A process for relaxation of interlayer sheet is provided which comprises heating the interlayer sheet, followed by leading the heated interlayer sheet over an air-cushion table with regulation of the tension on the interlayer sheet to induce interlayer sheet relaxation and thereafter cooling the relaxed interlayer sheet to the desired temperature for subsequent use. A test signal is applied to the input of the nonlinear device and amplitudes of nth- and mth-order intermodulation products are measured. Another aspect of the invention is a protocol that facilitates secure upload of code in the wireless sensor network. The portion of the candle from which the wick projects is preferably substantially opaque, and the portion of the candle in which the light emitting device is disposed is preferably at least partially light transmissible or translucent, so that the glow of the flame does not interfere with the glow of the light emitting device within the candle. 5\xb0 and not more than 0\xb0 from an R-plane with respect to a direction of a C-axis. The stripper has a rotatable string member operatively connected to the stripping motor.