INTERMEDIATE MEMBER SURFACE COMPOSITION FOR SENSING BY AN IMAGE SENSOR

摘要

There is described a method of operating an aqueous ink jet printing apparatus. The printing apparatus includes a member defining a reflective imaging surface wherein the imaging surface is substantially white or grey in the visible spectrum and wherein the imaging surface has an optical density variation of less than about 0.3. The method includes a photosensor array disposed to receive light reflected from the reflective imaging surface. The method includes ejecting aqueous ink onto the reflective imaging surface using a printhead and forming aqueous ink drops on the surface of the rotating member. The method includes generating image data from the reflecting imaging surface using the photosensor array. The method includes identifying a parameter from the generated image data that is not within specification

主权项

1. A method of operating an aqueous ink jet printing apparatus, the printing apparatus comprising a member defining a reflective imaging surface wherein the imaging surface is substantially white or grey in the visible spectrum and wherein the imaging surface has an optical density variation of less than about 0.3, and a photosensor array disposed to receive light reflected from the reflective imaging surface, the method comprising:
ejecting aqueous ink onto the reflective imaging surface using a printhead and forming aqueous ink drops on the surface; transferring the aqueous ink drops to a media substrate; generating image data from the reflecting imaging surface prior to the transfer of the aqueous ink drops to the media substrate using the photosensor array; and identifying a parameter from the generated image data on the reflecting imaging surface that is not within specification.