CH420506A - Verfahren und Einrichtung zum Biegen einer Glastafel - Google Patents
Verfahren und Einrichtung zum Biegen einer GlastafelInfo
- Publication number
- CH420506A CH420506A CH1120262A CH1120262A CH420506A CH 420506 A CH420506 A CH 420506A CH 1120262 A CH1120262 A CH 1120262A CH 1120262 A CH1120262 A CH 1120262A CH 420506 A CH420506 A CH 420506A
- Authority
- CH
- Switzerland
- Prior art keywords
- bending
- glass sheet
- glass
- sheet
- Prior art date
Links
- 238000005452 bending Methods 0.000 title 1
- 239000011521 glass Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/0404—Nozzles, blow heads, blowing units or their arrangements, specially adapted for flat or bent glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/008—Tempering or quenching glass products by using heat of sublimation of solid particles
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/0413—Stresses, e.g. patterns, values or formulae for flat or bent glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B27/00—Tempering or quenching glass products
- C03B27/04—Tempering or quenching glass products using gas
- C03B27/044—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position
- C03B27/048—Tempering or quenching glass products using gas for flat or bent glass sheets being in a horizontal position on a gas cushion
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
- C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
- C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
- C03B29/08—Glass sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
- C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
- C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
- C03B29/08—Glass sheets
- C03B29/12—Glass sheets being in a horizontal position on a fluid support, e.g. a gas or molten metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/16—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands by roller conveyors
- C03B35/18—Construction of the conveyor rollers ; Materials, coatings or coverings thereof
- C03B35/189—Disc rollers
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/22—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal
- C03B35/24—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal on a gas support bed
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
- C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
- C03B35/22—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal
- C03B35/24—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal on a gas support bed
- C03B35/243—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands on a fluid support bed, e.g. on molten metal on a gas support bed having a non-planar surface, e.g. curved, for bent sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B2225/00—Transporting hot glass sheets during their manufacture
- C03B2225/02—Means for positioning, aligning or orientating the sheets during their travel, e.g. stops
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mathematical Physics (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
- Tunnel Furnaces (AREA)
- Glass Compositions (AREA)
- Air Bags (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Surface Treatment Of Glass (AREA)
Applications Claiming Priority (13)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13990161A | 1961-09-22 | 1961-09-22 | |
| US17223562A | 1962-02-09 | 1962-02-09 | |
| US17593862A | 1962-02-27 | 1962-02-27 | |
| US176080A US3223498A (en) | 1962-02-27 | 1962-02-27 | Heat treatment of conveyed glass and apparatus therefor |
| US17899762A | 1962-03-12 | 1962-03-12 | |
| US18544862A | 1962-04-05 | 1962-04-05 | |
| US236-676A US3223501A (en) | 1962-05-18 | Method and apparatus for treating glass on a pressurized fluid bed | |
| US199901A US3223499A (en) | 1962-06-04 | 1962-06-04 | Method of treating and conveying glass sheets |
| US20945662A | 1962-07-12 | 1962-07-12 | |
| US23610362A | 1962-11-07 | 1962-11-07 | |
| US23667662A | 1962-11-09 | 1962-11-09 | |
| US502670A US3332761A (en) | 1961-09-22 | 1965-10-22 | Method of annealing sheets of glass on a decreasing temperature gas support |
| US513378A US3342573A (en) | 1961-09-22 | 1965-12-13 | Method of heat treating glass sheets on a gaseous support bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH420506A true CH420506A (de) | 1966-09-15 |
Family
ID=27584531
Family Applications (7)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1120262A CH420506A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Einrichtung zum Biegen einer Glastafel |
| CH1120862A CH438598A (de) | 1961-09-22 | 1962-09-22 | Verfahren zum Behandeln von Glastafeln einschliesslich der Übertragung von Wärme |
| CH1120362A CH432735A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Vorrichtung zum Erhitzen von Glastafeln |
| CH1120162A CH415979A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Einrichtung zum Tragen wenigstens einer Glastafel |
| CH1713165A CH430964A (de) | 1961-09-22 | 1962-09-22 | Verfahren zum Tempern einer Glastafel |
| CH1120762A CH429047A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Einrichtung zur Behandlung einer Glastafel |
| CH853063A CH421399A (de) | 1961-09-22 | 1963-07-09 | Durch Gas getemperte Glasplatte |
Family Applications After (6)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1120862A CH438598A (de) | 1961-09-22 | 1962-09-22 | Verfahren zum Behandeln von Glastafeln einschliesslich der Übertragung von Wärme |
| CH1120362A CH432735A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Vorrichtung zum Erhitzen von Glastafeln |
| CH1120162A CH415979A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Einrichtung zum Tragen wenigstens einer Glastafel |
| CH1713165A CH430964A (de) | 1961-09-22 | 1962-09-22 | Verfahren zum Tempern einer Glastafel |
| CH1120762A CH429047A (de) | 1961-09-22 | 1962-09-22 | Verfahren und Einrichtung zur Behandlung einer Glastafel |
| CH853063A CH421399A (de) | 1961-09-22 | 1963-07-09 | Durch Gas getemperte Glasplatte |
Country Status (9)
Families Citing this family (39)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3409422A (en) * | 1961-09-22 | 1968-11-05 | Ppg Industries Inc | Method and apparatus for forming a compound bend in a glass sheet on a gas support bed |
| US3531319A (en) * | 1963-09-16 | 1970-09-29 | Saint Gobain | Method and apparatus for the coating in vacuo of a moving ribbon |
| US3332760A (en) * | 1963-12-05 | 1967-07-25 | Permaglass | Apparatus providing a gaseous support bed and method for treating glass or the like thereon |
| US3291590A (en) * | 1964-09-11 | 1966-12-13 | Permaglass | Apparatus for bending glass sheets |
| US3332759A (en) * | 1963-11-29 | 1967-07-25 | Permaglass | Method of and apparatus for manufacturing glass sheets on a gas support bed |
| US3455671A (en) * | 1966-05-09 | 1969-07-15 | Permaglass | Gas support bed apparatus for treating glass |
| US3455669A (en) * | 1966-05-09 | 1969-07-15 | Permaglass | Apparatus for heat treating glass on a fluid support |
| US3455670A (en) * | 1966-05-09 | 1969-07-15 | Permaglass | Heat exchange apparatus for treating glass |
| US3712780A (en) * | 1969-09-25 | 1973-01-23 | Monsanto Co | Improved molding apparatus for simultaneously forming plural articles |
| US3885944A (en) * | 1970-03-24 | 1975-05-27 | Battelle Memorial Institute | Method of making sheet glass |
| GB1370945A (en) * | 1971-04-16 | 1974-10-16 | Triplex Safety Glass Co | Conveying apparatus |
| FR2397368A1 (fr) * | 1977-07-12 | 1979-02-09 | Ppg Industries Inc | Procede et dispositif pour le refroidissement de feuilles de verre au cours de leur trempe |
| US4139359A (en) * | 1977-11-02 | 1979-02-13 | Ppg Industries, Inc. | Method and apparatus for shaping glass sheets by roll forming |
| FR2474743B1 (fr) * | 1980-01-24 | 1986-10-31 | Jeumont Schneider | Dispositif electromagnetique du type vis-ecrou a securite |
| US4314836A (en) * | 1980-08-04 | 1982-02-09 | Ppg Industries, Inc. | Glass sheet tempering apparatus with nozzle arrangement providing fluid escape paths and method of tempering glass sheets |
| US4381933A (en) * | 1982-01-25 | 1983-05-03 | Ppg Industries, Inc. | Method and apparatus for shaping moving glass sheets by sagging followed by roll pressing |
| GB2118928A (en) * | 1982-04-21 | 1983-11-09 | Geoffrey Cooke | Enamelling process |
| IT1214033B (it) * | 1987-02-03 | 1990-01-05 | Carlomagno Giovanni Maria | Procedimento e dispositivo per esercitare forze su lastre di vetro, in particolare ad elevata temperatura |
| US5209767A (en) * | 1991-03-19 | 1993-05-11 | Glasstech, Inc. | Glass sheet annealing lehr having gas support conveyor |
| CN1183090A (zh) * | 1996-03-21 | 1998-05-27 | 彼得·利瑟 | 玻璃钢化方法及系统 |
| US6079227A (en) * | 1997-06-05 | 2000-06-27 | Nippon Sheet Glass Co., Ltd. | Method for manufacturing bent and tempered glass sheet and apparatus for manufacturing the same |
| JPH10338532A (ja) * | 1997-06-05 | 1998-12-22 | Nippon Sheet Glass Co Ltd | 強化ガラス板の製造方法および製造装置 |
| AT411360B (de) * | 2002-07-25 | 2003-12-29 | Doeller Bettina | Verfahren zur herstellung von fliesen aus glas |
| US20060042314A1 (en) * | 2004-08-27 | 2006-03-02 | Abbott John S Iii | Noncontact glass sheet stabilization device used in fusion forming of a glass sheet |
| US7260959B2 (en) * | 2004-08-27 | 2007-08-28 | Corning Incorporated | Glass handling system and method for using same |
| DE102006049488A1 (de) * | 2006-10-17 | 2008-04-30 | Höllmüller Maschinenbau GmbH | Vorrichtung zum Behandeln von flachen, zerbrechlichen Substraten |
| DE202008017643U1 (de) | 2008-10-17 | 2010-04-22 | Saint-Gobain Sekurit Deutschland Gmbh & Co. Kg | Vorrichtung zum Biegen von Glasscheiben |
| BE1024010B1 (fr) * | 2012-09-21 | 2017-10-27 | Agc Glass Europe | Bombage de vitrages |
| JP6510911B2 (ja) * | 2015-06-26 | 2019-05-08 | グラストン フィンランド オイＧｌａｓｔｏｎ Ｆｉｎｌａｎｄ Ｏｙ | ガラス板を強化するための加熱方法 |
| EP3109207B1 (en) * | 2015-06-26 | 2018-10-31 | Glaston Finland Oy | Method of heating a glass sheet for tempering |
| US9617181B2 (en) | 2015-07-27 | 2017-04-11 | Glaston Finland Oy | Method of heating a glass sheet for tempering |
| EP3328807A1 (en) * | 2015-07-30 | 2018-06-06 | Corning Incorporated | Thermally strengthened architectural glass and related systems and methods |
| WO2018052833A1 (en) * | 2016-09-13 | 2018-03-22 | Corning Incorporated | Apparatus and method for processing a glass substrate |
| CN110730764B (zh) * | 2017-06-27 | 2022-04-19 | 格拉司通芬兰公司 | 用于回火玻璃板的方法 |
| MA53585A (fr) * | 2018-09-14 | 2021-12-22 | Saint Gobain | Dispositif et procédé de trempe thermique de vitres à l'aide d'un échangeur de chaleur |
| US11128241B2 (en) | 2019-04-04 | 2021-09-21 | Mando Corporation | Motor control system and method for selectively shorting motor windings |
| HUE062827T2 (hu) * | 2019-04-11 | 2023-12-28 | Saint Gobain | Eljárás az üvegtábla edzési nyomok kialakulására való érzékenységének értékelésére |
| FR3102983B1 (fr) * | 2019-11-08 | 2021-11-26 | Saint Gobain | Procédé et dispositif de bombage d’une feuille de verre |
| WO2023112568A1 (ja) * | 2021-12-17 | 2023-06-22 | 日本電気硝子株式会社 | ガラス物品及びその製造方法 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US820205A (en) * | 1905-12-07 | 1906-05-08 | William B Keighley | Apparatus for the manufacture of sheet-glass. |
| US3223501A (en) * | 1962-05-18 | 1965-12-14 | Pittsburgh Plate Glass Co | Method and apparatus for treating glass on a pressurized fluid bed |
| NL295341A (US07582779-20090901-C00044.png) * | 1962-07-26 |
-
0
- BE BE622748D patent/BE622748A/xx unknown
- NL NL283300D patent/NL283300A/xx unknown
- BE BE622743D patent/BE622743A/xx unknown
- NL NL283299D patent/NL283299A/xx unknown
- NL NL295243D patent/NL295243A/xx unknown
- BE BE622746D patent/BE622746A/xx unknown
- NL NL283302D patent/NL283302A/xx unknown
- BE BE622751D patent/BE622751A/xx unknown
- NL NL283297D patent/NL283297A/xx unknown
- BE BE622744D patent/BE622744A/xx unknown
- BE BE622749D patent/BE622749A/xx unknown
- NL NL283298D patent/NL283298A/xx unknown
- NL NL283304D patent/NL283304A/xx unknown
- NL NL131325D patent/NL131325C/xx active
- BE BE622747D patent/BE622747A/xx unknown
- NL NL283301D patent/NL283301A/xx unknown
- NL NL283296D patent/NL283296A/xx unknown
- BE BE634891D patent/BE634891A/xx unknown
- BE BE622745D patent/BE622745A/xx unknown
-
1962
- 1962-09-17 NL NL62283296A patent/NL139059B/xx not_active IP Right Cessation
- 1962-09-17 NL NL62283297A patent/NL138823B/xx unknown
- 1962-09-19 GB GB35637/62A patent/GB1021848A/en not_active Expired
- 1962-09-19 GB GB37241/65A patent/GB1021853A/en not_active Expired
- 1962-09-19 GB GB35635/62A patent/GB1021846A/en not_active Expired
- 1962-09-19 GB GB35633/62A patent/GB1021844A/en not_active Expired
- 1962-09-19 GB GB35629/62A patent/GB1021841A/en not_active Expired
- 1962-09-19 GB GB35636/62A patent/GB1021847A/en not_active Expired
- 1962-09-19 GB GB35631/62A patent/GB1021842A/en not_active Expired
- 1962-09-19 GB GB35634/62A patent/GB1021845A/en not_active Expired
- 1962-09-19 GB GB35632/62A patent/GB1021843A/en not_active Expired
- 1962-09-20 NO NO160829A patent/NO116134B/no unknown
- 1962-09-21 SE SE10155/62A patent/SE300873B/xx unknown
- 1962-09-22 CH CH1120262A patent/CH420506A/de unknown
- 1962-09-22 DE DE1962P0030219 patent/DE1421783B2/de not_active Withdrawn
- 1962-09-22 CH CH1120862A patent/CH438598A/de unknown
- 1962-09-22 JP JP37040947A patent/JPS4826365B1/ja active Pending
- 1962-09-22 DE DE1962P0030218 patent/DE1421782B2/de active Granted
- 1962-09-22 CH CH1120362A patent/CH432735A/de unknown
- 1962-09-22 CH CH1120162A patent/CH415979A/de unknown
- 1962-09-22 DE DE1962P0030223 patent/DE1421787B2/de active Pending
- 1962-09-22 DE DE19621421781 patent/DE1421781A1/de active Pending
- 1962-09-22 DE DE1962P0030222 patent/DE1421786B2/de active Pending
- 1962-09-22 DE DE19621421785 patent/DE1421785B2/de active Pending
- 1962-09-22 CH CH1713165A patent/CH430964A/de unknown
- 1962-09-22 DE DE1962P0030224 patent/DE1421788A1/de active Pending
- 1962-09-22 DE DE1962P0030220 patent/DE1421784A1/de active Pending
- 1962-09-22 CH CH1120762A patent/CH429047A/de unknown
-
1963
- 1963-07-09 DE DE19631471941 patent/DE1471941A1/de active Pending
- 1963-07-09 CH CH853063A patent/CH421399A/de unknown
- 1963-07-10 GB GB27290/63A patent/GB1021849A/en not_active Expired
-
1965
- 1965-10-22 US US502670A patent/US3332761A/en not_active Expired - Lifetime
- 1965-12-13 US US513378A patent/US3342573A/en not_active Expired - Lifetime
-
1966
- 1966-11-02 JP JP41072021A patent/JPS5120532B1/ja active Pending
- 1966-11-04 SE SE1512366A patent/SE301696B/xx unknown
-
1972
- 1972-06-01 NL NL7207436A patent/NL7207436A/xx unknown
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