Doups

DOUPS

Special healds used in the manufacture of gauze and leno fabrics. A doup consists of an ordinary heald termed the " front standard " and a half heald with only one stave termed the " doup heald." The half heald may be at the bottom or the top. In the case of the bottom doup, the twine of the doup heald passes over the eye of the front standard and returns through it. The crossing thread is drawn through the loop so formed, and also through an additional heald termed the back standard. To form the cross-shed the whole of the doup is raised, namely, the front standard and half heald. To form the open shed, i.e., when the crossing thread is on the other side of the standard end, the back standard is lifted, the front standard heald is left down, but the half heald is lifted to allow the warp thread to cross to the other side of the standard warp end (see gauze cloth and design).