On-demand operation of a flexographic coating unit
AssigneeTresu A/S
InventorsMads Kylling, Marko Ryynänen, Erik Gydesen, Petri Sirviö
Life of this patent
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Abstract
A coating unit is located after a sheet-fed digital printer on a manufacturing line. As a response to a workpiece entering the coating unit from the printer, coating substance is dosed onto a plate cylinder, and said plate cylinder is rotated to transfer said coating substance onto the workpiece, which is then transferred further on the manufacturing line. As a response to a first time limit expiring after transferring the workpiece further without a subsequent workpiece entering the coating unit, the rotation of the plate cylinder is stopped.
Claims15
A method for operating a coating unit located after a sheet-fed digital printer on a manufacturing line, comprising the steps of:
- a) as a response to a workpiece entering the coating unit from the printer, dosing a coating substance onto a plate cylinder, rotating said plate cylinder to transfer said coating substance onto said workpiece, and transferring said workpiece further on said manufacturing line, and
- b) as a response to expiration of a first time limit measured from the time that said work-piece has been transferred completely out of the coating unit without a subsequent workpiece entering the coating unit, stopping the rotation of the plate cylinder.
A coater adapted for use after a sheet-fed digital printer on a manufacturing line, comprising:
- a coating unit with a plate cylinder for transferring coating substance onto workpieces,
- a coater controller for controlling the rotation of said plate cylinder, wherein
- the coater comprises a timer coupled to said coater controller and configured to measure time that has passed since a workpiece was transferred completely out of the coating unit on said manufacturing line, and
- said coater controller is configured to stop the rotation of the plate cylinder as a response to expiration of a first time limit measured by said timer from transference of said workpiece completely out of the coating unit without a subsequent workpiece entering the coating unit.
Dependencies are inferred from the claim text.