Abstract: A folding device folds waistband ends into the waistband and the device moveable along with folding tools, clamping tools and engagement fingers in a way which allows the fingers to be inserted between layers of the waistband and moved the working area of a bar tacking machine, while clamping tools and folding tools are moved away from the finger so that they do no impede the inserting process. The control of the fingers and folding tools of the folding device is made more simple and economical by the use of control cams.

Abstract: A rotary hook for a sewing machine has a rotatable hook drive shaft driving a hook body in cooperation with a reciprocating needle which moves toward and away from the rotary hook. The hook body has a revolving rotary hook tip which is movable in a path relative to the needle and is engageable with the thread presented by the needle. The rotary hook includes a thread deflecting shoulder to enlarge the thread to form a needle thread loop, includes a case holder having an annular guide rib and a pin extending axially outwardly of the holder. A bobbin case has a central hollow sleeve into which the pin extends and a latch engageable with the pin to hold the case holder to the bobbin case. The case each holder and the bobbin case have a sidewall with interiors which are in substantial alignment. The bobbin case holder has a rearwall formed as a substantially truncated cone which is eccentric to the guide rib and the bobbin case has an annular sidewall and a frontwall have an arched mushroom shape.