Device to produce an adjustable fluid jet

A device for producing an adjustable fluid jet, for an application of a fluid onto a substratum, the device being fitted with a jet head carrying a jet having an opening at one end of a flow path to be supplied with the fluid, the opening is fitted with an elastic element having a through recess connected to the flow path, the elastic element is positioned between a jet tube and a mating thrust bolt that are adjustable in relation to each other, a control device arranged on the jet head, the jet tube tapers toward an end and receives the elastic element, the control device comprising a piston arrangement with a through bore communicating with the through recess of the elastic elements, said thrust bolt entering the jet tube in a fixed manner at the jet head, a following control piston that is controlled by pressure from a pressure chamber, the pressure chamber is supplied with a pressure medium on an opposite side of the control piston from the thrust bolt, and a sealing plug that projects from an opposite side of the thrust bolt, said sealing plug being in a sealing relationship with an opening that communicates with the pressure chamber and is supplied with the fluid, said sealing plug having a smaller diameter than said opening, said jet tube comprising a flange sealing a cylinder chamber within the jet head, said cylinder chamber receiving said control piston therein.