referring to the drawings fig1 illustrates a single length of monofilament line 10 suspended from a fixed in position anchor hook 20 . the monofilament line 10 has respective opposite ends 11 and 12 and mid - way therebetween the length of monofilament line is looped one and one half times ( i . e . 540 °), as indicated at 13 , around the anchor hook 20 . the monofilament line , preferably nylon , thus as illustrated has respective first and second strand parts 14 and 15 each of which is approximately half the length of the single stand 10 . a twister mechanism 30 , to be described in more detail hereinafter , is diagrammatically illustrated in fig2 and 4 with certain operative details thereof shown in fig5 and 6 . the twister mechanism 30 is shown in its simplest form comprising a drive gear 31 meshing with a pair of planetary gears designated respectively 32 and 33 . these gears are located within a suitable casing or housing 34 and by any suitable bearing means are journalled for rotation on the housing . the planetary gears 32 and 33 have respective centrally disposed recesses or through holes 35 and 36 into which the ends 11 and 12 can be inserted . the strand ends 11 and 12 are anchored to the planetary gears by suitable wedging mechanisms , for example a tapered pin such as a toothpick , designated respectively 41 and 42 . gear 31 of the twister mechanism has a drive shaft 37 secured thereto and projecting therefrom beyond the casing and which can be readily inserted into the chuck 40 of an electric power drill . referring now back to fig2 with the ends 11 and 12 anchored to the respective planetary gears ( described briefly above with reference to fig6 ) gear 31 is driven via shaft 37 . the planetary gears 32 and 33 rotate ( both in the same direction as best seen with regard to the gear rotation arrows 55 illustrated in fig5 providing a twist to the respective strand parts 14 and 15 . in the same direction as seen from strand rotation arrows 56 in fig2 ) by way of example a twist of about 200 revolutions per meter length of nylon strand has been found to be suitable . the amount of twist can vary substantially depending upon the characteristics desired for the leader . less twist provides a softer leader and one with less mass while more twist results in a stiffer leader and one with greater mass . by selecting the amount of twist and / or the diameter of the monofilament line , which can vary from 0 . 1 mm to 0 . 5 mm , one can make a leader with desired characteristics . each leader can thus also be adapted to the fly line which can vary from a # 2 to a # 14 . the weight of unit 30 ( or weights attached thereto ) is sufficient to keep the twisted strands 14 and 15 straight . typically the unit will be from 4 to 6 ounces in weight . with strand parts 14 and 15 each twisted the desired amount and with a hook 50 inserted into the loop lower portion 13 a ( fig2 ), the hook is pulled down and attached to the twister mechanism . by way of example the hook 50 may have a threaded stem 51 which threads into a threaded recess 38 in the gear 31 . this is diagrammatically illustrated in fig3 and with reference to the same the strand part 14 has now become strand portions 14 a and 14 b and strand part 15 has become strand portions 15 a and 15 b . each strand portion is approximately one quarter the length of the initial single strand and each strand portion has an equal amount of twist . it will be apparent there are in this illustrated embodiment four strand portions to be twisted together . with the arrangement as illustrated in fig3 the free hanging leader twister mechanism 30 ( suspended from the hook 20 by the four twisted strand portions ) is allowed to rotate freely and it is permitted to do so until it comes to rest . the direction of rotation as seen by rotation arrow 57 in fig4 is opposite to that of the initial twist in the strand parts 14 and 15 . created by the foregoing is a multi strand leader with a loop 60 at one end provided by two strand portions 14 a and 15 a merging as continuations thereof into respective strand portions 14 b and 15 b . at the other end there is a loop 70 where strand portion 14 b merges into strand portion 15 b . the other two strands terminate adjacent loop 70 in the free ends 11 and 12 . the strand portions which have been twisted together form a twisted leader of a desired preselected length from a single length of monofilament line with such single length providing a loop at the respective opposite ends of the leader . the leader may be in the range of from 1 ′ to 20 ′ in length . the thus formed leader is illustrated in fig7 and in reference to the same there is the loop 60 at one end and the loop 70 at the other end . the strand ends 11 and 12 are secured to the leader by for example knotting , e . g . a needle knot , or otherwise suitably anchored to prevent unravelling . before being secured these ends 11 and 12 are preferably unravelled back to different lengths to provide a tapered leader which comprises four strands , then three strands , then two strands all formed from the single length of monofilament line . the finished product is diagrammatically illustrated in fig8 . the tapered leader comprises a first portion from a to b of four strands , a second portion from b to c of three strands and a third portion from c to d of two strands . integral with the leader are loops 60 and 70 at respective opposite ends thereof . the term integral herein , with reference to the loops , is meant to exclude constructions of forming loops by knotting , tying or interweaving . the loop is the result of the path followed by the single length of monofilament line from one end 11 to its other opposite end 12 , i . e . a portion in the transition from one strand portion to the next . the leader of the present invention can readily be made by a fly fisherman to suit his needs . the number of turns per meter length of line can be varied so that the leader may be soft or stiff or most anything therebetween . nylon monofilament line can be purchased as a limp line or a stiff line or most anything therebetween . the nylon as mentioned can also be purchased in diameters ranging from 0 . 1 mm to 0 . 5 mm . the maker of the leader can experiment using these different variables to construct a leader having characteristics as may be desired . the twister mechanism is a simple device that might for example be 2 ″ in diameter , have a thickness of ½ ″ to ¾ ″ and weigh about 4 ounces to 6 ounces . the casing 34 comprises a pair of plates . 34 a and 34 b held in spaced relation by a spacer 34 c . the spacer 34 c may be a continuous wall , i . e . an annular sleeve or a number of posts and the unit is held together by a number of threaded fasteners 34 d or other suitable means . the gears have hubs that project into recesses or pass through apertures in the plates . the plates and gears may be metal and nylon bushings may provide suitable journals for the gear hubs . alternatively the gear hubs themselves may be made of a nylon material or the gear hubs may be metal and the plates made of nylon . the leader described and illustrated in the foregoing comprises four strands twisted together with those four strands being provided by a single continuous length of a monofilament line fold upon itself . there may be additional strands if desired and additional planetary gears may be added to the twister mechanism permitting twisting those additional strand lengths . thus one can make a leader with more than four strands , e . g . 6 , 8 or even more . 1 . the leader is better balanced in mass and flexibility to the fly line than any leader on the market today ; 2 . it has a loop - to - loop system without the use of any extra components like braided end loops ; 3 . the action of the leader can be chosen according to application by using limp or stiff nylon material or a combination of both ; 4 . the leader can be produced by the individual fisherman to his own liking ; 6 . the leader has extraordinary floating quality because of the locked air in the twisted surface of the leader ; and 7 . the leader has extraordinary sinking quality when the surface of the leader material before twisting and the twisted surface of the leader is coated with sinking material .
a fly line leader made from a single length of monofilament line that is folded upon itself to provide at least four strand portions that are twisted together . the leader has a loop at each of opposite ends thereof provided by the single length of monofilament line with the result of no enlargement at the transition from the main portion of the leader to the loop . the monofilament line preferably is nylon with a cross - sectional diameter in the range of 0 . 1 mm to 0 . 5 mm . a simple twister mechanism is described whereby the fisherman can make his own leader matched to his own preferences by selection of line stiffness , line diameter , and degree of twisting .