초록 ▼

A book-like storage container for cassettes or the like is formed from a single thermoplastic sheet of PVC plastic which has a pair of stackable trays formed on an inner face thereof that are connected together by an integral spine in side-by-side relation. Each tray is defined by C-shaped walls and

A book-like storage container for cassettes or the like is formed from a single thermoplastic sheet of PVC plastic which has a pair of stackable trays formed on an inner face thereof that are connected together by an integral spine in side-by-side relation. Each tray is defined by C-shaped walls and the spine has flanges adjacent each end thereof for interlocking with the interfitting walls of the trays when the holder is in a closed position to form an enclosure therein. The PVC sheet has a living hinge defined therein along the connecting edges of the spine and each of its respective trays. In a preferred embodiment, a second thermoplastic sheet of flexible vinyl is placed back-to-back with the PVC sheet and thermally bound thereto about the sheets\peripheries. The PVC sheet is notched at the intersection of each living hinge and the periphery of the PVC sheet, so that when the peripheries of the PVC sheet and vinyl sheet are thermally bound together, there is no thermal seam at those notches. During the heat sealing step of holder formation, the vinyl sheet is gathered toward the spine section thereof by urging it down between the living hinges of the PVC sheet. This aids in eliminating wrinkling of the vinyl sheet and in keeping it properly formed in all opened and closed positions of the holder.

대표청구항 ▼

A book-like holder comprising: a first one-piece flexible sheet having integral front and rear flap portions and an integral spine cover section between the flap portions connecting the flap portions in laterally spaced side-by-side relation; a second one piece stiff molded sheet having a raised tra

A book-like holder comprising: a first one-piece flexible sheet having integral front and rear flap portions and an integral spine cover section between the flap portions connecting the flap portions in laterally spaced side-by-side relation; a second one piece stiff molded sheet having a raised tray portion on the inner face of each flap portion of said first sheet and an integral spine liner section between the tray portions, the spine liner section connecting the tray portions in laterally spaced side-by-side relation along spaced, generally parallel connecting edges of the spine liner section and covering the spine cover section of said first sheet, the second sheet having a lowered ridge portion defining the connecting edges of the spine liner section and creating a living hinge between each tray portion and the spine liner section; and a bond connecting said first and second sheets together around the peripheries thereof except at points immediately adjacent to the lowered ridge portions, and the tray portions on the front and rear flap portions being formed to stack together when the holder is placed in a closed position. A method of making a book-like holder which comprises: thermal forming a first thermoplastic sheet to define a pair of adjoining stackable trays on a first side of the first sheet, with the trays in side-by-side relation and connected by an integral spine liner section, the thermal forming also defining a pair of parallel raised ridges on a second side of the first sheet, with each of the raised ridges creating a living hinge in the first sheet extending along and defining connecting edges of each tray and the spine liner section; cutting a notch out of the periphery of the first sheet at the intersection of each raised ridge with the periphery of the first sheet; covering the second side of the first thermoplastic sheet with a second thermoplastic sheet; and heat sealing the first and second sheets together around the peripheries thereof so that the peripheries of the first and second sheets are sealed together except at the notches of the first sheet to provide a book-type holder with front and rear cover panels, interlocking trays on the inner faces of the cover panels and a spine connecting the cover panels.