Abstract: A thermally exposed laminate is passed between the nip of a pair of peel and pressure rollers toward a pair of tab and deflector rollers which are movable through an arcuate path, such that, the tab roller initiates separation of the disposable sheet from the retained sheet and pulls the disposable sheet between the driven tab and peel rollers, while the retained sheet is contacted by the deflector roller for bending of the sheet around the pressure roller. The disposable and retained sheets are traversed through divergent paths, respectively to waste and to the next processing stage.

Abstract: A sheet clamping system for high speed rotatable drums is provided in which light-weight clamping bars, formed of relatively thin metal sheet stock, are configured and/or oriented for maximum resistance to deflection radially of the axis of drum rotation as well as positively secured in a sheet medium clamping position at axially spaced intervals along the length of the drum. The system further includes centrifugally actuated, axially extending rods positioned to underlie the operative portion of each clamping bar in a manner such that leading and trailing edges of a retained sheet are sandwiched between the rods and the clamping bars under a clamping force generally proportional to the square of drum rotational speeds.