CA2132401C - Electrical heater for mold of injection-molding machine - Google Patents
Electrical heater for mold of injection-molding machine Download PDFInfo
- Publication number
- CA2132401C CA2132401C CA002132401A CA2132401A CA2132401C CA 2132401 C CA2132401 C CA 2132401C CA 002132401 A CA002132401 A CA 002132401A CA 2132401 A CA2132401 A CA 2132401A CA 2132401 C CA2132401 C CA 2132401C
- Authority
- CA
- Canada
- Prior art keywords
- casing
- mold
- heater
- mold heater
- heater defined
- 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
- 238000001746 injection moulding Methods 0.000 title description 5
- 238000004382 potting Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims description 2
- 239000010949 copper Substances 0.000 claims description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229960000869 magnesium oxide Drugs 0.000 description 1
- 235000012245 magnesium oxide Nutrition 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 210000001331 nose Anatomy 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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
- H05B3/40—Heating elements having the shape of rods or tubes
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
-
- 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
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/42—Heating elements having the shape of rods or tubes non-flexible
- H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
-
- 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
- B29C2045/2743—Electrical heating element constructions
-
- 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
- B29C45/2738—Heating or cooling means therefor specially adapted for manifolds
-
- 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
- B29C45/72—Heating or cooling
- B29C45/73—Heating or cooling of the mould
- B29C45/7312—Construction of heating or cooling fluid flow channels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Resistance Heating (AREA)
Abstract
An electrical heater for a mold has an elongated tubu-lar casing made of a ductile metal and deformable by hand, a manually deformable electrical heating element extending longitu-dinally inside the casing, and a manually deformable mass of electrically insulating potting filling the casing around the element. The casing can be annularly corrugated and formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
Description
ELECTRICAL HEATER FOR MOLD OF INJECTION-MOLDING MACHINE
SPECIFICATION
FIELD OF THE INVENTION
The present invention relates to heater usable in an injection-molding mold.
BACKGROUND OF THE INVENTION
A standard heater for an injection-molding mold has a normally cylindrical casing made of metal and coaxially receiving an electrical resistance-type heater wire normally shaped as a helix. A mass of electrically insulating but thermally conduc-tive potting surrounds the heater wire and fills the interior of the casing. Terminals at one or both ends of the casing connect to the ends of the resistance wire. , Such a heater is seated in a groove in the mold and an , electrical current is passed through its heater element to heat it and the mold. When the element burns out, which is inevita-ble, the old heater is pried out and a new one is fitted to the groove, normally being potted in place with heat-conductive mate-rial or grout and/or being clamped down in the groove.
It is fairly common for the groove to be nonstraight.
Thus the heater must be bent to the necessary nonstraight shape.
' 24742-56 Since the casing is normally made of a high-alloy steel, this bending must take place in a shop and be carried out to high tolerances in order to ensure a good fit of the heater in the groove. Obviously this bending/fitting operation is expensive and considerably raises the cost of replacing the heaters in a mold plate. Moreover the refitting operation can be delayed as the appropriately bent heaters are made up.
OBJECTS OF THE INVENTION
It is therefore an object of the invention to provide an improved heater for an injection-molding mold.
Another object is to provide such a heater which can be installed in a simple low-cost manner.
A further object is the provision of a heater assembly for a mold which offers superior heat exchange and where the heater can easily be replaced.
SUMMARY OF THE INVENTION
According to the invention, there is provided an electrical heater for a mold, the heater comprising; an elongated tubular casing made of a ductile metal and deformable by hand; a manually deformable electrical heating element extending longitudinally inside the casing; and a manually deformable mass of electrically insulating potting filling the casing around the element; wherein the casing is annularly corrugated and unitarily formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion, and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
SPECIFICATION
FIELD OF THE INVENTION
The present invention relates to heater usable in an injection-molding mold.
BACKGROUND OF THE INVENTION
A standard heater for an injection-molding mold has a normally cylindrical casing made of metal and coaxially receiving an electrical resistance-type heater wire normally shaped as a helix. A mass of electrically insulating but thermally conduc-tive potting surrounds the heater wire and fills the interior of the casing. Terminals at one or both ends of the casing connect to the ends of the resistance wire. , Such a heater is seated in a groove in the mold and an , electrical current is passed through its heater element to heat it and the mold. When the element burns out, which is inevita-ble, the old heater is pried out and a new one is fitted to the groove, normally being potted in place with heat-conductive mate-rial or grout and/or being clamped down in the groove.
It is fairly common for the groove to be nonstraight.
Thus the heater must be bent to the necessary nonstraight shape.
' 24742-56 Since the casing is normally made of a high-alloy steel, this bending must take place in a shop and be carried out to high tolerances in order to ensure a good fit of the heater in the groove. Obviously this bending/fitting operation is expensive and considerably raises the cost of replacing the heaters in a mold plate. Moreover the refitting operation can be delayed as the appropriately bent heaters are made up.
OBJECTS OF THE INVENTION
It is therefore an object of the invention to provide an improved heater for an injection-molding mold.
Another object is to provide such a heater which can be installed in a simple low-cost manner.
A further object is the provision of a heater assembly for a mold which offers superior heat exchange and where the heater can easily be replaced.
SUMMARY OF THE INVENTION
According to the invention, there is provided an electrical heater for a mold, the heater comprising; an elongated tubular casing made of a ductile metal and deformable by hand; a manually deformable electrical heating element extending longitudinally inside the casing; and a manually deformable mass of electrically insulating potting filling the casing around the element; wherein the casing is annularly corrugated and unitarily formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion, and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
Thus according to this invention the heater can be bent by hand to fit the mold plate. The potting, which is relatively incompressible but flexible, allows the casing and element to bend without substantial change in the cross-sectional shape of the heater. The refitter need merely have a heater of the right length and diameter, and he can bend it at the site to fit the mold. This greatly simplifies the installation. Such a heater can be bent readily but will maintain its cross-sectional shape very well.
According to this invention the metal may contain copper. It can also be nickel.
Each leg and each bight portion may have a respective width with the transverse widths all generally the same.
According to more specific features of this embodiment of the invention the casing may have a transverse width that is about five times as great as the width of the legs. Furthermore, each web may have a longitudinal width equal to between one-fifth and one-seventh the width of the legs.
It is possible for the casing according to the invention to be of generally rectangular section with rounded longitudinally extending corners. Such a heater fits in a steel plate formed with a nonstraight groove of a section complementary to a section of the casing. The section of the groove may be generally rectangular with a plurality of flat sides and the plate having a face surface parallel to at least one of the sides.
According to this invention the metal may contain copper. It can also be nickel.
Each leg and each bight portion may have a respective width with the transverse widths all generally the same.
According to more specific features of this embodiment of the invention the casing may have a transverse width that is about five times as great as the width of the legs. Furthermore, each web may have a longitudinal width equal to between one-fifth and one-seventh the width of the legs.
It is possible for the casing according to the invention to be of generally rectangular section with rounded longitudinally extending corners. Such a heater fits in a steel plate formed with a nonstraight groove of a section complementary to a section of the casing. The section of the groove may be generally rectangular with a plurality of flat sides and the plate having a face surface parallel to at least one of the sides.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is a longitudinal section through an electrical heater according to the invention;
FIG. 2 is a section like FIG. 1 of another heater in accordance with this invention;
FIG. 3 is a top view of an assembly incorporating a heater according to the invention;
FIG. 4 is a cross-section taken along line IV--IV
of FIG. 3;
FIG. 5 is a section like FIG. 1 of another heater according to the invention; and 2~32~Q~
FIG. 6 is a section through a heater assembly in accor-dance with this invention.
SPECIFIC DESCRIPTION
As shown in FIG. 1 a heater 1 has a cylindrical metal-lic casing made of a highly ductile copper alloy and a helical resistance-heating wire 3 extending coaxially through it. A mass 4 of flexible Mg0 potting material fills the interior of the casing 2 around the element 3. The ends of the element 3 are connected to terminal pins 6 seated in ceramic end caps 5 fitted to the casing 2. This heater 1 can easily be plastically de-formed by hand.
FIG. 2 shows a heater cartridge la having a cylindrical casing 2a made of substantially pure nickel and containing a U-shaped resistive heating wire 3a seated in a mass 4a of potting.
At one end of the casing 2a a double-hole end cap 5a is traversed by a pair of terminal leads 6a connected to the ends of the heat-ing wire 3a and a nickel end cap 7 seals the opposite casing end. , FIGS. 3 and 4 show a heater cartridge 1b of the same construction as shown in FIG. 2 that has been bent into a J- or U-shape and fitted to a complementarily shaped groove 3 cut in a steel mold plate 9. The heater lb is typically grouted or potted in place and may be held down with nose-like clamps or the like.
The arrangement of FIG. 5 has a casing 2c which is corrugated, being formed of square U-section rings 10 secured ~~~~~o~
together by short U-shaped webs 11. A helical resistance-heating wire 3c extends coaxially through the casing 2c and a mass 4c of flexible potting material fills the interior of the casing 2c around the element 3c. The ends of the element 3c are connected to terminal pins 6c seated in ceramic end caps 5c fitted to the casing 2c.
The rings 10 are each formed by a pair of identical legs of a width w measured radially of the axis A which is iden-tical to a width w measured parallel to the axis a of bights joining the legs of each ring 10 together. The width w is equal to about one fifth of a diameter D of the heater lc. The webs 11 have-an axial length 1 equal to between one-fifth and one-seventh of the width w. The resultant assembly can easily be bent to fit a mold-plate groove.
In FIG. 6 a heater 1d has a generally square-section corrugated casing 2d made of high-alloy steel or even titanium and provided with a heater element 3d and magnesium-oxide potting 4d. This heater id is set in a plate 12 formed with a substan-tially square-section groove 13 complementary to the casing 2d.
The corners of the casing 2d and groove 13 are rounded. Clamping noses 14 secured in place by bolts 15 secure the heater 1d in place flush with an outer face 16 of the plate 12.
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
FIG. 1 is a longitudinal section through an electrical heater according to the invention;
FIG. 2 is a section like FIG. 1 of another heater in accordance with this invention;
FIG. 3 is a top view of an assembly incorporating a heater according to the invention;
FIG. 4 is a cross-section taken along line IV--IV
of FIG. 3;
FIG. 5 is a section like FIG. 1 of another heater according to the invention; and 2~32~Q~
FIG. 6 is a section through a heater assembly in accor-dance with this invention.
SPECIFIC DESCRIPTION
As shown in FIG. 1 a heater 1 has a cylindrical metal-lic casing made of a highly ductile copper alloy and a helical resistance-heating wire 3 extending coaxially through it. A mass 4 of flexible Mg0 potting material fills the interior of the casing 2 around the element 3. The ends of the element 3 are connected to terminal pins 6 seated in ceramic end caps 5 fitted to the casing 2. This heater 1 can easily be plastically de-formed by hand.
FIG. 2 shows a heater cartridge la having a cylindrical casing 2a made of substantially pure nickel and containing a U-shaped resistive heating wire 3a seated in a mass 4a of potting.
At one end of the casing 2a a double-hole end cap 5a is traversed by a pair of terminal leads 6a connected to the ends of the heat-ing wire 3a and a nickel end cap 7 seals the opposite casing end. , FIGS. 3 and 4 show a heater cartridge 1b of the same construction as shown in FIG. 2 that has been bent into a J- or U-shape and fitted to a complementarily shaped groove 3 cut in a steel mold plate 9. The heater lb is typically grouted or potted in place and may be held down with nose-like clamps or the like.
The arrangement of FIG. 5 has a casing 2c which is corrugated, being formed of square U-section rings 10 secured ~~~~~o~
together by short U-shaped webs 11. A helical resistance-heating wire 3c extends coaxially through the casing 2c and a mass 4c of flexible potting material fills the interior of the casing 2c around the element 3c. The ends of the element 3c are connected to terminal pins 6c seated in ceramic end caps 5c fitted to the casing 2c.
The rings 10 are each formed by a pair of identical legs of a width w measured radially of the axis A which is iden-tical to a width w measured parallel to the axis a of bights joining the legs of each ring 10 together. The width w is equal to about one fifth of a diameter D of the heater lc. The webs 11 have-an axial length 1 equal to between one-fifth and one-seventh of the width w. The resultant assembly can easily be bent to fit a mold-plate groove.
In FIG. 6 a heater 1d has a generally square-section corrugated casing 2d made of high-alloy steel or even titanium and provided with a heater element 3d and magnesium-oxide potting 4d. This heater id is set in a plate 12 formed with a substan-tially square-section groove 13 complementary to the casing 2d.
The corners of the casing 2d and groove 13 are rounded. Clamping noses 14 secured in place by bolts 15 secure the heater 1d in place flush with an outer face 16 of the plate 12.
Claims (10)
1. An electrical heater for a mold, the heater comprising:
an elongated tubular casing made of a ductile metal and deformable by hand;
a manually deformable electrical heating element extending longitudinally inside the casing; and a manually deformable mass of electrically insulating potting filling the casing around the element; wherein the casing is annularly corrugated and unitarily formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion, and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
an elongated tubular casing made of a ductile metal and deformable by hand;
a manually deformable electrical heating element extending longitudinally inside the casing; and a manually deformable mass of electrically insulating potting filling the casing around the element; wherein the casing is annularly corrugated and unitarily formed by a succession of like U-section rings each having a pair of parallel legs and a bight portion, and a succession of like rounded annular webs interconnecting the rings and each joining a leg of one respective ring with a leg of an adjacent respective ring.
2. The mold heater defined in claim 1 wherein the metal contains copper.
3. The mold heater defined in claim 1 wherein the metal is nickel.
4. The mold heater defined in claim 1, 2 or 3 wherein each leg and each bight portion has a respective width and the transverse widths are all generally the same.
5. The mold heater defined in claim 4 wherein the casing has a transverse width and that is about five times as great as the width of the legs.
6. The mold heater defined in claim 4 or 5 wherein each web has a longitudinal width equal to between one-fifth and one-seventh the width of the legs.
7. The mold heater defined in any one of claims 1 to 6 wherein the casing is of generally polygonal section.
8. The mold heater defined in claim 7 wherein the casing has rounded longitudinally extending corners.
9. The mold heater defined in any one of claims 1 to 8, further comprising a steel plate formed with a nonstraight groove of a section complementary to a section of the casing.
10. The mold heater defined in claim 9 wherein the sections are generally rectangular and have a plurality of flat sides, the plate having a face surface parallel to at least one of the sides.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4411887A DE4411887C2 (en) | 1992-12-16 | 1994-04-07 | Electric radiator for injection molds |
| DEP4411887.2 | 1994-04-07 | ||
| DEP4418828.5 | 1994-05-30 | ||
| DE4418828A DE4418828C5 (en) | 1992-12-16 | 1994-05-30 | Electric radiator for injection molds |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2132401A1 CA2132401A1 (en) | 1995-10-08 |
| CA2132401C true CA2132401C (en) | 2004-12-07 |
Family
ID=25935410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002132401A Expired - Lifetime CA2132401C (en) | 1994-04-07 | 1994-09-19 | Electrical heater for mold of injection-molding machine |
Country Status (4)
| Country | Link |
|---|---|
| CA (1) | CA2132401C (en) |
| CZ (2) | CZ288460B6 (en) |
| FR (1) | FR2718596B1 (en) |
| IT (1) | IT1272862B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3915041B2 (en) * | 1995-11-08 | 2007-05-16 | ホツトセツト・ハイツパトローネン・ウント・ツーベヘール・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング | Electric heating element for injection molding tools |
| AU5418998A (en) * | 1996-12-16 | 1998-07-15 | K & M Kite Limited | Formed tubing with longitudinally directed corrugations |
| US8263914B2 (en) | 2008-08-27 | 2012-09-11 | AMG IdealCast Corporation | Cartridge heater and method of use |
| WO2020180632A1 (en) * | 2019-03-01 | 2020-09-10 | Gentherm Incorporated | Resistance heat assisted cooling and heating technology |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2517918A1 (en) * | 1981-12-09 | 1983-06-10 | Bonet Andre | Mfg. electric element embedded in heat transfer unit - using ceramic former with resistance wire wound over and sprayed on insulating sheath fitting into metallic heat transfer unit |
| FR2652225B1 (en) * | 1989-09-19 | 1991-11-08 | Vulcanic | TUBULAR ELECTRIC HEATING ELEMENT AND ITS BENDING DEVICE, AND EXCHANGER COMPRISING SUCH AN ELEMENT. |
| DE9217183U1 (en) * | 1992-12-16 | 1993-02-18 | Hotset Heizpatronen und Zubehör GmbH, 5880 Lüdenscheid | Electric heater for injection molding tools |
-
1994
- 1994-09-19 CA CA002132401A patent/CA2132401C/en not_active Expired - Lifetime
- 1994-12-08 CZ CZ19943092A patent/CZ288460B6/en not_active IP Right Cessation
- 1994-12-23 FR FR9415733A patent/FR2718596B1/en not_active Expired - Lifetime
-
1995
- 1995-01-04 IT ITMI950011A patent/IT1272862B/en active IP Right Grant
-
1999
- 1999-12-14 CZ CZ19994540A patent/CZ287762B6/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| CA2132401A1 (en) | 1995-10-08 |
| CZ309294A3 (en) | 1995-11-15 |
| CZ287762B6 (en) | 2001-01-17 |
| FR2718596B1 (en) | 1997-04-11 |
| FR2718596A1 (en) | 1995-10-13 |
| IT1272862B (en) | 1997-07-01 |
| CZ288460B6 (en) | 2001-06-13 |
| ITMI950011A0 (en) | 1995-01-04 |
| ITMI950011A1 (en) | 1996-07-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20140919 |