US20010000594A1 - Feeding apparatus for wrapping machine - Google Patents
Feeding apparatus for wrapping machine Download PDFInfo
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- US20010000594A1 US20010000594A1 US09/733,149 US73314900A US2001000594A1 US 20010000594 A1 US20010000594 A1 US 20010000594A1 US 73314900 A US73314900 A US 73314900A US 2001000594 A1 US2001000594 A1 US 2001000594A1
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- objects
- selector plate
- pistons
- opening
- holes
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- 230000002093 peripheral effect Effects 0.000 claims description 30
- 235000009508 confectionery Nutrition 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract 1
- 238000002788 crimping Methods 0.000 description 13
- 238000004140 cleaning Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B25/00—Packaging other articles presenting special problems
- B65B25/005—Packaging other articles presenting special problems packaging of confectionery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B35/00—Supplying, feeding, arranging or orientating articles to be packaged
- B65B35/06—Separating single articles from loose masses of articles
- B65B35/08—Separating single articles from loose masses of articles using pocketed conveyors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B41/00—Supplying or feeding container-forming sheets or wrapping material
- B65B41/18—Registering sheets, blanks, or webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
- B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
- B65B9/067—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web advancing continuously
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/84—Star-shaped wheels or devices having endless travelling belts or chains, the wheels or devices being equipped with article-engaging elements
- B65G47/846—Star-shaped wheels or wheels equipped with article-engaging elements
Definitions
- the present invention ensures that the objects to be wrapped are held and positively and timely placed on the conveyor, and that the wrapper seals are located precisely by using a gripping conveyor that grips successive objects to be wrapped through the wrapping film and holds the film in place relative to the objects while the film is being sealed and cut off.
- the apparatus for feeding objects uniformly to a conveyor of a wrapping machine.
- the apparatus comprises a hopper having a floor pan and an upright peripheral wall.
- the floor pan has an opening for passing objects therethrough to the conveyor.
- a selector plate is located adjacent to the floor pan and has a plurality of holes therethrough for loosely accommodating the objects.
- Means are provided for moving the selector plate to cause the objects to enter the holes and for causing the holes to be located selectively over the peripheral opening.
- a spring finger is mounted in the peripheral wall and extends to engage and retain an object in the selected hole located over the peripheral opening.
- a piston is located opposite a selected selector plate hole located over the peripheral opening.
- timed actuator means are provided for actuating the piston to push the object past the spring finger and through the peripheral opening.
- FIG. 1 is a front elevational view of a preferred embodiment of a wrapping machine according to the present invention
- FIG. 2 is a rear elevational view of the machine shown in FIG. 1;
- FIG. 2A is a rear elevational view similar to FIG. 2, but showing the gripping conveyor tilted up for cleaning and access purposes;
- FIG. 3 is a vertical sectional view through the gripping conveyor of the machine of FIGS. 1 and 2;
- FIGS. 4A to 4 C are enlarged perspective views of the gripping finger assemblies used in the gripping conveyor of FIG. 3, showing the operation of the gripping fingers;
- FIG. 5 is a rear elevational view, partly broken away of the gripping conveyor
- FIG. 6 is an enlarged perspective view of the folder used on the wrapping machine shown in FIG. 1;
- FIG. 7 is a plan view that the hopper section used to select and deliver the objects to be wrapped to the deliver conveyor in the machine of FIG. 1;
- FIG. 8 is an enlarged plan view of the portion of FIG. 7 indicated by chain dotted line 8 ;
- FIG. 9 is a vertical sectional view taken along lines 9 - 9 of FIG. 8.
- FIG. 10 is a plan view similar to FIG. 8, but with the ejector wheel and its drive removed for the purposes of illustration.
- Wrapping machine 10 includes a table or base 12 , a magazine or hopper or input tray 14 for receiving objects to be wrapped in machine 10 .
- the objects can be food items, such as candies, or they could be any other objects that are desired to be wrapped individually.
- the objects are generally uniform in size and relatively rigid or incompressible, although some resiliency in the objects would be tolerable as well.
- Machine 10 also includes a delivery conveyor 16 for receiving the objects from input tray 14 and delivering same to a gripping conveyor 18 .
- a film stand 20 contains rolls of wrapping film 22 , one of which is led through a series of rollers 24 down to a folder 26 , as described in more detail below in connection with FIG. 6.
- Folder 26 folds the longitudinal edges of film 22 downwardly over the objects on delivery conveyor 16 to partially wrap the objects. These partially wrapped objects are then fed into gripping conveyor 18 , where the objects are gripped through the wrapping film by clamping devices 28 .
- Gripping conveyor 18 then carries the objects and the wrapping film along through crimping wheels 30 where the longitudinal edges of the wrapping film are crimped and sealed together. Further crimping devices 32 and 34 (see FIG.
- Machine 10 includes a drive motor 35 , which drives all of the conveyors and crimping wheels in machine 10 , also as will be described in further detail below.
- delivery conveyor 16 delivers the objects to be wrapped, as indicated by dotted lines 36 , to gripping conveyor 18 .
- Delivery conveyor 16 is an endless, longitudinally movable belt in the form of a chain conveyor having a plurality of transverse, equi-spaced fingers or projections 38 mounted thereon. Projections 38 extend upwardly through a slot 40 (see FIG. 8 ) formed in an elongate table 42 mounted in machine base 12 . The spaces between projections 38 form longitudinally arranged stations, each station being adapted to receive one object 36 to be wrapped.
- Delivery conveyor 16 is moved or driven longitudinally by a sprocket 44 (see FIG. 1) mounted on a shaft 46 .
- Shaft 46 is driven by a drive chain 48 coupled to drive motor 35 .
- Gripping conveyor 18 is located adjacent to delivery conveyor 16 to receive objects 36 , which are now partially wrapped. Referring again to FIG. 1, it will be recalled that the film 22 passes under folder 26 where the film edge portions are folded downwardly along side objects 36 to partially wrap the objects.
- Gripping conveyor 18 includes a plurality of clamping devices 28 spaced apart longitudinally equidistantly with the delivery conveyor stations or projections 38 .
- Gripping conveyor 18 is an endless belt in the form of a conveyor chain 49 upon which are mounted clamping devices 28 .
- Clamping devices 28 include guide blocks 50 which are attached to conveyor chain 49 and gripping fingers 52 , 54 mounted in pairs in guide blocks 50 for transverse sliding movement therein.
- the gripping fingers 52 and 54 of each pair of gripping fingers 52 , 54 include respective opposed jaws 56 , 58 for gripping the partially wrapped objects 36 and holding same during the completion of the wrapping operation and severance of the wrapped objects.
- Jaws 56 , 58 include U-shaped blocks having spaced-apart distal portions 60 and 62 . Distal portions 60 , 62 on respective opposed jaws 56 , 58 face each other, and these distal portions 60 and 62 are concave to help hold objects 36 that are round or oblong in shape.
- Jaws 56 and 58 are located at one end of gripping fingers 52 , 54 .
- the opposite ends of gripping fingers 52 , 54 form cam end portions 64 and 66 that define cam followers.
- a transverse cam follower 68 is mounted in cam end portion 64 , and the end 70 (see FIG. 4 c ) of cam end portion 66 actually forms a cam follower.
- FIG. 4 c is the same as FIG. 4 a with portions of FIG. 4 a removed to show more clearly cam follower end 70 .
- Gripping fingers 52 , 54 are spring biased into the closed position as indicated in FIG. 4 a by springs 72 and 74 .
- Spring 72 extends between cap screws 76 and 78 mounted respectively in cam end portion 64 and guide block 50 .
- spring 74 extends between cap screws 80 and 82 mounted respectively in guide block 50 and gripping finger 54 . It will be appreciated that other bias means or ways to attach springs 72 and 74 could be employed in clamping devices 28 , if desired.
- Gripping fingers 52 , 54 are actuated by a plurality of cams 84 , 86 and 88 , 90 , as seen best in FIGS. 3 to 5 .
- the jaws 56 and 58 are closed as indicated in FIG. 4A.
- Cam 84 bears against cam follower 68 to cause gripping finger 52 to retract
- cam 86 bears against cam follower end 70 to cause gripping finger 54 to extend, thus opening jaws 56 , 58 as indicated in FIG. 4B.
- the open jaws are thus in a position to allow a partially wrapped object 36 to enter therebetween from delivery conveyor 16 as indicated at the left hand end of FIG. 3.
- cams 84 , 86 allow the jaws to close and clamp onto object 36 .
- cams 88 , 90 cause gripping fingers 52 , 54 to separate releasing a wrapped object 37 .
- Cams 84 , 86 and 88 , 90 are adjustable longitudinally and transversely to adjust the opening and closing positions of clamping devices 28 and the width of opening of jaws 56 and 58 .
- crimping wheels 30 crimp together and seal the adjacent lower peripheral edge portions 92 of wrapping film 22 .
- crimping wheels 30 can be heated, if required. Depending on the type of wrapping film used, in some applications only one set of crimping wheels 30 may be needed.
- cut-off wheel 34 has a plurality of radial fingers with transverse cutting blades 98 mounted therein
- cut-off wheel 32 has a plurality of radial fingers with transverse end surfaces that form anvils for blades 98 to cut the wrapping film.
- cut-off wheels 32 , 34 can be heated, if required.
- the first set of horizontally arranged, opposed crimped wheels 30 and the second set of vertically arranged, opposed cut-off wheels 32 , 34 form crimping means located between clamping devices 28 for crimping closed and cutting off the wrapping film 22 between the wrapped objects 36 .
- a chain and sprocket drive 100 is used to drive cut-off wheels 32 , 34 and gripping conveyor 18 .
- a gear train drive could be used as well, as will be appreciated by those skilled in the art.
- a gear train drive 102 is used to drive crimp wheels 30 , but another type of drive could be used for this purpose as well.
- Gripping conveyor 18 , crimping wheels 30 and cut-off wheels 32 , 34 are all driven in synchronization with delivery conveyor 16 .
- position or speed adjustment between the various drives or components could be provided as well, as will be appreciated by those skilled in the art.
- gripping conveyor 18 swings up and out of the way as indicated by arrow 104 for cleaning purposes, or for helping to feed the wrapping film through the machine on start-up, and especially through crimping wheels 30 and cut-off wheels 32 , 34 .
- FIG. 6 shows a partially wrapped object 36 about to be grasped by a clamping device 28 , the remainder of gripping conveyor 28 being omitted from FIG. 6 for the purposes of clarity.
- Input tray assembly 14 is used to deposit objects 36 onto delivery conveyor 16 in a precise and controlled manner.
- Input tray 14 includes a circular hopper 118 having a floor pan 120 (see FIG. 9) and an upright peripheral wall 122 .
- Floor pan 120 has an opening 124 adjacent to peripheral wall 122 for passing objects 36 therethrough to delivery conveyor 16 .
- a selector plate 126 in the form of a conical disc is located adjacent to floor pan 120 and has a plurality of holes 128 located equidistantly around the periphery of selector plate 126 .
- the holes 128 are selectively positioned over or located in registration with floor pan opening 124 . Holes 128 are dimensioned to loosely accommodate objects 36 and tapered entry slots 130 assist the objects loaded into input tray 14 to fall into these holes 128 . To assist in this, it will be noted that entry slots 130 are offset from the radial direction. Selector plate 126 rotates in the direction of arrow 131 , so entry slots 130 lead into the feed of the objects in tray 14 . Where the objects are not spherical, a rotating brush 132 driven by motor 134 is used to cause the objects to lie down flat in holes 128 .
- selector plate 126 has a peripheral edge portion 136 that is undercut adjacent to holes 128 , as indicated by dashed line 137 in FIG. 10.
- This edge portion 136 has a thickness that is less than objects 36 , so that a portion of the objects 36 extends below selector plate 126 and slides along floor pan 120 .
- a spring finger 138 extends through an opening 139 in peripheral wall 22 and engages the objects 36 preventing them from falling through floor pan opening 124 by themselves.
- a rotatable ejector wheel 140 having a plurality of radially disposed pistons 142 is mounted adjacent to peripheral wall 122 of hopper or input tray 14 .
- Ejector wheel 140 rotates in synchronization with selector plate 126 so that pistons 142 line up with respective holes 128 as they pass over opening 124 .
- An aligned piston 142 is then actuated to eject or push the object 36 past spring finger 138 and through peripheral opening 124 onto delivery conveyor 16 in engagement with a projection 38 .
- projections 38 can have resilient receiving portions 143 to cushion the landing of objects 36 as they fall onto projections 38 .
- Pistons 142 have cam followers 144 (see FIGS.
- Cams 146 and cam followers 144 form timed actuator means for actuating pistons 142 to eject or push the objects 36 onto delivery conveyor 16 .
- Pistons 142 are spring biased into the extended position and cam 146 acting on cam followers 144 causes the pistons to retract until they are just over a selected hole 128 , at which time cam 146 ends allowing the release of the respective piston 146 .
- a double acting cam could be used as will be appreciated by those skilled in the art, to operate the pistons in both directions.
- a single piston could be used, or fewer or more pistons could be used, with appropriate changes to the rotational speed of ejector wheel 140 .
- the rotation of ejector wheel 140 together with the operation of cam 146 and cam followers 144 forms timed actuator means for actuating the pistons to push the objects through to the delivery conveyor 16 .
- the position of cam 146 is adjustable to vary the timing of pistons 142 . It will be noted from FIGS. 7, 8 and 10 that a guard 145 is provided to prevent objects 36 from entering the area of ejector wheel 140 unless they are properly positioned in the holes 128 .
- delivery conveyor 16 includes laterally adjustable guideways 147 for guiding or directing objects 36 along conveyor 16 .
- ejector wheel 140 is driven by a suitable chain and sprocket drive 148 , and the entire assembly is allowed to swing up as indicated by arrow 150 for cleaning purposes.
- Conical selector plate 126 is driven by a chain and sprocket drive 152 .
- Selector plate 126 is mounted on a telescopic shaft 154 to allow selector plate 126 to lift up, also for cleaning purposes.
- an oscillating film advancement mechanism in the form of pivoting fingers 156 located on the underside of table 42 may be provided to give a slight transverse push on wrapping film 22 where printed films are used in wrapping machine 10 and the film is subject to stretching.
- This transverse push prior to the following clamping device 28 closing in effect, shortens or advances the wrapping film to compensate for any stretching and ensure that the film remains in registration in wrapping machine 10 .
- Pivoting adjustment fingers 156 are actuated by solenoids 158 which are controlled by proximity sensors or photocells 160 , 162 .
- Sensor 160 is mounted on film stand 20 adjacent to wrapping film 22 (see FIG. 1) to detect film registration indicia.
- Sensor 162 is mounted adjacent gripping conveyor 18 to determine the position of clamping devices 28 .
- Sensor 160 is used to determine if the film is out of registration, and the other sensor 162 determines if the film is stretching and too late for clamping devices 28 . It will be appreciated that other mechanisms could be employed for this purpose as well.
- a quantity of objects to be wrapped is loaded into hopper or input tray 14 .
- the rotating conical selector plate 126 causes the objects to fall into holes 128 .
- the filled holes pass over floor pan opening 124 , first of all, they are prevented from dropping therethrough by spring finger 138 until the precise time required, at which time a respective piston 142 is released or actuated to push the object down onto delivery conveyor 16 .
- Film stand 20 and folder 26 then applies or places a continuous strip of wrapping film 22 on top of and in contact with objects 36 to be wrapped and folds the longitudinal edges of the film along side the objects to partially wrap the objects.
- the partial wrapped objects are then gripped through the wrapping film by the clamping devices 28 , or at least the gripping fingers, 52 , 54 thereof.
- Gripping conveyor 18 then pulls the gripped objects 36 off the delivery conveyor 16 .
- the wrapping film is then crimped along the bottom edges to seal these peripheral edges and the wrapping film is transversely crimped and cut off between the objects.
- the clamping devices 28 are then opened to release the wrapped objects.
- wrapping machine 10 is designed to wrap objects of a relatively uniform size and shape. Objects of different sizes and shapes can be accommodated with suitable modifications to the appropriate components. Many different types of drives could be used to operate the various conveyors and crimping wheels. Wrapping film 22 is shown to be applied on top of objects 36 , but the film could be arranged differently and applied beneath the objects and folded upwardly along side the objects, or even applied sideways to the objects. Input tray 14 is shown to be horizontally orientated, but it could be on an angle. Similarly, the gripper conveyor could be orientated differently, depending on how the wrapping film is applied to the objects.
- Wrapping machine 10 could be used without input tray 14 provided some other type of magazine or feed device is used to supply objects to delivery conveyor 16 .
- input tray 14 could be used by itself with another type of wrapping machine or device.
Abstract
A packaging machine is shown for individually wrapping objects, such as candies. The machine has a rotary hopper for selecting the objects to be wrapped, folding them and ejecting them precisely onto a delivery conveyor. A continuous wrapping film is laid over the objects on the delivery conveyor and the sides of the film are folded downwardly to partially wrap the objects. The objects are then gripped through the wrapping film by gripping fingers mounted on a second gripping conveyor. The gripping conveyor moves the objects along while the bottom edges of the wrapper are crimped, and the wrapper between the objects is then crimped and cut off. The gripping fingers then release the wrapped object.
Description
- This is a divisional application of application Ser. No. 09/365,512 filed Aug. 2, 1999.
- The present invention ensures that the objects to be wrapped are held and positively and timely placed on the conveyor, and that the wrapper seals are located precisely by using a gripping conveyor that grips successive objects to be wrapped through the wrapping film and holds the film in place relative to the objects while the film is being sealed and cut off.
- According to the invention, there is provided apparatus for feeding objects uniformly to a conveyor of a wrapping machine. The apparatus comprises a hopper having a floor pan and an upright peripheral wall. The floor pan has an opening for passing objects therethrough to the conveyor. A selector plate is located adjacent to the floor pan and has a plurality of holes therethrough for loosely accommodating the objects. Means are provided for moving the selector plate to cause the objects to enter the holes and for causing the holes to be located selectively over the peripheral opening. A spring finger is mounted in the peripheral wall and extends to engage and retain an object in the selected hole located over the peripheral opening. A piston is located opposite a selected selector plate hole located over the peripheral opening. Also, timed actuator means are provided for actuating the piston to push the object past the spring finger and through the peripheral opening.
- Preferred embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which:
- FIG. 1 is a front elevational view of a preferred embodiment of a wrapping machine according to the present invention;
- FIG. 2 is a rear elevational view of the machine shown in FIG. 1;
- FIG. 2A is a rear elevational view similar to FIG. 2, but showing the gripping conveyor tilted up for cleaning and access purposes;
- FIG. 3 is a vertical sectional view through the gripping conveyor of the machine of FIGS. 1 and 2;
- FIGS. 4A to4C are enlarged perspective views of the gripping finger assemblies used in the gripping conveyor of FIG. 3, showing the operation of the gripping fingers;
- FIG. 5 is a rear elevational view, partly broken away of the gripping conveyor;
- FIG. 6 is an enlarged perspective view of the folder used on the wrapping machine shown in FIG. 1;
- FIG. 7 is a plan view that the hopper section used to select and deliver the objects to be wrapped to the deliver conveyor in the machine of FIG. 1;
- FIG. 8 is an enlarged plan view of the portion of FIG. 7 indicated by chain dotted line8;
- FIG. 9 is a vertical sectional view taken along lines9-9 of FIG. 8; and
- FIG. 10 is a plan view similar to FIG. 8, but with the ejector wheel and its drive removed for the purposes of illustration.
- Referring firstly to FIGS. 1 and 2, a preferred embodiment of a wrapping machine according to the present invention is generally indicated by
reference numeral 10.Wrapping machine 10 includes a table orbase 12, a magazine or hopper or inputtray 14 for receiving objects to be wrapped inmachine 10. The objects can be food items, such as candies, or they could be any other objects that are desired to be wrapped individually. Preferably, however, the objects are generally uniform in size and relatively rigid or incompressible, although some resiliency in the objects would be tolerable as well. -
Machine 10 also includes adelivery conveyor 16 for receiving the objects frominput tray 14 and delivering same to a grippingconveyor 18. Afilm stand 20 contains rolls of wrappingfilm 22, one of which is led through a series ofrollers 24 down to afolder 26, as described in more detail below in connection with FIG. 6.Folder 26 folds the longitudinal edges offilm 22 downwardly over the objects ondelivery conveyor 16 to partially wrap the objects. These partially wrapped objects are then fed into grippingconveyor 18, where the objects are gripped through the wrapping film byclamping devices 28. Grippingconveyor 18 then carries the objects and the wrapping film along through crimpingwheels 30 where the longitudinal edges of the wrapping film are crimped and sealed together.Further crimping devices 32 and 34 (see FIG. 3) then transversely crimp and seal the wrapping film transversely between the objects being wrapped and also cut off the wrapping film to separate the wrapped objects, as will be described further below. Clampingdevices 28 then open to release the wrapped objects.Machine 10 includes adrive motor 35, which drives all of the conveyors and crimping wheels inmachine 10, also as will be described in further detail below. - Referring next, in particular, to FIGS.3 to 5, in addition to FIGS. 1 and 2, the gripping
conveyor portion 33 ofmachine 10 will now be described in further detail. As seen best in FIGS. 3 and 5,delivery conveyor 16 delivers the objects to be wrapped, as indicated bydotted lines 36, to grippingconveyor 18.Delivery conveyor 16 is an endless, longitudinally movable belt in the form of a chain conveyor having a plurality of transverse, equi-spaced fingers orprojections 38 mounted thereon.Projections 38 extend upwardly through a slot 40 (see FIG. 8) formed in an elongate table 42 mounted inmachine base 12. The spaces betweenprojections 38 form longitudinally arranged stations, each station being adapted to receive oneobject 36 to be wrapped.Delivery conveyor 16 is moved or driven longitudinally by a sprocket 44 (see FIG. 1) mounted on ashaft 46. Shaft 46 is driven by adrive chain 48 coupled to drivemotor 35. -
Gripping conveyor 18 is located adjacent todelivery conveyor 16 to receiveobjects 36, which are now partially wrapped. Referring again to FIG. 1, it will be recalled that thefilm 22 passes underfolder 26 where the film edge portions are folded downwardly alongside objects 36 to partially wrap the objects. Grippingconveyor 18 includes a plurality ofclamping devices 28 spaced apart longitudinally equidistantly with the delivery conveyor stations orprojections 38.Gripping conveyor 18 is an endless belt in the form of aconveyor chain 49 upon which are mountedclamping devices 28. Clampingdevices 28 includeguide blocks 50 which are attached toconveyor chain 49 and grippingfingers guide blocks 50 for transverse sliding movement therein. The grippingfingers fingers jaws objects 36 and holding same during the completion of the wrapping operation and severance of the wrapped objects. Jaws 56, 58 include U-shaped blocks having spaced-apartdistal portions Distal portions jaws distal portions objects 36 that are round or oblong in shape. - Jaws56 and 58 are located at one end of gripping
fingers fingers cam end portions transverse cam follower 68 is mounted incam end portion 64, and the end 70 (see FIG. 4c) ofcam end portion 66 actually forms a cam follower. FIG. 4c is the same as FIG. 4a with portions of FIG. 4a removed to show more clearlycam follower end 70. -
Gripping fingers springs Spring 72 extends betweencap screws cam end portion 64 and guideblock 50. Similarly,spring 74 extends betweencap screws guide block 50 and grippingfinger 54. It will be appreciated that other bias means or ways to attachsprings devices 28, if desired. - Gripping
fingers cams jaws Cam 84 bears againstcam follower 68 to cause grippingfinger 52 to retract, andcam 86 bears against cam follower end 70 to cause grippingfinger 54 to extend, thus openingjaws object 36 to enter therebetween fromdelivery conveyor 16 as indicated at the left hand end of FIG. 3. Whenobject 36 is in a position to be grasped byjaws cams object 36. Similarly, at the right hand end of grippingconveyor 18 as indicated in FIG. 3,cams cause gripping fingers object 37.Cams devices 28 and the width of opening ofjaws - As seen best in FIG. 3, between the time the
objects 36 are gripped or grasped by clampingdevices 28 as actuated bycams clamping devices 28 as actuated bycams wheels 30 crimp together and seal the adjacent lowerperipheral edge portions 92 of wrappingfilm 22. For this purpose, crimpingwheels 30 can be heated, if required. Depending on the type of wrapping film used, in some applications only one set of crimpingwheels 30 may be needed. After the lowerperipheral edges 92 of the wrapping film are crimped together, a second pair of vertically arranged, opposed crimping and cut-offwheels off wheel 34 has a plurality of radial fingers withtransverse cutting blades 98 mounted therein, and cut-off wheel 32 has a plurality of radial fingers with transverse end surfaces that form anvils forblades 98 to cut the wrapping film. Again, cut-offwheels crimped wheels 30 and the second set of vertically arranged, opposed cut-offwheels devices 28 for crimping closed and cutting off thewrapping film 22 between the wrapped objects 36. - Referring again to FIGS. 1 and 2, it will be seen that a chain and sprocket drive100 is used to drive cut-off
wheels gripping conveyor 18. However, a gear train drive could be used as well, as will be appreciated by those skilled in the art. Similarly, agear train drive 102 is used to drivecrimp wheels 30, but another type of drive could be used for this purpose as well. Grippingconveyor 18, crimpingwheels 30 and cut-offwheels delivery conveyor 16. However, position or speed adjustment between the various drives or components could be provided as well, as will be appreciated by those skilled in the art. - As indicated in FIG. 2A, gripping
conveyor 18 swings up and out of the way as indicated byarrow 104 for cleaning purposes, or for helping to feed the wrapping film through the machine on start-up, and especially through crimpingwheels 30 and cut-offwheels - Referring next to FIG. 6,
folder 26 will be described in further detail. Wrappingfilm 22 passes underfolding wings film 22 to be folded downwardly along side objects 36 to partially wrap objects 36.Film 22 is sufficiently wide that the longitudinal peripheral edge portions thereof wrap around and hang belowobjects 36 to be crimped by crimpingwheels 30, as discussed above. Folding wings orside arms adjustable guide plates film 22 to pass downwardly throughslots 114, 116 to come together beneathobject 36. FIG. 6 shows a partially wrappedobject 36 about to be grasped by aclamping device 28, the remainder of grippingconveyor 28 being omitted from FIG. 6 for the purposes of clarity. - Referring next to FIGS.7 to 10, the hopper or
input tray portion 14 of wrappingmachine 10 will now be described in further detail.Input tray assembly 14 is used to depositobjects 36 ontodelivery conveyor 16 in a precise and controlled manner.Input tray 14 includes acircular hopper 118 having a floor pan 120 (see FIG. 9) and an uprightperipheral wall 122.Floor pan 120 has anopening 124 adjacent toperipheral wall 122 for passingobjects 36 therethrough todelivery conveyor 16. Aselector plate 126 in the form of a conical disc is located adjacent tofloor pan 120 and has a plurality ofholes 128 located equidistantly around the periphery ofselector plate 126. Asconical selector plate 126 rotates, theholes 128 are selectively positioned over or located in registration withfloor pan opening 124.Holes 128 are dimensioned to loosely accommodateobjects 36 and taperedentry slots 130 assist the objects loaded intoinput tray 14 to fall into theseholes 128. To assist in this, it will be noted thatentry slots 130 are offset from the radial direction.Selector plate 126 rotates in the direction ofarrow 131, soentry slots 130 lead into the feed of the objects intray 14. Where the objects are not spherical, a rotatingbrush 132 driven bymotor 134 is used to cause the objects to lie down flat inholes 128. - As seen best in FIGS. 9 and 10,
selector plate 126 has aperipheral edge portion 136 that is undercut adjacent toholes 128, as indicated by dashedline 137 in FIG. 10. Thisedge portion 136 has a thickness that is less thanobjects 36, so that a portion of theobjects 36 extends belowselector plate 126 and slides alongfloor pan 120. Aspring finger 138 extends through anopening 139 inperipheral wall 22 and engages theobjects 36 preventing them from falling through floor pan opening 124 by themselves. - As seen best in FIG. 9, a
rotatable ejector wheel 140 having a plurality of radially disposedpistons 142 is mounted adjacent toperipheral wall 122 of hopper orinput tray 14.Ejector wheel 140 rotates in synchronization withselector plate 126 so thatpistons 142 line up withrespective holes 128 as they pass overopening 124. An alignedpiston 142 is then actuated to eject or push theobject 36past spring finger 138 and throughperipheral opening 124 ontodelivery conveyor 16 in engagement with aprojection 38. If desired,projections 38 can have resilient receivingportions 143 to cushion the landing ofobjects 36 as they fall ontoprojections 38.Pistons 142 have cam followers 144 (see FIGS. 8 and 9) that engage acam 146, which together actuate the pistons.Cams 146 andcam followers 144 form timed actuator means for actuatingpistons 142 to eject or push theobjects 36 ontodelivery conveyor 16.Pistons 142 are spring biased into the extended position andcam 146 acting oncam followers 144 causes the pistons to retract until they are just over a selectedhole 128, at whichtime cam 146 ends allowing the release of therespective piston 146. However, a double acting cam could be used as will be appreciated by those skilled in the art, to operate the pistons in both directions. Also, a single piston could be used, or fewer or more pistons could be used, with appropriate changes to the rotational speed ofejector wheel 140. The rotation ofejector wheel 140, together with the operation ofcam 146 andcam followers 144 forms timed actuator means for actuating the pistons to push the objects through to thedelivery conveyor 16. The position ofcam 146 is adjustable to vary the timing ofpistons 142. It will be noted from FIGS. 7, 8 and 10 that aguard 145 is provided to preventobjects 36 from entering the area ofejector wheel 140 unless they are properly positioned in theholes 128. - It will also be noted in FIG. 8 that
delivery conveyor 16 includes laterallyadjustable guideways 147 for guiding or directingobjects 36 alongconveyor 16. - As seen best in FIG. 1,
ejector wheel 140 is driven by a suitable chain andsprocket drive 148, and the entire assembly is allowed to swing up as indicated byarrow 150 for cleaning purposes.Conical selector plate 126 is driven by a chain andsprocket drive 152.Selector plate 126 is mounted on atelescopic shaft 154 to allowselector plate 126 to lift up, also for cleaning purposes. - Referring again to FIG. 6, an oscillating film advancement mechanism in the form of pivoting
fingers 156 located on the underside of table 42 may be provided to give a slight transverse push on wrappingfilm 22 where printed films are used in wrappingmachine 10 and the film is subject to stretching. This transverse push prior to thefollowing clamping device 28 closing, in effect, shortens or advances the wrapping film to compensate for any stretching and ensure that the film remains in registration in wrappingmachine 10. Pivotingadjustment fingers 156 are actuated bysolenoids 158 which are controlled by proximity sensors orphotocells Sensor 160 is mounted on film stand 20 adjacent to wrapping film 22 (see FIG. 1) to detect film registration indicia.Sensor 162 is mounted adjacentgripping conveyor 18 to determine the position of clampingdevices 28.Sensor 160 is used to determine if the film is out of registration, and theother sensor 162 determines if the film is stretching and too late for clampingdevices 28. It will be appreciated that other mechanisms could be employed for this purpose as well. - In operation, a quantity of objects to be wrapped is loaded into hopper or
input tray 14. The rotatingconical selector plate 126 causes the objects to fall intoholes 128. As the filled holes pass over floor pan opening 124, first of all, they are prevented from dropping therethrough byspring finger 138 until the precise time required, at which time arespective piston 142 is released or actuated to push the object down ontodelivery conveyor 16. Film stand 20 andfolder 26 then applies or places a continuous strip of wrappingfilm 22 on top of and in contact withobjects 36 to be wrapped and folds the longitudinal edges of the film along side the objects to partially wrap the objects. The partial wrapped objects are then gripped through the wrapping film by theclamping devices 28, or at least the gripping fingers, 52, 54 thereof. Grippingconveyor 18 then pulls the gripped objects 36 off thedelivery conveyor 16. The wrapping film is then crimped along the bottom edges to seal these peripheral edges and the wrapping film is transversely crimped and cut off between the objects. Theclamping devices 28 are then opened to release the wrapped objects. - Having described preferred embodiments of the invention, it will be appreciated that various modifications may be made to the structures described above. For example, wrapping
machine 10 is designed to wrap objects of a relatively uniform size and shape. Objects of different sizes and shapes can be accommodated with suitable modifications to the appropriate components. Many different types of drives could be used to operate the various conveyors and crimping wheels. Wrappingfilm 22 is shown to be applied on top ofobjects 36, but the film could be arranged differently and applied beneath the objects and folded upwardly along side the objects, or even applied sideways to the objects.Input tray 14 is shown to be horizontally orientated, but it could be on an angle. Similarly, the gripper conveyor could be orientated differently, depending on how the wrapping film is applied to the objects. - Wrapping
machine 10 could be used withoutinput tray 14 provided some other type of magazine or feed device is used to supply objects todelivery conveyor 16. Similarly,input tray 14 could be used by itself with another type of wrapping machine or device. - As will be apparent to those skilled in the art in the light of the foregoing disclosure, many alterations and modifications are possible in the practice of this invention without departing from the spirit or scope thereof. Accordingly, the scope of the invention is to be construed in accordance with the substance defined by the following claims.
Claims (6)
1. Apparatus for feeding objects uniformly to a conveyor of a wrapping machine, the apparatus comprising: a hopper having a floor pan and an upright peripheral wall, the floor pan having an opening for passing objects therethrough to said conveyor; a selector plate located adjacent to the floor pan and having a plurality of holes therethrough for loosely accommodating the objects; means for moving the selector plate to cause the objects to enter said holes and for causing said holes to be located selectively over the peripheral opening; a spring finger mounted in the peripheral wall and extending to engage and retain an object in the selected hole located over the peripheral opening; a piston located opposite a selected selector plate hole located over the peripheral opening, and timed actuator means for actuating the piston to push the object past the spring finger and through the peripheral opening.
2. Apparatus as claimed in wherein the selector plate has a peripheral edge portion located adjacent to said holes, the thickness of the peripheral edge portion being less than the objects, the spring finger being located adjacent to the peripheral edge portion to engage the objects.
claim 1
3. Apparatus as claimed in wherein the timed actuator means includes a rotatable ejector wheel having a plurality of radially disposed pistons mounted therein, said piston being one of said radially disposed pistons; the pistons including cam followers attached thereto; a cam located adjacent to the piston cam followers to actuate the pistons; and drive means for rotating the ejector wheel for the timed actuation of the pistons over the selector plate holes located over the peripheral opening.
claim 1
4. Apparatus as claimed in wherein the hopper is circular in plan view and the selector plate is a conical disc, the floor pan opening being located adjacent to the hopper peripheral wall and the selector plate holes being located equidistantly around the periphery of the selector plate for selective registration with the floor pan opening.
claim 1
5. Apparatus as claimed in wherein said pistons are spring actuated, the cam being arranged to retract the pistons until the pistons are located over a selector plate hole located over the peripheral opening upon which the piston is released.
claim 3
6. Apparatus as claimed in wherein the selector plate holes include tapered entry slots offset from the radial direction.
claim 1
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/733,149 US6371279B2 (en) | 1999-08-02 | 2000-12-08 | Feeding apparatus for wrapping machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/365,512 US6189300B1 (en) | 1999-08-02 | 1999-08-02 | Wrapping machine |
US09/733,149 US6371279B2 (en) | 1999-08-02 | 2000-12-08 | Feeding apparatus for wrapping machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/365,512 Division US6189300B1 (en) | 1999-08-02 | 1999-08-02 | Wrapping machine |
Publications (2)
Publication Number | Publication Date |
---|---|
US20010000594A1 true US20010000594A1 (en) | 2001-05-03 |
US6371279B2 US6371279B2 (en) | 2002-04-16 |
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ID=23439177
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/365,512 Expired - Fee Related US6189300B1 (en) | 1999-08-02 | 1999-08-02 | Wrapping machine |
US09/733,149 Expired - Fee Related US6371279B2 (en) | 1999-08-02 | 2000-12-08 | Feeding apparatus for wrapping machine |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/365,512 Expired - Fee Related US6189300B1 (en) | 1999-08-02 | 1999-08-02 | Wrapping machine |
Country Status (4)
Country | Link |
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US (2) | US6189300B1 (en) |
CN (1) | CN1160224C (en) |
AU (1) | AU6420400A (en) |
WO (1) | WO2001008977A2 (en) |
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CN102951322A (en) * | 2012-11-27 | 2013-03-06 | 上海龙腾机械制造有限公司 | Thin film release control mechanism |
CN104477428A (en) * | 2014-12-02 | 2015-04-01 | 成都三可实业有限公司 | Pillow type granular candy packing machine |
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CN102390113B (en) * | 2011-11-02 | 2015-05-13 | 汕头市甜甜乐糖果食品有限公司 | Automatic edge curling machine |
CN103991578B (en) * | 2014-05-23 | 2017-02-08 | 北京申晨机械设备有限公司 | Feeding device and food packaging line |
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CN105857731B (en) * | 2016-05-31 | 2019-03-12 | 台州市宝刚机械有限公司 | Sugar molding machine |
CN106428721A (en) * | 2016-10-20 | 2017-02-22 | 台州市宝刚机械有限公司 | Feeding device of candy double-kink packing machine |
DE102017122195A1 (en) * | 2017-09-25 | 2019-03-28 | Theegarten-Pactec Gmbh & Co. Kg | Process for the stacked packaging of small-sized products |
CN109552709B (en) * | 2017-09-26 | 2024-02-06 | 湖北职业技术学院 | Annular piece and common piece dual-mode winding packaging platform |
CN110217439B (en) * | 2019-06-24 | 2024-04-19 | 河南达新源新材料有限公司 | Plastic film roll end face packaging machine |
CN113212865B (en) * | 2021-04-01 | 2022-12-23 | 北新建材(天津)有限公司 | Full-automatic packing apparatus of panel |
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-
1999
- 1999-08-02 US US09/365,512 patent/US6189300B1/en not_active Expired - Fee Related
-
2000
- 2000-08-01 CN CNB008112630A patent/CN1160224C/en not_active Expired - Fee Related
- 2000-08-01 WO PCT/CA2000/000890 patent/WO2001008977A2/en active Application Filing
- 2000-08-01 AU AU64204/00A patent/AU6420400A/en not_active Abandoned
- 2000-12-08 US US09/733,149 patent/US6371279B2/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102951322A (en) * | 2012-11-27 | 2013-03-06 | 上海龙腾机械制造有限公司 | Thin film release control mechanism |
CN104477428A (en) * | 2014-12-02 | 2015-04-01 | 成都三可实业有限公司 | Pillow type granular candy packing machine |
Also Published As
Publication number | Publication date |
---|---|
WO2001008977A3 (en) | 2001-09-20 |
WO2001008977A2 (en) | 2001-02-08 |
CN1160224C (en) | 2004-08-04 |
US6189300B1 (en) | 2001-02-20 |
US6371279B2 (en) | 2002-04-16 |
CN1368924A (en) | 2002-09-11 |
AU6420400A (en) | 2001-02-19 |
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