B - Operations – Transporting – 42 – D
Patent
B - Operations, Transporting
42
D
281/3
B42D 3/00 (2006.01)
Patent
CA 1215410
ABSTRACT An improved book cover structure of the general type having an integral backbone and front and back covers connected to the backbone via spaced parallel score lines to enable the front and back covers to flex relative to the backbone. A backbone strip of hot melt adhesive is secured on an inside face area of the backbone. Spacer means for positioning the outermost sheets in engagement with the backbone strip are provided and comprise cover strips of hot melt adhesive secured to inside surface areas of the front and back covers adjacent to the score lines with reduced area portions of the cover strips extending across the score lines.
415225
Livingston Paul H.
Murfitt Donald
Wang James C.
General Binding Corporation
Smart & Biggar
LandOfFree
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