# US 11,305,644 B2 · Method for forming a welding spout on a parison during the blowing of a tank

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- Number: US 11,305,644 B2
- Document ID: US11305644B2
- Status: Granted
- Kind: B2
- Application number: 16/585,545
- Filed: 2019-09-27
- Published: 2020-01-23
- Granted: 2022-04-19
- Earliest claimed: 2013-12-27
- Assignees: Plastic Omnium Advanced Innovation and Research
- Applicants: Plastic Omnium Advanced Innovation and Research
- Inventors: Jean-Francois Coing; Sebastien Jouie; Yvonnig Guezennec; Philippe Coulon; Andre George; Jozef Franko
- Web page: https://patentgrep.com/patent/US11305644B2

## CPC

- B60K 15/04: Tank inlets (B60K15/077 takes precedence)
- B29C 49/20: of articles having inserts or reinforcements {; Handling of inserts or reinforcements}
- B29C 49/22: using multilayered preforms or parisons
- B29C 51/12: of articles having inserts or reinforcements
- B60K 15/03177: {made of non-metallic material, e.g. plastics, or of a combination of non-metallic and metallic material (B60K15/03006 takes precedence)}
- B65D 25/42: Integral or attached nozzles or spouts
- B29C 49/04: Extrusion blow-moulding
- B29C 49/4273: {Auxiliary operations after the blow-moulding operation not otherwise provided for}
- B29C 49/487105: {characterised by the manufacturing process}
- B29C 51/267: {Two sheets being thermoformed in separate mould parts and joined together while still in the mould (B29C49/0691 takes precedence)}
- B29C 2049/2017: {outside the article}
- B29C 2049/2034: {Attachments, e.g. hooks to hold or hang the blown article}
- B29C 2049/2065: {for reinforcing specific areas of the final blow moulded article}
- B29C 2049/4807: {by movable mould parts in the mould halves}
- B29C 2049/4881: {having a mandrel or core e.g. two mould halves with a core in-between}
- B29C 2793/0018: for making a hole
- B29C 2793/009: after shaping
- B29K 2023/065: {HDPE, i.e. high density polyethylene}
- B29K 2023/086: {EVOH, i.e. ethylene vinyl alcohol copolymer}
- B29K 2031/04: {Polymers of vinyl acetate, e.g. PVAc, i.e. polyvinyl acetate}
- B29L 2031/7172: {Fuel tanks, jerry cans}
- B60K 2015/03046: {made from more than one layer}
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

The invention relates to a tank of plastics material produced by blow-molding of a parison, incorporating a welding spout, of a shape projecting from its outer surface which has an edge configured to be welded to a corresponding edge of an attached part, the welding spout ending axially, on an inside of the tank, in a shape resulting from contact molding between the parison and a molding component, in which the welding spout ends axially on an outside of the tank in a shape resulting from contact molding between the parison and a molding component.

## Claims

### Claim 1

A tank of plastics material produced by blow-molding of a multilayer parison comprising at least a barrier layer, incorporating a welding spout, of a shape projecting from the outer surface of the tank,
the welding spout having an external radial shape resulting from contact molding between the parison and a spout mold,
the welding spout ending axially, on an inside of the tank, in a shape resulting from contact molding between the parison and a first molding component, and
in which the welding spout ends axially on an outside of the tank in a shape resulting from contact molding between the parison and a second molding component, the shape having an edge configured to be welded to a corresponding edge of an external attached part,
the second molding component being different from the first molding component, both being configured to contact the multilayer parison during blow-molding allowing the edge to be welded of the welding spout to be distant from the barrier layer of the multilayer parison.

### Claim 2 (depends on 1)

The tank as claimed in claim 1, wherein the welding spout ends axially on the inside of the tank in an internal rim in a shape of a ring.

### Claim 3 (depends on 1)

The tank as claimed in claim 1, wherein the welding spout ends axially on the outside of the tank in a radial flat surface in a shape of a ring.

### Claim 4 (depends on 3)

The tank as claimed in claim 3, wherein the welding spout comprises an internal rim in a shape of a ring set back from the flat radial surface.

### Claim 5 (depends on 1)

The tank as claimed in claim 1, wherein the welding spout has a shape.