Patent US3941897A successfully refreshed from Google Patents.
US3941897A
Expired / Lapsed
US
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Process for continuous paraffining of yarns
Assignee: Rimar SpA
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Filing: 1975-03-25
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Granted: 1976-03-02
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Expires: 1995-03-25
Abstract
Abstract A process for the continuous paraffining of yarns in which the yarns are drawn under tension over the top of a rotating cylinder that has been coated with a layer of solidified paraffin. The cylinder then rotates back through a bath of molten paraffin to replace the paraffin removed by the yarns, the outer surface of the cylinder being cooled to a degree sufficient to solidify the paraffin before it contacts the yarns.
Inventors
- 👤 Gino Dalla Vecchia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:22
CPC Classifications
D; D06; D06B; D06B1/00; D06B1/10; D06B1/14; D06B1/141; D06B15/00; D06B15/08; D06B15/085
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
A process for the continuous paraffining of yarns which comprises maintaining a bath for molten paraffin, rotating a cylinder mounted on a horizontal axis in a position above the bath to cause a bottom portion of the circumference of the cylinder to be submerged into said bath so that a molten layer of paraffin is deposited on the cylinders' circumference, cooling the circumference of the cylinder sufficient to solidify the molten paraffin layer before said portion of the circumference reaches the top of its rotational path, drawing the yarns under tension over a short arc of the top of the cylinder and in frictional contact with the solidified paraffin layer on the rotating cylinder whereby the yarns are rubbed with a coating of paraffin and the paraffin removed from the cylinder by said rubbing is replaced as the cylinder rotates back through the molten bath.
Claim 2
Dependent Claim
145 words
A process for the continuous paraffining of yarns which comprises maintaining a bath for molten paraffin, rotating a cylinder mounted on a horizontal axis in a position above the bath to cause a bottom portion of the circumference of the cylinder to be submerged into said bath so that a molten layer of paraffin is deposited on the cylinders' circumference, cooling the circumference of the cylinder sufficient to solidify the molten paraffin layer before said portion of the circumference reaches the top of its rotational path, drawing the yarns under tension over a short arc of the top of the cylinder and in frictional contact with the solidified paraffin layer on the rotating cylinder whereby the yarns are rubbed with a coating of paraffin and the paraffin removed from the cylinder by said rubbing is replaced as the cylinder rotates back through the molten bath.
Claim 3
Dependent Claim
24 words
The process of claim 1, wherein the yarns are fed over the cylinder at a speed greater than the rotational speed of the cylinder.
Claim 4
Dependent Claim
20 words
The process of claim 2 wherein the cylinder rotates in the same direction as the direction of travel of yarn.
Claim 5
Dependent Claim
21 words
The process of claim 2 wherein the cylinder rotates in the opposite direction from the direction of travel of the yarns.
Claim 6
Dependent Claim
34 words
The process of claim 1, including leveling the height of the solidified paraffin above the outer surface of the cylinder to a predetermined thickness before the paraffin layer comes in contact with the yarns.
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) | 1979-03-02 | 1979-09-01 | 1980-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-02 | 1983-09-01 | 1984-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-02 | 1987-09-01 | 1988-03-02 | $7700.00 | Window Closed / Lapsed |