# US 2014/0190925 A1 · Bi-injected cap, and method for manufacturing such a cap > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0190925 A1 - Document ID: US20140190925A1 - Status: Published application - Kind: A1 - Application number: 14/008,295 - Filed: 2012-03-29 - Published: 2014-07-10 - Earliest claimed: 2011-03-29 - Assignees: Bericap - Inventors: Anne-Cecile Ropele - Web page: https://patentgrep.com/patent/US20140190925A1 ## CPC - B29C 45/0003: {of successively moulded portions rigidly joined to each other} - B29C 45/1635: {using displaceable mould parts, e.g. retractable partition between adjacent mould cavities} - B29D 99/0096: {Producing closure members for containers, e.g. closure caps or stoppers} - B65D 41/0407: {with integral sealing means (B65D41/065 takes precedence)} - B65D 41/325: {with integral internal sealing means} - B65D 41/3447: {the tamper element being integrally connected to the closure by means of bridges} - B65D 53/06: Sealings formed by liquid or plastic material - B29C 45/1676: {using a soft material and a rigid material, e.g. making articles with a sealing part} - B29C 2045/1678: {first moulding the soft material} - B29L 2031/565: {for containers} - B29L 2031/772: {Articles characterised by their shape and not otherwise provided for (closed loop B29L2031/709; ring-like B29L2031/7096; corrugated B29L2016/00, flat B29L2007/00; hollow B29L2022/00; screw-threaded B29L2001/00; toothed B29L2031/775; corrugated tubes B29L2023/18)} - 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) - B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00) - 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 - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract The disclosure includes a cap having a first portion made of a plastic material and forming a bottom for covering a container neck and a protective side wall for surrounding the container neck, and a second portion made of a flexible material that is compatible with the plastic material of the first portion and separate from the plastic material of the first portion, the second portion being annular and consisting of a flexible seal, which projects from the bottom toward the interior of the side wall and which is welded to the first portion. Thus, the manufacture of the stopper by molding includes injecting a flexible material to produce the flexible annular seal and then the movable portions of the mold are placed such that the flexible material is in a groove that is set back from the planar surface of the mold. ## Claims ### Claim 1 A cap comprising: a first portion made of a plastic material, forming a bottom for covering a container neck and a protective side wall for surrounding the container neck, the first portion including two annular grooves separated by an annular protuberance; and a second portion made of a flexible material that is compatible with the plastic material of the first portion and separate from the plastic material of the first portion, the second portion being annular and consisting of a flexible seal, which projects from the bottom toward the interior of the side wall and which is welded to the first portion, the second portion being welded to the annular protuberance. ### Claim 2 (canceled) ### Claim 3 (depends on 1) The cap of claim 1, wherein the flexible material is an elastomer material. ### Claim 4 (depends on 1) The cap of claim 1, wherein the plastic material is a thermoplastic. ### Claim 5 (depends on 1) The cap of claim 1, wherein the side wall includes an inner thread to screw on an outer thread of the neck of the container. ### Claim 6 (depends on 1) The cap of claim 1, wherein the first portion forms a primary annular sealing skirt protruding from the bottom and positioned radially inside the side wall, the primary sealing skirt being intended to bear radially against an inner cylindrical wall of the neck of the container, the flexible seal being positioned radially between the side wall ( and the primary sealing skirt. ### Claim 7 (depends on 6) The cap of claim 6, wherein the distance between the primary sealing skirt and the flexible seal, measured radially in a plane perpendicular to the axis of revolution of the side wall, tangent to a weld face between the annular protuberance and the second portion, is greater than 0.5 mm. ### Claim 8 (depends on 6) The cap of claim 6, wherein the primary sealing skirt includes an annular bead in contact with the neck, said bead being located in a free end portion of the sealing skirt and turned radially outward. ### Claim 9 (depends on 6) The cap of claim 6, wherein the primary sealing skirt has a generally flared shape from the bottom toward the free end. ### Claim 10 (depends on 6) The cap of claim 6, wherein before placement of the cap on the neck, a geometric cylinder which outwardly envelops the primary sealing skirt and has the smallest diameter possible has an intersection with the flexible seal. ### Claim 11 (depends on 1) The cap of claim 1, wherein the flexible seal has a half-circle or half-ellipse profile or a square, rectangular or trapezoidal profile. ### Claim 12 (depends on 1) The cap of claim 1, wherein the side wall of the cap is equipped with a tamperproof ring, connected to the body of the side wall by a frangible annular zone. ### Claim 13 (depends on 12) The cap of claim 12, wherein the first portion forms a primary annular sealing skirt protruding from the bottom and positioned radially inside the side wall, the primary sealing skirt being intended to bear radially against an inner cylindrical wall of the neck of the container, the flexible seal being positioned radially between the side wall and the primary sealing skirt, and wherein the portion of the primary sealing skirt intended to come into contact with the neck of the container and the free end of the flexible seal intended to come into contact with the rim of the neck of the container are situated axially at a distance from one another that is greater than the elongation at break of the frangible zone. ### Claim 14 (depends on 1) The cap of claim 1, wherein the bottom of the cap is provided with a pour spout and forms a part of a cap assembly further including a cover that covers the spout. ### Claim 15 (depends on 1) A container provided with a neck closed by the cap of claim 1, wherein the flexible seal of the cap bears on the neck. ### Claim 16 A method for molding a cap including at least one bottom, a side wall and an annular seal, the method comprising: two parts of the mold, movable relative to one another, are placed so as to form an annular cavity with an injection orifice; a first of these parts having an annular protuberance, the annular protuberance defining an upper wall of the annular cavity, the other part having an annular groove defining a lower wall of the annular cavity, the annular protuberance penetrating the annular groove so as to close the annular cavity; a flexible material is injected into the annular cavity so as to fill the annular cavity; and the two parts of the mold are separated from each other so as to form a primary cavity having a first portion intended to form the bottom of the cap, extended by a second, generally cylindrical portion intended to form the side wall of the cap, the first portion having an inner wall defining the inner face of the bottom of the cap, the annular cavity containing the flexible material emerging in the first portion of the primary cavity. ### Claim 17 (depends on 16) The molding method of claim 16, wherein the injection of the plastic material in the mold is done through an injection orifice aligned with the axis of symmetry of revolution of the annular cavity. ### Claim 18 (depends on 3) The cap of claim 3, wherein the flexible material is a thermoplastic elastomer material. ### Claim 19 (depends on 4) The cap of claim 4, wherein the plastic material is one of: a polyethylene or a polypropylene.