Protective barriers for window of microwave oven door

Claim 2

A door construction for a microwave cooking oven comprising a narrow door frame with a large window opening, an inner door liner of perforated configuration covering the window opening and serving as a microwave radiation barrier, and a transparent interference barrier carried by the outer side of the door and serving to prevent elongated foreign objects from being inserted from the outside of the door through the perforated microwave barrier, and air passages in the door frame to permit a current of air to sweep the inner surface of the transparent barrier and prevent vapor condensation thereon, said air passages also serving as an air exhaust means from the oven, and means whereby said transparent barrier is slidably supported in the door frame for ease of removal.

Claim 3

An oven door construction as recited in claim 1 wherein the outer transparent barrier is larger than the inner perforated barrier and extends outwardly beyond the extremities of the perforated barrier.

Claim 4

An oven door construction as recited in claim 1 wherein the air passages in the door frame are formed above and below the transparent barrier.

Claim 5

An oven door construction as recited in claim 1 wherein the air passages in the door frame are formed in the opposite sides of the door frame. 5 An oven door construction as recited in claim 1 wherein said means comprises a skeleton bar and a removable crown, said crown includes an elongated door handle extending outwardly therefrom, removable crown being attached to the upper edge of the transparent barrier, and fastening means for joining the removable crown to the skeleton bar, whereby the transparent barrier may be removed from the door by detaching the crown from the skeleton bar and using the door handle to lift the transparent barrier away from the door.

Claim 6

An oven door construction for a microwave cooking oven comprising a door frame with a window opening, an inner door liner of perforated configuration covering the window opening and serving as a microwave radiation barrier, the front portion of the door frame being beveled outwardly, and an enlarged transparent interference barrier carried by the door and serving as the outer door panel to prevent elongated foreign objects from being inserted from the outside of the door through the perforated microwave barrier, and air passages in the door frame to permit the oven exhaust to pass through the perforated barrier and out the air passages, one portion of the door frame having a skeleton bar and a removable crown, and means whereby the transparent barrier is slidably supported in the door frame and confined in place by the removable crown, and fastening means for joining the crown to the skeleton bar.

Claim 7

An oven door construction for a microwave cooking oven comprising a door frame with a window opening, an inner door liner of perforated configuration covering the window opening and serving as a microwave radiation barrier, the front portion of the door frame being beveled outwardly, and an enlarged transparent interference barrier carried by the door and serving as the outer door panel to prevent elongated foreign objects from being inserted from the outside of the door through the perforated microwave barrier, and air passages in the door frame to permit the oven exhaust to pass through the perforated barrier and out the air passages, one portion of the door frame having a skeleton bar and a removable crown, and means whereby the transparent barrier is slidably supported in the door frame and confined in place by the removable crown, and fastening means for joining the crown to the skeleton bar.

Claim 8

An oven door construction as recited in claim 6 wherein the removable crown is at the top portion of the door frame, and the crown is attached to the transparent barrier such that when the crown is removed the transparent barrier is separated from the door.

Claim 9

An oven door construction as recited in claim 6 wherein the said air passages are located above and below the transparent barrier.