coil spreader for spiral binding machines

Details coil spreader for spiral binding machines coil spreader for spiral binding machines

2005-02-08

2005-02-08

Wellington, Andrea L. (Department: 3722)

Bookbinding: process and apparatus

Apparatus

Edge binding apparatus

C412S003000, C412S033000, C412S038000, C412S039000, C425S143000, C425S160000, C140S092400, C140S092700, C140S092940

Reexamination Certificate

active

06851907

ABSTRACT:
A binding machine and method for spirally binding a sheaf of papers into a book uses an adjustable speed drive to rotate a flexible plastic spiral element into respective holes in the book. The book has a plurality of holes in a row adjacent one edge of the book to receive the leading edge of the spiral bonding elements. A cylindrically shaped mandrel is spaced apart from a glidable block. The plastic pre-formed spiral binding element is fed onto the mandrel from the distal end thereof, with the leading edge of the binding element facing and spaced apart from the book. A pair of leading edge spreaders, one of which has a guidance groove, engages the plastic spiral to spread its coils just enough to permit it to enter the successive holes of a sheaf to be bound. A trailing spreader at the opposite end insures that the last hole is accommodated with a portion of the spiral coil.

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