Damp ribbon or lace would be placed over the tube and the ribbon or lace could then have the appropriate folds/pleats put into it.
19th century goffering iron cast iron
Antique Tailors Iron Large Iron Door Stop 19th Century Carron Iron Clothes Iron
A 19th Century Wrought Iron Double Candle Holder Candlestick English early 19th
A 19th Century Cast Iron Flat Iron marked Carron 6
Antique Brass Flat Iron With Slug. 19th century clothes iron