Abstract: A sheet feeding and separating device incorporated in image forming equipment for feeding sheets one by one from a sheet stack while preventing two or more sheets from being fed together as far as possible and, when a plurality of sheets are accidentally fed together, surely separating one of them from the others. A pick-up member is implemented as an endless dielectric belt. An AC power source forms a charge pattern on the belt via an electrode. As a result, the belt retains a sheet by attraction and transports it due to the Maxwell stress generated in the sheet. When a plurality of sheets are fed together, an arresting member which faces the belt separates one of them from the others. Alternatively, a charge pattern may be formed on the surface of the arresting member.

Abstract: A side-valve type internal-combustion engine has a cylinder head formed with a recess or recesses each of which forms a combustion chamber with the associated cylinder and which is large enough to permit the alternate flow of suction or exhaust gas between the suction (inlet) or exhaust valve and the cylinder. In plan, the configuration of the recess is generally L-shaped and covers the both valves and part of the cylinder. One leg of the L-shaped recess provides a straight line passage between the suction or inlet valve and the cylinder, while the exhaust valve and the cylinder are connected in series by the one leg of the recess from the cylinder to the suction valve and then by the other leg from the suction valve to the exhaust valve. The height of the recess is reduced in the region directly above the exhaust valve to a level considerably lower than the rest of the recess so that the upper wall surface of the recess is very close to the exhaust valve when it is in its uppermost position.