Abstract: A downwardly open applicator housing, surrounding and mounted on a dyestuff-supplying tube within a cylindrical printing screen, carries an elastic diaphragm which spans its lower end in a slack state so as to hang down with a convex underside under the weight of a load of dyestuff in the housing and a pair of bars bearing upon the diaphragm from above. The central region of the diaphragm, flanked by the weighting bars, has a series of axially spaced openings for the discharge of the dyestuff; a flexible but substantially inextensible reinforcing strip of low-friction material, having a longitudinal slot registering with these openings, is bonded to the underside of the diaphragm to facilitate relative sliding of the screen and seal the gap region against leakage of dyestuff onto the inner screen surface. The upper diaphragm surface may have gap-bridging elements such as threads or wires bonded thereto as additional reinforcements.

Abstract: A dyestuff applicator inside a cylindrical printing screen comprises an elongate hollow body with a bottom portion contacting the inner screen surface and an outlet for ink supplied to that body through one of two tubular extremities thereof, these extremities being clamped in respective mountings with their axes disaligned to generate stresses counteracting the forces of gravity and friction which tend to deform the outlet from its linear shape. Each end mounting may comprise a pair of axially spaced rigid rings with toroidal inner surfaces, of adjustable relative elevation, or an elongate sleeve cradled in a vertically adjustable bearing frame in which the sleeve can be immobilized at a desired inclination to the horizontal and the vertical. The sleeve may have a yieldable lining or be braced by damping springs and dashpots against oscillations of the applicator body.