Agfa Gevaert Nv

Xeikon N.v.

Afga-Gevaert Nv

Jean A Van Daele

Patrick M Pandelaers

Etienne M De Cock

Lucien A De Schamphelaere

Ludo Verluyten

Maurits Geens

Wim Jacques Michielsen

Johan Denise Elsermans

Koen J Van De Poel

Joseph A Soetaert

An electrostatographic printer is provided in which a web of receiving material (12) is fed along a web path, at least one toner image is formed on at least a first face of the receiving material (12) as it is fed along the web path and the toner image is fixed onto the receiving material (12). A finishing element (66, 67) positioned downstream of the fixing station (16) contacts the first face of the receiving material (12) while the finishing element is at a temperature above the glass transition temperature T.sub.g of the toner to modify the finish of the toner image.

Electrostatographic printer for imparting a modified finish to a toner

An electrostatographic printer for forming an image onto a web comprises at least one toner image-producing electrostatographic station having a drum onto which a toner image can be formed, a transport for conveying a web past the image-producing station, apparatus for controlling the speed and tension of the web while it is running past the image-producing station, and transfer apparatus for transferring the toner image on the drum onto the web. The printer is characterized by a control arrangement for switching between a printing mode wherein a printing web moves in synchronism with the peripheral speed of the drum and a refurbishment mode wherein a refurbishment web moves at a faster speed relative to the peripheral speed of the drum and in contact therewith, to cause refurbishment of the drum surface.

Electrostatographic printer for forming an image onto a web and for

The speed of a DC motor is stabilized to correspond to a reference speed by a motor driving control that is instantaneously responsive to the interval between reference pulses corresponding to the reference speed and actual observed pulses corresponding to the actual motor speed.

DC motor speed stabilizing method and apparatus

A method and an apparatus are described for digitization of an image and for transmission to a host device of the digitized image via a buffer memory having a signal storage capacity that is lower than the data content of said digitized image. Different portions of the image are stored in the memory during successive separated periods of time. To this end the image is repeatedly scanned by means of radiation emitted by radiation projecting means that are transported at a constant scanning speed from a boundary outside the image beyond the image portion to be stored.

Method of reading an image in a scanning apparatus having a limited

A method and an apparatus for generating correcting signals for correcting the video output signal of an electro-optical document reading apparatus of the line-wise scanning type are disclosed. The method of the invention employs a successive approximation procedure for determining the correcting factors pertaining to pixels within each scanning line, the checking cycles of the procedures corresponding with each correction word however are nested.

Video output signal correcting method and apparatus

A method and an apparatus are disclosed for producing in a bi-level recording device a composite record from visually distinguishable images by means of a logical EXOR operation calculated on the binary representations of either of said images.

Method and apparatus for producing a composite record from visually

A signal-processing device for transforming a digital image signal, that has been obtained by sampling and digitization of a video signal obtained by line-wise scanning of an original, to a binary image signal wherein zero points of the two-dimensional second difference of the digital video signal are determined in order to detect contrast transitions in the original. Unwanted noise components in the video signal are eliminated by masking the second-difference signal.

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Bonheiden, Belgium

Jean A Van Daele