Pre-creased sheet metal coil stock

Abstract

A stock sheet metal coil is pre-creased such that upon removal of sheet metal from the coil, the resulting sheet metal strip may be easily and accurately bent or formed along the crease, forming flashing, ducting, or like structures of consistent straightness in any desired length up to the length of the coil. For flashing, the crease is typically formed centrally, between the two ends of the coiled sheet metal to form a flashing of the appropriate angle. Multiple creases may be provided to allow the accurate forming of other structures, such as sluices, gutters, or ducts or conduits in any desired length, reducing connections. Accurate forming may be done at the job site by hand bending at a bead or hand pressing over a wooden block or metal base.

1 . Pre-creased sheet metal coil stock having an upper end, a lower end, an inner end and an outer end, and defining a central axis, said coil stock defining at least one crease therein, each said crease being spaced from said upper end, and extending the length of said sheet metal coil between said inner end and said outer end and perpendicular to said central axis.  
   
   
       2 . The pre-creased sheet metal coil stock of  claim 1 , wherein said coil stock defines a single crease centrally located and equally spaced between said upper end and said lower end of said coil stock.  
   
   
       3 . The pre-creased sheet metal coil stock of  claim 2 , wherein said crease is one of a “U”-shaped crease and a “V”-shaped crease.  
   
   
       4 . The pre-creased sheet metal coil stock of  claim 1 , wherein said coil stock defines a plurality of creases spaced between said upper end and said lower end of said coil stock.  
   
   
       5 . The pre-creased sheet metal coil stock of  claim 4 , wherein said plurality of creases includes at least one of a “U”-shaped crease and at least one of a “V”-shaped crease.  
   
   
       6 . The pre-creased sheet metal coil stock of  claim 5 , wherein said plurality of creases includes at least one of an outward crease and an inward crease.  
   
   
       7 . A pre-creased sheet metal flashing coil stock having an upper end, a lower end, an inner end and an outer end, and defining a central axis, said coil stock defining a single crease centrally located and equally spaced between said upper end and said lower end of said coil stock, said crease being spaced from said upper end, and extending the length of said sheet metal coil between said inner end and said outer end and perpendicular to said central axis.  
   
   
       8 . The pre-creased sheet metal flashing coil stock of  claim 7 , wherein said crease is one of a “U”-shaped crease and a “V”-shaped crease.  
   
   
       9 . A pre-creased sheet metal conduit or duct coil stock having an upper end, a lower end, an inner end and an outer end, and defining a central axis, said coil stock defining at least three spaced creases, each said crease being spaced from said upper end, and extending the length of said sheet metal coil between said inner end and said outer end and perpendicular to said central axis.  
   
   
       10 . A pre-creased sheet metal conduit or duct coil stock wherein said spaced creases are spaced so as to form a rectangular conduit or duct upon bending of said coil stock along said spaced creases.  
   
   
       11 . The pre-creased sheet metal conduit or duct coil stock of  claim 10 , said coil stock defining an overlap crease spaced from one of said upper end and said lower end and parallel with said at least three spaced crease for forming an overlap upon bending of said coil stock along said spaced creases and along said overlap crease.  
   
   
       12 . The pre-creased sheet metal conduit or duct coil stock of  claim 11 , wherein said three spaced creases are equally spaced from one of said upper end and said lower end of said coil stock and said overlap crease being spaced from the other of said upper end and said lower end so as to form a square conduit or duct upon bending along said spaced creases and said overlap crease.  
   
   
       13 . The pre-creased sheet metal conduit or duct coil stock of  claim 12 , wherein each of said equally spaced creases and said overlap crease are each defined as an outward crease.  
   
   
       14 . The pre-creased sheet metal conduit or duct coil stock of  claim 12 , wherein each of said equally spaced creases and said overlap crease are each defined as an inward crease.