Abstract: A roof panel seamer which is self-propelled and bidirectional for forming a standing seam joining two adjacent metal roof panels. Two seamers are disclosed, one for forming a 90° seam and the other for forming a 180° seam. Friction wheels, rather than gears, are used to transfer power from the main support body to the auxiliary support body of the seamer. The seamer includes five roll forming stations, the leading three of which are effective for each direction of travel. One of the roll forming stations for each direction of travel in the 90° seamer imparts a curve to the leg being bent. In the 90° seamer, a guide finger is mounted to both ends of one of the main and auxiliary support bodys, with the guide finger being effective to contact the underside of the male portion of the seam and maintain a minimum clearance between the male and female portions as the male and female portions enter the seamer.

Abstract: A roof panel seamer which is self-propelled and bidirectional for forming a standing seam joining two adjacent metal roof panels. Two seamers are disclosed, one for forming a 90° seam and the other for forming a 180° seam. Friction wheels, rather than gears, are used to transfer power from the main support body to the auxiliary support body of the seamer. The seamer includes five roll forming stations, the leading three of which are effective for each direction of travel. One of the roll forming stations for each direction of travel in the 90° seamer imparts a curve to the leg being bent. In the 90° seamer, a guide finger is mounted to both ends of one of the main and auxiliary support bodys, with the guide finger being effective to contact the underside of the male portion of the seam and maintain a minimum clearance between the male and female portions as the male and female portions enter the seamer.