[go: up one dir, main page]

WO2005068156A1 - Moule de compression a injection avec organe de guidage - Google Patents

Moule de compression a injection avec organe de guidage Download PDF

Info

Publication number
WO2005068156A1
WO2005068156A1 PCT/GB2004/005414 GB2004005414W WO2005068156A1 WO 2005068156 A1 WO2005068156 A1 WO 2005068156A1 GB 2004005414 W GB2004005414 W GB 2004005414W WO 2005068156 A1 WO2005068156 A1 WO 2005068156A1
Authority
WO
WIPO (PCT)
Prior art keywords
mould
parts
core
finger
injection
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.)
Ceased
Application number
PCT/GB2004/005414
Other languages
English (en)
Inventor
Peter Reginald Clarke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Im Pak Technologies Ltd
Original Assignee
Im Pak Technologies Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Im Pak Technologies Ltd filed Critical Im Pak Technologies Ltd
Publication of WO2005068156A1 publication Critical patent/WO2005068156A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • B29C45/2606—Guiding or centering means
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/30—Mounting, exchanging or centering
    • B29C33/303—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting
    • B29C33/304—Mounting, exchanging or centering centering mould parts or halves, e.g. during mounting centering cores
    • 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
    • B29C45/36—Moulds having means for locating or centering cores
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/56—Means for plasticising or homogenising the moulding material or forcing it into the mould using mould parts movable during or after injection, e.g. injection-compression moulding
    • B29C45/561—Injection-compression moulding
    • B29C2045/565—Closing of the mould during injection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7132—Bowls, Cups, Glasses

Definitions

  • the present invention relates to injection-compression moulding and is concerned in particular with an improvement of the mould described in PCT Publication O02/058909.
  • WO02/058909 which is believed to represent the closest prior art to the present invention, describes a mould for mounting between the platens of an injection moulding machine for injection compression moulding of a thin walled article.
  • the mould comprises a female mould part mounted on the stationary platen of a moulding machine and a pressure plate which is mounted on the moving platen and carries a core for closing the mould.
  • the core passes through, and is sealed relative to, a cylindrical bore in a rim closure ring, arranged between the female mould half and the pressure plate.
  • the rim closure ring is used to seal the mould cavity before the core reaches its end position.
  • the present invention therefore seeks to provide a mould in which the parts can be accurately aligned before the mould cavity is fully closed.
  • a mould for injection compression moulding of an article comprising a female mould part and a core part for mounting in use on the platens of an injection moulding machine for movement towards and away from one another between an open and a closed position, at least one of the parts being adjustable relative to the associated platen to permit the parts to be axially aligned with one another, wherein a plurality of guide fingers is provided on one of the mould parts and distributed about the core axis to be received in recesses of complementary shape in the other mould part as the mould parts approach the fully closed position, each finger having two parallel sided locating sections that are spaced from one another along the length of the finger, the locating section nearer the free end of the finger being narrower than the other and the length of each locating section being at least equal to the final part of the stroke of the platens during which compression of the injected plastics material takes place.
  • each finger lying between the two parallel sided sections is continuously tapering.
  • each of the fingers is flat and is secured to the core part and the recesses are formed in flat inserts releasably secured to the female mould part.
  • Figure 1 is a perspective view of a female mould part 30 looking into the mould cavity
  • Figure 2 is a perspective view of a core part to fit into the female mould part of Figure 1
  • Figure 3 is a perspective view of the two mould parts of Figures 1 and 2 in the closed position of the mould
  • Figure 4 is a section through the core part of Figure 2
  • Figure 5 shows part of the section of Figure 4 drawn to an enlarged scale
  • Figure 6 is a section through the mould when in its closed position.
  • the figures show a single core/cavity set for an injection-compression mould for making an article in the form of a drinking cup having a generally flat base, a frustro-conical side wall and a lip in the form of an inverted "U" surrounding the mouth of the cup.
  • -the -core -cavity/set may be.one. ⁇ of many in a multi-cavity mould and that the different sets can be arranged side by side and/or stacked back to back. The ensuing description will, however, be refer for simplicity to a single cavity mould.
  • the mould comprises a female mould part 10 and a core part 12 which fit into one another in the manner shown in Figure 3 to leave between them a mould cavity having the desired shape of the drinking cup to be moulded.
  • Injection-compression moulding does however present certain problems that are not encountered in conventional injection moulding.
  • the first of the problems is concerned -with the alignment of the mould parts.
  • conical mating surfaces are provided on the different parts of the mould which centre them relative to one another when the mould is fully closed.
  • the mould parts may not be fully aligned, that is to say they not be concentric or they may not be coaxial.
  • the guiding that is achieved by the tie bars, or other guiding systems used by machine manufacturers of the injection moulding machine, may not guarantee alignment to the required accuracy, especially when it is noted that the main purpose of using injection-compression moulding is to achieve very large flow length to thickness ratios in articles such as cups, margarine tubs or dustbins.
  • each of the guide fingers 14 has two parallel sided locating sections.
  • One pair of locating sections 14a is provided near the base of each guide finger 14 and the other pair 14b is provided at its free end.
  • the width of the locating sections 14a exceeds the width of the locating sections 14b.
  • the portion of each guide finger in between the locating sections 14a and 14b is shown as tapering gradually, but it may have any shape provided that its width never exceeds the width of the locating sections 14a.
  • Mating parallel locating sections 18a and 18b are provided as part of U-shaped recesses defined by inserts 18 similarly secures to the female mould part 10.
  • the mould parts that is not connected to the injection system usually the core part 12
  • the core part 12 is mounted in such a manner as to allow it a small degree of lost motion relative to its machine platen. Strong spring pressure is used to retain the mould part in position but, if sufficient force is applied to it, the mould part will move laterally.
  • the fingers and inserts may not mate perfectly with one another and this will apply a force to the core part to push it into alignment with the female mould part.
  • the parts of the mould are brought into perfect alignment with one another in the conventional manner.
  • the locating sections 14a and 14b will interact with the surfaces 18a and 18b before the mould is fully closed and will effect in two different and axially separated planes any minor relative displacement of the mould parts that is necessary to assure correct alignment of the mould parts both in terms of concentricity and parallel alignment before the mould is fully closed.
  • the guide fingers 14 and the inserts 18 ensure the concentricity of the mould parts at both ends of the mould cavity, they do so without the use of locating sections having an axial length matching that of the mould cavity. Instead, no force is applied to align the mould parts until the mould is nearly fully closed. This is important as it avoids excessive wear to the locating sections .
  • a further problem that has to be overcome in injection- compression moulding is that of containing the plastics material within the cavity as its volume is being reduced.
  • this has been achieved by using a rim closure ring to close off the cavity in the female mould part and by the core passing through a cylindrical hole in the rim closure ring.
  • This is not a satisfactory solution because it is difficult to form a rim closure ring with a cylindrical bore that effectively seals around the core and yet allows the core to pass freely through it.
  • the clearance required to permit reliable and free movement of the core relative to the rim closure ring does not permit creation of a perfect seal and results in an unacceptable witness line around the rim of the moulded article.
  • a sealing ring 20 surrounds the core 16.
  • the sealing ring is held captive on the core part 12 and is capable of only a small degree of movement relative to the core part in the direction of the axis of movement of the core part 12.
  • Strong springs (or gas pressure) capable of withstanding the pressure within the mould act to hold the sealing ring 20 against the top surface of the female mould part 10 so that no plastics material can escape laterally from the top of the mould cavity.
  • the sealing surface between the sealing ring 20 and the core 16 is not cylindrical, as in the prior art, but is formed of two contiguous tapering sections 22 and 24 of which the section 24 has a very small angle of taper, less than 5° and preferably of the order of 1°, and the section 22 has a larger angle of taper.. In both sections, sealing contact between the sealing ring 20 and the core 16 does not occur before the mould cavity is fully closed.
  • the core 16 is first fully advanced into the cavity in the female mould part 10 to exclude most of the air from the cavity. Next, an accurately measured quantity of plastics material is injected into the mould cavity to form a biscuit at the base of the mould cavity. During this time, the core recoils slightly from the female mould part either by the action of the injection pressure or by movement of the core cavity.
  • the sealing ring may or may not come into contact with the front of the female mould part before the recoiling movement commences depending on the maximum stroke of the ring and the thickness of the biscuit that is injected into the mould. If the sealing ring does contact the front of the female mould part, then depending on the stroke of the ring relative to the core and the amplitude of the recoiling movement, it may remain in sealing contact with the female mould part during the whole or only the initial part of the recoiling movement.
  • the core 16 is maintained in alignment with the female mould part by the action of the guide finger 14.
  • the axial movement of the core 16 relative to the sealing ring 20 opens a gap between the two because of the tapering sealing surfaces 22 and 24. However, because of the steepness of the angle of taper of the section 24, the width of the gap that is created is only wide enough to act as a vent to allow gas to escape from the cavity.
  • the biscuit of plastics material is compressed -and -is forced to flow up the side walls of .the cavity towards the rim of the container. During this time, gas is expelled from the mould cavity first through the gap between the sealing ring and the cavity then through the gap between the sealing ring 20 and the core 16. As the core reaches its end position, the gap between it and the sealing ring 20 is closed fully so as to prevent any egress of the plastics material from the mould.
  • the plastics material flows at an even rate around the entire periphery of the cavity and reaches the end of the cavity at substantially the same time. This reduces the distance that the sealing ring 20 needs to move relative to the core 16. It will noted that the sealing ring not only closes the mould cavity efficiently to avoid any flashing but it does so without rubbing against the core. Furthermore, the sealing ring provides a vent which decreases in cross sectional area as the core reaches the closed position. Thus, at the commencement of the compression stroke when air needs to be expelled from the cavity, the air can pass freely first between the sealing ring 20 and the cavity 10 then between sealing ring 20 and the core 16. This avoids high temperatures being reached in the vent and reduces air damping of the movement of the core. By the time the gap is finally sealed off, all the air will have been evacuated from the mould cavity and the seal will prevent any flashing of the plastics material.
  • the mould as described needs to be mounted in a moulding machine that moves the core and the female mould part relative to one another at the appropriate rate while applying appropriate pressures. It has been found that the pressure/distance profile of a toggle operated moulding machine is ideally suited to the injection compression moulding process but other machines can be programmed to achieve a similar pressure/distance profile. When a machine is not capable of changing smoothly from a low pressure large displacement mode to a high pressure small displacement mode, a further possibility would be to include a module between the mould and the machine platens that is capable of delivering the desired distance/pressure profile.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un moule destiné au moulage par compression à injection d'un article qui comprend une partie femelle (10) et une partie noyau (12) destinée à être montée en utilisation sur les platines d'une presse à injecter en vue d'un déplacement en direction l'un de l'autre et à distance de l'une de l'autre entre une position ouverte et une position fermée. Au moins une de ces parties est réglable par rapport à la platine associée de façon à permettre à ces parties d'être alignée axialement entre elles. Au moins trois doigts de guidage (14) sont prévus sur une des parties du moule et répartis autour de l'axe de du noyau destiné être reçu dans des évidements de formes complémentaires dans l'autre partie de moule lorsque les parties de moule approchent de la position complètement fermée. Chaque doigt (14) possédant deux parties mise en place latérale et parallèle (14a, 14b) qui sont espacés entre eux long de la longueur du doigt (14). La partie mise en place (14b) la plus proche de l'extrémité libre du doigt (14) est plus étroites que l'autre (14a) et la longueur de chacune de ces parties mise en place (14a, 14b) est au moins égale à la partie finale de la course des platines durant laquelle la compression des matières plastiques injectées se déroulent.
PCT/GB2004/005414 2004-01-16 2004-12-30 Moule de compression a injection avec organe de guidage Ceased WO2005068156A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0400935.3 2004-01-16
GB0400935A GB2410000B (en) 2004-01-16 2004-01-16 Injection Compression Moulding

Publications (1)

Publication Number Publication Date
WO2005068156A1 true WO2005068156A1 (fr) 2005-07-28

Family

ID=31726269

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/005414 Ceased WO2005068156A1 (fr) 2004-01-16 2004-12-30 Moule de compression a injection avec organe de guidage

Country Status (2)

Country Link
GB (1) GB2410000B (fr)
WO (1) WO2005068156A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2430641A (en) * 2005-10-03 2007-04-04 Im Pak Technologies Ltd Injection compresson impact moulding
ES2397752B1 (es) * 2011-08-05 2014-01-17 Bolexp Normalizados, S.L.U. Sistema centrador de molde.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH354939A (de) * 1961-04-18 1961-06-15 Ankerwerk Gebr Goller Verfahren zur Herstellung von Formkörpern aus thermoplastischen Massen
EP0203212A1 (fr) * 1985-05-28 1986-12-03 Letica Corporation Dispositif pour maintenir une épaisseur constante de paroi de récipients moulés en matière plastique
JPS62227715A (ja) * 1986-03-31 1987-10-06 Toyota Motor Corp 射出成形金型
US4856977A (en) * 1988-07-01 1989-08-15 Holdt J W Von Two stage mold centering system
EP0436750A1 (fr) * 1988-10-31 1991-07-17 Husky Injection Molding Systems Ltd. Dispositif anti collision pour un moule d'injection
FR2739582A1 (fr) * 1995-10-09 1997-04-11 Masky Aomar Prerecentreur coaxial pour moule et outil

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29802231U1 (de) * 1998-02-10 1998-04-23 B & R Entwicklungs- und Konstruktionsgesellschaft mbH, 35576 Wetzlar Vorrichtung zum Spritzgießen oder Stanzen
NZ526988A (en) * 2001-01-26 2005-01-28 Im Pak Technologies Ltd Metering device for a plastics moulding machine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH354939A (de) * 1961-04-18 1961-06-15 Ankerwerk Gebr Goller Verfahren zur Herstellung von Formkörpern aus thermoplastischen Massen
EP0203212A1 (fr) * 1985-05-28 1986-12-03 Letica Corporation Dispositif pour maintenir une épaisseur constante de paroi de récipients moulés en matière plastique
JPS62227715A (ja) * 1986-03-31 1987-10-06 Toyota Motor Corp 射出成形金型
US4856977A (en) * 1988-07-01 1989-08-15 Holdt J W Von Two stage mold centering system
EP0436750A1 (fr) * 1988-10-31 1991-07-17 Husky Injection Molding Systems Ltd. Dispositif anti collision pour un moule d'injection
FR2739582A1 (fr) * 1995-10-09 1997-04-11 Masky Aomar Prerecentreur coaxial pour moule et outil

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"DOUBLE MOLD INTERLOCK FOR THINWALL PARTS", MODERN PLASTICS INTERNATIONAL, MCGRAW-HILL,INC. LAUSANNE, CH, vol. 13, no. 6, June 1983 (1983-06-01), pages 16, XP001172730, ISSN: 0026-8283 *
ATZERODT W: "HOCHLEISTUNGS-SPRITZGUSS EINE MOEGLICHKEIT ZUR RATIONELLEN HERSTELLUNG DUENNWANDIGER EINWEGVERPACKUNGEN", PLASTVERARBEITER, ZECHNER UND HUETHIG VERLAG GMBH. SPEYER/RHEIN, DE, vol. 27, no. 8, August 1976 (1976-08-01), pages 413 - 420, XP001176225, ISSN: 0032-1338 *
N. N.: "Das Spritzgiesswerkzeug - Die Spritzgiessverpackung", 21 March 2002, VDI-VERLAG, DÜSSELDORF, XP002325064 *
PATENT ABSTRACTS OF JAPAN vol. 012, no. 087 (M - 678) 19 March 1988 (1988-03-19) *

Also Published As

Publication number Publication date
GB0400935D0 (en) 2004-02-18
GB2410000B (en) 2007-04-11
GB2410000A (en) 2005-07-20

Similar Documents

Publication Publication Date Title
KR100553165B1 (ko) 금형장치, 금형장치를 갖는 성형기
CN1282535C (zh) 一种模塑工艺
JP2010515602A (ja) 射出成形金型及び射出成形方法
EP2996850B1 (fr) Système de moulage par injection à pression constante faible doté de cavités de moulage à position variable
EP1632330A1 (fr) Procede et machine de moulage, matrice et article moule
KR102531823B1 (ko) 조정식 코어 센터링 디바이스를 구비한 사출 성형 공구
US20060286916A1 (en) Injection compression moulding
CN110667046B (zh) 一种橡胶膜片生产模具
CN210061978U (zh) 一种顶出式塑料杯吹塑成型模具
CN115157567A (zh) 一种注塑机用多孔位旋转注塑模具
WO2005068156A1 (fr) Moule de compression a injection avec organe de guidage
US7686610B2 (en) Mold and method for the manufacture of holders such as tub-shaped containers
US12011855B2 (en) Method and mould for making holed objects from plastic material
US12415299B2 (en) Mould for the production of closures in compression moulding machines
JP5074486B2 (ja) 成形品圧縮成形装置
CN103747936A (zh) 一种脱模套
CN107443687A (zh) 一种具有收缩变形控制的空调注塑件注塑模具及注塑方法
CN101304864A (zh) 注射冲击压缩模制
CN210190462U (zh) 一种具有气动顶出以及推环的注塑模具
CN210283005U (zh) 食品级双色塑料制品二次成型注塑模具
CN207240734U (zh) 一种具有收缩变形控制的空调注塑件注塑模具
CN218906174U (zh) 一种具有防漏结构的注塑模具
CN109366882B (zh) 一种用于制造杯架翻盖的模具

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 1797/DELNP/2004

Country of ref document: IN

AK Designated states

Kind code of ref document: A1

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): BW GH GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

122 Ep: pct application non-entry in european phase