GB989449A - Apparatus for removing volatile constituents contained in liquid synthetic plastic melts - Google Patents

Apparatus for removing volatile constituents contained in liquid synthetic plastic melts

Info

Publication number
GB989449A
GB989449A GB47568/62A GB4756862A GB989449A GB 989449 A GB989449 A GB 989449A GB 47568/62 A GB47568/62 A GB 47568/62A GB 4756862 A GB4756862 A GB 4756862A GB 989449 A GB989449 A GB 989449A
Authority
GB
United Kingdom
Prior art keywords
chamber
worm
plastic melt
slot
volatile constituents
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
Application number
GB47568/62A
Other languages
English (en)
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.)
Bayer AG
Original Assignee
Bayer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bayer AG filed Critical Bayer AG
Publication of GB989449A publication Critical patent/GB989449A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/84—Venting or degassing ; Removing liquids, e.g. by evaporating components
    • B29B7/845—Venting, degassing or removing evaporated components in devices with rotary stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/80—Component parts, details or accessories; Auxiliary operations
    • B29B7/86—Component parts, details or accessories; Auxiliary operations for working at sub- or superatmospheric pressure
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/285—Feeding the extrusion material to the extruder
    • B29C48/29—Feeding the extrusion material to the extruder in liquid form
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
    • B29C48/37—Gear pumps
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/375—Plasticisers, homogenisers or feeders comprising two or more stages
    • B29C48/387—Plasticisers, homogenisers or feeders comprising two or more stages using a screw extruder and a gear pump
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/763—Vent constructions, e.g. venting means avoiding melt escape
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/76—Venting, drying means; Degassing means
    • B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
    • B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/46—Post-polymerisation treatment
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92019—Pressure
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92466—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92866—Inlet shaft or slot, e.g. passive hopper; Injector, e.g. injector nozzle on barrel
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92961—Auxiliary unit, e.g. for external melt filtering, re-combining or transfer between units
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
GB47568/62A 1961-12-22 1962-12-17 Apparatus for removing volatile constituents contained in liquid synthetic plastic melts Expired GB989449A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF35631A DE1168076B (de) 1961-12-22 1961-12-22 Vorrichtung zum Entgasen von zum Schaeumen neigenden Kunststoffschmelzen

Publications (1)

Publication Number Publication Date
GB989449A true GB989449A (en) 1965-04-22

Family

ID=7096080

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47568/62A Expired GB989449A (en) 1961-12-22 1962-12-17 Apparatus for removing volatile constituents contained in liquid synthetic plastic melts

Country Status (6)

Country Link
US (1) US3217783A (enExample)
BE (1) BE626177A (enExample)
CH (1) CH424260A (enExample)
DE (1) DE1168076B (enExample)
GB (1) GB989449A (enExample)
NL (1) NL287054A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112304056A (zh) * 2020-10-16 2021-02-02 阜阳市鑫悦塑业科技有限公司 一种用于环保塑料制品加工的烘干装置

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Publication number Priority date Publication date Assignee Title
DE1494918A1 (de) * 1964-06-02 1969-06-04 Adox Du Pont Fotowerke Verfahren und Vorrichtung zum Konzentrieren von viskosen Loesungen hochpolymerer Substanzen
US3280886A (en) * 1965-08-24 1966-10-25 Union Carbide Corp Apparatus for the devolatilization of foamable viscous solutions
US3554263A (en) * 1968-04-09 1971-01-12 Chemetron Corp Discharge apparatus
US3554264A (en) * 1968-06-14 1971-01-12 Artisan Ind Thin-film evaporator having improved apparatus for removing viscous material
US3595296A (en) * 1969-05-12 1971-07-27 Union Carbide Corp Apparatus for flash evaporating, filming and extruding viscoelastic material
US3847022A (en) * 1973-05-29 1974-11-12 Seismograph Service Corp Slurry sampler for polymer separation
US4032391A (en) * 1975-09-03 1977-06-28 Union Carbide Corporation Low energy recovery compounding and fabricating systems for plastic materials
US4137023A (en) * 1975-09-03 1979-01-30 Union Carbide Corporation Low energy recovery compounding and fabricating apparatus for plastic materials
SE403309B (sv) * 1976-09-07 1979-01-29 Reinhall P G Skruvpress, sasom skruvmatare for lignocellulosahaltigt fibermaterial eller annat kompressibelt material i styckeform
DE3738976A1 (de) * 1987-11-17 1989-05-24 Belland Ag Verfahren und vorrichtung zur herstellung von thermoplastischen kunststoffen
DE59704349D1 (de) * 1996-05-10 2001-09-27 Barmag Barmer Maschf Extruder für Kunststoffgranulat
US9108354B2 (en) * 2010-12-01 2015-08-18 The Bonnot Company Process for de-airing material in an extruder that includes a vent block
US9630353B2 (en) 2012-05-31 2017-04-25 Mohawk Industries, Inc. Method of manufacturing bulked continuous filament
US9636860B2 (en) 2012-05-31 2017-05-02 Mohawk Industries, Inc. Method of manufacturing bulked continuous filament
US8597553B1 (en) 2012-05-31 2013-12-03 Mohawk Industries, Inc. Systems and methods for manufacturing bulked continuous filament
US10695953B2 (en) 2012-05-31 2020-06-30 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous carpet filament
US10532495B2 (en) 2012-05-31 2020-01-14 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous filament from recycled PET
US11045979B2 (en) 2012-05-31 2021-06-29 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous filament from recycled PET
US10487422B2 (en) 2012-05-31 2019-11-26 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous filament from colored recycled pet
US10538016B2 (en) * 2012-05-31 2020-01-21 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous carpet filament
DE202016101935U1 (de) * 2016-04-13 2016-04-27 Gneuss Gmbh Extrusionsanlage zur Herstellung von Formstücken aus Kunststoffen
US10751915B2 (en) 2016-11-10 2020-08-25 Aladdin Manufacturing Corporation Polyethylene terephthalate coloring systems and methods
US11351747B2 (en) 2017-01-30 2022-06-07 Aladdin Manufacturing Corporation Systems and methods for manufacturing bulked continuous filament from colored recycled PET
AU2018227587A1 (en) 2017-03-03 2019-08-22 Aladdin Manufacturing Corporation Method of manufacturing bulked continuous carpet filament
WO2019055762A1 (en) 2017-09-15 2019-03-21 Mohawk Industries, Inc. METHOD AND SYSTEM FOR COLORING POLYETHYLENE TEREPHTHALATE FOR MANUFACTURING CONTINUOUS CONTINUOUS MATERIAL FILAMENT
US11242622B2 (en) 2018-07-20 2022-02-08 Aladdin Manufacturing Corporation Bulked continuous carpet filament manufacturing from polytrimethylene terephthalate
WO2020247609A1 (en) * 2019-06-05 2020-12-10 Aladdin Manufacturing Corporation Methods for manufacturing bulked continuous carpet filament
CN121102953A (zh) * 2024-12-06 2025-12-12 浙江理工大学 一种真空脱挥器

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1283947A (en) * 1915-04-24 1918-11-05 Rubber Regenerating Co Treatment of materials.
US2369553A (en) * 1943-04-29 1945-02-13 Du Pont Extrusion apparatus
AT201039B (de) * 1952-02-11 1958-12-10 Hans Carl Dipl Ing Bechtler Verfahren zum Betrieb von Dünnschichtverdampfern und Dünnschichtverdampfer zur Durchführung des Verfahrens
BE517520A (enExample) * 1952-02-11
DE1114784B (de) * 1954-10-22 1961-10-12 Samesreuther U Co G M B H Duennschichtverdampfer zum Verdampfen und Destillieren von temperaturempfindlichen Flessigkeiten
GB836133A (en) * 1957-01-03 1960-06-01 Ici Ltd Improvements in the extrusion of organic thermoplastic materials
NL100736C (enExample) * 1957-01-22 1900-01-01
US2992679A (en) * 1958-12-15 1961-07-18 Standard Oil Co Vented extruder structure for removing volatiles from solid polymer
US3067812A (en) * 1959-03-23 1962-12-11 Monsanto Chemcial Company Apparatus for devolatizing viscous fluids

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112304056A (zh) * 2020-10-16 2021-02-02 阜阳市鑫悦塑业科技有限公司 一种用于环保塑料制品加工的烘干装置

Also Published As

Publication number Publication date
BE626177A (enExample) 1900-01-01
US3217783A (en) 1965-11-16
NL287054A (enExample) 1900-01-01
CH424260A (de) 1966-11-15
DE1168076B (de) 1964-04-16

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