US3285484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tensioning device for recorder chart paper
Assignee: Leeds and Northrup Co
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Filing: 1964-12-11
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Granted: 1966-11-15
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Expires: 1984-12-11
Abstract
No abstract record available.
Inventors
- 👤 Curtis R A Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:25
CPC Classifications
G; G01; G01D; G01D15/00; G01D15/24; G01D15/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
IN A RECORDER HAVING A CHART PAPER DRIVE ROLL, CHART PAPER DISPOSED ON A PORTION OF SAID DRIVE ROLL, MEANS ON SAID DRIVE ROLL FOR ENGAGING SAID CHART PAPER AND A DEVICE FOR MAINTAINING SAID CHART PAPER IN TENSION, THE IMPROVEMENT IN SAID DEVICE FOR MAINTAINING SAID CHART PAPER IN TENSION COMPRISING: A PLURALITY OF TENSION-DEVELOPING MEMBERS DISPOSED ADJACENT SAID PAPER DRIVE ROLL AND HAVING A PLURALITY OF RESILIENT AND DEFORMABLE FINGERS EXTENDING THEREFROM, A PORTION OF WHICH FINGERS INTERFERINGLY ENGAGES SAID CHART PAPER DISPOSED ON SAID CHART PAPER ROLL, AND
Claim 2
Dependent Claim
91 words
IN A RECORDER HAVING A CHART PAPER DRIVE ROLL, CHART PAPER DISPOSED ON A PORTION OF SAID DRIVE ROLL, MEANS ON SAID DRIVE ROLL FOR ENGAGING SAID CHART PAPER AND A DEVICE FOR MAINTAINING SAID CHART PAPER IN TENSION, THE IMPROVEMENT IN SAID DEVICE FOR MAINTAINING SAID CHART PAPER IN TENSION COMPRISING: A PLURALITY OF TENSION-DEVELOPING MEMBERS DISPOSED ADJACENT SAID PAPER DRIVE ROLL AND HAVING A PLURALITY OF RESILIENT AND DEFORMABLE FINGERS EXTENDING THEREFROM, A PORTION OF WHICH FINGERS INTERFERINGLY ENGAGES SAID CHART PAPER DISPOSED ON SAID CHART PAPER ROLL, AND
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) | 1969-11-14 | 1970-05-16 | 1970-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-14 | 1974-05-16 | 1974-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-14 | 1978-05-16 | 1978-11-15 | $7700.00 | Window Closed / Lapsed |