Packaged door casing and pre-hung door

Claim 1

IN A PRE-ASSEMBLED DOOR AND CASING, SAID CASING HAVING SIDE AND TOP FRAME MEMBERS INCLUDING JAMB PORTIONS WHICH IN THE ASSEMBLED DOOR AND CASING EXTEND ALONG THE SIDE END FACES AND TOP END FACE OF SAID DOOR AND INCLUDING FLANGES EXTENDING LATERALLY OUTWARD OF THE PLANE OF SAID JAMB PORTIONS, MEANS HINGEDLY SECURING ONE SIDE END FACE OF SAID DOOR TO ONE CASING SIDE FRAME MEMBER, THE END FACES OF SAID DOOR CONFRONTING THE JAMB PORTIONS OF THE OTHER CASING SIDE FRAME MEMBER AND THE TOP FRAME MEMBER HAVING FORMED THEREIN LONGITUDINALLY EXTENDING OUTWARDLY OPENING UNDERCUT T-SHAPED SLOTS, L-SHAPED CLIP MEANS RETAINING THE ASSEMBLED DOOR AND CASING IN FIXED RELATION WITH RESPECT TO EACH OTHER, SAID CLIP MEANS INCUDING PLANAR LEGS JOINED ALONG A COMMON EDGE, A TSHAPED LOCKING MEMBER FORMED INTEGRALLY WITH AND EXTENDING OUTWARDLY OF ONE OF SAID PLANAR LEGS, THE STEM PORTION OF SAID T-SHAPED LOCKING MEMBER BEING FORMED AS A BOSS EXTENDING IN AN AXIALLY NORMAL DIRECTION FROM THE OUTER FACE OF ONE OF SAID PLANAR LEGS, SAID BOSS BEING DIMENSIONED TO BE INSERTABLE THROUGH AND ROTATABLE IN THE ENTRANT PORTION OF SAID UNDERCUT T-SHAPED SLOT, THE CROSS PORTION OF SAID T-SHAPED LOCKING MEMBER BEING FORMED AS A PLANAR OBLONG SHAPED FLANGE ON THE OUTER END OF SAID BOSS DISPOSED IN A PLANE PARALLEL WITH RESPECT TO THE PLANE OF SAID ONE CLIP LEG, THE SHORTER DIMENSION OF SAID OBLONG SHAPED FLANGE BEING LESS THAN THE WIDTH OF THE ENTRANT PORTION OF SAID UNDERCUT T-SHAPED SLOT, FOR INSERTION OF SAID FLANGE THERETHROUGH, THE OVERALL LONGER DIMENSION OF SAID FLANGE BEING EQUAL TO THE WIDTH OF SAID UNDERCUT T-SHAPED SLOT, THE DIAGONALLY OPPOSITE CORNER PORTIONS OF SAID FLANGES BEING FORMED ON A RADIUS SUCH THAT SAID CLIP MEANS IS TURNABLE THROUGH 90* TO EFFECT ENGAGEMENT OF THE LENGTHWISE END OF SAID FLANGE WITH THE SIDE WALLS DEFINING THE UNDERCUT PORTION OF SAID T-SHAPED SLOT FOR ORIENTING SAID CLIP MEANS SO THAT THE OTHER LEG OF SAID CLIP MEANS IN SAID TURNED POSITION OF SAID CLIP MEANS IS DISPOSED IN PLANAR OVERLYING ENGAGEMENT WITH SAID CASING FRAME FLANGE, AND MEANS COOPERATING WITH SAID OTHER LEG SECURING SAID CLIP MEANS TO SAID CASING FRAME MEMBER FLANGE.