# US 9,751,249 B2 · Device for blow molding containers > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,249 B2 - Document ID: US9751249B2 - Status: Granted - Kind: B2 - Application number: 14/903,527 - Filed: 2014-07-11 - Published: 2016-06-09 - Granted: 2017-09-05 - Earliest claimed: 2013-07-19 - Assignees: Khs Corpoplast GmbH - Applicants: KHS Corpoplast GmbH - Inventors: Michael Litzenberg; Rolf Baumgarte; Margit Kiefer; Frank Lewin; Michael Linke - Web page: https://patentgrep.com/patent/US9751249B2 ## CPC - B29C 49/58: Blowing means - B29C 49/06: Injection blow-moulding - B29C 2049/4294: {Sealing means} - B29C 2049/5803 - B29K 2067/003: {PET, i.e. poylethylene terephthalate} - B29L 2031/7158: {Bottles} - 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) - 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 A device for blow molding containers. Preheated preforms made of a thermoplastic material are transferred within a blow molding machine to a blowing device. In the region of the blowing device, the preforms are shaped into containers by the blow molding by a blowing pressure. In the region of the device for blow molding containers, a blowing nozzle seal is arranged, which is brought against a support ring of the preform. The blowing nozzle seal is formed by a sealing element and a support sleeve. The blowing nozzle seal is first mechanically preloaded in relation to the support ring after contact with the support ring and then is further loaded pneumatically. An accommodating space that surrounds the mouth section of the preform is thereby provided, which accommodating space has substantially the same pressure as the interior of the preform in order to avoid deformation of the mouth section. ## Claims ### Claim 1 A device for blow-molding containers, comprising: a blowing nozzle head; and a blowing nozzle seal with a sealing surface at one end and a concavity, wherein the blowing nozzle seal and the blowing nozzle head are configured so that a space, in which pressure can be built up, is formed by contact of the sealing surface against a support ring of a mouth of a preform or container, wherein the blowing nozzle seal is formed by a sleeve-shaped sealing element and a support sleeve that surrounds the sealing element, wherein the support sleeve is movable inside the blowing nozzle head. ### Claim 2 (depends on 1) A device for blow-molding containers according to claim 1, wherein the sealing element comprises a snap-in hook fastening that cooperates with the support sleeve so that the sealing element is held in place inside the support sleeve. ### Claim 3 (depends on 1) A device for blow-molding containers according to claim 1, wherein the sealing element comprises a concavity that is configured geometrically so that a space open to the blowing nozzle head is surrounded. ### Claim 4 (depends on 1) A device for blow-molding containers according to claim 1, wherein the sealing element comprises a concavity that is configured geometrically so that the concavity is arranged at an end of the sealing element and comprises a sealing lip that has an end surface that rests against a contact surface on the blowing nozzle head. ### Claim 5 (depends on 3) A device for blow-molding containers according to claim 3, wherein the sealing element comprises a concavity that is configured geometrically so that, when pressure is applied to the space, a deformation occurs, which brings about a stretching of the sealing element axially toward an insertion opening of the container and as a result realizes pressing forces at a contact between the sealing surfaces. ### Claim 6 (depends on 1) A device for blow-molding containers according to claim 1, wherein the sealing element comprises a concavity that is configured geometrically so that, when axial force acts on the sealing surface, the sealing element deflects inward toward a contact surface of the blowing nozzle head. ### Claim 7 (depends on 1) A device for blow-molding containers according to claim 1, wherein the support sleeve comprises a collar. ### Claim 8 (depends on 7) A device for blow-molding containers according to claim 7, wherein the blowing nozzle head includes an external element, the collar being guided movably in the external element by a loose fit, and a cavity between the concavity and the external element is vented to surrounding space through the loose fit. ### Claim 9 (depends on 8) A device for blow-molding containers according to claim 8, wherein the loose fit is dimensioned so that an extrusion of the sealing element into the loose fit during action of the blowing pressure is prevented. ### Claim 10 (depends on 1) A device for blow-molding containers according to claim 1, wherein the blowing nozzle head comprises an external element and a blowing nozzle insert. ### Claim 11 (depends on 10) A device for blow-molding containers according to claim 10, wherein the blowing nozzle insert comprises at least one through-bore for connecting a blowing pressure feed of the blowing nozzle insert to the space. ### Claim 12 (depends on 1) A device for blow-molding containers according to claim 1, wherein the support sleeve is metal or plastic. ### Claim 13 (depends on 1) A device for blow-molding containers according to claim 1, wherein the sealing element is made of an elastomeric material. ### Claim 14 (depends on 1) A blowing air control block in a blowing station, comprising at least one device for blow-molding containers according to claim 1.