Abstract: The battery charger charges a battery pack housing rechargeable batteries by attaching the battery pack 30 in a detachable manner on the battery charger. The battery charger is provided with a case 1 having an attachment section 2 where a battery pack 30 is attached in a detachable manner, and a plurality of connecting terminals 3 disposed in an exposed manner in the attachment section 2 to connect with external terminals 33 on the battery pack 30. The plurality of connecting terminals 3 is disposed in a plurality of rows. The connecting terminals 3 are provided with positive and negative charging terminals 4 disposed on both sides, and non-charging terminals 5 disposed between the charging terminals 4. Further, the non-charging terminals 5 are disposed in a manner projecting outward further than the charging terminals 4 on both sides.

Abstract: An image forming apparatus includes a microcomputer which controls components for executing an image forming operation, and sends a signal to a supervising portion when no abnormality occurs in itself. The supervising portion includes a watch-dog timer, and sends a reset signal to the microcomputer when the signal from the microcomputer is not continuously inputted for a predetermined time period or more. Accordingly, the microcomputer becomes in a reset state, and the image forming operation is stopped. A flag is not set until a predetermined time period elapses from a time that the reset signal is inputted, and therefore, the image forming operation is inhibited for the predetermined time period.

Abstract: In a copying machine, an original which has been once exposed to be scanned is inverted and transmitted again to an original table glass, and a sheet having one face onto which an image has been fixed is inverted and then transmitted through a transmitting path to an image forming section, whereby the top and back faces of the original are copied to the top and back faces of the sheet, respectively.