EP1783077A1 - Feed unit for feeding sheets to a packing line - Google Patents
Feed unit for feeding sheets to a packing line Download PDFInfo
- Publication number
- EP1783077A1 EP1783077A1 EP06123491A EP06123491A EP1783077A1 EP 1783077 A1 EP1783077 A1 EP 1783077A1 EP 06123491 A EP06123491 A EP 06123491A EP 06123491 A EP06123491 A EP 06123491A EP 1783077 A1 EP1783077 A1 EP 1783077A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- feed unit
- stack
- withdrawal opening
- hopper
- lateral wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/34—Article-retaining devices controlling the release of the articles to the separators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/0808—Suction grippers
- B65H3/085—Suction grippers separating from the bottom of pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/08—Separating articles from piles using pneumatic force
- B65H3/10—Suction rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/46—Supplementary devices or measures to assist separation or prevent double feed
- B65H3/48—Air blast acting on edges of, or under, articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/423—Depiling; Separating articles from a pile
- B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
- B65H2301/42322—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from bottom of the pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2301/00—Handling processes for sheets or webs
- B65H2301/40—Type of handling process
- B65H2301/42—Piling, depiling, handling piles
- B65H2301/423—Depiling; Separating articles from a pile
- B65H2301/4234—Depiling; Separating articles from a pile assisting separation or preventing double feed
Abstract
Description
- The present invention relates to a feed unit for feeding sheets to a packing line.
- The present invention may be used to advantage for feeding tax stamps to a packing line of an automatic machine for producing packets of cigarettes, to which the following description refers purely by way of example.
- An automatic machine for producing packets of cigarettes normally comprises a station for applying tax stamps, where a tax stamp is applied to the outer surface of each packet of cigarettes in such a position that the tax stamp must be torn for access to the cigarettes inside the packet. The tax stamp application station comprises a feed unit for supplying a succession of tax stamps by withdrawing them from the bottom of a vertical stack housed inside a hopper, or by cutting them off a continuous strip unwound off a reel.
- One example of a feed unit for withdrawing single sheets from the bottom of a stack inside a hopper is described in Patent
US 4918908 A1 , in which a suction pickup roller is rolled along a sheet at a bottom opening of the hopper to roll up the sheet; and, once the sheet is rolled up completely, the pickup roller is stopped in a release position to release the sheet to an input conveyor defined by two pickup rollers parallel and tangent to each other to engage the sheet between them. - Another example of a feed unit for withdrawing single sheets from the bottom of a stack inside a hopper is described in Patent Application
EP 970885 A1 - Other examples of feed units for withdrawing single sheets from the bottom of a stack inside a hopper are described in Patent
US 3881719 A1 , Patent ApplicationGB 1571741 JP 2004075260 A - At the withdrawal opening, a hopper has supporting members for supporting the sheets inside the hopper from underneath and vertically supporting the stack to prevent the sheets from falling out by force of gravity. To extract a sheet from the hopper, a suction pickup head engages the underside surface of the sheet to pull the sheet downwards, so that the sheet curves towards the centre to release the lateral portions of the sheet from the supporting members and so slip through the withdrawal opening of the hopper.
- Tax stamps have been found to have a fairly wide dimensional tolerance (as much as 1 mm over a total size of 20-25 mm), and, since the supporting members must be set to permit withdrawal of the larger stamps (upper tolerance limit), the smaller stamps (lower tolerance limit) are inadequately supported by the supporting members, and are often withdrawn from the hopper together with the stamps underneath. Multiple withdrawal of two or more tax stamps is substantially caused by poor support of the "smaller" stamps, and is further compounded by the slight gluing effect of the ink with which the stamps are printed, and by the thinness of the stamps themselves, the porosity of which permits passage of the suction generated by the suction pickup head.
- It is an object of the present invention to provide a feed unit for feeding sheets to a packing line, which feed unit is designed to eliminate the aforementioned problems, while at the same time being cheap and easy to produce.
- According to the present invention, there is provided a feed unit for feeding sheets to a packing line, as claimed in the accompanying Claims.
- A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
- Figure 1 shows a schematic view in perspective of a feed unit for feeding sheets to a packing line, in accordance with the present invention;
- Figure 2 shows a schematic side view, with parts removed for clarity, of a hopper of the feed unit;
- Figure 3 shows a schematic section, with parts removed for clarity, along line III-III of the Figure 2 hopper;
- Figure 4 shows a schematic section, with parts removed for clarity, along line IV-IV of the Figure 2 hopper;
- Figure 5 shows a schematic plan view, with parts removed for clarity, of the Figure 2 hopper;
- Figure 6 shows a view in perspective of a detail of the Figure 2 hopper.
-
Number 1 in Figure 1 indicates as a whole a feed unit forfeeding tax stamps 2 to a packing line (not shown) of an automatic machine for producing packets of cigarettes. More specifically,feed unit 1feeds tax stamps 2 to a tax stamp application station located along the packing line, and which applies a tax stamp to the outer surface of each packet of cigarettes, in such a position that the tax stamp must be torn for access to the cigarettes inside the packet. -
Feed unit 1 comprises avertical hopper 3, which houses astack 4 oftax stamps 2 extending in a vertical feed direction D1, and has a bottom withdrawal opening 5. Apickup device 6 is located at withdrawal opening 5 ofhopper 3, and engages withdrawal opening 5, in use, to withdrawindividual tax stamps 2 successively fromstack 4 and feedtax stamps 2 to the packing line.Hopper 3 comprises four fixed L-shaped sections 7 located at the four corners ofstack 4 to laterally retainstack 4. -
Pickup device 6 comprises awheel 8 rotating about a central axis 9; and at least onesuction pickup head 10 fitted towheel 8 to move cyclically along an endless path through a loading station, wherepickup head 10 engages withdrawal opening 5 ofhopper 3 to withdraw atax stamp 2, and through a follow-up unloading station, where pickup head 10feeds tax stamp 2 to the packing line. - In an alternative embodiment not shown,
pickup head 10 is fitted towheel 8 to rotate about an axis, parallel to central axis 9 ofwheel 8, under the control of a cam actuating system (as described, for example, in Patent ApplicationEP 970885 A1 pickup device 6 may be designed differently, e.g. as described in PatentUS 4918908 A1 . - As shown in Figures 2-5, five fixed supporting
members 11 are located at withdrawal opening 5 ofhopper 3, and each have one end extending inside withdrawal opening 5, perpendicularly to feed direction D1, to reduce the passage section of withdrawal opening 5 and retaintax stamps 2 instack 4 insidehopper 3. As shown more clearly in Figure 5, two supportingmembers 11 are arranged uniformly along a majorlateral wall 12 ofstack 4, and three supportingmembers 11 are located along a majorlateral wall 13 ofstack 4 parallel to and opposite majorlateral wall 12. - Each supporting
member 11 is defined by a screw screwed through a threaded throughhole 14 formed through aframe 15 fitted to fixedsections 7 ofhopper 3; tightening or loosening each supportingmember 11 with respect toframe 15 provides for adjusting the position of supportingmember 11 with respect to withdrawal opening 5. It should be pointed out that the position of supportingmembers 11 with respect to withdrawal opening 5 is adjusted to adapt the size of withdrawal opening 5 to the size oftax stamps 2, and can only be done during maintenance/setup, after stoppingfeed unit 1. - Another supporting member 16 (shown in perspective in Figure 6) is located at withdrawal opening 5 to reduce the passage section of withdrawal opening 5 to retain
tax stamps 2 instack 4 insidehopper 3, and is mounted to move in an adjustment direction D2 perpendicular to feed direction D1. As shown more clearly in Figure 5, supportingmember 16 is located at majorlateral wall 12 ofstack 4, between the two supportingmembers 11, and is connected to an adjustingmember 17 for adjusting, in use, the position of supportingmember 16 in adjustment direction D2 as a function of the size, measured in adjustment direction D2, oftax stamps 2 close to withdrawal opening 5. - In the preferred embodiment shown in the attached drawings, adjusting
member 17 is elastic, and pushes supportingmember 16 elastically with a given force towardsstack 4 in adjustment direction D2. Elastic adjustingmember 17, by means of supportingmember 16, also pushes in adjustment direction D2 thetax stamps 2 located close to withdrawal opening 5, so that the supportingmembers 11 at majorlateral wall 13 ofstack 4 act as a stop member fortax stamps 2, in opposition to the thrust exerted by adjustingmember 17 by means of supportingmember 16. - In an alternative embodiment not shown, adjusting
member 17 comprises a motor (normally electric) to move supportingmember 16 in adjustment direction D2; in which case, the motor may be controlled by a sensor for determining the actual size and/or arrangement of thetax stamps 2 located close to withdrawal opening 5. - The preferred embodiment shown in the drawings comprises a deformable
elastic body 18, which is made of elastic spring steel and comprises aportion 19 defining supportingmember 16, and an L-shaped portion 20 defining elastic adjustingmember 17.Portion 19 ofelastic body 18 is horizontal, i.e. perpendicular to feed direction D1, and forms withportion 20 an obtuse angle of over 90° and normally ranging between 95° and 110°. -
Portion 20 ofelastic body 18 is fixed rigidly in an adjustable position to fixedframe 15; for which purpose,portion 20 ofelastic body 18 has anelongated slot 21, which is engaged by ascrew 22 screwed into a threaded hole formed throughframe 15. - The
tax stamps 2 close to withdrawal opening 5 are separated by a pair ofnozzles 23, each of which is connected to a compressed-air source 24 and located close to withdrawal opening 5 to blow a jet of compressed air ontostack 4 in a blow direction D3 parallel totax stamps 2 and perpendicular to adjustment direction D2. As shown more clearly in Figure 5, bothnozzles 23 face a minorlateral wall 25 ofstack 4 perpendicular to majorlateral walls lateral wall 25 ofstack 4, and adjustment direction D2 is perpendicular to majorlateral walls 12 and13of stack 4. - Additional fixed supporting members 26 (shown by dash lines in Figure 5) may also be provided at minor
lateral wall 25 ofstack 4 and at a minorlateral wall 27 ofstack 4 parallel to and opposite minorlateral wall 25 ofstack 4. - In an alternative embodiment not shown, the
retaining sections 7 ofhopper 3, as opposed to being vertical, may slope with respect to the vertical, or be horizontal (i.e. feed direction D1 may not be vertical); in which latter case,feed unit 1 must comprise a push device foreasing stack 4 towards withdrawal opening 5 (in thehopper 3 shown, this is done by force of gravity, which tends to pulltax stamps 2 instack 4 downwards). - In actual use,
suction pickup head 10 engages and exerts force on atax stamp 2 to extract it from withdrawal opening 5 of the hopper through the passage defined by supportingmembers tax stamp 2,tax stamp 2 is necessarily deformed elastically to extract it fromhopper 3. Any variation, due to manufacturing tolerances, in the size oftax stamps 2 in adjustment direction D2 is compensated by instantaneous, automatic adjustment to the position of supportingmember 16, thus ensuring adequate support of the smaller tax stamps 2 (lower tolerance limit) to prevent multiple withdrawal, while at the same time avoiding excessive support of thelarger tax stamps 2, which would thus be difficult or impossible to withdraw. - Feed
unit 1 as described above may be used to supply any kind of sheet, e.g. blanks for producing rigid packages, sheets of packing material for producing soft packages, or labels or stamps applied inside or outside a package.
Claims (19)
- A feed unit for feeding sheets to a packing line; the feed unit (1) comprising:a hopper (3) having a withdrawal opening (5) and housing a stack (4) of sheets (2) extending in a feed direction (D1); anda pickup device (6), which engages the withdrawal opening (5) of the hopper (3) to withdraw a single sheet (2) from the stack (4) through the withdrawal opening (5), and feed the sheet (2) to the packing line;the feed unit (1) being characterized by comprising:at least one first supporting member (16), which is located at the withdrawal opening (5) and perpendicular to the feed direction (D1) to reduce the passage section of the withdrawal opening (5) and retain the sheets (2) in the stack (4) inside the hopper (3), and is movable in an adjustment direction (D2) perpendicular to the feed direction (D1); andan adjusting member (17) for adjusting, in use, the position of the first supporting member (16) in the adjustment direction (D2) as a function of the size, measured in the adjustment direction (D2), of the sheets (2) located close to the withdrawal opening (5).
- A feed unit as claimed in Claim 1, wherein the adjusting member (17) is elastic, and pushes the first supporting member (16) elastically with a given force towards the stack (4) in the adjustment direction (D2).
- A feed unit as claimed in Claim 2, and comprising a deformable elastic body (18), which has a first portion (19) defining the first supporting member (16), and a second portion (20) defining the elastic adjusting member (17).
- A feed unit as claimed in Claim 3, wherein the first portion (19) of the elastic body (18) is perpendicular to the feed direction (D1) and forms an angle of over 90° with the second portion (20).
- A feed unit as claimed in Claim 4, wherein the first portion (19) of the elastic body (18) forms an obtuse angle of 95° to 110° with the second portion (20).
- A feed unit as claimed in Claim 3, 4 or 5, wherein the second portion (20) of the elastic body (18) is L-shaped.
- A feed unit as claimed in any one of Claims 3 to 6, wherein the second portion (20) of the elastic body (18) is fixed rigidly in an adjustable position to a fixed frame (15) of the hopper (3).
- A feed unit as claimed in one of Claims 3 to 7, wherein the deformable elastic body (18) is made of elastic spring steel.
- A feed unit as claimed in any one of Claims 2 to 8, wherein the elastic adjusting member (17) pushes in the adjustment direction (D2) the sheets (2) located close to the withdrawal opening (5).
- A feed unit as claimed in any one of Claims 1 to 9, and comprising at least one nozzle (23) connected to a compressed-air source (24) and located close to the withdrawal opening (5) to blow a jet of compressed air onto the stack (4) in a blow direction (D3) parallel to the sheets (2).
- A feed unit as claimed in Claim 10, wherein the first supporting member (16) is located at a first lateral wall (12) of the stack (4), and the nozzle (23) is positioned facing a second lateral wall (25) of the stack (4) perpendicular to the first lateral wall (12).
- A feed unit as claimed in Claim 11, wherein the adjustment direction (D2) is perpendicular to the first lateral wall (12) of the stack (4), and the blow direction (D3) is perpendicular to the adjustment direction (D2) and to the second lateral wall (25) of the stack (4) .
- A feed unit as claimed in any one of Claims 1 to 12, and comprising a stop member positioned contacting a third lateral wall (13) of the stack (4) on the opposite side to the first supporting member (16).
- A feed unit as claimed in any one of Claims 1 to 13, and comprising a number of second supporting members (11) located in a fixed position at the withdrawal opening (5) and perpendicular to the feed direction (D1) to reduce the passage section of the withdrawal opening (5) and retain the sheets (2) in the stack (4) inside the hopper (3).
- A feed unit as claimed in Claim 14, and comprising three second supporting members (11) equally spaced along the third lateral wall (13) of the stack (4); and two second supporting members (11) located along the first lateral wall (12) of the stack (4) parallel to and opposite a third lateral wall (13); a first supporting member (16) being located at the first lateral wall (12) of the stack (4) and between the two second supporting members (11).
- A feed unit as claimed in any one of Claims 1 to 15, wherein the position of the second supporting members (11) is adjustable.
- A feed unit as claimed in Claim 1, wherein the adjusting member (17) comprises a motor to move the first supporting member (16) in the adjustment direction (D2).
- A feed unit as claimed in Claim 17, wherein the adjusting member (17) comprises a sensor, which controls the motor and determines the actual size and/or arrangement of the sheets (2) located close to the withdrawal opening (5).
- A feed unit as claimed in any one of Claims 1 to 18, wherein the pickup device (6) comprises a wheel (8) rotating about a respective central axis (9); and at least one suction pickup head (10) fitted to the wheel (8) to move cyclically along an endless path and through a loading station, where the pickup head (10) engages the withdrawal opening (5) of the hopper (3) to withdraw a respective sheet (2), and through a follow-up unloading station, where the pickup head (10) feeds the sheet (2) to the packing line.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000678A ITBO20050678A1 (en) | 2005-11-07 | 2005-11-07 | SUPPLY UNIT OF SHEETS TO A COLLECTION LINE |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1783077A1 true EP1783077A1 (en) | 2007-05-09 |
Family
ID=37635820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06123491A Withdrawn EP1783077A1 (en) | 2005-11-07 | 2006-11-03 | Feed unit for feeding sheets to a packing line |
Country Status (4)
Country | Link |
---|---|
US (1) | US20070182084A1 (en) |
EP (1) | EP1783077A1 (en) |
CN (1) | CN1966372A (en) |
IT (1) | ITBO20050678A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2731632A1 (en) * | 1977-07-13 | 1979-02-01 | Hauni Werke Koerber & Co Kg | DEVICE FOR SINGLE SHEET REMOVAL FROM THE UNDER SIDE OF A STACK OF SHEETS, IN PARTICULAR A CUTTING STACK FOR THE TOBACCO PROCESSING INDUSTRY |
GB2053133A (en) * | 1979-06-13 | 1981-02-04 | Bosch Gmbh Robert | Apparatus for removing folding box blanks from a stationary magazine and erecting and transferring the blanks |
DE4430701A1 (en) * | 1994-08-30 | 1996-03-07 | Iwk Verpackungstechnik Gmbh | Dispenser for flat-form sheets |
EP0970885A1 (en) * | 1998-07-06 | 2000-01-12 | G. D Societa per Azioni | Unit for supplying blanks on a packing machine |
EP1050498A2 (en) * | 1999-05-03 | 2000-11-08 | Klöckner Medipak GmbH | Method and device for separating and supplying box blanks |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3655181A (en) * | 1970-12-23 | 1972-04-11 | Harold E Paulson | Printing press feeder |
CH563934A5 (en) * | 1973-06-21 | 1975-07-15 | Bobst Fils Sa J | |
IT1000889B (en) * | 1973-11-21 | 1976-04-10 | Gd Spa | DEVICE FOR DISPLACING STACKS OF PARTICULARLY BLANKED OR DIE-CUT SHEETS OF CARDBOARD AND SIMILAR TO FEED INDIVIDUALLY TO CIGARETTE CONDITIONING MACHINES IN PACKAGES OF THE TYPE WITH HINGED LID |
US3924523A (en) * | 1974-12-19 | 1975-12-09 | Monarch Marking Systems Inc | Pinning machine and method |
US4231565A (en) * | 1976-11-12 | 1980-11-04 | Canon Kabushiki Kaisha | Paper feed device |
SE419965B (en) * | 1979-12-21 | 1981-09-07 | Volvo Ab | DEVICE FOR Separating an end topic from a stack of topics |
US4405124A (en) * | 1981-12-17 | 1983-09-20 | Tomoe Special Machine Co., Ltd. | Tag feed mechanism |
SE454150B (en) * | 1984-09-12 | 1988-04-11 | Tetra Pak Ab | DEVICE FOR PACKAGING MACHINE |
US5344133A (en) * | 1993-02-25 | 1994-09-06 | Eastman Kodak Company | Vacuum belt feeder having a positive air pressure separator and method of using a vacuum belt feeder |
US5547336A (en) * | 1995-09-29 | 1996-08-20 | Riverwood International Corporation | Magazine release assembly |
DE19823649B4 (en) * | 1998-05-27 | 2004-07-29 | Kolbus Gmbh & Co. Kg | Device for separating blanks |
US6390461B1 (en) * | 2000-03-13 | 2002-05-21 | Bell & Howell Mail & Messaging Technologies Company | Insert hopper and method for improving the operation thereof |
US6698748B1 (en) * | 2000-09-25 | 2004-03-02 | H. W. Crowley | System and method for singulating a stack of sheet-like materials |
US6616137B2 (en) * | 2001-02-02 | 2003-09-09 | Heidelbergerdruckmaschinen Ag | Adjustable needles for a sheet separating device |
-
2005
- 2005-11-07 IT IT000678A patent/ITBO20050678A1/en unknown
-
2006
- 2006-11-03 EP EP06123491A patent/EP1783077A1/en not_active Withdrawn
- 2006-11-06 US US11/593,326 patent/US20070182084A1/en not_active Abandoned
- 2006-11-07 CN CNA200610138551XA patent/CN1966372A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2731632A1 (en) * | 1977-07-13 | 1979-02-01 | Hauni Werke Koerber & Co Kg | DEVICE FOR SINGLE SHEET REMOVAL FROM THE UNDER SIDE OF A STACK OF SHEETS, IN PARTICULAR A CUTTING STACK FOR THE TOBACCO PROCESSING INDUSTRY |
GB2053133A (en) * | 1979-06-13 | 1981-02-04 | Bosch Gmbh Robert | Apparatus for removing folding box blanks from a stationary magazine and erecting and transferring the blanks |
DE4430701A1 (en) * | 1994-08-30 | 1996-03-07 | Iwk Verpackungstechnik Gmbh | Dispenser for flat-form sheets |
EP0970885A1 (en) * | 1998-07-06 | 2000-01-12 | G. D Societa per Azioni | Unit for supplying blanks on a packing machine |
EP1050498A2 (en) * | 1999-05-03 | 2000-11-08 | Klöckner Medipak GmbH | Method and device for separating and supplying box blanks |
Also Published As
Publication number | Publication date |
---|---|
CN1966372A (en) | 2007-05-23 |
US20070182084A1 (en) | 2007-08-09 |
ITBO20050678A1 (en) | 2006-02-06 |
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