Annette,
I've got a really nice Kenmore but their isn't a "blind hem" stitch on the built in cams. And the only one I can find on the replaceable cams is a stretch stitch.
I suppose I could be missing something. I'll check the manual again.
However it's also a flat bed.
I just dug out the 4622A and it's blind hem looks weird. Not to mention it's having top tension problems. Phooey!
Joe