E.i. Dupont De Nemours and Company

Helmut Luetke

Dietmar Dudek

Carl Bernard Arnold

Andreas Koch

Robert A McMillen

Volker Struewe

Rolf Schwan

Ib Vestergaard

Allan Banke

Soren Michael Juul Jorgensen

Soeren Joergensen

The invention pertains to an exposure apparatus, a method for exposing a photosensitive element to radiation using the exposure apparatus, and a method for preparing a printing form from the photosensitive element. The exposure apparatus includes a base assembly having an exposure bed that supports the photosensitive element, and a lamp housing assembly having two or more lamps. The lamp housing assembly includes an air distribution assembly having an air chamber that is disposed adjacent to the lamps and pressurized to provide uniform distribution of air exiting the air chamber to impinge a backside of each of the lamps. The air exiting the chamber and impinging the lamps is controlled by monitoring the temperature of the lamps and/or the irradiance emitting from the lamps.

Exposure apparatus and a method for exposing a photosensitive element and a method for preparing a printing form from the photosensitive element

The invention pertains to an exposure apparatus, a method for controlling a photosensitive element to radiation using the exposure apparatus, and a method for exposing a photosensitive element to radiation. The exposure apparatus includes a base assembly having an exposure bed that supports the photosensitive element, and a lamp housing assembly having two or more lamps. The lamp housing assembly includes an adjustable ballast connected to at least one of the lamps to adjust power received by the one lamp, a sensor for measuring irradiance impinging the exposure bed; and a controller that adjusts the adjustable ballast based on comparison of the measured irradiance to the target irradiance, thereby adjusting the irradiance emitting from the lamp to the target irradiance.

Exposure apparatus and a method for controlling radiation from a lamp for exposing a photosensitive element

This invention provides an apparatus for treating and a process for positioning a cylindrically-shaped element. The apparatus includes means for supporting the element adapted to contact a first part of an interior surface of the element, the supporting means having an axial length; and means for moving the element along the axial length of the supporting means.

Apparatus and process for positioning a cylindrically-shaped printing element

The invention pertains to a method and apparatus for exposing a cylindrical print sleeve. The method and apparatus can accommodate exposing various cylindrical print sleeves having different sleeve lengths and/or diameters. The apparatus includes a sleeve support for supporting the cylindrical print sleeve at one end, a plurality of light tubes supported in a longitudinal orientation, and a means for positioning the light tubes along one of a plurality of concentric rails to form a substantially circular wall of light tubes about the print sleeve.

Apparatus and process for exposing a printing form having a cylindrical support

The invention pertains to an apparatus and a process for forming a printing form from a photosensitive element having a cylindrical support, and in particular, to an apparatus and a process for thermally treating the photosensitive element to form a relief pattern and particularly to form a cylindrically-shaped flexographic printing form. The apparatus and process includes supporting the cylindrical support to accommodate thermal treating of photosensitive elements with various sizes of the cylindrical support.

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Frankfurt am Main, Germany

Helmut Luetke