Patent ID: 11920863
Assignee: UNIVERSAL CAN CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC F  B | IPC B  F

Claim 6:
7. The drying device according to claim 5,
wherein, in the plural areas, a preheating zone, a temperature increasing zone, and a holding zone are sequentially provided along a conveying direction from an upstream side,
the protrusions in the preheating zone have a rectangular shape when seen from a discharge direction, and the ratio of the area of the protrusion to the area of the gap between the protrusions is 1:2, and
the protrusions in the temperature increasing zone and the holding zone have a triangular shape when seen from the discharge direction, and the ratio of the area of the protrusion to the area of the gap between the protrusions is 1:3.