A sheet bending device (122, 508) comprising: a support member (124, 522); a sheet shaping rail (126, 510) comprising a stationary shaping rail portion (128, 512, 514) securely mounted on the support member and an articulating shaping rail portion (130, 518, 520) pivotally mounted on the support member (124, 522), wherein the stationary shaping rail portion (128, 512, 514) has a first leg, a second leg and a middle leg, the legs (228, 230) connected to one another to provide the stationary shaping rail portion (128, 512, 514) with a generally U-shaped configuration, and the articulating shaping rail portion (130, 518, 520) is pivotally mounted on the support member (124, 522) with one end of the articulating shaping rail portion (130, 518, 520) adjacent an end of the first leg of the stationary shaping rail portion (128, 512, 514) and an opposite end of the articulating shaping rail portion (130, 518, 520) adjacent an end of the second leg of the stationary shaping rail portion (128, 512, 514), wherein moving the articulating shaping rail portion (130, 518, 520) from a non-shaping position to a shaping position moves the articulating shaping rail portion (130, 518, 520) toward the middle leg of the stationary shaping rail portion (128, 512, 514); a force biasing member (320, 400, 576, 614) operatively connected to the articulating shaping rail portion (130, 518, 520) to move the articulating shaping rail portion (130, 518, 520) from the non-shaping position to the shaping position, and a retention member securely mounted on the middle leg of the stationary shaping rail portion (128, 512, 514) of the sheet shaping rail (126, 510) to limit movement of a sheet to be shaped (148, 500) relative to the stationary shaping rail portion (128, 512, 514) characterized by the retention member having a cylindrical bottom portion and a cone shaped top portion, wherein the cone shaped portion engages a peripheral edge of the sheet to be shaped (148, 500) when the sheet to be shaped (148, 500) is positioned on the stationary shaping rail portion (128, 512, 514) such that the sheet (148, 500) can slide down the surface of the cone shaped portion and thereafter along the outer surface of the cylindrical shaped portion to align the sheet (148, 500) with the stationary shaping rail portion (128, 512, 514) of the shaping rail (126, 510), the cylindrical shaped portion of the retention member engaging the peripheral edge of the sheet to be shaped (148, 500) to limit movement of the sheet to be shaped (148, 500) over the stationary shaping rail portion (128, 512, 514) toward the middle leg of the stationary shaping rail portion (128, 512, 514) as the articulating shaping rail portion (130, 518, 520) moves from the non-shaping position to the shaping position. a support member (124, 522); a sheet shaping rail (126, 510) comprising a stationary shaping rail portion (128, 512, 514) securely mounted on the support member and an articulating shaping rail portion (130, 518, 520) pivotally mounted on the support member (124, 522), wherein the stationary shaping rail portion (128, 512, 514) has a first leg, a second leg and a middle leg, the legs (228, 230) connected to one another to provide the stationary shaping rail portion (128, 512, 514) with a generally U-shaped configuration, and the articulating shaping rail portion (130, 518, 520) is pivotally mounted on the support member (124, 522) with one end of the articulating shaping rail portion (130, 518, 520) adjacent an end of the first leg of the stationary shaping rail portion (128, 512, 514) and an opposite end of the articulating shaping rail portion (130, 518, 520) adjacent an end of the second leg of the stationary shaping rail portion (128, 512, 514), wherein moving the articulating shaping rail portion (130, 518, 520) from a non-shaping position to a shaping position moves the articulating shaping rail portion (130, 518, 520) toward the middle leg of the stationary shaping rail portion (128, 512, 514); a force biasing member (320, 400, 576, 614) operatively connected to the articulating shaping rail portion (130, 518, 520) to move the articulating shaping rail portion (130, 518, 520) from the non-shaping position to the shaping position, and a retention member securely mounted on the middle leg of the stationary shaping rail portion (128, 512, 514) of the sheet shaping rail (126, 510) to limit movement of a sheet to be shaped (148, 500) relative to the stationary shaping rail portion (128, 512, 514) characterized by the retention member having a cylindrical bottom portion and a cone shaped top portion, wherein the cone shaped portion engages a peripheral edge of the sheet to be shaped (148, 500) when the sheet to be shaped (148, 500) is positioned on the stationary shaping rail portion (128, 512, 514) such that the sheet (148, 500) can slide down the surface of the cone shaped portion and thereafter along the outer surface of the cylindrical shaped portion to align the sheet (148, 500) with the stationary shaping rail portion (128, 512, 514) of the shaping rail (126, 510), the cylindrical shaped portion of the retention member engaging the peripheral edge of the sheet to be shaped (148, 500) to limit movement of the sheet to be shaped (148, 500) over the stationary shaping rail portion (128, 512, 514) toward the middle leg of the stationary shaping rail portion (128, 512, 514) as the articulating shaping rail portion (130, 518, 520) moves from the non-shaping position to the shaping position.