Method for printing on continuously moving sheet

Abstract

The invention discloses a method for printing on a continuously moving sheet. The method includes the steps of: S100, providing a printing apparatus having a frame defining a work support surface; providing a device for continuously moving a sheet at a known speed in the longitudinal direction of first coordinates; providing a lathy support part above the work support surface, wherein the frame isconnected to at least one printing head and extends horizontally; the printing heads are movably connected to the lathy support part and define a plurality of discrete printing elements; providing amatrix array with a defined array height; and providing a device used for moving the printing heads between a first end and a second end to penetrate through the lathy support device. The method disclosed by the invention can adopt a plurality of staggered printing heads; and each printing head is slidably connected to the lathy support part and keeps a predetermined distance from the next continuous printing head. During operation, when a printing head passes across the corresponding one of a first section and a second section, each printing head is used for printing a linear part of an imagein a direction approximately perpendicular to the first coordinates so as to realize multi-line printing during each passing.

Description

technical field [0001] The invention relates to the technical field of sheet material printing, in particular to a method for printing on a continuously moving sheet material. Background technique [0002] In known printers, a single printhead is typically mounted on a frame for lateral movement across a sheet of work sheet; in many cases, the printhead consists of a print cartridge with an ink reservoir and a plurality of discrete ink jets , these ink jets are arranged in a matrix-like pattern adjacent to the medium to be printed; this matrix-like ink jet pattern is called an array by those skilled in the relevant art; [0003] Typically, graphic lines are printed onto a workpiece sheet by causing the printhead to traverse the workpiece sheet while the working sheet is stationary; when the printhead moves, the inkjet ejects ink of the appropriate color onto the workpiece according to commands from the controller. on the workpiece sheet; then, the working sheet is progressi...

AI Technical Summary

Problems solved by technology

[0004] The problem associated with printing in the manner described above is that the incremental indexing of the working sheets makes the printing process very time consuming and therefore expensive; in addition, in large printing applications it is often necessary to accelerate and decelerate large rolls of sheet whose inertia can make accurate graduation difficult;

[0005] Furthermore, discrete movements of the work sheet may cause slight misalignments therein, which in turn create inaccuracies in the printed graphics; furthermore, after the print line, the work sheet must advance by an amount equal to the jet defined by the print cartridge. The height of the inkjet array; any deviation will result in overlap or gaps between successive print lines, depending on whether the workpiece sheet progresses too far or too little;

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