Abstract: An improved full-open type of convenience closure includes an end panel having a peripheral score defined therein to define fixed and removable end panel portions, a tab having a nose portion for exerting a downward force on the end panel adjacent the peripheral score, a rivet formation for securing the tab to the end panel, and a moustache score for, among other purposes, providing a pivot point for the tab. The rivet formation includes a raised area on the end panel which is defined by an outer edge. The moustache score is curved away from the peripheral score at the point where it intersects the outer edge, thereby preventing tearing along the outer edge during opening.

Abstract: Methods and apparatus for forming a convenience-feature, sheet metal end closure structure (133) for a container body (153) having a non-cylindrical side wall. A new scoring tool (94) configuration enables a peripheral scoreline (102) defining a separable convenience-feature panel (112) to be located contiguous to the closure chuck wall (100) which interfits about its entire periphery with the open end of the side wall of such a container. Separation of such panel leaves substantially no obstruction to removal of solid-pack container. The separable panel (112) is formed with a multiple-layer fold (127) of sheet metal which is nested against the interior periphery of such panel, so as to shield torn residual metal remaining with the panel after severance along such peripheral scoreline.

Abstract: The can end closure member includes a removable central panel for opening the can, and a stepped panel portion allowing the can to be opened by means of a conventional can opener. The stepped panel portion has an angled configuration which recesses the scoreline of the central panel and protects the scoreline from shocks during shipping and handling. The stepped panel portion also includes a ledge portion which serves as a seat for stacking another can on the stepped panel portion without bearing upon the scoreline or the central panel.

Abstract: A convenience-feature full-open end closure structure (27) with a shock-absorbing bead (45) located between a peripheral scoreline (34) which defines the end wall disc (31) to be removed from a recessed end wall panel (49). An arch-shaped back scoreline means with central vent portion (36) and legs (37, 38) is located within the removable disc (31) and co-acts with a longitudinally rigid (non-lanced) opener (30) which is made integral by a rivet (32) formed from sheet metal of disc (31). A multi-layer sheet metal fold (40) shields the raw edge of ruptured residual peripheral scoreline metal which remains with disc (31); and a multi-layer sheet metal fold (42) shields residual raw-edge metal remaining with container (94). The back scoreline central portion (36) is contiguous to and radially inward of rivet (32) and the pair of legs (37, 38) extend with a radially-directed component on opposite sides of the rivet toward the adjacent portion of the peripheral chime seam (92).

Abstract: A non-removable fulcrum-type lift tab, for opening a metal beverage container, is modified, by the inclusion of a lanced line at a position between the fulcrum pivoting line and the pushing end of the tab. The lanced line extends in a direction substantially perpendicular to the fulcrum-directed pushing force used to open the container, whereby, upon initial lifting of the tab, the lanced line opens, in a limited material separation. This results in substantially less lifting force (about 30% less), being needed to elevate the tab end about 1/4 inch (about 6 mm) for a finger to be more easily inserted for completion of the opening of the container. At this stage, the ends of the lanced line, such as in the configuration of drilled holes or inwardly arcuate lanced sections, stop continued material separation by providing a high resistance to such separation.

Abstract: An improved easy open can end having a retained tear strip extending diametrically partly across the can end defined by a score line, and a graspable pull tab adjacent and outside the open end of the score line. The pull tab is attached to the can end by means of a rivet, the can end around the base of the rivet being deformed so as to slightly tilt the rivet toward the finger end of the pull tab. Accordingly, initial lifting of the pull tab is fully directed to the initial fracture of the score line immediately in front of the rivet, thereby ensuring desirable venting action of internal pressure and allowing opening of the can end with less effort.

Abstract: Fail safe externally-applied releasible locks and internally-disposed seals for capped centrifuge containers, cryogenic vials and the like to insure closure integrity against specimen loss in whole or in part and contamination, the containers with cap being suitable for use in centrifuging, boiling and freezing of liquid specimens and during shipping.

Abstract: An improved easy open can end having a retained tear strip extending diametrically partly across the can and defined by a score line, and a graspable pull tab adjacent and outside the open end of the score line. The pull tab is attached to the can end by means of a rivet, the can end around the base of the rivet being deformed so as to slightly tilt the rivet toward the finger end of the pull tab. Accordingly, initial lifting of the pull tab is fully directed to the initial fracture of the score line immediately in front of the rivet, thereby ensuring desirable venting action of internal pressure and allowing opening of the can end with less effort.

Abstract: An easily-openable container lid made from a laminate material which includes a thick outer thermoplastic layer, a thin intermediate gas barrier layer, preferably of metallic foil, and a heat-sealable inner coating or film layer. A score line extends only partially through the outermost layer of this container lid to define an openable section thereof. The lid is further provided with a pull tab severing laminate material along its score line without delaminating, said tab being affixed to the openable lid section with a hollow, integrally-formed rivet. A retortable container and laminate lid combination is also disclosed.

Abstract: An easy-open beverage container which can be selectably reclosed and reopened, after the container initially is opened. The reclosure structure may be contained on an opening tab, or alternatively may be separate from the tab.

Abstract: An easy-open beverage container which can be selectably reclosed and reopened, after the container initially is opened. The reclosure structure may be contained on an opening tab, or alternatively may be separate from the tab.

Abstract: A circular "pop-top" can has a multilayer foil (19) and resin (20, 21) base 4, on the upper surface of which a rigid injection molded resin layer 5 is formed. An elliptical groove 6 surrounds a semicircular pedestal 8 extended inwardly by a U-shaped projection 9 having score lines 18 extending across its legs. The butt of a pull tab 12 is fixed to the pedestal such that upon lift up the tab and pedestal pivot downwardly about the score lines to rupture the exposed base at the groove.

Abstract: An easy-open beverage container which can be selectably reclosed and reopened, after the container initially is opened. The reclosure structure may be contained on an opening tab, or alternatively may be separate from the tab.

Abstract: An easy-open beverage container which can be selectably reclosed and reopened, after the container initially is opened. The reclosure structure may be contained on an opening tab, or alternatively may be separate from the tab.

Abstract: A full-open, disc-removal, end wall structure (25) with improved easy-open lever action and edge-protection features is disclosed along with methods of fabricating and opening. A back-scoreline (38, 52) is ruptured, by Class 2 lever action, upon lifting of a rigid (non-lanced) tap opener (28, 51, 63) as the working end (32) of the tab opener ruptures a portion of peripheral scoreline (33); continued movement of the tab opener in the direction (46) into contact with chime seam (47) provides for continued lever-action rupture of the peripheral scoreline by Class 1 lever action about the chime seam as a fulcrum. Multi-folds of sheet metal provide rounded edge metal (73, 78) shilding for residual scoreline metal; pre-folding of the metal is carried out while leaving access for scoring tooling (86, 88) to enable scoring on a single thickness of sheet metal; and so as to avoid premature damage to the residual scoreline metal upon final orientation.

Abstract: A full open end includes a score line that defines a removable panel which has a tab and the removable panel secured thereto by an integral rivet. The end has anti-rotation members between the tab to prevent rotation of the tab about the rivet.

Abstract: The invention relates to a tool for opening a can with a top which is easy to open whereby the tool is directly connected to the top. Cans of this type can be opened easily with the tool according to the invention, as once the breaking of the weak line of the top has been initiated by an incision with the pointed end of the tool, the tool is turned sideways through the point of connection with the top, after which the ringed end portion of the tool is rotated like a key for opening cans until the weakened area of the top has been completely detached.

Abstract: A pull-tab for an easy-to-open can container is mounted on a lid provided at an opening of a partially-open type container that contains a liquid such as a refreshing beverage. The pull-tab is fixed by a rivet at a predetermined portion of a removable portion surrounded by a score provided on the lid. A dish-like or bowl-like recessed portion is formed around the peripheral edge of a rivet insertion hole of the pull-tab. The peripheral edge of the rivet insertion hole is turned upward along the peripheral wall of the recessed portion to form a horizontally turned portion. A reinforcing edge is provided around the entire peripheral edge of the pull-tab with the exception of the distal end portion at a portion thereof at which the rivet insertion hole is provided. The length of this portion at which no reinforcing edge is provided is made smaller than the outer diameter of the recessed portion. Therefore, it is possible to efficiently prevent the pull-tab coming off the rivet when the container is opened.

Abstract: Pull tabs for easy open containers are fabricated so as to avoid the presence of burrs after severing the carrier lugs, by removing each tab from the carrier sheet by severing each lug and a portion of the tab next adjacent the lug extremity, so that the burrs are avoided. Each radius has a dimension along the periphery of the tab which is slightly greater than the width of the severed lug, and with each radius located along a portion of the periphery of the tab which remains uncurled during the fabrication process.

Abstract: A full-open, disc-removal, convenience-feature end wall closure with raw edge metal protection and improved easy-open features includes a peripherally-located scoreline defining the disc to be removed, a back scoreline located within the disc and a longitudinally rigid (non-lanced) opener made integral with the disc by a rivet. A multi-layer fold of sheet metal contiguous to the peripheral scoreline shields residual scoreline metal which remains with the disc.

Abstract: A cover for a can comprising a multi-layer base of aluminum foil between heat-fusible resin layers and an overlying laminated resin layer. The outer resin layer has an inner section and a surrounding outer section separated by a gap through which the multi-layer base is exposed. The gap is smooth and continuous, that is, does not have a point, so that the inner section can be leveraged into the multi-layer base and the stress is uniformly distributed over a wide area of the multi-layer base.

Abstract: There is provided a metal tear-open lid, in particular, made of very thin sheet material wherein by means of a U-shaped recess provided in the tear-open starting section the area where the pull-open ring is fastened to the tear-open portion is reliably prevented from bulging like a membrane as the lid is initially broken up.

Abstract: A container lid having a removable portion which can be torn off by a tear tab. It has an upwardly projecting wall defining the periphery of the removable portion and formed by bending the plate from which the lid is formed. The wall protects a person opening the container against any injury by the torn edge of the removable portion. The wall also contributes to reducing the force which is required for tearing off the removable portion.

Abstract: There is provided a tin lid for use with cans of oblong shape in Hansa format, which includes in its lid image section a tear-open portion defined by a self-contained recessed line capable of being broken up at one end of the lid by means of a pull-open ring attached to this end. At the other end, said recessed line includes a straight recessed line portion which extends in chordal-type fashion with respect to the core wall shaped like an arc of a circle and which is positioned perpendicular and symmetrically to the longitudinal lid center line and is further connected with the other recessed line components through an also chordal-type or polygonal recessed line connecting portion.

Abstract: A method of forming an integral rivet in a sheet metal panel by successively coining portions circumscribing a central portion thereof so that the end panel stock is not stretched and a long shanked rivet is produced. The rivet has a relatively thin wall shank and a relatively thick crown which provides sufficient metal for staking into a rivet head having a wide formable flange.

Abstract: An easy-open beverage container which can be selectably reclosed and reopened, after the container initially is opened. The reclosure structure may be contained on an opening tab, or alternatively may be separate from the tab.

Abstract: One-piece sheet metal can body and end closure structure for assembly of a two-piece can with full-panel convenience feature and protection for residual scoreline metal edge after opening; a tamper-proof non-breakable container with full access for various types of food is provided. A stepped-flange rim on the can body and a U-shaped groove in the end panel, for submerging the scoreline, shield severed edge metal.

Abstract: An easy-to-open lid for a liquid container containing, for example, a refreshing beverage has a lid panel provided with a score line defining a severable area. The lid panel has a rivet integral therewith and anchoring a pull-tab adapted to be pulled by a finger. The lid further has at least one stiffening dimple formed in the severable area of the lid panel such as to resist the bending force applied to a region around the rivet. The dimple is formed as a rib convexed inwardly or outwardly of the container from the plane of the lid panel and extending across the boundary line between the region near the rivet and the other portion of the lid panel.

Abstract: Disclosed are easy open containers using pull tabs having rivet holes with not less than eight, nor more than ten sides. A point between any two flats of the rivet hole is aligned with the pull tab nose. The disclosed rivet holes provide good locking characteristics.

Abstract: There is provided a tin lid for flat cans rounded oblong, in Hansa format, which includes in its lid image section, a tear-open portion defined by a self-contained notch line capable of being broken up at one end of the lid by means of a pull-open ring attached to this end. At the other end, said notch line includes a straight-lined notch line section which extends in chordal-type fashion with respect to the core wall shaped like an arc of a circle and which is arranged perpendicular and symmetrically to the longitudinal lid center line and which is connected with the other portions of the notch line through a polygonal or chordal-type connecting notch line. The distance between the chordal-type notch line section and the core wall, measured along the longitudinal center line of the lid, preferably ranges between 6 and 10 mm.

Abstract: A safe opening container lid having an annular inclined portion 4 sloping obliquely downwardly from the bead 3 of the lid surrounding the container lip, and a loop portion 7 bent outwardly from the innermost peripheral edge 5 of the inclined portion and returning back to a position slightly outward of such peripheral edge. A central plate 9 continues from the inner edge of the loop portion across a tear line 8, and a finger tab 10 is fixed to the plate such that its tip 11 is positioned at the tear line.

Abstract: A pull tab rivetted to an opening piece defined by a score provided on the lid of a can containing refreshing drink. The pull tab integrally comprises panel portion having a rivet hole, leg portions on the opposite sides of the panel portion and a ring portion contiguous to the ends of the leg portions and remote from the panel portion. The ring portion includes an inner peripheral fold-up and an outer peripheral fold-up and the leg portions include side edge fold-ups and reinforcing fold-ups contiguous to the extreme edges of the side edge fold-ups.

Abstract: An easy open pull tab system and method is adapted for use with a container of the type having a weakened score line, the severing of which permits access to the container. A fastener is joined to the container end and spaced from the score line, with a pull tab joined to the fastener through an octagonal hole, the tab having a pull ring extending from the fastener in a direction away from the score line. The pull tab includes a nose portion extending adjacent to the score line to permit the desired severing upon pulling of the pull ring in a direction away from the container end. The tab is formed with a continuous peripheral curl extending along two beams forward to the nose portion, and is provided with only two carrier lugs on opposite sides of the pull ring for use in the manufacturing of the tab. The container end is provided with a crimped ridge designed to abut a flat metal strip through which the fastener is connected to the container, to limit axial rotation of the tab about the fastener.

Abstract: A can or similar container usually equipped with a removable top cover includes a thin-foil partition that is detachably mounted over the open top of the can body, the thin-foil partition carrying a peripheral score or cut line and a straight score or cut line defining a semi-circular dispensing opening area, and a finger grip which allows the partition to be detached along the two score lines to provide a semi-circular dispensing opening. The partition is made of a thin film material, and includes a rivet-like hollow bulge integrally formed thereon, which is backed by a reinforcing filler member inside to solidify the hollow bulge. The finger grip is solidly secured to an appropriate position of the partition by means of the reinforced bulge, and pulling it up with a finger causes the semi-circular dispensing opening area of the partition to be detached apart from the can body. The straight-line cut edge left after the removal of the opening area serves as a scraper edge for smoothing the excess on a spoon.

Abstract: A steel can end construction for a special liquid product to be protected against contamination in which a pouring opening is to be formed in the can end by pulling the can end metal area defined by an endless score line with a centrally located aluminum pull tab riveted to the steel can end to completely tear the metal within the score line from the can end. The tearing operation is performed by a person holding the can in one hand and with a finger or thumb engaged with the pull tab, pulling the pull tab upward and forward from the can.

Abstract: An improved easy-opening container wall and method of forming the same are disclosed. The easy-open container wall comprises a line of weakness in the container wall defining a tear portion at least partially removable from the container wall, a tab having a line of weakness severing nose end, a lifting end, and a hingedly mounted attaching panel located intermediate the ends for permitting hinged movement of a majority of the tab relative to the attaching panel along a hinge line to bring the nose end into forceable engagement with the container wall to rupture the line of weakness and bend a segment of the tear portion inwardly upon lifting the lifting end of the tab, and the tab is attached to the tear portion at locations on both sides of the hinge line to maintain alignment of the tab on the container wall and to provide improved resistance to pulling or tearing the tab material from the container wall at its attachment to the container wall before the container wall can be opened.

Abstract: A closure arrangement adaptable for an easy open type container including a score line wherein a crossing position of the score line portion lying on the longitudinal axis of a pulling tab passing through the center of a rivet is a minimum distant point from the center of the rivet. The score line portion extends from the minimum distant point right and left and projects outwardly in the region between a first subsidiary line crossing at right angles to the longitudinal axis at the minimum distant point and a third subsidiary line passing through the center of the rivet and extending in parallel with the first subsidiary line, so as to form a pair of swelling score line sections on both sides of the rivet. In this manner, the initial opening force can be decreased, and an easy opening closure can be made even if the score residual is made thicker than that in a conventional closure.

Abstract: A metallic convenience closure for a cylindrical container comprises a panel, an endless score line formed in the panel and defining a central removable portion and a peripheral fixed portion, means forming a part of the fixed portion for attaching a closure to the end of a container to close the end, a manually graspable pull-tab attached to the removable portion of the panel and having a nose portion movable upon lifting of the tab into position adjacent the score line for severing the score line, and stiffening means on the removable panel extending generally parallel to the direction of pull of the pull-tab such that said stiffening means will resist the tendency of the removable portion to bend transversely of the general pull direction.

Abstract: A pouring spout steel can end construction for liquid human food products in which a steel can end is provided which may be opened easily with an aluminum pull tab riveted to a flat panel portion of the can end. The flat panel portion has a pouring spout opening defined by a score line when panel metal is torn from the can end along the score line. The torn metal does not contaminatingly project into the container during opening and remains connected to the can end.

Abstract: A metallic convenience closure for a cylindrical container comprising a panel with an endless severing line formed in the panel and defining a central removable portion and a peripheral fixed portion. A part of the fixed portion is adapted for attaching a closure to the end of a container to close the end. A manually graspable pull-tab is attached to the removable portion of the panel and has a nose portion movable upon lifting of the tab into position adjacent the score line for severing the score line. The tab includes a first portion riveted to the removable portion of the panel, a second portion extending radially outwardly toward the score line, and a manual graspable portion integral with the second portion and extending radially inwardly.

Abstract: A substantially full opening steel can end for food product cans easily opened by an aluminum pull tab riveted to a removable panel portion defined by a score line in a recessed end wall of the can end located close to a seam between the can end and can body. The panel portion has a protective triple fold formation along its peripheral edge when removed, and the score line is located in the top layer of the triple fold formation beneath an overlying stepped tip of the pull tab which ruptures the score line during opening of the can. The score line preferably extends 300.degree., 150.degree. in each direction from the stepped pull tab tip, around the can end to retain the opened panel portion and pull tab on the can when opened.

Abstract: A pull tab for an easy opening can for tearing a pull panel to separate the panel from the can end. The tab is attached to the pull panel by an integral strap which is spirally wound to encircle the anterior portion. The spiral feature provides high shearing stress at the initiation of panel opening and then a flexible connection with the removable panel during continued opening to panel removal.

Abstract: A method of making a retained tab for a container end and a design for same are disclosed. The tab opens in such a way that multiple forms of stress are induced in the tab before the tab will break away from the end. Specifically, the tab endures first a bending stress and then a torsional stress. The mode of stress being defined by the construction of the tab.

Abstract: An easy open can cap has an elongated tear strip defined by a main score and a ring pull tab attached to the tear strip by a rivet. A bending score is provided on the tear strip near the rivet, the bending score extending perpendicular to a longitudinal extending center line of the tear strip so that when the ring pull tab is initially lifted, the tear strip bends at the bending score to thereby reduce the applied force necessary for initiating opening of the tear strip. The main score has a starting end portion extending partially around the area of said rivet and a terminating end portion at the opposite end of the tear strip, the main score having a transitional portion between the starting end portion and the terminating end portion with the transitional portion having a thinner score residual than that of the starting end portion.

Abstract: This invention relates to an end unit of the easy opening type particularly adapted for use in a vacuum packed container. The end panel of the end unit is provided with doming which permits the associated tab to be slightly lifted before a rupturing force is applied with the tab. The particular shape of the dome provides for the necessary doming without an undue stressing of the already scored end panel.

Abstract: This invention concerns a conical can end wherein the central panel of the end is drawn to form a conical frustum with a ring-shaped aperture at its apex end. A recessed panel closes this aperture. A scoreline in this aperture panel defines a gate therein and an opening tab is connected to the gate and placed in the aperture. The tab is pulled or lifted to rupture the score line to open the can end. The tab may be used to remove the gate from the panel or push the gate inwardly with the gate being hinged to the aperture panel.

Abstract: A non-detachable fracture resistant lever tab for easy open containers. The tab is provided with a tongue with a high degree of bendability, the tip of which is staked to the central panel wall by means of a rivet. Bendability of the tongue is enhanced through the use of cooperative transitional planes of graduated coining which urge the bend line to form in an area of maximum coining. A method for manufacture of the tab is disclosed.

Abstract: A non-detachable lever tab for easy open container ends with a tongue, the tip of which is staked to the central panel wall by means of an integral rivet. The lancing which forms the tongue terminates in a pair of nail piercings, which afford a high resistance to tear through. The tongue of the lever tab is coined to substantially increase its resistance to fracture under repeated bending.

Abstract: This application is concerned with a can end comprising an end plate and a tab, the tab and end plate being so adapted to one another that by bending of the tab up by one desiring to open the can, the tab forces a section of the can to pivot inward, thus allowing access to the contents of the can without detaching any piece of the end or tab. The can end is made of aluminum, and the tab is made of steel coated with a material so chosen as to minimize or eliminate corrosion of the steel. In a preferred embodiment, the steel tab is coated with zinc.

Abstract: A tamper-resistant container containing a pharmaceutical preparation, wherein the container is a removable full-panel easy-open metal top end closure having an opening tab for irreversibly removing said end closure, whereby once the end closure is opened, that fact will be readily ascertainable from the appearance of the container.