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US3834263A
Expired / Lapsed
US
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Apparatus for sensing and measuring tension of tow entering a staple fiber cutter
Assignee: Eastman Kodak Co
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Filing: 1973-11-30
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Granted: 1974-09-10
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Expires: 1993-11-30
Abstract
Abstract Apparatus for sensing and measuring tension of a tow entering a staple fiber cutter, such as the staple fiber cutter disclosed in the Coffin et al., U.S. Pat. No. 3,557,648. The tow describes a circular path as it continuously is guided onto the cutter at various points around the periphery of the cutter to be wrapped therearound. Thus the tow continuously changes direction, thereby generating a force with a constant vertical component and a variable horizontal component. The apparatus senses and measures only the vertical components of force and includes a guide roll located above the cutter and on the axis of the cutter for guiding the tow to the cutter and mounted on a pivotally mounted lever, the axis of the lever lying generally in the same plane as the axis of the guide roll. A transducer bears against the lever to maintain the generally same plane of the two axes and to sense and measure the movement of the lever and hence only the vertical components of force exerted by the tow on the lever.
Inventors
- 👤 G Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:24
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/04; Y; Y10; Y10S; Y10S83/00; Y10S83/913; Y10T; Y10T83/00; Y10T83/141; Y10T83/148; Y10T83/323; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4838; Y10T83/849; Y10T83/852
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
339 words
In an apparatus for cutting elongated, flexible material into predetermined shorter lengths, the apparatus including a horizontally positioned cutter having knives spaced at predetermined intervals around the periphery of the cutter with their edges positioned in vertical planes and facing radially outwardly of the cutter, a driven member movable in a path around the cutter and having a guide mounted thereon for movement therewith for engaging and guiding the elongated material onto and around the cutter for wrapping the material therearound against the knife edges, and wherein the elongated material is guided from above the apparatus to the guide on the movable driven member, the material thus defining a circular path at the location where the material engages the moving guide as the elongated material changes direction and hence generates variable horizontal and constant vertical components of force in engaging the guide at different locations of the moving guide around the cutter prior to being guided by the guide to the cutter, the invention comprising an apparatus for sensing and measuring the tension of the elongated material being wrapped around the cutter by sensing only the vertical components of force and comprising: lever means positioned above the cutter and pivotally mounted about a horizontal axis for rotative movement in a vertical plane; said lever means having at one end spaced from its horizontal axis a guide roll located above and on the axis of the cutter for guiding thereover the elongated material to the guide on the driven member below the lever means, the axis of the guide roll extending horizontally and normally lying substantially in the same horizontal plane as the horizontal axis of the lever means; and means bearing against the lever means to generally maintain the guide roll axis in said substantially same horizontal plane and to sense and measure the vertical force exerted against it due to the forces generated by the elongated material as it moves over the guide roll to the cutter and tends to cause a rotative movement of the lever means.
Claim 2
Dependent Claim
339 words
In an apparatus for cutting elongated, flexible material into predetermined shorter lengths, the apparatus including a horizontally positioned cutter having knives spaced at predetermined intervals around the periphery of the cutter with their edges positioned in vertical planes and facing radially outwardly of the cutter, a driven member movable in a path around the cutter and having a guide mounted thereon for movement therewith for engaging and guiding the elongated material onto and around the cutter for wrapping the material therearound against the knife edges, and wherein the elongated material is guided from above the apparatus to the guide on the movable driven member, the material thus defining a circular path at the location where the material engages the moving guide as the elongated material changes direction and hence generates variable horizontal and constant vertical components of force in engaging the guide at different locations of the moving guide around the cutter prior to being guided by the guide to the cutter, the invention comprising an apparatus for sensing and measuring the tension of the elongated material being wrapped around the cutter by sensing only the vertical components of force and comprising: lever means positioned above the cutter and pivotally mounted about a horizontal axis for rotative movement in a vertical plane; said lever means having at one end spaced from its horizontal axis a guide roll located above and on the axis of the cutter for guiding thereover the elongated material to the guide on the driven member below the lever means, the axis of the guide roll extending horizontally and normally lying substantially in the same horizontal plane as the horizontal axis of the lever means; and means bearing against the lever means to generally maintain the guide roll axis in said substantially same horizontal plane and to sense and measure the vertical force exerted against it due to the forces generated by the elongated material as it moves over the guide roll to the cutter and tends to cause a rotative movement of the lever means.
Claim 3
Dependent Claim
32 words
In the apparatus as defined in claim 1, and wherein said lever means comprises an arm with the guide roll mounted at one end and the horizontal axis at the opposite end.
Claim 4
Dependent Claim
35 words
In the apparatus as defined in claim 1, and wherein said lever means comprises an arm with the guide roll mounted at one end and the horizontal axis intermediate the opposite end of the arm.
Claim 5
Dependent Claim
57 words
In the apparatus as defined in claim 1, and wherein said lever means comprises a bell crank pivotally mounted at the juncture of its two arms with the guide roll mounted at the end of one arm and the other arm bearing against the means which generally maintains the guide roll axis in said same horizontal plane.
Claim 6
Dependent Claim
52 words
In the apparatus as defined in claim 1, and wherein said means bearing against the lever means to generally maintain the guide roll axis in substantially the same horizontal plane with the pivotal axis of the lever mEans includes a transducer for converting movement of the lever means into an electrical signal.
References Cited (Backward Citations)
US3557648A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |