US3257734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for controlling tension in supported sheet material
Assignee: Consolidated Paper Bahamas Ltd
•
Filing: 1965-09-29
•
Granted: 1966-06-28
•
Expires: 1985-09-29
Abstract
No abstract record available.
Inventors
- 👤 John D Boadway
- 👤 James L Barlow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
D; D21; D21F; D21F1/00; D21F1/36; D21F1/365
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A METHOD OF MANUFACTURING PAPER WHICH COMPRISES FORMING A WEP PAPER WEB ON A FOURDRINER WIRE FROM PULP STOCK, DIRECTING SAID WET WEB ONTO A PAIR OF DRIVEN DRYER CYLINDERS, DRYING SAID WEB BY ENGAGEMENT WITH SAID CYLINDER WHILE APPLYING CONTINUOUS TRAVELLING MOVEMENT TO SAID WEB BY DRIVING SAID CYLINDERS, EACH SAID CYLINDER HAVING FLUCTUATIONS IN THE SPEED THEREOF DIFFERENT FROM THOSE OF THE OTHER SAID CYLINDER, SAID WEB NORMALLY ASSUMING A SUBSTANTIALLY STRAIGHT LINE PATH BETWEEN SAID CYLINDERS, SAID REDUCING THE FLUCTUATIONS IN TENSION OF SAID WEB AS A RESULT OF SAID DIFFERENTAL CYLINDER SPEED FLUCTUATIONS BY APPLYING A GASEOUS JET FROM AN ELONGATED JET OPENING ZONE TO ONE SURFACE OF SAID WEB BETWEEN SAID CYLINDERS AND EXTENDING TRANSVERSELY FROM EDGE TO EDGE OF SAID WEB TO DEFLECT FROM SAID STRAIGHT LINE PATH A LENGTH OF SAID WEB BETWEEN SAID CYLINDERS, AND CONTROLLING THE EXTENT OF DEFLECTION OF SAID DEFLECTED LENGTH TO COMPENSATE FOR SAID DIFFERENTIAL CYLINDER SPEED FLUCTUATIONS.
Claim 2
Independent Claim
160 words
A METHOD OF MANUFACTURING PAPER WHICH COMPRISES FORMING A WEP PAPER WEB ON A FOURDRINER WIRE FROM PULP STOCK, DIRECTING SAID WET WEB ONTO A PAIR OF DRIVEN DRYER CYLINDERS, DRYING SAID WEB BY ENGAGEMENT WITH SAID CYLINDER WHILE APPLYING CONTINUOUS TRAVELLING MOVEMENT TO SAID WEB BY DRIVING SAID CYLINDERS, EACH SAID CYLINDER HAVING FLUCTUATIONS IN THE SPEED THEREOF DIFFERENT FROM THOSE OF THE OTHER SAID CYLINDER, SAID WEB NORMALLY ASSUMING A SUBSTANTIALLY STRAIGHT LINE PATH BETWEEN SAID CYLINDERS, SAID REDUCING THE FLUCTUATIONS IN TENSION OF SAID WEB AS A RESULT OF SAID DIFFERENTAL CYLINDER SPEED FLUCTUATIONS BY APPLYING A GASEOUS JET FROM AN ELONGATED JET OPENING ZONE TO ONE SURFACE OF SAID WEB BETWEEN SAID CYLINDERS AND EXTENDING TRANSVERSELY FROM EDGE TO EDGE OF SAID WEB TO DEFLECT FROM SAID STRAIGHT LINE PATH A LENGTH OF SAID WEB BETWEEN SAID CYLINDERS, AND CONTROLLING THE EXTENT OF DEFLECTION OF SAID DEFLECTED LENGTH TO COMPENSATE FOR SAID DIFFERENTIAL CYLINDER SPEED FLUCTUATIONS.
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) | 1969-06-27 | 1969-12-27 | 1970-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-27 | 1973-12-27 | 1974-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $7700.00 | Window Closed / Lapsed |