Apparatus for spreading a granular material comprises a conveyor designed to move the material from a hopper to a distributor. The conveyor comprises two endless cables mounted in parallel and each passing around two end pulleys, parallel transverse bars each attached to the cables at regular intervals and designed to move the material on a transport surface, and a driving device designed to move the cables in synchronism. The granular materials may be for the winter treatment of roads.

An improved slope plate assembly is provided for a truck box for use in transporting particulate material. The slope plate assembly includes a plurality of slope plate sections pivotally connected to the opposite side walls of the truck box so as to be movable between a raised inoperative position and a lowered operative position. In the lowered position, particulate material flows by gravity along the slope plate sections for discharge into an auger assembly residing below the floor of the truck box. In the raised position, bulk material or other cargo can be loaded into the truck box. A multiple-piece dividing wall can also be installed in the truck box to divide the box into multiple compartments, with the slope plates being in the lowered position in the forward compartment and in the raised position in the rearward compartment, such that particulate material may be transported in the forward compartment and bulk material transported in the rearward compartment.

The invention comprises a mobile trailer having a frame with a set of wheels on the frame for hauling the trailer and a pair of storage bins on the frame in side by side spaced relation with one bin adapted to a receive peat with a mixing blade to mix the peat and the other bin adapted to receive sand. The bins have openings along their bottoms and connecting openings along their vertical front walls with vertically adjustable plates to vary the sizes of the vertical openings. Horizontal conveyors are mounted beneath the bottom openings to the bins. Collecting and mixing blades are in the front of the trailer and a rotating spreader mounted to the rear upper portion of the trailer. An inclined conveyor is mounted with its lower end beneath the mixing blade and its upper end above the spreader. The trailer has power take off means with a drive connection to a tractor to be connected to power the collecting and mixing blades, the conveyors, and spreader, whereby the bin openings may be opened to selected sizes to allow the materials to gravitate from the bins onto the horizontal conveyors, and the horizontal conveyors may convey the materials to the collecting and mixing blades for collecting and mixing the materials and the inclined conveyor may convey the mixed materials of sand and peat up to the spreader to gravitate onto the spreader to spread the mixed materials on the ground.

Apparatus for preventing segregation of aggregate includes a plurality of vertically disposed chutes at the discharge end of a conveyor, each chute being arranged to intercept a portion of aggregate leaving the conveyor, and direct it downwardly onto a common pile.

Paving materials having excellent durability supplied to a front spreading screw 5 is prevented from dropping onto the center band of a road by a bottom plate 30, and by the rotation of the front spreading screw 5 is spread onto the two bands of the road where the left and right tires of cars make contact. In contrast, an ordinary paving materials supplied to rear spreading screw 7 is prevented from dropping onto the bands of the road with which the left and right tires of cars make contact by means of the bottom plates 32, 33 and is spread onto the center band and the outside bands of the road by the rotation of the rear spreading screw 7. Two types of paving materials spread and formed into alternating bands in this way are laid and paved at the same time by the screed 9, and as a result, a pavement with high durability can be constructed at low cost.