(57) A method of manufacturing doors for domestic ovens combining microwave and electrical
resistance heating. An inner backing door (5) comprising an outer side wall (6) having
a plurality of transversal slots (7), a stiffening frame (11), and an outer backing
door (16) comprising a supporting side wall (26) are pressed from sheet steel. A flat
metal sheet is punched and pressed to form a perforated microwave shield (14). The
stiffening frame (11) is welded to the inner backing door(5) to form a sub-assembly.
The sub-assembly (5,11) and the outer backing door (16) are selectively enamelled
so that each comprises a zone (12, 17) free from enamel, and are heated to a temperature
exceeding 700°C. A gasket (13), a first glass pane (12A) and the shield (14) are placed
on the sub-assembly (5, 11) to which the outer door (16) is fastened so that the shield
(14) is clamped between the non-enamelled zones (12,17). A second glass pane (28)
is placed on the outer backing door (16) and fastened to the supporting side wall
(26).
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