An apparatus for and a method of removing a moire pattern of a digital imaging device are provided. By means of the process according to the invention, better operation of such a fuel cell is possible, and they exhibit an improved lifetime. Either section can be rolled and hooked to itself to form a cylindrical tunnel, whether hung from the door or detached. The reinforcing member may be secured to selected door panels by conventional mechanical fasteners. A sum or mean of a feature of the weighted signals is calculated to produce a higher quality electromyocardiographic signal. Frame rates do not need to be increased, which makes twists of liquid crystal more stable.