US3256623A - Quality control press release means - Google Patents

Quality control press release means Download PDF

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Publication number
US3256623A
US3256623A US421564A US42156464A US3256623A US 3256623 A US3256623 A US 3256623A US 421564 A US421564 A US 421564A US 42156464 A US42156464 A US 42156464A US 3256623 A US3256623 A US 3256623A
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United States
Prior art keywords
pressing
thermistor
head
buck
press
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Expired - Lifetime
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US421564A
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English (en)
Inventor
David L Radford
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
McGraw Edison Co
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McGraw Edison Co
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Filing date
Publication date
Application filed by McGraw Edison Co filed Critical McGraw Edison Co
Priority to US421564A priority Critical patent/US3256623A/en
Priority to FR66068A priority patent/FR1490617A/fr
Priority to BE682802D priority patent/BE682802A/fr
Application granted granted Critical
Publication of US3256623A publication Critical patent/US3256623A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F71/00—Apparatus for hot-pressing clothes, linen or other textile articles, i.e. wherein there is substantially no relative movement between pressing element and article while pressure is being applied to the article; Similar machines for cold-pressing clothes, linen or other textile articles
    • D06F71/32—Details
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F71/00—Apparatus for hot-pressing clothes, linen or other textile articles, i.e. wherein there is substantially no relative movement between pressing element and article while pressure is being applied to the article; Similar machines for cold-pressing clothes, linen or other textile articles
    • D06F71/32—Details
    • D06F71/34—Heating arrangements; Arrangements for supplying or removing steam or other gases

Definitions

  • This invention relates to a press with means to control its pressing time and operation, and has for an object to stop the pressing operation When the fabric being pressed reaches a pre-set temperature that indicates an absence of moisture therein.
  • the invention is characterized by means that controls the quality of the pressing operation and also insures against fabric scorching.
  • Ideal pressing temperatures of different fabric vary according to the amount of moisture contained in the fabric being pressed. This temperature is difiicult to preset if dependent on the heat of the pressing buck, head, or both. However, if the optimum pressing temperature of a fabric item is known, the same can be used to release the press when it is reached, thereby insuring uniformity of quality regardless that the moisture content of some of the items of a run thereof is different than the content of others in said run.
  • the present invention contemplates means that responds to the optimum temperature of the fabric and not of the pressing components to release the press and stop the pressing operation.
  • Either laundry or dry cleaning types of presses, presses used by clothing manufacturers, or shirt and pants pressing machines may form the basis on which the present invention may be applied.
  • Another object of the invention is to provide, in means as above characterized, means to cool a sensor device that responds to the temperature of the item being pressed to re-set the control means quickly enough for economical operation.
  • FIG. 1a is a diagrammatic view of an amplifier-relay type controller shown schematically in FIG. 1.
  • FIG. 2 is an enlarged and fragmentary sectional view showing a sensor or thermistor, as used in the invention and applied to the head of a pressing machine.
  • FIG. 3 is a similar view showing a sensor or thermistor as applied to the buck of a pressing machine.
  • FIG. 4 is a plan view of the sensor shown in FIG. 3.
  • the drawings show a pressing machine 5 provided with a fixed buck 6, a press head 7, an arm 8 mounting said head on a pivot 9 on the press frame 10, and an extensible air cylinder 11 that is so connected to said arm 8 as means that are positive in operation, convenient in use,
  • a release means that comprises an amplifier-relay type of controller that responds to changes in the electrical resistance of a thermistor that is embodied either in the head or the buck of a pressing machine in such position as to be operatively affected by the temperature of an item pressed, and means operated by said controller to automatically open the press and/or stop the pressing operation when the optimum temperature in said item is reached.
  • the spacing of the operations should rather be controlled by the time needed to dress the buck than the time required for the sensor to cool sufiiciently and re-set for the next operation. means to cause the sensor tocool with sufficient rapidity to enable desired economically satisfactory pressing operations of a succession of items.
  • FIG. 1 is a schematic view showing the present quality control means connected to and combined with a pressing machine.
  • the press head 7 is shown with a heating steam chest 7a, but may be heated in other ways common to pressing machines.
  • the above generally conventionally, inludes spring means 811 that biases the arm 8 to buck-raising position and a device 12 that controls flow of compressed air to the cylinder 11 to cause the same to extend and close the press.
  • the press includes means to release the device 12 to vent, thereby relieving pressure in the cylindcr and allowing the spring means 8a to open the press.
  • conventional means or other comparable means is used, is not material to the invention, since the device 12 and the cylinder 11 are so interrelated that the former controls the raising or lowering operations of the press head under control of a temperature-actuated means.
  • the present invention comprises, generally, a sensor or thermistor 15 mounted in the head 7 or a sensor or thermistor 16 mounted in the buck 6, and control means 17 in electric circuit between the thermistor 15 or 16 and the device 12 to cause the latter to control air flow to the cylinder 11.
  • the sensor or thermistor 15 is in the form of an elongated member that is housed in a metal holder 20 that is welded as an upper extension of the head 7.
  • the seat 21 in which the thermistor is housed is closely spaced from the pressing surface 22 of said head so as to be sensitive to the heat at said surface and, therefore, to the heat of an item 23 that is pressed between head 7 and the Nomex buck cover 24 of the resilient or padded buck 6.
  • the item 23 may comprise a variety of garments or parts thereof, the same, in this case, being wet to varying degrees as may be due to mass washing prior to pressing.
  • the item may be single or double ply. Assuming the same to be a pants leg, it would comprise two plies or lays of wet material which, when pressed, dry under pressing heat. It will be clear that oridinarily. the item is satisfactorily pressed when fully dry and will invite scorching only if the pressing time is continued beyond this point.
  • a too short pressing time may not produce a satisfactory result.
  • This invention contemplates termination of the pressing operation at a predetermined temperature at which the item is properly pressed even though the pressing time may vary.
  • the thermistor 15 comprises a temperature-sensing device that has nominal ohmage that covers a temperature range of to 375 F.
  • the range may be wider, but may be adequately covered by a thermistor having a mean or mid-point resistance of 5000 to 5600 ohms, and having a nominal differential of about 18.5 ohms or 1.1 F.
  • the thermistor 15 is incorporated in a bridge circuit 25 in balance with a reference resistance 26 of the same ohmage, said circuit being across the low voltage power output of the secondary 27 of a power transformer 28.
  • the conductors 29 (FIG. 1) connect the thermistor to a DC.
  • amplifier 30 of the control means 17 and the latter, in turn, is connected to relay 31 by conductors 32.
  • a switch 33 controlled by said relay, closes a line circuit 34 to a solenoid 35 that opens the device 12 to allow pressure to release from cylinder 11.
  • control amplifier 17 is similar to a transistorized amplifier relay marketed under the name Vera- Tran by Honeywell of Minneapolis, Minnesota.
  • the thermistor resistance decreases until it reaches a value corresponding to the optimum-temperature desired and which may be set on the calibrated knob 3511.
  • the relay 31, by way of the amplifier 30, is energized, closing the switch 33.
  • the controller amplifier will re-set automatically. This would entail delaying the release circuit so the head would stay down. Thus, if the item 23 is engaged by a heat having a temperature of 300 F., the head temperature will be lowered materially or to a point about 275 F. By setting the controller amplifier to re-set at 285 F., there will be a range sufficient for the same to set and re-set as desired. Then, when the item temperature next reaches 300 F., the device 12 will be actuated to release the press head.
  • the thermistor 16 is connected in the same way as the thermistor 15 to control amplifier 17. By placing the thermistor under the Nomex buck cover 24, the same is subject to the temperature transmitted by the item 23 being pressed and is remote from the press head 7.
  • This thermistor comprises a fiat holder 37 of Teflon or other plastic material that does not become heat-saturated as metal would. Rulon is another such plastic.
  • Said holder has a central opening 38 in which a thermistor head 39 is located and spaced from the holder.
  • Conductors 40 and 41 extend from an end of the bead 39 and are sandwiched between two fused plies of the holder, as suggested in FIG. 3. Said conductors 40 and 41 have the conductors 29 as their extensions.
  • the space or opening 38 traps the heat transmitted from the head 7, the same surrounding the bead 39 for maximum effect.
  • this trapped heated air is dissipated through the interstices of the cover 24, exposing the thermistor to hastened cooling and effecting a more rapid re-set of the amplifier after each lay of a garment.
  • Practice has demonstrated that re-set is had within ten seconds and frequently around five seconds.
  • Quality control press release means comprising, in combination with a press having pressing members comprising a buck and a press head, the latter being mounted to move between pressing engagement with the buck and under spring bias to raised position spaced from the buck:
  • (0) electrical control means energized by increase in current therein and connected and responsive to decreased resistance of the thermistor to operate the head-holding means to head-releasing condition upon the temperature of said item being increased to a predetermined level, thereby enabling the head to open under said spring bias.
  • Quality control press release means according to claim 1 in which the control means embodies ohmageadjusting means to cause said means to energize in a temperature range of the item being pressed of to 375 F.
  • Quality control press release means according to claim 1 in which the thermistor is embodied in the press head with an end thereof closely spaced from the pressing surface of said head.
  • Quality control press release means in which the buck is formed as a padded body with a fabric cover, and the thermistor is incorporated in said body immediately beneath said cover.
  • Quality control press release means according to claim 1 in which means is provided to cool the thermistor after the head is raised to non-pressing position to cause rapid raising of the resistance in the thermistor.
  • the device having an air exhaust that opens to vent the device and the air cylinder, the mentioned spring bias being operative to contract the vented cylinder and cause the press head to open, and
  • (d) means to conduct air from said exhaust to contact, and, thereby cool the thermistor when the head is opened.
  • said thermistor being responsive to increase of temperature of an item pressed between said members to vary its electrical resistance
  • (0) means responsive to such change in resistance of the thermistor to separate the pressing members when the temperature level of said item is in the range of 150 to 375 F.
  • thermoistor being responsive to increase of temperature of an item pressed between said members to vary its electrical resistance
  • (c) means responsive to such change in resistance of the thermistor to separate the pressing members when the temperature level of said item is in the range of 150 to 375 F.
  • (d) means to cool the thermistor after the pressing members have been separated to cause lowering of 1,939,043 12/1933 Davis 38-15 the resistance of the thermistor preparatory to the 2,296,910 9/1942 Davis 3815 next pressing operation. 3,042,837 7/1962 Alley et a1 3822 X' References Cited y the Examiner 5 JORDAN FRANKLIN, Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
US421564A 1964-12-28 1964-12-28 Quality control press release means Expired - Lifetime US3256623A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US421564A US3256623A (en) 1964-12-28 1964-12-28 Quality control press release means
FR66068A FR1490617A (fr) 1964-12-28 1966-06-20 Dispositif de déclenchement d'une presse pour le pressage de vêtements
BE682802D BE682802A (fr) 1964-12-28 1966-06-20 Dispositif de déclenchement d'une presse pour le pressage de vêtements

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US421564A US3256623A (en) 1964-12-28 1964-12-28 Quality control press release means
FR66068A FR1490617A (fr) 1964-12-28 1966-06-20 Dispositif de déclenchement d'une presse pour le pressage de vêtements

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US3256623A true US3256623A (en) 1966-06-21

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Application Number Title Priority Date Filing Date
US421564A Expired - Lifetime US3256623A (en) 1964-12-28 1964-12-28 Quality control press release means

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US (1) US3256623A (fr)
BE (1) BE682802A (fr)
FR (1) FR1490617A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464130A (en) * 1967-02-17 1969-09-02 New York Pressing Machinery Co Pressing apparatus
US3505743A (en) * 1968-08-13 1970-04-14 Mc Graw Edison Co Fabric finishing machine and automatic control for operating same
JPS4874989U (fr) * 1971-12-20 1973-09-18

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1781482A (en) * 1927-03-31 1930-11-11 H O Swoboda Inc Ironing machine
US1939043A (en) * 1929-06-08 1933-12-12 Prosperity Co Inc Laundry pressing and drying machine
US2296910A (en) * 1941-07-05 1942-09-29 Prosperity Co Inc Humidity control for pressing machines
US3042837A (en) * 1958-11-17 1962-07-03 Gen Electric Fail safe overload protective system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1781482A (en) * 1927-03-31 1930-11-11 H O Swoboda Inc Ironing machine
US1939043A (en) * 1929-06-08 1933-12-12 Prosperity Co Inc Laundry pressing and drying machine
US2296910A (en) * 1941-07-05 1942-09-29 Prosperity Co Inc Humidity control for pressing machines
US3042837A (en) * 1958-11-17 1962-07-03 Gen Electric Fail safe overload protective system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3464130A (en) * 1967-02-17 1969-09-02 New York Pressing Machinery Co Pressing apparatus
US3505743A (en) * 1968-08-13 1970-04-14 Mc Graw Edison Co Fabric finishing machine and automatic control for operating same
JPS4874989U (fr) * 1971-12-20 1973-09-18

Also Published As

Publication number Publication date
BE682802A (fr) 1966-12-01
FR1490617A (fr) 1967-08-04

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