A system is provided for shifting, according to an amount of stacked sheets that has been stacked in a sheet stacking device, a state of a power to be supplied to the sheet stacking device from a first power state to a second power state where power consumption is less than that in the second power state. and at least one soft resin having a melting point or softening point between \u221210\xb0 C. The reinforcement resists against deformation due to cracking, splitting etc. If so, the operands are loaded into the execution unit and the instruction executes. Once the device is in place, the opposing magnetic serrations are permitted to coapt, closing the opening and occluding the orifice of the neck in a generally linear line of closure.