Multi-layered fire door and method for making the same
First Claim
Patent Images
1. A door comprising:
- a porous layer having two opposing major surfaces;
at least three fire-retardant layers each comprising a fiberboard and coupled with the porous layer in an unbalanced construction, wherein a number of the at least three fire-retardant layers disposed on one of the two opposing major surfaces of the porous layer is greater than a number of the at least three fire-retardant layers disposed on another one of the two opposing major surfaces of the porous layer;
a first exterior layer; and
a second exterior layer, wherein the first exterior layer is coupled with one of the at least three fire retardant layers and the second exterior layer is coupled with another one of the at least three fire-retardant layers.
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Abstract
A door has a core that includes a porous layer having a thickness and two opposing major surfaces. In one construction, the core also includes three fire-retardant layers, and two of the fire-retardant layers are separated by the porous layer. The porous layer and the fire-retardant layers are coupled together. Other constructions include one or more fire-retardant layers in balanced or unbalanced placement around the porous layer.
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Citations
17 Claims
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1. A door comprising:
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a porous layer having two opposing major surfaces; at least three fire-retardant layers each comprising a fiberboard and coupled with the porous layer in an unbalanced construction, wherein a number of the at least three fire-retardant layers disposed on one of the two opposing major surfaces of the porous layer is greater than a number of the at least three fire-retardant layers disposed on another one of the two opposing major surfaces of the porous layer; a first exterior layer; and a second exterior layer, wherein the first exterior layer is coupled with one of the at least three fire retardant layers and the second exterior layer is coupled with another one of the at least three fire-retardant layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification