EP0227703A1 - Procede et appareil de fabrication d'articles ou de pieces faconnees a partir d'une feuille en materiau plastique orientable - Google Patents

Procede et appareil de fabrication d'articles ou de pieces faconnees a partir d'une feuille en materiau plastique orientable

Info

Publication number
EP0227703A1
EP0227703A1 EP86903169A EP86903169A EP0227703A1 EP 0227703 A1 EP0227703 A1 EP 0227703A1 EP 86903169 A EP86903169 A EP 86903169A EP 86903169 A EP86903169 A EP 86903169A EP 0227703 A1 EP0227703 A1 EP 0227703A1
Authority
EP
European Patent Office
Prior art keywords
plate
band
dies
plastic
die
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Withdrawn
Application number
EP86903169A
Other languages
German (de)
English (en)
Inventor
Jean-Marie Mathias
Alphonse Heremans
Jean Kersten
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.)
Baxter International Inc
Original Assignee
Baxter International Inc
Baxter Travenol Laboratories Inc
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
Priority claimed from BE0/215194A external-priority patent/BE902666A/fr
Application filed by Baxter International Inc, Baxter Travenol Laboratories Inc filed Critical Baxter International Inc
Publication of EP0227703A1 publication Critical patent/EP0227703A1/fr
Withdrawn legal-status Critical Current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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/44—Removing or ejecting moulded 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • B29C51/082—Deep drawing or matched-mould forming, i.e. using mechanical means only by shaping between complementary mould parts
    • 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
    • B29L2016/00—Articles with corrugations or pleats
    • 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
    • B29L2031/703—Bellows

Definitions

  • This invention relates to a process and to an apparatus for the manufacture of shaped pieces or articles from a plastic sheet or film, said plastic material having some degree of crystallinity and being therefore orientable when it is subjected to stretching or tensile forces.
  • Plastic materials which may be used whithin the scope of this invention are, for example, polypropylene or polyesters, such as polyethylene terephthalate.
  • the pieces or articles manufactured by the process and by means of the apparatus according to this invention may have various shapes , such as the shape of cups, the shape of discs provided with concentrical pleats and forming a flat bellow piece or generally the shape of circular or polygonal articles having portions which are raised and/or lowered with respect to their central plane.
  • thermoforming It is also known to manufacture plastic shaped pieces or articles by thermoforming.
  • plastic materials having a well de- fined melting point such as polypropylene
  • the thermo ⁇ forming process requires a very precise control of the temperature at which the plastic material is molded, so that an expensive equipment is needed.
  • even very small variations of the temperature of the surface of the articles made by thermoforming cause important variations of the thickness of said articles, the flui ⁇ dity of the plastic material being very dependent on the temperature which is applied thereto.
  • the percentage of wastes i.e. of defec ⁇ tive articles is frequently important, even when using a thermoforming apparatus equipped with expensive means for adjusting and distributing the preparation to which the plastic material, for example in the form of a sheet or strip, is subjected during the thermoforming step.
  • th process according to this invention does not need an heating of the plastic material and that the resul obtained by this process only depend on mechanica parameters which can be more easily controlled than th temperature, these parameters being, among others, th form of the used dies and the molding speed.
  • the process fo manufacturing shaped articles or pieces from a sheet o film of a plastic material having some degree o crystallinity, by permanent local deformation of sai plastic sheet or film by means of two dies havin complementary profiles is essentially characterized b the fact that it comprises the following steps :
  • the plastic sheet is immobilized by pressin together two plates which support each one of sai dies and between which the plastic sheet i located, so that the opposite surfaces of sai sheet is firmly squeezed between said plates i the area or areas of the sheet where n deformation must occur ;
  • the plastic sheet is locally stamped by causing an interpenetration of the dies, between which are located the areas of the immobilized sheet which must be deformed, by moving at least one of said dies with respect to its support plate, so as to stretch and orient the plastic sheet beyond its elastic limit in the areas of the sheet which are deformed by the dies ;
  • the plastic sheet is preferably a continuous band which is moved step by step from a supply source consisting in a roll or reel delivering such a plastic band.
  • one of the plates supporting a die is maintained in a fixed position, whereas the other plate supporting the other die is movable with respect to the first plate, at least one of dies being movable with respect to its support plate against the action of springs.
  • the apparatus for carrying out the process according to the invention is essentially characterized by the fact that it comprises a device for stamping a sheet or band of plastic material, this device compri ⁇ sing a first movable plate, to which is fixed a first die, and a second composite plate which is parallel to the first plate and to which is fixed a second die having a profile which is complementary to that of the first die, the composite plate comprising a fixed base part to which the second die is fixed and a movable part elastically supported by the fixed base part, means being provided for moving the plates supporting the dies toward and away from each other.
  • Each die is preferably provided, on the profiled side, with a central bore which opens into the face of the die contacting the plastic sheet, a core subjected to the action of a spring being mounted in said bore, so as to be able to move therein on a distance limited by a stop.
  • the composite plate comprises preferably a first fixed base plate to which a die is fixed and which supports elastically a movable plate, one face of which is intended to contact one face of the plastic sheet or band.
  • the movable plate is connected to the first plate by rods having one end fixed to the movable plate and the other end of which carries a head which is slidable in a bore of the lower plate against the action of springs .
  • These springs may be helical springs or
  • Belleville discs bearing, on the one hand, against the base plate and, on the other hand, against the movable plate.
  • the apparatus comprises a source for the supply of a continuous band of plastic material, a supporting table on which said continuous band is moved forward, a stamping device as defined hereabove, a device for causing the plastic band to advance step by step and a device for cutting shaped pieces or articles from said band downstream the stamping device.
  • Fig 1 is a schematic side elevation of an apparatus for the manufacture of shaped pieces or articles from a sheet or band of plastic material ;
  • - Fig 2 is a section showing the stamping device in the open position ;
  • - Fig 3 is a section showing the stamping device in the closed position ;
  • Fig 4 is a view of the stamping device in the direction of arrow X in fig. 3 ;
  • Figs 5 and 6 show, respectively in cross-section and plane view, an example of a shaped article manufactured by the process according to the inven ⁇ tion, and
  • Fig 7 shows a plastic band in which articles have been made by stamping, at the outlet of the stamping device and before these articles are separated from the band by punching.
  • the apparatus shown in fig. 1 comprises a source 1 for supplying a band of plastic material having some degre of crytallinity, such as a polypropylene band, which may, for example, have a width of 75 mm and a thickness of 200 to 300 microns.
  • the supply source may be a reel from which the band of plastic material 3 is unrolled, said reel 1 having a rotating core 3, the ends of which are supported by known means (not shown).
  • the band of plastic material 2 which leaves the reel 1 passes onto cylinders 4, between which it forms a downwardly directed loop. This loop is formed by means of a ring 5 having a large diameter, which is applied, under its own weight, on the band and is maintained in a vertical position between two paral ⁇ lel walls (not shown).
  • the plastic band passes through the stamping device 6, whereafter the band in which shaped pieces or articles have been formed advances onto the longitudinal supporting table 7 which may be provided with side guides (not shown).
  • a device 8 is provided for causing the plastic band 7 to advance step by step in the direction of arrow Y, so that said band 2 remains stationary in the stamping device 6 during the time (4 or 5 seconds) which is necessary for shaping the arti ⁇ cle, which may be a cup or an article comprising a multiplicity of concentric plies, as explained herein ⁇ after.
  • a punching or cutting device 9 is used for separating the shaped articles from the plastic band, these articles being collected in a container 10 located below the table 7.
  • the plastic band 2 wherein holes are provided at the places where the articles have been removed therefrom by cutting or punching is collected in a second container 11.
  • the perforated plastic band may be wound on a band or bobbin which may be caused to rotate by means of a winding device subjected to an intermittent rota ⁇ tion, the latter device replacing then the device 8.
  • the stamping device 6 comprises essentially an upper plate 12 which is movable in the direction of arrows Z.
  • This plate 12 has preferably a rectangular shape and has a width which slightly exceeds that of the plastic band 2.
  • This upper plate 12 has a central part 13 having a smaller thickness than its peripheral part 14, so that a downwardly open cavity is formed in said plate 12.
  • An upper die 15 is removably fixed by screws 16 to the central part 13 of the upper plate.
  • the upper die 15 may have a cylindrical or polygonal (for example a square or rectangular) shape, according to the form to be given to the article to be obtained in the plastic band 2.
  • the latter is provided with a central bore 17.
  • This bore comprises an upper part 18 having a larger diameter than a lower part 19.
  • This bore 17 comprises an upper part 18 having a larger diameter than a lower part 19, this bore 17 having thus a circular flange 20.
  • a sliding cylindrical core 21 is located in the bore 17. The functions of this core 21 will be explained later.
  • the core 21 has a head 22 having a larger diameter than the remaining part or shank 23 of said core 21.
  • a spring 24 bears, on the one hand, on the central part 13 of the upper plate 12 and, on the other hand, on the head 21 of the core 21, so that this core 21 is permanently urged downwardly, the downward movement of the core 21 being limited by the circular flange 20 on which the head 22 of said core 21 bears, when the spring 24 is allowed to act fully.
  • the upper die 15 is provided with a series of projections 25 separated from each other by recesses 26 forming the profiled or shaped part of said upper die 15.
  • the stamping device comprises a lower composite plate 27 which is parallel to the upper plate 12 and has also preferably a square or rectangular shape.
  • This lower composite plate 27 comprises a fixed plate 29 and a upper plate 30, the upper plane face of the lower plate 29 being applied against the lower plane face of the upper plate 30. Screws 31 (for example four screws) maintain the plates 29, 30 fixed or attached to each other.
  • a lower die 33 is fixed by means of screws 32 to the upper plate 30, the upper face of said lower die 33 having a profile which is complementary to that of the lower face of the upper die 15.
  • the lower die 33 has a central bore 37 which comprises a lower part 38 having a larger diameter than an upper part 39, a flange 40 being provided between said parts 38, 39.
  • a sliding cylindrical core 41, cooperating with the core 21 is placed within the bore 37.
  • the core 41 has a head 42 of a larger diamater than the remaining part or shank 43 of said core 21.
  • a spring 44 bears, on the one hand, against a central part 45 of lower thickness of the peripheral part 46 of the upper plate 30, and, on the other hand, on the head 42 of the core 41, so as to urge permanently said head against the flange 40 of the bore 37.
  • the upward sliding of the core ' 41 is thus limited by the flange 40 of the cylindrical bore 37.
  • the lower composite plate 27 comprises also a movable plate 47 carried by rods 48 which are screwed therein (49) and are each provided with a cylindrical head 50 which is slidable in coaxial bores 51 provided in the plates 29, 30 which constitute the lower fixed part 28 of the stamping device 6.
  • a plurality of Belleville springs 52 surround each rod 48, said springs 52 bearing, on the one hand, on the lower face 53 of the movable plate 47 and, on the other hand, on the upper face 54 of the fixed plate 30.
  • Belleville springs 52 instead of superimposed Belleville springs 52, helical springs may of course be used.
  • the stroke of the rods 48 is limited by a circular recess or flange 55 provided in the bores 51, the latter having a part of larger diameter 56 opening into the lower face 57 of the lower fixed plate 29 and the other end of said bores 51 opening in the upper face 54 of the upper fixed plate 30.
  • the stamping device is shown in the open position, i.e. in the position in which its upper plate 12 and the upper die 15 are distant from the lower composite plate 27 and from the lower die 15 during one step of the intermittent advancing movement of the plastic band 2 in the direction of arrow Y.
  • the upper plate 12 is lowered by a mechanical device (such as a piston or a cam) or by a pneumatic or hydraulic device (such as a jack) so that the plastic band 2 is firmly pressed and immobilized between, on the one hand, the lower face 59 of the upper plate 12, the projections 25 of the upper die 15 and the free end 60 of the upper core 21 and, on the other hand, the upper face 61 of the movable plate 47 of the lower composite plate 27 and the free face 62 of the lower core 41.
  • a mechanical device such as a piston or a cam
  • a pneumatic or hydraulic device such as a jack
  • the faces 59, 60, 61, 62 have preferably a high friction coefficient, so as to inhibit any sliding of the plastic band 2 pressed between them, during the stamping operation.
  • These faces 59 to 62 are preferably made of stainless steel.
  • the plastic band 2 is locally subjected to a permanent deformation, at these interpenetration places, so that concentric circular grooves 63 alternating with concen ⁇ tric circular projections 64 are formed therein.
  • the side walls 65 of the grooves 63 and of the projections 64 are stretched during the interpenetration of the dies 15 and 33, so that the thickness of said side walls 65 is slightly diminished (as shown in fig. 5), said stretching exceeding the elastic limit of the plastic material, so that the latter becomes oriented.
  • the cores 21 and 41 which had been pushed back in their respective bores 17 and 37, against the action of the springs 24 and 44 are released, when the upper die 15 and the lower die 33 are moved away from each other. Under these circumstances, the cores 21 and 41 are pushed by their respective springs 23,44 toward the outside of their bores 17, 37 and eject the stamped article 66.
  • the cores 21 and 41 have two functions : on the one hand, they are used for immobilizing and centering the articles 66 during the stamping thereof and, on the other hand, they act as ejector ' s after the stamping operation.
  • the device 8 causes the plastic band to advance by a step, the length of which slightly exceeds the diameter of a shaped piece. A new shaped piece can then be formed by a further stamping operation. Down ⁇ stream the stamping device 6, the plastic band 2 appears as shown in fig. 7, said band carrying a series of shaped articles which can be separated therefrom by a cutting operation at station 9.
  • the shaped article 66 is a small disc having circu ⁇ lar concentric grooves 63 alternating with circular concentric projections in zigzag form. This disc can be easily deformed by applying a pressure upon its central plane part 68.
  • This shaped article may, for example, form the bottom of a plastic container and may be welded by its peripheral edge 67 to the side walls of said container.
  • This container may itself contain a bottle containing a pharmaceutical product and having a pierca- ble neck.
  • the components of the stamping device may be in a vertical position instead of an horizontal posi ⁇ tion.
  • the plastic band to be stamped follows a vertical path upstream and downstream of this stamping device, as well as within this device.
  • the stamping device contained in the appara ⁇ tus according to this invention may also comprise more than a pair of dies, so as to enable the stamping, during one step, of several pieces on the width or length of the plastic band.
  • the apparatus according to this invention may be used for forming, by a stamping operation, pieces having forms and arrangements which are different from those of the article shown in figures 5 and 6.
  • the dies 15 and 33 shown in figures 3 and 4 may indeed be easily replaced by dies having other profiles than those designated by references 25,26 - 35,36, for enabling the stamping of different articles.
  • the use of the process and of the apparatus according to the present invention has shown that it is possible to obtain from a very thin film or sheet of orientable plastic material, with a capital investment substantially lower than that needed for the thermoforming process , shaped pieces which are free from defects, these pieces being formed at very precise identical distances (constant interaxis distance A - A ; see fig.7), so as to allow a correct stamping of the pieces.
  • the process and apparatus according to the invention thus allow the production, at a very quick cadence, of inexpensive articles having a better quali ⁇ ty than those which can be obtained by the thermoforming process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

Les articles façonnés sont fabriqués à partir d'une fine bande (2) de matériau plastique orientable par estampage de la bande entre deux matrices (15, 33) ayant des profils complémentaires, lesdites matrices étant véhiculées par des plaques parallèles (6, 26) dont l'une au moins est mobile par rapport à l'autre, de sorte à comprimer la bande de plastique autour de la zone devant être estampée ou emboutie. Une (27) des plaques (6, 27) comprend une partie fixe (29, 30) à laquelle est fixée une (33) des matrices (15, 33) et qui sert de support élastique à une plaque mobile (47) s'associant avec une (6) des plaques (6, 27) pour comprimer la bande de plastique durant l'interpénétration des matrices (15, 33) qui déforment en permanence localement la bande de plastique.
EP86903169A 1985-06-17 1986-06-16 Procede et appareil de fabrication d'articles ou de pieces faconnees a partir d'une feuille en materiau plastique orientable Withdrawn EP0227703A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE0/215194A BE902666A (fr) 1985-06-17 1985-06-17 Procede et appareil pour la fabrication de pieces ou objets faconnes a partir d'une feuille en matiere plastique orientable.
BE215194 1985-06-17

Publications (1)

Publication Number Publication Date
EP0227703A1 true EP0227703A1 (fr) 1987-07-08

Family

ID=3843901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86903169A Withdrawn EP0227703A1 (fr) 1985-06-17 1986-06-16 Procede et appareil de fabrication d'articles ou de pieces faconnees a partir d'une feuille en materiau plastique orientable

Country Status (5)

Country Link
EP (1) EP0227703A1 (fr)
JP (1) JPS62503086A (fr)
AU (1) AU5967386A (fr)
WO (1) WO1986007563A1 (fr)
ZA (1) ZA864507B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6783211B2 (en) * 1998-12-25 2004-08-31 Matsushita Electric Industrial Co., Ltd. Ink-jet recording head
US7156502B2 (en) 1999-03-26 2007-01-02 Dimatix, Inc. Single-pass inkjet printing

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4865791A (en) * 1988-02-03 1989-09-12 The Excello Specialty Company Method of forming a surface protector with an expansible pocket
EP0468743A1 (fr) * 1990-07-24 1992-01-29 Universal Filtration (Proprietary) Limited Réalisation d'éléments filtrants
WO2010042227A1 (fr) * 2008-10-10 2010-04-15 Tosoh Smd, Inc. Mécanisme d'emboutissage de rainures circulaires et procédé de production de cibles de pulvérisation
CN114347438B (zh) * 2022-01-18 2024-05-07 浦江德丰机械科技有限公司 自动化水钻烫钻吸塑机
TWI864920B (zh) * 2023-07-31 2024-12-01 日商阿爾發系統股份有限公司 沖壓裝置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1062429B (de) * 1955-11-02 1959-07-30 Auto Union Gmbh Vorrichtung zum Auswerfen von Kunststoffpressteilen aus Presswerkzeugen
US3444589A (en) * 1965-11-29 1969-05-20 Richard E Bowin Apparatus for forming sheet material to provide three-dimensional shapes
BE787219A (fr) * 1971-08-11 1973-02-05 Shell Int Research Articles en matiere plastique moulee
US3880561A (en) * 1974-01-23 1975-04-29 Richard A Ferro Brassiere mold-forming machine
GB1516766A (en) * 1975-10-03 1978-07-05 Peerless Mach & Tool Corp Cold-forming sheet material
US4228121A (en) * 1978-11-06 1980-10-14 Peerless Machine & Tool Corporation Method and apparatus for forming multiple thickness bead
US4302415A (en) * 1979-04-16 1981-11-24 Creative Industries, Inc. Method of forming foam articles from a foam thermoplastic web

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8607563A1 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6783211B2 (en) * 1998-12-25 2004-08-31 Matsushita Electric Industrial Co., Ltd. Ink-jet recording head
US7156502B2 (en) 1999-03-26 2007-01-02 Dimatix, Inc. Single-pass inkjet printing

Also Published As

Publication number Publication date
AU5967386A (en) 1987-01-13
ZA864507B (en) 1987-02-25
WO1986007563A1 (fr) 1986-12-31
JPS62503086A (ja) 1987-12-10

Similar Documents

Publication Publication Date Title
US3964237A (en) Apparatus for the production of a product filled container
RU2359827C2 (ru) Формование контейнеров
US2891280A (en) Method and apparatus for forming hollow plastic articles
US3081491A (en) Molding machine
RU2220048C2 (ru) Непрерывный экструзионно-штамповочный формовочный процесс для изготовления оптических изделий
US6086800A (en) Thermoforming process and apparatus
SU1083901A3 (ru) Установка дл изготовлени полых изделий из полимерных материалов
US20030168782A1 (en) Biaxial stretch blow molding method and apparatus for wide-mouthed containers
JPS6212012B2 (fr)
RU95122459A (ru) Способ перфорирования гладких закрытоячеистых поверхностей открытопористых пенопластовых листов и устройство для его осуществления
KR0151615B1 (ko) 박막 성형품의 성형방법 및 성형장치
US4861542A (en) Rotary blow molding method
EP0180524A2 (fr) Dispositif de moulage par étirage-soufflage pour des récipients en forme de gobelets
EP0227703A1 (fr) Procede et appareil de fabrication d'articles ou de pieces faconnees a partir d'une feuille en materiau plastique orientable
NL9002610A (nl) Werkwijze voor het vormen van de rand van een houder van thermoplastisch kunststofmateriaal en inrichting voor het toepassen van deze werkwijze.
US4480979A (en) Stretch forming hollow articles
US5773540A (en) Mold assembly for thermo-forming machine
US4288401A (en) Thermoplastic forming process
JP4391833B2 (ja) プラスチック製品の圧縮成型のための装置
US3669606A (en) Apparatus for forming protrusions with enlarged head portions in thermoplastic sheet material
JPS61172721A (ja) 連続熱成形機によつてフオームプラスチツクのフオイルで形成されるトレーの内表面にしぼ押するためのしぼ押装置
US4005164A (en) Method of making plastic containers
KR100298680B1 (ko) 기록매체를제조하는설비
US3650655A (en) Apparatus for forming and stacking container lids
US3505705A (en) Apparatus for production and filling of flangeless plastic containers

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

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19870216

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BAXTER INTERNATIONAL INC. (A DELAWARE CORPORATION)

17Q First examination report despatched

Effective date: 19900212

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19900625

RIN1 Information on inventor provided before grant (corrected)

Inventor name: HEREMANS, ALPHONSE

Inventor name: KERSTEN, JEAN

Inventor name: MATHIAS, JEAN-MARIE