摘要:
A toner for electrostatic latent image development includes at least a binder resin, a colorant, a charge control agent, and a release agent. The release agent contains a synthetic ester wax and a natural ester wax. When a toner sample is measured by a differential scanning calorimeter in a way that the toner sample is heated from 30° C. to 170° C. at a rate of 10° C./min followed by cooling to 30° C. at a rate of 10° C./min and is then re-heated from 30° C. to 170° C. at a rate of 10° C./min, a fusion-starting temperature TB, a lower endothermic peak temperature T1 derived from one ester wax, an intermediate endothermic peak temperature T2, and a higher endothermic peak temperature T3 derived from another ester wax are respectively a certain temperature, and are observed during the re-heating.
摘要:
A silencer attenuating a noise from a noise source to be ventilated of this invention comprises a machine compartment with a one-dimensional duct configuration whose sectional dimension is sufficiently small in comparison with the wavelength of the noise to be attenuated, a compressor and/or other machinery disposed within the machine compartment, an opening for dissipation of heat as disposed in a wall of the machine compartment and opening in a direction generally perpendicular to the direction of advance of sound within the machine compartment, a vibration pickup for detecting the vibration of the machinery corresponding to the output noise of the machinery, and a control circuit for processing output signals from the vibration pickup to drive a sound generator such as a speaker. The sound generator outputs a controlling signal dependent on the machine noise to cancel the noise about to emerge from the machine compartment.