Patent ID: 7263809

Claim:
A shingle comprising a shingle neck; a shingle body; a first shingle shoulder disposed on a first side between the shingle neck and the shingle body; a first male undercut zone projecting on a top side of the first shoulder; a second shingle shoulder ( 4 ) disposed on a second side between the shingle neck and the shingle body; a second male undercut zone projecting on a top side of the second shoulder; a raised engagement and guide element disposed on an inner side of the shingle body and in a lower region of the shingle body and disposed remote from the shingle neck forming a female mold undercut zone ( 6 ) and wherein the first male undercut zone matches the shape of the part of the raised engagement and guide element on the second side for engaging the first male undercut zone with a part of another raised engagement and guide element on another second side of a second shingle constructed like the first shingle and wherein the second male undercut zone matches the shape of the part of the raised engagement and guide element on the first side for engaging the second male undercut zone with a part of another raised engagement and guide element on another first side of a third shingle constructed like the first shingle; wherein the raised engagement and guide element ( 5 ) is disposed in the lower region of the shingle body ( 2 ), wherein the raised engagement and guide element ( 5 ) defines a female mold undercut zone ( 6 ) open on a downward side and extending horizontally along the shingle body and having a deepest point adjacent to the shingle body.