US3560710A - Electrically heated hot-air dispenser - Google Patents

Electrically heated hot-air dispenser Download PDF

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Publication number
US3560710A
US3560710A US698763A US3560710DA US3560710A US 3560710 A US3560710 A US 3560710A US 698763 A US698763 A US 698763A US 3560710D A US3560710D A US 3560710DA US 3560710 A US3560710 A US 3560710A
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United States
Prior art keywords
handle
air
tube
hot
clearance
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US698763A
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English (en)
Inventor
Walter Fuellemann
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Individual
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/012—Soldering with the use of hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0423—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between hand-held air guns
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. a thermistor
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux

Definitions

  • the invention has for its object the provision of an electric hot-air producing apparatus, in particular for welding thermoplastic material, wherein the handle incorporates an electric control device, around which the supplied compressed air flows and which is fitted with a potentiometer enabling the heating capacity to be continuously regulated; the hot-air generator incorporates a resistive heating element and is built onto the handle of the apparatus, the air being led through a plurality of hollow-cylindrical ducts surrounding the heating elements in the form of jackets, by syphonlike action.
  • a thermostat controlling the heating current circuit is built into the return duct at a constricted cross section.
  • FIG. I shows a partial longitudinal section of the hot-air jet apparatus
  • FIG. 2 shows a sectional view of the front part of the apparatus on a larger scale
  • FIG. 3 is a sectional view taken on the line III-III of FIG. 2;
  • FIG. 4 represents the wiring diagram of the electronic control device fitted in the apparatus.
  • the electric hot-air jet apparatus shown includes a handle 1 onto the rear end of which a compressed-air tubing'Z is introduced.
  • the compressed-air tubing is held by a pull-relieving clamp 2'.
  • the current-supply cable 4 lies in air tubing 2 and is introduced together with the tubing into the handle 1, within which the end of the cable is secured by a separate pullrelieving clamp 5 on the carrier 7.
  • Numeral 9 designates a potentiometer for regulation of the heating current.
  • the hot-air generator 10 which comprises an outer tube 1 I, a central air-directing tube 12 and an inner air-guiding tube I3, the outer tube 11 forming'the jacket of the hot-air generator and being connected to handle I by a flange 11'.
  • the outside of front end wall II" of jacket tube 11 has arranged thereon the hot-air jet noule 14, while the inrier side thereof has fixed thereon the inner air-guiding tube 13, open at its rear end.
  • Numeral denotes the resistance heating element which is fitted with clearance into the inner tube 13 in order to form a hot-air duct 16, with the resistance heating spiral situated directly in the air current.
  • the central means 12 serving as airdirecting tube is partly open at the front and is provided with a closing cover 12' at the back. Together with the inner tube 13 it forms the retum-flow duct 17. Formed between the directing tube 13 and the jacket tube 11 is the outer hollow cylindrical air duct 18. In this duct the air is preheated, and at the same time the jacket tube 11 is effectively cooled.
  • a bimetallic thermostat 19 is fitted in the retum-flow duct 17 between said tube 12 and inner tube 11. Thermostat 19 is located at a passage opening 20 (FIG. 3) of the front partial closure 12" of the central tube I2, constricting the retum-flow duct 17.
  • the speed at which the air flows is greatly increased, so that an interruption of current by the thermostat can only occur when the air flow is insuffic
  • 21 designates a thermistor or semiconductor for keeping the temperature of the hot air constant. This thermistor projects into the hot-air duct 16 immediately ahead of the hot-air outlet at the jet nozzle I4, while its connecting portion lies in the cold-air zone I8 outside the inner tube I3.
  • the electronic control device arranged in handle I allows the heating capacity of resistance RL of heating element 15 to be continuously regulated through a potentiometer 9, shown at RP in FIG. 4.
  • the heating is regulated by means of a TRIAC, which is controlled through a stabilized voltage divider and two Zener diodes D D, which are coupled in opposition to the transistors T T
  • the voltage divider which is formed by thermistor RT and potentiometer RP, the bases of the transistors are controlled.
  • the purpose of the Zener diodes is to compensate a fluctuation of i 10 percent in the line voltage.
  • a hot-air dispenser comprising:
  • an elongated hollow handle having means defining an air flow passage therethrough;
  • a heating unit affixed to the other end of said handle and including an outer cylindrical tube, a central cylindrical tube coaxially received in said outer cylindrical tube with a clearance communicating with the interior of said handle airflow passage at the end proximal said handle and receiving air therefrom, the end of the clearance remote from the handle being closed, and an inner cylindrical tube coaxially received in said central cylindrical tube with a second clearance closed at the end proximal the handle and' communicating with the first-mentioned clearance remote from said handle, the interior of said inner tube communicating with said second clearance proximal to said handle",
  • a resistive heating element received in said inner tube and defining therewith a heating chamber traversable by air;
  • temperature control means including circuit means received in the airflow passage of said handle, exposed to the flow of cooling air therethrough, and connected to said resistor heating element for controlling the current flow therethrough, and a temperature-responsive element positioned immediately ahead of said nozzle means and exposed to air traversing said chamber and connected to said circuit means.
  • said circuit means includes a potentiometer mounted in said handle, said dispenser further comprising temperature-responsive switch means in one of said clearances for disconnecting said resistive heating element upon failure of the air supply of said chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)
  • Pipe Accessories (AREA)
US698763A 1967-01-20 1968-01-18 Electrically heated hot-air dispenser Expired - Lifetime US3560710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH97167A CH445671A (de) 1967-01-20 1967-01-20 Elektrisches Heissluft-Strahlgerät, insbesondere zum Schweissen von thermoplastischen Kunststoffen

Publications (1)

Publication Number Publication Date
US3560710A true US3560710A (en) 1971-02-02

Family

ID=4199454

Family Applications (1)

Application Number Title Priority Date Filing Date
US698763A Expired - Lifetime US3560710A (en) 1967-01-20 1968-01-18 Electrically heated hot-air dispenser

Country Status (6)

Country Link
US (1) US3560710A (de)
AT (1) AT298047B (de)
CH (1) CH445671A (de)
DE (1) DE1704061C3 (de)
FR (1) FR1556453A (de)
NL (1) NL6800907A (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770938A (en) * 1971-02-12 1973-11-06 Petroles Fr Cie Des Tank heater for respiratory mixtures used in deep diving
US3783236A (en) * 1973-03-02 1974-01-01 Gte Sylvania Inc Electrically operated steam heater
US3852565A (en) * 1972-09-12 1974-12-03 A Kager Solder feeding soldering gun with temperature control
US3873029A (en) * 1973-11-12 1975-03-25 Amerace Corp Adaptor for flameless heat tools
US3883716A (en) * 1971-03-08 1975-05-13 William S Fortune Temperature controlled soldering instrument
US3943326A (en) * 1972-11-24 1976-03-09 Royel International Pty. Ltd. Temperature control circuit for a hand held soldering tool
US4063067A (en) * 1975-07-08 1977-12-13 Commissariat A L'energie Atomique Furnace for heating a circulating gas stream especially for producing molecular jets
DE2849316A1 (de) * 1978-11-14 1980-06-26 Eichenauer Fa Fritz Elektrisches warmluftgeraet
US4557205A (en) * 1983-08-26 1985-12-10 J. Strobel & Sohne Gmbh & Co. Fur sewing machine with heated air blower
US4926028A (en) * 1983-03-01 1990-05-15 Fortune William S Hot air heated soldering instrument
US5111527A (en) * 1990-03-12 1992-05-05 Gte Products Corporation Electric heater with thermistor temperature control
DE4214813A1 (de) * 1992-05-04 1993-11-11 Daimler Benz Ag Heißluft-Handschweißgerät zum manuellen Schweißen von thermoplastischen Kunststoffen
US6144802A (en) * 1999-06-29 2000-11-07 Hyundai Electronics Industries Co., Ltd. Fluid heater for semiconductor device
US6169850B1 (en) 1998-02-24 2001-01-02 Menassa Cherif Air heating device
US20050109764A1 (en) * 2003-11-25 2005-05-26 National Environmental Products, Ltd. Forced-air heater control system and method
US20060133782A1 (en) * 2004-09-27 2006-06-22 Roland Otto Air stream heater
EP1852742A3 (de) * 2000-09-01 2008-02-13 FUJIFILM Corporation Verfahren und Vorrichtung zur Verpackung einer lichtabschirmenden und lichtempfindlichen Materialrolle und Vorrichtung zur Erhitzung und Zufuhr einer Flüssigkeit
US20110202019A1 (en) * 2009-12-04 2011-08-18 Mt Industries, Inc. Hand held skin treatment spray system with air heating element
US20110259974A1 (en) * 2009-12-04 2011-10-27 Mt Industries, Inc. Base unit for hand held skin treatment spray system
US9949570B1 (en) * 2016-12-19 2018-04-24 James C. Young Bed warmer system

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3610881A (en) * 1968-07-29 1971-10-05 Trigg Stewart Portable electric air-heating gun and oven
FR2050370B1 (de) * 1969-07-30 1975-09-26 Calor Sa
EP0048772B2 (de) * 1980-09-30 1989-08-02 Cooper Industries, Inc. Heissluftgerät zum Entlöten, Löten, Schrumpfen u.dgl.
GB8306199D0 (en) * 1983-03-07 1983-04-13 Skilten Electronics Ltd Heated gas blower device
AT381275B (de) * 1984-11-13 1986-09-25 Neumueller Walter Schweissgeraet
US4855004A (en) * 1987-06-26 1989-08-08 Clements National Company Seam welding machine for thermoplastic material
DE9304449U1 (de) * 1993-03-24 1993-05-27 Rovema - Verpackungsmaschinen GmbH, 6301 Fernwald Heißluft-Schweißvorrichtung

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1227324A (en) * 1915-11-17 1917-05-22 Electro Dental Mfg Company Air-heater.
US1313861A (en) * 1919-08-19 James ernest reid
US1946262A (en) * 1932-02-16 1934-02-06 J C Adams Company Ltd Hot air gun
DE662887C (de) * 1938-07-23 Alfred Fliess Heissluftdusche als Zusatzgeraet fuer elektrische Staubsauger
US2609477A (en) * 1948-02-18 1952-09-02 Laddy F Borda Apparatus for vulcanizing a repair area of a pneumatic tire
US2681408A (en) * 1952-04-08 1954-06-15 Ritter Co Inc Syringe
US3149224A (en) * 1961-11-24 1964-09-15 Monsanto Co Heater control circuit
CH400548A (de) * 1963-05-03 1965-10-15 Ruoss Ernst Brenner zum Schweissen von thermoplastischen Kunststoffen
US3419708A (en) * 1966-04-06 1968-12-31 Whirlpool Co Electronic heat control for dryer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1313861A (en) * 1919-08-19 James ernest reid
DE662887C (de) * 1938-07-23 Alfred Fliess Heissluftdusche als Zusatzgeraet fuer elektrische Staubsauger
US1227324A (en) * 1915-11-17 1917-05-22 Electro Dental Mfg Company Air-heater.
US1946262A (en) * 1932-02-16 1934-02-06 J C Adams Company Ltd Hot air gun
US2609477A (en) * 1948-02-18 1952-09-02 Laddy F Borda Apparatus for vulcanizing a repair area of a pneumatic tire
US2681408A (en) * 1952-04-08 1954-06-15 Ritter Co Inc Syringe
US3149224A (en) * 1961-11-24 1964-09-15 Monsanto Co Heater control circuit
CH400548A (de) * 1963-05-03 1965-10-15 Ruoss Ernst Brenner zum Schweissen von thermoplastischen Kunststoffen
US3419708A (en) * 1966-04-06 1968-12-31 Whirlpool Co Electronic heat control for dryer

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3770938A (en) * 1971-02-12 1973-11-06 Petroles Fr Cie Des Tank heater for respiratory mixtures used in deep diving
US3883716A (en) * 1971-03-08 1975-05-13 William S Fortune Temperature controlled soldering instrument
US3852565A (en) * 1972-09-12 1974-12-03 A Kager Solder feeding soldering gun with temperature control
US3943326A (en) * 1972-11-24 1976-03-09 Royel International Pty. Ltd. Temperature control circuit for a hand held soldering tool
US3783236A (en) * 1973-03-02 1974-01-01 Gte Sylvania Inc Electrically operated steam heater
US3873029A (en) * 1973-11-12 1975-03-25 Amerace Corp Adaptor for flameless heat tools
US4063067A (en) * 1975-07-08 1977-12-13 Commissariat A L'energie Atomique Furnace for heating a circulating gas stream especially for producing molecular jets
DE2849316A1 (de) * 1978-11-14 1980-06-26 Eichenauer Fa Fritz Elektrisches warmluftgeraet
US4321456A (en) * 1978-11-14 1982-03-23 Firma Fritz Eichenauer Electrical hot air appliance
US4926028A (en) * 1983-03-01 1990-05-15 Fortune William S Hot air heated soldering instrument
US4557205A (en) * 1983-08-26 1985-12-10 J. Strobel & Sohne Gmbh & Co. Fur sewing machine with heated air blower
US5111527A (en) * 1990-03-12 1992-05-05 Gte Products Corporation Electric heater with thermistor temperature control
DE4214813A1 (de) * 1992-05-04 1993-11-11 Daimler Benz Ag Heißluft-Handschweißgerät zum manuellen Schweißen von thermoplastischen Kunststoffen
US6169850B1 (en) 1998-02-24 2001-01-02 Menassa Cherif Air heating device
US6144802A (en) * 1999-06-29 2000-11-07 Hyundai Electronics Industries Co., Ltd. Fluid heater for semiconductor device
EP1852742A3 (de) * 2000-09-01 2008-02-13 FUJIFILM Corporation Verfahren und Vorrichtung zur Verpackung einer lichtabschirmenden und lichtempfindlichen Materialrolle und Vorrichtung zur Erhitzung und Zufuhr einer Flüssigkeit
US20050109764A1 (en) * 2003-11-25 2005-05-26 National Environmental Products, Ltd. Forced-air heater control system and method
US20060006167A1 (en) * 2003-11-25 2006-01-12 Zev Kopel Forced-air heater control system and method
US7012223B2 (en) 2003-11-25 2006-03-14 National Environmental Products, Ltd. Forced-air heater control system and method
US7119308B2 (en) 2003-11-25 2006-10-10 Zev Kopel Forced-air heater control system and method
US20060133782A1 (en) * 2004-09-27 2006-06-22 Roland Otto Air stream heater
US20110202019A1 (en) * 2009-12-04 2011-08-18 Mt Industries, Inc. Hand held skin treatment spray system with air heating element
US20110259974A1 (en) * 2009-12-04 2011-10-27 Mt Industries, Inc. Base unit for hand held skin treatment spray system
US9949570B1 (en) * 2016-12-19 2018-04-24 James C. Young Bed warmer system

Also Published As

Publication number Publication date
CH445671A (de) 1967-10-31
DE1704061A1 (de) 1971-09-02
FR1556453A (de) 1969-02-07
AT298047B (de) 1972-04-25
NL6800907A (de) 1968-07-22
DE1704061C3 (de) 1975-01-30
DE1704061B2 (de) 1974-06-12

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