Windowed oven door

Claim 2

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall jointly defining a through opening and a cooling air passage extending vertically through said door; means at the bottom of said passage forming air inlet means in said door; means at the top of said passage forming air outlet means in said door; a viewing window across the rear of said through opening in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air and light permeable protective screen means in said door across the front of said through opening spaced outwardly of the exterior of said window for barring contact of said window from the exterior of the oven during operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings therethrough in communication with said air passage for entry of cooling air into said air passage at a plurality of different positions and including a position in the upper portion of said through opening and defining the outermost element in front of said windows, said door defining an opening means and further including a frame means for removably mounting said screen in said opening means, said frame and screen being retained in said opening means by a frictional engagement of the frame with the opening means, said opening means comprising a surface portion of said door having a frame engaging surface that snugly engages the outer surface of said frame when the frame is in position in the door.

Claim 3

The oven door of claim 1 wherein said screen comprises a woven metal cloth.

Claim 4

The oven door of claim 1 wherein said screen comprises a perforate metal sheet.

Claim 5

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall jointly defining a through opening and a cooling air passage extending vertically through said door; means at the bottom of said passage forming air inlet means in said door; means at the top of said passage forming air outlet means in said door; a viewing window across the rear of said through opening in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air and light permeable protective screen means in said door across the front of said through opening spaced outwardly of the exterior of said window for barring contact of said window from the exterior of the oven during operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings therethrough in communication with said air passage for entry of cooling air into said air passage at a plurality of different positions and including a position in the upper portion of said through opening and defining the outermost element in front of said window, said screen having air permeable openings over a substantial portion of the total screen surface thereby permitting viewing of the window through the screen and providing an abundance of air openings for passage of cooling air to the interior of the door in the viciniTy of said window, the air outlet means being provided at a higher elevation than said screen for permitting escape of heated air that is drawn into the door through the screen and that has become heated by contact with the door including said viewing window, said door further including means for removably mounting said screen therein comprising a frame carrying said screen and releasably holding said screen in an opening means in the door, said frame and screen being retained in said opening means by a frictional engagement of the frame with the opening means, said opening means comprising a surface portion of said door having a frame engaging surface that snugly engages the outer surface of said frame when the frame is in position in the door.

Claim 6

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall jointly defining a through opening and a cooling air passage extending vertically through said door; means at the bottom of said passage forming air inlet means in said door; means at the top of said passage forming air outlet means in said door; a viewing window across the rear of said through opening in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air and light permeable protective screen means in said door across the front of said through opening spaced outwardly of the exterior of said window for barring contact of said window from the exterior of the oven during operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings therethrough in communication with said air passage for entry of cooling air into said air passage at a plurality of different positions and including a position in the upper portion of said through opening and defining the outermost element in front of said window, said screen having air permeable openings over a substantial portion of the total screen surface thereby permitting viewing of the window through the screen and providing an abundance of air openings for passage of cooling air to the interior of the door in the viciniTy of said window, the air outlet means being provided at a higher elevation than said screen for permitting escape of heated air that is drawn into the door through the screen and that has become heated by contact with the door including said viewing window, said door further including means for removably mounting said screen therein comprising a frame carrying said screen and releasably holding said screen in an opening means in the door, said frame and screen being retained in said opening means by a frictional engagement of the frame with the opening means, said opening means comprising a surface portion of said door having a frame engaging surface that snugly engages the outer surface of said frame when the frame is in position in the door.

Claim 7

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a viewing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage, said door being provided with a baffle on an upper portion thereof spaced outwardly from said outer door panel, and said outer door panel including means forming cooling air outlet openings located behind said baffle and communicating with the cooling air passage in said door, said door having an inner wall member disposed in the cooling air passage in an upper portion of the door behind said outer door panel, and cooling air exits from the air outlet means via a passageway defined by the inside of the inner wall member and cooling air exits from behind the top edge of said baffle via a passageway defined by the outside of the inner wall member, said air outlet means being disposed on a top portion of the door.

Claim 8

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a viewing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage, said door being provided with a baffle on an upper portion thereof spaced outwardly from said outer door panel, and said outer door panel including means forming cooling air outlet openings located behind said baffle and communicating with the cooling air passage in said door, said door having an inner wall member disposed in the cooling air passage in an upper portion of the door behind said outer door panel, and cooling air exits from the air outlet means via a passageway defined by the inside of the inner wall member and cooling air exits from behind the top edge of said baffle via a passageway defined by the outside of the inner wall member, said air outlet means being disposed on a top portion of the door.

Claim 9

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a viewing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage; and a shutter in said door which is movable to an elevated position between the viewing window and the screen means during self-cleaning cycles, the shutter in said elevated position effectively blocking the flow of cooling air against the viewing window during the self-cleaning cycle.

Claim 10

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a viewing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage; and a shutter in said door which is movable to an elevated position between the viewing window and the screen means during self-cleaning cycles, the shutter in said elevated position effectively blocking the flow of cooling air against the viewing window during the self-cleaning cycle.

Claim 11

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a vieWing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage, said viewing window comprising a two pane window assembly having an inner pane adjacent the cooking space, and an outer pane spaced outwardly away from the inner pane, the outer pane having a reflective non-continuous metal coating applied to its outer surface.

Claim 12

An oven door for a high temperature oven comprising: an outer door panel; an inner wall in said door spaced inwardly from said outer door panel, said outer door panel and said inner wall defining a cooling air passage extending through said door; means forming air inlet means in said door communicating with said cooling air passage; means forming air outlet means in said door communicating with said air passage; a vieWing window in said door for viewing the interior of the oven and its contents during cooking cycles in said oven; and an air permeable protective screen means in said door opposite the exterior of said window for barring contact of said window from the exterior of the oven during high temperature operation of the oven and for viewing the interior of the oven during cooking cycles, said screen having air openings in communication with said air passage for entry of cooling air into said air passage, said viewing window comprising a two pane window assembly having an inner pane adjacent the cooking space, and an outer pane spaced outwardly away from the inner pane, the outer pane having a reflective non-continuous metal coating applied to its outer surface.

Claim 13

An oven door construction comprising: means defining a door having a through opening; transparent window means closing said opening while permitting viewing therethrough; air and light permeable barrier means across said opening forwardly of said window means and permitting viewing therethrough; means for conducting cooling air through said barrier means and upwardly between said window means and said barrier means for cooling each of said window and barrier means; impervious shutter means; and means for selectively disposing said shutter means between said barrier means and said window means to minimize radiant energy flow through said window means to said barrier means and permit said cooling air to flow through said barrier means at a plurality of different positions including a position in the upper portion of said through opening and upwardly between said barrier means and shutter means to remove heat energy from said shutter means and thereby effectively minimize the heating of said barrier means by heat flow forwardly through said window means.

Claim 14

An oven door construction comprising: means defining a door having a through opening; transparent window means closing said opening while permitting viewing therethrough; air and light permeable barrier means across said opening forwardly of said window means and permitting viewing therethrough; means for conducting cooling air through said barrier means and upwardly between said window means and said barrier means for cooling each of said window and barrier means; impervious shutter means; and means for selectively disposing said shutter means between said barrier means and said window means to minimize radiant energy flow through said window means to said barrier means and permit said cooling air to flow through said barrier means at a plurality of different positions including a position in the upper portion of said through opening and upwardly between said barrier means and shutter means to remove heat energy from said shutter means and thereby effectively minimize the heating of said barrier means by heat flow forwardly through said window means.

Claim 15

The oven door construction of claim 8, wherein said shutter means is spaced forwardly of said window means and rearwardly of said barrier means.

Claim 16

The oven door construction of claim 8 wherein each of said window means, barrier means, and shutter means has approximately the same effective area transversely across the door opening.