| 摘要 |
<p>The assembly is for automatically spot gluing printed sheets on a folding machine. The assembly comprises an applicator head, an internally defined cylinder interconnected with a source of fluid pressure, and a reciprocally displaceable piston disposed within the cylinder for selectively engaging to be glued. The piston includes a glue output orifice adapted to contact a printed sheet to be folded and glued in a folded condition. The orifices is in fluid flow communication with a glue input source. In a single action assembly a return spring resets the piston after each spot gluing operation, and in double action assembly fluid pressure is utilised to automatically rest the piston at a preselected instant.</p> |
