IT992377B - Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili - Google Patents

Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili

Info

Publication number: IT992377B
Authority: IT; Italy
Prior art keywords: preventively; polyethylene; joint; procedure; polyolefin resins
Prior art date: 1973-05-30

Application number

IT41588/73A

Other languages

English (en)

Original Assignee

Casellato Raoul

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.)

1973-05-30

Filing date

1973-05-30

Publication date

1975-09-10

1973-05-30 Application filed by Casellato Raoul filed Critical Casellato Raoul

1973-05-30 Priority to IT41588/73A priority Critical patent/IT992377B/it

1974-05-28 Priority to FR7418894A priority patent/FR2231877A1/fr

1974-05-29 Priority to DE19742426347 priority patent/DE2426347A1/de

1975-09-10 Application granted granted Critical

1975-09-10 Publication of IT992377B publication Critical patent/IT992377B/it

Links

IHPYMWDTONKSCO-UHFFFAOYSA-N 2,2'-piperazine-1,4-diylbisethanesulfonic acid Chemical compound OS(=O)(=O)CCN1CCN(CCS(O)(=O)=O)CC1 IHPYMWDTONKSCO-UHFFFAOYSA-N 0.000 title 1
239000007990 PIPES buffer Substances 0.000 title 1
-1 POLYETHYLENE Polymers 0.000 title 1
239000004698 Polyethylene Substances 0.000 title 1
239000000853 adhesive Substances 0.000 title 1
230000001070 adhesive effect Effects 0.000 title 1
230000000149 penetrating effect Effects 0.000 title 1
229920000573 polyethylene Polymers 0.000 title 1
229920005672 polyolefin resin Polymers 0.000 title 1

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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
- B29C66/91218—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods using colour change, e.g. using separate colour indicators
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0222—Mechanical pre-treatments, e.g. reshaping without removal of material, e.g. cleaning by air blowing or using brushes
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/022—Mechanical pre-treatments, e.g. reshaping
- B29C66/0224—Mechanical pre-treatments, e.g. reshaping with removal of material
- B29C66/02245—Abrading, e.g. grinding, sanding, sandblasting or scraping
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/028—Non-mechanical surface pre-treatments, i.e. by flame treatment, electric discharge treatment, plasma treatment, wave energy or particle radiation
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
- B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/52—Joining tubular articles, bars or profiled elements
- B29C66/522—Joining tubular articles
- B29C66/5229—Joining tubular articles involving the use of a socket
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
- B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
- B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/90—Measuring or controlling the joining process
- B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
- B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
- B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
- B29C66/91431—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature the temperature being kept constant over time
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
- 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
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/08—Surface shaping of articles, e.g. embossing; Apparatus therefor by flame treatment ; using hot gases
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/485—Multi-component adhesives, i.e. chemically curing as a result of the mixing of said multi-components

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Physics & Mathematics (AREA)
Thermal Sciences (AREA)
General Engineering & Computer Science (AREA)
Plasma & Fusion (AREA)
Chemical & Material Sciences (AREA)
Chemical Kinetics & Catalysis (AREA)
General Chemical & Material Sciences (AREA)
Lining Or Joining Of Plastics Or The Like (AREA)
Adhesives Or Adhesive Processes (AREA)
Manufacture Of Macromolecular Shaped Articles (AREA)

IT41588/73A 1973-05-30 1973-05-30 Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili IT992377B (it)

Priority Applications (3)

Application Number	Priority Date	Filing Date	Title
IT41588/73A IT992377B (it)	1973-05-30	1973-05-30	Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili
FR7418894A FR2231877A1 (en)	1973-05-30	1974-05-28	Bonding smooth polyolefin surfaces together - by heating and applying cross-linking adhesive
DE19742426347 DE2426347A1 (de)	1973-05-30	1974-05-29	Verfahren zum verkleben miteinander von glatten flaechen von auf polyolefinharzbase hergestellten blaettern, filmen und rohren

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
IT41588/73A IT992377B (it)	1973-05-30	1973-05-30	Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili

Publications (1)

Publication Number	Publication Date
IT992377B true IT992377B (it)	1975-09-10

Family

ID=11251621

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
IT41588/73A IT992377B (it)	1973-05-30	1973-05-30	Procedimento per l attacco di superfici di resine poliolefiniche preventivamente rese porose median te un adesivo strutturale penetran te nei pori particolarmente per la giunzione di tubi di polietilene o simili

Country Status (3)

Country	Link
DE (1)	DE2426347A1 (it)
FR (1)	FR2231877A1 (it)
IT (1)	IT992377B (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4441947A (en) *	1982-04-12	1984-04-10	The Procter & Gamble Company	Articulated fabric formed by self-assembling fibers
CA1243169A (en) *	1984-07-09	1988-10-18	Michael L. Osgar	Welding fluoropolymer pipe and fittings
FR2617760B1 (fr) *	1987-07-10	1989-11-24	Souriau & Cie	Procede d'assemblage de pieces en materiaux polymeres
US7489843B2 (en)	2007-02-06	2009-02-10	Adc Telecommunications, Inc.	Polyurethane to polyethylene adhesion process

1973
- 1973-05-30 IT IT41588/73A patent/IT992377B/it active
1974
- 1974-05-28 FR FR7418894A patent/FR2231877A1/fr active Granted
- 1974-05-29 DE DE19742426347 patent/DE2426347A1/de active Pending

Also Published As

Publication number	Publication date
FR2231877B3 (it)	1977-03-25
DE2426347A1 (de)	1974-12-19
FR2231877A1 (en)	1974-12-27

Publication	Publication Date	Title
IT1019026B (it)	1977-11-10	Apparecchiatura per la giunzione di tubazioni sottomarine
ES530880A0 (es)	1984-11-01	Procedimiento para la aplicacion fluida de pliegos
BR8202380A (pt)	1983-04-05	Aparelho para cimentar um revestimento no fundo de um furo de poco subterraneo
DK224582A (da)	1982-11-19	Fremgangsmaade til fremstilling af hindebelagt skum
AT318313B (de)	1974-10-10	Abdichtung für den Innenraum einer Drehgelenkkupplung
DK111782A (da)	1982-09-15	Foring af roerformede konstruktioner
IT8020228A0 (it)	1980-02-28	Procedimento per promuovere l'adesione di poliolefine ad altrimateriali.
ES518511A0 (es)	1984-03-01	Un procedimiento para la preparacion de compuestos dotados de propiedades psicotropicas.
IT961517B (it)	1973-12-10	Protesi per la plastica dei tubi falloppiani
ES505148A0 (es)	1982-12-01	Procedimiento para la preparacion de composicionexs de caucho para la union directa a superficies de metal.
IT956403B (it)	1973-10-10	Procedimento per la giunzione di materiali solidi
DK157374C (da)	1990-05-14	Remstrammer med fluidumdaempningsorgan
FR2553860B1 (fr)	1986-08-14	Tube flexible utilisable notamment pour le transport de fluides caloporteurs ou frigorifiques
DK534580A (da)	1982-06-17	Beslag til brug ved montering af bjaelkelignende kanaler under vandrette flader navnlig lofter
DK136788B (da)	1977-11-21	Trækfast rørsamling for sammenføjning af to rørelementer, hvis indhold er under tryk.
BR7207777D0 (pt)	1973-09-13	Revestimento para preencher juntas de di latacao de construcoes
NL185952B (nl)	1990-03-16	Warmtegeisoleerde buisleiding met buitenbeschermmantel.
IT7930647U1 (it)	1980-08-23	Giunto particolarmente per la connessione tra due tubi di materiale diverso
IT8421433A1 (it)	1985-12-15	"Raccordo che consente lo spostamento angolare dei tubi raccordati"
IT8235618U1 (it)	1983-08-19	Giunto per la realizzazione di strutture portanti
ES489951A0 (es)	1981-04-16	Un procedimiento para la preparacion de una composicion pes-ticida fluida
ES219231Y (es)	1977-03-01	Junta hermetica para la union de tuberias.
ES149223Y (es)	1970-05-16	Nueva disposicion para la union de conducciones tubulares.
IT7404803U1 (it)	1976-03-13	Giunto per tubi, in particolare per la realizzazione di strutture spaziali per l'arredamento
DK157542C (da)	1990-06-25	Fremgangsmaade til fremstilling af m-hydroxyphenyl-substituerede forbindelser samt 2-halogen-3-oxo-cyclohex-1-enylforbindelser til brug som udgangsmaterialer herved.