Method and construction for binding calendars and the like

Details Method and construction for binding calendars and the like Method and construction for binding calendars and the like

B - Operations, Transporting

42

B

11/4

B42B 5/12 (2006.01) B42B 5/08 (2006.01)

Patent

CA 1113662

METHOD AND CONSTRUCTION FOR BINDING CALENDARS AND THE LIKE ABSTRACT OF THE DISCLOSURE A method and construction for binding wide groups of sheets such as calenders so that they may be opened without sheet offset and com- pletely folded back. The method comprises the steps of forming a ser- ies of elongated openings along one edge of the sheet group, providing flat binding strips, and feeding the binding strip toward the apertures while simultaneously deforming the binding strips just before they en ter the apertures so as to cause them to have a coiled shape, whereby the binding strips will be fed in curved fashion through the apertures and their ends will overlap to form individual circular coils. The construction of the invention comprises means for feeding a flat binder strip toward the aperture in the sheet group, means in mediately adjacent to the aperture in the path of the binding strip being fed and so positioned as to deflect the binding strip into the aperture and cause it to deflect so as to form a coil, and means for continuing to feed the binding strip in circular fashion so that it ends overlap to form an individual coil passing through the aperture and around the edge of the sheet group. If the binding strip is of plastic material, the invention further comprises heating means positioned in advance of the deflecting means to temporarily soften the plastic. a

331928

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