Printing device

The inkjet printing device uses an inertia adjustment mechanism with a flywheel to dynamically shift resonance frequencies, addressing resonance issues and enhancing print quality by adjusting the driven roller inertia, thus enabling flexible operation.

WO2025197270A1 Publication Date: 2025-09-25SCREEN HOLDINGS CO LTD
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Patent Information

Application Number
PCT/JP2025/001281
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-22
Filing Date
2025-01-17
Publication Date
2025-09-25

AI Technical Summary

Technical Problem

Conventional inkjet printing devices experience resonance issues in the transport mechanism, leading to significant tension fluctuations in the print medium, which affects ink ejection accuracy and overall print quality, necessitating restrictive usage conditions to avoid resonance.

Method used

The printing device incorporates an inertia adjustment mechanism with a flywheel and switching mechanism to dynamically adjust the inertia of a specific driven roller, shifting the resonance frequency to prevent resonance without limiting operational conditions.

Benefits of technology

This approach effectively prevents resonance across various usage conditions, ensuring consistent print quality by adjusting the inertia of the driven roller through a gradual process, allowing for flexible operation and improved print medium transport.

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Abstract

A transport mechanism of a printing device (1) has an inertia adjustment mechanism (70). The inertia adjustment mechanism (70) changes the inertia of a specific driven roller (12s). The resonance frequency of a vibration system including the specific driven roller (12s) can thereby be changed. Therefore, the resonance frequency can be shifted in accordance with conditions during use of the printing device (1). Resonance of the printing medium can thereby be avoided.
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