B - Operations – Transporting – 42 – B
Patent
B - Operations, Transporting
42
B
11/7
B42B 5/12 (2006.01)
Patent
CA 1124461
MACHINE AND METHOD FOR SPIRAL BINDING OF SHEET GROUPS WITH PLASTIC THREAD ABSTRACT OF THE DISCLOSURE A method and machine for feeding plastic thread from a bulk spool, forming the thread into a spiral configuration, and insert- ing 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.
345440
Macrae & Co.
Sickinger (hans) Co.
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