US3047123A

US3047123A - Carton rotating and conveying apparatus

Info

Publication number: US3047123A
Application number: US11693A
Authority: US
Inventors: James G Mckay
Original assignee: Individual
Current assignee: Individual
Priority date: 1960-02-29
Filing date: 1960-02-29
Publication date: 1962-07-31
Anticipated expiration: 1979-07-31

Description

July 31, 1962 J. G. MGKAY CARTON RoTATING AND CONVEYING APPARATUS 4 Sheets-Sheet 1 Filed Feb. 29, 1960 16T ww Meg July 31, 1962 V J. G. MCKAY 3,047,123

CARTON ROTATING AND CONVEYING APPARATUS Fi1ed Feb. 29, 1960 4 sheets-sheet 2 July 31, 1962 .1. G. MCKAY 3,047,123

CARTON ROTATING AND CONVEYING APPARATUS Filed Feb. 29, 1960 July 31, 1962 J. G. MGKAY CARTON ROTATING AND CONVEYING APPARATUS WIM/g4 r .n....lf .1.51:

4 Sheets-Sheet Filed Feb. 29, 1960 United States Patent Giiiee 3,947,1Z Patented July 31, 1952 3,047,123 CARTN ROTATING AND CONVEYENG APPARATUS James G. McKay, 5138 N. Mobile Ave., Chicago, Ill. Filed Feb..29, 1960, Ser. No. 11,693 8 Ciaims. (Cl. 19S-33) This invention relates in general to a carton or box rotating and conveying system and more particularly relates to a diilerential drive box rotator and to an aligning arrangement for use in .an automatic conveying system.

Recent developments in automatic packaging equipment require that cartons or boxes be packed, sealed and imprinted reliably at high speed and that the equipment for performing these functions be adapted for a variable size box, container or package. The containers are provided with iiaps extending longitudinally along the top and parallel to the direction of travel to permit easy sealing under control of apparatus placed along the sides of the system, but then each carton or box must be rotated or turned to permit printing on one or both sides perpendicular to the long axis of the flaps. Approaches to the problem of turning the box to permit easy printing vary from manual to automatic, although the most usual is to provide an automatically operated turntable in the conveying line or system for rotating the boxes.

The use of turntables, however, limits the speed and versatility of the system as the containers or boxes are often of considerable weight and a suiiicient time interval must be allowed between containers to permit the tllrntable to receive the box and rotate or turn it. In addition, considerable complicated mechanism and apparatus must be provided to properly shift the boxes to and off the turntable and coordinate its movement with the res of the system or line.

In the present invention these problems are eliminated by the simple expedient of providing a pair of chains moving parallel with the conveyor route, but at diierent speeds to provide a net speed of movement of one chain relative the other for conveying a box along its normal route with one side moving faster than the other so that the box is turned without interruption of its progress. With this arrangement boxes weighing up to sixty pounds each have been readily rotated at the rate of sixty per minute.

ln addition, the apparatus of the present invention provides considerable exibility in the size of container which may be turned while being conveyed. Thus, normally .a pair of differential rotating chains are dimensioned to be fifty percent longer than the longest box to be turned with one chain moving at twice the speed of the other, but by the provision of a simple adjustable projection extending into the path of box travel for engaging one corner of a box greater than that length, the end of the box may be held while the other side is moved by one of the chains. This rotates the -box about the engaged corner and thus accomplishes the rotation for boxes of considerably greater than normal length.

For preventing excessive turning such as might occur if an extremely short box were lbeing conveyed and for otherwise guiding the boxes, adjustable brackets are provided adjacent the sides of the conveyor line for guiding the swivelled or turned box as it approaches the end of the turning chain run to prevent it from entering the conveyor route or channel at an angle of other than 90 to its original position.

To solve the problem of securing print registration on boxes moving at the high speed accommodated by this system, a simple cam controlled stop is provided for engaging the front of each box after it is rotated. This permits a lug synchronized with the type position thereafter to guide the box from a determined position. In addition, as each box may be immediately followed by another, an arrangement is provided for ensuring that the stop can engage the succeeding box for synchronizing or aligning its position with respect to the print roller.

It is, therefore, an object of the present invention to provide .an automatically operated, economical, ilexible and simpliied container rotator and aligning arrangement in a conveying system.

it is another object of the present invention to provide for the rotation of containers in a conveying system, while carrying the same along the normal direction of travel.

it is another object of this invention to provide for the high speed rotation and automatic conveying of variable size containers, which may carry substwtial weight.

it :is another object of this invention to provide simple, economical, automatically operated apparatus in a container conveyor system for synchronizing and adjusting the movement of .a rotated container with respect to apparatus positioned along the conveying route.

lt is still another object of this invention to ensure that an automatically rotated container in a conveying system is positioned to permit printing to be registered thereon in a predetermined location.

It is still another object of this invention to ensure that successive boxes moving at high speed in an automatic conveying system are synchronized and aligned by -permitting apparatus to engage the front position ofsuccessive boxes for retarding the motion thereof, although in close proximity to the rear portion of a preceding box.

A feature of this invention is the arrangement which conveys each carton along its path of travel, while rotating it.

Another feature of this invention is the provision of a pair of conveying belts, chains or like apparatus which move at different speeds to rotate a box being conveyed thereby.

Another feature of this invention is the provision of simple bracket arrangements for guiding boxes of considerable ditierence in size during .and after rotation of each box to ensure their proper position with respect to the conveying route.

Another feature of this invention is the provision of a simple bracket arrangement for cooperating with the conveying chain to rotate boxes of considerable length.

Another feature of this invention is the provision of a single cam controlled stop arrangement for aligning the position of each box with the position of certain moving apparatus displaced along the conveyor route.

Still another feature of this invention is the provision of a simple arrangement for tipping each box after being disengaged from the stop to permit the stop to engage the front of a succeeding box which may be in close proximity to the preceding box.

With the foregoing objects, features ,and advantages in view together with others which Will appear Vas the description proceeds, it wil-l be noted that the invention comprises certain novel features of construction, yarrangement and structure hereinafter more fully described, illustrated sin the accompanying drawings, and particularly pointed out in the appended claims, and that varilous changes in the form, proportion, size and minor details of the described construction, arrangement and structure may be made without departing from the spirit or sacrificing any of the advantages of the invention.

For the purpose of facilitating an understanding of this invention, there is illustrated in the accompanying drawings a preferred embodiment, from an inspection of `vvhich, when considered in connection with the following description, this invention, its mode of construction, as-

guiding that side of thebo-x.

sembly and operation, and many of its advantages should be readily understood [and appreciated.

Referring to the drawings in which the Same characters or reference are employed to indicate corresponding or similar parts throughoutthe several figures of the drawlings:

FIGS. 1 and Z 'are top and side views respectively of a conveying system incorporating the concepts of the present invention.

FIG. 3 is a fragmentary elevational view taken to show apparatus along several different planes.

FIG. 4 -is a fragmentary plan view showing some of the details of the print roll adjustment arrangement.

FIG. 5 is a fragmentary side elevational view of the conveying system showing the details of the stop arrangement whereby the box position is synchronized with the movement of the print roller.

FIGS. 6, 7 and 7a are detailed semi-diagrammatic views of respective chain segments.

FiG. 8 is a schematic view of the structure for powering the various apparatus of the conveying system.

FIG. 9 is a diagrammatic side view of the structure for positioning the boxes `and illustrating the relationship of various apparatus during the progress of moving a box over the conveying route.

FIG. 10 is a sectional View taken along the line 1li-16 in FIG. 1 and showing the manner in which la portion of the conveying apparatus is disposed.

FIG. 1l is a fragmentary sectional view taken along the line 11-11 in FIG. l illustrating one arrangement of the supporting wear and guide plates for the conveying chains.

The invention ygenerally may be described by reference to FIGS. 8 and 9 in conjunction with FIGS. 1 and 2. In FIG. 9 |a box or container indicated by the reference character 1110 is shown as it is initially received on the conveyor 2%. It is then carried by the conveying chains 7 as ymay be seen by reference to FIGS. l and 8 to the box rotating stage indicated at l. Rotation of the box at that stage permits the print to be registered on the yappropriate side of the box.

Stage l comprises the dierentially driven belts or chains 8 and 9 seen in FIGS. 1 and 9 which rotate the box indicated by the reference character 101 clockwise as indicated by the arrow, due -to the comparatively-rapid movement of chain 8 with respect to chain 9. The chain speed is controlled by the peripheral speed of the individually associated sprockets 94 and 95 respectively, which are, in tuin, driven from the shaft 91. Thus to turn a box that is for example substantially 50% as long as the chains i5 and 9, chain S is driven at twice the speed of chain 9. The length of the chains and speed oi movement are of course dictated by the needs of the system.

Y After the box 191 has been rotated, i-t is again carried forward by chains 7 and brought to a halt by the stop 85 in the position indicated by box 192.

As seen in FIG. 1, an adjustable bracket -15 is adjacent the end of chains S and 9 provided along one side of the conveyor and is mounted at an angle to the direction of box travel. A somewhat similarV bracket 18 is mounted at the other side of the conveyor 200 substantially opposite the bracket 15. Inasm-uch as the portion of the box carried by chain 8 is moving faster than the. portion carried by chain 9, the faster moving portion rotates about the'slower to swivel the long axis of the box beyond chain S. That side or portion will therefore engage bracket `15 which prevents excessive turning by Similarly, briacket 18 can engage .the other side of the box to prevent excessive turning. Both

brackets

15 ,and 18 are positioned to realign the box in a desired position with respect to the sides lill of the conveyor 20d and are arranged so that as the Y box is guided inwardly from either bracket, a turn of more than 90 is prevented bytheir presence.

Adjustable bracket 10 having the projection 11` extending over the chain 9 is provided when boxes of longer than normal dimension are to be handled. r[ihus such a box would not -be -fully turned by the time its front end reached the end of chains 8 and 9. Projection 11 engages the adjacent front corner of the box and holds it until the portion carm'ed by chain 8 is f-ully rotated at which time the engagedcorner is rotated out of engagement with projection 11 and guided by

brackets

15 and 18 into the desired position on the conveyor 200.

The stop is provided for the purpose of terminating movement of the box toward the print rol-ls 47 until the guides or lugs 35 are properly positioned with respect thereto. The lugs 35 are located in predetermined positions yon conveying chains 36 of the second or printing stage 2 with respect to the type face on print rolls 47 and are moved at a corresponding speed to insure that the print is registered lin the proper position on each box.

At the appropriate interval the stop 85V is released by earn S2 shown in FIGS. 5 and 8 and the box then given a slight forward and upward projection by a pair of serrated or knurled wheels indicated at 25. As the box 1412, for example, moves over the wheels, it tips forward to permit stop 85 immediately to Vengage the next box. A lug 35 on each of the conveying chains 36 engages the rear s-ide of the box 102. and moves it positively forward.

The position of the box with respect to the print rolls 47 is synchronized bythe engaging lugs 35 to insure that the print is proper-ly registered thereon.

Additional synchronizing means may be provided by inclined plate 10S seen in FIG. 5. As the box indicated by 1Mb may be carried -forward by chains 36, the box is raised above the level of the chains 36 and its movenient terminated. Lug 35 then cornes along and Vdrives the box forward. Its position is therefore synchronized with the print rolls.

The box, now designated 103 passes between the print rolls 47 on the print assembly generally indicated by the reference character 3l). The print rolls 47 act thereon to register print on either or both sides of the box, and it is thereafter conveyed forward to a position generally indicated by box 1134. VIt may then yeither be rotated again for another operation, as shown by boxes and 106, if necessary to permit easier unloading, or if otherwise desired, simply conveyed to a succeeding destination.

arrangement of they power-transmission system, it will be seen that a motor 119 furnishes power to the entire conveyor system whereby all movements are synchronized. The motor 110 carries an adjustable pulley 115 of any well known type, which may be manually adjusted by turning handle 111a and wheel 111 to rotate rod 112, which is supported by bracket 13 and threaded through nut 114. Motor 110 is reciprocated thereby to adjust the tension or engagement of belt 116 with respect t0 pulley 115. This is provided to vary the speed at which the system operates.

n The belt 116 transmits power to a gear reducer arrangement generally indicated at 117, which in turn drives the chains 113 and 118'. The chain 118 is driven in the direction indicated by the associated arrow, and Vother respective chains in the system are likewise driven in the `direction indicated by an arrow associated there. with.- Chain 113' is arranged to drive gear 34 in any well-known manner to drive in turn the print rollers 47 through gear '32 and shaft 31journalled at 33, as shown in FIG. 1. Alternatively gears 34 and 32. and the print rollers 47 may be driven by chains 118 in a manner vthat Y will become apparent.

Chain 11S drives sprocket 119 and its, connected shaft 12S. YSprocket 119 and shaft 120 have associated ,therewith a number of other sprockets for driving,` re-V spective chains 176 laterallyY displaced along shaft 120 l Referring now to FIG. 8 showing a general schematicv V 174, Iwhich are mounted on shaft 121. Shaft 121 carries a number of other sprockets 119 laterally displaced therealong including the sprocket 123. The power transmitted through shaft 121 to sprocket 123 is in turn transmitted over chain 122, for example, to a second stage box rotator arrangement indicated generally at 190 and operating similarly to the box rotating arrangement indicated at stage l, which will be discussed in further detail.`

Sprockets 119 transmit power by way of respective chains 36 to corresponding sprockets 117, which are mounted on shaft 19. This drives shaft 19 and its attendant apparatus including sprocket 26 and its chain S8, sprockets 23 and conveying chains 7 and the knurled or serrated wheels 25. Chain 88 rotates sprocket 81 mounted on a shaft 24 for controlling the cam 32, its follower rod 83 and the synchronizing stop 85 as may be seen in FIG. 8.

Power transmitted over the chains 7 is transmitted through the medium of respective sprockets 6 through the shaft 5 to chain 93 by way of sprocket 96. Chain 9S transmits this power to sprocket 97 mounted on shaft 91, Vand shaft 91 in turn transmits this power to the sprockets 94 and 95 and the chains 8 and 9 controlled thereby. V

The shaft 91 has mounted thereon a pair of sprockets 94 and 95 of diering diameter whereby their outer peripheries rotate at dierent speeds. The chains 8 and 9 are caused to rotate by sprockets 95 and 94 respectively, and in turn drive

respective sprockets

13 and 13a, each having an associated shaft 13b. This comprises the box rotating stage l and is generally similar to the box rotating arrangement indicated at 190.

Referring now more specifically to FIGS. l and 2 it will be seen that the conveyor system comprises, in addition to the power transmission arrangement just described, the support members or side plates 261 extending the longitudinal distance of the conveyor Ztl@ and in which the

respective shafts

5, 13b, 24, 19, 121 and 120, etc. are suitably supported. The side plates 261 are each supported adjacent both ends by legs such as 14. The particular method of support, however, forms no part of this invention, it being understood that, if desired, the entire assembly may be placed on, for example, casters and its position changed as needed.

Forming the conveyor table and supported between the side plates 201 are a number of horizontal support members 3 forming a table forV supporting wear blocks 4d and/or guide plates such as 4, 127 and 171 under and adjacent respective edges of

chains

7, 36 and 176, for example as seen in FIG. ll. This prevents the chains from sagging under the weight of any box placed thereon. It will be appreciated that the diierential or box rotating chains 8 and 9 may likewise be supported by guide plates or wear blocks such as 4c, for' example shown in FIG. 7, and that they are supported slightly above the level of the other chains. This permits the chains 8 and 9 to disengage a box from chains 7 by lifting the box slightly.

As may he seen in FIGS. l, 3, 6, 7 and 7a, the chains 8 md 9 comprise a number of segments each wider than chains 7 for the purpose of providing a support area commensurate with that supplied by the larger number of conveying chains 7. Generally, by making chain segments such as 9a each 3 to 31/2 inches wide and 1% inches long, the needed support area is adequately provided. Chains 8 and 9 are otherwise generally similar in construction and operation to chains 7 and other chains in the system in that each segment may have an extending central ear 9b, for example, which tits between a pair of extending ears `9c on the next segment and is held engaged therewith by a pin 19', while corresponding sprocket indentations engage each chain segment adjacent the central extending ear to either move or be moved by each chain segment as it engages the sprocket.

A box rotating or twister bracket 10 is adjustably mounted on a pin 12 adjacent to the ,conveyor chains 8 for a run of boxes of longer than normal length which.

may not be fully turned by chains 8 and 9 in their length. As each box approaches the position of projection 11, the projection momentarily engages the corner thereof. This prevents forward movement of that corner, while the opposite corner being free, is moved forward by chain 8 so that the box pivots around 11 until the engaged corner is disengaged from projection 11 and the box is carried forward and guided by brackets 15 and 1S.

Brackets 15 and 1S mounted on each side of the conveying chains '7 serve to guide the boxes into the main conveying path or route and to prevent excessive turning of the boxes., Bracket 15 is adjusted to a desired position with respect to the box path by means of arms 17 and the posts supporting the same, while bracket 18 is similarly adjusted by means of arms 16. As already discussed, if the boxes are shorter than 50% of the length of the differential claims 8 and 9, they have a tendency to be turned more than 90.

Brackets

15 and 18 each prevent this by engaging one of the turned sides and displacing the box toward the normal path due to the angle at which they `are set and adjusted.

In addition to the brackets discussed, other brackets not shown are usually disposed along the conveying route for guiding the boxes, and maintaining box alignment or may be used to guide each box in a desired direction.

After being carried past the box rotating stage l, each box is engaged in succession by a pair of stops 85. As may be seen in FIG. 5, each stop is pivotally supported at pin Si? by means of an arm 84. The arm S4 is controlled by a follower arm 83, which rides cam S2. Cam 82 is mounted on shaft 24, which in turn is powered by

sprockets

26 and 27 and the chain S8 as already mentioned. The position of cam S2 and its speed of operation are controlled with respect to lugs 35 on conveying chains 36 to drop the arm 83 in synchronism with a predetermined position of lugs 35 to disengage the stop 85 from box 102, for example, at the proper interval. Box 192 then moves forward under the influence of chains 7 until it engages serrated wheels '25. The disposition of the apparatus along the shaft 19 upon which wheels 25 are mounted is probably best seen in FIGS. 5 and l0. The view in FIG. 5 is taken in the plane of the shaft 91 and also in the plane of shaft 19 to show the lateral relationship of the various components including some of the printing apparatus.

The wheels 25 being of somewhat larger circumference than the associated sprockets and chains raise the box, and as it passes thereover, the front-end of the box tips forward to raise the back end, as shown by diagrammatically illustrated box 102e in FIG. 5. As ,the boxes are moving at high speed, this permits the stop 85 to immediately engage the succeeding box without interference. As box 102a moves forward under the influence of serrated wheels 25, it is positively engaged by the lugs 35 on chains 36 as shown by box 10211 so that its position with respect to the printing rolls 47 is synchronized and the box is carried toward the printing assembly 30.

As already mentioned, another type of simple synchronizing means may be used. Thus plate 10S which has an inclined surface may raise box ltZb above the level of Chains 36 as it is carried forward. It will now wait until one of the lugs 35 positively engages its back wall land moves it forward in synchronism with the print rolls.

The printing assembly 30 on each side of the conveyor 209 is driven as may best be seen in FIG. 3 from chain 118' through

respective gears

34 and 32, and lshafts 31. Each shaft 31 is journalled and supported at 33 and 33a on the respective side 201 and in turn rotatable supports a print table 49 at 99. The table 49 carries shafts 46,

7 44, 41, 29 and 55, which support ink rolls 45, 43 and 42, gear 38 and print roll 47 respectively.

Each print roll 47 is powered from shaft 31 through a suitable gear

train comprising gears

37, 38 and 4G on

shafts

31, 29 and 55 respectively.- Ink retaining and transfer pads and'rolls 45, 43 and 42, supply ink to the print'roll and are driven from the shaft 31 through the pulley arrangement 54.

Wheels 61 and respective handles 62 at the sides of the conveyor 264) are mounted on shaft 63 to permit adjustment of the print table 49 and print rolls 47 so that proper print registration is secured on each box.

Referring to FIG. 4, it will be seen that the wheels 62 are mounted at the ends of shaft 63 which connects by means of

gears

64 and 65 to the threaded shaft 72. Shaft 72 is journalled at 73 in a suitable bracket or cross member, and i-t is rotated by movement of shaft 63 and wheels 61. Threaded member '71 on shaft 72 then moves either in one direction or the other along shaft 72 depending on the direction of ymovement of shaft 63. The movement of member 71 is translated through member 69 to either apply or increase the pressure on collars 69 or springs 70 and the nuts 70 which restrain the respective springs 74) upon respective rods 63. Each rod 68 is pinned to or engaged with a respective one of the print rollV support tables 49 at 74. Collars 69 vor nuts 70 respond to the degree of pressure placed thereon by member 69 and rotate the table 49 accordingly through rods 68. Thus, if member 71 is moved in any direction along shaft 72, it pivots the respective tables 49 in a corresponding direction.

The pivoting of the print table 49 on shaft 31 changes the relative position of the type face on the corresponding print roll ,47 with respect to the box side. Therefore, when each print table 49 is rotated, adjustment gear 3S is rotated correspondingly and it transmits its motion through the gear 44) to the associated print roll 47 to rotate that roll to a corresponding position. This ensures that the initial portion of its type face 56 will rst engage the box side. Thus, the position of the rolls 47 vwith respect to the box width is adjusted, while the position in which the print is registered on the box is properly maintained. The springs 70 serveto absorb the shock of contact between the boxes and print rollers.

In practice, a box 100, for example, after having been packed yand sealed is automatically carried forward by chains With its longitudinal axis aligned midway between chains 8 andV 9. Y As chains 8 and 9 move in an endless belt around sprockets 6 and 23, they frictional'ly carry the box forward until it engages the chains 8 and 9. The chains 8 and 9 are wider than the chains 7 to provide suitable support for the box and in addition are further above the table top 3 than chains 7 so that each box is effectively disengaged from chains V7 on being engaged by chains 8 and 9.V The chains 8 and 9 are displaced somewhat to one side with respect to the sides of conveyor 29) for the purpose of allowing long boxes to swivelor rotate without excessive displacement beyond the sides of conveyor 201. As pointed lout above the box is initially guided with respect to theirl position.

Asthe chain 8, for example, rotates at twice the speed of chain 9, it frictionally carries its associated side of the box forward at much faster speed than the other, wherefore the box pivots or rotates a full 90 by the time it is at the end of chains S and 9. If needed for such reason as. the undue box Klength, a rotation flange or projection 11 is provided, as before explained, for engaging a corner of the box to hold that corner while Y the other side is carried forward by chain 8 to initiate Ysystem is rendered exceedingly flexible.

Y As the box is brought'to the end of chains l5l and 9, it

is again carried forward under engagement withchains 7.

Brackets

15 and 18 which are especially useful for short boxes are shaped and adjusted as needed to suitably guide the box into symmetrical disposition with respeot to ithe sides 201 of `conveyor 200, while as may be easily seen, a box engaging either bracket has one side brought flat against that bracket and is therefore prevented from turning more than at the time it is fully engaged by chains 7 and adjacent the portion of bracket 18 that is parallel to the conveyor route. VAdditionally bracket 18 serves to displace each box toward the center of the conveyor route so that it is properly disposed with respect to the print rollersV 47. Brackets not shown may also be disposed along any of the other chains to ensure that the box alignment is maintained. v

The box lis carried forward under the influence of chains 7 until it encounters the synchronizing stops 85, which are located between

shafts

19 and 24. Now as shaft 19 rotates, it controls the cam 82V as previously explained and that cam permits follower arm S3 to drop so that stop 85 also falls below the bottom Vof the box. This permits the Vbox to again be carried forwardly by chain 7 in synchronism with the position lugs 35 and the print rolls 47.

The box now is engaged by wheels 25, and given'a slight forward and upward tilt and then tips forward as Shown for box 102a to allow stops 85 to engage the next box which may have been in `abutment Vwith box lili-a.

The box is engaged by lugs 35 as shown for box 162i) carried by chains 36 either after engagement by wheels 25 or after engagement by plate 10S and positively brought to a position indicated by box 103 in engagement with the type face 56 on print rolls 47. The dropping of the stop $5 and movement of the box is of course timed with the arrival of lugs 35 `at a certain position so that the box position in synchronized with the print rolls 47. The velocity or speed of movement is controlled to maintain the synchronized position during the passage of box 163 through stage 2. The box therefore is carried between print rolls 47 which register the print thereon and it is thereafter carried to a position indicated by box 164, whereafter it may again be rotated as by stage 190 or its movement otherwise controlled,

as desired. y Y j It will be observed that stage 190 comprises a pair of

chains

192 and 194 which are constructed and operated,

in a manner similar to chains 8 land 9, and that they are displaced toward one side of the center of the conveyor 194 and at the end `of chains 176. It is adjusted and positioned by means of Varms 198 to displace 104 in alignment with

chains

192 and 194.

The box 104 approaching the

chains

192 and 194 is often arranged with its 'long axis parallel to the direction of movement of

chains

192 and 194. This may result in the box indicated by being rotated insuiciently in the provided chain length. Therefore yan adjustable bracket 188 having a projection 189 is positioned adjacent chainy 194 to and .in turning the box vas described forV bracket 10, so thatthe box is Yfully turned'as shown at 106 for further operation. Y

Thus, having described one embodiment of my inven-V tion with respect to a box rotator and printing arrangement for use in a conveyor system, butV realizing the `application of my invention to other types of Yarticles and in other types ofV conveying or processing systems, I Vam appending hereto a series of claims commensuratewith the breadth of the invention. Y Y

What is claimed is:

41. In a conveying system of the type wherein a plural- Y j, f ity of cartons are successively received and movedwith Y one axis parallel to the direction of Vmovement and upon each of which an operation is to be performed succesthe box j sively at -a predetermined position thereon parallel to an axis perpendicular to said one axis, the improvement comprising a pair of belts displaced with respect to the longitudinal axis of said system and arranged to engage respective bottom portions of each carton While moving at different speeds whereby each carton is successively rotated, and means for restraining the extent of said rotation while said carton is so engaged whereby said one axis is placed perpendicular to the direction of said movement and said perpendicular axis is placed parallel to the direction fof movement, said means arranged to displace said perpendicular axis substantially in coincidence with said longitudinal axis while each carton is conveyed in said one direction, 4the length of said carton along said one parallel axis `being greater than a predetermined dimension, and means adjacent one belt for restraining a corner of each carton as it approaches the end of said 'belt whereby the other belt will rotate said carton around said restrained corner to cause release of said restrained corner.

2. In a conveying system of the type wherein a plurality of cartons are successively received and moved at high speed with one axis parallel to the direction of movement and upon which an operation is to be .performed at a predetermined position parallel fto an axis perpendicular to s-aid one axis, the improvement comprising means for moving respective portions of said carton at diierent relative speeds whereby said one axis is placed perpendicular to the direction of said movement and said perpendicular axis is placed parallel to the direction of movement, a cam operated single stop for thereafter terminating said movement by engaging the front side of each carton in succession and for disengagng said iront side in timed relationship with certain moving apparatus, means for moving each carton after disengagement of said stop therefrom in synchronism with said apparatus whereby said operation 4is performed at said predetermined position parallel to said perpendicular axis, and Y means for rotating each carton about a horizontal axis on disengagement from said stop to permit a succeeding carton to be engaged by said stop.

3. In a conveying system of -the type wherein a plurality of cartons are successively received and moved at high speed with one axis parallel to the direction of movement and upon which an operation is to be performed along another axis displaced from said one axis, and wherein said cartons may be of different linear dimension along said one axis, the improvement comprising a pair of endless lbelts of respective predetermined lengths for engaging respective portions of each carton, means for moving each belt at different relative speeds whereby said one axis of each engaged carton is placed at an angle to the direction of said movement and said other axis is placed parallel to the direction of said movement said belts arranged to engage each carton for a predetermined distance, `and last means operative While said carton is so engaged for ensuring that the one axis of each carton is placed at said angle despite the linear dimension of the engaged carton along said one axis with respect to said predetermined distance.

4. The arrangement claimed in claim 3 in which one of said `belts is movedat twice the velocity of the other for rotating a carton substantially whose one axis is approximately 50% lof said predetermined distance.

5. The arrangement claimed in claim 3 in which said last means comprises a pair of ibrackets disposed at an angle to `said direction of and adjacent the end of said predetermined distance to ensure that cartons whose one axis is shorter than a predetermined value are not rotated beyond a predetermined degree on being disengaged from said belts.

6. The arrangement claimed in claim 3 in which said last means `comprises 'a bracket disposed adjacent the end of said predetermined distance for engaging one corner of a carton While moved by said belts to ensure that a carton Whose one axis longer than a predetermined value is rotated to a predetermined `degree in said distance.

7. I-n a conveying system of the type wherein a plurality of cartons is received dor successive movement of said cartons at high speed along a conveyor route and in which said cartons may be of different lengths and the sides of said cartons perpendicular to the direction of movement are to have printing registered thereon at a predetermined stat-ion along the length of said conveyor route, the improvement comprising a pair of dilerentially driven belts `for engaging each carton in succession and for moving each carton along said route while rotating each carton, a single stop normally positioned for engaging each carton after its rotation to terminate its movement and momentary reciprocable for permitting an engaged carton thereafter to be moved, and means for conveying each released carton thereafter along said route while pivoting the released carton about an axis perpendicular to said route to permit said stop to be reciprocated for engaging a carton in substantial abutment with the released carton.

8. In the system claimed in claim 7 in which said pivoting -means comprise a rotating wheel WhoseV periphery lies adjacent said stop for engaging each carton immediately after its release, and there is a lug moving at a rate and in a position synchronized with said moving apparatus and arranged to pass around the axis of rotation of said wheel for engaging the back of each carton pivoted by said wheel lbefore the released carton can be carried into engagement with said moving apparatus.

References Cited in the le of this patent UNITED STATES PATENTS 1,616,101 Ackley Feb. 1, 1927 2,664,816 Gibson Jan. 5, 1954 2,776,038 Caldwell Jan. 1, 1957 2,805,753 Palmer Sept. l0, 1957 2,911,091 Imse Nov. 3, 1959