The present invention relates to a fixing member that can apply sufficient power to press toner particles on a raised portion of a paper surface while also maintaining good conformability to a depressed portion of the paper surface that is an advantage of a surface layer including a soft rubber layer. The ends of the cutting device can be actuated above ground. An active area is disposed between the first and second memory cell structures. An economically produced two-piece piston results with a resilient sleeve between both screwed piston pieces which exerts a pre-tensioning and thus provides security for the screw connection.