US3627432A - Reaction vessel for use in photometric measurements - Google Patents

Reaction vessel for use in photometric measurements Download PDF

Info

Publication number
US3627432A
US3627432A US820231A US3627432DA US3627432A US 3627432 A US3627432 A US 3627432A US 820231 A US820231 A US 820231A US 3627432D A US3627432D A US 3627432DA US 3627432 A US3627432 A US 3627432A
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US
United States
Prior art keywords
reaction vessel
vessel
vessel according
ribs
parallel planar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US820231A
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English (en)
Inventor
Wilhelm Bergmann
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.)
Eppendorf SE
Original Assignee
Eppendorf Geraetebau Netheler and Hinz GmbH
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 DE19681773333 external-priority patent/DE1773333C3/de
Application filed by Eppendorf Geraetebau Netheler and Hinz GmbH filed Critical Eppendorf Geraetebau Netheler and Hinz GmbH
Application granted granted Critical
Publication of US3627432A publication Critical patent/US3627432A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B01L3/508—Rigid containers without fluid transport within
    • B01L3/5082—Test tubes per se
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions

Definitions

  • reaction vessels having a height of approximately 30 mm. and a diameter of approximately mm.
  • Such vessels are generally of cylindrical form and have an upper flange rim providing a shoulder which facilitates handling.
  • Such vessels are of particular usefulness in connection with automatic processing systems wherein the transfer of the vessel and the agitation and treatment of the contents are simplified by the cylindrical form.
  • These vessels are frequently made of plastic and are dispensable so that they need be used only once. In general the vessels have heretofore been used for mechanical treatment of the contents only.
  • special measuring cuvettes must be employed. The contents of the original vessel are transferred into these measuring cuvettes in order to assure that the optical properties of the vessel exhibit desired characteristics.
  • the present invention provides a reaction vessel which is not only particularly well suited for the mechanical treatment of the contents thereof, but at the same time may be employed as a cuvette suitable for making photometric measurements.
  • the vessel of the present invention exhibits in cross section a pair of parallel planar walls on opposing sides. These walls are disposed along chords of the circle defined by the upper cylindrical portion of the vessel. Outwardly directed ribs are arranged on the planar surfaces with a space therebetween. These ribs project no further than the periphery of said cylindrical portions.
  • the vessels of the present invention are suitable for handling in automatic systems in the same manner as existing vessels.
  • these vessels permit measurements to be made photometrically.
  • An object of the present invention is to provide an improved reaction vessel for both mechanical preparation of the contents and photometric measurement thereof.
  • Another object of the invention is to provide an improved reaction vessel having parallel planar walls.
  • Another object of the invention is to provide an improved reaction vessel having parallel planar walls and yet retaining a basically cylindrical configuration relative to the longitudinal axis thereof.
  • Another object of the invention is to provide an improved reaction vessel having thin parallel planar walls and reinforcing ribs.
  • Another object of the present invention is to provide an improved reaction vessel particularly adapted for insertion into openings or holes without damaging the planar surfaces.
  • the wall sections between the previously mentioned planar surfaces be also drawn in and arranged as parallel planar surfaces that are orthogonally disposed relative to the first mentioned planar surfaces and which also lie along chords of the circle defined by the cylindrical portion of the vessel.
  • the same vessel provides two different optical measurement paths.
  • the invention provide an inner core section of the vessel which is rectangular at least in the region of the aforementioned planar surfaces. This rectangular section and the plane surface section being advantageously adjacent to an upper cylindrical wall section which is directly under a rim flange.
  • a nose, or bottom portion, of substantially rectangular section is provided at the bottom of the vessel.
  • Another object of the invention is to provide an improved reaction vessel having two photometric measuring paths.
  • Another object of the present invention is to provide an improved reaction vessel having an at least partially rectangular interior portion in order to provide better mixing in the event of agitation.
  • Still another object of the present invention is to provide an improved reaction vessel having good form stability and heat transfer characteristics.
  • Yet another object of the present invention is to provide an improved reaction vessel including means for facilitating alignment of the vessel.
  • the ribs protect the planar surfaces against mechanical contact, scratching, and the like, and thereby provide an important function considering the fact that the vessel may be used for photometric measurements. These ribs may also be utilized in order to align the vessel for measurement.
  • a rectangular nose portion, or base portion at the bottom of the vessel.
  • stepped surfaces extend at right angles to the longitudinal axis of the vessel and are arranged on at least two sides of the rectangular base. These surfaces make it possible to hold the vessel by the base and support it upon the stepped surfaces so that it is not inserted too deeply into any openings.
  • the vessel tapers at the bottom, the taper being produced essentially by chamfering of the ribs, while the interior of the vessel has a constant rectangular cross section extending through to the bottom.
  • This tapering facilitates the easy introduction of the vessel into openings. It is to be noted however that the planar surfaces do not participate in this tapering eflect and that they are always parallel with one another.
  • FIG. 1 is a side elevation of a vessel embodying the present invention, half of this elevation being in section along the line I-I shown in FIG. 2;
  • FIG. 2 is a top view of a vessel embodying the present invention
  • FIG. 3 is a side elevation of the vessel shown in FIG. 1, rotated through and having a portion in cross section taken along the line III-III shown in FIG. 4;
  • FIG. 4 is a bottom view of the vessel embodying the invention, half of said view being in section taken along the line IV-IV in FIG. 3.
  • the figures disclose a vessel which is open at the top and which may be provided with a variety of closure means.
  • the vessel may have a height of approximately 30 mm. and the outside diameter of the upper flange rim may be approximately 18 mm.
  • the upper portion of the vessel includes an outwardly extending flange 1 below and adjacent to which is a recessed cylindrical wall section 2. Below the cylindrical wall section 2, the vessel walls are disposed inwardly and establish parallel planar surfaces. Two opposing surfaces 3 and 4 are created having somewhat greater width than the lateral interconnecting surfaces 5 and 6 which extend therebetween at right angles.
  • the plane surfaces 3 and 4 have disposed thereon pairs of perpendicularly extending ribs 7, 8 and 9, 10, which are spaced from the center of the surfaces and extend orthogonally therefrom to terminate in the outer contour defined by the upper cylindrical portion 2 of the vessel. These ribs may also form a smooth transition into the cylindrical section 2. The outer edges of the ribs are accordingly designed obliquely to their major axes.
  • the surfaces 5 and 6 are also flanked by pairs of ribs 11, 12 and 13, 14.
  • the ribs 11-14 lie in prolongation of the wall portions forming the plane surfaces 3 and 4.
  • the inner cross section of the vessel at the level of the plane surfaces 3 and 4 is rectangular as illustrated at 15 in FIG. 2.
  • the transitions 16 and 17 from the cylindrical vessel wall section 2 to the section with the inner cross section are formed by oblique transition surfaces; the inclination of the surfaces 16, 17 being different due to the different retraction of the plane surfaces 3 and 4 on the one hand and of the lateral surfaces 5 and 6 on the other.
  • the ribs 11-14 are somewhat flatter than the ribs 7-10.
  • FIG. 4 illustrates that the lower limiting edges 19 and 20 under the lateral surfaces 5 and 6 may be slightly rounded. This results from the amount of taper of the vessel downwardly.
  • the longer edge 21 shown in FIG. 4, and the corresponding edge on the opposite side (not shown), under the plane surfaces 3 and 4 are straight and parallel to the plane surfaces so that they may be used for alignment of the vessel.
  • FIGS. 1 and 3 also illustrate that the nose 18 tapers downwardly so that its introduction into a correspondingly profiled opening may be facilitated.
  • stepped surfaces 22 and 23 are provided parallel to the longitudinal edges of the nose 18. These surfaces provide for aligned vertical placement and make it possible to place a vessel with the nose 18 only in a prepared opening. These stepped surfaces may continue into the lower region of the ribs 710 so that a relatively large support surface is provided.
  • the taper of the lower vessel edge is produced in particular at the circumferential sections at which the plane surfaces 3 and 4 are located, by chamfers 24 and 25 of the ribs.
  • the vessel body may also be bevelled, as for example at 26 in FIG. 3, this chamfer will lie below the bottom surface 27 of the vessel.
  • reaction vessel according to claim 1 wherein the center of said circle lies on said longitudinal axis.
  • a reaction vessel according to claim 1, wherein said circle has the same radius as said upper cylindrical portion.
  • each of said opposed parallel planar walls comprise planar portions that define chords on a circle disposed within a transverse plane through said vessel and orthogonal to said axis.
  • reaction vessel according to claim 1, wherein the wall sections of said vessel between said parallel planar walls are opposed parallel planar lateral surfaces.
  • reaction vessel wherein end ribs project from said lateral surfaces as prolongations of said first mentioned parallel planar walls.
  • reaction vessel wherein said vessel tapers at the bottom, said taper being affected essentially by a chamfer of said projecting ribs, and wherein the interior of said vessel has a constant rectangular cross section extending to the bottom thereof.
  • a reaction vessel according to claim I having substantially equal wall thickness throughout.
  • reaction vessel according to claim 1, wherein the inner cross section of the vessel is rectangular at least in the region of said planar walls.
  • a reaction vessel according to claim 9 wherein a projecting portion extends from the bottom of the vessel and exhibits a substantially rectangular transverse cross section.
  • reaction vessel according to claim 10 wherein the longer axis of said rectangular cross section extends parallel to said first mentioned parallel planar walls and at least the edges of said projection are straight in this direction.
  • a reaction vessel according to claim 1 wherein at least on two sides of said projecting portion, stepped surfaces extend at right angles to said longitudinal axis.

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Hematology (AREA)
  • Biochemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Optical Measuring Cells (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
US820231A 1968-05-02 1969-04-29 Reaction vessel for use in photometric measurements Expired - Lifetime US3627432A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681773333 DE1773333C3 (de) 1968-05-02 Gefäß zur optischen Untersuchung kleiner Flüssigkeitsmengen

Publications (1)

Publication Number Publication Date
US3627432A true US3627432A (en) 1971-12-14

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ID=5701646

Family Applications (1)

Application Number Title Priority Date Filing Date
US820231A Expired - Lifetime US3627432A (en) 1968-05-02 1969-04-29 Reaction vessel for use in photometric measurements

Country Status (3)

Country Link
US (1) US3627432A (fr)
CH (1) CH493834A (fr)
FR (1) FR2007708A1 (fr)

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994171A (en) * 1973-01-02 1976-11-30 Schwartz Henry D Clinical testing apparatus
US4021124A (en) * 1975-02-27 1977-05-03 Kunststoff-Spritzgusswerk Vessels for the optical observation of liquids
US4140489A (en) * 1977-02-07 1979-02-20 Lee Sun Y Test tube for easy enumeration and cultivation of anaerobic and facultatively anaerobic microorganisms
US4229104A (en) * 1977-03-12 1980-10-21 Eppendorf Geratebau Netheler & Hinz Gmbh Mixing cuvette
US4240751A (en) * 1978-11-09 1980-12-23 Akzona Incorporated Method and apparatus for specific binding substances
US4254223A (en) * 1978-04-18 1981-03-03 Akzona Incorporated Apparatus for colorimetric determination
USD283728S (en) 1982-09-06 1986-05-06 Olympus Optical Co. Ltd. Container for a sample of liquid serum or the like
US4648713A (en) * 1982-12-29 1987-03-10 Hoffmann-La Roche Inc. Method and cuvette for photometric analysis
US4968486A (en) * 1989-07-14 1990-11-06 Eastman Kodak Company Device for absorbing shock to a container
USD337388S (en) 1990-09-14 1993-07-13 Hemocue Ab Cuvette for an optical analysis of liquids
USD342793S (en) 1991-05-07 1993-12-28 Hoffmann-La Roche Inc. Cuvette
USD343905S (en) 1990-08-23 1994-02-01 Olympus Optical Co., Ltd. Cuvette for use in chemical analysis
USD344138S (en) 1992-06-10 1994-02-08 Olympus Optical Co., Ltd. Reaction container for a chemical analyzer
USD353676S (en) 1992-07-16 1994-12-20 Spectrum Systems, Inc. Cuvette for a chemical analyzer
US5437841A (en) * 1991-05-07 1995-08-01 Hoffmann-La Roche Inc. Cuvette
US5452881A (en) * 1992-11-07 1995-09-26 Horiba Ltd. Crucible for an analyzer
US5571479A (en) * 1994-02-18 1996-11-05 Hoffmann-La Roche Inc. Cuvette
US5658532A (en) * 1994-09-30 1997-08-19 Toa Medical Electronics Co., Ltd. Cuvette and cuvette-transporting apparatus
US6190615B1 (en) * 1996-05-16 2001-02-20 Diesse Diagnostica Senese S.R.L. Test tube for biological analyses of organic liquids using electro-optical equipment
US6603544B1 (en) 2002-02-06 2003-08-05 Tech Ref, Inc. Sample cell
US20050013746A1 (en) * 2003-07-18 2005-01-20 Ching-Cherng Lee Reaction cuvette having anti-wicking features for use in an automatic clinical analyzer
USD642282S1 (en) * 2009-07-03 2011-07-26 The Automation Partnership (Cambridge) Bioreactor vessel
US8211386B2 (en) * 2004-06-08 2012-07-03 Biokit, S.A. Tapered cuvette and method of collecting magnetic particles
EP2698624A1 (fr) * 2012-08-16 2014-02-19 Siemens Healthcare Diagnostics Products GmbH Récipient réactionnel
EP1909094A4 (fr) * 2005-07-27 2014-12-17 Sysmex Corp Cuvette
USD743045S1 (en) * 2013-06-21 2015-11-10 Stratec Biomedical Ag Cuvette
USD808036S1 (en) * 2015-09-29 2018-01-16 Bd Kiestra B.V. Cuvette
USD810959S1 (en) 2015-09-29 2018-02-20 Bd Kiestra B.V. Cuvette tray
US10359573B2 (en) 1999-11-05 2019-07-23 Board Of Regents, The University Of Texas System Resonant waveguide-granting devices and methods for using same
US11155402B2 (en) * 2019-01-22 2021-10-26 Lerman Container Corporation Cartridge tube
US20220219163A1 (en) * 2013-03-14 2022-07-14 Gen-Probe Incorporated Cap having a ribbed inner surface
US11965820B2 (en) 2018-09-27 2024-04-23 Hitachi High-Tech Corporation Reaction vessel for automatic analyzer

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2922697A1 (de) * 1979-06-02 1980-12-11 Hoechst Ag Kuevette fuer optische untersuchungen von fluessigkeiten
IT1246993B (it) * 1991-01-10 1994-12-12 Diesse Diagnostica Provetta per analisi biologiche munita di dispositivo di controllo, di efficienza e di posizione, per letture fotometriche.
JPH0743523U (ja) * 1993-12-28 1995-08-22 東亜医用電子株式会社 キュベット

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE578807C (de) * 1931-03-11 1933-06-17 Arnold Renshaw Reagenzglas
US2394023A (en) * 1944-01-05 1946-02-05 Chemical Developments Corp Packed tower
US2397846A (en) * 1943-10-04 1946-04-02 Harry W Dietert Apparatus for analysis of gas
US3246559A (en) * 1961-12-26 1966-04-19 Beckman Instruments Inc Force feed cuvette
US3263554A (en) * 1961-12-26 1966-08-02 Beckman Instruments Inc Cuvette with means for controlled volumetric displacement
US3286583A (en) * 1962-06-22 1966-11-22 Technicon Instr Colorimeter flow cell and holder
US3363503A (en) * 1963-10-07 1968-01-16 Beckman Instruments Inc Micro-volume sample cells

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE578807C (de) * 1931-03-11 1933-06-17 Arnold Renshaw Reagenzglas
US2397846A (en) * 1943-10-04 1946-04-02 Harry W Dietert Apparatus for analysis of gas
US2394023A (en) * 1944-01-05 1946-02-05 Chemical Developments Corp Packed tower
US3246559A (en) * 1961-12-26 1966-04-19 Beckman Instruments Inc Force feed cuvette
US3263554A (en) * 1961-12-26 1966-08-02 Beckman Instruments Inc Cuvette with means for controlled volumetric displacement
US3286583A (en) * 1962-06-22 1966-11-22 Technicon Instr Colorimeter flow cell and holder
US3363503A (en) * 1963-10-07 1968-01-16 Beckman Instruments Inc Micro-volume sample cells

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Henderson et al., Analyt. Chem., Vol. 31, No. 12, Dec., 1959, pg. 2113 *

Cited By (44)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3994171A (en) * 1973-01-02 1976-11-30 Schwartz Henry D Clinical testing apparatus
US4021124A (en) * 1975-02-27 1977-05-03 Kunststoff-Spritzgusswerk Vessels for the optical observation of liquids
US4140489A (en) * 1977-02-07 1979-02-20 Lee Sun Y Test tube for easy enumeration and cultivation of anaerobic and facultatively anaerobic microorganisms
US4229104A (en) * 1977-03-12 1980-10-21 Eppendorf Geratebau Netheler & Hinz Gmbh Mixing cuvette
US4254223A (en) * 1978-04-18 1981-03-03 Akzona Incorporated Apparatus for colorimetric determination
US4240751A (en) * 1978-11-09 1980-12-23 Akzona Incorporated Method and apparatus for specific binding substances
USD283728S (en) 1982-09-06 1986-05-06 Olympus Optical Co. Ltd. Container for a sample of liquid serum or the like
US4648713A (en) * 1982-12-29 1987-03-10 Hoffmann-La Roche Inc. Method and cuvette for photometric analysis
US4968486A (en) * 1989-07-14 1990-11-06 Eastman Kodak Company Device for absorbing shock to a container
USD343905S (en) 1990-08-23 1994-02-01 Olympus Optical Co., Ltd. Cuvette for use in chemical analysis
USD337388S (en) 1990-09-14 1993-07-13 Hemocue Ab Cuvette for an optical analysis of liquids
USD342793S (en) 1991-05-07 1993-12-28 Hoffmann-La Roche Inc. Cuvette
US5437841A (en) * 1991-05-07 1995-08-01 Hoffmann-La Roche Inc. Cuvette
USD344138S (en) 1992-06-10 1994-02-08 Olympus Optical Co., Ltd. Reaction container for a chemical analyzer
USD353676S (en) 1992-07-16 1994-12-20 Spectrum Systems, Inc. Cuvette for a chemical analyzer
US5452881A (en) * 1992-11-07 1995-09-26 Horiba Ltd. Crucible for an analyzer
US5571479A (en) * 1994-02-18 1996-11-05 Hoffmann-La Roche Inc. Cuvette
EP0668496A3 (fr) * 1994-02-18 1997-02-26 Hoffmann La Roche Cuvette pour mesurage optique.
US5658532A (en) * 1994-09-30 1997-08-19 Toa Medical Electronics Co., Ltd. Cuvette and cuvette-transporting apparatus
US6190615B1 (en) * 1996-05-16 2001-02-20 Diesse Diagnostica Senese S.R.L. Test tube for biological analyses of organic liquids using electro-optical equipment
US6773675B2 (en) * 1996-05-16 2004-08-10 Diesse Diagnostica Senese S.R.L. Test tube for biological analyses of organic liquids using electro-optical equipment
US10359573B2 (en) 1999-11-05 2019-07-23 Board Of Regents, The University Of Texas System Resonant waveguide-granting devices and methods for using same
US6603544B1 (en) 2002-02-06 2003-08-05 Tech Ref, Inc. Sample cell
US20050013746A1 (en) * 2003-07-18 2005-01-20 Ching-Cherng Lee Reaction cuvette having anti-wicking features for use in an automatic clinical analyzer
US7138091B2 (en) * 2003-07-18 2006-11-21 Dade Behring Inc. Reaction cuvette having anti-wicking features for use in an automatic clinical analyzer
US8211386B2 (en) * 2004-06-08 2012-07-03 Biokit, S.A. Tapered cuvette and method of collecting magnetic particles
US8476080B2 (en) 2004-06-08 2013-07-02 Biokit, S.A. Tapered cuvette and method of collecting magnetic particles
EP3206011A1 (fr) * 2005-07-27 2017-08-16 Sysmex Corporation Cuvette
EP3421969A1 (fr) * 2005-07-27 2019-01-02 Sysmex Corporation Cuvette
EP1909094A4 (fr) * 2005-07-27 2014-12-17 Sysmex Corp Cuvette
USD642282S1 (en) * 2009-07-03 2011-07-26 The Automation Partnership (Cambridge) Bioreactor vessel
EP2698624A1 (fr) * 2012-08-16 2014-02-19 Siemens Healthcare Diagnostics Products GmbH Récipient réactionnel
EP2698626A3 (fr) * 2012-08-16 2014-04-23 Siemens Healthcare Diagnostics Products GmbH Récipient réactionnel
US20140050619A1 (en) * 2012-08-16 2014-02-20 Siemens Healthcare Diagnostics Products Gmbh Reaction Vessel
US12551896B2 (en) * 2013-03-14 2026-02-17 Gen-Probe Incorporated Cap having a ribbed inner surface
US20220219163A1 (en) * 2013-03-14 2022-07-14 Gen-Probe Incorporated Cap having a ribbed inner surface
USD743045S1 (en) * 2013-06-21 2015-11-10 Stratec Biomedical Ag Cuvette
USD810959S1 (en) 2015-09-29 2018-02-20 Bd Kiestra B.V. Cuvette tray
USD839448S1 (en) 2015-09-29 2019-01-29 Bd Kiestra B.V. Cuvette
USD939727S1 (en) 2015-09-29 2021-12-28 Bd Kiestra B.V. Cuvette tray
USD831844S1 (en) 2015-09-29 2018-10-23 Bd Kiestra B.V. Cuvette tray
USD808036S1 (en) * 2015-09-29 2018-01-16 Bd Kiestra B.V. Cuvette
US11965820B2 (en) 2018-09-27 2024-04-23 Hitachi High-Tech Corporation Reaction vessel for automatic analyzer
US11155402B2 (en) * 2019-01-22 2021-10-26 Lerman Container Corporation Cartridge tube

Also Published As

Publication number Publication date
CH493834A (de) 1970-07-15
DE1773333B2 (de) 1976-05-06
FR2007708A1 (fr) 1970-01-09
DE1773333A1 (de) 1971-07-22

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