9 [ electrically operated apparatus for checking, controlling, measuring, or regulating operations in the printing, paper, textile or packaging industries; apparatus for checking sheet travel and double sheets, apparatus for checking front and side sheet registration, apparatus for recognizing format, apparatus for controlling printing, moisturizing and inking of sheets and webs, dusting apparatus, apparatus for controlling stacks, apparatus for controlling web edges, apparatus for preventing web breakage, apparatus for recognizing adhesive joints, mechanical devices for catching printed sheets, paper, cardboard and plastic sheets; apparatus for checking folds and copies for the graphics industry; apparatus for checking thread breakage and folds; apparatus for controlling webs of material and bobbin monitors for the textile industry; dusting apparatus for single-color and multicolor printing machines; apparatus for eliminating, producing and reducing electrostatic charges in printing machines, cutting and folding machines, laminating and coating machines, filling machines, shrinking machines, film blowing and film processing machines, machines for manufacturing sealed bags, cutting machines, driers, warping machines and bobbin creels; apparatus for processing, metering, monitoring and distributing liquids; and parts therefor ]