Printing system having a damper for changing vacuum suction through a vacuum plenum and related devices, systems, and methods.

JP7833310B2Active Publication Date: 2026-03-19XEROX CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2022-03-07
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

Inkjet printing systems experience unintended image smudging due to airflow induced by vacuum suction, particularly near the edges of printing media, caused by uncovered holes in the media transport device, leading to inaccurate droplet placement and reduced printing precision.

Method used

An airflow control system with adjustable dampers in the vacuum plenum dynamically adjusts impedance to manage airflow and maintain optimal vacuum pressure, reducing transverse flows and ensuring precise droplet placement by controlling the vacuum suction based on the detected state of the printing system.

Benefits of technology

The solution effectively reduces image blurring and smudging by ensuring that satellite droplets land at their intended locations, maintaining printing precision and efficiency while adapting to varying printing conditions.

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Abstract

To provide devices capable of transporting print media with proper suction.SOLUTION: A printing system 100 comprises one or more print heads arranged to eject ink to a deposition region. Print media are held by vacuum suction in contact with a movable support surface, which transports the print media though the deposition region. The vacuum suction is communicated from a vacuum source to the movable support surface via a vacuum plenum. An airflow control system comprises one or more dampers arranged in the vacuum plenum to control the airflow between the vacuum source and the movable support surface. The dampers have an adjustable impedance to the airflow through the damper. The airflow control system is configured to adjust the impedance of the damper based on a detected condition of the printing system. A detected condition of the printing system may include, for example, a sensed pressure in the vacuum plenum.SELECTED DRAWING: Figure 2
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Citation Information

Patent Citations

  • Vacuum drum for printing and duplex printer

    JP2001514107A

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    JP2007152762A

  • Liquid jet device

    JP2015193094A

  • Printing systems and associated structures and methods having ink drop deflection compensation

    US20200361225A1