Canon Finetech Inc.

Canon Kabushiki Kaisha

Masato Kawakami

Yasunori Fujimoto

Takeshi Honma

Takahiro Tsutsui

Hideyuki Ito

Shintaro Suzuki

Yuusuke Sumikawa

Marie Ogata

Yoshihito Fukuda

Kanako Aratani

Ryuta Aoto

A liquid supply apparatus includes a supply passage for supplying a liquid stored in a liquid storage section to a liquid ejection head. The liquid supply apparatus further includes: a region set within a range including an inside of the liquid storage section and an inside of the supply passage, pressure applied to the liquid in the region varying according to an amount of the liquid remaining in the liquid storage section or in the supply passage; a gas chamber communicating with the region in such a manner that a pressure of gas in the gas chamber varies according to the pressure applied to the liquid in the region; and a pressure sensor detecting pressure in the gas chamber.

Liquid supply apparatus and liquid ejection apparatus with contactless detection of liquid remaining amount

An ink jet recording ink including a pigment; water; and water-soluble compounds. The pigment comprises a resin-dispersed pigment dispersed with a (meth)acrylate-based random copolymer having an acid value of 100-160 mgKOH/g. The water-soluble compounds include at least ethylene urea and a water-soluble compound having a hydrophilicity-hydrophobicity coefficient defined by the following equation (A) of 0.37 or less The total content of the water-soluble compounds is 22-50 mass % with respect to the total amount of the ink The content of the ethylene urea is 11.0 mass % or more with respect to the total amount of the ink, and the proportion of the amount of the ethylene urea in the total amount of the water-soluble compounds is 50% by mass or less,Hydrophilicity-hydrophobicity coefficient=((water activity value of 20% aqueous solution)&#x2212;(molar fraction of water in 20% aqueous solution))/(1&#x2212;(molar fraction of water in 20% aqueous solution))&#x2003;&#x2003;Equation (A).

Ink jet recording ink, ink jet recording method, ink jet recording head, and ink jet recording apparatus

An ink jet printing apparatus and an ink jet printing method, whereby high-permeation ink and low-permeation ink are employed to prevent a reduction in optical density is provided. The ink jet printing apparatus controls ejection of ink from print heads, so that only low-permeation ink is ejected onto the edge area of a print medium that is adjacent to a non-printing area, and this time, high-permeation ink is not employed. Further, the ink jet printing apparatus controls ejection of ink from the print heads, so that both low-permeation ink and high-permeation ink are employed for the non-edge area that is adjacent to the edge area, and to perform printing, the low-permeation ink is ejected onto the non-edge area prior to the high-permeation ink.

Ink jet printing apparatus and ink jet printing method

Growing community of inventors

Misato, Japan

Masato Kawakami