Agfa Gevaert Nv

Agfa-gevaert

Xeikon N.v.

Xeikon International N.v.

Leo N Vackier

Robert F Janssens

Lucien P Van Der Vliet

Luc Van Goethem

Jozef L Mampaey

Leo B Alaerts

Serge M Tavernier

Stefaan K De Meutter

Bart Peter Verhoest

Guido Vital Desie

Bart J Verlinden

Luc K Van Aken

Emile F Stievenart

Jan A Van Den Bogaert

Jan Claes

Marc A De Niel

Willy G Verlinden

Dirk F De Ruijter

William Constant Waterschoot

Dirk L Costrop

Eric Van Echelpoel

Jan Van Bogaert

Jan J Bruyndonckx

Paul Frans Janssen

Alfons Grobben

Paul Konings

Jean-Paul Martens

Roger J Bals

Luc Van Aken

The image reproduction system includes a light exposure unit and a photosensitive member having an outer surface. The exposure unit includes a staggered plurality of linear LED arrays and a staggered plurality of discrete objectives associated therewith which focus the light generated by the LED arrays on the outer surface of the photosensitive member.

Exposure unit with staggered LED arrays

A method for printing an image on a substrate by image-wise depositing, toner particles on the substrate, is disclosed, comprising: image-wise depositing dry toner particles on the substrate forming a first band-like portion of the image, conditioning the first band-like portion while keeping the substrate at a temperature equal to or lower than 100&deg; C. and further image-wise depositing toner particles on the substrate so as to form at least one other band-like portion of such image, the at least one other band-like portion of the image being adjacent to the first band-like portion. Preferably the method is used for printing substrates with an area equal to or larger than 0.25 m,.

Method for electro (stato) graphic printing on large format substrates

Sheet joggler system with an inlet roller pair (70, 70'), an outlet roller pair (71, 71'), sheet guides (48, 49) determining a curved sheet path between these roller pairs, a sheet supporting plate (65) between the inlet roller pair and the sheet guides, a sheet stop (72) at the lower end of said plate, and lateral sheet aligning members (66, 67).

Sheet joggler system

Electrostatographic printing apparatus with a recording member in the form of an endless belt (26), and an air bearing (50) for guiding such belt along an endless path, which air bearing includes two belt-supporting end sections (53, 54) with a certain circumferential size, arranged for producing supporting air cushions for supporting both marginal portions of the endless belt (26) while the belt (26) is angularly wrapped about the sections (53, 54), an intermediate section (59) located between such end sections (53, 54) for providing support for the belt (26) if a central portion thereof would tend to become displaced exaggeratedly inwardly of the bearing (50), and two air cushion relief sections (61, 62), each one located inwardly adjacent to a corresponding end section of the bearing (50), and having a circumferential size which is smaller than that of said end sections (53, 54).

Electrostatographic printing apparatus with endless recording belt

In an apparatus and method for producing simplex prints in a single pass duplex printer, two sheets are conveyed in coinciding relationship through a common path during a print cycle. While the sheets are simultaneously conveyed through the common path, a first toner image is formed on one side of one sheet and a second toner image is formed on an opposite side of the other sheet. The toner images are simultaneously fixed on both sheets by a separate fixing station.

Simplex printing with duplex printer

An electrostatographic developing device (15) including a magnet roller (16), a chamber (41) for two-component developer, a holder (22) for toner and a toner dosage reservoir (45) with an opening closed by a magnetic plug (58) of developer, and a magnet (53) for controlling such magnetic plug.

Electrostatographic developing device with toner dosage reservoir

An improved electrostatographic color printing apparatus includes an exposure unit for forming successive electrostatic latent images on the surface of a recording member in the form of an endless belt, a developing station for sequentially developing the electrostatic latent images to form toner images on the belt, and a transfer zone having electrostatic transfer stations for sequentially transferring the toner images from the belt in superposition onto a receptor sheet fed through the transfer stations while in contact with a belt section therein to produce a multicolour duplex image.

Electrostatic color printing apparatus wherein the receptor sheet is

Conveying device for magnetizable particles

An electrostatographic developing device having a developer chamber (26), a toner chamber (21), a dosage reservoir (9) and a developer roller (13) mounted within a rotatable housing (11).

Electrostatographic developing device

An electrostatographic printing apparatus is provided that is adapted for single-pass sequential multi-color duplex printing wherein the printing involves deposition and fixation of toner particles on a web-type final substrate. The apparatus includes: a first printing system having a first guiding member; a second printing system having a second guiding member, the printing systems being arranged in succession at opposite sides of the final substrate; an apparatus for rotating the guiding members and conveying the final substrate; an apparatus in each of the printing systems for superimposing color separation images in registration on the final substrate, wherein the color separation images are toner images including the toner particles; and an apparatus located between the first and second printing systems for reversing the charge polarity of the toner particles deposited onto the final substrate in the first printing system when the toner particles in the printing systems have the same charge polarity.

Electrostatographic multi-color printer for duplex printing on a

An electrostatographic printing apparatus is provided, suited for single-pass sequential multi-color duplex printing, characterized in that the printing proceeds by depositing and fixing toner particles on a final substrate (1) in web form. The apparatus includes two printing systems arranged in succession on opposite sides of the final substrate (1). Each of the printing systems includes an intermediate rotatable toner-receiving member (3), a device for rotationally driving the intermediate toner-receiving member (3), a device for superimposing color separation images in registration on the intermediate toner-receiving member (3), and a device for simultaneously transferring the superposed color separation images from the intermediate toner-receiving member (3) onto the final substrate (1). In a preferred embodiment, the transferring device is a drum or roller (4), optionally electrically biased, that forms with the intermediate toner-receiving member (3) a nip through which the final substrate (1) is passed in synchronism with the peripheral movement of the intermediate toner-receiving member (3). Preferably, the color separation images are applied in registration to the intermediate toner-receiving member by a plurality of rotatable image-producing electrostatographic drums.

Electrostatographic multicolour printing apparatus for single pass

Provided is an apparatus for processing a photographic sheet (9) which comprises at least one station (4) with inlet and outlet pressure roller pairs (42 to 45) for transporting the sheet, spray means (22) for spraying processing liquid (21) onto at least one surface of the sheet, characterised in that the station (4) comprises sealing means for maintaining a liquid seal (58, 59) between at least one roller of at least one roller pair and an adjacent wall of the washing station. Also provided is an apparatus for making an offset printing plate according to the silver salt diffusion transfer process, using the described station (4) as washing station. Also provided is a method for making an offset printing plate using the above described apparatus for processing an imaging element.

Apparatus and method for making a lithographic offset plate by the

A drum, such as a drum for an electrostatic photocopying unit, is given a uniform coating of a liquid coating composition, such as an organic photoconductor, by arranging the drum on a vertical axis coaxially with a vessel containing a body of the coating composition of a depth generally equal to the vertical length of the drum, bringing the drum and vessel into substantially telescoping relation to dip the drum substantially into the coating composition, and causing the drum and vessel to undergo relative vertical displacement along the vertical axis by the sole force of gravity to thereby bring about a progressive vertical separation of the drum from the vessel leaving a coating of the composition on the drum surface. The separation is preferably controlled at a uniform rate by means e. g. of a hydraulic cylinder supporting a movable one of the drum and vessel in opposition to the force of gravity while the gravitational force can be augmented by increasing the effective mass of the movable one.

Dip coater

An ion-exchange resin holder (18) to recover silver from photographic rinsing water with a perforate inlet (37) and outlet (29) resin restrainer between which a mass (38) of ion-exchange resin is restrained in the holder and a liquid restrainer (32) near the inlet for deflecting part of the incoming water towards the bottom end, and for allowing another part of said incoming water to pass undeflectedly towards the outlet opening.

Ion exchange resin holder

A method and apparatus for the development of an electrostatic image on a recording surface by supplying liquid developer comprising positively or negatively charged toner particles dispersed in an electrically insulating non-polar carrier liquid to a developing zone where increments of the electrostatic image are succesively developed by attraction or toner particles to a recording layer, e.g., photoconductive coating (3), in a distribution depending on the distribution of charges forming said electrostatic image, wherein the liquid developer is supplied, e.g. with ink-jet (7), to the developing zone so that in course of the period over which the development of the complete electrostatic image takes place, said developer is made available at that zone in a distribution pattern which constitutes a lower resolution version of the electrostatic image to be developed, each increment of said pattern being brought directly opposite the corresponding increment of the electrostatic image.

Growing community of inventors

's-Gravenwezel, Belgium

Leo N Vackier