Semi-automatic plastic spiral binding machine

Details Semi-automatic plastic spiral binding machine Semi-automatic plastic spiral binding machine

B - Operations, Transporting

42

B

B42B 9/00 (2006.01) B42B 5/12 (2006.01)

Patent

CA 2511904

A coil spreader system for use in and in combination with a spiral in a spiral bound book binding machine comprising a spreader for significantly spreading apart trailing and leading ends of said spiral prior to first and last holes of a row of holes in a book to be spirally bound to compensate for said first and last holes having bridge distances from ends of said book greater than the spacing of said holes, said spreader comprising two spreader members, one of said spreader members insertable within respective coils of said spiral at respective points before the leading edge of said spiral enters a final hole and another of said spreader members insertable within respective coils of said spiral at respective points at the trailing edge of said spiral before entry into said first hole, each of spreader members comprising a base with a blade attached at an oblique angle, said blade having a surface with a curved contour with a rounded corner to spread the leading and trailing edges of said spiral without damage to the spiral.

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