Patent · US Active

Image forming apparatus having duct with convex shaped filter

US11543771B2 · kind B2 · utility

0Cited by

2References

12Claims

0Family size

Assignee

Canon Kabushiki Kaisha · JP

Inventors

Koji Nojima · Abiko, JP
Kota Aoki · Toride, JP

Key dates

Filing date	Mar 3, 2022
Grant date	Jan 3, 2023
Priority date	—
Expiry date	Mar 3, 2042

Classification

Technology area (CPC G)Physics
CPC primaryG03G2221/1645
WIPO fieldOptics
WIPO sectorInstruments

Abstract

An image forming apparatus includes an image forming unit, a fixing unit, a heating portion, a duct with a suction opening and an exhaust opening, a fan connected to the exhaust opening and a sheet-like filter provided with a base layer and a collecting layer laminated on the base layer. The filter is disposed so that the collecting layer is inside and the base layer is outside and the filter becomes a convex shape to the outside from the suction opening. When a width of the suction opening is d1, and a maximum height of the filter from an imaginary surface passing through an edge portion of the suction opening is L, the filter satisfies 0.003<L/d1<5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.