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US 4,307,972 AGranted
Looseleaf books with plastic posts
OwnerDominic R. Errichielloinventor
Life of this patent
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OwnerDominic R. Errichielloinventor
Estimating the term…
One piece, molded looseleaf books adapted to hold paper sheets with punched holes therein, certain of said books having a spine with front and rear walls and a back wall connected at its longitudinal edges to the front and rear walls by integrally molded living hinges; a rear cover panel and a front cover panel respectively connected to said front and rear walls by a living hinge, a plurality of tubular posts mounted on the rear wall and extending toward the front wall, and a plurality of plugs respectively comprising a stem mounted on the front wall and a head sized and positioned to slidably and frictionally seat in each tubular post when the front and rear walls were pivoted to be substantially parallel; and others of said books being two piece, molded books without a spine between the front and rear cover panels, which have an integrally molded strip connected to each panel by a living hinge, a plurality of posts on the lower strip, and post-penetrated holes on the upper strip.
A looseleaf book comprising an integrally molded, thermoplastic polymer, rear section embodying a rear cover panel connected integrally to a rear strip, said rear strip having a plurality of integrally molded thermoplastic polymer posts formed on and projecting at right angles from the inner face of said rear strip;
A looseleaf book comprising an integrally molded, thermoplastic polymer, rear section embodying a rear cover panel connected integrally to a rear strip, said rear strip having a plurality of integrally molded thermoplastic polymer posts formed on and projecting at right angles from the inner face of said rear strip;
Dependencies are inferred from the claim text.