Abstract: A material storage apparatus includes: a material storage portion configured to store scraps of paper and including a material container and a lid, the material container having a material inlet enabling the scraps of paper to be input into the material container, the lid being configured to open and close the material inlet; a humidification portion including a first blower and configured to supply humidified air into the material container; and an air circulation portion including a second blower and configured to suck air in the material container, and when the lid is open, the material container has a negative pressure.

Abstract: The present invention provides a paging amplifier for a cellular phone, which includes an input/output terminal connected to an earphone microphone terminal of the cellular phone. An output terminal of the paging amplifier is connected to an external speaker. The paging amplifier includes a handset that has a microphone and a speaker, and a detector that detects whether the handset is in a predetermined position. A calling sound of the cellular phone is input to the paging amplifier through the earphone microphone terminal and the input/output terminal. The paging amplifier amplifies the input calling sound and outputs the amplified calling sound to the external speaker through the output terminal. The external speaker receives and broadcasts the amplified calling sound. When the handset is removed from the predetermined position, the detector detects the action and stops the calling sound.