Doors and methods for reducing telegraphing therefor
This invention relates to doors having internal blocking components that reduce or eliminate telegraphing of the outer surface of the door facings. In particular, the invention relates to steel-edge steel doors that have internal solid wood blocks that have one or more integral cantilever beams formed into the blocks to interact with the adjoined oppositely arranged door facings in order to eliminate visually apparent door telegraphing. The blocks are modified to contain notches formed therein to form the cantilever beams.
1. A steel-edge steel door, comprising:
a horizontally extending top rail;
a horizontally extending bottom rail;
first and second cooperating door facings positioned on opposing sides of the rails, each of the door facing having an edge extending perpendicularly to the rails and formed from steel;
a core disposed between the door facings; and
a stile block adjacent to the edge of the door facings and positioned between the top and bottom rails, the stile block having a first end facing the top rail, a second end facing the bottom rail, and a length less than the length of the edge of the door facings, wherein the stile block has at least two first parallel notches extending from the first end away from the top rail, and at least two second parallel notches extending from the second end away from the bottom rail, the first and second parallel notches terminate remote from each other.
2. The steel-edge steel door of claim 1 , wherein the stile block extends a portion of the length of the associated edge.
3. The steel-edge steel door of claim 2 , further comprising a lock block, the stile block disposed between to the lock block and the edge.
4. The steel-edge steel door of claim 1 , wherein the notches extend parallel to each other and to the door facings.
5. The steel-edge steel door of claim 1 , wherein the notches extending from the first and second ends have a uniform length.
6. The steel-edge steel door of claim 5 , wherein the notches have a uniform width.
7. The steel-edge steel door of claim 1 , wherein the notches extending from the first and second ends are longitudinally aligned.
8. The steel-edge steel door of claim 7 , wherein the stile block contains a cutout section along its length at an edge thereof, and one of the notches extends along the cutout section.
9. The steel-edge steel door of claim 8 , wherein the cutout section comprises a width and a height of about 20% to about 45% of the width of the stile block.
10. The steel-edge steel door of claim 1 , wherein the core comprises one of polyurethane foam, polystyrene foam, minerals, or cardboard.