# US 4,380,299 A · Tamper proof closure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 4,380,299 A - Document ID: US4380299A - Status: Granted - Kind: A - Application number: 06/185,889 - Filed: 1980-09-10 - Granted: 1983-04-19 - Earliest claimed: 1980-09-10 - Assignees: Precision Plastic Products Corp. - Inventors: Santos A. A. Alejandro Llera - Web page: https://patentgrep.com/patent/US4380299A ## CPC - B65D 41/3442: {with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container (B65D41/3404 takes precedence)} - B29C 45/2618: {having screw-threaded mould walls} - B29D 1/00: Producing articles with screw-threads - 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 - 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) ## Abstract A tamper proof closure for use in combination with a threaded container for spirits or liquor having a retaining means thereon, with said closure having an internally threaded straight side wall and a breakaway portion located thereon which is adapted to slide over the retaining means on the container, the breakaway portion being separated from the remainder of the side wall by a serrated line, said portion being provided with a continuous circumferential extending wedge shaped ring having locking lugs located thereon which are adapted to engage the retaining means to cause the breakaway portion to become detached from the side wall and remain on the container so as to indicate to the consumer tampering thereof. ## Claims ### Claim 1 A tamper proof closure for use in combination with a container with a neck finish having a threaded portion and a retaining means therebelow having a bottom surface, said closure comprising: a body having a substantially straight side wall having an inner surface with an internally threaded portion located on said inner surface and a breakaway portion therebelow; a frangible portion connecting said breakaway portion to said side wall; said breakaway portion adapted to slide over said retaining means as the closure is threaded onto the container and having a ring adapted to be disposed below of and adjacent to said retaining means when said closure is fully threaded onto the container; said ring having located thereon at least one locking means adapted to engage the bottom surface of the retaining means to secure the closure in place when the closure is fully threaded onto the container; whereby when the closure is unthreaded from the container, the breakaway portion will be severed from the body at the frangible portion by the retaining means acting on the ring leaving said breakaway portion on said container as an indication of tampering. ### Claim 2 (depends on 1) The closure is accordance with claim 1 wherein the frangible portion is formed by an undercut in the sidewall which extends outwardly from said inner face. ### Claim 3 (depends on 1) The closure is accordance with claim 1 wherein said inner face and said neck finish are free of steps. ### Claim 4 (depends on 1, 2, 3) The closure is accordance with claims 1, 2 or 3 in which said ring has an upper and lower surface with said locking means located on said upper surface and said frangible portion located adjacent said upper surface. ### Claim 5 (depends on 4) The closure in accordance with claim 4 wherein said ring is wedge shaped with said upper and lower surfaces forming adjacent sides of said wedge with the thickest portion of said ring being at the apex of the wedge. ### Claim 6 (depends on 5) The closure in accordance with claim 5 wherein said locking means has an upper surface substantially normal to said side wall and adjacent to said frangible portion, the bottom surface of the retaining means being normal to the center axis of the container, wherein said upper surface of the locking means is adapted to engage said bottom surface of the retaining means to secure the closure in place when the closure is completely threaded onto the container. ### Claim 7 (depends on 6) The closure in accordance with claim 6 wherein the retaining means includes an upper surface which angles downwardly and away from said container terminating at the bottom surface facilitating the sliding of the breakaway portion thereover. ### Claim 8 (depends on 7) The closure in accordance with claim 7 wherein the upper surface of the retaining means angles downward at approximately 45.degree. with respect to the center axis of the container and the upper and lower surfaces of the ring angle toward each other at approximately 59.degree. with respect to the side wall of the container. ### Claim 9 (depends on 1) The closure in accordance with claim 1 wherein said container has a neck ring located below said retaining means with the breakaway portion located between said neck ring and retaining means when the closure is fully threaded onto the container. ### Claim 10 (depends on 9) The closure in accordance with claim 9 wherein the neck ring and retaining means are formed so as to inhibit removal of the breakaway portion from the container when said portion is located between the ring and means. ### Claim 11 (depends on 1) The closure in accordance with claim 1 wherein said closure is a single piece of intergral construction. ### Claim 12 (depends on 2) The closure in accordance with claim 2 wherein said side wall has located on its external surface a plurality of ribs, and said frangible portion extends outwardly to said ribs. ### Claim 13 (depends on 1) The closure in accordance with claim 1 wherein said breakaway portion is formed so as to permit the closure to be unscrewed from its forming apparatus without severing said frangible portion. ### Claim 14 (depends on 13) The closure in accordance with claim 13 wherein said locking means is formed having a surface essentially smooth at a first point with the upper surface of the ring and gradually raised from said upper surface of the ring to a second point with the rotational direction for unscrewing the closure from the forming apparatus being in the direction of the second point to the first point. ### Claim 15 (depends on 1) The closure in accordance with any one of claim 1 wherein said closure is linerless and includes a dome from which extends said side wall and said closure is constructed of a plastic material. ### Claim 16 A tamper proof closure for use in combination with a container with a neck finish having a threaded portion and a retaining means therebelow, said closure comprising: a body having a substantially straight side wall having an inner surface with an internally threaded portion located on said inner surface; a breakaway portion with a frangible portion connecting said breakaway portion to said side wall; said breakaway portion adapted to slide over said retaining means as the closure is threaded onto the container and having a ring thereon; said ring being positioned on the closures interior and approximating a wedge shape configuration having upper and lower surfaces; said containers neck having a retaining means thereon, said retaining means includes a flange having an upper surface which slopes downwardly and projects outwardly toward frangible portion terminating in a bottom surface, said container having an annular bead located below said bottom surface with the ring located between said annular bead and said bottom surface when the closure is fully placed on the container, and said bead, ring and retaining means being of close dimensional tolerances such that the ring is substantially fixed therebetween thereby inhibiting the introduction of an implement therebetween so as to prevent prying off of the ring from the container; and whereby when the closure is unthreaded from the container, the breakaway portion will be severed from the body at the frangible portion by the retaining means acting on the ring leaving said breakaway portion on said container as an indication of tampering. ### Claim 17 (depends on 16) The closure in accordance with claim 16 wherein the frangible portion is formed by an undercut in the sidewall which extends outwardly from said inner surface. ### Claim 18 (depends on 16, 17) The closure in accordance with claims 16 or 17 wherein said inner face and said neck finish are free of steps. ### Claim 19 (depends on 16, 17) The closure in accordance with claims 16 or 17 wherein the upper surface of the retaining means angles downward at approximately 45.degree. with respect to the center axis of the container and the upper and lower surfaces of the ring angle toward each other at approximately 59.degree. with respect to the side wall of the container. ### Claim 20 (depends on 16, 17) The closure in accordance with claims 16 or 17 wherein said closure is a single piece of integral construction formed from a plastic material. ### Claim 21 (depends on 16, 17) The closure in accordance with claims 16 or 17 wherein said side wall has located on its external surface a plurality of ribs, and said frangible portion extends outwardly to said ribs. ### Claim 22 A tamper proof closure for use in combination with a container with a neck finish having a threaded portion and a retaining means therebelow having a bottom surface, said closure comprising: a body having a substantially straight side wall having an inner surface with an internally threaded portion located on said inner surface and a plurality of ribs on its outer surface; a breakaway portion with a frangible portion connecting said breakaway portion to said side wall, said frangible portion extends outwardly to said ribs; said breakaway portion adapted to slide over said retaining means as the closure is threaded onto the container and having a ring adapted to be disposed below of and adjacent to said retaining means when said closure is fully threaded onto the container; said ring being positioned on the closures interior and adapted to be disposed adjacent to the bottom surface of the retaining means when the closure is fully threaded onto the container; whereby when the closure is unthreaded from the container, the breakaway portion will be severed from the body at the frangible portion by the retaining means acting on the ring leaving said breakaway portion on said container as an indication of tampering. ### Claim 23 (depends on 22) The closure in accordance with claim 22 wherein the frangible portion is formed by an undercut in the side wall which extends outwardly from said inner surface. ### Claim 24 (depends on 22) The closure in accordance with claim 22 wherein said plurality of ribs are vertically positioned on said side wall and said frangible portion being normal to said ribs. ### Claim 25 (depends on 22, 23, 24) The closure in accordance with claims 22, 23 and 24 wherein said breakaway portion is formed with means to permit the closure to be unscrewed from its forming apparatus without severing said frangible portion. ### Claim 26 A tamper proof closure for use in combination with a container with a neck finish having a threaded portion and a retaining means therebelow having a bottom surface, said closure comprising: a top and bottom end with said closure having an uninterrupted outer surface from its top to bottom end; a body having a substantially straight side wall downwardly extending from the top end having an inner surface with an internally threaded portion located on said inner surface; a breakaway portion positioned at the bottom end with a frangible portion connecting said breakaway portion to said side wall; said frangible portion being formed by an undercut in the side wall which extends outwardly from said inner surface; said breakaway portion adapted to slide over said retaining means as the closure is threaded onto the container and having a ring adapted to be disposed below of and adjacent to said retaining means when said closure is fully threaded onto the container; said ring being positioned on the closures interior and being adapted to be disposed adjacent to the bottom surface of the retaining means when the closure is fully threaded onto the container; and whereby when the closure is unthreaded from the container, the breakaway portion will be severed from the body at the frangible portion by the retaining means acting on the ring leaving said breakaway portion on said container as an indication of tampering.