EP1410845A2 - Pipette de laboratoire comportant une tresse de fils de fibres synthétiques entrelacés d'une couleur correspondant à au moins une caractéristique de la pipette - Google Patents
Pipette de laboratoire comportant une tresse de fils de fibres synthétiques entrelacés d'une couleur correspondant à au moins une caractéristique de la pipette Download PDFInfo
- Publication number
- EP1410845A2 EP1410845A2 EP03356150A EP03356150A EP1410845A2 EP 1410845 A2 EP1410845 A2 EP 1410845A2 EP 03356150 A EP03356150 A EP 03356150A EP 03356150 A EP03356150 A EP 03356150A EP 1410845 A2 EP1410845 A2 EP 1410845A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- pipette
- braid
- piece
- characteristic
- laboratory
- 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.)
- Granted
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/14—Process control and prevention of errors
- B01L2200/141—Preventing contamination, tampering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/02—Identification, exchange or storage of information
- B01L2300/021—Identification, e.g. bar codes
Definitions
- the invention relates to the technical field of laboratory instruments, in particular laboratory pipettes, in particular disposable pipettes for unique, used in biological laboratories, medical analyzes, serology, immunology, microbiology or industrial laboratories ...
- the European patent EP 261 023 proposes a laboratory pipette of the type comprising means of characterization allowing a user to identify immediately and without error the maximum or nominal volume of the pipette, characterized in that the means of characterization consist of at least one piece of colored matter whose color is the maximum or nominal volume of the pipette and is inserted in the suction end of the pipette.
- the piece of colored material constitutes reliable characterization means, very low cost, visible from outside by the user in any circumstance, while remaining safe from external aggression.
- a color code in accordance with the standard in a one-to-one relationship with the maximum or nominal volumes of Common pipettes is used. This standard specifies, for example, that pipettes 1 ml are characterized by yellow, those of 2 ml by green, those of 5 ml by the blue, those of 10 ml by the orange, those of 25 ml by the red ....
- the piece of colored material used is preferably made of fibrous material or hydrophobic cell, especially wood viscose, cellulose, cotton or other.
- the dimensions of the piece of colored material are adapted according to the diameter of the suction end of the pipette, so that it can be inserted and himself by simple contact with the walls. In use, it has been found that wood or cotton colored viscose buffer used tends to fray and that elementary fibers may then fall into the aspirated liquid. It would therefore be desirable to remove these risks of contamination.
- the fibrous buffers used are in the form of small cylinders of material whose diameter has certain irregularities. Variations of the diameter of the fibrous piece influence the rate of flow of the pipetted liquid obtained.
- the subject of the present invention is an improvement of laboratory pipettes already known, these pipettes have to present the properties mentioned above and in addition to guaranteeing any risk of contamination of the liquid at pipette.
- Another object of the invention is to provide pipettes provided with a piece of fibrous material, also called stamp, ensuring their identification fast, this buffer having to present a good cohesion after implementation in the pipette and a reduced tendency to fraying.
- the buffer used in this invention is further characterized by the great regularity of its diameter and its porosity, which makes it possible to obtain a regular flow of liquid.
- the invention relates to a laboratory pipette consisting in particular of a transparent tube having a liquid withdrawal end and a suction end into which is inserted a piece of fibrous material of a color corresponding to at least one characteristic of the pipette and in particular its nominal volume.
- the piece of fibrous material is in the form of a braid of intertwined synthetic fiber yarns, said braid being folded so that that the fold thus formed is positioned towards the inside of the pipette.
- the subject of the invention is also a method for identifying at least one characteristic, and in particular the nominal volume of a laboratory pipette consisting in particular of a transparent tube comprising an end of sampling of a liquid and a suction end comprising the insertion of a piece of fibrous material whose color corresponds to the characteristic identifiable pipette.
- a laboratory pipette consisting in particular of a transparent tube comprising an end of sampling of a liquid and a suction end comprising the insertion of a piece of fibrous material whose color corresponds to the characteristic identifiable pipette.
- it is used as piece of fibrous material, a braid of intertwined synthetic fiber yarns, that it is folded before insertion and that is inserted into the suction end, so that that the fold thus formed is positioned towards the inside of the pipette.
- Fig. 1 represents an example of a pipette according to the invention.
- Fig. 2 represents, on a larger scale, an example of braided fibrous pads that can be used in the pipettes of the invention.
- Figs. 3 and 4 show other suitable braiding variants.
- Fig. 5 is a table giving different characteristics of braided pads used in pipettes according to the invention.
- FIG. 1 illustrates by way of non-limiting example a pipette 1 according to the invention for taking a precise volume of a chemical or biological liquid.
- a tube 3 is extended at one of its ends into a tube of the same or smaller diameter through which the liquid is either removed or discharged from the pipette, this end is called the sampling end 4 .
- the tube 3 is extended into another tube whose diameter, depending on the volume of the pipette, is identical to the diameter of the tube 3 or lower as shown in FIG. 1 .
- This end, through which gases are drawn or expelled is appointed suction end 5.
- the tube 3 has in its main part graduations 6 located outside the tube.
- a piece of fibrous material 2 is trapped inside the suction end 5 of the pipette, preferably in a remote part of any graduation or registration.
- the fibrous piece 2 is made of synthetic fibers, preferred to the natural fibers of the cotton or wood viscose type which can cause cutting problems and also to influence the pipetting operation, when, unfortunately, the liquid to be pipetted comes into contact of the fibrous piece.
- the fibers of animal or natural origin have the risk of contaminating the liquids to be taken and thus to falsify the analyzes.
- the use of synthetic fibers makes it possible to limit the deteriorations of the chemical and / or biological liquids taken, if the latter came into contact with or near the fibrous piece 2 by a manipulation error.
- a buffer of hydrophobic synthetic fibers will be used. Hydrophobic means a material that does not retain water.
- this buffer loses its characteristics especially for the regulation of the flow and, on the other hand, that liquid is retained in the buffer and thereby changes the pipetted volume.
- the fibrous piece used is made of a sterile material that is inert with respect to different biological or chemical liquids to be taken, in case these liquids would come into contact with said fibrous piece during the pipetting operation.
- the fibrous piece 2 according to the invention is inserted in a folded form.
- the fibrous piece in braid form is folded on itself so as to form a fold extending transversely to the longitudinal axis of the braid.
- the braid is folded into two equal parts and then inserted by first entering the tube forming the end 5, the fold 2 1 .
- the ply 2 1 formed is located not on the side of the open end of the suction end 5 but to the side of the main part of the tube 3.
- this folding provides a spring effect reinforcing maintaining the fibrous piece 2 inside the suction end 5.
- the fibrous piece is present in the form of a braid.
- Braid means an interlacing of at least three fiber yarns synthetic.
- the thread consists of many filaments grouped together, the filaments that can be defined as very small diameter threads. Each thread contains, for example, 128 filaments.
- the braid will consist for example of 4, 8 or 16 intertwined threads. The used threads to be textured. The characteristics of the braid must be chosen so as to leave pass the gases to allow the aspiration and the evacuation of the liquid taken. By therefore, the braided fibrous piece must not constitute a hermetic stopper for the laboratory pipette. Braiding is chosen according to the speed flow of the desired liquid, this braiding determines the porosity of the fibrous piece and therefore its ability to let in air, which conditions the flow rate of the liquid obtained as a function of the fill rate of the pipette.
- braiding named half-occupation, tandem occupation, or preferably, normal occupation as shown respectively in FIGS. 3, 4 and 2 .
- These types of braiding are well known to those skilled in the art and are obtained according to conventional braiding techniques.
- Braiders 8 or 16 spindles may, for example, be implemented.
- colored buffer size 2 are adapted according to the diameter of the tube 3 at its suction end 5, so that the latter can be inserted and stuck to itself in the end, by simple contact with the internal walls.
- the number of threads present in the braid will be a function of the diameter of the fibrous pad.
- the braid will comprise for example 16 threads and for smaller diameters, for example 4 threads.
- the number of wires and the characteristics of the braid are chosen according to the nominal volume of the pipette, in order to obtain a similar flow rate irrespective of the volume of the pipette.
- the skilled person will be able to choose the characteristics of the braid according to the nominal volume of the pipette, the diameter of the suction end 5 and in particular flow velocity. These characteristics are, in particular, the diutage - number of meshes or round-trip existing on a centimeter of braid - the titration of the threads, the weight per linear meter of the braid.
- the table presented Fig. 5 gives, without limitation, the characteristics of the braids that can be used according to the nominal volume of the pipette.
- the braid is colored, each chosen color corresponding to a value of one characteristic of the pipette and in particular its nominal volume.
- the current The subject of the invention is therefore a method for identifying at least one characteristic, and in particular the nominal volume of a pipette.
- the choice of diameter and the braiding density of the piece of fibrous material used makes it possible to obtain the desired flow rate for the liquid contained in the pipette during its use.
- Such braids are tinted in mass and therefore present a great homogeneity in the dyeing.
- Polypropylene fibers are particularly suitable for mass dyeing, that is to say carried out before the development of son.
- the dye used is of the type resistant to light, liquids and different types sterilization. We can use different dyes that hang perfectly synthetic fibers and in particular polypropylene.
- the fibrous piece 2 is inserted in a simple way inside a laboratory pipette, such as that shown in FIG. 1 , after being previously folded.
- the assembly is then packaged and sterilized, for example with ethylene oxide followed by rinsing with air or with nuclear radiation.
Landscapes
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Analytical Chemistry (AREA)
- Devices For Use In Laboratory Experiments (AREA)
- Sampling And Sample Adjustment (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Pens And Brushes (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims (11)
- Pipette (1) de laboratoire constituée notamment d'un tube (3) transparent comportant une extrémité (4) de prélèvement d'un liquide et une extrémité (5) d'aspiration dans laquelle est inséré un morceau (2) de matière fibreuse d'une couleur correspondant au moins à une caractéristique de la pipette, notamment à son volume nominal, caractérisé en ce que le morceau (2) de matière fibreuse se présente sous la forme d'une tresse de fils de fibres synthétiques entrelacés, ladite tresse étant pliée de façon à ce que le pli (21 ) ainsi formé soit positionné vers l'intérieur de la pipette.
- Pipette (1) de laboratoire selon la revendication 1, caractérisée en ce que la tresse présente un tressage d'occupation normale.
- Pipette (1) de laboratoire selon la revendication 1 ou 2, caractérisée en ce que la tresse comporte 4, 8 ou 16 fils entrelacés.
- Pipette (1) de laboratoire selon la revendication 1 à 3, caractérisée en ce que la tresse présente un poids au mètre linéaire compris entre 0,5 et 4,5 g/m.
- Pipette (1) de laboratoire selon la revendication 1 à 4, caractérisée en ce que la tresse est en polypropylène.
- Procédé pour identifier au moins une caractéristique, et en particulier le volume nominal d'une pipette (1) de laboratoire constituée notamment d'un tube (3) transparent comportant une extrémité (4) de prélèvement d'un liquide et une extrémité (5) d'aspiration comprenant l'insertion d'un morceau (2) de matière fibreuse dont la couleur correspond à la caractéristique identifiable de la pipette (1),
caractérisé en ce que l'on utilise en tant que morceau (2) de matière fibreuse, une tresse de fils de fibres synthétiques entrelacés, que l'on plie avant insertion et que l'on insère dans l'extrémité d'aspiration, de façon à ce que le pli ainsi formé soit positionné vers l'intérieur de la pipette. - Procédé selon la revendication 6, dans lequel la vitesse d'écoulement du liquide à prélever est régulée notamment par le choix du nombre de fils de la tresse et le poids au mètre linéaire de la tresse.
- Procédé selon la revendication 6 ou 7, caractérisé en ce que la tresse présente un tressage d'occupation normale.
- Procédé selon l'une des revendications 6 à 8, caractérisé en ce que la tresse comporte 4, 8 ou 16 fils entrelacés.
- Procédé selon l'une des revendications 6 à 9, caractérisé en ce que la tresse présente un poids au mètre linéaire comprise entre 0,5 et 4,5 g/m.
- Procédé selon l'une des revendications 6 à 10, caractérisé en ce que la tresse est en polypropylène.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0212850A FR2845933B1 (fr) | 2002-10-16 | 2002-10-16 | Pipette de laboratoire comportant une tresse de fils de fibres synthetiques entrelaces d'une couleur correspondant a au moins une caracteristique de la pipette |
| FR0212850 | 2002-10-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP1410845A2 true EP1410845A2 (fr) | 2004-04-21 |
| EP1410845A3 EP1410845A3 (fr) | 2004-09-15 |
| EP1410845B1 EP1410845B1 (fr) | 2010-04-14 |
Family
ID=32039767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP03356150A Expired - Lifetime EP1410845B1 (fr) | 2002-10-16 | 2003-10-13 | Pipette de laboratoire comportant une tresse de fils de fibres synthétiques entrelacés d'une couleur correspondant à au moins une caractéristique de la pipette |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US7007562B2 (fr) |
| EP (1) | EP1410845B1 (fr) |
| CN (1) | CN1304116C (fr) |
| AT (1) | ATE464122T1 (fr) |
| DE (1) | DE60332078D1 (fr) |
| DK (1) | DK1410845T3 (fr) |
| ES (1) | ES2344635T3 (fr) |
| FR (1) | FR2845933B1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3344393A4 (fr) * | 2015-09-03 | 2019-04-03 | Vistalab Technologies, Inc. | Pipette sérologique à faible oscillation, à faible force d'insertion |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7794664B2 (en) | 2006-11-16 | 2010-09-14 | Idexx Laboratories, Inc. | Pipette tip |
| USD572976S1 (en) * | 2007-03-27 | 2008-07-15 | Mansfield Bryan D | Drinking vessel |
| US8517219B1 (en) * | 2009-07-23 | 2013-08-27 | Frenchette Chatman Prince | Measuring device and method to use it |
| CN102847570A (zh) * | 2012-08-29 | 2013-01-02 | 浙江硕华医用塑料有限公司 | 一次性吸量管 |
| CH718088A1 (de) * | 2020-11-24 | 2022-05-31 | Integra Biosciences Ag | Pipette und Pipettierhilfe mit 2-Zeichen-Codierung. |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4523366A (en) * | 1984-01-20 | 1985-06-18 | Meteor Manufacturing & Machinery Co. | Automated pipet plugging machine |
| FR2604013B1 (fr) * | 1986-09-12 | 1989-03-24 | Articles Laboratoire Precision | Procede de caracterisation d'un instrument de laboratoire et pipette ainsi caracterisee par coloration |
| CA2017111C (fr) * | 1989-06-01 | 1995-10-31 | Andreas Greter | Dispositif de pipettage |
| US5364595A (en) * | 1993-07-02 | 1994-11-15 | Porex Technologies Corp. | Pipette device constructed to prevent contamination by aerosols or overpipetting |
| DE4410633C1 (de) * | 1994-03-26 | 1995-07-20 | Biotest Ag | Filtersystem |
| GB9424703D0 (en) * | 1994-12-07 | 1995-02-01 | Fsm Technologies Ltd | Plug |
| US5563356A (en) * | 1995-06-16 | 1996-10-08 | Becton, Dickinson And Company | Pipet with indicia of scale graduation marking location |
| US5851491A (en) * | 1997-06-13 | 1998-12-22 | Labcon, North America | Pipette tip and filter for accurate sampling and prevention of contamination |
| US6045757A (en) * | 1997-06-30 | 2000-04-04 | Rainin Instrument Co., Inc. | Membrane filter pipette tip |
| US6200328B1 (en) * | 1998-05-01 | 2001-03-13 | Sub Q, Incorporated | Device and method for facilitating hemostasis of a biopsy tract |
-
2002
- 2002-10-16 FR FR0212850A patent/FR2845933B1/fr not_active Expired - Fee Related
-
2003
- 2003-10-13 ES ES03356150T patent/ES2344635T3/es not_active Expired - Lifetime
- 2003-10-13 AT AT03356150T patent/ATE464122T1/de not_active IP Right Cessation
- 2003-10-13 EP EP03356150A patent/EP1410845B1/fr not_active Expired - Lifetime
- 2003-10-13 DK DK03356150.7T patent/DK1410845T3/da active
- 2003-10-13 DE DE60332078T patent/DE60332078D1/de not_active Expired - Lifetime
- 2003-10-16 CN CNB2003101005606A patent/CN1304116C/zh not_active Expired - Fee Related
- 2003-10-16 US US10/685,439 patent/US7007562B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3344393A4 (fr) * | 2015-09-03 | 2019-04-03 | Vistalab Technologies, Inc. | Pipette sérologique à faible oscillation, à faible force d'insertion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1496759A (zh) | 2004-05-19 |
| ATE464122T1 (de) | 2010-04-15 |
| EP1410845A3 (fr) | 2004-09-15 |
| US20040123680A1 (en) | 2004-07-01 |
| CN1304116C (zh) | 2007-03-14 |
| FR2845933A1 (fr) | 2004-04-23 |
| EP1410845B1 (fr) | 2010-04-14 |
| FR2845933B1 (fr) | 2005-02-11 |
| ES2344635T3 (es) | 2010-09-02 |
| DK1410845T3 (da) | 2010-07-26 |
| DE60332078D1 (de) | 2010-05-27 |
| HK1063751A1 (en) | 2005-01-14 |
| US7007562B2 (en) | 2006-03-07 |
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