Eastman-kodak Company

Lars Seimetz

Domingo Rohde

Frank-Michael Morgenweck

Knut Behnke

Hans-Otto Krause

Detlef Schulze-Hagenest

Dinesh Tyagi

Bernd Geck

José Manuel Catalá-Civera

Oliver Klemp

Toner images applied on the first-side and on the second-side of a substrate are fixed together by microwaves, by being heated to a final fixing temperature, and that the toner image applied on the first-side is prefixed by microwaves before a toner image on the second-side is applied, with the toner image of the first-side being heated to a prefixing temperature that is lower than the final fixing temperature.

Fixing of toner images for duplex printing

It is an object of the present invention to provide a high-quality printed image in a printing machine. To achieve this, a method for adjusting a fusing deviceof a digital printing machine has been provided, in which case microwave signals of a specific frequency or frequency range are directed at a printing material, a change between the microwave signals reflected by the printing material and the emitted microwave signals is detected, and in which case the fusing device is adjusted based on the change between said microwave signals. Furthermore, a measuring devicefor a printing machine is provided, said device preferably being used for carrying out the said method, whereby the measuring device is configured so as to detect a change between a microwave signal reflected by the printing materialand a microwave signal directed at said printing material.

Method for adjusting a fusing device of a digital printing machine by determining the humidity of printing material and measuring device to detect the reflectance of microwave signals at a print material

Guiding a printing medium that is being conveyed along a travel path in a printing machine, whereby the printing medium is not making contact along at least one edge. A stream of sucked air () is directed at least partially outward, with respect to at least one edge () of the printing medium. A printing media guide with at least one air suction mechanism () for sucking air out of the area of the travel path of the printing medium () in order to create a suction air stream () is directed at least partially outwards.

Process for guiding printing media and printing media guide

A microwave arrangement for affixing the toner onto a printing material by heating, wherein a resonator chamber for feeding printing material therethrough includes at least one element, which extends into the resonator chamber and is used for tuning the resonance state in the resonator chamber. The element includes at least a first portion of a material with properties that essentially do not absorb the microwave radiation and a second portion of a material with mechanically stable properties and a slightly higher absorption of the microwave radiation than the first portion.

Microwave arrangement with resonance state tuning for affixing toner onto printing material

Handling a printing medium in a microwave fuser mechanism of a printing machine so as to prevent damages and disruptions that can occur because of the presence of condensed water. The invention is achieved by removing moisture from the microwave mechanism and by, at least, supporting conveyance of the printing medium by flowing air, and also by preventing moisture from being conveyed into other parts of the microwave mechanism.

Device and process for handling printing media inside a microwave mechanism

Adjusting a gloss for a print image by adjusting the cooling of the print image. Further, a toner for a printing press adjusting gloss by adjusting cooling includes 1% to 30% aliphatic hydrocarbons, aliphatic acids, aliphatic alcohols or their salts, or olefinic hydrocarbons.

Adjusting gloss for a print image

A method and an apparatus for preventing damage inside a printing machine caused by the radiation of microwaves emanating from microwave mechanisms. Undesired effects of the microwave radiation are automatically detected and then limited by countermeasures. Special provision is made for detecting an electrical discharge, or smoldering or burning of a printing medium inside the microwave mechanism, and then initiating suitable countermeasures.

Method and apparatus for preventing fire in printing machines

Heating a printing substance and/or toner, in an electrophotographic printer, with a standing microwave formed by at least one cavity resonator, with the printed matter being caused to move through the resonator gap. The power distribution of the microwave applied by the resonator is shaped and configured for specific application requirements.

Microwave cavity resonator for heating printing substance and/or toner

Fixing toner on a print substrate in printers a cooling device is provided for cooling the sheet with a coolant after fixing the toner to the sheet, the cooling device having a flow passage for discharging the coolant onto the sheet the flow passage converging to increase coolant velocity.

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Achterwehr, Germany

Lars Seimetz