Patent US3819948A successfully refreshed from Google Patents.
US3819948A
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US
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Method and apparatus for controlling the quantity of oil coated on continuously moving material
Assignee: NIPPON KAKAN KK
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Filing: 1973-03-15
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Granted: 1974-06-25
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Expires: 1993-03-15
Abstract
Abstract A pair of optical systems are provided along the path of travel of the material at positions before and after oiling. Each optical system comprises a polarized light projector and a receiver for receiving the polarized light reflected from the oil film coated on the material. By comparing the outputs of two receivers, the thickness of the oil film can be determined. To automatically control the quantity of the oil to be coated on the material, the difference between the outputs of the two receivers at different or the same azimuth angles of the optical axes of the two receivers is detected and this difference is used to control the operating condition of an electrostatic oiling device.
Inventors
- 👤 H Lijima
- 👤 T Shimoma
- 👤 T Miyachi
- 👤 K Inamoto
- 👤 S Fukuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:55
CPC Classifications
F; F16; F16N; F16N29/00; F16N29/02
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
143 words
A method of continuously controlling the quantity of oil coated on a continuously moving material comprising the steps of: projecting respective polarized lights by means of a pair of polarized light optical systems on the surface of said material at discrete positions before and after oiling; receiving the polarized lights reflected from the surface of said material by means of respective polarized light receivers at said discrete positions; varying the azimuth angles of the optical axes of said respective polarized light receivers; continuously detecting the variations in the quantities of the lights received at corresponding azimuth angles before and after oiling; comparing the detected variations to produce a difference signal; and continuously controlling the operating condition of an oiling device for said material as a function of said difference signal so as to apply a predetermined quantity of the oil onto said material.
Claim 2
Independent Claim
143 words
A method of continuously controlling the quantity of oil coated on a continuously moving material comprising the steps of: projecting respective polarized lights by means of a pair of polarized light optical systems on the surface of said material at discrete positions before and after oiling; receiving the polarized lights reflected from the surface of said material by means of respective polarized light receivers at said discrete positions; varying the azimuth angles of the optical axes of said respective polarized light receivers; continuously detecting the variations in the quantities of the lights received at corresponding azimuth angles before and after oiling; comparing the detected variations to produce a difference signal; and continuously controlling the operating condition of an oiling device for said material as a function of said difference signal so as to apply a predetermined quantity of the oil onto said material.
Claim 3
Dependent Claim
70 words
The method according to claim 1 wherein the azimuth angles of the optical axes of said two polarized light receivers which correspond to minimum quantities of the lights received before and after oiling are detected, said detected azimuth angles are compared and a difference signal corresponding to the difference between said detected azimuth angles is produced, said difference signal being used in said controlling step to control said oiling device.
Claim 4
Dependent Claim
75 words
The method according to claim 1 wherein the azimuth angles of the optical axes of said two polarized light receivers at which the quantities of the lights received before and after oiling coincide with a predetermined reference value are detected, said detected azimuth angles are compared and a difference signal corresponding to the difference between said detected azimuth angles is produced, said difference signal being used in said controlling step to control said oiling device.
Claim 5
Dependent Claim
64 words
The method according to claim 1 wherein the azimuth angles of the optical axes of said two polarized light receivers are made equal with each other, corresponding quantities of the lights received before and after oiling are detected, and the detected light quantities are compared to produce a difference signal, said difference signal being utilized in said controlling step to control said oiling device.
Claim 6
Independent Claim
81 words
The method according to clain 2 wherein either one of the polarizing elements of the two polarized light receivers is rotated such that the corresponding quantities of the lights received before and after oiling are always made minimum while the other element is held fixed, and the angle of rotation of rotated element is measured and compared with the fixed azimuth angle of said other element to produce said difference signal, said difference signal being utilized to control said oiling device.
Claim 7
Independent Claim
81 words
The method according to clain 2 wherein either one of the polarizing elements of the two polarized light receivers is rotated such that the corresponding quantities of the lights received before and after oiling are always made minimum while the other element is held fixed, and the angle of rotation of rotated element is measured and compared with the fixed azimuth angle of said other element to produce said difference signal, said difference signal being utilized to control said oiling device.
Claim 8
Dependent Claim
85 words
The method according to claim 3 wherein either one of the polarizing elements of the two polarized light receivers is rotated such that the corresponding quantities of the lights received before and after oiling are always equal to a predetermined quantity while the other element is held fixed, and the angle of rotation of the rotated element is detected and compared with the fixed azimuth angle of said other element to produce said difference signal, said difference signal being used to control said oiling device.
Claim 9
Dependent Claim
169 words
Apparatus for controlling an oiling device for coating oil onto continuously moving material comprising: a pair of optical systems respectively positioned along the path of said material at positions before and after oiling, each of said optical systems including a projector for projecting polarized light upon the surface of said material, a polarized light receiver for receiving the polarized light reflected from the surface of said material, means for varying the azimuth angle of the optical axis of said polarized light receiver, and means for detecting said azimuth angle of the optical system; means responsive to the outputs from said polarized light receivers for controlling said azimuth angle varying means; subtractor means for continuously deriving a difference signal corresponding to the difference between outputs from said polarized light receivers; a comparator for comprising said difference signal with a predetermined reference signal; and oil quantity control means responsive to the output from said comparator for continuously controlling the quantity of the oil coated on said material by said oiling device.
Claim 10
Dependent Claim
169 words
Apparatus for controlling an oiling device for coating oil onto continuously moving material comprising: a pair of optical systems respectively positioned along the path of said material at positions before and after oiling, each of said optical systems including a projector for projecting polarized light upon the surface of said material, a polarized light receiver for receiving the polarized light reflected from the surface of said material, means for varying the azimuth angle of the optical axis of said polarized light receiver, and means for detecting said azimuth angle of the optical system; means responsive to the outputs from said polarized light receivers for controlling said azimuth angle varying means; subtractor means for continuously deriving a difference signal corresponding to the difference between outputs from said polarized light receivers; a comparator for comprising said difference signal with a predetermined reference signal; and oil quantity control means responsive to the output from said comparator for continuously controlling the quantity of the oil coated on said material by said oiling device.
Claim 11
Dependent Claim
35 words
The apparatus according to claim 7 wherein said means responsive to the outputs from said polarized light receivers comprises means responsive to the difference in the quantities of the polarized lights received by said receivers.
Claim 12
Dependent Claim
37 words
The apparatus according to claim 7 wherein said means responsive to the outputs from said polarized light receivers comprises means responsive to the difference between the azimuth angles of the optical axes of said polarized light receivers.
Claim 13
Dependent Claim
55 words
The apparatus according to claim 7 wherein: said means for controlling said azimuth angle varying means comprises a servo-system responsive to the minimum quantities of the lights received by said respective polarized light receivers; and wherein said subtractor means comprises a subtractor which generates a difference signal corresponding to the difference between said azimuth angles.
Claim 14
Dependent Claim
76 words
The apparatus according to claim 9 wherein: said means for controlling said azimuth angle varying means comprises a servo-system including means for comparing the quantities of the polarized lights received by said Polarized light receivers respectively with the same reference value for producing a difference signal and means responsive to said difference signal for controlling said azimuth angle varying means; and wherein said subtractor means comprises a subtractor for detecting the difference between said azimuth angles.
Claim 15
Dependent Claim
86 words
The apparatus according to claim 9 wherein: said control means for said azimuth angle varying means comprises a regulator responsive to the detected azimuth angles for controlling the polarized light receivers such that the azimuth angles of the optical axes of said two light receivers are made equal to a preset angle and for fixing said azimuth angle varying means to the regulated positions; and wherein said subtractor means comprises a subtractor for detecting the difference between the quantities of the lights received by said receivers.
Claim 16
Dependent Claim
26 words
The apparatus according to claim 7 wherein said pair of optical systems are positioned above rollers for guiding said material at positions before and after oiling.
Claim 17
Dependent Claim
42 words
The apparatus according to claim 7 wherein said oiling device comprises an electrostatic oiling device and the flow quantity of atomized oil supplied to said oiling device is controlled by said oil quantity control means responsive to the output from said comparator.
Claim 18
Dependent Claim
47 words
The apparatus according to claim 7 wherein said oiling device comprises an electrostatic oiling device and the voltage impressed across the discharge electrodes of the oiling device is controlled in accordance with the output from said oil quantity control means responsive to the output from said comparator.
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |