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US 7,465,356 B2Granted
Device and method for coating material
AssigneeKodak Graphic Communications Canada Company
InventorsHeinfried Rudolph, Jorg Heinemann
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AssigneeKodak Graphic Communications Canada Company
InventorsHeinfried Rudolph, Jorg Heinemann
Estimating the term…
The present invention relates to a device and a method for coating preferably webs or strip-like material and in particular to a method and a device for adapting the coating width of such devices. In particular, the present invention moreover relates to the field of liquid coatings by means of slot coating systems. The present invention provides a device and a method in which the coating width is adaptable via limiting means that are movable relative to each other. According to an additional or further preferred embodiment of the invention, the coating width is limited by means of a confining fluid. Preferably, a continuous material web is simulated by means of the confining fluid in the edge area.
A device for adapting coating width of a coating system, comprising a distribution chamber in fluid communication with a coating slot for supplying a coating fluid of a given width onto a substrate, and at least one limiting means limiting the width of the coating slot and the distribution chamber for containing a coating fluid, wherein the at least one limiting means comprises a piston comprising a piston head and piston rod, provided with two spaced-apart sealing elements that seal off the piston against the distribution chamber, wherein the at least one limiting means is movable and is adapted for supplying a confining fluid to the piston head through the piston rod, between the sealing elements and through the coating slot for preventing the coating fluid from laterally distributing within the coating slot and for simulating a continuous material web.
Dependencies are inferred from the claim text.