loaded tensioner brake 106 there is one guide bar 104 for each layer of fibrous material 62 the brake 106 is attached to the underside of the top horizontal beam 50 directly above the guide bars 104 the brake 106 comprises a metal block 107 and two vertically oriented flat metal plates 108 which are pressed against the block 107 by adjustable springs 109 each layer of fibrous material 62 is pulled through a gap between the block 107 and one of the plates 108 with the amount of tension on the lining material adjusted by varying the compression of the spring 109 it is important to maintain the lining material under tension to prevent wrinkles from being formed as the material is wound about the mandrel the layers of fibrous material 62 are vertically oriented as they are pulled through the tensioner brake 106 after passing through the tensioner brake each layer makes a 90 u00b0 turn over laterally spaced apart parallel cylindrical turning bars 112 one for each layer of fibrous material to become horizontally oriented the turning bars 112 project from and are secured to the upper horizontal beam 50 directly above the brake 106 as shown in fig2 and 4 the fibrous material is now following a path which is generally parallel to the ground and the longitudinal axis of the mandrel 10 the fibrous material preferably is wound on the mandrel in an helix it is for this reason that the support plate 72 pivots a.