US3407565A - Roll wrapper - Google Patents

Description

Oct. 29, 1968 R. s. BENDER ETAL' 3,407,565

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United States Patent 3,til7,565 RGLL WRAPPER Ray S. Eentler, David E. Lamon, Henry Pauli, In, and

Edward Fred Plach, Applieton, Wis, assignors to Appleton l iachine Company Fitted Aug. 31, 1965, Ser. No. 484,021 6 Claims. (Cl. 53--2'.l4)

ABSTRACT OF THE DESQLUSURE Apparatus for wrapping a cylindrical roll and for tucking and crimping the wrapper against the ends of the roll including an assembly disposed on either side of the roll operable to center the roll relative to said assembly, to properly position banders relative to the roll for applying reinforcing banding to the roll overlapping the ends thereof, and to tuck and crimp the wrapper and overlying banding against the end of the roll.

This invention relates to packaging and more particularly to devices for supplying protective wrapping material to large bodies and for tucking and crimping the wrapping around the bodies.

Many products are manufactured in continuous sheets or webs. These materials, paper for example, are easily formed into large cylindrical bodies. These rolls of material are not only conveniently shaped for storage and shipment, but also provide a ready means of feeding the material for use. Since the investment in each roll of material can be quite substantial, the importance of protecting these rolls from damage prior to utilization cannot be overemphasized. It can be readily seen, for example, that even a small gouge in the surface of a roll of paper can render a substantial portion of the material unfit for use. Similarly, any injury to the rim or edging of such a roll can easily render it unusable since the resulting indentations may severely limit the capability of the mate rial to unwind from the roll.

The desired protection may be provided by suitably encasing the body in an appropriate covering or wrapping. Rolls of the type under consideration typically range in size from two to eight feet in length and have diameters that range from one to six feet. It is readily seen that handling such cumbersome rolls can become quite difiicult.

An existing procedure for applying protective coverings to these large rolls includes the following sequence of steps: (1) Manual selection of a wrapper or waterproof paper covering; (2) manual alignment and orientation of the roll with the wrapper, e.g., by rolling the roll onto the wrapper spread out on a flat surface, so that a portion of the wrapper overlaps the ends of the roll; (3) securing the leading edge of the wrapper to the roll; (4) pushing the roll forward until it is enveloped by the wrapper; (5) manual application of reinforcing banding to the wrapped roll with a portion extending over the end of the roll; (6) tucking and crimping the overlapping portions of the wrapper and reinforcing banding over the ends of the roll; and (7) gluing of a header or cover piece to each end of the roll.

It becomes apparent, considering the size of the rolls, that it can be a quite expensive, time-consuming and laborious task just to accurately measure the large pieces of wrapping material required and to accurately position and center the roll with respect to the wrapper. In fact, just moving the immense roll itself is rather strenuous. The difficulties of the job do not end with application of a wrapper since it is also important to accurately position the reinforcing banding on the surface of the roll.

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Furthermore, tucking and crimping: the banding and wrapper against the end of the roll are also difficult tasks which, if not properly performed, produce an inaccurately positioned, loosely tucked and inconsistently crimped wrapping and, therefore, a poorly protected roll.

In accordance with the present invention, there is provided an apparatus which is capable of operating automatically to wrap securely a roll of paper or similar material with a wrapper and a reinforcing banding. Such an apparatus is also capable of uniformly, quickly and consistently tucking and crimping the portions of the banding and wrapper overlapping the ends of the roll being wrapped. This device also eliminates many of the material handling problems usually associated with large rolls of material and provides for automatic selection of the wrapper to be used.

Use of the present invention can (1) reduce the number of operating personnel, (2) increase their productivity, and (3) eliminate most, if not all, of the manual steps previously necessary to accomplish wrapping and reinforcing of these large size rolls. Thus, the speed and efiiciency of an entire assembly line may be increased by use of the present invention due to the time savings resulting from the automatic handling of the roll. Furthermore, once the wrapper is actually applied to the roll, and any reinforcing banding also incorporated, the automatic tucking and crimping of overlapping portions of the wrapping and banding can be accomplished neatly, rapidly, efficiently, effectively and uniformly.

More specifically, an apparatus incorporating the features of the present invention is capable of receiving rolls which vary over wide ranges of size including, but not limited to, rolls having one to six foot diameters and varying in length from about two to about eight feet. A receiving section of the apparatus transversely positions the roll relative thereto. The roll is then ejected from the receiving section into position on a pair of drums for wrapping, tucking and crimping. The roll is rotated by the drums and a pair of tucking and crimping assemblies are properly positioned relative to the ends of the roll. The position of these assemblies controls the operation of a wrapper supply mechanism to select a wrapper of proper size such as will overlap each end of the roll. The wrapper supply mechanism feeds: the wrapper to the surface of the roll to which it is attached, and the roll is rotated to cause the wrapper to envellop it.

A bander connected to the tucking and crimping assembly is positioned adjacent the surface of the roll to supply reinforcing banding externally to the wrapper. The primary purpose of this banding is to provide additional protection to the more easily damaged areas of the roll, such as the edges of the roll.

Each tucking and crimping assembly includes a first member which operates to tuck the overlapping portions of the Wrapper and banding against the end of the roll and a second member to periodically and uniformly crimp the tucked wrapper and banding portions. Upon completion of the wrapping, tucking and crimping operations, the assemblies are withdrawn from the roll and the roll is discharged to allow for any additional operation desired, such as application of end headers or taggmg. 7 Thus, it is seen that by the present device there is provided an apparatus which is capable of simply and automatically supplying wrapping material to a roll of substantial size. In addition, the apparatus of the present invention is capable of automatically supplying a reinforcing banding and of tucking and crimping the portions of wrapper and banding overlapping the ends of the roll in order to protect the edges of the Wrapped roll.

Numerous other advantages and features of the present invention will become readily apparent from the following detailed description of the invention and of one embodiment thereof, from the claims and from the accompanying drawings in which each and every detail shown is fully and completely disclosed as a part of this specification, in which like reference numerals refer to like parts, and in which:

FIGURE 1 is a diagrammatic view of an entire roll wrapping, tucking and crimping apparatus embodying the features of the present invention shown in combination with a Wrapper supply and feed mechanism suitable for use with the roll wrapper;

FIGURE 2 is a plan view of the roll wrapper apparatus of FIGURE 1;

FIGURE 3 is a side elevational view, partially in section taken along the line 3-3 of FIGURE 2;

FIGURE 4 is another side elevational view partially in section, taken along the lines 44 of FIGURE 2;

FIGURE 5 is a front elevational view partially broken away, taken along the lines 55 of FIGURE 2;

FIGURE 6 is a plan view of a bander apparatus utilized with the roll wrapper of the present invention;

FIGURE 7 is a front view of the bander;

FIGURE 8 is a side view, partially out way of the bander; and

FIGURE 9 is a partial side view of the bander taken from the opposite side to that of FIGURE 8.

The overall roll wrapping apparatus is shown with its respective elements in operative relation in FIGURE 1. A cylindrical roll of paper 22 to be wrapped is shown in dotted lines at 22 positioned in the receiving section 24 of the roll Wrapper 20. The receiving section 24 includes a plurality of free running rollers 26 located just below fioor level that are designed to receive and allow transverse positioning of the roll 22. The rollers 26 are divided into two sets 28, the rollers in both sets canted towards each other to form a trough 30 to receive the roll 22. The rollers 26, as clearly shown in FIGURE 3, are each freely supported in a roller rack 32 mounted on a centering table 34. One side of the table 34 is affixed to an arm 36 pivotally attached to the frame of the roll wrapper 20. The opposite side of the centering table 34 is supported at its lower corner 40 by an adjustable stop 42. The bottom 44 of the table 34 is connected to the piston 46 of a compressed air ejection cylinder 48 which, when activated, extends the piston 46 causing the table 34 to pivot on the pivot arm 36 to eject the roll into the roll wrapper across cantilevered floor plates 50, 52 which cover the machinery pit adjacent the rollers 26 and also adjacent a pair of roller drums 56, 58.

Adjustable extender plate (FIGURE 4) also span the gap adjacent the power drums 56, 58. These extenders 60 are shown retracted to allow the tucking and crimping assemblies 62 to converge without interference. Positioning of each of the extenders 60 is accomplished by an air cylinder 64 connected to one end of a bell crank 66 i which pivots upon actuation of the cylinder 64 to cause reciprocal movement of the extender plates 60 connected to its other end.

When ejected from the receiving section, the roll moves into the machine 20 until it comes to rest on the spaced honizontal roller drums 56, 58 extending substantially the entire width of the roll wrapping machine 20. As most clearly shown in FIGURE 2, the shaft 68 of driven drum, shown as drum 56, although either or both drums may be driven, is supported at either end by a pair of outer pillow blocks 70 attached to the machine frame. A pair of inner pillow blocks 72 which ride on shaft 68 each pivotally support one side of a generally U-shaped discharge yoke 74, The drum 56 is driven by a motor 76 to which it is coupled through appropriate gearing 78. The ends of the shaft 80 of the other drum 58, in this instance an idler drum, are supported in pillow blocks 82 which are each secured in the other side of a discharge yoke 74.

Referring again to FIGURES 3 and 4, a portion of each yoke 74 is provided with a slot 84 to receive a spacer bar 86 upon which the yoke 74 rests. A linking member 88 extends down from the bottom of each yoke 74 and is connected to a piston rod 90 of a discharge air cylinder 92. When the cylinders 92 are activated, the yoke assemblies 74 are pivoted about the pillow blocks 72 of the driven drum 56 to discharge the roll 22 from the machine 20 across exit floor plates 94. Additional retractable extender plates 96 (FIGURE 4) are connected to a piston rod 98 of an air cylinder 100. When the cylinder 100 is energized, the extender plates 96 are positioned adjacent the exit floor plate 94 to allow long rolls to cross the gap. The plates 96 are retracted to allow inward movement of the tucking and crimping assemblies 62 when narrow rolls are being wrapped.

As may readily be seen from FIGURE 2, the assemblies 62 are equally spaced from a line passing through the center of the apparatus (indicated by section line 3-3). Because of this relationship, it is desirable to transversely center a roll to be wrapped relative to the assemblies 62 before ejecting the roll onto the drums 56, 58.

In the disclosed embodiment of the roll wrapper this centering is accomplished while the roll 22' is in place in the receiving section 24. A roll in place in the trough 30 defined by the two sets of rollers 28 is transversely centered relative to the tucking and crimping assemblies 62 by a pair of centering arms 102 extending out horizontally from and aifixed to the assemblies 62. As the assemblies 62 converge, one of the arms 102 engages one end of the roll 22' displacing it transversely along the rollers 26.

Centering of the roll is completed when both ends of the roll contact the face 103 of each arm 102 and activates a limit switch 104, mounted on each arm 102. When both switches 104 are activated, thereby indicating that the centering of the roll is completed, movement of the assemblies ceases. An air cylinder 105 located in each centering arm 102 is energized to open the arms 102 slightly thereby relieving the pressure of the arms 102 against the roll. The roll 22 may then be freely ejected from the receiving section 24 onto the drums 56, 58 as described above.

The tucking and crimping assemblies are powered by any suitable means which is capable of imparting equal and opposite lateral movement to the assemblies for centering the roll and which is responsive to activation of the centering arm limit switches for fixing the position of the assemblies. In the disclosed embodiment of the roll wrapper, for example, the tucking and crimping assemblies 62 each ride on a plurality of rollers 106 attached to either side of each assembly. The rollers 106, in turn, ride in tracks 108 formed in a pair of guide rails 110 traversing the apparatus.

Each assembly is driven in equal and opposite directions through a pair of racks 112, 114 and 116, 118 suspended, respectively, from either end of each assembly. The racks 112, 116 mesh with opposite sides of an upper pinion 120 keyed to a first drive shaft 122 while racks 114, 118 similarly mesh with another upper pinion 124 keyed to a second drive shaft 126. The first shaft 122 is driven through a lower sprocket 128 keyed thereto and engaged by a chain drive 130 connected to an arm 131 which is part of a carriage and cam follower system supported in a carriage base 134. The carriage 132, coupled to the piston of a compressed air motor 136 (FIGURE 4), moves reciprocally as the motor 136 is energized and deenergized thereby rotating the drive shafts 122, 126 through the carriage and cam follower system 132 and chain drive 130. A chain 138 connects two sprocket wheels 140, 142 keyed to the first and second shafts 122, 126, respectively, to transmit rotational movement of the first shaft 122 to the second shaft 126. An idler wheel 144 positioned between the two drive shafts 122, 126 engages the chain 138 and is provided with a drive tensioner 146 to regulate the tension of the chain. When both centering arm limit switches 104 are activated, the motor 136 is de-energized and brakes 147 are activated to hold the assemblies 62 in place.

Wrapper for the roll is provided by a wrapper feed assembly indicated generally at 148 which is capable of selecting the proper size wrapper for the roll being wrapped. A plurality of limit switches 150, indicated diagrammatically in FIGURE 2, are suspended from one of the assemblies 62. As the assemblies converge, each switch is successively and alternately activated to close an appropriate electrical circuit that controls the selection of the wrapper. Thus, as each switch is activated, a narrower wrapper is selected by a wrapper feeding assembly 148 so a wrapper of proper width is available for wrapping the roll 22.

The wrapper feeding assembly 148 supplies the selected wrapper through a threading mechanism 152 to the surface of the roll 22. Adhesive is applied to the wrapper as it passes through the threading mechanism 152 to attach the wrapper to the roll surface. The rotating roll 22 draws the wrapper around it thereby causing the wrapper to completely envelop the roll. Details of the wrapper supply assembly 148, the threading mechanism 152 and adhesive applying means are not necessary to the understanding of nor are they considered part of the present invention.

When the roll is wrapped, reinforcing banding is applied to the wrapped roll in order to provide additional protection for those areas most apt to be damaged, particularly the edges of the roll. In accordance with the present invention, bander mechanism 154 is positioned relative to each assembly 62 so the banding is added to cover the edges of the roll. The banding has sufiicient width to overlap the end of the roll and still have enough material for attachment to the surface of the roll. In the discosed embodiment, the reinforcing bander mechanism 154 is connected to one side of each crimping and tucking assem bly 62 and is properly positioned relative to the roll by transverse movement of the assemblies when centering the roll.

Referring more particularly to FIGURES 6, 7, 8 and 9, there is shown the bander 154 mounted on a horizontal travel bar 156 for movement to and away from the surface of the roll 22. The reinforcing banding 158 is rotated on a core shaft 160 with the feed 158a passing from underneath the roll of handing up over a drive roller 162 which has a rider roller 164 resting thereon to apply pressure to the banding 158. The leading edge 158a of the banding then passes, as most clearly shown in FIGURE 9, between a first and second pair of guide plates 166, 168, respectively, which direct the handing over the top of a guide roller 170 which may although not necessarily engage the surface of the roll 22 of paper being wrapped. When it is desired to apply the reinforcing banding 158 to the roll 22, the bander assembly 154 is displaced forward along the horizontal bar 156 until the guide roller 170 is adjacent to the surface of the roll 22 to define a gap that will guide the banding 158 along the surface of the roll 22 as it passes over the guide roller 170.

Feeding of the banding 158 is initiated by energizing a motor 172 which causes rotation of the drive roller 162 through appropriate gearing 174 and chain drive 176 connected between the sprocket wheels 177, 178 connected, respectively, to the gearing 174 and drive roller 162. After passing over the feed roller 170 the leading edge 158a travels along the surface of the roll 22 to the nip defined by the roll 22 and the drum 56. The banding 158 is maintained under tension by the frictional forces between the roll 22 and the drums 56, 58 which tend to advance the banding at a speed faster than the rate it is being advanced by the bander 154. The sprocket wheel 178 includes an overspeed clutch which allows the drive roller 162 to freely rotate at this faster speed. A glue gun 182 (FIG- URE 9) mounted on a top 184 of the bander assembly 1.54 applies adhesive to the reinforcing band 158 so that it may be attached to the surface of the roll 22 as the 6 banding 158 passes between the roll 22 and the drums 56, 58.

In order to sever the banding after the proper amount has been supplied to the .roll 22, it is desirable to slacken the banding during the severing operation. This slack in the banding 158 allows the bander 154 to neatly sever the banding with a simple shear stroke.

As shown in FIGURES 7 and 8, the banding is slackened by activating a cylinder 186 connected to a rack 188 engaged with the drive roll 162. The sudden movement of the rack causes a speed increase in the drive roller 162 to which the rack is coupled through a pinion and second over speed clutch 189. The momentary increase in the speed of rotation of the drive roller 162. slackens the banding 158 between the drive roller 162 and the guide rollers 179. Another air cylinder 190 is activated at this time to cause a cutter bar 192 to pass down alongside a serrated cutting edge 194 to sever the slackened banding 158. The signal which activates the cylinder 190 also de-energizes the motor 172 and actuates the glue gun 182 to apply adhesive to the trailing edge of the banding 158 so it can be firmly attached to the surface of the roll 22.

Complete protection of the roll is accomplished by folding or tucking the overlapping portions of the wrapper and banding against the ends of the roll. In accordance with the present invention each of the tucking and crimping assemblies are properly positioned for tucking and crimping during the centering of the roll. While the roll is still rotating over the drums 56, 58, the assembies are energized to tuck and crimp the overlapping wrapper and handing portions against the end of the roll. Thus, when the roll is discharged from the roll wrapper, it is ready for an end cover or header, for tagging and for shipment or storage.

Referring back to FIGURES 2 through 5, there is shown one embodiment for tucking and crimping the wrapper in which each assembly 62 includes an arm 196 pivotally mounted at its center 198 and having a tucking roller 200 mounted at either end. The relationship of the arm 196 to the remainder of assembly 62 is such that initial positioning of the roll 22 by the centering arms 102 attached to the crimping and tucking assemblies 62 positions the arm 196 so that when rotated in a plane normal to the end of the roll 22, it passes immediately adjacent the end of the roll to tuck the overlapping portions of the wrapper and reinforcing banding against the end. Each tucking and crimping assembly 62 is also provided with a crimping plate 202 which is extended out and held stationary against the end of the roll 22 to periodically crimp the excess tucked wrapper as it passes under the leading edge 284 of each crimping plate 202. Because of the uniform rotational speed of both the arm 196 and the roll 22, the tucking arm 196 and crimping plate 202 produce uniform, evenly spaced, neat tucking and crimping.

Thus, there has been disclosed a wrapping, tucking, and crimping apparatus which is capable of automatically providing a wrapper for cylindrical rolls or other bodies varying over wide ranges of size, of applying a reinforcing banding to selected areas of such rolls or bodies and of tucking and crimping the ends of the wrapper against the ends of the bodies or rolls to protect the surfaces and edges thereof.

In operation, a roll to be wrapped. is placed on the receiving section for transverse centering relative to a pair of tucking and crimping assemblies. As these assemblies converge, one of a pair of entering arrns attached to the assemblies contacts the end of the roll and moves it transversely along the receiving roller until centered. The roll is then ejected onto a pair of drums which cause the roll to rotate. A wrapper is supplied and attached to the surface of the roll and envelops it as the roll rotates. Similarly, a bander supplies reinforcing banding to selected areas of the roll. While the roll is still being rotated, the assemblies are energized to tuck and crimp the overlapping portions of the wrapper and banding against the 7 ends of the roll. The assemblies are then Withdrawn and the'roll discharged from the apparatus in condition for any other steps that may be desired.

It will be readily observed from the foregoing detailed description of the invention and in the illustrated embodiment thereof that numerous variations and modifications may be effected without departing from the true spirit and scope of the novel concepts and principles of this invention.

What is claimed is:

1. A machine for tucking and crimping a wrapper on a roll comprising in combination a tucking and crimping assembly, means extending from the assembly and engag' ing one end of the roll upon transverse movement of said assembly for centering the roll relative to said assembly, means for rotating the roll, and means attached to and transversely positioned by said assembly relative to the roll for applying banding to the surface of the roll in end overlapping relation thereto, said assembly including means for tuckingoverlapping portions of the wrapper and banding against the end of the roll, and means located adjacent the end of the roll for crimping the tucked portions.

2. Apparatus for tucking and crimping a wrapper located on a roll in end overlapping relation, said apparatus comprising in combination means for rotating the roll, bander means for applying a reinforcing banding to the roll in end overlapping relationship therewith, means for tucking the overlapping portions of the wrapper and banding against the end of the roll, means for crimping the tucked portions of the banding and wrapper, said bander means including means for advancing the banding, means for guiding the banding along the surface of the roll into contact with said roll rotating means, said roll and said roll rotating means cooperating to define feed means for maintaining tension in said banding, means for slackening the banding, and means for severing the slackened banding.

3. A machine for tucking and crimping a wrapper on a roll comprising in combination a tucking and crimping assembly, means extending from said assembly and engaging one end of the roll upon transverse movement of said assembly for centering the roll relative to said assembly, means for rotating the roll, bander means for supplying banding overlapping the ends of the roll, said bander means being attached to said assembly for transverse positioning of said bander means relative to the roll, said bander means including means for advancing the banding, means cooperating with the surface of the roll for guiding the banding along the surface of the roll and means for severing the banding, said tucking and crimping assembly including means for tucking the overlapping portions of the Wrapper and banding against the end of the roll, and means for crimping the tucked wrapper and banding.

4. A roll wrapping and crimping machine comprising in combination a tucking and crimping assembly, means located adjacent said assembly for receiving a roll to be wrapped, arm means attached to said assembly and engaging the ends of the roll for centering the roll relative to said assembly along said receiving means, means for ejecting the roll from said receiving means, drum means for positioning and rotating the discharged roll, means for supplying a wrapper to the roll in end overlapping relation thereto, means connecting said assembly to bander means for positioning said bander means relative to said roll, said bander means having a roller adjacent the surface of the roll, and means energizing said bander means for applying banding to the roll over said roller in overlapping relation to the end of the roll, said tucking and crimping assembly including means for tucking the overlapping portions of the wrapper and banding against the ends of the roll, and means positioned adjacent said tucking means for crimping the tucked wrapper and handing.

5. An apparatus for wrapping a cylindrical roll comprising in combination a plurality of canted free running rollers arranged in two sets to define a roll receiving recess, a pair of tucking and crimping assemblies, an arm extending from each of said assemblies engaging one end of the roll upon convergence of said assemblies toward each other for transversely centering the roll relative to said assemblies along said rollers, means for tilting said rollers to eject the roll therefrom, a pair of drums disposed beneath said tucking and crimping assemblies for positioning the ejected roll, a motor :for driving at least one of said drums to rotate the roll, means for supplying a Wrapper to the roll in end overlapping relation thereto, a plurality of banders for applying reinforcing banding to the surface of the roll, said bander assemblies each including a guide roller adjacent the surface of the roll, a pair of rollers between which the banding passes, a motor for rotating one of said pair of rollers to initially advance the banding over said guide roller and along the roll, an overspeed clutch associated with said one roller and responsive to increased speed of the banding for disengaging said motor means from said one roller, a rack for rotating said one roller at a rate sufiicient to increase the speed of the banding for slackening the banding between said pair of rollers and said guide roller, and a blade for severing the banding when slackened, each of said tucking and crimping assemblies including an arm pivotally mounted at its center for rotation in a plane perpendicular to the ends of the roll, a rotatable head on each end of said arm for tucking the overlapping portion of the wrapper and banding against the end of the roll, a crimping plate having a cylindrical leading edge and a surface parallel to and adjacent the end of the roll for crimping the tucked wrapper and banding, and means for vertically displacing one of said drums to discharge the roll from said drums.

6. Apparatus for applying a wrapper to a roll comprising in combination a pair of assemblies disposed for transverse reciprocable movement, means for receiving a roll to be wrapped and adapted to allow transverse movement thereof, means attached to each assembly for engaging one end of a roll positioned on said receiving means and for causing transverse movement of said roll until centered with respect to said assemblies, and bander means supported on each said assembly and transversely movable therewith for simultaneous positioning of each said bander means relative to the ends of said roll Whereby reinforcing banding supplied by each said bander means overlaps one end of the roll.

References Cited UNITED STATES PATENTS 2,803,935 8/1957 Gibson 53-380 2,880,560 4/1959 Gibson 53-211 X 2,893,191 7/ 1959 Lancaster 53-214 X 2,904,946 9/1959 Ullstrom et al. 53-380 2,919,527 1/1960 Smith et al 53-216 X 3,033,102 5/1962 Fryklund. 3,290,861 12/1966 Prager 53-214 3,330,095 7/1967 Sandberg 53-380 FOREIGN PATENTS 176,024 7/ 1961 Sweden.

WILLIAM W. DYER, JR., Primary Examiner.

N. ABRAMS, Assistant Examiner.

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