same temperature as the water in tank 34 to cool the formed line prior to spooling finally a conventional spooling assembly 70 is deployed in the assembly line downstream of quench tank 66 wherein each of the individual double strand lines 10 formed by the aforesaid process are individually wrapped about separate spools 72 for storage and shipment in the example set forth above five separate spools would be wound with line 10 by assembly 70 and a total of 199 5 pounds of line 10 would be produced per hour based on 402 feet of line per pound in a second example four pair of double strand lines 10 of the same nylon copolymer have been formed using an eight hole die 28 wherein the individual strands 12 and 14 are each 0 095 inch in diameter the diameters of the die holes are each 0 260 inch the melt temperature water temperatures and oven temperatures are all the same as in the prior example because the line being formed is comprised of strands of greater diameter than the line in the prior example the air gap is six inches the initial strand contact points 33 are again 2 to 4 inches below the surface of the water the rotational velocity of the drive rollers in the first roll stand 44 is 37 9 feet per minute the velocity of the drive rollers in the second roll stand 46 is 117 49 fpm and in the third roll stand is 115 14 fpm in this example 200 97 pounds of line would be produced per hour at 275 feet per pound various changes and modifications may be made in carrying out the.