Pre-assembled, pre-hung door unit

Claim 1

A SHIPPABLE, PRE-ASSEMBLED, PRE-HUNG DOOR UNIT ADAPTED FOR INSTALLATION IN SUCH PRE-ASSEMBLED CONDITION IN A ROUGH OPENING OF A ROOM OR THE LIKE COMPRISING A PAIR OF VERTICAL SIDE JAMBS, A HORIZONTAL HEADER SPANNING AND CONNECTING SAID JAMBS, DOOR MEANS PRE-HUNG TO AT LEAST ONE OF SAID JAMBS, REMOVABLE SPACER MEANS POSITIONED IN THE SPACE BETWEEN THE TOP EDGE OF SAID DOOR MEANS AND THE FACING SURFACE OF THE BOTTOM EDGE OF SAID HEADER FOR SPACING SAID DOOR MEANS FROM SAID HEADER, ADHESIVE STRIP MEANS ADHESIVELY SECURED TO SAID HEADER AND TO SAID DOOR MEANS AND SPANNING SAID SPACE TO PREVENT ACCIDENTAL REMOVAL OF SAID SPACER MEANS FROM SAID SPACE, A REMOVABLE MEMBER SPANNING THE BOTTOM EDGE SURFACE OF SAID DOOR MEANS AND SECURED TO SAID SIDE JAMBS, AND ADHESIVE STRIP MEANS ADHESIVELY SECURED TO SAID DOOR MEANS AND TO SAID MEMBER TO HOLD SAID MEMBER ADJACENT THE BOTTOM EDGE OF SAID DOOR MEANS IN POSITION FOR PREVENTING MOVEMENT OF SAID DOOR MEANS RELATIVE TO SAID SIDE JAMBS, SAID ADHESIVE STRIP MEANS, SAID SPACER MEANS AND SAID MEMBER BEING DISCARDABLE AFTER INSTALLATION OF SAID DOOR UNIT IN SAID ROUGH OPENING OF A ROOM.