US3728518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for heat treatment of synthetic yarn
Assignee: Individual
•
Filing: 1971-09-15
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Granted: 1973-04-17
•
Expires: 1991-09-15
Abstract
Abstract In heat treatment apparatus for the treatment of synthetic yarns and the like, a plurality of heat-transfer jackets having replaceable heating plates thereon are connected to a common liquid heating chamber and a common header or condenser to form a closed heating system. The jacket and header are connected through a restricted orifice to provide a fluid-pressure resistance so that the heated liquid in the chamber when vaporized flows into the upper portion of the heating jacket, through the orifice and into the header where it condenses. The restricted orifice increases the velocity of the vapor flowing into the header preventing the condensation of the vapor at the upper portion of the jackets to thereby eliminate non-uniform temperature areas on the external surfaces of the heater plates. A pressure sensor is connected to at least one of the jackets and includes switching means to control a heating element to maintain a constant temperature and pressure.
Inventors
- 👤 N Kodaira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:43
CPC Classifications
D; D02; D02J; D02J13/00; D02J13/003
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
Heat treatment apparatus for synthetic fibrous yarn comprising: a plurality of heat exchangers; a heating chamber tube means connecting said heating chamber to each of said heat exchangers; heating surface means for receiving a yarn in heat exchange relationship to said heat exchangers; a liquid heat transfer medium in said heating chamber; a condensing chamber; pipe means connecting said condensing chamber to each of said heat exchangers conduit means connecting said condensing chamber to said heating chamber; heating means for heating said heat transfer medium in said heating chamber to cause said medium to vaporize, said vapor passing through said heat exchangers and into said condensing chamber through said pipe connecting means; and venturi means in said pipe connecting means, said venturi means increasing the velocity of said vapor passing from said heat exchanger into said condenser to thereby prevent said vapor from condensing and remaining within said heat exchanger.
Claim 2
Dependent Claim
150 words
Heat treatment apparatus for synthetic fibrous yarn comprising: a plurality of heat exchangers; a heating chamber tube means connecting said heating chamber to each of said heat exchangers; heating surface means for receiving a yarn in heat exchange relationship to said heat exchangers; a liquid heat transfer medium in said heating chamber; a condensing chamber; pipe means connecting said condensing chamber to each of said heat exchangers conduit means connecting said condensing chamber to said heating chamber; heating means for heating said heat transfer medium in said heating chamber to cause said medium to vaporize, said vapor passing through said heat exchangers and into said condensing chamber through said pipe connecting means; and venturi means in said pipe connecting means, said venturi means increasing the velocity of said vapor passing from said heat exchanger into said condenser to thereby prevent said vapor from condensing and remaining within said heat exchanger.
Claim 3
Dependent Claim
52 words
Heat treatment apparatus aS defined in claim 1 and further including means responsive to pressure changes in at least one of said heat exchangers and switch means operatively connecting said pressure responsive means to said heating means for controlling said heating means in response to changes of pressure in said heat exchanger.
Claim 4
Dependent Claim
92 words
The heat treatment apparatus as defined in claim 2 wherein said heating means is an electrical heating element, said pressure-responsive means comprising a pair of cooperable bellows elements, one of said bellows being connected to said exchanger and responsive to pressure changes therein, the other of said bellows being responsive to changes in atmospheric pressure, said switch means for controlling said heating means including electrical switch means for controlling said heating element and means connecting said bellows to said electrical switch means for switching same in response to changes in sensed pressure.
Claim 5
Dependent Claim
35 words
The heat treatment apparatus as defined in claim 1 and further including plate means removably attached to said heat exchanger, said plate means having means formed therein for guiding the yarn during the treatment thereof.
Claim 6
Dependent Claim
24 words
The heat treatment apparatus as defined in claim 4 and further including means adjustably mounting said plate means with respect to said heat exchanger.
Claim 7
Dependent Claim
163 words
Heat treatment apparatus for synthetic fibrous yarn comprising: a heating chamber; a low boiling point liquid heat transfer medium in said chamber; a heating element in said heating chamber; a vertically elongated heat exchange chamber communicating with said heating chamber for receiving said liquid after heating to the gaseous phase; heating surface means for receiving a yarn in heat exchange relationship to said heat exchange chamber; a condensing chamber; pipe means connecting the upper end of said heat exchange chamber to said condensing chamber; said pipe means having a venturi having a throat diameter in proportion to the quantity of said liquid heat transfer medium such that the acceleration of the movement of gas will prevent the high boiling point components of said gas from condensing on the walls of the upper portion of said heat exchange chamber; and conduit means connecting said condensing chamber to said heating chamber below the surface of the liquid in said latter chamber under normal working conditions.
Claim 8
Dependent Claim
163 words
Heat treatment apparatus for synthetic fibrous yarn comprising: a heating chamber; a low boiling point liquid heat transfer medium in said chamber; a heating element in said heating chamber; a vertically elongated heat exchange chamber communicating with said heating chamber for receiving said liquid after heating to the gaseous phase; heating surface means for receiving a yarn in heat exchange relationship to said heat exchange chamber; a condensing chamber; pipe means connecting the upper end of said heat exchange chamber to said condensing chamber; said pipe means having a venturi having a throat diameter in proportion to the quantity of said liquid heat transfer medium such that the acceleration of the movement of gas will prevent the high boiling point components of said gas from condensing on the walls of the upper portion of said heat exchange chamber; and conduit means connecting said condensing chamber to said heating chamber below the surface of the liquid in said latter chamber under normal working conditions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |