determines the position of the beater arm 52 the second beater drive 36 39 is located on the opposite side of the fabric 10 and is of identical construction so the same reference numericals with primes have been used to identify like parts it will be obvious to those skilled in the art that the fixed path 44 followed by movable fulcrum 40 could be defined in other ways and that its instantaneous position along the path could be established by other means the positioning of beater arm 52 could likewise be programmed by other means in general the reed 39 is caused to move in a somewhat ovate path at the beginning of the beat up motion the reed is in a raised position outside the shed formed by warp sheets 58 59 the fingers 28 30 are moved between the warp strands 11 14 in sheet 58 and between the warp strands 15 18 in sheet 59 primarily as a result of movement of fulcrum 40 by beater arm 46 in response to changes in the profile of cam 51 as the toggle formed by beater arm 52 and toggle link 53 is straightened in response to changes in the profile of cam 56 the reed 39 is brought down against.