US3597113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and device for the automatic continuous injection of an adjuvant into a fluid
Assignee: Rhodiaceta SA
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Filing: 1969-01-23
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Granted: 1971-08-03
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Expires: 1989-01-23
Abstract
Abstract A process of and a device for the automatic continuous injection of an adjuvant into a fluid in which the adjuvant is injected into the fluid by means of a plurality of syringes of which at any one time at least one is feeding adjuvant to the fluid, the individual syringes being operated in alternating filling and discharge phases, and the pressure in each syringe at the end of the filling phase and before the discharge phase begins being equal to or greater than the pressure existing in the zone occupied by the said fluid. In the device a motor is provided for reciprocating the syringe pistons and a commutation device is provided for communicating each syringe orifice in turn and alternately to the fluid and to a source of adjuvant.
Inventors
- 👤 Georges Dumoulin
- 👤 Lucien Manjot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:26
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/001; B; B01; B01F; B01F35/00; B01F35/80; B01F35/88; B01F35/882; B01J; B01J4/00; B01J4/008; F; F04; F04B; F04B1/00; F04B1/02; F04B7/00; F04B7/02; F04B7/0233; F04B7/0241; F04B9/00; F04B9/02; B01F2101/00; B01F2101/2805
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
102 words
A process for the accurately controlled continuous injection of minor amounts of an adjuvant into a stream of a fiber-forming high polymer spinning composition, which comprises injecting the adjuvant into the said stream by means of a plurality of syringes, causing at any one time at least one of said syringes to feed adjuvant to the stream, operating the individual syringes in alternating filling and discharge phases, and establishing in each syringe at the end of the filling phase and before the discharge phase begins a pressure at least equal to the pressure existing in the zone occupied by the said stream.
Claim 2
Dependent Claim
102 words
A process for the accurately controlled continuous injection of minor amounts of an adjuvant into a stream of a fiber-forming high polymer spinning composition, which comprises injecting the adjuvant into the said stream by means of a plurality of syringes, causing at any one time at least one of said syringes to feed adjuvant to the stream, operating the individual syringes in alternating filling and discharge phases, and establishing in each syringe at the end of the filling phase and before the discharge phase begins a pressure at least equal to the pressure existing in the zone occupied by the said stream.
Claim 3
Dependent Claim
13 words
Process according to claim 1 wherein the discharge phases of two syringes overlap.
Claim 4
Dependent Claim
25 words
Process according to claim 1 wherein the said pressure in a syringe before injection therefrom begins is generated by a downward movement of the piston.
Claim 5
Dependent Claim
24 words
Process according to claim 3, wherein two syringes are used, with filling phases shorter than their discharge phases, and the two discharge phases overlap.
Claim 6
Dependent Claim
24 words
Process according to claim 4, wherein two syringes are used, with filling phases shorter than their discharge phases, and the two discharge phases overlap.
Claim 7
Dependent Claim
25 words
Process according to claim 1, wherein the said pressure in a syringe before injection therefrom beings is generated by means of a compressed inert fluid.
Claim 8
Dependent Claim
23 words
Process according to claim 1, wherein two syringes are used, and their filling phase lasts for a shorter time than their discharge phase.
Claim 9
Dependent Claim
18 words
Process according to claim 1, wherein a suspension of a matting agent is injected into the said stream.
Claim 10
Independent Claim
144 words
A device for the accurately controlled continuous injection of minor amounts of an adjuvant into a stream of a high fiber-forming polymer spinning composition, which comprises a passageway adapted for continuous passage of aid stream, a plurality of syringes, motor means whereby the pistons of the syringes can be reciprocated, a commutation device whereby the orifice of each syringe can be connected alternately to the said passageway and to a source of the adjuvant, means for establishing in each syringe a pressure at least equal to that in the said passageway, and control means whereby the reciprocation of the pistons, and the operation of the said connecting means and pressure-establishing means are so correlated that at any one time at least one syringe is discharging adjuvant into the said passageway, and that before such discharge beings the said pressure is established in that syringe.
Claim 11
Independent Claim
144 words
A device for the accurately controlled continuous injection of minor amounts of an adjuvant into a stream of a high fiber-forming polymer spinning composition, which comprises a passageway adapted for continuous passage of aid stream, a plurality of syringes, motor means whereby the pistons of the syringes can be reciprocated, a commutation device whereby the orifice of each syringe can be connected alternately to the said passageway and to a source of the adjuvant, means for establishing in each syringe a pressure at least equal to that in the said passageway, and control means whereby the reciprocation of the pistons, and the operation of the said connecting means and pressure-establishing means are so correlated that at any one time at least one syringe is discharging adjuvant into the said passageway, and that before such discharge beings the said pressure is established in that syringe.
Claim 12
Dependent Claim
34 words
A device according to claim 9, wherein the control means is adapted to cause the desired pressure to be established in a particular syringe after the filling stroke of its piston has been completed.
Claim 13
Dependent Claim
57 words
A device according to claim 10, wherein the control means is adapted to cause the discharge stroke of the piston to begin before the commutation device opens a connection between the syringe and the chamber, the said connection being opened only when the pressure in the syringe is at least as high as that in the chamber.
Claim 14
Dependent Claim
110 words
A device according to claim 11, wherein the piston of each syringe is controlled by a two-speed motor, with the higher speed being used in the filling phase, and the control device comprises at least one constant pressure device arranged in the system between the syringe and the source of adjuvant and connected to a relay controlling the commutation device and the reversal of the stroke of the piston, a device for triggering the discharge phase of a piston as a function of a position close to the end of the discharge stroke of another piston, and a device for stopping the piston at the end of the filling stroke.
Claim 15
Dependent Claim
110 words
A device according to claim 12, wherein the piston of each syringe is controlled by a two-speed motor, with the higher speed being used in the filling phase, and the control device comprises at least one constant pressure device arranged in the system between the syringe and the source of adjuvant and connected to a relay controlling the commutation device and the reversal of the stroke of the piston, a device for triggering the discharge phase of a piston as a function of a position close to the end of the discharge stroke of another piston, and a device for stopping the piston at the end of the filling stroke.
Claim 16
Dependent Claim
41 words
A device according to claim 9, which comprises as a means of generating the required pressure a source of inert fluid under pressure, and means for transmitting the pressure thereof to the interior of a syringe before it beings to inject.
Claim 17
Dependent Claim
110 words
A device according to claim 9, wherein the piston of each syringe is controlled by a two-speed motor, with the higher speed being used in the filling phase, and the control device coMprises at least one constant pressure device arranged in the system between the syringe and the source of adjuvant and connected to a relay controlling the commutation device and the reversal of the stroke of the piston, a device for triggering the discharge phase of a piston as a function of a position close to the end of the discharge stroke of another piston, and a device for stopping the piston at the end of the filling stroke.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |