Round back binder
AssigneeThe Mead Corporation
InventorJon R. Wyant
Life of this patent
Estimating the term…
Abstract
A binder having a rectangular stiffener board and a sheet retaining assembly. The stiffener board is provided in its first surface with at least three spaced parallel channels medially located between the side edges of the board. Each channel defines a hinge line extending along the height of the stiffener board. The sheet retaining assembly is mounted on the first surface of the board adjacent to the channels but outside the medial section of the board where the channels are located. The binder thus structured allows the stiffener board to define front and rear cover of the binder interconnected by the medial section which is foldable conformingly about the retaining assembly.
Claims21
A binder comprising:
- a generally rectangular paperboard stiffener comprising a pair of leaf panels separated by and joined to a medially positioned spine section and having an interior surface provided with a plurality of parallel and partially penetrating channels extending along said spine section for the full height thereof to define at least three flexible hinge lines and an oppositely disposed exterior surface;
- an interior surface sheet secured to the interior surface of said stiffener;
- an exterior surface sheet secured to the exterior surface of said stiffener;
- and
- sheet retaining means mounted on said interior surface sheet and secured to said stiffener adjacent and parallel to said hinge lines;
- whereby said surface sheets and said stiffener cooperatively define front and rear covers foldably interconnected by a segmented spine which hinges conformingly about said sheet retaining means to enable closure of said binder.
In a binder comprising a rear cover, a spine foldably joined to said rear cover, a front cover foldably joined to said spine opposite said rear cover and sheet retaining means secured to said rear cover parallel and adjacent said spine, the improvement wherein said spine comprises:
- a flexible backing means,
- a plurality of relatively stiff medial strips bonded to said backing means and extending substantially the full height of said binder, said medial strips extending in spaced parallel relation and cooperating with said backing means to define parallel surface channels between said medial strips,
- interior surface sheet means bonded to said medial strips and extending conformingly into said channels,
- exterior surface sheet means bonded to said backing sheet opposite said interior surface sheet;
- said spine being foldable along said channels for conformance about said sheet retaining means.
A binder comprising:
- a generally rectangular stiffener board having upper and lower edges and a pair of side edges, one of the surfaces of said stiffener board being provided with at least three spaced parallel and partially penetrating channels medially located between said side edges, each of said channels defining a hinge line extending the full height of said stiffener board;
- surface sheet means covering said stiffener board so that said surface sheet means and said stiffener board cooperatively define a segmented spine in the region of said channels, a front cover joined to said spine and extending therefrom to one of said side edges, and a rear cover joined to said spine opposite said front cover and extending to the other one of said side edges;
- and
- sheet retaining means for releasably holding sheets to be bound by said binder, said retaining means being mounted on said rear cover adjacent said segmented spine, so that said segmented spine and said front cover fold conformingly around said retaining means.
Dependencies are inferred from the claim text.