MAGNETIC METHOD AND APPARATUS FOR DEPOSITING GRANULES ONTO AN ASPHALT-COATED SHEET

摘要

A method of applying blend drop 60 granules to an asphalt coated sheet 20 includes moving an asphalt coated sheet in a machine direction 13, and depositing blend drops of granules on a blend drop conveyor 30 that is positioned above the asphalt coated sheet. The blend drop conveyor has an upper flight 34 moving in a direction opposite the machine direction and a lower flight 36 moving in the machine direction. The blend drops are moved from the upper flight to the lower flight of the blend drop conveyor while retaining the blend drops in contact with the blend drop conveyor by magnetic force. Finally. The blend drops are released from the blend drop conveyor for contact with the asphalt coated sheet.