Abstract: A terminal provided with a contact surface to be brought into contact with a mating terminal. In order to improve the strength of the contact surface, the terminal is constructed so that an elastic contact leaf is provided inside a square cylindrical contact portion into which a mating terminal is inserted and that the contact surface expanding in the direction of the elastic contact leaf is formed in a wall portion opposite to the elastic contact leaf in the contact portion. The contact surface is formed into a plane shape where the length of the central portion is set to be greater than the length of both sides in the direction of inserting the mating terminal.

Abstract: Apparatus for producing and reproducing embedded patterns in which a character or the like including a pattern which is not observable macroscopically can be differentiated from the other formats microscopically. An input unit reads a normal original image pattern utilizing a raster scanning system. In the apparatus for producing the format, a processing unit includes a gate which receives a signal from the input means and passes or blocks the signal in accordance with the desired embedded pattern. An output unit records the image using the raster scanning system. In the apparatus for reproducing the format, a processing unit includes a gate which blocks or passes an input signal depending on whether or not it contains the embedded pattern.