comprises water and a colorant which becomes complexed, laked, or mordanted upon contacting the fixing fluid; and (c) causing droplets of the ink composition to be ejected in an imagewise pattern onto the substrate.
Abstract:
The printer comprises a first receptacle (11) for the sheets to be printed, a sheet feeding path (27) with a printing zone (14) and a second receptacle (15) for the printed sheets. The latter is integral with an intermediate storing device having storage trays (42, 43) thus forming a group (44) which can be pivoted about a shaft (45). The sheets printed on a first face are fed by conveying members (57) into the storage trays, retained for drying, fed again into the feeding path (27) where they are reversed for printing on their second face and then arranged in the second receptacle (15). Accordingly a duplex printer is obtained, which can be used reliably with ink jet printheads, and which works dependably, has low overall dimensions and is simple and inexpensive to build.
Abstract:
An ink jet recording medium for a pigment ink, which including a substrate, a porous layer of alumina hydrate having a thickness of from 1 to 200 &mgr;m, formed on the substrate, and a water-soluble resin layer having a thickness of from 0.01 to 50 &mgr;m, formed as an upper layer thereon.
Abstract:
An image recording apparatus using a plurality of recording heads that can prevent black lines from occurring at boundaries of each scanning of the recording heads. The total recorded ink volume at the boundaries is positively reduced so that the black lines and the overflow of ink are prevented. The apparatus includes at least a pair of a dark head for discharging relatively dark ink and a light head for discharging relatively light ink, and separates an input image signal into image signals applied to the dark and light heads using at least two tables. The two tables, one for edge nozzles of each recording head and the other for the remaining nozzles, separate the input image signal independently so that the total ink volume discharged from the edge nozzles are limited to a relatively small amount. Further, the total volume of inks discharged from the edge nozzles of the recording heads are positively reduced by performing black abstraction processing, UCR processing and black inking processing on the basis of the image signals after the separation by the tables, which image signals are linearly correspond to the ink volume.
Abstract:
Disclosed herein is an ink-jet printing method comprising ejecting inks by an ink-jet printing apparatus to conduct printing on a cloth, wherein a cloth having water absorption of at least 3 seconds as determined by a method (dropping method) prescribed by JIS L-1096 A is used as said cloth, a shot-in ink quantity per unit area of the cloth is changed to conduct gradation control, and a shot-in ink quantity per ink upon printing of the maximum color density is adjusted within a range of from not less than 8.0 &mgr;g/mm2 to not more than 35.0 &mgr;g/mm2.
Abstract:
Ink jet printing apparatus for forming a plurality of ink images on a receiver and for cutting the receiver to form separate prints of such ink images in response to one or more digital image files each including at least one digital image is disclosed. The ink jet printing apparatus has at least one ink jet print head adapted to deliver ink to the receiver and at least two receiver webs. One or more webs are selectively moved along a first receiver path past the ink jet print head. Control circuitry responds to one or more digital image files for actuating the ink jet print head to form ink images on the web(s) of receiver in a manner that minimizes receiver waste. Actuatable receiver cutter responds to the control circuitry for cutting the receiver across the first receiver path.
Abstract:
Apparatus for forming an image on a receiver in response to a digital image includes print heads for transferring colorant to the receiver. The receivers are stored in a receiver supply device in a humidity controlled environment. A receiver transport mechanism moves the receiver to a position where the print heads transfer colorant to the receiver to form an image on the receiver.
Abstract:
An ink jet printing process for improving the light stability of an ink jet image comprising: providing an ink jet recording element comprising a support having thereon an image-recording layer comprising a cross-linkable polymer of gelatin or acetoacetylated poly(vinyl alcohol) and a mordant; applying liquid ink droplets of a dye on the image-recording layer in an image-wise manner, the dye being a water-soluble deprotonated cationic dye which is capable of being reprotonated to a cationic dye having a N—H group which is part of a conjugated system; and applying an aqueous solution of a multivalent inorganic salt to the image to cross-link the polymer.