US Patent 4,846,229 (Franz X. Starlinger-Huemer, granted 11 July 1989) describes a circular loom adapted to weave leno fabric, mainly tubular fabric from narrow plastic strands for sacks. Pairs of inner and outer partial healds carry comb-like guides with thread eyes. After each shedding motion, displacement means shift the healds laterally so that warp threads jump across their neighbors to form the leno crossing. The scan includes an abstract, claims, description and three sheets of patent drawings, in both a USPTO web printout and the printed patent.