US3591013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hanger for flexible sheet material
Assignee: Mohawk Precision Corp
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Filing: 1967-01-03
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Granted: 1971-07-06
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Expires: 1987-01-03
Abstract
Abstract A hanger for temporarily holding sheet material by wedging action of rollers between convergent walls, including a special lip on the end of the front wall to prevent improper insertion and to assist release of improperly inserted sheets.
Inventors
- 👤 Pieter Von Herrmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:06
CPC Classifications
B; B42; B42F; B42F15/00; B42F15/06; B42F15/066; A; A47; A47G; A47G1/00; A47G1/16; A47G1/20; A47G1/21; A47L; A47L13/00; A47L13/10; A47L13/50; A47L13/51; A47L13/512; G; G09; G09F; G09F1/00; G09F1/10; Y; Y10; Y10T; Y10T24/00; Y10T24/20; Y10T24/207
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
In a hanger of the type having longitudinally extending downwardly convergent front and rear planar walls defining an elongated recess therebetween open at the bottom for the insertion of flexible sheet material and having a plurality of wedging rollers disposed in said recess and tangent to the front and rear walls at first and second points respectively, the improvement comprising: a terminating longitudinal lip portion disposed on the lower end of the front wall and extending toward said rear wall, said lip being so shaped and disposed that lines drawn tangent to the lip through said first and second points form first and second angles respectively with the rear wall which are substantially greater than the angle of convergence between front and rear walls.
Claim 2
Dependent Claim
124 words
In a hanger of the type having longitudinally extending downwardly convergent front and rear planar walls defining an elongated recess therebetween open at the bottom for the insertion of flexible sheet material and having a plurality of wedging rollers disposed in said recess and tangent to the front and rear walls at first and second points respectively, the improvement comprising: a terminating longitudinal lip portion disposed on the lower end of the front wall and extending toward said rear wall, said lip being so shaped and disposed that lines drawn tangent to the lip through said first and second points form first and second angles respectively with the rear wall which are substantially greater than the angle of convergence between front and rear walls.
Claim 3
Dependent Claim
23 words
The improvement according to claim 1 wherein said first and second angles are both on the order of twice said angle of convergence.
Claim 4
Dependent Claim
30 words
The improvement according to claim 1 wherein said angle of convergence is on the order of 20* and wherein said first and second angles are on the order of 40*.
Claim 5
Dependent Claim
227 words
A hanger for flexible sheet material comprising: an elongated extrusion defining a vertical rear wall, a front wall converging downwardly toward the rear wall, a top wall integral with and connecting the front and rear wall, said walls defining an elongated recess having an open mouth at the bottom between said front and rear walls, a plurality of rollers disposed loosely end-to-end in said recess for gripping sheet material, said rollers being tangent to front and rear walls at first and second points respectively, said front and rear walls forming an angle of convergence on the order of 20*, said front wall defining a terminating lip portion therealong extending toward the rear wall and being spaced from the bottom of said rollers, said lip portion being oriented so that a line drawn tangent to the end of said lip portion through said first point forms a first angle with the rear wall on the order of 40* and a line drawn tangent to the end of said lip portion through said second point intersects the lower portion of said rollers, whereby sheet material pulled outward against the lip portion will release if in wedging engagement with the rear wall while sheet material in wedging engagement with the front wall and pulled downward will flex over the lip portion and be drawn at said first angle to release.
Claim 6
Dependent Claim
227 words
A hanger for flexible sheet material comprising: an elongated extrusion defining a vertical rear wall, a front wall converging downwardly toward the rear wall, a top wall integral with and connecting the front and rear wall, said walls defining an elongated recess having an open mouth at the bottom between said front and rear walls, a plurality of rollers disposed loosely end-to-end in said recess for gripping sheet material, said rollers being tangent to front and rear walls at first and second points respectively, said front and rear walls forming an angle of convergence on the order of 20*, said front wall defining a terminating lip portion therealong extending toward the rear wall and being spaced from the bottom of said rollers, said lip portion being oriented so that a line drawn tangent to the end of said lip portion through said first point forms a first angle with the rear wall on the order of 40* and a line drawn tangent to the end of said lip portion through said second point intersects the lower portion of said rollers, whereby sheet material pulled outward against the lip portion will release if in wedging engagement with the rear wall while sheet material in wedging engagement with the front wall and pulled downward will flex over the lip portion and be drawn at said first angle to release.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |