Method and device for applying a pressure roller to a goods guiding roller

Apparatus for applying a rotationally driven pressure roller (4) onto a rotationally driven goods guiding roller (3), in a stretching equipment for thermoplastic films, which pressure roller (4) is supported in carrier arms (6) that are spaced apart from one another, and whereby each carrier arm is rigidly connected with guide carriages (5a) of at least one equipment-fixed linear guide unit (5), characterized

• in that at least one pneumatically pressurizable first piston-cylinder unit (7) for advancing the pressure roller (4) is provided, which establishes an operative connection between the carrier arms (6) and a lever (9) that is pivotably moveable about an equipment-fixed rotation point (9a),
• in that a pneumatically pressurizable second piston-cylinder unit (8) for carrying out an axis-parallel remaining stroke between the pressure roller (4) and the goods guiding roller (3) and for exerting a pressing force is provided, which is operatively connected with an equipment-fixed point and with the lever (9) with a force-amplifying lever ratio,
• in that an electronic controller (10) is provided for controlling pressurization of the piston-cylinder units (7, 8), with which controller a first control valve (11) allocated to the first piston-cylinder unit (7) and a second control valve (12) allocated to the second piston-cylinder unit (8) is connected in a signal transmitting manner, and
• in that the electronic controller (10) is further connected in a signal transmitting manner with position switches (7a, 7b, 8a, 8b) that are allocated to the piston-cylinder units (7, 8).