| 摘要 |
<p>A printing apparatus for printing repeat length portions of a continuous moving web with a predetermined print pattern comprising repeat length measuring assembly (90, 98, 96) for measuring the current length of the repeat length portions of the web and generating a repeat length signal indicative thereof; rotary print cylinder (30) having a peripheral printing surface for rotatingly engaging a first surface portion of the web and repeatedly printing the print pattern thereon; print cylinder drive for rotating the rotary print cylinder at a predetermined variable speed dependent on current web speed, the measured current repeat length and the circumference of the peripheral printing surface of the print cylinder is disclosed. A phasing assembly (90, 120, 42) for initially selecting a phasing relationship between web and print cylinder and automatically maintaining the selected phasing relationship is also disclosed.</p> |
