US3758968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the operating temperature of a continuous flat press
Assignee: Individual
•
Filing: 1972-04-24
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Granted: 1973-09-18
•
Expires: 1992-04-24
Abstract
Abstract A method of pressing a fabric in a press at a given temperature. The temperature at which a fabric is pressed is set by developing a voltage corresponding to and representative of a desired or given temperature. A second voltage is developed and varied in response to a signal developed by sensing the press plate temperature and developing from the two first-mentioned voltage signals an integrated reference voltage signal that seeks to approximate the voltage representative of the desired temperature for pressing. This reference voltage is compared with another voltage developed by sensing the varying temperature of steam within a pressing plate of the press by which the pressing of the fabric is to be effected.
Inventors
- 👤 Y Uematsu
- 👤 U Abe
- 👤 K Ishizawa
- 👤 Y Nagata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:47
CPC Classifications
D; D06; D06C; D06C15/00; D06C15/10; D06C2700/00; D06C2700/17
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
236 words
In a press for pressing a fabric by a continuous flat press provided with a plurality of pressing plates, a control method for controlling the temperature of said pressing plates being heated by supplying steam into conduit means formed therein by controlling supply of steam, comprising: a. developing a first signal representative of a desired temperature of pressing plates of a press at which a fabric is to be pressed; b. developing in conjunction with the temperature of supply steam to said pressing plate a second signal corresponding to said desired plate-temperature, said second signal corresponding to a set point; c. sensing the temperature of said supply steam and developing a third signal varying with variations of the temperature of said steam and representative of the temperature of said steam; d. comparing said signal with said second signal and developing therefrom a control signal for controlling flow of supply steam to said pressing plates to maintain said pressing plates at a temperature for effecting said pressing of said fabric at said desired temperature; e. directly on-off controlling said supply steam flow under control of said control signal to maintain said desired temperature; f. while sensing the temperature of said pressiNg plates developing a fourth signal representative of the temperature of said pressing plates, comparing said fourth signal with said first signal, and adjusting said set point in accordance with a result of said comparison as necessary.
Claim 2
Dependent Claim
236 words
In a press for pressing a fabric by a continuous flat press provided with a plurality of pressing plates, a control method for controlling the temperature of said pressing plates being heated by supplying steam into conduit means formed therein by controlling supply of steam, comprising: a. developing a first signal representative of a desired temperature of pressing plates of a press at which a fabric is to be pressed; b. developing in conjunction with the temperature of supply steam to said pressing plate a second signal corresponding to said desired plate-temperature, said second signal corresponding to a set point; c. sensing the temperature of said supply steam and developing a third signal varying with variations of the temperature of said steam and representative of the temperature of said steam; d. comparing said signal with said second signal and developing therefrom a control signal for controlling flow of supply steam to said pressing plates to maintain said pressing plates at a temperature for effecting said pressing of said fabric at said desired temperature; e. directly on-off controlling said supply steam flow under control of said control signal to maintain said desired temperature; f. while sensing the temperature of said pressiNg plates developing a fourth signal representative of the temperature of said pressing plates, comparing said fourth signal with said first signal, and adjusting said set point in accordance with a result of said comparison as necessary.
Claim 3
Dependent Claim
33 words
A control method for controlling the temperature of pressing plates of a continuous flat press according to claim 1, further comprising buffering pressure of said supply steam before supply to said pressing plates.
Claim 4
Dependent Claim
25 words
A control method for controlling temperature of pressing plates of a continuous flat press according to claim 1, wherein all steps are carried out automatically.
Claim 5
Independent Claim
163 words
A method of pressing a fabric comprising, developing a voltage signal representative of a desired temperature at which a fabric is to be pressed, sensing the temperature of a press plate for pressing the fabric and developing a signal representative of the temperature of the plate, developing in conjunction with said desired temperature signal and the signal representative of the plate temperature a reference electrical signal, sensing the temperature of steam in the press and developing an electrical signal varying with variations of the temperature of said steam and representative of the temperature of the steam, comparing the reference electrical signal and the electrical signal representative of the temperature of the steam and developing therefrom a control signal for controlling flow of steam to said plate to maintain the press plate at a temperature for effecting said pressing of said fabric at said desired temperature, and directly on-off controlling said steam flow under control of said control signal to maintain said desired temperature.
Claim 6
Independent Claim
163 words
A method of pressing a fabric comprising, developing a voltage signal representative of a desired temperature at which a fabric is to be pressed, sensing the temperature of a press plate for pressing the fabric and developing a signal representative of the temperature of the plate, developing in conjunction with said desired temperature signal and the signal representative of the plate temperature a reference electrical signal, sensing the temperature of steam in the press and developing an electrical signal varying with variations of the temperature of said steam and representative of the temperature of the steam, comparing the reference electrical signal and the electrical signal representative of the temperature of the steam and developing therefrom a control signal for controlling flow of steam to said plate to maintain the press plate at a temperature for effecting said pressing of said fabric at said desired temperature, and directly on-off controlling said steam flow under control of said control signal to maintain said desired temperature.
Claim 7
Dependent Claim
28 words
A method of pressing a fabric according to claim 4, including counteracting a temperature rise at the press plate due to restriction of the flow of steam thereinto.
Claim 8
Dependent Claim
33 words
A method of pressing a fabric according to claim 5, including counteracting variations of temperature and pressure of said steam by buffering temperature and pressure variations during ''''on'''' periods of said steam flow.
Claim 9
Dependent Claim
30 words
A method of pressing a fabric according to claim 4, in which the steam flow and temperature thereof in said press plate are maintained substantially equalized in each ''''on'''' period.
Claim 10
Dependent Claim
187 words
In combination, a flat press for pressing a fabric at a desired temperature having cooperative pressing plates provided with steam conduits disposed therein, a steam supply source, a control valve connecting each of said steam conduits to said steam supply source, an on-off system for supplying and controlling a supply of steam to said pressing plates and the temperature of the pressing plates, comprising: means for actuating said control valve; means for developing a first signal representative of the temperature of supply steam supplied to said pressing plates; means for developing a second signal representative of temperature of said pressing plate; means for on-off controlling said actuating means; comparison means for comparison of said second signal with a predetermined signal corresponding to said desired temperature of said pressing plate; means developing said predetermined signal; means for adjusting a set point of said on-off control means in accordance with an output of said comparison means; and means in said control means developing an output signal thereof to operate said actuating means in accordance with a difference signal obtained by comparison of said first signal with said set point.
Claim 11
Dependent Claim
187 words
In combination, a flat press for pressing a fabric at a desired temperature having cooperative pressing plates provided with steam conduits disposed therein, a steam supply source, a control valve connecting each of said steam conduits to said steam supply source, an on-off system for supplying and controlling a supply of steam to said pressing plates and the temperature of the pressing plates, comprising: means for actuating said control valve; means for developing a first signal representative of the temperature of supply steam supplied to said pressing plates; means for developing a second signal representative of temperature of said pressing plate; means for on-off controlling said actuating means; comparison means for comparison of said second signal with a predetermined signal corresponding to said desired temperature of said pressing plate; means developing said predetermined signal; means for adjusting a set point of said on-off control means in accordance with an output of said comparison means; and means in said control means developing an output signal thereof to operate said actuating means in accordance with a difference signal obtained by comparison of said first signal with said set point.
Claim 12
Dependent Claim
17 words
The combination according to claim 8, wherein said means for developing a first signal is a thermo-couple.
Claim 13
Dependent Claim
23 words
The combination according to claim 8, wherein said means for developing a first signal comprises a resistance thermometer bulb and a resistance-voltage transducer.
Claim 14
Dependent Claim
17 words
The combination according to claim 8, wherein said means for developing a second signal is a thermo-couple.
Claim 15
Dependent Claim
23 words
The combination according to claim 8, wherein said means for developing a second signal comprises a resistance thermomEter bulb and a resistance-voltage transducer.
Claim 16
Dependent Claim
48 words
The combination according to claim 8, wherein said comparison means comprises an automatic balancing recorder having a movable brush, a first potentiometer provided with a brush connected to a brush of said recorder, and a second potentiometer applied a voltage equal to a voltage of said first potentiometer.
Claim 17
Dependent Claim
13 words
The combination according to claim 8, wherein said adjusting means is an integrator.
Claim 18
Dependent Claim
70 words
The combination according to claim 8, wherein said on-off controlling means comprises an electric circuit for comparing said first signal with an output of said adjusting means, an amplifier for amplifying an output of said electric circuit, a logic circuit to measure a plus or minus value of an output of said amplifier and developing an output therefrom, an on-off signal generator actuated by the output of said logic circuit.
Claim 19
Dependent Claim
204 words
In combination, a press for pressing a fabric having pressing plates; steam supply means to supply steam to said pressing plates to maintain them at a desired temperature; means to develop an electrical signal representative of a desired temperature at which said pressing plates are to be maintained; means including transducer means sensing the temperature of the steam supplied at said pressing plates developing automatically an electrical signal corresponding to the temperature of said steam supplied at said pressing plates; means including transducer means sensing the temperature of a pressing plate developing automatically a varying electrical signal corresponding to and representative of the temperature of said pressing plate; a control system having means receptive of said signal corresponding to said temperature of said steam at said pressing plate, means receptive of said varying signal including said means to develop said signal representative of said desired temperature including means developing a control signal controlling ''''on'''' and ''''off'''' periods of said steam supplied to said pressing plates to maintain said pressing plates at said desired temperature, and means responding to said control signal controlling supply of said steam from said supply source to said pressing plates for periods maintaining said desired temperature of said pressing plates.
Claim 20
Dependent Claim
204 words
In combination, a press for pressing a fabric having pressing plates; steam supply means to supply steam to said pressing plates to maintain them at a desired temperature; means to develop an electrical signal representative of a desired temperature at which said pressing plates are to be maintained; means including transducer means sensing the temperature of the steam supplied at said pressing plates developing automatically an electrical signal corresponding to the temperature of said steam supplied at said pressing plates; means including transducer means sensing the temperature of a pressing plate developing automatically a varying electrical signal corresponding to and representative of the temperature of said pressing plate; a control system having means receptive of said signal corresponding to said temperature of said steam at said pressing plate, means receptive of said varying signal including said means to develop said signal representative of said desired temperature including means developing a control signal controlling ''''on'''' and ''''off'''' periods of said steam supplied to said pressing plates to maintain said pressing plates at said desired temperature, and means responding to said control signal controlling supply of said steam from said supply source to said pressing plates for periods maintaining said desired temperature of said pressing plates.
Claim 21
Dependent Claim
152 words
In a process for pressing a fabric by a continuous flat press provided with a plurality of pressing plates, an automatic control method for controlling the temperature of each of said pressing plates being heated by supplying steam into conduit means formed therein, comprising firstly selecting a reference temperature based upon the characteristics of the fabric to be pressed, setting said reference temperature in said conduit means as a reference input corresponding to the desired temperature of said pressing plate, detecting the temperature of steam in said conduit means directly, on-off controlling of said steam supply into said conduit means in accordance with a signal resulting from a comparison between said reference input and said detected temperature, measuring the temperature of said flat press directly, comparing said temperature of said flat press with said desired temperature of said flat press and adjusting said input in accordance with the result of said comparison.
Claim 22
Dependent Claim
152 words
In a process for pressing a fabric by a continuous flat press provided with a plurality of pressing plates, an automatic control method for controlling the temperature of each of said pressing plates being heated by supplying steam into conduit means formed therein, comprising firstly selecting a reference temperature based upon the characteristics of the fabric to be pressed, setting said reference temperature in said conduit means as a reference input corresponding to the desired temperature of said pressing plate, detecting the temperature of steam in said conduit means directly, on-off controlling of said steam supply into said conduit means in accordance with a signal resulting from a comparison between said reference input and said detected temperature, measuring the temperature of said flat press directly, comparing said temperature of said flat press with said desired temperature of said flat press and adjusting said input in accordance with the result of said comparison.
Claim 23
Dependent Claim
35 words
An automatic control method for controlling temperature of pressing plates of a continuous flat press according to claim 17, further comprising buffering the pressure of said supply steam before supplying steam into said conduit means.
Claim 24
Dependent Claim
25 words
An automatic control method for controlling temperature of pressing plates of a continuous flat press according to claim 17, including carrying out all operations automatically.
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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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |