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US 6,321,505 B1Granted
Metal door and method of production
AssigneeIngersoll-Rand Architectural Hardware Group Limited
InventorsBarry Kenneth Packman, Steven Knight
Life of this patent
Estimating the term…
Abstract
A door comprising two metal panels and an internal core structure. The panels have their edges formed around a perimeter sub-frame of channel construction, the base of the channel being internally adjacent the respective edge of the door. Opposing edges of the panels are seam welded together to provide a flush finish, and the base of the channel is apertured to act as a heat sink and to allow weld gas to escape.
Claims13
A door comprising:
- a sub-frame having a base surface and defining first and second spaced apart faces and a given perimeter;
- first and second external panels covering the first and second faces, the first and second panels abutting along the sub-frame base surface to define a seam substantially about the perimeter;
- a weld bead adjoining the first and second panels along the perimeter seam to close the perimeter seam and thereby complete a substantially continuous external surface enclosing the sub-frame;
- and
- the sub-frame base surface having at least one aperture therethrough in alignment with the perimeter seam such that the perimeter seam crosses the aperture, the aperture permitting the passage of weld gas.
2 more elements
A method of producing a door comprising the steps of:
- assembling a sub-frame having a base surface, first and second spaced apart faces and a given perimeter;
- providing the sub-frame with at least one aperture therethrough;
- press forming first and second external panels about the first and second faces and the base surface such that the first and second panels abut along the base surface to define a seam substantially about the perimeter and in alignment with the aperture such that the perimeter seam crosses the aperture;
- providing a weld bead adjoining the first and second panels along the perimeter seam to close the perimeter seam and thereby complete a substantially continuous external surface enclosing the sub-frame, the aperture permitting the passage of weld gas during the provision of the weld bead.
1 more element
A method of producing a door comprising the steps of:
- forming a base surface with at least one aperture therethrough;
- assembling the base surface to define a sub-frame having first and second spaced apart faces and a perimeter having a rectangular configuration with four corners;
- press forming first and second external panels about the first and second faces and the base surface such that the first and second panels abut along the base surface to define a perimeter seam which extends substantially about the perimeter and in alignment with the aperture such that the perimeter seam crosses the aperture, and a corner seam adjacent to each sub-frame corner, each corner seam extending substantially perpendicular to the perimeter seam;
- and
- providing a weld bead adjoining the first and second panels along the perimeter seam and the corner seams to close the perimeter seam and the corner seams and thereby complete a substantially continuous external surface enclosing the sub-frame, the aperture permitting the passage of weld gas during the provision of the weld bead.
2 more elements
Dependencies are inferred from the claim text.