| 摘要 |
Process and apparatus are disclosed for the printing of textile bands, such as sponge-cloths with contiguous ends connected to each other by transversal selvedges, on a flat-screen printing machine with an endless carrying belt and printing units, said process consisting: in arranging between two consecutive sponge-cloths a reference sign to be read by at least one sensor; in adjusting the advancing of the carrying belt to a repeat equal to the nominal length of the sponge-cloths, and by converting said advance to a number of electrical impulses to be sent to a programmer-computer; in arranging the printing units at a distance equal to two times said repeat, centering the sponge-cloth manually by conventional means; in positioning said sensor at a distance from the first printing unit, equal to at least one repeat; and in shifting said printing units proportionally to variations in lengths of each sponge-cloth, with respect to the nominal value, by interlocking said displacements with the programmer-computer, actuated by said sensor which read the actual lengths of each sponge-cloth, said displacements of the various printing units and their actuation to print being automatically controlled and actuated by the programmer-computer, which follows the advance of the sponge-cloth step-by-step so as to obtain, in the case of sponge-cloths longer or shorter than the nominal ones, a corresponding displacement of the printing unit along the machine, and the printing of a sponge-cloth in a centered position. |
