Importance

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Abstract

A coater applies ultraviolet curable coating material to the opposite sides of roll film by a double-sided coater which employs offset coating rolls and smoothing bars. A splice detector responds to the occurrence of a splice upstream of the coater and causes the splice region to move through the coater without applying coating material to the splice region, by lifting the emulsion side of the film off of the coating roll as the splice passes and by temporarily and sequentially interrupting the operation of the smoothing bars and the offset applicator roller on the non-emulsion or base side, concurrently with the passage of the splice therepast. In a second embodiment, the film is lifted by lifting bars off of both coating rolls and tension on the film is concurrently decreased in the coater to prevent marking of the surface of the coated film by the final smoothing bars.

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First Claim