US3849630A - Electric heating device - Google Patents
Electric heating device Download PDFInfo
- Publication number
- US3849630A US3849630A US00298673A US29867372A US3849630A US 3849630 A US3849630 A US 3849630A US 00298673 A US00298673 A US 00298673A US 29867372 A US29867372 A US 29867372A US 3849630 A US3849630 A US 3849630A
- Authority
- US
- United States
- Prior art keywords
- core
- cable
- sleeve
- groove
- elongate
- Prior art date
- 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
Links
- 238000005485 electric heating Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 34
- 239000011707 mineral Substances 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims description 32
- 238000007789 sealing Methods 0.000 claims description 12
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 239000011810 insulating material Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 230000000295 complement effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000004753 textile Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2737—Heating or cooling means therefor
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C2045/2777—Means for controlling heat flow or temperature distribution in the nozzle
Definitions
- An elongate heating device comprises a preformed elongate core having at least one helical groove in its outer surface and a separately formed sleeve of an internal diameter greater than the external diameter of said surface of the core which surrounds the core and has in its inner surface at least one helical groove that is of the same pitch as that of the groove on the core and that defines with the groove on the core a helical passage, the core and/or the sleeve being of a metal of high thermal conductivity.
- a length of mineral insu lated heating cable extends along the helical passage between the core and the sleeve with at least one of its ends protruding from the device.
- the cable is so clamped between the core and the sleeve that there is an effective heat transfer path between the cable sheath and the core and/or between the cable sheath and the sleeve.
- This invention relates to electric heating devices and is particularly concerned with electric heating devices 'of the kind incorporating, as a heating element, a mineral insulated heating cable comprising one or more bare conductors enclosed in a metallic sheath of high. thermal conductivity and electrically insulated from the sheath and, where there is more than one conductor from one another, by compacted powdered mineral insulating material, usually but not necessarily magnesium oxide.
- an electric heating device of this kind of substantially uniform crosssection for instance a tubular heating roll for use in the textile industry, by winding a length of mineral insulated heating cable on a tubular core, positioning the core carrying the heating cable in an annular mould with an end or ends of the cable projecting from the mould, and casting a metal of high thermal conductivity about the core-to form a cast heating roll haying an...
- the object of the present invention to provide an improved method of manufacturing an elongate heating device incorporating a mineral insulated heating element in which the risk of rejects during manufacture is substantially reduced.
- the invention also includes an elongate heating device made by the aforesaid method which has the important advantage, that in the event of a fault developing in the heating element, the heating element can be quickly and easily replaced.
- the method comprises forming at least one helical groove in an outer surface of an elongate core; forming at least one helical groove of the same pitch as that of the groove on the core in the inner surface of a sleeve having an internal diameter which is greater than the external diameter of said surface of the core, the core and/or the sleeve being of a metal of high thermal conductivity; winding a length of mineral insulated heating cable in the groove in the core or in the groove in the sleeve to form a male thread; and screwing the core and the sleeve together so that one or each end of the cable protrudes from the heating device so formed and the cable is so clamped between the core and the sleeve that an effective heat transfer path is provided between the cable sheath and the core and/or between the cable sheath and the sleeve.
- the core or the sleeve may be of a material of low thermal conductivity, for example a ceramic material. It will be appreciated that by appropriate selection of the materials of the core and of the sleeve a major proportion of the heat emitted by the heating device of the present invention may be encouraged to flow radially outwardly only, radially inwardly only or both radially outwardly and radially inwardly.
- the or each groove in the core and the or each groove in the sleeve are each of a cross-section approximating to that of a semi-circle having a radius 'equal to or slightly greater than half the overall diameter of the heating cable.
- the mineral insulated heating cable will normally, but not necessarily, be cut to a predetermined length before it is wound on the core.
- the cable employed preferably has two conductors embedded in the-comp'acted insulation and in this case exposed ends of the conductors at one end of the length of cable are electrically connected together and enclosed in a sealed termination generally known as the hot end" termina tion, and this sealed end of the cable is welded, brazed or otherwise secured in the groove in the core or in the groove in the sleeve at or near one end of the groove.
- the cable is welded, brazed or otherwise secured in the groove in the core or in the groove in the sleeve at or near the other end of the groove.
- the other end of the cable may be arranged to protrude through an end wall of the core where the cable is sealed, pref erably by means'of a conventional sealing pot, this cold end termination.
- a single length of mineral insulated cable may be folded back between its ends to form a doubled length of cable which is wound in the two grooves in the core or in the sleeve with the folded end of the cable welded or otherwise secured in a recess in the core or sleeve at or near one end of the grooves and with both ends of the cable protruding from the same end of the device.
- core and sleeve each has two or more grooves
- two or more separate single lengths of mineral insulated cable each having two conductors may be wound in the grooves in the core or sleeve, the conductors of one cable being of a different cross-sectional area from that of the conductors of the other cable or cables thereby providing two or more heating elements that may be used separately or in combination.
- the core may be of solid form but where the heating deviceis intended to be mounted on or to constitute an injection noule or where the heating device is intended for use as a heater for a textile roller the core is, or preferably is, of tubular cross-section.
- the cable sheath is preferably made of stainless steel and the core and/or sleeve are each preferably made of mild steel.
- the invention also includes an elongate heating device comprising a preformed elongate core having. at least one helical groove in its outer surface; a separately formed sleeve of an internal diameter greater than the external diameter of said surface of the core which surrounds the core and has in its inner surface at least one helical groove that is of the same pitch as that of the groove on the core and that defines with the groove on the core at least one helical passage, the core and/or sleeve being of a metal of high thennal conductivity; and a length of mineral insulated heating cable which extends along the helical passage between the core and the sleeve with one or each of its ends protru'ding from the device and which is so clamped between the core and the sleeve that there is an effective heattransfer path between the cable sheath and the core and/or between the cable sheath and the sleeve.
- FIG. 1 is a sectional side view of an electric roll heater unit for use in the textile industry
- FIG. 2 is an end view of the roll heater shown in FIG.
- FIG. 3 is a sectional side view of an electrically heated injection nozzle for a die casting machine
- FIG. 4 is an end view of the heated injection nozzle shown in FIG. 3,
- FIG. 5 is a sectional side view of a second form of electrid roll heater unit for use in the textile industry
- FIG. 6 is an end view of the roll heater shown in FIG. 5.
- the roll heater unit comprises a tubular core 1 of mild steel of circular crosssection having at one end a radially outwardly extending flange 2 in which are a plurality of holes 3 for use in mounting the unit on a support.
- the core 1 has a bore of circular cross-section.
- Formed in the outer cylindrical surface of the core 1 is a helical groove 4 of semi-circular cross-section having a radius equal to or slightly greater than half the overall diameter of the mineral insulated heating cable that is to be wound in the groove.
- a part 5 of the groove extends in a lengthwise direction to a hole 6 in the flange.
- a predetermined length of mineral insulated heating cable 11 having two conductors and a stainless steel sheath is sealed at one end to form a hot end termination 12 and is sealed at the other end by a conventional sealing pot l3 incorporating a ceramic and metal or glazed high temperature seal to form a cold end termination.
- the hot end 12 of the cable 11 is slipped through the hole 6 and the cable is pulled through the hole until the sealing pot 13 abuts the end face of the flange 2 and an adjoining length of the cable lies in the part 5 of the groove 4.
- the cable is welded or brazed in the groove 4 at 14.
- the cable is tightly wound in the helical groove 4 and the hot end 12 of the cable is welded or brazed in the groove at 15 to form a male thread on the core.
- a sleeve 8 of mild steel whose bore is stepped near one end has a helical groove 9 formed in the internal surface of a major part of the bore that is of internal diameter greater than the external diameter of the core 1, the groove having the same pitch and cross-section as the groove 5.
- the sleeve 8 is screwed on the threaded core 1 with an end of the sleeve abutting the flange 2 and a radially inwardly extending flange 10 on the other end of the sleeve abutting the other end of the core.
- the heated injection nozzle shown in FIGS. 3 and 4 comprises a tubular core 21 of mold steel having over an intermediate major part of its length a cylindrical surface of circular cross-section and at one end an outlet 22.
- the core 21 has a bore of circular cross-section whose diameter increases smoothly at the outlet 22.
- a helical groove 24 is formed in the outer cylindrical surface of the intermediate major part of the core 21, the groove being of a semi-circular cross-section having a radius equal to or slightly greater than half the overall diameter of the mineral insulated heating cable that is diameter of the core.
- the sleeve 28 has a radially inwardly extending flange 30 at one end.
- a predetermined length of mineral insulated heating cable 31 having two conductors and a stainless steel sheath is sealed at one end to form a hot end termination 32 and is sealed at the other end by a conventional sealing pot 33 incorporating a ceramic and metal or glazed high temperature seal to form a cold end" termination.
- the hot end 32 of the cable 31 is welded or brazed in the helical groove 29 at 35 and the cable is tightly wound in the groove to form a male thread in the bore of the sleeve, the cable also being welded or brazed in the groove at 34.
- the core 21 is screwed into the threaded sleeve 28 with the step between the intermediate major part of the core and the outlet 22 abutting the flange 30 and with a short length of the cable 31 with the sealing pot 33 attached to its end protruding from the other end of the nozzle.
- the very small clearance between the mineral insulated cable 31 and the surrounding metal of the core 21 and of the sleeve 28, substantially reduced as the nozzle is heated and expansion of the cable sheath takes place, provides an effective heat transfer path between the cable sheath and the core and between the cable sheath and the sleeve.
- the roll heater unit shown in FIGS. 5 and 6 comprises a tubular core 41 of mild steel of circular cross section having at one end a radially outwardly extending flange 42 in which are a plurality of holes 43 for use in mounting the unit on a support.
- the core 41 has a bore of circular cross-section.
- Formed in the outer cylindrical surface of the core 41 are two helical grooves 44, 44 of substantially the same pitch each of semicircular cross-section having a radius equal to or slightly greater than half the overall diameter of the mineral insulated heating cables that are to to be wound in the grooves.
- parts 45, 45' of the grooves are parts 45, 45' of the grooves, each of which extends in a lengthwise direction to holes 46, 46' in the flange.
- the cable 51 is tightly wound in the groove 44 and is welded or brazed in the groove at 54 and 55.
- the cable 51' is tightly wound in the groove 44' and is welded or brazed at 54' and 55'.
- a sleeve 48 of mild steel whose bore is stepped near one end, has two helical grooves 49, 49' in the internal surface of a major part of the bore, each groove being of substantially the same pitch and cross-section as the grooves 44, 44' in the core 41'.
- the sleeve 48 is screwed on the thread core 41 with an end of the sleeve abutting the flange 42 and a radially inwardly extending flange 50 on the other end of the sleeve abutting the other end of the core.
- the conductors of the cable 51 are of a different cross-sectional area from that of the conductors of the cable 51, thereby providing two heating elements that may be used separately or in combination.
- Electrical heating devices in accordance with the present invention can be manufactured from any suitable metal of high thermal conductivity in which it is possible to machine helical grooves and the upper temperature limit of the device is limited only by the metals used.
- a suitable metal of high thermal conductivity for example, for a stainless steel sheathed cable enclosed between a core and sleeve of mild steel a maximum temperature of approximately 750C is possible.
- electric heating devices of the present invention can be assembled by unskilled or semi-skilled labour with virtually no rejections due to assembly error.
- An elongate heating device comprising a preformed elongate core having at least one helical groove in its outer surface; a separately formed sleeve of an internal diameter greater than the external diameter of said surface of the core which surrounds the core and has in its inner surface at least one helical groove that is of the same pitch as that of the groove on the core and that defines with the groove on the core a helical passage, at least one of the core and the sleeve being of a metal of high thermal conductivity; a length of mineral insulated heating cable comprising an elongate metallic sheath of high thermal conductivity, at least one elongate bare electrical heating conductor in said metallic sheath and compacted powdered mineral insulating material sealing the space between the electric heating conductor and the metallic sheath and insulating said conductor from said metallic sheath, which cable extends along the helical passage between the core and the sleeve with at least one of its ends protruding from the device, and electrical terminal means connected to
- each groove is of a semi-circular crosssection having a radius substantially equal to half the overall diameter of the cable.
- An elongate heating device comprising a preformed elongate core having at least one helical groove in its outer surface; a separately formed sleeve of an internal diameter greater than the external diameter of said surface of the core which surrounds the core and has in its inner surface at least one helical groove that is of the same pitch as that of the groove on the core and that defines with the groove on the core a helical passage, at least one of the core and the sleeve being of a metal of high thermal conductivity; a length of mineral insulated heating cable comprising an elongate metallic sheath of high thermal conductivity, two elongate bare electrical heating conductors in said metallic sheath and compacted powdered mineral insulating material sealing the space between the electric heating conductors and the metallic sheath and insulating said conductors from each other and from said metallic sheath, said heating conductors being electrically connected together at one end of the lengths and enclosed in a sealed termination at said end, which cable extends along the heli
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Resistance Heating (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4836771A GB1359539A (en) | 1971-10-18 | 1971-10-18 | Electric heating device |
Publications (1)
Publication Number | Publication Date |
---|---|
US3849630A true US3849630A (en) | 1974-11-19 |
Family
ID=10448365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00298673A Expired - Lifetime US3849630A (en) | 1971-10-18 | 1972-10-18 | Electric heating device |
Country Status (6)
Country | Link |
---|---|
US (1) | US3849630A (it) |
CA (1) | CA970017A (it) |
CH (1) | CH556125A (it) |
DE (1) | DE2250778C3 (it) |
GB (1) | GB1359539A (it) |
IT (1) | IT966369B (it) |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4150281A (en) * | 1978-03-13 | 1979-04-17 | Tempco Electric Heater Corporation | Electric heater construction |
US4176274A (en) * | 1976-06-03 | 1979-11-27 | Pont-A-Mousson S.A. | Method of coupling plastic pipes by welding and a connection piece for coupling same |
FR2443919A1 (fr) * | 1978-12-14 | 1980-07-11 | Gellert Jobst | Buse de carotte chauffee electriquement pour moulage par injection |
US4224505A (en) * | 1977-06-03 | 1980-09-23 | Von Roll Ag | Electrically welding plastic sleeve |
US4238671A (en) * | 1979-05-08 | 1980-12-09 | Gellert Jobst U | Sprue bushing with cast in heater element |
US4253011A (en) * | 1979-12-13 | 1981-02-24 | Tempco Electric Heater Corporation | Plastic injection molding system having a temperature controlled electric heater element |
US4355460A (en) * | 1980-12-17 | 1982-10-26 | Gellert Jobst U | Sprue bushing and method of manufacture |
US4386262A (en) * | 1980-10-24 | 1983-05-31 | Gellert Jobst U | Sprue bushing with cast in electrical heating element |
US4558210A (en) * | 1984-08-03 | 1985-12-10 | Watlow Electric Manufacturing Company | Electric cast-metal heater |
US4586690A (en) * | 1983-07-13 | 1986-05-06 | Metzeler Kautschuk Gmbh | Apparatus for the manufacture of molded parts from molding compounds |
US4644140A (en) * | 1983-12-27 | 1987-02-17 | Turk & Hillinger Gmbh | Electric heating arrangement for spray nozzles |
US5051563A (en) * | 1987-07-21 | 1991-09-24 | Ewikon Entwicklung Und Konstruktion Gmbh & Co. Kg. | Surface heating element for components of tools and machines |
US6043466A (en) * | 1998-02-20 | 2000-03-28 | Husky Injection Molding Systems Ltd. | Hot runner heating clamp |
US6252210B1 (en) * | 1999-09-09 | 2001-06-26 | Hotset Heizpatronen U.Zubehor Gmbh | Electrical sleeve heater with built-in thermal sensor |
US6394784B1 (en) | 2000-03-08 | 2002-05-28 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
US6398264B1 (en) * | 2000-03-16 | 2002-06-04 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermally activated joining apparatus |
EP1382928A2 (de) * | 2002-07-15 | 2004-01-21 | Andreas Lewandowski | Beheizbare Rolle, insbesondere für Laminatoren |
EP1386717A1 (en) * | 2002-08-02 | 2004-02-04 | Mold-Masters Limited | Threaded removable heater for a hot runner nozzle |
US20040069771A1 (en) * | 2002-10-11 | 2004-04-15 | Hotset Heizpatronen U. Zubehor Gmbh | Electrical sleeve heater |
EP1724090A1 (en) * | 2005-05-19 | 2006-11-22 | Mold-Masters Limited | Injection nozzle with a thermal shroud and method of making the same |
US20080011098A1 (en) * | 2006-06-29 | 2008-01-17 | Krohne Ag | A heated pipe connecting device for installation of a flow meter |
EP1951495A1 (en) * | 2005-11-25 | 2008-08-06 | Mold-Masters Limited | Injection molding component with low profile terminal connection |
WO2018091945A1 (es) * | 2016-11-18 | 2018-05-24 | Jose Rodriguez Rodenas | Aparato calentador de roscas internas con termocopia para barras roscadas |
US11198239B2 (en) * | 2018-03-21 | 2021-12-14 | Plastic Engineering & Technical Services, Inc. | Heater band for hot runner injection molding systems |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3100092C2 (de) * | 1981-01-03 | 1983-01-27 | Türk & Hillinger GmbH & Co, 7200 Tuttlingen | Elektrischer Heizkörper insbesondere für Kunststoff-Spritzdüsen |
CA1230458A (en) * | 1984-07-13 | 1987-12-22 | Gellert, Jobst Ulrich | Injection molding heated nozzle with brazed in heating element and method of manufacture |
DE3606620A1 (de) * | 1986-02-28 | 1987-09-03 | Winkhaus Fa August | Elektronisches tuerschloss |
IL111846A0 (en) | 1994-12-01 | 1995-03-15 | Indigo Nv | Imaging apparatus and intermediate transfer blanket therefor |
US5089856A (en) * | 1989-02-06 | 1992-02-18 | Spectrum Sciences B.V. | Image transfer apparatus incorporating an internal heater |
US5335054A (en) * | 1989-02-06 | 1994-08-02 | Spectrum Sciences B.V. | Image transfer apparatus including intermediate transfer blanket |
CA2311829A1 (en) † | 2000-06-16 | 2001-12-16 | Jonathon Fischer | Thermally balanced hot runner nozzle |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466676A (en) * | 1946-04-19 | 1949-04-12 | Boling | Liquid cooling unit |
US2851571A (en) * | 1954-11-23 | 1958-09-09 | Gen Motors Corp | Electric heating unit |
US2987300A (en) * | 1959-05-29 | 1961-06-06 | Edward G S Greene | Heat transfer assembly |
US3067313A (en) * | 1961-02-06 | 1962-12-04 | Carl A Keyser | Ice melting and melt collecting device |
US3121154A (en) * | 1959-10-30 | 1964-02-11 | Babcock & Wilcox Ltd | Electric heaters |
US3355784A (en) * | 1966-01-05 | 1967-12-05 | Texas Instruments Inc | Heater for textile machinery |
US3384195A (en) * | 1955-04-15 | 1968-05-21 | Sunbeam Corp | Electric frying pan |
US3401439A (en) * | 1965-05-19 | 1968-09-17 | Gen Binding Corp | Laminating apparatus |
US3436816A (en) * | 1965-10-22 | 1969-04-08 | Jerome H Lemelson | Method of making heat transfer panelling |
US3454747A (en) * | 1967-03-27 | 1969-07-08 | Oliver M Hart | Flexible electric heating cable |
US3691347A (en) * | 1971-06-18 | 1972-09-12 | John J Finn | Electric heater |
-
1971
- 1971-10-18 GB GB4836771A patent/GB1359539A/en not_active Expired
-
1972
- 1972-10-17 IT IT53416/72A patent/IT966369B/it active
- 1972-10-17 CA CA154,025A patent/CA970017A/en not_active Expired
- 1972-10-17 DE DE2250778A patent/DE2250778C3/de not_active Expired
- 1972-10-18 CH CH1521872A patent/CH556125A/xx not_active IP Right Cessation
- 1972-10-18 US US00298673A patent/US3849630A/en not_active Expired - Lifetime
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2466676A (en) * | 1946-04-19 | 1949-04-12 | Boling | Liquid cooling unit |
US2851571A (en) * | 1954-11-23 | 1958-09-09 | Gen Motors Corp | Electric heating unit |
US3384195A (en) * | 1955-04-15 | 1968-05-21 | Sunbeam Corp | Electric frying pan |
US2987300A (en) * | 1959-05-29 | 1961-06-06 | Edward G S Greene | Heat transfer assembly |
US3121154A (en) * | 1959-10-30 | 1964-02-11 | Babcock & Wilcox Ltd | Electric heaters |
US3067313A (en) * | 1961-02-06 | 1962-12-04 | Carl A Keyser | Ice melting and melt collecting device |
US3401439A (en) * | 1965-05-19 | 1968-09-17 | Gen Binding Corp | Laminating apparatus |
US3436816A (en) * | 1965-10-22 | 1969-04-08 | Jerome H Lemelson | Method of making heat transfer panelling |
US3355784A (en) * | 1966-01-05 | 1967-12-05 | Texas Instruments Inc | Heater for textile machinery |
US3454747A (en) * | 1967-03-27 | 1969-07-08 | Oliver M Hart | Flexible electric heating cable |
US3691347A (en) * | 1971-06-18 | 1972-09-12 | John J Finn | Electric heater |
Cited By (48)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4176274A (en) * | 1976-06-03 | 1979-11-27 | Pont-A-Mousson S.A. | Method of coupling plastic pipes by welding and a connection piece for coupling same |
US4224505A (en) * | 1977-06-03 | 1980-09-23 | Von Roll Ag | Electrically welding plastic sleeve |
US4150281A (en) * | 1978-03-13 | 1979-04-17 | Tempco Electric Heater Corporation | Electric heater construction |
FR2443919A1 (fr) * | 1978-12-14 | 1980-07-11 | Gellert Jobst | Buse de carotte chauffee electriquement pour moulage par injection |
US4238671A (en) * | 1979-05-08 | 1980-12-09 | Gellert Jobst U | Sprue bushing with cast in heater element |
US4253011A (en) * | 1979-12-13 | 1981-02-24 | Tempco Electric Heater Corporation | Plastic injection molding system having a temperature controlled electric heater element |
US4386262A (en) * | 1980-10-24 | 1983-05-31 | Gellert Jobst U | Sprue bushing with cast in electrical heating element |
US4355460A (en) * | 1980-12-17 | 1982-10-26 | Gellert Jobst U | Sprue bushing and method of manufacture |
US4586690A (en) * | 1983-07-13 | 1986-05-06 | Metzeler Kautschuk Gmbh | Apparatus for the manufacture of molded parts from molding compounds |
US4644140A (en) * | 1983-12-27 | 1987-02-17 | Turk & Hillinger Gmbh | Electric heating arrangement for spray nozzles |
US4558210A (en) * | 1984-08-03 | 1985-12-10 | Watlow Electric Manufacturing Company | Electric cast-metal heater |
US5051563A (en) * | 1987-07-21 | 1991-09-24 | Ewikon Entwicklung Und Konstruktion Gmbh & Co. Kg. | Surface heating element for components of tools and machines |
US6043466A (en) * | 1998-02-20 | 2000-03-28 | Husky Injection Molding Systems Ltd. | Hot runner heating clamp |
US6252210B1 (en) * | 1999-09-09 | 2001-06-26 | Hotset Heizpatronen U.Zubehor Gmbh | Electrical sleeve heater with built-in thermal sensor |
US7377768B2 (en) | 2000-03-08 | 2008-05-27 | Mold-Masters (2007) Limited | Hot runner nozzle with removable sleeve |
US7438551B2 (en) | 2000-03-08 | 2008-10-21 | Mold-Masters (2007) Limited | Compact cartridge hot runner nozzle |
US6561789B2 (en) | 2000-03-08 | 2003-05-13 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
US6638053B2 (en) | 2000-03-08 | 2003-10-28 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
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US7413432B2 (en) | 2000-03-08 | 2008-08-19 | Mold-Masters (2007) Limited | Compact cartridge hot runner nozzle |
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US6394784B1 (en) | 2000-03-08 | 2002-05-28 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
US6761557B2 (en) | 2000-03-08 | 2004-07-13 | Mold-Masters Limited | Compact cartridge hot runner nozzle |
US7108502B2 (en) | 2000-03-08 | 2006-09-19 | Mold-Masters Limited | Hot runner nozzle with interlaced heater and sensor |
US6398264B1 (en) * | 2000-03-16 | 2002-06-04 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Thermally activated joining apparatus |
EP1382928A3 (de) * | 2002-07-15 | 2004-04-21 | Andreas Lewandowski | Beheizbare Rolle, insbesondere für Laminatoren |
EP1382928A2 (de) * | 2002-07-15 | 2004-01-21 | Andreas Lewandowski | Beheizbare Rolle, insbesondere für Laminatoren |
US20040258793A1 (en) * | 2002-08-02 | 2004-12-23 | Mold-Masters Limited | Removable heater for a hot runner nozzle |
US6780003B2 (en) | 2002-08-02 | 2004-08-24 | Mold-Masters Limited | Removable heater for a hot runner nozzle |
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CN100418728C (zh) * | 2002-08-02 | 2008-09-17 | 马斯特模具(2007)有限公司 | 用于热流道喷嘴的可拆卸加热器 |
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US20040069771A1 (en) * | 2002-10-11 | 2004-04-15 | Hotset Heizpatronen U. Zubehor Gmbh | Electrical sleeve heater |
US20060263469A1 (en) * | 2005-05-19 | 2006-11-23 | Mold-Masters Limited | Thermal shroud and method of making same |
EP1724090A1 (en) * | 2005-05-19 | 2006-11-22 | Mold-Masters Limited | Injection nozzle with a thermal shroud and method of making the same |
CN100500319C (zh) * | 2005-05-19 | 2009-06-17 | 马斯特模具(2007)有限公司 | 注塑模热流道喷嘴及其制造方法 |
US7703188B2 (en) | 2005-05-19 | 2010-04-27 | Mold-Masters (2007) Limited | Thermal shroud and method of making same |
US20100233310A1 (en) * | 2005-05-19 | 2010-09-16 | Mold-Masters (2007) Limited | Thermal Shroud and Method of Making Same |
EP1951495A1 (en) * | 2005-11-25 | 2008-08-06 | Mold-Masters Limited | Injection molding component with low profile terminal connection |
EP1951495A4 (en) * | 2005-11-25 | 2011-05-04 | Mold Masters 2007 Ltd | INJECTION COMPONENT WITH CONNECTION CONNECTION TO LOW HEIGHT |
US20080011098A1 (en) * | 2006-06-29 | 2008-01-17 | Krohne Ag | A heated pipe connecting device for installation of a flow meter |
US8418565B2 (en) * | 2006-06-29 | 2013-04-16 | Krohne Ag | Heated pipe connecting device for installation of a flow meter |
WO2018091945A1 (es) * | 2016-11-18 | 2018-05-24 | Jose Rodriguez Rodenas | Aparato calentador de roscas internas con termocopia para barras roscadas |
US11198239B2 (en) * | 2018-03-21 | 2021-12-14 | Plastic Engineering & Technical Services, Inc. | Heater band for hot runner injection molding systems |
Also Published As
Publication number | Publication date |
---|---|
CA970017A (en) | 1975-06-24 |
DE2250778C3 (de) | 1975-03-13 |
IT966369B (it) | 1974-02-11 |
DE2250778A1 (de) | 1973-05-03 |
CH556125A (de) | 1974-11-15 |
GB1359539A (en) | 1974-07-10 |
DE2250778B2 (de) | 1974-06-27 |
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