Abstract: A mechanism for stacking and weighing sheets fed from a semi-continuous sheet cutter. The mechanism includes a hydraulic cylinder operatively connected to a stacking table so that as sheets are deposited onto the stacking table, the table is lowered by indexing the hydraulic cylinder. This continues until a full stack of sheets, having a predetermined number of sheets determined by weight, by height of the stack or by sheet count has been stacked on the table. The hydraulic cylinder comprises a hydraulic fluid reservoir, an electrically driven hydraulic pump, a four-way, three position hydraulic spool valve, a hydraulic cylinder and back pressure safety valve. A load cell connected between the hydraulic cylinder and the rest of the mechanism is connected to a scale device which will weigh the stack of sheets.

Abstract: A system for weighing spools of paper includes a pair of hydraulic cylinders with pistons which may be extended to support the ends of the reel upon which the paper spool is wound. One fluid inlet of each of the cylinders is connected to a fluid reserve tank. The other fluid inlet communicates with an air-hydraulic booster through a hydraulic fluid line. A four-way, two-position valve includes an inlet from a high pressure air supply, an exhaust outlet, and air lines connected to the fluid reserve tanks and to the air-hydraulic booster. Load cells positioned on each of the pistons are connected to a scale device which provides a visual weight display. When a spool of paper is to be weighed, the valve directs high pressure air to the air-hydraulic booster to extend the pistons. The force exerted by the spool on the load cells is equal to the weight of the spool.