| 摘要 |
<p>MACHINE AND METHOD FOR SPIRAL BINDING OF SHEET GROUPS WITH PLASTIC THREAD A method and machine for feeding plastic thread from a bulk spool, forming the thread into a spiral configuration, and inserting the spiral into a perforated sheet group so that it may be cut and bent to form a spiral binder. The machine and process is continuous and includes a first section in which the thread is softened as it moves around a mandrel, a second section where the formed thread is cooled and a final section at which the coil is fed into a perforated sheet group.</p> |
