| 摘要 |
<p>THE PRESENT INVENTION RELATES TO A METHOD AND TOOLING SUITABLE FOR HANDLING CLOSURE BLANKS (5) HAVING AN EXTERNAL RADIUS (6) AT THEIR CUT EDGE AT PRODUCTION SPEEDS OF ABOUT 1200 CLOSURES PER MINUTE. THE EXTERNAL RADIUS (6) LIMITS FORMATION OF ?ANGEL HAIR? (A COMMON PROBLEM IN METAL CLOSURE PRODUCTION). HOWEVER, REVERSING THE EXTERNAL RADIUS CAUSES A PROBLEM, WHEN PRODUCING METAL CLOSURES HAVING A CONVENTIONAL INWARD CURL AT THEIR PERIPHERAL EDGE. ACCORDINGLY, THE INVENTION PROPOSES A MODIFIED CURLING RAIL (40) HAVING A FIRST PORTION (41) TO UNCURL ME EXTERNAL CURL (6) ON THE CLOSURE BLANK (5) AND A SECOND PORTION (45) TO URGE THE STRAIGHTENED SIDE WALL OF THE CLOSURE BLANK (5) TOWARDS AN INWARD CURL.</p> |
