Image heating device

ES3078019T3Undetermined Publication Date: 2026-09-08CANON KK (100 00)
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Patent Information

Application Number
ES2024159309T
Authority / Receiving Office
ES · ES
Patent Type
Patents
Current Assignee / Owner
Priority Date
2018-11-09
Filing Date
2018-11-09
Publication Date
2026-09-08
Estimated Expiration
2038-11-09

AI Technical Summary

Technical Problem

Existing image heating apparatuses struggle to effectively cool the non-contact regions of a rotatable member when small-size papers are processed, leading to excessive temperature rise and inadequate compatibility with various paper widths.

Method used

An image heating apparatus with an air blowing cooling mechanism featuring ducts, fans, and shutter members to regulate airflow and cool the non-sheet-passing regions, ensuring temperature control across different paper widths.

Benefits of technology

The apparatus achieves efficient temperature regulation and compatibility with various paper sizes by effectively cooling the non-contact regions, preventing overheating and ensuring consistent image fixing quality.

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Abstract

The invention relates to an image heating apparatus (A) comprising: a first rotating element (1) and a second rotating element (1d) configured to form a contact zone (5) in which a toner image is fixed onto a recording material (P); an air blowing mechanism (30); a duct (32L) configured to guide air from said air blowing mechanism (30) to one end of the first rotating element (1) longitudinally; and an opening and closing mechanism (34L) configured to open and close an air blowing orifice (31L) of the duct (32L). Said opening and closing mechanism (34L) includes several sealing elements (36L, 37L) configured to close the air blowing orifice (31L) together.The plurality of sealing elements includes a first sealing element (36L) and a second sealing element (37L) positioned such that the first element (36L) and the second element (37L) overlap at least partially when the air blow-through orifice (31L) is open. When the air blow-through orifice (31L) is closed, with respect to the longitudinal direction of the first rotating element (1), the first sealing element (36L) is located on one side of the central portion and the second sealing element (37L) is located on one side of the end portion. The second sealing element (37L) closes the air blow-through orifice (31L) by moving relative to the first sealing element (36L).
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