INK CIRCULATION SYSTEM AND INKJET PRINTING APPARATUS
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United States of America Patent
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Issued Date -
Sep 28, 2023
app pub date -
Aug 20, 2021
filing date -
Sep 23, 2020
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Abstract
A technique for making the amount of ink to be calculated appropriate in accordance with the amount of ink to be ejected from heads is provided. An inkjet printing apparatus includes a supply tank, a return tank, a first connecting pipe, a second connecting pipe, a head, a pressure-difference producer, an ejection-amount predictor, and a pressure controller. The first connecting pipe transfers ink in the supply tank to the return tank. The second connecting pipe returns ink in the return tank to the supply tank. The head is interposed in the first connecting pipe. The pressure-difference producer sends ink from the supply tank to the return tank through the first connecting pipe. The ejection-amount predictor predicts the amount of ink to be ejected at a time to come after the present time from the head. The pressure controller controls the amount of ink to be supplied from the supply tank to the head, by controlling the pressure-difference producer in accordance with the predicted amount of ink to be ejected.
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