Abstract: A system for processing a continuous web of envelope stock includes a web aligner, infeed nip including a load cell, rotary cutter, gummer, patch applicator, buffer, and control system. Gummer nozzles are actuated to apply patterns of adhesive to the moving web in surrounding relation to window apertures. A method for controlling the web output rate from the system includes receiving at the control system an input web tension indicator from the nip load cell, receiving an output web tension indicator from a transducer at system output, comparing the received indicators and transmitting a control signal to actuate a roller assembly between the infeed nip and the transducer to increase or decrease speed to adjust web tension. The control system also transmits a web input speed control or stop signal based on the calculated capacity percentage of web accumulated in the buffer, which is determined with reference to a threshold value.

Abstract: A reusable envelope tray system includes a stacking tray with linear structural corrugations and a support unit. The tray bottom has parallel side fold lines extending along the corrugations and parallel end fold lines transverse to the corrugations. A sidewall extends upwardly from each bottom side fold line, and an end wall extends upwardly from each bottom end fold line. Each end wall has an outer portion connected to the bottom wall and an inner portion connected to the outer portion. Fold lines connect the inner and outer portions to provide a bearing surface during stacking. The outer portion includes a hand hole and the inner portion includes a return hinge extending transverse to the corrugations and reachable through the hand hole. The hinge allows bending of the inner portion under folding assembly/disassembly of the tray. The support unit has upstanding posts received in apertures on the tray bottom.