Interlocking door seam

Abstract

An interlocking door seam provides a stronger seam for double doors, making them less subject to attack by prybars and the like. Particularly for central mail stations (CMS) and central box units CBU, double doors present there are subject to attack by prybars and the like that force the locks and allow thieves to rifle the contents of the enclosed mail boxes. Attachment of interlocking door seam of the present invention to the first edge of the first double doors protects that first edge from prybar attacks. The adjoining edge of the second double door then releasably fits into a convex strip that protects the adjoining edge of the second double door, thereby protecting it from prybar attack. The interlocking door seam allows normal operation of the double doors while decreasing the risk to the central mail station of prybar attack at the seam between the double doors. Flanges present along the free edge of the convex strip provide easy engagement of that free edge. Gaps between such flanges accommodate shelving inside the central mail station. Construction of the interlocking door seam of the present invention by tempered steel or hard and durable materials provides enhanced protection from prybar attack.

What is claimed is:  
     
         1 . An interlocking door seam for preventing double doors having adjoining edges from being pried apart, comprising: 
 a first concave strip conforming to a first adjoining edge of a first door of said double doors, said first concave strip attachable to said first adjoining edge, said first concave strip generally extending along the entirety of said first adjoining edge to shield said first adjoining edge from prybars and the like; and    a second convex strip connected to and generally aligned with said first concave strip, said second convex strip able to releasably receive a second adjoining edge of a second door of said double doors, said second convex strip generally extending along the entirety of said second adjoining edge to shield said second adjoining edge from prybars and the like; whereby    a seam present between two double doors may be protected from attack by prybars and the like by attaching said first concave strip to said first door and fitting said second door into said second convex strip when said first and second doors are closed.    
     
     
         2 . The interlocking door seam of    claim 1   , further comprising: 
 said first concave and said second convex strips accommodating an overlap of the double doors to prevent exposure of a pryable seam between overlapping double doors.    
     
     
         3 . The interlocking door seam of    claim 1   , further comprising: 
 said first concave strip having a relatively wide interstitial space to accommodate an angled edge of said first adjoining edge of said first door.    
     
     
         4 . The interlocking door seam of    claim 1   , wherein said second convex strip further comprises: 
 angled flanges, said angled flanges angled away from said second convex strip and said first concave strip, said angled flanges facilitating reception of said second adjoining door edge by said second convex strip.    
     
     
         5 . The interlocking door seam of    claim 4   , wherein said angled flanges further comprise: 
 angled flanges defining gaps between said angled flanges, said gaps able to receive and accommodate protruding shelves.    
     
     
         6 . The interlocking door seam of    claim 1   , further comprising: 
 said first concave and second convex strips sharing a common side.    
     
     
         7 . The interlocking door seam of    claim 1   , wherein said first concave strip further comprises: 
 an extending flange, said extending flange providing greater connective surface for attachment of said first concave strip to said first adjoining door edge.    
     
     
         8 . The interlocking door seam of    claim 1   , wherein the interlocking door seam complies with postal regulations and accommodates double doors used for central postbox stations.  
     
     
         9 . The interlocking door seam of    claim 1   , further comprising: 
 said first concave and second convex strips forming a cross section generally similar to an “S” or “Z” shape.    
     
     
         10 . An interlocking door seam for preventing double doors having adjoining edges from being pried apart, the interlocking door seam complying with postal regulations and accommodating double doors used for central postbox stations, comprising: 
 a first concave strip conforming to a first adjoining edge of a first door of said double doors, said first concave strip attachable to said first adjoining edge, said first concave strip generally extending along the entirety of said first adjoining edge to shield said first adjoining edge from prybars and the like, said first concave strip having a relatively wide interstitial space to accommodate an angled edge of said first adjoining edge of said first door, said first concave strip having an extending flange, said extending flange providing greater connective surface for attachment of said first concave strip to said first adjoining door edge; and    a second convex strip connected to and generally aligned with said first concave strip, said second convex strip able to releasably receive a second adjoining edge of a second door of said double doors, said second convex strip generally extending along the entirety of said second adjoining edge to shield said second adjoining edge from prybars and the like, said second convex strip having angled flanges angled away from said second convex strip and said first concave strip, said angled flanges facilitating reception of said second adjoining door edge by said second convex strip, said angled flanges defining gaps between said angled flanges, said gaps able to receive and accommodate protruding shelves or the like;    said first concave and second convex strips sharing a common side and accommodating an overlap of the double doors to prevent exposure of a pryable seam between overlapping double doors, said first concave and second convex strips forming a cross section generally similar to an “S” or “Z” shape; whereby    a seam present between two double doors may be protected from attack by prybars and the like by attaching said first concave strip to said first door and fitting said second door into said second convex strip when said first and second doors are closed.    
     
     
         11 . A central mail box station for providing a plurality of mail delivery post boxes, comprising: 
 an external body having an interior and protecting said interior from ambient weather including wind and rain;    first and second oppositely opposed double doors opening outwardly from a shared central area coupled to said external body;    a first concave strip conforming to a first adjoining edge said first, said first concave strip connected to said first adjoining edge, said first concave strip generally extending along the entirety of said first adjoining edge to shield said first adjoining edge from prybars and the like; and    a second convex strip connected to and generally aligned with said first concave strip, said second convex strip able to releasably receive said second door, said second convex strip generally extending along the entirety of said second adjoining edge to shield said second adjoining edge from prybars and the like; whereby    a seam present between said first and second doors may be protected from attack by prybars and the like by attachment of said first concave strip to said first door and fitting said second door into said second convex strip when said first and second doors are closed.    
     
     
         12 . The central mail box station of    claim 11   , wherein said interlocking door seam further comprises: 
 said first concave and said second convex strips accommodating an overlap of said first and second double doors to prevent exposure of a pryable seam between said overlapping double doors.    
     
     
         13 . The central mail box station of    claim 11   , wherein said interlocking door seam further comprises: 
 said first concave strip having a relatively wide interstitial space to accommodate an angled edge of said first adjoining edge of said first double door.    
     
     
         14 . The central mail box station of    claim 11   , wherein said interlocking door seam further comprises: 
 angled flanges, said angled flanges angled away from said second convex strip and said first concave strip, said angled flanges facilitating reception of said second adjoining door edge by said second convex strip.    
     
     
         15 . The central mail box station of    claim 11   , wherein said angled flanges further comprise: 
 angled flanges defining gaps between said angled flanges, said gaps able to receive and accommodate protruding shelves present in said interior of said central mail box station.    
     
     
         16 . The central mail box station of    claim 11   , wherein said interlocking door seam further comprises: 
 said first concave and second convex strips sharing a common side.    
     
     
         17 . The central mail box station of    claim 11   , wherein said first concave strip further comprises: 
 an extending flange, said extending flange providing greater connective surface for attachment of said first concave strip to said first adjoining door edge.    
     
     
         18 . The central mail box station of    claim 11   , wherein said interlocking door seam complies with postal regulations and accommodates double doors used for central postbox stations.  
     
     
         19 . The central mail box station of    claim 11   , wherein said interlocking door seam further comprises: 
 said first concave and second convex strips forming a cross section generally similar to an “S” or “Z” shape.    
     
     
         20 . A central mail box station for providing a plurality of mail delivery post boxes, comprising: 
 an external body having an interior and protecting at least one postbox present in said interior from ambient weather including wind and rain;    first and second oppositely opposed double doors opening outwardly from a shared central area, said first and second double doors coupled to said external body;    a first concave strip conforming to a first adjoining edge of said first double door, said first concave strip attached to said first adjoining edge, said first concave strip generally extending along the entirety of said first adjoining edge to shield said first adjoining edge from prybars and the like, said first concave strip having a relatively wide interstitial space to accommodate an angled edge of said first adjoining edge of said first double door, said first concave strip having an extending flange, said extending flange providing greater connective surface for attachment of said first concave strip to said first adjoining door edge; and    a second convex strip connected to and generally aligned with said first concave strip, said second convex strip able to releasably receive a second adjoining edge of said second double door, said second convex strip generally extending along the entirety of said second adjoining edge to shield said second adjoining edge from prybars and the like, said second convex strip having angled flanges angled away from said second convex strip and said first concave strip, said angled flanges facilitating reception of said second adjoining door edge by said second convex strip, said angled flanges defining gaps between said angled flanges, said gaps able to receive and accommodate protruding shelves or the like;    said first concave and second convex strips sharing a common side and accommodating an overlap of the first and second double doors to prevent exposure of a pryable seam between said overlapping double doors, said first concave and second convex strips forming a cross section generally similar to an “S” or “Z” shape; whereby    a seam present between said first and second double doors may be protected from attack by prybars and the like by attachment of said first concave strip to said first door and fitting said second door into said second convex strip when said first and second double doors are closed.