Dryer device
OwnerWolfgang Mohr, Nikolaus Groehlinventors
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Abstract
The invention relates to a dryer device for drying printing ink, lacquers or similar coatings. The aim of the invention is to improve a system comprising an electric emitter unit (1) mounted in a printing machine or the like for radiating sheets (2) or web material, with a high drying capacity while at the same time making sure that the surrounding machine parts are heated up as little as possible. To this end, the emitter unit (1) is provided with one or more rapidly starting IR medium-wave emitters (12), preferably IR carbon emitters (12) with a wavelength of radiation substantially in the range of from 2 μm to 3 μm.
Claims18
A dryer device for drying printing ink, paints or similar coatings, having at least one electrical emitter unit (1) that can be mounted in a printing press or the like, for irradiating printed sheets (2) or web material, characterized in that the emitter unit (1) has one or more fast-starting IR medium-wave emitters (12).
The dryer device of one of the foregoing claims, characterized in that the emitter unit (1) is operated during the irradiation process at an electrical power that is slightly reduced compared to the usual electrical power.
The dryer device of one of the foregoing claims, characterized in that the emitter unit (1) can be operated briefly at increased electrical power, for rapidly increasing the emission power.
The dryer device of one of the foregoing claims, characterized in that the dryer device includes a power regulator (3) for regulating the emission power of the emitter unit (1), with at least one sensor (4, 5, 10) for detecting at least one operating parameter that is dependent on the demand or effect of the emission power, and that the power regulator (3) is embodied to increase the emission power to whatever value is required as a function of the operating parameter or parameters and at least partly to reduce it the rest of the time.
The dryer device of one of the foregoing claims, characterized in that the emitter unit (1) has a substantially plane reflector baffle (20) disposed downstream of the emitters (12).
The dryer device of one of the foregoing claims, characterized in that upstream and downstream of the emitter unit (1) in terms of the direction of motion (24) of the sheet material (2) or web material to be dried, respective air gaps (22, 23) are disposed in the cooling air distribution manifold (16), extending transversely to the direction of motion (24) essentially over the entire dimension of the emitter unit (1).
The dryer device of one of the foregoing claims, characterized in that a shielding baffle is disposed between the emitter unit (1) and adjacent parts of the printing press.
Dependencies are inferred from the claim text.