Patent US3683682A successfully refreshed from Google Patents.
US3683682A
Expired / Lapsed
US
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Method of and an apparatus for determining the bond strength between the metallic sheath and the non-metallic jacket of a cable
Assignee: International Standard Electric Corp
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Filing: 1970-07-24
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Granted: 1972-08-15
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Expires: 1990-07-24
Abstract
Abstract The bond strength with which the aluminum sheath adheres to the polyethylene jacket of a cable is determined by measuring the force required to peel off the sheath from the jacket. The bond strength so measured provides an indication of the effectiveness of the bond as a moisture and vapor barrier. A simple measuring apparatus is clamped in a tensile strength testing machine to obtain a reading of the measured strength. The test piece is mounted in a rotatable collet having a split mandrel which clamps the aluminum sheath and peels it from the plastic. The torque on the mandrel is measured on the machine.
Inventors
- 👤 Leonhard Jochmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:43
CPC Classifications
G; G01; G01N; G01N19/00; G01N19/04; G01N2203/00; G01N2203/0058; G01N2203/0091
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
176 words
An apparatus for measuring the bond strength of a metallic sheath bonded onto a non-metallic jacket of an electrical cable, said sheath having two longitudinal edges forming a seam, comprising: a base frame; a first and a second support means mounted on said base frame; a first axle freely and rotatably mounted on said first support means; means coupled to said first axle for holding a tubular portion of said sheath and jacket; a second axle freely and rotatably mounted on said second support means, said second axle being offset from and aligned in parallel with said first axle; a slitted mandrel coupled to said second axle and aligned with the axis thereof and facing said holding means, said slitted mandrel clamping one of said two edges of said sheath forming said seam; means for applying a torque to said second axle for enabling said mandrel to peel off said sheath from said jacket; and means for measuring the torque required to rotate said second axle and the bond strength between said sheath and said jacket.
Claim 2
Independent Claim
176 words
An apparatus for measuring the bond strength of a metallic sheath bonded onto a non-metallic jacket of an electrical cable, said sheath having two longitudinal edges forming a seam, comprising: a base frame; a first and a second support means mounted on said base frame; a first axle freely and rotatably mounted on said first support means; means coupled to said first axle for holding a tubular portion of said sheath and jacket; a second axle freely and rotatably mounted on said second support means, said second axle being offset from and aligned in parallel with said first axle; a slitted mandrel coupled to said second axle and aligned with the axis thereof and facing said holding means, said slitted mandrel clamping one of said two edges of said sheath forming said seam; means for applying a torque to said second axle for enabling said mandrel to peel off said sheath from said jacket; and means for measuring the torque required to rotate said second axle and the bond strength between said sheath and said jacket.
Claim 3
Dependent Claim
45 words
The apparatus in accordance with claim 1, wherein said means applying a torque includes cord means, one end of which is attached to and wrapped about said second axle, means for pulling the other end of said cord means to apply torque to said mandrel.
Claim 4
Dependent Claim
28 words
The apparatus in accordance with claim 2 further including recording means coupled to said measuring means for recording said torque with respect to the circumference of said sheath.
Claim 5
Independent Claim
143 words
An apparatus for measuring the bond strength of a metallic tubular layer bonded onto a tubular insulation layer comprising: support means; a mandrel rotatably mounted on one side of said support means; means for holding a selected portion of said metallic tubular layer bonded onto said tubular insulation layer, said holding means being rotatably mounted on the other side of said support means, the axis of said holding means being parallel to and offset from the axis of said mandrel with an end of said mandrel extending over a portion of said holding means; means for securing one of said layers to said mandrel for rotation with respect to the other layer; means for applying a torque to said mandrel to peel said one layer from said other layer; and means for measuring said torque and the corresponding bond strength between said layers.
Claim 6
Independent Claim
143 words
An apparatus for measuring the bond strength of a metallic tubular layer bonded onto a tubular insulation layer comprising: support means; a mandrel rotatably mounted on one side of said support means; means for holding a selected portion of said metallic tubular layer bonded onto said tubular insulation layer, said holding means being rotatably mounted on the other side of said support means, the axis of said holding means being parallel to and offset from the axis of said mandrel with an end of said mandrel extending over a portion of said holding means; means for securing one of said layers to said mandrel for rotation with respect to the other layer; means for applying a torque to said mandrel to peel said one layer from said other layer; and means for measuring said torque and the corresponding bond strength between said layers.
References Cited (Backward Citations)
US3019644A
Cited
US3524345A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |