Patent ID: 7726155

Claim:
A cooling tube mounted beneath a fiberizing bushing having a plurality of tips thereon through which molten material flows through for fiberizing the molten material, the cooling tube comprising an elongated hollow tube with one or more solid fins extending from a surface of the cooling tube and running lengthwise along a major portion of a length of the cooling tube for cooling one or more of the tips on the fiberizing bushing, molten material flowing out of the tips, and fibers formed from the molten material, the cooling tube with the one or more solid fins comprised of a metal or a metal alloy, a top surface of each of the one or more solid fins closest to the tips being interrupted with spaced apart gaps, notches and/or slots in at least a top portion of each of the one or more solid fins, each of the one or more solid fins having a top surface closest to the plurality of tips having a height in the range of about 2.5 mm to about 7 mm from the surface of the elongated hollow tube to the top surface of each of the one or more solid fins, the gaps, notches and/or slots having a width at the top of each of the one or more solid fins in the range of about 0.05 mm to about 1.01 mm per each 25.4 mm of uninterrupted solid fin length from either a closest end of that solid fin or from an edge of a closest gap, notch or slot, the gaps, notches or slots extending at least 25 percent down the height from the top surface of each of the solid fins.