Appeal No. 98-1207 Page 12
Application No. 08/420,648
materials which fall through screen 18 pass onto finer screen
20. Here, again, the coarser materials 34 are retained above
screen 20 while the finer materials 32 pass through to
collector plate 22. The relatively coarser materials 34 on
the top of screen 20 are urged to flow downward toward the
front of the machine where they are collected on conveyor belt
30, which carries them to the right of the machine and into
trench 44. The finer materials which pass through screen 20
are
collected by collector plate 22 and are urged to flow
downward, toward the front of the machine, to conveyor belt
26. Conveyor belt 26 conveys the finest materials to the
right of the machine where they are transferred by means of
gravity to conveyor belt 28. Conveyor 28 carries the finest
material, above conveyor 30, to the front of the machine for
padding the trench 44. In operation, then, conveyor 28 places
the finest materials into trench 44, first. Conveyor 30
follows with a coarser material and the coarsest materials are
deposited into the trench, last, or onto the ground, according
to the way the machine is set up.
Page: Previous 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 Next
Last modified: November 3, 2007