FORMING, INSERTION AND END CRIMPING OF HELICAL COILS FOR BOOKBINDING
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United States of America Patent
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Issued Date -
Jun 17, 2010
app pub date -
Dec 11, 2008
filing date -
Dec 11, 2008
priority date (Note) -
Abandoned
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Abstract
Apparatus for binding a book with a helical plastic coil includes a forming mandrel for forming helical coils from a heated elongate plastics material with the coils being cooled on the mandrel and cut to length before being discharged onto an accumulator tray. The coils are individually transported at high speed from a discharge edge of the tray to the insertion device where the coils are inserted into aligned holes at an edge of respective collated books for binding the books. The coils on the tray are heated by a contact heater on the surface of the tray and/or by air blown over the tray to be kept at a temperature above 25 degrees C. to improve crimping of the ends after cutting of the coil to length in the book.
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