Optimizing cutoff saw

An improved cutoff saw comprising:

• crosscutting means for cutting a board of plural predetermined locations therealong, and
• conveyance means for feeding the board past said crosscutting means, said conveyance means including means for starting and stopping the board with the predetermined locations aligned for cutting within said crosscutting means, said conveyance means including a first belt conveyor disposed above the board and in frictional engagement with an upper surface thereof along a substantial lengthwise extent thereof upstream and downstream of said crosscutting means, said first belt conveyor being driven in predefined timing relation with said crosscutting means, said conveyance means further including driven infeed means operatively associated with said first belt conveyor and including a second belt conveyor disposed below the board and in frictional engagement with a lower surface thereof along a substantial lengthwise extent thereof upstream of said crosscutting means;
• wherein at least one of said first and second belt conveyors includes a first roller around which a belt of said one belt conveyor travels, said first roller rotating on a shaft urged by leveraging means toward the board to provide gripping engagement with the board between the belts of said first and second belt conveyors;
• and
• wherein said leveraging means includes a pivotable member mounting said first roller and a second roller, said first and said second rollers engaging a first and a second run of one of said belts of said first and second belt conveyors and being responsive to tension in said one belt to pivot said member.