US3674590A - Means and method for applying facing strips to cores - Google Patents

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Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
  • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
  • B32B21/08—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • 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
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • 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
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
  • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • 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
  • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
  • B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
  • B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
  • B29C63/044—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like continuously
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B27/00—Layered products comprising a layer of synthetic resin
  • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B32—LAYERED PRODUCTS
  • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
  • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
  • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
  • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
  • B32B37/22—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of both discrete and continuous layers
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
  • Y10T156/1056—Perforating lamina
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
  • Y10T156/1062—Prior to assembly
  • Y10T156/1064—Partial cutting [e.g., grooving or incising]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/10—Methods of surface bonding and/or assembly therefor
  • Y10T156/1089—Methods of surface bonding and/or assembly therefor of discrete laminae to single face of additional lamina
  • Y10T156/1092—All laminae planar and face to face
  • Y10T156/1097—Lamina is running length web
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
  • Y10T156/1317—Means feeding plural workpieces to be joined
  • Y10T156/1343—Cutting indefinite length web after assembly with discrete article
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
  • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
  • Y10T156/1702—For plural parts or plural areas of single part
  • Y10T156/1712—Indefinite or running length work
  • Y10T156/1734—Means bringing articles into association with web

Definitions

• the method involves 1) drawing the strip from a supply roll to overlie the top face of a plurality of cores for adhesion thereto while advancing end to end in a procession, (2) forming lines of future rupture across the strip, while advancing toward the cores, at points which are coincident with the trailing ends thereof, and (3) thereafter tensioning the advancing strip, as each core nears the end of its movement through a fixed path therefor, at points on opposite sides of each line of rupture, transversely of the strip to produce thereat a clean severance thereof whereby to free each core, in turn, for removal from those to the rear thereof.
• This invention is concerned with a repetitively-performed two-step operation on a moving film or strip.
• the first step takes place before the strip has reached a line of cores moving through a fixed horizontal path, and the second after the strip has been adhesively applied to a first core and others to the rear thereof.
• the first step is the production of a future rupture line transversely of the strip at a point coincident with the trailing end of each core, and the second is the severance of the strip by applying a pulling force thereto when nearing the end of its movement through the fixed path of travel of the cores.
• a third unit is a tensioning means for producing a sudden acceleration in the movement of the interconnected cores, each such acceleration acting to tension and sever the strip at its line of rupture which is then proximate to each leading core.
• the production of rupture lines across the strip, where severance thereof is to take place at points coinciding with the trailing end of each core is a primary feature of this invention which involves (1) a special speed relationship between the several means comprised in the conveyor system, and (2) a trigger in continuous engagement with the under faces of the cores while advancing through a gap between the loading and feeding means, the trigger also acting to engage with each passing trailing end of a core whereby to complete an electrical circuit to operate means which produce rupture lines across the strip at points coinciding with each such core trailing end, preliminary to a subsequent severance of the strip along each such rupture line in response to operation of the delivery means.
• FIG. 1 is a schematic view of an arrangement and interconnection of operating units which are adapted for ice effective use in the performance of the various operations involved, these units being mounted upon an elongated framework (not shown) much of which, intermediately of its ends, together with certain mechanisms carried thereon, is broken away and omitted from the view as foreign to this invention;
• FIG. 2 is a plan view of the foremost advancing core as it appears when it is first separated from the procession of interconnected cores to the rear thereof;
• FIG. 3 is an enlarged schematic fragmentary end view of the cutting rollers in their operative positions at opposite faces of the strip;
• FIG. 4 is an enlarged schematic fragmentary side view of a core in lagging position as it appears when first advancing through the space between the loading and feeder belts, with portions of other cores shown as stacked thereon on the loading belt to await their turn to drop down, one at a time, into the movement path of the feeder belt whereon each of the cores is, in turn, processionally advanced;
• FIG. 5 which is a view similar to FIG. 4 shows the advancing core of that figure as it appears a moment later as it is catching up with the core immediately ahead to engage therewith;
• FIG. 6 is a diagram of a simple electrical system between the various operating and controlling units which act upon the continuously advancing cores and strip to (1) to unite one to the other and later (2.) to separate one core, together with the strip facing applied thereto, from the remaining cores advancing through their movement path;
• FIG. 7 is a transverse sectional view, taken on line 77 of FIG. 1, showing a core with a strip applied thereto before start of any wrapping of the strip around the core;
• FIG. 8 is an elevational view of one end of the core with the strip facing applied thereto as it appears when wrapped around the core edges, with edges of the strip applied to the rear face of the core, all ready for fabrication into any one of various products for which the cores are suited.
• the work herein described comprises a facing strip or film S which may be produced from various materials, such as a vinyl derivative, having a uniform thickness, usually ranging from 2 mm. up. It is tough, flexible and available in various widths up to several feet. When coated on one face with a suitable adhesive, contact, or otherwise, it is conditioned to serve as an excellent and permanent facing for any base to which it may be affixed.
• the base herein referred to generally as a core C is obtainable in various lengths and cross-sections.
• the cores, all alike, are specifically designated as ai depending upon their positions as shown in FIGS. 1, 4 and 5. These cores which are relatively cheap and a desirable product, are usually raw and unfinished, and often produced from plywood or particle wood, sometimes called chipboard.
• a horizontal movement path for the work is provided, as is also means for continuously advancing the work therethrough.
• This usually takes the form of a framework mounting a conveyor system comprising a loading means X, and a feeder means Y, the latter comprising an end less chain movable around spaced sprocket wheels 11 and 12 one of which, through an endless belt 14 is power driven by a motor 15.
• the links of this chain are equipped with upstanding friction pads 16 for fixed support thereon of the cores when rested upon the top run of the belt.
• Each core starts from the loading means X shown as an endless belt, then advances on to the feeder belt Y, and ends upon a set of traction rollers constituting the delivery means Z, all three being arranged in tandem with small gaps therebetween.
• the loading means X is here shown as an endless belt synchronously driven with the feeder chain, as by an endless chain 13 which travels around sprockets 17 and 18 of unequal diameter (FIG. 1), one mounted coaxially fast with the sprocket wheel 11 and the other similarly mounted with the slightly larger wheel 17 whereby the loading belt X is caused to operate at a slightly faster speed.
• the delivery means traction rollers of the delivery unit Z are driven separately and intermittently at a higher speed.
• the upper runs of the two belts are disposed in a single plane which is also tangential to the tops of the traction rollers 40-43 to operate in the same direction so that the work advancing on one unit may be readily transferred to the next unit for continued movement through the prescribed path of movement.
• a plurality of elongated cores arranged end to end are continuously advanced by the conveyor units.
• the foremost core a when rested upon the delivery unit Z, is separated from the next succeeding core b.
• an upwardly movable roller 20 continues to engage in turn, with the under face of each advancing core.
• This continuous engagement also includes the transverse gap 21 of brief duration which is created between the ends of adjacent cores then advancing between the loading and feeder belts.
• the slow start of each core, as it leaves the loading belt, is followed by a quick catch-up with the core immediately ahead of it as the loading belt acts to transmit an accelerated speed thereto whereby it is enabled to join the core procession then advancing on the feeder belt.
• the roller 20 also is free to rise and partly enter into the gap 21 which intervenes briefly between the lagging core and the one ahead of it (FIG. 4).
• This roller is carried at the top end of an upwardly-biased stem 22 upstanding from a normallyopen micro-switch 23.
• the roller while rising to its upper position, tends to engage the trailing end of the core 3.
• This range of movement for the roller suffices for the micro-switch to momentarily close the electrical circuit wherein it is installed, whereby to trigger operation of the various mechanisms controlled thereby.
• repetitive operation of the trigger is responsive to passing of the trailing end of each core which thereby sets in motion certain mechanism which acts instantly upon the strip S then advancing toward the moving cores for permanent afiixation to the top faces thereof.
• the method herein described involves also a consideration of the other component of the work, viz., the strip of film S and its coordinated movements with those of the cores.
• an adhesive is applied, as by spraying, and then dried, thereby conditioning it for adhesive aflixation to the cores.
• the strip Before its application to any core, however, the strip is operated upon to form crosswise thereof a rupture line along which the strip may be subsequently severed.
• This rupture line may be a row of perforations or slits extending crosswise of the strip at a point Opposite the trailing end of the core to whose face the facing will thereafter be applied. Since the lengths of the cores so to be faced may vary considerably, the location of each such rupture line presents a problem which is dependably solved herein by the method of this invention.
• the means for so perforating or slitting the strip comprises a pair of interconnected rollers 28 and 29 (FIG. 3) having eccentric trunnions 30 and 31 at opposite ends to be mounted within suitable bearings therefor.
• the roller 28 mounts endwise thereof a blade 33 having, by preference, a scalloped cutting edge which at one point in the roller cycle lies radially opposite of a cushioned backing bar 34 extending lengthwise of the other roller 29.
• the backing bar 34 assures a clean cut whatever be its form and depth.
• the cut desirably extends for the full distance between opposite faces of the strip, but not necessarily so.
• the webs of material remaining intact between the cuts should always be adequate to safeguard the strip against parting until its application to a plurality of cores and its movement therewith has been completed through the fixed travel path provided therefor.
• the strip proceeds on toward the rearward end of the feeder belt Y where a succession of cores is being steadily advanced into fixed positions thereon.
• the strip passes around an idling roller 36 to assume a nearly horizontal position before contact is made with any core C then advancing with the feeder belt.
• This point of contact is fixed by a near-by idler roller 37 beneath which the strip is required to pass.
• This last roller may be spring-biased downwardly or gravity-impelled when engaging the strip to assure its firm and smooth adhesion to the top face of each core.
• Other idling rollers may be similarly positioned at various points lengthwise of the advancing cores.
• rollers 38 fixedly positioned below the top run of the feeder chain are provided to supply any needed support therefor. All the cores then advancing on the feeder chain, it will be noted, are interconnected by the strip S to hold them closely together independent of any other means for this purpose.
• the roller 37 establishes a fixed junction point for the advancing strip and cores. It should be equidistant, travelwise, from (1) the cutting blade 33, when engaged with the strip, and (2) and roller when engaged with the trailing end of each core. Since movements of the strip and cores proceed at equal speeds, and operation of the triggered blade is practically an instantaneous one, it follows that each slitted line 26 will be coincidental with the trailing end of a core, regardless of its length. This step and those remaining proceed so rapidly that travel of the strip and cores may be safely maintained at or about 150 feet per minute. This fixed relationship between the three points just noted-the junction, slitting and triggeringis essential to subsequent severing of the strip coincidentally with trailing ends of the cores.
• any desired wrapping of the strip around the cores may be performed.
• the width of the strip should be chosen with due regard to that of the cores and the extent of the strip wrap ing desired.
• FIG. 7 shows a normal relationship in the widths involved, the strip width exceeding that of the cores to provide initially co-planar extensions laterally thereof to be available for later bending around opposite edges of the core and slightly thereunder, as shown in FIG. 8.
• the means for so wrapping the cores may comprise rollers mounted on the apparatus framework at various points along opposite edges of the travel path of the work (omitted from FIG. 1) to engage the lateral extensions of the strip for guiding and bending it downwardly, inwardly and possibly otherwise.
• Operations of the delivery means proceed intermittently, as accelerations thereof occur with movements of each core trailing end through the space between the feeder belt and the traction rollers comprised in the delivery means.
• a control system therefor is also coordinated with operations of the cutting roller 28 and of the feeder belt Y. This part of the present invention will now be described.
• a set of co-level traction rollers 40-43 is mounted to underlie a plane which is tangent to the under faces of the cores when advancing through their movement path.
• Each of these rollers is desirably sleeved within a tubular cover of effective rubber-like friction material, such as neoprene.
• the surfaces of these rollers are endowed with frictional properties sufficient to transmit to the cores a quick pull when resting on the delivery means.
• the foremost core a thereon is moved at an enhanced speed to exert a tension force rearwardly thereof sufiicient to sever the strip S along its slitted or rupture line 26.
• the traction rollers 40-43 are driven by an endless chain or belt 45 passing over a pulley 51 on an over-running clutch 52 which, in turn, is belt-connected at 53 to a pulley 54 on a ll-revolution clutch 55 over which is passed an endless belt 56 which is driven from a pulley 57 coaxially fast with the sprocket wheel 12. Since the sprocket wheel drives the feeder belt Y in constant steady motion, power is supplied therefrom to both the l-re volution clutches 55 and to the over-running clutch 52 for operation thereof in the special way for which they are designed.
• a further endless belt connection 58 extends from the pulley 57 to a pulley 59 on a l-revolution clutch 60, and through a further endless belt 61, extending therefrom to a pulley coaxially of one of the eccentric trunnions 30, the cutting roller 28 is intermittently driven through a single revolution.
• a gear drive between the two eccentric rollers 30 and 31 serves to drive both rollers oppositely and in unison.
• FIG. 6 The wiring diagram of FIG. 6 is well suited for use with this invention. It shows a current source 66 with a main wire 67 extending therefor to join with a connection 68 to one side of the micro-switch 23 and with a further wire 69 leading to one side of the l-revolution clutch 60 for operation thereof.
• a unit commonly called to l-revolution clutch, includes a shaft driven by a motor having adjustable means by which to pre-set its operation for a limited number of turns, one revolution being a common setting and being suitable for operation here although not essential.
• a second wire 70 connected with the other side of the l-revolution clutch switch extends therefrom to join with a second main wire 71 leading back to the current source.
• the second l-revolution clutch 54 to which the main wires 67 and 71 are connected for operation thereof.
• a mechanical timer in the form of a micro-switch 72 is also interposed in this last circuit. Operation of this timer is controlled by the axially-movable plunger of a solenoid 73 in connection at opposite sides thereof with wires 74 and 75, which are joined respectively wtih the wire 69 leading from the micro-switch 23 and the main wire 71 leading to the current source.
• the microswitch 23 controls everything.
• the method of adhesively applying a flexible facing strip of indefinite length to one face of a succession of like cores interengaged end to end for continuous processional advance through a fixed path wherein they are releasably held in fixed positions which comprises the steps of (1) positioning a trigger means for engagement with a second face of each core moving processionally through its fixed path, the trigger means being sensitive to operation in response to movement of each passing trailing end of the core, (2) slitting the strip transversely and concurrently with each operation of the trigger means, while the strip continues its advance toward the core path of movement for application to one face of each core, thereby to interconnect a plurality of the cores then processionally advancing, and (3) applying to the foremost core, when near the end of its movement path, a brief pulling force sufficient to sever the strip connection with the next adjacent core along the slitted line therebetween, the foremost core being then free, with facing strip attached thereto, for separation from those still interconnected and remaining in the core movement path rearwardly thereof.
• Means for adhesively applying a flexible facing of indefinite length to one face of a succession of like cores interengaged end to end for continuous processional advance through a fixed path comprising a continuously moving feeder means whereon each core may be releasably held in a fixed position, while advancing through the said path, means for continuously feeding the facing strip to a point of junction with one face of a foremost core and each core following thereafter, while advancing through the fixed path therefor, means operable repetitively to transversely slit the strip, while advancing to its point of junction with the advancing cores, along lines coincident with the trailing ends of the passing cores, trigger means biased to engage a second face of each core and, with passing movement of each core trailing end, to initiate concurrent operation of the slitting means, and means for thereafter applying a pulling force to the foremost core sufiicient to cause severance of the strip along its slitted line, the foremost core being then free, with facing attached thereto, for separation from those still interconnected and remaining in
• Means for applying an advancing strip to a succession of moving cores wherein means is provided to cause (1) a temporary lag in the initial movement of each core when newly added to the tail end of the procession, followed by (2) a speed-up in each core movement to close the gap resulting from each lag, and wherein the trigger means is movable to a position within the gap, While still open, whereby to engage with the trailing end of the proximate core end, and wherein the trailing end of the proximate core is located equidistantly, tra velwise, from the point of engagement between the slitted line on the strip and the point of engagement between the trigger means and core, whereby to assure coincidental operations thereof.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Life Sciences & Earth Sciences (AREA)
• Wood Science & Technology (AREA)
• Replacement Of Web Rolls (AREA)

Abstract

Description

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Cited By (16)

• 1970
  • 1970-08-31 US US68380A patent/US3674590A/en not_active Expired - Lifetime

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