Abstract: A method and apparatus for applying or dropping granules onto the asphalt coated surface of a moving sheet in shingle manufacturing is disclosed. The method includes sharing each drop between two or more blend rolls with a subsequent blend roll or rolls applying a partial drop directly on top of partial drops already applied by a first blend roll or rolls. High production speeds can be accommodated since each roll can be operated at slower rotation rates and with slower acceleration and deceleration requirements than would be required if the full granule drop were applied during the same time interval with a single blend roll.

Abstract: A servo rotary shingle diverter includes toothed diverter discs disposed along the path of a stream of shingles separated by spaces. In a first or home rotary position, the diverter discs are disposed entirely beneath the shingle path so that shingles pass the diverter discs unimpeded to a first destination. The diverter discs are rotated at the same rate as the moving shingles such that a tooth of the discs moves along with the shingles and into the path of a selected shingle within the gap head of the selected shingle. The discs are stopped when their teeth align to define a ramp and the next selected shingle engages and rides up the ramp and is diverted thereby to a second destination. The diverter discs are then rotated back to their home position. Every other shingle is thus diverted to the second destination while remaining shingles move on to the first destination.

Abstract: A servo rotary shingle diverter includes toothed diverter discs disposed along the path of a stream of shingles separated by spaces. In a first or home rotary position, the diverter discs are disposed entirely beneath the shingle path so that shingles pass the diverter discs unimpeded to a first destination. The diverter discs are rotated at the same rate as the moving shingles such that a tooth of the discs moves along with the shingles and into the path of a selected shingle within the gap head of the selected shingle. The discs are stopped when their teeth align to define a ramp and the next selected shingle engages and rides up the ramp and is diverted thereby to a second destination. The diverter discs are then rotated back to their home position. Every other shingle is thus diverted to the second destination while remaining shingles move on to the first destination.