What's the difference b/w an industrial merrow, hemmer, & overlock apparatus?
Merrow is a brand name often used for any industrial overlocker -- much approaching Kleenex is used for any facial tissue and Xerox for any photocopy.
Hemmers come in several flavors, including overcasting, blind hemming, rolled hemming, etc.
Overlocker is used for what home sewing in the US call a serger.
Here's Merrow's website... they've got one of the more informative ones on what their various machines can do:
One of the bigger divergences between home sewing machines or sergers and industrial machines is that home sewing machines and sergers usually can do admin multiple functions... for instance most home sewing machine makes straight stitches, make buttonholes, can zigzag, can blindhem. In the industrial world, you'd buy a straight stitcher, a different machine for making buttonholes, still another for making blind hem. Source(s): 50 years of sewing