SYSTEM AND METHOD FOR PRINTING INK IMAGES IN ACCORDANCE WITH SUSTAINABILITY GOALS

    公开(公告)号:US20250065631A1

    公开(公告)日:2025-02-27

    申请号:US18453866

    申请日:2023-08-22

    Abstract: An inkjet printer includes a waste ink treatment system and a humidification chamber to separate waste ink produced by a printhead maintenance station into solid ink pigment particles and a solvent stream and use the solvent stream to maintain inkjets in the printheads of the inkjet printer in operational status. The waste ink treatment system mixes the waste ink with a metal salt to precipitate the solid ink pigment particles out of the waste ink. The solvent stream remaining after the precipitation of the pigment particles is humidified and directed to air baffles positioned on opposite sides of each printhead in every other printhead module in the process direction. A kit is provided to retroactively modify an existing inkjet printer to treat the waste ink and use the solvent stream to maintain the operational status of the inkjets in the printheads of the inkjet printer.

    SYSTEM AND METHOD FOR OPERATING AN INKJET PRINTER TO ATTENUATE INK DRYING IN THE INKJETS DURING PRINTING OPERATIONS

    公开(公告)号:US20230286261A1

    公开(公告)日:2023-09-14

    申请号:US17654459

    申请日:2022-03-11

    CPC classification number: B41J2/04508 B41J2/04586

    Abstract: A method of inkjet printer operation produces a sneeze pattern having a uniform sneeze pattern portion and a tapered area portion within the uniform sneeze pattern to operate inkjets in the printer to eject ink drops within an image area of media sheets passing through the printer to maintain the operational status of the inkjets. A dynamic threshold is applied to a portion of an uniform sneeze pattern to produce the tapered area within the uniform sneeze pattern. The dynamic threshold is changed as a function of distance between a pixel in the portion of the uniform sneeze pattern and the closest edge of an image area of the media sheet on which the tapered area of the sneeze pattern is to be printed. A second threshold can also be changed to alter a volume of ink associated with a pixel in the tapered area within the uniform sneeze pattern.

    In-situ evaluation of curing of ink compositions via absorbance spectroscopy

    公开(公告)号:US10604594B2

    公开(公告)日:2020-03-31

    申请号:US16459802

    申请日:2019-07-02

    Abstract: A method for evaluating curing in an ink composition comprises depositing an ink composition on the surface of an object via a direct-to-object inkjet printing system to form a film thereon, the ink composition comprising a photoinitiator capable of initiating a free radical polymerization process in the ink composition upon the absorption of light to cure the deposited film; exposing, in-situ, the deposited film to light generated by a first source of light under conditions which initiate the free radical polymerization process to cure the deposited film; exposing, in-situ, the cured film to light generated by a second source of light under conditions which induce light absorption by unreacted photoinitiator in the cured film; measuring the absorbance of the cured film; and determining a degree of cure in the cured film from the measured absorbance and predetermined calibration data.

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