This is my blind hem machine, one of four sewing machines I own. It was handy when I sewed made-to-order curtains for clients of interior designer pal Benjamin Garduño, our "Minister of Design." (Each machine has a specific purpose: standard sewing; serger; embroidery; and hems. I've been fantasizing about a needle felting Embellisher machine too, but it would be difficult for Tien to understand a purchase of a machine that requires no thread!)
The hem machine's needle is curved for taking up just a thread or two of fabric on a pre-folded and pressed hem to invisibly sew a chain stitch. The motor is powerful -- it feels like a race horse that wants to take off on its own.
I'm sewing aprons and the hems look perfect. Here is a sample of the face fabric hem and the back side hem. Pretty cool, right?