Abstract: An apparatus and method for distributing articles is arranged to deliver articles to selected stacking positions in two or more storage units. An article is dispensed to a first article transport and distribution section in a main storage unit, and then either delivered to a stacking position in the main unit or transported through a connecting window onto a second transport and distribution section in a satellite storage unit for delivery to a stacking position in that unit. The procedure is repeated to distribute subsequent bags of ice to selected stacking positions in each unit. Additional satellite storage units may be provided and included in the delivery sequence for distributing bags of ice throughout the units. The storage units may be refrigerated, merchandizing units for bagged ice, with the main storage unit associated with an ice bagged ice supply unit which dispenses bags of ice into the unit.

Abstract: A thru-beam sensor is positioned such that the beam passes through the crease line of the envelope when the envelope is parked in the insertion area. As the envelope enters the insertion area, the through beam sensor is set to current level A. The sensor is used to accurately position the envelope based on the passing of the lead edge. Once the envelope is in position, the current in the thru-beam emitter pair is raised until the envelope is no longer obstructing the line of sight of the sensor. From this state, the insert or plurality of inserts that are entering the accumulator can be detected, as the presence of the inserts will inhibit light transmission between the emitter and receiver. Using the sensor system proposed here, the inserts trailing edge can be detected at the crease line of the envelope.

Abstract: A combustion-powered nail gun including an arrangement for promoting a piston returning motion to its upper dead center. A combustion chamber frame is movable toward and away from a head cover at which a spark plug is provided. When the combustion chamber frame is in close contact with the head cover, a combustion chamber is provided among the combustion chamber frame, the head cover, a part of a cylinder and a piston. After the piston reaches the lower dead center as a result of combustion, a thermal vacuum is provided in the combustion chamber for allowing the piston to move toward the upper dead center. The combustion chamber frame has a through-hole, and a valve is provided for normally closing the through-hole. A solenoid is provided to selectively open the valve for leaking an increased pressure in the combustion chamber through the through-hole during the return stroke of the piston.