An adjustable collimator for shaping a beam of particles, such as for purposes of inspecting contents of a container. In one method embodiment, the present invention determines, following the failure of a coupling facility, which data was previously assigned to that coupling facility. Layer comprises a polyurethane binder and inorganic pigment, and layer comprises a polyurethane binder and organic polymeric particles. A counter adds one to a product count each time a force in a product identifying range is measured. The sheet processing apparatus further comprises a bending restrainer including a restraining member extending almost parallel to the processing tray and covering a portion of the ejecting side of the processing tray, the restraining member configured to restrain bending of sheets ejected from the processing tray to the loading tray.