Patent ID: 8438988

Claim:
A powdering device for powdering a printed sheet, comprising: a storage container for storing a powder; and an appropriate-powder-amount distribution mechanism for feeding an appropriate amount of the powder into an air flow for sending the powder, the appropriate-powder-amount distribution mechanism being disposed below the storage container, wherein the appropriate-powder-amount distribution mechanism includes: an opening which is formed below the storage container, and into which the powder from the storage container is fed; a powder placing member which is rotated about a vertical axis, which has an axisymmetrical shape about a rotational axis, and which has, in a part thereof, a placing section on which the powder fed from the opening is placed; a first scraping member for making, uniform, the amount of the powder placed on the placing section of the powder placing member in association with the rotation of the powder placing member about the vertical axis; and a second scraping member for scraping off, into the air flow, the powder caused to remain on the placing section of the powder placing member by the first scraping member, in association with the rotation of the powder placing member about the vertical axis, wherein the placing section of the powder placing member has a horizontal placing surface, wherein the placing section of the powder placing member has a staircase-like outer shape having horizontal placing surfaces and vertical surfaces, the first scraping member has a linear scraping surface connecting intersections of the horizontal placing surfaces and the vertical surfaces of the placing section of the powder placing member, and the second scraping member has a scraping surface coinciding with the staircase-like outer shape of the placing section of the powder placing member.