US 2274075 A
Description (OCR text may contain errors)
Feb. 24, 1942. L 5, LA BOMBARD 2,274,075
DELIVER! MACHINE FOR BLANKS AND THE LIKE Filed May 5, 1939 4 Sheets-Sheet l Lara E lafiombard I NV EN TOR.
A TTORNE Y.
L. E. LA BOMBARD 2,274,075
DELIVERY MACHINE FOR BLANKS AND THE LIKE Filed May 5, 1959 4 Sheets-Sheet 2 Feb. 24, 1942.
L n E.La5om [pa/ i INVENTOR ATTORNEY DELIVERY MACHINE FOR BLANK S AND THE LIKE Filed May 3, 1939 4 Sheets-Sheet 3 L 60/2 Z. L aBamZmrd' INVENTOR ATTORNEY Feb. 24, 1942 LA BOMBARD 2,274,075
DELIVERY MACHINE FOR BLANKS AND THE LIKE Filed May 3, 1939 4 Sheets-Sheet 4 Leon 5 Ldfiomara INVENTOR ATTORNEY Patented Feb. 24, 1-942 DELIVERY MACHINE FOR BLANKS AND THE LIKE LeonE, La Bombard, Nashua, N. 11., assignor to The International Paper Box Machine Company, Nashua, N. 11., a corporation of New Hampshire Application May 3, 1939, Serial No. 271,479
This invention relates to delivery machines for blanks and the like and more particularly to machines of the type commonly known'a", stackers.
In paper converting machines for carrying out operations such as folding, gluing and the like on paperboard blanks, it is often desired to assemble individual blanks into an overlapping series or stack. While such blanks often comprise plain unfolded paperboard sheets, more often the blanks are provided with cuts, tabs, openings, flaps, folds or other constructional features which require special precautions in stacking to prevent jamming, improper stacking, or damage to the blanks. In order to prevent such occurrences, it is desirable in certaincases to deliver succeeding blanks under the preceding blanks or understack.
The blanks which are to be stacked often have been folded or glued and it is desirable that the folded portions of the blank be firmly pressed together before the blanks are placed in stacked relation. Furthermore, the blanks often have been printed and it is necessary to observe certain precautions to prevent marring of the blanks.
In accordance with an illustrative embodiment of the present invention, the blanks are advanced in non-overlapped or individualized relation by a relatively fast-moving, feeding conveyor of suitable construction including, for example, cooperating belts, and are delivered to a relatively slow-moving, receiving conveyor of suitable construction upon which the blanks are arranged in overlapped or stacked relation. Between the conveyors is provided a guide roll which serves both to support the rearward end of the stack and to direct the leading edge of each succeeding blank under the trailing edge of the blank preceding it, without substantial friction. Preferably, the guide roll is rotated at the surface speed of the blank which is in contact therewith in order to facilitate stacking and to prevent marring the blank, particularly where the blank has been printed. Also disposed between the conveyors is one or more pairs of breaker rolls which firmly press together any folded portions and prevent such folded portions from opening when the blanks have been delivered onto the receiving conveyor.
The several portions of the apparatus are adjustable in order to permit a wide range of adjustment so that the machine iscapable of operating upon blanks of wide variation in lengths and also is capable of stacking the blanks with widely varying degrees of overlap.
An object of the present invention is the provision of a simple and effective stacker for under stacking blanks, which is capable of adjustment for stacking blanks of widely varying sizes and with varying degrees of lap.
Still another object of the invention is the provision of a stacker capable of exerting positive control over the movement of the blanks without marring or damaging the blanks.
Still another object of the invention is the provision of a stacker capable of exerting a concentrated, adjustable pressure upon the blanks for the purpose of compressing any folded'portions thereof prior to delivery into stacked condition.
Various other features and advantages of the invention will be apparent .from the following particular description and from an inspection of the accompanying drawings.
Although the novel features which are believed to be characteristic of this invention will be particularly pointed out in the claims appended hereto, the invention itself, as to its objects and advantages, and the manner in which it may be carried out, may be better understood by referring to the following description taken in connection with the accompanying drawings forming a part hereof, in which Fig. 1 is a fragmentary, longitudinal sectional view, partially diagrammatic, of the principal portions of a stacker constructed in accordance with the present invention} Fig. 2 is an enlarged fragmentary perspective view of a portion of the stacker shown in'Fig. l and illustrating particularly the delivery of the blanks from the faster moving conveyor to the slower moving conveyor;
Fig. 3 is a fragmentary perspective view of a detail of construction;
Fig. 4 is a fragmentary sectional view illustrating particularly the driving means for the delivery mechanism;
Fig. 5 is a fragmentary sectional viewillus trating the arrangement of the-rolls forming a portion of the delivery mechanism;
Fig. 6 is a fragmentary and somewhat dia- 2 grammatic view illustrating a constructional detail; and
Figs. 7. 8 and 9 are fragmentary cross-sectional views, partially diagrammatic, illustrating the operation of the machine in three different positions of adjustment respectively.
In the following description and in' the claims, various details will be identified by specific names for convenience, but they are intended to be as generic in their application as the art will permit. Like reference characters denote like parts in the several figures of the drawings.
Referring now particularly to Fig. l, the stacker comprises a feeding conveyor a delivery mechanism 2, and a receiving conveyor 3. Inasmuch as the feeding conveyor. I may be of any suitable construction, except for the portions adjacent the delivery mechanism, only the latter portion of this conveyor is illustrated.
The feeding conveyor I (Figs. 1 and 2) preferably comprises cooperating belts 5 and 6 and preferably these members each are constituted by a plurality of spaced and generally parallel belts, as illustrated particularly in Fig. 2. The lower belts 5 are trained over pulleys 1 carried on a shaft 8 journaled in a suitable frame 9.
The upper belts 6 are similarly trained over pulleys I!) carried on a shaft II but this shaft is journaled in floating bearings l2 (one of which is illustrated). The floating bearings l2 are supported for limited vertical movement on posts l3 and are urged downwardly by springs |4 bearing against adjustable stops |5. The upper pulleys l0, therefore, are spring pressed downwardly to urge the upper belts 6 into contact with the lower belts 5 but are permitted to ride upwardly to allow the passage of blanks.
Disposed adjacent the delivery end of the feeding conveyor l are a plurality of pairs of pressure or breaker rolls, 20, 30, 2|, 3|, the purpose of which will hereinafter appear. While only a single pair of such rolls may be used, it is usually preferable to provide at least two such pairs. The lower breaker rolls 20 and 2| are provided with journal portions 22 and 23 mounted in fixed bearings 24, 25.
At this point it should be noted that, whereas the various rolls herein disclosed are described as having journal portions, such rolls may be constituted by suitable roll portions carried on separate shafts or by rolls having separate journal portions secured thereto.
The lower breaker rolls 20 and 2| carry gears 26 and 21 (see Fig. 4) which mesh with an intermediate gear 28 for driving the rolls 20, 2| as hereinafter described.
The upper breaker rolls 30 and 3| are provided with journal portions 32 and 33 mounted in floating bearings 34 and 35, and carry gears 36 and 31 which mesh respectively with gears 26 and 21, whereby all of the breaker rolls are driven at the same peripheral speed.
The gear train for the breaker rolls is driven from a gear I6 carried on a shaft 8 and through an intermediate gear |1 carried on a shaft l8, which gear |1 meshes with the gear 26. A gear |6a is provided which meshes with the gear I6 so that the pulleys 1 and HI are driven at the same speed.
A driving motor I9 is provided and is connected by a suitable drive, such as a belt 29, to a driving pulley 39 fixed on the shaft8. Thus the driving motor i9 is operative to drive the faster moving conveyor and all of the breaker rolls.
Mounted adjacent the forward pair of breaker rolls 2| and 3| are delivery rolls 40 and preferably of somewhat less diameter than the breaker rolls. The delivery roll 40 has journal portions 4| mounted in suitable bearings (not shown) carried by the frame 9 and carries a gear 42 driven from the gear 21 by an intermediate gear 43 carried on a shaft 44. The upper delivery roll 45 is provided with journal portions 41 supported in floating bearings 45a (see Fig. 3) and carries a gear 46 meshing with the gear 42 and driven thereby.
It will be noted that the gear train illustrated particularly in Fig. 2 is such that the surface or peripheral speed of all of the rolls 20, 30, 2|, 3|, 40 and 45 is the same. Also, the surface or peripheral speed of these rolls is substantially equal to the speed of the conveyor belts 5 and 6.
A third delivery roll (hereinafter designated as the terminal delivery roll" or "transfer roll") is disposed rearwardly of the delivery rolls 46 and 45 and is provided with a journal portion 6| journalled in brackets 62, adjustably mounted on a plurality of racks 63 (see Figs. 2 and 5). Each of. the racks 63 is carried by a bracket 64 having a bearing portion 65 mounted on the corresponding journal portion 4| of the roll 40. The bracket 64 is provided with an arm portion 66, which is held in position by aset screw 61, whereby the angular position of the bracket 64 about the journal 4| can be adjusted and the bracket fixed in any one of a number of different angular positions.
A pinion 68, which meshes with the rack 63, is carried on a shaft 69 journalled in the bracket 62. The shaft 69 carries a sprocket 10 over which is trained a sprocket chain 1| which also is trained at its upper end over a sprocket 12 carried on a shaft 13. The shaft 13 connects the sprocket chains at the two sides of the machine for simultaneous operation and a handle 14 is provided for rotating the shaft 13.
It will be seen from the foregoing that the structure just described provides for both vertical and horizontal adjustment of the terminal delivery roll 60. The terminal delivery roll 60 can be swung about the axis of rotation of the lowerdelivery roll 40, by suitable angular ad-- justment of the along the rack handle 14. By
bracket 64 and can be adjusted 63 by suitable actuation of the employing one or both of these adjustments, any desired vertical or horizontal adjustment can be made throughout the limits imposed by the construction of the machine.
The terminal delivery roll 60 is driven from the shaft 8 by a drive mechanism 9| comprising a pulley 8| mounted on the shaft 8, and a belt 82 trained around the pulley 8| and around a pulley 88 carried on the journal portion 6| of the roll 66. Suitable driving tension is maintained on the belt 8| by a tension device 92 which includes pulleys 83 and 84 rotatably carried at the ends of an arm 85 which is pivoted on a shaft 81 supported by a bracket 86. A coil spring 88 has one vend operatively connected to a fixed collar 89 and the other end operatively connected'to the arm 85 for rocking the rection (as viewed in Fig. l). The purpose and operation of the tension device is explained more fully hereinafter.
The receiving conveyor 3 is disposed adjacent the delivery mechanism 2 and comprises a lower latter in a clockwise dimounted on the frame 9. Fixedly connected to.
the post I04 is a pinion I09 meshing with a helical gear IIO carried on a shaft III extending through a bracket II2 which is rigid with the post, I04. The shaft III extends to a similar jack mechanism (not shown) at the other side of the machine, and is provided with a handle II3 for turning the same. The jack mechanism is pivoted about the shaft I01 and the bearing I03 can be elevated or depressed by means of the jack mechanism.
The upper run of the. lower belt I is supported by a table II5 carried on a pair of side rails II 6, H6 which extend forwardly to and are pivotally mounted on a cross member III supported by a frame H8. The side rails H6, H6 and the members which connect them form a rigid support adapted to pivot as a unit about the cross member In. The lower belt I00 is trained around aforward roll I carried on a shaft I2I., and idler rolls I22 and I23, carried on shafts I24 and I25, respectively, are provided for tensioning the lower belt I00.
A suitable upper pressure unit 99 is provided and is disposed in cooperative relation with the lower belt I00. The pressure unit includes a plurality of belts I29, respectively, trained around pulleys I carried on a shaft I3I extending between side members I32 which are pivotally supported on a shaft I33 mounted in side frames I34. The side frames I34 are slidably mounted on the .side rails II6 by rollers I36 mounted on stud shafts I attached to the side frames I34.
At their forward ends, the upper belts I29 are trained around pulleys I40 rotatably carried by frames I43. The frames I43 are pivoted at their rearward ends about a shaft I46 journaled in and connecting upstanding arm portions I49 of the side members I32, and are free to float at their forward ends. In order to suspend the forward ends of the frame I43 when it is desired to adjust them laterally, they are pivotally connected -at I44 to a link I which in turn is pivotally rollers I50 (only some of which are shown) which bear-against the upper surface of the lower run of the corresponding upper belt I29 and serve to press the belt into cooperative relation with the lower belt I00, as will be more fully explained hereinafter. Each roller I50 is mounted on a stud I5I carried by a weight I52 vertically slidable with respect to the frame member I43. For the purpose of guiding the weights I52, each of the weights is provided with a way I53 which is received over a guide stud I54 fixed on the frame member I43.
From'the foregoing, it will be seen that the frames I49 are free to rock about the pivot I33, to permit the belts I29 to ride upwardly when blanks are inserted between the belts I29 and the belt I00. Since the frames I43 are free to;
shafts I4 I journaled in brackets I42 carried on ently capable of vertical movement. Thus, the pressure unit 99 will permit the passage of blanks and will apply pressure thereto to maintain the blanks in properly stacked condition.
The belts I29 and belt I00 of the receiving conveyor 3 are suitably driven as by a motor I60 connected to a variable speed device I600 which drives a chain I6I trained over a sprocket I62 carried on a shaft I63; A pinion I64 is carried on a shaft I63 and meshes with a gear I65 carried on the\ shaft I2I. .,A chain I66 is trained around a sprocket (not shown) carried on the shaft I2I and around a sprocket I61 carried on a shaft I68 supported by the side rails H6. The
chain I66 is also trained around one portion of a double sprocket I68 carried on the shaft I33 and around an idler sprocket I69 carried on a shaft I10 journaled in the side members I34, which sprocket I69 maintains the chain I66 in driving engagement with the sprocket I68. Trained around the other portion of the double sprocket I66 is a chain III which is also trained around a sprocket (not shown) secured to the shaft I3I.
From the foregoing it will be. seen that upon energization of the motor I60, the gear I65 is driven and rotates the shaft I21 and to effect traveling movement of the lower belt I00. At the same time the chain I66 drives the sprocket I68 to cause the chain III to drive the shaft I3I. This effects traveling movement of the upper belts I29. The various members are so designed and connected that both upper and lower belts of the slower moving conveyor 3 are driven at the same surface speed.
At this point it should be noted that the drive (not shown) for the feeding conveyor I and the drive for the receiving conveyor 3, are each independently adjustable so that not only is it possible to adjust the speed passage of the blanks through the machine, but also the relative speeds of the conveyors can be changed as desired.
The structure illustrated in Fig. 1 and shown diagrammatically in Figs. '7, 8 and 9, can be adjusted to operate upon blanks of various lengths and to provide a greater or lesser amount of lap between adjacent blanks, so as to provide either a close stack or an open stack, as may be desired. These adjustments can be accomplished by suitable positioning of the terminal delivery roll 60 which is adjustable both vertically and horizontally or adjustment of the end of the lower belt I00, which is also adjustable vertically or horizontally, or by adjustment of the speed of it is desirable that the roll 60 be adjusted to a position relatively close to the roll 40.
Certain different conditions of adjustment are illustrated diagrammatically in Figs. 7, 8 and 9 respectively. In Fig. 7 it will be noted that the top of the terminal delivery roll 60 is substantially level with the line of travel of the blanks through the breaker rolls and the upper run of the lower belt I00 is substantially below this level float at their forward ends, they tend to'maintain the upper belts I29 against the lower belt The operation of the stacker adjusted as illustrated in Fig. 7, is as follows::
Blanks b are fed successively, in spaced out condition, to the feeding conveyor I at the rear end of the machine and are advanced by the cooperating belts 5 and 6. The blanks b are Wpelivered successively to thepaired breaker rolls 20, 30, 2| and 3| and pass between these rolls. Owing to the resilient pressure exerted upon the upper rolls and 3| the blank b is squeezed between the rolls and the folded, or glued and folded portions are pressed together and the possibility of the blanks opening or unfolding after they pass from the delivery mechanism thereby is minimized.
The leading blank then passes through the delivery rolls 40 and and is supported by the terminal delivery roll 60 until the trailing end is discharged from between the delivery rolls v and 45. The blank b then rocks downwardly and the leading edge is deposited on thesupporting surface provided by the projecting portion of the lower apron I00, the trailing end of the blank being supported by the roll 60 so that the blank b is disposed in tilted position.
Owing to the relatively slower rate of travel of the belt I00, the lower end of the blank b is advanced slowly and a succeeding blank b is advanced through the breaker rolls 20, 30, 2| and- 3| and delivery rolls 40 and 45 before the trailing end of the preceding blankis carried off the terminal delivery roll 60. The leading end of the succeeding blank is then inserted between v the roll 60 and the trailing end of the preceding blank and is advanced into a position partially underlying the preceding blank until the leading end of the second blank rests upon the apron I00. The second blank thus serves to support the trailing end of the preceding blank and is itself supported by the roll 60 until a third blank is advanced and inserted under the second blank.
This operation is repeated and the leading blanks are advanced slowly by the belt I00 until the leading edge of the foremost blank enters the nip of the belts I00 and I29. Since these belts are traveling at substantially the same speed, the blanks b are advanced in the grip of these belts and remain in the lapped or stacked condition.
The tension device 92 which tensions the driving belt 82 for the terminal delivery roll 60 is adjusted to apply a predetermined tension on the belt 82. This tension is so selected that the surface speed of the delivery roll 60 is the same as the surface speed of that blank in contact withthis roll. Thus, when a blank b is advanced by the delivery rolls 40 and 45 the roll 60 is rotated at the surface speed of this blank, and hence, the blank b is assisted into the nip formed between the terminal delivery roll 60 and the preceding blank which bears upon the roll 60 (as illustrated in Fig. 7).
Immediately after the blank has been inserted between the .roll 60 and the preceding blank, and has been advanced free of the rolls 40and 45, the stack of blanks and the lower belt I00 of the receiving conveyor 3 bear upon the roll 00 with sufiicient force to cause the belt 82 to slip on the driving pulley 80 and thus the roll 00 attains a surface speed of the advancing stack of blanks.
From the foregoing, it will be seen that the roll 60 is rotated slowly and at the surface speed of the stacker blanks when the rearmost blank of the stack is in direct contact with the roll .50. On the other hand, when the blank which is under the influence of the delivery rolls 40 and 45, is being advanced in contact with the roll at the surface speed of the delivery rolls,
. as well as folded the roll is rotated at the surface speed of the last mentioned blank.
Thus, the blanks are deposited at the rear of the stack with little friction. Also, the possibility of marring the blank by reason of relative movement between the roll and blank is substantially eliminated.
It will be noted that, as the stack of blanks enters the nip between the belts I00 and I29, the rearward ends of the belts I29 are permitted to rock upwardly to permit entry of the stack of blanks. The stacked blanks are carried along between the belts I 00 and I29 and the blanks, portions thereof, are pressed firmly together by the action of the weighted rollers I50.
The blanks are advanced from between the upper and lower belt of the receiving conveyor 3 and are discharged therefrom in any suitable manner and collected in lapped condition or they may be collected by a similar accumulator (not shown) in fully lapped condition in the form of a straight pile or stack.
As stated hereinbefore, the apparatus is capable of adjustment for operating upon blanks of various lengths and for stacking the blanks with varying degrees of overlap. In Fig.8, the apparatus is illustrated as adjusted for stacking blanks which are somewhat shorter than the blanks shown in Fig. 7, and the blanks are stacked with somewhat greater overlap. It will be noted that the terminal delivery roll 60 is elevated somewhat above the level of feed of the feeding conveyor and that this roll is disposed somewhat closer to the belt I00. Also, the receiving conveyor 3 is operated at a somewhat slower speed relative to the feeding conveyor. It will be noted; therefore, that the blanks are stacked at a somewhat more obtuse angle than the blanks illustrated in Fig.
Referring now particularly to Fig. 9, it will be seen that the apparatus is adjusted to stack longer blanks with a substantially lesser degree of overlap. In the position of adjustment illustrated in Fig. '9, the lower belt I00 is elevated so that it is substantially on a level with the feeding level of the blanks through the receiving conveyor I. The terminal delivery roll 60 is also disposed at such a level that its upper surface is substantially at the same level as the upper run of the lower belt I00. It will be seen that, in this particular adjustment of the apparatus, the terminal delivery roll 60 does not serve to support the rearward end of the last blank of the stack, but serves merely to guide the leading end of the preceding blank in position between the last blank of the stack and the lower belt I00.
Various other adjustments may be made as will be apparent to those skilled in the art in order to permit the machine to handle blanks of various lengths and to stack the blanks with difi'erent degrees of overlap.
In making certain of the adjustments herein described, it is necessary to adjust the position of the terminal delivery roll 60. As previously explained, the roll 60 is journaled in brackets 62 which are adjustable in a fore-and-aft direction on the racks 63 by manipulation of the handle I4. The racks 63 are in turn pivotally carried on the journals 4I. Thus, the roll 60 can be adjusted forwardly or rearwardly and can be adjusted angularly about the journals M as a pivot. The employment of the drive mechanism 9I renders, it possible to make these adjustments and the only adjustment necessary on the drive mechanism is the adjustment of the tension applied to the belt 82 by the tension device 92.
In handling certain classes of work, it is necessary to apply somewhat more friction on the blanks than is obtainable from the use of polished metal rolls. In such cases, it is usually desirable to substitute rubber covered rolls for.
either theroll B or the roll 40 or both. Thus, a somewhat higher friction is applied to the blanks by the delivery mechanism and it is possible to overcome any friction tending to oppose the entry of the blanks between the stack and the terminal delivery roll 60.
It will be understood that the belts and 6 of the feeding conveyor I and their pulleys l and I0 and the upper belts I29 of the receiving conveyor 3, as well as the associated pulleys I30 and H0 and roller-carrying frames I43 can be laterally adjusted to accommodate blanks of various s1zes.
From the foregoing, it will be seen that the present invention provides a stacker mechanism which is relatively simple in construction, which is reliablein operation and which is capable of understacking without jamming or injury to the blanks.
While certain novel features of the invention have been disclosed herein, and are pointed out in the annexed claims, it will be understood that various omissions, substitutions and changes may be made by those skilled in the art without departing from the spirit of the invention.
What is claimed is:
1. A stacker for blanks and the like comprising, a first conveyor for advancing blanks in spaced relation, a slower moving second conveyor for receiving blanks from said first conveyor, and means between said conveyors for inserting the leading edge of each succeeding blank under the trailing edge of the preceding blank, said last means including a transfer roll adapted to engage a blank passing from the first conveyor to the second conveyor, and means active during engagement of the blank with said conveyors respectively for driving said roll at a speed corresponding to the speed of the conveyor with which the blank is in engagement.
2. A stacker for blanks and the like comprising, a feeding conveyor, a slower movingv receiving conveyor, a surface disposed between said conveyors for guiding blanks onto said second conveyor, and means active during engagement between said surface and a blank traveling under the influence of said feeding conveyor for driving said surface at the speed of said feeding conveyor and active when said blank is traveling under the influence of said receiving conveyor for driving said surface at the speed of said receiving conveyor.
- a support mounting said bracket for translationa1 adjustment, means mounting said support for angular adjustment, and means for driving said roll.
4. Apparatus for feeding blanks and the like comprising, a relatively fast moving first'con= veyor for advancing blanks in spaced relation, a relatively slow moving second conveyor for receiving blanks from said first conveyor, and means between said conveyors for inserting the leading end of each blank under the trailing end of the preceding blank, said last means including a moving surface adapted to engage a blank passing between the conveyors, and means including a friction drive for driving said surface substantially at the speed of the respective conveyor with which the blank is engaged.
5. A stacker for blanks and the like comprising, a feeding conveyor for advancing blanks in spaced out relation, a receiving conveyor for receiving blanks from said feeding conveyor, and means driven approximately at the speed of said first conveyor for guiding said blanks into stacked relation on said receiving conveyor and retarded during engagement of a blank simultaneously with said last means and said receiving conveyor.
6. A stacker for blanks and the like comprising, a feeding conveyor for advancing blanks in spaced out relation, a receiving conveyor for receiving blanks from said feeding conveyor, and means intermediate said conveyors and frictionally synchronized with one of said conveyors for guiding said blanks into lapped relation on said receiving conveyor,
7. A stacker for blanks and the like including, a first conveyor adapted to feed blanks in nonoverlapped relation, a second and slower moving conveyor for feeding blanks in overlapped relation, and means for guiding blanks from said first conveyor to said second conveyor including a roll, and slippable drive means for said roll active to drive said roll normally at the speed of said first conveyor and adapted to slip when a blank engaged with said roll is engaged by said second conveyor and to drive said roll at a slower than normal speed.
8. Apparatus for stacking blanks and the like comprising a rigidly mounted, relatively fast moving first conveyor, a transfer roll mounted for vertical and horizontal adjustment adjacent the delivery end of said first conveyor, and a relatively slow moving second conveyor having its discharge end rigidly mounted, and means including a pivotally mounted Jack for adiustably supporting the receiving end of said second conveyor.
9. Apparatus for stacking paperboardbianks and the like comprising a relatively fast moving feeding conveyor and a relatively slow moving receiving conveyor for receiving blanks from said feeding conveyor, means for vertically adjusting the receiving end of said receiving conveyor, and means between said conveyors for inserting the the leading edge of each succeeding blank under the trailing edge of the preceding blank, said last means including a transfer roll adapted to engage and support a blank' passing from the feeding conveyor to the receiving conveyor, means for driving said transfer roll, and means mounting said transfer roll for vertical and horizontal adjustment.
LEON E. LA BOMBARD.