US3758219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loose leaf notebook sheet lifter
Assignee: Individual
•
Filing: 1971-03-23
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Granted: 1973-09-11
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Expires: 1991-03-23
Abstract
Abstract A device for lifting or turning the pages of a loose leaf notebook simultaneously so that the openings of the individual pages do not get caught and torn by the notebook rings, the device consisting of tensioning hook units which at one end are anchored to the notebook rings and at their other ends are hooked over the notebook edges so that when the notebook is closed, all the pages move on the rings simultaneously as one unit to prevent individual sheets or pages getting hung up on the hooks.
Inventors
- 👤 R Stasio
- 👤 T Butera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:58
CPC Classifications
B; B42; B42F; B42F13/00; B42F13/40; B42F13/408
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
355 words
A sheet lifter for a looseleaf notebook, for turning a group of pages together simultaneously as one unit, so to prevent individual turning and hanging up of a single page on the notebook rings and becoming torn thereby, said sheet lifter comprising a panel made of stiff material of uniform thickness, said panel being rectangular and having a singular cylindrically arcuately curved portion along one longitudinal end of said panel, and which extends the entire length thereof, while the entire remaining other longitudinal end forms a singular flat portion that starts adjacent said curved portion so that a longitudinal corner is formed between said cylindrically arcuate portion and said flat portion, said arcuate portion being entirely on one side of a flat plane of said panel flat portion, said arcuate portion being displaced from said flat plane in a transverse direction towards its convex side so that the concave side faces the flat plane, and the longitudinal panel edge that is adjacent the curved portion is approximately alined with said flat plane said cylindrically arcuate portion having a series of openings along an edge of said panel for being engaged by said notebook rings, a narrow transversely extending flat band of stiff material being secured at its one end to a convex surface of said arcuate portion by a single rivet in the vicinity near which it is adjacent said flat portion, a major part of said band extending adjacent one side of said panel flat portion and extending transversely thereacross beyond an opposite edge of said panel, the oposite end of said band being looped and secured to a center of a V-shaped spring steel wire which has a hook formed at each opposite end for being engaged around the outer side edges of a notebook cover; said panel in operative use being positioned between an inner side of said notebook cover and said pages of said notebook, whereby tension of said spring steel wire draws said panel in a direction toward said hooks so that said arcuate portions prevent said single pages to lag behind other pages when said notebook is being closed.
Claim 2
Dependent Claim
355 words
A sheet lifter for a looseleaf notebook, for turning a group of pages together simultaneously as one unit, so to prevent individual turning and hanging up of a single page on the notebook rings and becoming torn thereby, said sheet lifter comprising a panel made of stiff material of uniform thickness, said panel being rectangular and having a singular cylindrically arcuately curved portion along one longitudinal end of said panel, and which extends the entire length thereof, while the entire remaining other longitudinal end forms a singular flat portion that starts adjacent said curved portion so that a longitudinal corner is formed between said cylindrically arcuate portion and said flat portion, said arcuate portion being entirely on one side of a flat plane of said panel flat portion, said arcuate portion being displaced from said flat plane in a transverse direction towards its convex side so that the concave side faces the flat plane, and the longitudinal panel edge that is adjacent the curved portion is approximately alined with said flat plane said cylindrically arcuate portion having a series of openings along an edge of said panel for being engaged by said notebook rings, a narrow transversely extending flat band of stiff material being secured at its one end to a convex surface of said arcuate portion by a single rivet in the vicinity near which it is adjacent said flat portion, a major part of said band extending adjacent one side of said panel flat portion and extending transversely thereacross beyond an opposite edge of said panel, the oposite end of said band being looped and secured to a center of a V-shaped spring steel wire which has a hook formed at each opposite end for being engaged around the outer side edges of a notebook cover; said panel in operative use being positioned between an inner side of said notebook cover and said pages of said notebook, whereby tension of said spring steel wire draws said panel in a direction toward said hooks so that said arcuate portions prevent said single pages to lag behind other pages when said notebook is being closed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |