Abstract: A door of a microwave oven comprises a metal sheet having a window in a central portion thereof, and a support plate and a transparent glass plate. The metal sheet has a flange formed by press molding, which surrounds the central portion of the metal sheet. The window comprises at least two kinds of hole. A diameter of a first hole is larger than that of a second hole. The first holes are located in the center of the window. The second holes are located each side of an area of the first holes. To manufacture the metal sheet construction, a punch having first pins and second pins, punches simultaneously a row of the first holes and the second holes in a piece of metal sheet. Next, the metal sheet is relatively moved to the punch. The punch punches a next row of the first holes and the second holes. The punching and being moved process are alternatively repeated until the window is made. Finally, the metal sheet is press molded.

Abstract: A microwave oven includes a casing, a cooking chamber defined by a metal wall in the casing having an upper opening, the cooking chamber having an upper opening, an outer lid mounted on the casing for closing and opening the upper opening of the cooking chamber the outer lid having a microwave shield in contact with the upper circumferential edge of the casing to thereby cover the upper opening of the casing, at a closing position of the outer lid, a microwave supply port formed in a bottom portion of the metal wall of the cooking chamber so as to face the interior of the cooking chamber, the microwave supply port being closed by a member formed from a microwave penetrable material a magnetron mounted in the casing and having a member delivering microwaves to the microwave supply port, a lid switch allowing the magnetron to be energized when the outer lid is closed and disallowing the magnetron to be energized when the outer lid is opened, a pot detachably mounted in the cooking chamber via its upper opening,

Abstract: A microwave oven includes a casing defining a heating chamber, a track member disposed in the heating chamber and having an undulate surface circumferentially extended, an electric motor mounted in the casing, a plurality of rolling members each moved along the undulate surface of the track member by the motor, rolling about respective axes thereof in contact with the undulate surface of the track member, and a turntable on which food to be cooked is placed, the turntable having a traveling face and placed on the rolling members so that the traveling face thereof is in contact with the rolling members, whereby the turntable is rotated with a vertical movement.

Abstract: A coffee maker has a heater plate integrally formed with a base plate. The coffee maker also has a lower container in which water is stored and an upper container in which ground coffee is stored. The upper container is mounted on the lower container for a fluid communication therebetween. The lower and upper containers may be moved by a supporting member from a first position where the lower container is heated by the heater plate to a second position where the lower container is allowed to cool when the water in the lower container passes to the upper container. A heater attached to the heater plate is deenergized when the upper and lower containers are moved to the second position.