US Patent 7430974 Fly sewing machine

A fly sewing machine comprising a fly carrying portion disposed on an upstream side of a fly carrying passage between a fly supply portion and a sewing machine and a carrying speed adjusting portion disposed on a downstream side is disclosed. The fly carrying portion comprises a plurality of carrying roller pairs having driver rollers and supporting rollers disposed vertically opposite each other, and the carrying speed adjusting portion comprises a pair of a drive roller and a supporting roller disposed vertically and roller gap adjusting means for adjusting a gap between the drive roller and the supporting roller By the time a following fly carried from the fly carrying portion is bitten into the gap between the drive roller and the supporting roller of the carrying speed adjusting portion, a predetermined interval is formed between a preceding fly and the following fly.