Claims for Patent: 7,856,779

Summary for Patent: 7,856,779

Title:	Method of manufacturing a molded door skin from a flat wood composite, door skin produced therefrom, and door manufactured therewith
Abstract:	A method of manufacturing a hollow core door is disclosed, as well as a corresponding hollow core door. The method includes the steps of providing a solid flat door skin, moisturizing the flat skin, applying a conditioning resin thereto, pre-heating the flat door skin, and thereafter pressing the flat door skin between a pair of heated platens in a press in order to reform the flat skin into a molded skin including a plurality of panels defined therein. The press continuously closes in order to reform the flat skin into the molded skin, with the rate of press closure being a function of the determined hardness of the flat skin to be reformed. The resulting door skins have an improved bond strength, and are efficiently manufactured.
Inventor(s):	Moyes; Hartley (West Yorkshire, GB)
Assignee:	Masonite Corporation (Tampa, FL)
Application Number:	09/985,673
Patent Claims:	1. A hollow core door comprising: a door frame; and first and second door skins attached to said door frame so as to define a hollow core area there between, at least one of said skins being a reformed molded wood composite door skin having molded therein a plurality of panels, wherein said at least one molded door skin has a bond strength of at least about 2.0 N/mm.sup.2. 2. The door of claim 1, wherein each of the first and second door skins is a molded door skin having a bond strength of at least about 2.5 N/mm.sup.2. 3. The door of claim 1, wherein each of said first and second door skins is a molded door skin formed by pressing a loose bat or mat into a wood composite flat door blank having a density of at least about 550 kg/m.sup.3, and thereafter moisturizing, heating, and reforming in a press said flat door blank into a molded door skin having the panels molded therein, so that the bond strength of each of the skins is increased relative to that of the original flat blanks from which they are formed. 4. The door of claim 1, wherein said one molded door skin has an exteriorly disposed side having a moisture impervious barrier thereon. 5. The door of claim 4, wherein said moisture impervious barrier is selected from the group consisting of melamine impregnated crepe paper, phenolic resin crepe paper, and cross-linked polymeric resin. 6. The door of claim 1, wherein said one molded door skin has a substantially constant density. 7. The door of claim 1, wherein said one molded door skin has an outer planar portion, an inner planar portion, and a contoured portion between and integral with said outer and inner planar portions. 8. The door of claim 7, wherein said outer planar portion lies on a plane that is coplanar with the plane of said inner planar portion. 9. The door of claim 7, wherein said contoured portion includes an angled offset portion. 10. The door of claim 7, wherein said contoured portion has a thickness differing from the thickness of said outer and inner planar portions. 11. The door of claim 1, wherein said one molded door skin has an exteriorly disposed side having a pigmented sealer thereon. 12. The door of claim 11, wherein said pigmented sealer provides a uniform colored surface. 13. The door of claim 1, further comprising a foam filling the hollow core area. 14. A hollow core door comprising: a door frame having opposite first and second sides; a first door skin attached to said first side of said door frame, said first door skin comprising a first reformed molded wood composite having a plurality of panels and a bond strength of at least about 2.0 N/mm.sup.2; and a second door skin attached to said second side of said door frame to establish a hollow core area between said first and second door skins, said second door skin comprising a second reformed molded wood composite having a plurality of panels and a bond strength of at least about 2.0 N/mm.sup.2. 15. The door of claim 14, wherein the first and second reformed molded wood composites each have a density of from about 550 kg/m.sup.3 to about 1200 kg/m.sup.3. 16. The door of claim 14, wherein the first and second reformed molded wood composites each have a density of from about 800 kg/m.sup.3 to about 1200 kg/m.sup.3. 17. The door of claim 16, wherein said first and second reformed molded wood composites each have a bond strength of at least 2.5 N/mm.sup.2. 18. The door of claim 14, further comprising first and second sealers applied to exterior surfaces of said first and second door skins, respectively. 19. The door of claim 14, further comprising first and second moisture impervious barriers applied to exterior surfaces of said first and second door skins, respectively. 20. The door of claim 14, further comprising a foam filling the hollow core area.

Details for Patent 7,856,779

Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Approval Date	Patent No.	Expiredate
Emergent Biosolutions Canada Inc.	BAT	botulism antitoxin heptavalent (a, b, c, d, e, f, g) - (equine)	Solution	125462	03/22/2013		2040-01-29