US3842668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for checking moving webs of paper or the like,relative to flaws
Assignee: Individual
•
Filing: 1971-12-08
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Granted: 1974-10-22
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Expires: 1991-12-08
Abstract
Abstract A device for detecting flaws in a moving web in which one side of the web is supported and opposed to the support are pivotally mounted feeler elements which control contacts in circuit with a signalling device. The feelers are supported on a common beam which is moveable perpendicular to the plane of the web and transversely thereto and which is also tiltable relative to the plane of the web to move the feelers into and out of operative position.
Inventors
- 👤 P Lippke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:57
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/34; G01N33/346
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
276 words
A device for checking of a web of paper, or the like, to detect the presence of flaws therein and comprising: a machine frame, guide means in the frame to engage a web being checked on one side to guide the web in a predetermined plane, and checking means in the frame on the other side of web in opposed relation to said guide means, said checking means comprising a beam parallel to said plane and extending transversely to the direction of travel of said web, a plurality of adjustable feelers rotatably journalled to said beam having two opposite ends connected to shaft means which are rotatably journalled in said machine frame in side by side relation on an axis parallel to the beam and having feeler elements thereon to engage the web being checked, a pair of contact means electrically connected to signal means and biased normally closed under the control of said feelers whereby movement of a feeler upon engagement of a flaw in the web by the feeler element on the respective feeler will release said contact means to signal the presence of flaws, bearings in the frame rotatably supporting the ends of the beam in the frame, first means for adjusting said bearings in the frame in a direction perpendicular to said plane, second means for adjusting said bearings in said frame in the direction of the length of said plane, third means connected to said beam for rotation thereof about the axis of said bearings, and cooperating elements of abutment means operatively connected to said beam and to said frame to stop said beam in the checking position of said feelers.
Claim 2
Independent Claim
276 words
A device for checking of a web of paper, or the like, to detect the presence of flaws therein and comprising: a machine frame, guide means in the frame to engage a web being checked on one side to guide the web in a predetermined plane, and checking means in the frame on the other side of web in opposed relation to said guide means, said checking means comprising a beam parallel to said plane and extending transversely to the direction of travel of said web, a plurality of adjustable feelers rotatably journalled to said beam having two opposite ends connected to shaft means which are rotatably journalled in said machine frame in side by side relation on an axis parallel to the beam and having feeler elements thereon to engage the web being checked, a pair of contact means electrically connected to signal means and biased normally closed under the control of said feelers whereby movement of a feeler upon engagement of a flaw in the web by the feeler element on the respective feeler will release said contact means to signal the presence of flaws, bearings in the frame rotatably supporting the ends of the beam in the frame, first means for adjusting said bearings in the frame in a direction perpendicular to said plane, second means for adjusting said bearings in said frame in the direction of the length of said plane, third means connected to said beam for rotation thereof about the axis of said bearings, and cooperating elements of abutment means operatively connected to said beam and to said frame to stop said beam in the checking position of said feelers.
Claim 3
Dependent Claim
43 words
A device according to claim 1 in which said first means comprises eccentric bushings interposed between said bearings and said frame, further actuating means for rotating the bushings in the frame, and means for clamping the bushings in adjusted position in the frame.
Claim 4
Dependent Claim
50 words
A device according to claim 1 in which said feelers at one end of said beam are more closely spaced than at the other end thereof, and means for supporting at least the feelers near one end of the beam in feeling position in the absence of a web therebeneath.
Claim 5
Dependent Claim
68 words
A device according to claim 1 in which said beam has shaft elements on the opposite ends extending through said bearings, said second means comprising a sleeve itself fixed but reciprocably receiving each shaft and each sleeve being moveably mounted in said frame except as to axial movement being precluded, and nut means rotatably but nonaxially moveably connected to each shaft element and threadedly engaging the respective sleeve.
Claim 6
Dependent Claim
39 words
A device according to claim 4 in which said first means includes an eccentric bushing interposed between each sleeve and said frame, means for angularly adjusting said eccentric bushing, and means for clamping the eccentric bushings in adjusted positions.
Claim 7
Dependent Claim
36 words
A device according to claim 5 in which said third means comprises an arm fixed to at least one of said shafts, and fluid motor means connected to said arm to rotate the shaft and beam.
Claim 8
Dependent Claim
52 words
A device according to claim 1 in which shaft elements pass through said beam and on the opposite ends thereof extending through said bearings, said third means comprising an arm fixed to at least one of said shafts, and fluid motor means connected to said arm to rotate the shaft and beam.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |