Case made ring binder and method of fabricating same

Details Case made ring binder and method of fabricating same Case made ring binder and method of fabricating same

1993-08-27

1995-08-15

Payer, Hwei Siu

Binder device releasably engaging aperture or notch of sheet

Depository

Face member with back member

281 29, B42F 302

Patent

active

054413575

ABSTRACT:
A case made ring binder for holding a plurality of loose-leaf papers or the like and a method of fabricating the same. In one embodiment, the case made ring binder comprises three rectangular, spaced apart, stiffener panels arranged as a front cover panel, a rear cover panel and a spine panel, respectively. An oversized, rectangular cover sheet is affixed to the outside surfaces of the three stiffener panels using a dry, heat-actuable adhesive, and the four marginal edges of the cover sheet are turned over the corresponding edges of the three stiffener panels. A wet glue is then used to affix the inturned edges overlying the front and rear cover panels to the inside surfaces thereof. A flat backplate having means for mounting a conventional ring mechanism is then affixed to the inside surface of the spine panel using a dry, heat-actuable adhesive. Next, an inside liner sheet which is appropriately dimensioned to overlie the four inturned edges of the cover sheet and the exposed portions of the front cover panel, rear cover panel and backplate, is affixed thereto using a dry-heat actuable adhesive. At the same time, the backplate and spine panel are made curved. The liner sheet comprises a paper-based substrate and a plastic film applied to the top surface of the paper-based substrate to provide reinforcement thereto. Finally, a ring mechanism is fixedly attached to the backplate.

REFERENCES:
patent: 1983883 (1934-12-01), Schade
patent: 3190678 (1965-06-01), Peterson et al.
patent: 3215450 (1965-11-01), Peterson et al.
patent: 3277505 (1966-10-01), Peterson et al.
patent: 4289330 (1981-09-01), Wiermanski
patent: 4583877 (1986-04-01), Wilson
patent: 4600346 (1986-07-01), Podosek
patent: 5160209 (1992-11-01), Schuessler

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