Patent ID: 7900678

Claim:
An apparatus for applying at least one surface portion of a transfer layer of a transfer film to a web of material, comprising: at least one support roller and at least one pressure roller for pressing the web of material and the transfer film against the at least one support roller, wherein the at least one pressure roller is resiliently supported by at least one resilient arrangement and wherein the apparatus has at least one adjusting device for varying a spring rate of the at least one resilient arrangement and thus for varying a pressure contact force of the at least one pressure roller against the at least one support roller, wherein the at least one pressure roller is pneumatically or hydraulically resiliently supported and wherein the at least one resilient arrangement is formed by a diaphragm spring, wherein the diaphragm spring has a diaphragm chamber the diaphragm chamber divided by a diaphragm into a primary side and a secondary side and a piston rigidly connected to the diaphragm on the secondary side transmitting a spring force to the at least one pressure roller, wherein the diaphragm spring on the secondary side has a sealing arrangement which protects the diaphragm spring from the ingress of dust and corrosive media.