US3866115A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickness gauge system
Assignee: Individual
•
Filing: 1973-08-28
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Granted: 1975-02-11
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Expires: 1993-08-28
Abstract
Abstract A device for monitoring the thickness of films of non-conductive material while the film or web is moving, and particularly while the film is still on the calender roll used in forming the same. The device employs a proximity electronic system. A device is mounted so as to be free to move as the thickness of the film or material passing thereunder varies. It is not necessary that the electronic probe actually contact the film. Oil, air or gasses, etc., which may lie between the probe and the surface of the film have no affect on the film.
Inventors
- 👤 David W Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:34
CPC Classifications
G; G01; G01B; G01B7/00; G01B7/02; G01B7/06; G01B7/10; G01B7/107
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
235 words
A device for the continuous monitoring of thickness of a continuously moving sheet of non-conductive material using a proximity measuring system including a proximotor and a probe, a continuously moving metallic support for said sheet material, a probe mounted directly above to said moving sheet material and supported by said material so as to be held at a constant distance from the surface of said sheet material, positioning means for said electronic probe consisting of positioning elements directly supported on the continuous moving sheet of material and mounted to move in harmony with any variation in the thickness of said sheet, said electronic probe being supported non-inductively in a mechanical housing supported by said positioning elements, said housing being freely rotatably supported on the end of a rod element, said rod element being rotatably supported on a horizontal axis parallel to the plane of movement of said sheet of material, said axis being stationarily mounted relative to said moving metallic support for said sheet of non-conductive material, said rod element being adjustably mounted relative to said horizontal axis and carrying an adjustable counterweight sufficient to reduce any pressure exerted on said continuously moving sheet by said positioning means for said probe to approximately zero, said electronic probe being so constructed and arranged as to produce an electronic signal upon any lineral movement of said electronic probe normal to said metallic support foR said sheet material.
Claim 2
Independent Claim
235 words
A device for the continuous monitoring of thickness of a continuously moving sheet of non-conductive material using a proximity measuring system including a proximotor and a probe, a continuously moving metallic support for said sheet material, a probe mounted directly above to said moving sheet material and supported by said material so as to be held at a constant distance from the surface of said sheet material, positioning means for said electronic probe consisting of positioning elements directly supported on the continuous moving sheet of material and mounted to move in harmony with any variation in the thickness of said sheet, said electronic probe being supported non-inductively in a mechanical housing supported by said positioning elements, said housing being freely rotatably supported on the end of a rod element, said rod element being rotatably supported on a horizontal axis parallel to the plane of movement of said sheet of material, said axis being stationarily mounted relative to said moving metallic support for said sheet of non-conductive material, said rod element being adjustably mounted relative to said horizontal axis and carrying an adjustable counterweight sufficient to reduce any pressure exerted on said continuously moving sheet by said positioning means for said probe to approximately zero, said electronic probe being so constructed and arranged as to produce an electronic signal upon any lineral movement of said electronic probe normal to said metallic support foR said sheet material.
Claim 3
Dependent Claim
17 words
The invention of claim 1, wherein the rod member is rotatable relative to the horizontal supporting shaft.
Claim 4
Dependent Claim
33 words
The invention of claim 1 wherein said positioning elements for the said electronic probe are a pair of wheels rotatably mounted upon shaft means parallel to the plane of the material being measured.
Claim 5
Dependent Claim
12 words
The invention of claim 1 wherein said positioning elements are pneumatic cushions.
Claim 6
Dependent Claim
16 words
The invention of claim 1 wherein the electronic probe is adjustably mounted in the mechanical housing.
Claim 7
Dependent Claim
23 words
The invention of claim 5 wherein the mechanical holder is a multi-part member which carries both the electronic probe and the positioning elements.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |