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AssigneeDainippon Screen Mfg. Co., Ltd.
InventorsKunio Ikefuji, Tsuyoshi Okuda
Estimating the term…
A printing apparatus records a predetermined test pattern on printing paper, and reads the test pattern by means of a scanner. The scanner reads the test pattern at a resolution lower than the resolution of a recording head. This allows the automatic and fast reading of the test pattern. Additionally, the printing apparatus performs an interpolation process on read data, and judges whether there is an abnormality in nozzles or not, based on the read data subjected to the interpolation process. This reproduces the positions of and spacing between lines recorded on the printing paper with high accuracy to achieve the exact judgment as to whether there is an abnormality in the nozzles or not. Therefore, an inspection with a high degree of reliability is accomplished.
An inkjet printing apparatus comprising:
A method of inspecting a plurality of nozzles for abnormalities in an inkjet printing apparatus including a recording head, said recording head including said plurality of nozzles, said plurality of nozzles ejecting ink onto printing paper, said recording head recording an image on said printing paper, said method comprising the steps of:
An article of manufacture comprising a program stored on a computer readable storage medium which, when executed by a computer included in a controller included in an inkjet printing apparatus, said inkjet printing apparatus including a recording head having a plurality of nozzles for ejecting ink onto printing paper, a scanner for reading an image recorded on the printing paper, and the controller for controlling said recording head and said scanner, causes said computer to perform the functions of:
Dependencies are inferred from the claim text.