US1908823A - Container forming machine - Google Patents

Description

May -16, 1933.

yF. H. DANIELL CONTAINER FORMING MACHINE Filed Nov. 28. 1930 5 Sheets-Sheet 1 May 16, 1.933. F. H. DANIELI. 1,908,823

CONTAINER FORMING MACHINE Filed Nov. 28. 1930 5 sheets-sheet 2 May 16, @.93-3. F. H, DANIELL 1,908,823

CONTAINER FORMING MACHINE Filed NOV. 28, 1950 5 Sheets-Sheet 3 May 16, 1933. F. H. DANN-:LL

CONTAINER FORMING MACHINE 5 Sheets-Sheet 4 Filed Nov.

/% ima/4m May 16, 1933. F, H DANIELL i 1,908,823

CONTAINER FORMING MACHINE B www Y?" Patented May Y1e, 1933 FRANCIS HAROLD DANIELL, F GLEN IRIS. VICTORIA, AUSTRALIA CONTAINER FORMING MACHINE Application led November 28, 1930, Serial No. 498,877, and in Australia December 11, 1929.

This invention relates to improvements in container forming machines and refers especially to machines for forming metal foil containers adapted for the packing of pasteurized cheese and the like.

It has previously been proposed to employ a machine having a reciprocating internal die adapted .to pass shaped blanks of metal foil between opposed pairs of brushing elements whereby the projecting sides and ends of the blank are turned against the sides and ends of the dies.

In this machine laterally movable fingers were arranged 'between the pairs ,of opposed brushes to tuck in the corners of the blank prior to passing same between the second pair of brushes.

The objects of the present invention are to provide improvements in machines of the abovementioned type whereby inter alia the foil may be fed from a spool direct to the machine, thereby dispensingwith the intermittently movable conveyor previously provided for this purpose, and obviating. the ne- 5 cessity desired shape.

of previously cutting the blanks yto a A further object of the invention is to provide improved means for folding the corner pieces or gussets of the wrappers or containers neatly against the internal die.

The invention brieiiy consists in the provision of intermittently operable feed rollers adapted to project a web of material into position below a reciprocable internal die,

means for supportingthe blanks below the die,

in position means for severing the blanks from the web, and brushing elements and tuckiug devices portions of the blanks 'against the ends of the die.

adapted to fold projecting sides and placing same in have been lled.

position after the wrappers In the drawings', which illustrate preferred forms of the invention:

Figure 1 is a view in elevation of a machine for forming the body portion of the container and placing same in open-cartons.

Figure 2 is a` view in elevation of a machine for cutting the top portion of the container and placing same in position.

igure 3 is a view in sectional side elevation taken on the line 3 3 of Figure 1. 60

Figure 4 is a view in sectional plan taken on the line 4 4 of Figure 3.

Figure 5 is a view in elevation partly in section of feed rollers and is taken on the line 5-*5 ofjFigure 3.

Figure 6 is a view in side elevation looking from the left of Figure 1.

Figure 7 is a view in section of a control valve. y

Figure 8 is a view in elevation of portion 70 of the ratchet mechanism for the feed rollers.

Figure 9 is a vview in perspective showing the feeding and cutting-olf mechanism for the web of metal foil.

Figures 10 to 13 inclusive are, views in per- 75 spective illustrating successive stages in the formation of the container. l

Figure 14 is a cross sectional view of the in'-v ternal die. j

Figure 15 is a view in sectional side ele- 80 vationv taken approximately on the hne 15-15 of Figure 2.

Figure 16 is a view in elevation looking from the left of Figure 15, parts being removed for convenience of illustratio Figure 17 is a view in plan of the unit shown in Figure 15.

Figure 18 is a cross sectional view of the apparatus shown in Figures 15 and 16.

Figure 19 is a view in cross section showing. 90 a carton with the completed container located therein.

Figure 20 is a view in sectional en d elevation showing means for turning` down the projecting fianges oi. the container.

Figure 21 is a view in perspective showing a modification of the machlne illustrated in Figures 15, 16 and 17; and

Figure 22 is a view in perspective illustrating a carton and metal foil container after 100 receiving the top portion formed by the modi; 42, supported in bearings on'the framework lied device of Figure 21.

Referring to the drawings, the reference numeral 1() designatesI longitudinally disposed beams supporting a horizontal conveyor chain 11 which is actuated intermittently by means not indicated in the drawings. The conveyor chain 11 is provided with spaced lugs 12 between which are mounted cartons or like containers 13, vand which are delivered thereto in any approved manner prior to reaching the container forming machine shown in Figure 1.

The conveyor chain 11 successively moves the cartons 13 which at this stage are open at the top as shown in Figure 13 from right to left as indicated by the arrows in Figures 1 and 2, the said cartons being successively located in register with the apparatus shown in Figure'l for forming and depositing the container proper after which they pass to the top forming and delivering apparatus of Figure 2.

Referring nowto Figures 1 and 3 to 13,

the numeral 14 designates vertical standards, two of which are disposed on each side of the conveyor 11 and which are connected at their upper and lower 'ends by cross beams 15.

A horizontal table 16 disposed above .the said conveyor 11 is supported on the standards 14. A tubular spindle 17 arranged in vertical alignment with the conveyor 11 is guided byvmeans of two pairs of opposed rollers 18 mounted in boxes 19 supported on adjacent standards 14.

The upper'end of the spindle 17 is con- A nected by means of links 21 to the adjacent end of a rocking'lever 22 pivotally mounted on a supporting bracket 23 carried by the standards and the opposite end of the roeking lever is pivot'ally connected to the upper end of a connecting rod 24.

The lower end of the connecting rod 24 is pivotally connected to the top of a slotted slide 25 which embraces a longitudinally disposed driving shaft 26 and a pivot spindle 27, both supported in bearings carried by the adjacent standards.

The driving shaft 26 is fitted with cams 28 and 29 disposed on opposite sides of and in close proximity to the slide 25 and a rolll er 30 projecting laterally from the lower end of the slide engages the cam 28, whilst a roller 31 projecting from the opposite side of the slide 25 engages an upper portion of the cam 29. l

It will thus be seen that the slide 25 is moved upwardly by means of the cam 29 and downwardly by the cam 28, thus reciprocating the vertical spindle 17 through the medium of the mechanism described.

i, A gear 39 on the shaft 26 meshes with an dler pinion 40 which in turn meshes with gear 41 equal in diameter to the gear 39 and secured to a longitudinally disposed shaft of the machine.

A hollow die block 32 conforming in shape 33 to be formed is fitted to the lower end of the vertical spindle 17 and the sides and ends thereof are preferably given a slight downward and inward taper as shown in Figure 14 in order ,to facilitate the removal of the containers as hereinafter described.

A pair of auxiliary dies 34 comprising metal plates having upwardly turned ends are supported by means of arms 35 depending from a block 36 slidably mounted on the spindle 17. A collar 37 secured to the spindle 17 below the block 36 is adapted to normally support the latter in such a position that the lower surfaces of the auxiliary dies 34 are Hush with the bottom of the die block 32.

WVhen the spindle 17/is raised, the block 36 is maintained in engagement with the collar 37 by means of a tension spring 38.

A pair of parallel horizontalguide rails 43 are supported above the table 16 and slightly lower than the bottom of the internal die 32 when the latteris elevated, and said rails are disposed in aligmnentwvith the feed opening between a pair of vertically aligned feed rollers 44 and 45. The spindles 4G of the feed rollers are rotatively supported in upper and lower pairs of blocks 47 and 4 8 respectively which are mounted in vertical slots formed in opposite ends of a supporting bracket 49. l

Vertical adjusting screws 50 are rigidly secured at their lower ends to the upper pair of blocks 47 whilst their upper ends engage the screwed bores of bevel pinions 51 -which are rotatively supported by a cross member The bevel pinions 51 are provided with depending sleeve portions which project through the cross piece 52 and are fitted with collars 53 whereby axial movement thereof is prevented. The bevel pinions 51 are in constant mesh with pinions 54 fitted to a horizontal spindle 55 having a hand-wheel 56 on the end thereof and by the rotation of which pressure may be imparted to the upper feed roller 44.

The spindles 46 of the feed rollers are provided at one of their ends with ntermeshing gears 72 whereby same rotate ip unison and in opposite directions and the lower spindle 46 is provided at its opposite end with a pinthe opposite end of which is provided with a roller engaging a cam 82 on the drive shaft 42.

The cam 82 is shaped to actuatc the feed rollers once. during each revolution of the shaft 42 and, in order to adjust the lengl'h of the web of foil 57', which is projected at each actuation, the-arm 79 is preferably provided w'ith a slot 83.

The drive spindle 7 5 is also provided witli a ratchet wheel 167 which is engaged by a pawl 168 mounted on the frame'in order to prevent retrograde movement and a brake 169 may be provided to prevent overrunning ol the said feed rollers when operating at-fairly high speeds.

A spool 57 is detachably supported in brackets 58 mounted on the table 16 and a web 57 of metal foil or other suitable malerial passes therefrom over a tension roller 59 and around a guide roller 6() to the l'eed rollers 44 and 45 and by means of which it is projected at desired intervalsinto position below the main and auxiliary dies.

A fixed knife 61 (see Figures 3 and 9) is secured to the bracket 49 in advance of the lower feed roller and is provided at one end with an extension 62 on which is pivot ally mounted an upper movable knife 63.

The pivoted end, of the knife 63 is fitted with a small arm 64 which is pivotally connected to the end of an operating member 65 carrying a roller 66 which bears against the hollow body of the die block 32.

a cam 67 secured to a cam shaft 68.

The operating member 65 is guided' by means of a slotted extension 69 thereon em bracing the cam shaft 68.` A spring 63 is provided for maintaining the roller 66 iu engagement with the cam 67.

The cam shaft 68 is driven in unison with the shaft 42 by means of bevel pinions 70 and an inclined transmission shaft 71. It will thus be seen that, during each revolution of the cam shaft the upper movable knife 63 is depressed to co-operate with the lower knife 61 and sever the projected portion of the foil web 57'.

A supporting member 84 hereinafter tei-mei l4 a palm having its upper surface disposed in the place of the guide rails 43 is formed ou the inner end of a horizontal reciprocable bar 85 which is supported by upper `and lower fianged rollers 86 mounted iu side cheeks 87 supported on the table 16.

The outer end of the reiproeable bar 85 is provided with a pin 88 engaging a slot 89 in one end of a rocking lever 90 supported by the standards 14.

The opposite end of the rocking lever 90 is connected by means of an adjustable link v91 to the upper end of a lever 92 supported on the pivot spindle 27 and havinga roller on its lower end engaging a cam 93 on the driving shaft 26.

The cam 93 is so designed as to move the palm 84 inwards towards the feed rollers prior to the actuation thereof to projectthe web offoil 57.

As said web of foil 57 is being delivered by the feed rollers, the palm 84 is moved outwardly in unison therewith by means ofcam 93, thus supporting the free end of the f-oil 5T as clearly shown in Figure 9.

During this feeding movement the side edges of the projecting portion of the foil are supported by the guide rails 43.

Upon the completion of the feeding movement, the upper knife 63 is actuated in the manner above set forth thus severing the projected portion of the web.

When the containers to be formed are rela'- tively small in size it is found that the palm 84 may be dispensed with.

ln order to prevent the auxiliary dies 34 interfering with the foil during the feeding movement, they are preferably raised slightly above the die block 32 by ineens of a cable 9-1 secured at one of its ends to the block 36 and passing around guide-rollers 95 on the vtrame and a pin 96 arranged eccentrically on knife cam 93, the opposite end being secured to the table 16. y

The pin 96 is so disposed as to elevate the auxiliary dies during the feeding of the lfoil Aft-erthe projection of the strip of foil 57, by the feed rollers, vaeumn is applied to the tubular spindle 17 which communicates wiilth 1e lower face of the die 32 is provided with perforations 97 whereby the severed strip of foil is held thereagainst by suction whenvacuum is applied to the tubular spindle.

For this purpose the upper end of the vertical spindle 17 is connected by means of a flexible pipe 98 to a control valve 99 supported vertically above the cam shaft 68 and which is provided with a reciprocating plunger 100 adapted to be actuated by means of a cam 101 on the shaft 68. l

The cylinder 99 of the control valve is con-V nected by pipes 102 and 103 to compressed air and vacuum yclnnnbers^"104 and 105 `respectively and carried by the standards 14 as indicated in Figures 3 and 4.

Compressed air is supplied to the chamber 104, and chamber 105 is maintained under vacuum'by approved means, not shown 1n the drawings.

A pair of opposed brushes 106 (see Flgures 3, 9 and 10) are arranged below the gulde rails 43 and in alignment with the ends of the internal die whereby as the spindle 17 is moved downwardly by the mechanism above described the foil blank is passed between the brushes so that the projecting ends thereof are turned up against the ends of the die block 32 and the auxiliary dies 34 as clearly shown in Figure 10 of the drawings.

After passing through the brushes 106 the downward movement of the auxliarydies 34 is arrested by means of the laterally disposed pins- 107 on the block 36 contacting with the lower ends of vertical slots 108 provided in fixed side plates 109 arranged adjacent to the said block 36.

Two pairs'of upwardly inclined nozzles 110 are arranged below the brushes 106 and in alignment with the corners of the die block 32 and same are'adapted to project jets of air against the corners of the foil after the ends have been turned up'by the Ibrushes 106. This tucking action of the air jets is illustrated in Figure 11. l

The nozzles 110 are connected by means of pipes 111 to a second control valve 112 arranged above the cam shaft 68 and a plunger therein is controlled by a cam 113 on said shaft whereby puffs of air 'are projected by the nozzles at appropriate intervals and following the operation of the brushes 106. Alternatively air may be caused to issue ycontinuously from the nozzles 110. A second pairof brushes 114 are arranged below the'nozzles 110 and are disposed at right angles to the brushes 106 whereby after the corners have been tucked as indicated in Figure` 11, the side portions of the foil are brushed 'into position against the die 32 by means of said brushes 114 (see Figure 12).

As the die 32 with the formed container thereon approaches the lower end of its stroke, an open carton 13 is moved into position therebelow by means of the intermittently movable conveyor 11 so that said container 33 is deposited directly thereinto.

The container is stripped from the die as the latter commences to move upwardly by a puff of air supplied tothe spindle 17 by means of the control valve 99.

As the .die 32 is approaching the upper end of its stroke the auxiliary dies 34 are caught up and raised clear of the' guide rails 43 and the'cycle of operations is repeated.

In order .to correctly locate the cartons 13 with respect to the internal die 32 on the spindle 17 a laterally movable finger 115 is arranged above the conveyor and is adapted to be moved into thepath of said cartons as same are successively approaching the posit1on of register (see Figure 13).

. The positioning finger 115 is fitted to the inner end of a guide bar 116 which is connected by means of a link 117 to one arm of a bell crank lever 118 the opposite arm of which is engaged by a cam 119 on the shaft 42. The distance between the lugs 11 on the conveyor is substantially greater than the length of the cartons whereby when thel conveyor is stopped abruptly the inertia of the cartons causes them to continue their move` ment until they abut against. the positioning finger 115.

The positioning finger is withdrawn by means of the cam 119 before the conveyor 11 is again actuated.

By operating in this way the cartons are correctly located independently of the chain conveyor 11.

After receiving the foil containers 33, the cartons are moved by means of the conveyor 11 to filling apparatus not shown in the drawings where a predetermined amount of cheese or other substance is deposited th'erein.

The filled containers'are then moved step by step towards the apparatusshown in Figures 2 and 15 to 18 inclusive and which is adapted to place a top piece 120 of foil in position thereon to complete theformation of the container.

Prior to reaching lthe top foil unit the projecting 'side flanges ofthe containers 33 are turned down into a horizontal position by means of hinged plates 121 located adjacent to the conveyor 11 and actuated by means of push rods 122 from cams 123'on a cam shaft 124 which is'connected by gears 125 of equal diameter to the shaft 42.

Vacuum tubes 126y are fitted to the inner faces of the hinged'plates 12.1y and same' are connected at their'oppositc ends to av control valve 127 operated by means of a cam 128 on the cani shaft 124 whereby, after the hinged plate has been moved inwardly to effect the depression ofthe adjacent fiap of the carported in vertical alignment/above the table'A in a manner similar to those provided in* the v other unitof the machine and a web of metal foil 134 passes from a spool 135 around a tension roller 136 and a guide roller 137 to said feeding rollers 132 and 133.

'lhe lower feed rollejr` is driven by means of gearing from a spindle 170 which in turn is operated by ratchet mechanism 170 from the cam shaft 124.

The web of foil 134 delivered by the feed rollers passes above a supporting table 138 which is arranged above and on the near side ofthe conveyor-'11 as shown in Figure 15 of the drawings, and same is 'adapted t0 be severed by means of fixed -and movable shear blades 139 and 14() respectively mounted substantially in the manner previously described.

The upper shear blade is provided with cured the shaft 124 whereby the projected web of foil 134 is severed at desired intervals.

A plunger 144 conforming approximately in shape to the tops of the wrapper 33 is seto the lower end of a vertically disposed spindle 145 adapted to reciprocate in a laterally movable slide 146 supported by means of upper and lower antifriction rollers 147 mounted in 'side plates 148 secured to the standards 129.

The slide 146 is provided with a rack 149 engaged by a pinion 150 secured to a transverse spindle'151 mounted in the side plates 148 and a projecting end thereof is provided with a second pinion 152 engaged by a vertical rack 153 the lower end of which is fitted with a roller engaged by a cam 154 on the cam shaft 124 whereby the slide 146 is reciprocated laterally at desired intervals.

The plunger 144 is provided on its lower surface with a recess 155 which is covered by a perforated plate 156 and a central passage in the plunger' rod 145 communicates therewith. A flexible tube 157 connected to the upper end of the plunger rod `145 passes to a control valve 158 which is operated by a cam on the shaft 124 whereby same is placed in communicationwith vacuum and atmospheric air when desired.

The head or upper end of the plunger rod 145 is engaged by an enlarged disc 159 on the lower end of an overhead push rod 160 the upper end of which is connected by means of a link 161 with a rock lever 162 the opposite end of which is connected by a connecting rod 163 to one end of a rock lever 164.

The opposite end of the rock lever 164 bears against a cam 165 on the shaft 124 and which is so shaped as to raise and lower the plunger at appropriate intervals.

The plunger rod 145 is surrounded by a spring 166 which retains the head thereof in engagement with the overhead push :od

The cartons 13 approaching the station disposed immediately below the plunger 144 are located by means of a positioning finger 171 operated from a cam by lever mechanism similarly to the positioning finger 115 previously described.

In operation the foil strip 134 is projected a predetermined distance on to thelsupporting table 138 by means of the feed rollers and the movable shear blade is then operated to sever the blank.

During this feeding and severing operation the slide 146 'carrying the vertical spindle is moved laterally until the plunger 144 is arranged vertically above the blank.

The vertical spindle 145 is then depressed by the overhead push rod 160 so that the plunger 144 rests upon the foil blank and at this moment vacuum is applied to the ports in the plunger which is then raised carrying the blank 120 therewith.

The slide is then moved laterally by the mechanism above described until the plunger is vertically above the intermittently movable conveyor 11 which is so controlled as to station a carton 13 thereunder as the plunger moves downwardly to deposit the top portion 120 upon the top of the foil contailler (sec Figure 19).

The deposition is effected by placing the ports in communication with atmospheric air by means ofthe control valve 158. i

If desired an adhesive substance may be applied to the inwardly turned flanges of the container 33 prior to placingthe top portion 120 thereon.

When, however, the meeting edges of thc container 33 and the top portion 120 are adapted to be folded or seamed the upper portions of the sides and ends of the formed container 33 are not turned down prior to the top piece 120 being placed in position.

In this form of the invention, the plunger 144 passes tbe foil blank 120 through a die plate 167 (see Figure 21) thereby turning up fianges at the sides and ends thereof and said top portion is then deposited in position between the extended sides and ends of the wrapper 33 as shown in Figure 22.

It will be understood that the flanges of the top portion fit neatly within the extended portions ofthe container and these flanges are' adapted to be folded or turned down in any approved manner.

In lieu of passing the top blank 120 through a die as 167 in order to form flanges thereon, said flanges may be turned up by means of brushing elements and air nozzles constructed and arranged in substantially the same manner as those provided in the first unit of the machine.

In lieu of employing a unit as illustrated in Figures 2 and 15 to 18 inclusive for placing the top foil shown in Figures 1 and 3 to 14 inclusive obviously be employed.

I claim:

1. The method of forming containers of yieldable material consisting in locating a blank beneath a reciprocating die, turning up two sides of the blank against the die by passing it between opposed brushing elements, pneumatically tncking the corners of the blank against the corners of the die block and brushing the remaining sides ofthe blank against the said die.

2. The method of forming rectangular containers of yieldable material consisting in projecting a web of the material beneath a' reciprocating die, severing the projected strip, turning up the ends of the blank formed by the severed strip by passing same between may saA

120 in position a second unit .no i

j terial, feed rollers adapted to project a web of material from the spool -below the reciprocating die, means for intermittently actuating the feed rollers, means forsevering the material projected by the feed rollers, guide rails adapted to support the edges of the material projected by the feed rollers, a supporting memberarranged in the plane of the guide rails, and means for moving the supporting member towards the feed rollers prior to the actuation thereof and for returning same at substantially the same speed as the strip of material is rojected in order to support the front end o said blank.

4. In a paratus according to claim 3, a drive sha t a cam on the drive shaft, a reciprocable bar carrying the supporting member and link and lever mechanism for actuating said 'supporting member from the said cam.

5. In apparatus for the formationl of containers, a reciprocating1 internal die, foldin elements and tucking means associated witg the reciprocating die, a spool supporting the container forming material, feed rollers arranged adjacent to the path of movement of the reciprocating die, a web of material passe ing from the spool to the feed rollers, gearing for intermittently actuating the feed rollers to project a strip o f said material,`means for severing the strip of material projected beneath the said die, a spindle carrying the reciprocating internal die, recip'rocable auxiliary dies adjacent to the internal die, means for normally supporting the auxiliary dies whereby their lower surfaces are flush with the reciprocating die, and means for limiting the downward movement of the said auxiliary dies.

6. In apparatus according to claim 5, means for raising the lower surfaces of the auxiliary dies above the lower surface of the internal die when the latter reaches the upper end of its stroke.

7. In apparatus according to claim 5, guides on the frame, a rotating disc, an cccentric member on the disc a flexible member passing from the auxiliary dies around the guides and the eccentric member to a fixed portion of the machine and means for rotating the disc in timed relationship with the reciprocating die. j v A 8. Apparatus for the formation of con-I tainers, comprising a table, a vertical reciprocating spindle, an internal die block on the lower end of the spindle, a drive shaft, a cam loosely mounted on the spindletwo spaced pairs of opposed brush-ing elements arranged on opposite sides of the path of movement of the die and nozzles arranged betweenthe pairs ofsbrushing elements to project jets of air against the partially folded blank and tuck in the corners thereof.

9. In apparatus according to claim 8, a control valve connected with a source of compressed air, a conduit connecting the nozzles to the control valve, and a cam operated in timed relationship with the drive shaft and adapted to operate the control valve whereby jets of air will be delivered by the'nozzles at desired intervals. 10. In apparatus according to claim 8,'a

plurality of holes in the bottom of the die block, a central passage in the vertical spindle communicating with said holes, a control valve for the supply of compressed air and vacuum, a conduit connecting the passage in the vertical spindle with the control valve and a cam operated in timed vrelationship with the drive shaft for actuating said control valve.

` 1l. In apparatus for the formation of containers, a reciprocating die, brushin elements and tucking means arranged adjacent to the reciprocating die, feed rollers arranged adjacent to the path o f movement of the reciprocating die, means for intermittently operating the feed rollers to project a strip of material beneath the reciprocating die, means jfor severing the projected strip of material when the latter is located beneath the die, an intermittently movable conveyor arranged below the reciprocating die and adapted to successively station open cartons in alignment therewith, a positioning member ar' ranged adjacent to the conveyor and means for periodically projecting said positioning member into the path of movement of cartons approaching the station.

l2. In apparatus for the formation of containers, a reciprocating die, folding elements arranged adjacent to the path of movement of the die and adapted to cooperate therewith to fold the sides and ends of a blank against the sides and ends of the die, and means for delivering blasts of air adjacent to'the corners of the die to tuck in the corner portions of the blank between the die and the adjacent sides of the container.

13. In apparatus for the formation of containers, a reciprocating internal die of rectangular shape, folding means arranged adjacent to the path of movement of the die for foldingr the side portions of blanks against the. sides of the die, folding means spared from the lirstinentioned folding means for foldingr the end portions of the blank against the ends oi' the die. and means interposed between the irstand seeond-mentioned foldinzgr means for delivering blasts of air adjacent. to the rol-ners of the die to turk in the eorners ot' the blanks between the diel and the unfolded sides of the blank.

H. lu apparatus for the formation of containers, a reeiproeatiug die of reetangular shape, means for moving the diewithloutI interruption between the ends of its strokeA brushingr elements arranged adjaeent. to the path of movement. of the die for folding the side portions of blanks thereagainst, brushing elements disposed at. right angles to, and spared from, the lrst-uientimied brushingr elements to fold the end portions of the blanks against the ends oi the die. and pneumatie lurking means arranged between the firstand last-mentioned pairs of brushing eleiueuts for forming tucks in the Corners ol' the blanks between the die and the unfolded sides of said blanks.

lu Witness whereol` l hereunto aliix my signature.

FRANoIs nanou) DANIELL.

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