Patent US5357812A successfully refreshed from Google Patents.
US5357812A
Expired / Lapsed
US
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Web stress measuring assembly
Assignee: Koenig and Bauer AG
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Filing: 1993-08-13
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Granted: 1994-10-25
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Expires: 2013-08-13
Abstract
Abstract Stress in a paper web in a rotary printing press is measured by directing the web past two tubular members spaced in the direction of web travel and supported by support arms. Deflection of the support arms is measured and provides an indication of the amount of stress in the paper web.
Inventors
- 👤 Thomas Kubert
- 👤 Erhard H. Glockner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:45
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/10; G01L5/106; B; B65; B65H; B65H23/00; B65H23/04; B65H23/044
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
189 words
A web stress measuring assembly which is usable to measure the stress in a paper web in a web-fed rotary printing press, said web stress measuring assembly comprising: first and second supports secured to a press frame on first and second sides of a path of paper web travel; first support arms secured to said first and second supports and having free ends extending upstream along said path of paper web travel; second support arms secured to said first and second supports and having free ends extending downstream along said path of paper web travel; a first tubular member having air nozzles secured between said upstream ends of said first support arms; a second tubular member having air nozzles secured between said downstream ends of said second support arms, a paper web traveling along said path of paper web travel, passing alternatingly over and under said first and second tubular members; and means for measuring flexure in said first and support second arms caused by a paper web traveling over and under said first and second tubular members and evaluating said flexure to determine stress in a paper web.
Claim 2
Dependent Claim
189 words
A web stress measuring assembly which is usable to measure the stress in a paper web in a web-fed rotary printing press, said web stress measuring assembly comprising: first and second supports secured to a press frame on first and second sides of a path of paper web travel; first support arms secured to said first and second supports and having free ends extending upstream along said path of paper web travel; second support arms secured to said first and second supports and having free ends extending downstream along said path of paper web travel; a first tubular member having air nozzles secured between said upstream ends of said first support arms; a second tubular member having air nozzles secured between said downstream ends of said second support arms, a paper web traveling along said path of paper web travel, passing alternatingly over and under said first and second tubular members; and means for measuring flexure in said first and support second arms caused by a paper web traveling over and under said first and second tubular members and evaluating said flexure to determine stress in a paper web.
Claim 3
Dependent Claim
22 words
The web stress measuring assembly of claim 1 wherein compressed air is provided to said air nozzles to provide an air cushion.
Claim 4
Dependent Claim
26 words
The web stress measuring assembly of claim 2 wherein said compressed air is supplied to said tubular members through air supply hoses from an air supply.
Claim 5
Dependent Claim
45 words
The web stress measuring assembly of claim 1 wherein said means for measuring flexure in said first and second support arms includes strain gauges secured to said support arms first and second intermediate said first and second supports and said free upstream and downstream ends.
Claim 6
Dependent Claim
45 words
The web stress measuring assembly of claim 1 wherein said means for measuring flexure in said first and second support arms includes inductive travel pickups secured to said supports and positioned adjacent said upstream and downstream free ends of said first and second support arms.
Claim 7
Dependent Claim
30 words
The web stress measuring assembly of claim 1 wherein said path of paper web travel has a wrap angle of 20° to 30° about said first and second tubular members.
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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) | 1997-10-24 | 1998-04-25 | 1998-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-24 | 2002-04-25 | 2002-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-24 | 2006-04-25 | 2006-10-25 | $7700.00 | Window Closed / Lapsed |