| 摘要 |
<p>In an apparatus (10, 110, 210, 310) for printing on a continuously moving sheet of work material (15, 115, 215, 315), a frame (12, 112) is provided and defines a work supporting surface (14, 114, 214) over which a sheet of work material is advanced in a first coordinate direction longitudinally of itself. An elongated support (16, 116, 216, 316) is mounted to the frame (12, 112) and extends transversely across the work supporting surface (14, 114, 214). A print head (28, 128, 228, 328) is mounted to the elongated support (16, 116, 216, 316) and is movable across the support, as well as between a forward and rearward position. During operation, as the work material (15, 115, 215, 315) is continuously advanced through the apparatus (10, 110, 210, 310), the print head (28, 128, 228, 328) traverses the support (16, 116, 216, 316) and simultaneously moves between the forward and rearward positions, such that the print head has a component of speed in the first coordinate direction approximately equal to the rate at which the work material is advanced. This causes the print head (28, 128, 228, 328) to print successive lineal portions of a graphic oriented approximately perpendicular to the first coordinate direction while the work material (15, 115, 215, 315) is continuously advanced. <IMAGE></p> |
