| 摘要 |
PROBLEM TO BE SOLVED: To feed a plurality of corrugated fin material having various pitches in regard to a feeding unit in which a pitch of corrugated wave-shaped fin material is formed to approximate the same as the pitch of a corrugated fin to be manufactured. SOLUTION: The total tooth height (h) of a tooth profile 17 of a pair of a feeding roll is smaller than the total tooth height (h1) of tooth profiles 19 and 21 of a corrugating cutter forming corrugated fin material 23 in the feeding unit.
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