EP0233922A1 - Zweimaterialien-giessverfahren und vorrichtung - Google Patents
Zweimaterialien-giessverfahren und vorrichtungInfo
- Publication number
- EP0233922A1 EP0233922A1 EP86905129A EP86905129A EP0233922A1 EP 0233922 A1 EP0233922 A1 EP 0233922A1 EP 86905129 A EP86905129 A EP 86905129A EP 86905129 A EP86905129 A EP 86905129A EP 0233922 A1 EP0233922 A1 EP 0233922A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- component
- injection molding
- recited
- cavity
- components
- 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.)
- Withdrawn
Links
- 239000000463 material Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000000465 moulding Methods 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 claims abstract description 53
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 230000004888 barrier function Effects 0.000 claims abstract description 6
- 230000009977 dual effect Effects 0.000 claims abstract description 4
- 230000001012 protector Effects 0.000 claims description 19
- 239000012748 slip agent Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 11
- 239000004033 plastic Substances 0.000 claims description 11
- 238000002844 melting Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- -1 polypropylene Polymers 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 5
- 229920001684 low density polyethylene Polymers 0.000 claims description 5
- 239000004702 low-density polyethylene Substances 0.000 claims description 5
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 5
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 5
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims 2
- 239000005977 Ethylene Substances 0.000 claims 2
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims 1
- 230000005855 radiation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 241000905957 Channa melasoma Species 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000036512 infertility Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
- B29C45/162—The materials being injected at different moulding stations using means, e.g. mould parts, for transferring an injected part between moulding stations
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- B29C45/2681—Moulds with rotatable mould parts
-
- 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
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1601—Making multilayered or multicoloured articles the injected materials not being adhered or bonded to each other
-
- 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
- B29C45/2756—Cold runner channels
Definitions
- the subject invention generally relates to injection molding methods and devices formed thereby and more specifically relates to two-material, two-component devices formed by injection molding in which a first component acts as a part of the mold to produce a second component.
- An advantage of using the outer layer of the neck as part of the mold for the inner layer is that no deviation occurs between the outer and inner layers of the neck of bottle.
- One feature of the device and method as taught by the Aoki reference is that the outer and inner layers of the neck of the bottle are not separable from one another after they have been formed.
- a method of injection molding a two-component part includes the steps of: first, injection molding a first component in one cavity of a multicavity mold utilizing a dual-injection unit molding machine; second, mechanically transferring a transport plate containing the first component, to a second cavity in the machine; and third, injection molding a second component over the first component in the second cavity wherein the first component, a core, and the second cavity together act as a mold to produce the second component during the injection molding of the second component.
- the first and second components are manually separable from each other after the second component has been molded.
- FIG.l illustrates a cross-section of a mold in accordance with the subject invention in the closed position
- FIG.2 is a cross-section of a two-material mold in the open position to be run in a dual injection unit molding machine illustrating the preferred embodiment of the subject invention
- FlG.3 is a side view of a device manufactured in ac- cordance with the subject invention.
- FIG. 1 illustrates a two-material injection mold 10 designed in accordance with the subject invention.
- the mold consists of a pair of support plates 12 that are used to sup- port the core retainer plate 14 and the cavity retainer plate 20.
- the core retainer plate 14 contains core inserts 16 and 18, sucker pin 40, sucker well bushing 44, and two leader pins 38 located 180 degrees apart.
- a transfer plate 19 is attached to a shaft that is contained in the support plate 12 on the core half of the mold. Transfer plate 19 contains cavity inserts 30 and 32, two leader pin bushings 34 located 180 degrees apart, and a sucker well bushing 44.
- .Cavity re ⁇ tainer plate 2U contains cavity inserts 22 and 24, runners 26 and 28, and two leader pin bushings 42 located 180 degrees apart.
- FIG. 2 illustrates the same mold illustrated in FIG. 1 in the open position depicting the first molded plastic component 46 and the second (finished) molded plastic component 48 sitting in cavity inserts 30 and 32 respectively. Also shown in FIG. 2 are molded runners 50 and 52 after they have been removed from the cavity retainer plate 20.
- the mold components used in FIG. 2 refer to the same mold components illustrated in FIG. 1. The method of the subject invention will now be described using the mold illustrated in FIGS. 1 and 2.
- a method of injection molding a two-component part which in ⁇ cludes a first step of injection molding a first component 46 in a first cavity 22 of multicavity mold 10. This injection molding step is performed when the mold is in the closed position as illustrated in FIG.l. A first material is injected through runner 26 to till cavity 22 during the first step.
- the mold is then opened by a hydraulic system (not shown) that is provided in a conventional injection molding machine.
- the hydraulic system causes the transfer plate 19 to be forced away from core retainer plate 14 to cause component b to be separated from core 16.
- the transfer plate is then rotated to cause component 46 to be positioned in alignment with core 18.
- the injection mold is then closed using leader -6-
- first component and the second cavity together act as a portion of the mold to form the second component.
- the hydraulic system again opens the mold and a knock-off device (not shown) knocks the completed two-component part out of the mold.
- the first and second components will remain bonded together until the second component is removed from the first. It is possible to main ⁇ tain the first and second components in a fixed, yet separable, relationship with one another in accordance with the subject invention due to the materials chosen Tor each molding step. The choice of materials is a key feature of the subject in ⁇ vention. In order for the first component to act as a portion of the mold for the second component yet produce a two-component device in which the components are separable from one another, it is necessary to use "semi-compatible" materials.
- the term "semi-compatible" means that only weak molecular bonds are formed between the two materials when one material is molded over the other. Such a weak molecular bond will allow components manufactured using semi-compatible materials, in accordance with the subject in ⁇ vention and to be maintainable in a fixed position relative to one another until force is used to separate the two components.
- the subject invention includes the provision that a second component will be weakly bonded to a first component after injection molding of the second component over the first component. These weak bonds are used to maintain the second component in a fixed relation to the first component until forcefully separated. In the preferred embodiment, a force of 1.0 to 15.0 pounds is needed to separate the second component from the first.
- the two materials chosen are such that the material used for the second component has a lower melting point than the material used for the first component.
- the need for the second material having a lower melting point than the first material has been recognized in the past as discussed above in the Background of the Invention.
- the need to use "semi-compatible" materials to form the weak molecular bonds as taught by the subject invention is considered to be unique.
- a variety of materials may be chosen to form each of the first and second components and in some instances it may be desirable to add a slip agent to the base material chosen to enhance separability of the components after manufacture.
- Some materials that have been found to be useful for forming the first component include acrylonitrile butadiene styrene (ABS) and nylon 6,6.
- ABS acrylonitrile butadiene styrene
- nylon 6,6 nylon 6,6
- Other materials may be used provided that they have a high melting point relative to the material used for the second component, semi-compatibility with the second material and capable ot being injection molded.
- Materials that have been found to be useful in forming the second component in ac ⁇ cordance with the subject invention include low density
- a slip agent may be added to the material used to form either the first or second component.
- Useful slip agents include N,N ethylene bis stearamide, erucyl -8-
- amide powder, and oleamide of alaic acid The percentage of slip agent added to the material used to fabricate each component will affect the force required to separate the first and second components from each other after manufacture. In general, a higher concentration of slip agent will decrease the force required to separate the two components. It has been shown that a slip agent concentration of 0.5 to 1.5% will give an acceptable removal force for the application specified. In the preferred embodiment, 0.5% oleamide of alaic acid is used as the slip agent. If high concentrations of slip agent are used in the materials used to form the components during manu ⁇ facture, the components could actually separate spontaneously after manufacture. This may be desirable in some applications but highly undesirable in others.
- a needle adapter consists of a male luer at one end of the adapter and a tubing interface opposite the male luer.
- the luer portion of the needle adapter is typically covered with a tip protector after manufacture to maintain sterility of the luer and the fluid path of the administration set until it is desired to be used.
- Needle adapters and tip protectors manufactured in the past using conventional techniques have been produced on separate machines. Each tip protector is then manually placed on a needle adapter to form an unsterile assembly.
- One problem en ⁇ countered with assemblies manufactured using conventional techniques is that the fit between the needle adapter and tip protector is not as consistent as desired.
- the subject in ⁇ vention eliminates this problem by molding the tip protector directly onto the needle adapter. In order to more fully com ⁇ prehend the details of the subject invention-; an example is provided below illustrating the use of the subject invention to manufacture tip protectors and needle adapters.
- Cyclolac CTB is dried at 18U degrees Fahrenheit for four hours to remove moisture from the material. The dried material is then introduced into the barrel of injection unit number one of a two injection unit molding machine. The Cyclolac CTB is plasticated at approximately 430 degrees Fahrenheit and then injected into a first cavity ,22, FIG. 2 with an injection pressure of approximately 500 pounds per square inch. The molded needle adapter 46 is allowed to cool in the cavity long enough for the plastic to solidify. The mold then opens, a transfer plate 19 is mechanically moved clear of the leader pins 38 and rotated 180 degrees, thus positioning the needle adapter 46 in line with cavity 24. Sub ⁇ sequently the mold closes.
- Low density polyethylene containing 0.5 percent oleamide of alaic acid additive as a slip agent is plasticated at 305 degrees Fahrenheit and then injected into cavity 24 with an injection pressure of approximately 300 pounds per square inch thus, forming a tip protector over the needle adapter.
- the tip protector is cooled in the mold long enough to allow for the finished piece part to be ejected from the mold without distortion.
- the mold opens, the finished part is ejected, and the above process is then repeated.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77082085A | 1985-08-28 | 1985-08-28 | |
| US770820 | 1985-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0233922A1 true EP0233922A1 (de) | 1987-09-02 |
| EP0233922A4 EP0233922A4 (de) | 1987-10-26 |
Family
ID=25089791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19860905129 Withdrawn EP0233922A4 (de) | 1985-08-28 | 1986-08-18 | Zweimaterialien-giessverfahren und vorrichtung. |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0233922A4 (de) |
| JP (1) | JPH0684029B2 (de) |
| CA (1) | CA1268914A (de) |
| WO (1) | WO1987001329A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10132789B2 (en) | 2013-11-20 | 2018-11-20 | Maschinenfabrik Reinhausen Gmbh | Apparatus and method for detecting gas |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618683B1 (fr) * | 1987-07-31 | 1992-03-06 | Aguettant Lab | Procede de fabrication de pieces d'acces de recipients de liquides de perfusion |
| DE9103553U1 (de) * | 1991-03-22 | 1991-07-04 | G.B. Boucherie N.V., Izegem, Be | |
| DE4140099C1 (de) * | 1991-12-05 | 1993-05-06 | Sueddeutsche Feinmechanik Gmbh, 6480 Waechtersbach, De | |
| FR2725152A1 (fr) * | 1994-09-30 | 1996-04-05 | Grosfilley Jean Pierre | Base tournante universelle de moules pour la multi-injection des matieres plastiques |
| EP1105175A1 (de) * | 1998-08-21 | 2001-06-13 | Medrad Inc. | Kupplungs- und tubus einheit für eine spritze |
| US6319236B1 (en) | 1998-11-06 | 2001-11-20 | Millipore Corporation | Universal outlet for filter units |
| AU2002355885A1 (en) * | 2001-08-16 | 2003-03-03 | Weidmann Plastics Technology Ag | Method for the production of a sealing cover and sealing cover produced by said method |
| IT1402358B1 (it) * | 2010-10-05 | 2013-08-30 | Borromini S R L | Procedimento di stampaggio ad iniezione ed apparecchiatura per la realizzazione di detto procedimento |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697255A (en) * | 1951-04-25 | 1953-09-16 | Ernest Verrinder Wagner | Improvements in and relating to injection moulding and articles produced thereby |
| DE1941479A1 (de) * | 1968-08-14 | 1970-02-19 | Dave Chapman Goldsmith & Yamas | Verfahren zur Herstellung von Kunststoffartikeln durch Spritzgiessen |
| FR2316060A1 (fr) * | 1975-06-20 | 1977-01-28 | Matsushita Electric Ind Co Ltd | Objets en matiere plastique comportant des organes ou des portions cooperant entre eux par glissement, et procede pour leur fabrication |
| DE2547619A1 (de) * | 1975-10-24 | 1977-04-28 | Christian Dipl Phys Ortmann | Injektionsspritze mit kanuele und schutzhuelle fuer die kanuele |
| EP0147571A2 (de) * | 1983-11-05 | 1985-07-10 | Fickenscher & Co. GmbH Werkzeug- und Formenbau | Werkzeug zum Spritzgiessen von Gegenständen aus Kunststoff |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3281295A (en) * | 1964-08-25 | 1966-10-25 | Capucio Eugene | Method of capping |
| US3344942A (en) * | 1966-04-05 | 1967-10-03 | Hedgewick Peter | Safety cap and container |
| GB1351284A (en) * | 1970-08-13 | 1974-04-24 | Btr Industries Ltd | Methods of providing end fittings on hoses |
| US3878282A (en) * | 1971-08-10 | 1975-04-15 | Ilikon Corp | Process for molding multilayer articles |
| JPS519679B2 (de) * | 1972-09-14 | 1976-03-29 | ||
| US4021524A (en) * | 1975-08-15 | 1977-05-03 | American Can Company | Method of making a collapsible tube with an integral cap |
| JPS5854022B2 (ja) * | 1976-08-07 | 1983-12-02 | 松下電器産業株式会社 | 摺動部を有する樹脂製品の製造方法 |
| US4371476A (en) * | 1978-12-26 | 1983-02-01 | Basf Wyandotte Corporation | Mold release agents containing oxidation stable polyoxyalkylenes |
| US4280976A (en) * | 1980-04-18 | 1981-07-28 | Holdt J W Von | Simultaneously molded threaded port and plug |
| JPS5835742A (ja) * | 1981-08-21 | 1983-03-02 | Victor Co Of Japan Ltd | 情報記録媒体円盤の製作に用いられるスタンパの製作法 |
| JPS58155867A (ja) * | 1982-03-12 | 1983-09-16 | テルモ株式会社 | 穿刺針および穿刺針付医療用容器 |
| JPS5939528A (ja) * | 1982-08-31 | 1984-03-03 | Katashi Aoki | 複合パリソンの射出成形方法及び装置 |
| JPS6061222A (ja) * | 1983-09-14 | 1985-04-09 | Nissan Motor Co Ltd | 射出成形装置 |
-
1986
- 1986-08-18 WO PCT/US1986/001694 patent/WO1987001329A1/en not_active Application Discontinuation
- 1986-08-18 JP JP61504456A patent/JPH0684029B2/ja not_active Expired - Fee Related
- 1986-08-18 EP EP19860905129 patent/EP0233922A4/de not_active Withdrawn
- 1986-08-27 CA CA000516975A patent/CA1268914A/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB697255A (en) * | 1951-04-25 | 1953-09-16 | Ernest Verrinder Wagner | Improvements in and relating to injection moulding and articles produced thereby |
| DE1941479A1 (de) * | 1968-08-14 | 1970-02-19 | Dave Chapman Goldsmith & Yamas | Verfahren zur Herstellung von Kunststoffartikeln durch Spritzgiessen |
| FR2316060A1 (fr) * | 1975-06-20 | 1977-01-28 | Matsushita Electric Ind Co Ltd | Objets en matiere plastique comportant des organes ou des portions cooperant entre eux par glissement, et procede pour leur fabrication |
| DE2547619A1 (de) * | 1975-10-24 | 1977-04-28 | Christian Dipl Phys Ortmann | Injektionsspritze mit kanuele und schutzhuelle fuer die kanuele |
| EP0147571A2 (de) * | 1983-11-05 | 1985-07-10 | Fickenscher & Co. GmbH Werkzeug- und Formenbau | Werkzeug zum Spritzgiessen von Gegenständen aus Kunststoff |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO8701329A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10132789B2 (en) | 2013-11-20 | 2018-11-20 | Maschinenfabrik Reinhausen Gmbh | Apparatus and method for detecting gas |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0233922A4 (de) | 1987-10-26 |
| WO1987001329A1 (en) | 1987-03-12 |
| CA1268914A (en) | 1990-05-15 |
| JPS63500651A (ja) | 1988-03-10 |
| JPH0684029B2 (ja) | 1994-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19870508 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB |
|
| A4 | Supplementary search report drawn up and despatched |
Effective date: 19871026 |
|
| 17Q | First examination report despatched |
Effective date: 19880518 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BAXTER INTERNATIONAL INC. |
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Effective date: 19900425 |
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Inventor name: BRAUSAM, RAYMOND Inventor name: DAPOLITO, STEVEN, R. |