Double-sided coating device

摘要

A double-sided coater 1 includes a first coater 5a coating a surface not contacting a guide roll 4b, and a second coater 5b coating another surface contacting the guide roll 4b. Each of the first and second coaters 5a and 5b includes a gravure kiss coater including a small-diameter gravure roll 10 and a coating liquid supplier 30. The guide roll 4b guides a substrate S from a vertical direction to a horizontal direction to allow the first coater 5a to coat the substrate S from a lateral point while the substrate S travels vertically, and to allow the second coater 5b to coat the substrate S from a lower point while the substrate S travels horizontally.

主权项

1. A double-sided coater continuously coating two surfaces of a traveling substrate, the coater comprising:
a first guide roll supporting and guiding the substrate to allow the substrate to travel vertically upward; a second guide roll located downstream of the first guide roll on a same surface of the substrate as the first guide roll, wound with the substrate, and guiding a traveling direction of the substrate, with the substrate having tension; a first coater located next to and upstream of the second guide roll, and coating one of the surfaces not contacting the second guide roll; a second coater located next to and downstream of the second guide roll, and coating the other one of the surfaces contacting the second guide roll; and a floating drier drying the substrate with the coated surfaces, wherein each of the first and second coaters is a gravure kiss coater including
a cylindrical small-diameter gravure roll having an outside diameter within a range from 45 mm to 150 mm, and including, on an outer peripheral surface, a coating section contacting the traveling substrate while floating, andan enclosed coating liquid supplier capable of being placed transversely, the coating liquid supplier extending along the small-diameter gravure roll, and supplying coating liquid to the coating section, in a transverse position, an uppermost end of at least the coating liquid supplier of the second coater is located under a tangent line tangent to an upper end of the small-diameter gravure roll as seen along a rotational axis of the small-diameter gravure roll, and both the first and second coaters are next to the second guide roll while being placed transversely, and the second guide roll guides the substrate from a vertical direction to a horizontal direction to allow the first coater to coat the substrate from a lateral point while the substrates travels vertically, and to allow the second coater to coat the substrate from a lower point while the substrate travels horizontally.