Method, system and apparatus for scraping a roll surface in a molten metal coating process

A method for scraping a roll surface of a sink roll rotating in a molten metal coating process comprising:

• a) traversing a support assembly to one side of a sink roll, the support assembly comprising a first arm having a first pair of scraper blades and a second arm having a second pair of scraper blades, wherein the first arm and second arm are independently operable to extend and retract;
• b) lifting the first arm and the second arm to a fully retracted position, thereby disengaging the first and second pairs of scraper blades from contact with the roll surface;
• c) lowering the first arm and the first pair of scraper blades from above the approximate mid-point of the sink roll, into contact with the sink roll surface;
• d) extending the first arm to engage the first pair of scraper blades in contact with the sink roll;
• e) moving the first arm at a predetermined speed from the sink roll approximate mid point to a fully traversed position, while the second arm moves from a point above a first end of the sink roll to a point above the sink roll approximate mid point;
• f) stopping the traversing means upon reaching the fully traversed out position;
• and
• g) lifting the first pair of scraper blades from the roll surface and extending the second arm to engage the second pair of scraper blades in contact with the sink roll;
• and
• h) moving the second arm at a predetermined speed from the sink roll approximate mid point to a fully traversed position, while the first arm moves from a point above a second end of the sink roll to a point above the sink roll approximate mid point.