INK TANK FOR REGULATING INK PRESSURE

WO 18/ 15 37 03 Al (12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) (19) World Intellectual Property Organization International Bureau (43) International Publication Date 30 August 2018 (30.08.2018) WIP0 I PCT Hu omit VIII °nolo oliolionomiono oimIE (10) International Publication Number WO 2018/153703 Al (51) International Patent Classification: B41J 2/175 (2006.01) B41J 2/19 (2006.01) (21) International Application Number: PCT/EP2018/053367 (22) International Filing Date: 09 February 2018 (09.02.2018) (25) Filing Language: English (26) Publication Language: English (30) Priority Data: 62/463,440 24 February 2017 (24.02.2017) US (71) Applicant: MEMJET TECHNOLOGY LIMITED [IE/IE]; 61/62 Fitzwilliam Lane, Dublin, 2 (IE). (72) Inventors: MCAULIFFE, Patrick; 6-8 LYON PARK ROAD, NEW SOUTH WALES, 2113 NORTH RYDE (AU). MALLINSON, Samuel; 6-8 LYON PARK ROAD, NORTH RYDE, NEW SOUTH WALES 2113 (AU). MCBAIN, Geordie; 6-8 LYON PARK ROAD, NORTH RYDE, NEW SOUTH WALES 2113 (AU). (81) Designated States (unless otherwise indicated, for every kind of national protection available): AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW. (84) Designated States (unless otherwise indicated, for every kind of regional protection available): ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG). (54) Title: INK TANK FOR REGULATING INK PRESSURE 23 FIG. 1 (57) : An ink tank for an ink delivery system includes: a first ink chamber having an ink inlet port and an ink outlet port; a second ink chamber having a gas port open to atmosphere; and a diffusion tube interconnecting the first and second ink chambers. The first ink chamber has a smaller volume than the second ink chamber and the diffusion tube is configured to minimize diffusion