Millwork member of folded construction

Claim 2

A rabbetted one-piece door jamb comprising: a composition board core that is cut to form first, second, third, fourth, fifth and sixth successive sections assembled in a generally L-shaped configuration and defining a rectangular cavity extending therethrough, said first section being notched longitudinally to engage an end of said sixth section which extends in a direction generally perpendicular to said first section, said first and third sections extending generally parallel to one another and abutting against one another for substantially the entire length of said first section; and an exterior skin bonded to each of said core sections and extending completely around said core to form the exterior surface thereof.

Claim 3

The door jamb of claim 1 including an interruption in said skin forming a thermal barrier.

Claim 4

An integrally formed, one-piece rabbeted doorjamb member having a first door receiving surface perpendicular to a door plane; a second door receiving surface parallel to said door plane and perpendicular to said first door receiving surface, said door receiving surfaces meeting to define an inside corner in which a closed door can be received; an entrance surface perpendicular and adjacent to said second door receiving surface; a back surface perpendicular and adjacent to said entrance surface; an attachment surface perpendicular and adjacent to said back surface to allow securement of said member to an abutting wall; a front surface perpendicular and adjacent to said attachment surface at one end, and perpendicular and adjacent to said first door receiving surface at the opposite end; said member comprising: a composition board core having a plurality of longitudinal incisions extending the full length thereof, each of said incisions being shaped to define a V-shaped groove, the sides of which form a ninety-degree angle when said core is laid flat; and a bendable exterior skin bonded to said core on the side thereof opposite the direction faced by said grooves; said core and said skin being folded along said grooves so as to close said grooves and define a rectangular cavity extending through said core, said skin covering said core over each of said above-mentioned surfaces.

Claim 5

An integrally formed, one-piece rabbeted doorjamb member having a first door receiving surface perpendicular to a door plane; a second door receiving surface parallel to said door plane and perpendicular to said first door receiving surface, said door receiving surfaces meeting to define an inside corner in which a closed door can be received; an entrance surface perpendicular and adjacent to said second door receiving surface; a back surface perpendicular and adjacent to said entrance surface; an attachment surface perpendicular and adjacent to said back surface to allow securement of said member to an abutting wall; a front surface perpendicular and adjacent to said attachment surface at one end, and perpendicular and adjacent to said first door receiving surface at the opposite end; said member comprising: a composition board core having a plurality of longitudinal incisions extending the full length thereof, each of said incisions being shaped to define a V-shaped groove, the sides of which form a ninety-degree angle when said core is laid flat; and a bendable exterior skin bonded to said core on the side thereof opposite the direction faced by said grooves; said core and said skin being folded along said grooves so as to close said grooves and define a rectangular cavity extending through said core, said skin covering said core over each of said above-mentioned surfaces.

Claim 6

A doorjamb member as recited in claim 3 wherein each of said grooves extends through said core into said skin, whereby said skin is scored.

Claim 7

A doorjamb member as recited in claim 4 wherein said skin is wood.

Claim 8

A doorjamb member as recited in claim 3 wherein said composition board is fiberboard.

Claim 9

A doorjamb member as recited in claim 3 wherein said skin is acrylic or vinyl.

Claim 10

A doorjamb member as recited in claim 3 wherein said skin is aluminum.

Claim 11

A doorjamb member as recited in claim 3 wherein said composition board is fiberboard and said skin is acrylic or vinyl.

Claim 12

A doorjamb member as recited in claim 3 wherein said composition board is fiberboard and said skin is a wood veneer.

Claim 13

A doorjamb member as recited in claim 10 wherein said cavity is filled with a plastic.

Claim 14

A door joint member as recited in claim 3 wherein there are five of said grooves and six of said sections.

Claim 17

The method of claim 13 wherein said step of securing said panel is performed by gluing said sections in place.

Claim 18

The method of claim 13 further comprising the step of forming a notch extending longitudinally along one edge of said panel on the side thereof to which said skin is bonded, an edge of one of said sections being received by said notch when said panel is folded.

Claim 19

The method of claim 13 further comprising the step of filling said cavity with plastic foam.

Claim 20

The method of claim 13 further comprising the step of cutting said skin to form a thermal barrier.

Claim 21

The method of claim 13 further comprising the steps of: cutting a groove through said skin, thereby forming a thermal barrier; and inserting a weather strip in said groove.

Claim 22

The method of claim 13 wherein said grooves cut through said panel so as to score said skin.