IMAGE FORMATION APPARATUS AND IMAGE FORMATION METHOD

• Main Authors: HIROKAWA YUYA, SAIGA TAKUYA, NAKAGAWA TOMOHIRO, HAGIWARA HIRONORI, UMEMURA KAZUHIKO, YAMAMOTO CHIKAU, TAMURA RISA
• Format: Patent
• Language: English; Japanese
• Published: 13.04.2023
• Subjects: CORRECTION OF TYPOGRAPHICAL ERRORS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

To provide an image formation apparatus which can efficiently remove air bubbles in a liquid discharge head and a flow channel communicating with the liquid discharge head, stabilize the discharge performance and output a high-definition image.SOLUTION: An image formation apparatus comprises: ink which contains water, a pigment and a siloxane compound; a liquid discharge head 108 which discharges the ink; a main tank 101 which stores the ink; and a sub tank 120 which is connected with the main tank and the liquid discharge head. The sub tank comprises: a positive pressure sub tank 103 which supplies the ink to the liquid discharge head; and a negative pressure sub tank 102 which recovers the ink from the liquid discharge head. The difference between the pressure of gas in the positive pressure sub tank and the pressure of gas in the negative pressure sub tank is between 2 kPa and 30 kPa.SELECTED DRAWING: Figure 1 【課題】液体吐出ヘッドや液体吐出ヘッドに連通する流路の気泡を効率的に除去することができ、吐出性を安定化させ、高精細な画像を出力することができる像形成装置を提供する。【解決手段】水、顔料及びシロキサン化合物を含むインクと、前記インクを吐出する液体吐出ヘッド１０８と、前記インクを収容するメインタンク１０１と、前記メインタンク及び前記液体吐出ヘッドに接続するサブタンク１２０と、を備える像形成装置であって、前記サブタンクは、前記液体吐出ヘッドに前記インクを供給する正圧サブタンク１０３と、前記液体吐出ヘッドから前記インクを回収する負圧サブタンク１０２と、を有し、前記正圧サブタンクの内部の気体の圧力と、前記負圧サブタンクの内部の気体の圧力との差が、２ｋＰａ以上３０ｋＰａ以下である。【選択図】図１