US1818496A

US1818496A - Packaging machine

Info

Publication number: US1818496A
Application number: US94438A
Authority: US
Inventors: Michael J Milmoe
Original assignee: F B REDINGTON Co
Current assignee: F B REDINGTON Co
Priority date: 1926-03-13
Filing date: 1926-03-13
Publication date: 1931-08-11
Anticipated expiration: 1948-08-11

Description

12 Sheets-Sheet 1 Aug. 11, 1931. M. J. MILMoE PACKAGING MACHINE Filed March 13, 1926 Aug. ll, 1931. M.v J. MILMOE PAcxAGmG MACHINE Filed March 13, 1926 12 sheets-sheet 2 Aug. I11, 1931.

M. J. MILMOE PACKAGING MACHINE Filed Haren 15, 1925 l2 Sl-xeeis-Sheet 3 Aug. 11, 1931. M. J. MILMoE PACKAGING MACHINE -Filed Ilarch 13, 1926 12 Sheets-Sheet 4 A TTORNEYS.'

Aug. 1 1, 19,31'. M. J. MILMOE noname ncmrm Filed latch 13. 1926 12 Sheets-Sheet 5 IV'ENTOR. Lc/yl. H M4 f 12 Sheets-Sheet 6 IN V EN TOR.

/fvvl TIORNEY S.

Aug; ll, 1931.v M. J. MILMoE PGKAGING nomma Filed March 13, 1926 M...i. MlLMoE 1,818,496

noname uAcH'IuE Aug. 11, 1931.

Q

1,2 sheets-sheet '1 Filed March 15, '1926 INVENTOR. Mm'.

BYIV w ATTORNEYS.

Aug. ll, 1931. M. J. MILMOE PACKAGING MACHINE Filed March 13, 1926 12 sneet's-shqr s INVENTOR.

E, BY

ATTORNEYS Aug. 11, 1931.

M. J. MILMOE f PACKAGING CHINE Filedlarch 13,A 1926 12 Sheets-Sheet 9 lllllllllllllulrl. mi

:IIHIIIII T11 #lili NNUU i l IN VENTOR. VLM# ArroRNEYs.

Aug. 11, 1931.

12 Sheets-Sheet 10 IN VEN TOR.

ATTORNEYS.

Aug. ll, 1931. M. J. mLMol-z PACKAGING CHINE nica uren 1s,-

1926 12 Sheets-:Shoot 11 lila , meu

/f'm A TTORNEYS.

Aug. 1l, 1931. M. J. MLMoE PAcxAuING ucnnm Filed llarch 15, 1926 12 Sheets-Sheet 12 INVENTOR ATTORNEYS .5.' ,tightly seal the articles in a closed package,

Patented Aug. 11, 1 931 UNITED STATES.

PAT

ENT OFI-ice MICHAEL J. MILMOE, or CHICAGO, ILLINOIS, AssIG'NoR To n.13. REDINCTON COMPANY, OF CHICAGO, ILLINOIs,; A CORPORATION or ILLINOIS PACKAGING; MACHINE Application mea March is, 1926. serial Ng. 94,438.

This invention relates to mechanism for wrapping and sealing articles to be packed, and has for its object the provision of a machine which .will automatically wrap and and which shall be of improved construction and operation.

The invention is exemplified in the combination and'arrangement of parts shown in the accompanying drawings and described in the following specification, and it is more particularly pointed out in the appended claims.

In the drawings- Fig. 1 is a side elevation of a packaging machine showing one embodiment of the present invention;

Fig. 2 is a top plan View of the machine shown in Fig. 1;

Fig. 3 is an end right in Fig. 1;

Fig. 4 is a top plan view elevation looking from the of the conveyer mechanism for feeding articles to the wrap-A ping mechanism;

Fig. 5 is a side elevation ofthe conveyer shown in Fig. 4; i

Fig. '6 is a'vertical sectional-view showing mechanism for transferring the articles from the feeding conveyer to a rotary turret;

Fig. 7 shows aportion of the mechanism of Fig. 6 in a different position Fig. 8 shows the mechanism of Fig. 6 in still -another position;

Fig. 9 is a horizontal sectional view showing the drive ,for the turret;

Fig. 10 is affragmentary elevation, with parts in section, showing the mechanism for transferring the articlesv from the turret to .thewrappinaraeeheeisms'- Fig. 11 isa viewsimfilar toFig. 10 .showing the parts in a different position;

Fig. '12 is a fragmentary elevation showpers to the wrapping mechanism;

` Fig.'13 is a View similar to Fig. 12 showing I the parts in a different position; 4

Fig. 14 is an elevationY of the wrapping mechanism for performing one step ofthe "wrapping-operation;

Fig. 15 is a'view similar -to Fig. 14 showing the parts in a different position;

F1g. 16 is a section on line 16-16 of Fig. 15; ig. 17 is an elevation showing the mech# anism for performing a further step in the wrapping operation; f ig. 18 is a view similar to Fig. 17 showing the parts in a different position;

Fig. 19 is an elevation showing the mechanism for performing the final steps in the wrapping operation; I f' Fig. 2O is a section on line 20-20 of Fig. 19; and

Figs. 21 to 27, inclusive, are top plan views, and Figs 28 vto 34, inclusive, are end elevations of the wrapper showing the various steps in the wrapping Operation." v

Many articles are of suchnature that they are kept. in better conidtion if enclosed in an air-tight or substantially air-tightpackage. Articles of this nature have heretofore'been wrapped in paper treated with parafline or similar material, but even when so wrapped the overlapping edges of the parane paper permit the entrance of air to the package or the escape ofthe contents of the package in case it partially melts or exudes liquid. There are many reasons why articles of different character require a package which is completely sealed. It has been found that by heating the overlapping portions yof a wrapper treated with paraine orsimilar material that they may :be caused to adhere,

forming a sealed container. Great diiiculty, however, has been experienced in devising mechanism by which the :overlapping parts of th heat without injuyto the contents of the package. The present invention 'not only Jprovides means for automatically wrapping articles in a wrapping material suitable for heat sealing, but also provides mechanism by which the wrappers may be sealed without injury tothe contents.

In the embodiment of the invention shown in the drawings, the machine is shown as adapted for, wrapping wafers, such ascakes orcookies, but it will 'be-understood that the principle of the invention may be applied to machines for wrapping a large variety of e wrapper may. be complete y sealed by ranged on edge in a conveyer trough shown in Figs. 4 and 5 having sides 1 and an endless belt conveyer 2 forming the bottom thereof. The conveyer 2 is driven by a chain 3 which passes over a sprocket 4 on the shaft 5. A second chain 6 is also connected with the lshaft 5 and is driven by a gear 7 meshing with a gear 8 operated by a shaft 9 connected with any continuously rotating portion of the wrapping machine. The end of the conveyer 2 is disposed adjacent the conveyer belt 10 which is of less width than the conveyer trough and extends at its forward end between two conveyer belts 11. The conveyer belts 11 are o erated intermittently by mechanism to be escribed while the conveyer 2 travels continuously but at a slower rate of speed than the movement of the belts 11. The belt 10 forms a connecting carrier between the belts 2 and 11 and travels at a speed somewhat greater than the speed of the belt 2, but less than the speed of the belts 11. The purpose of the belt 10 is to prevent too wide a separation of the articles on the conveyer belts due to the intermittent movement of the belts 11. If the belt 2 fed the articles directly to the belts 11 the difference in speed would cause suilicient separation to permit a portion of the articles to fall down and lie flat on the bottom of the conveyer. The interposition of the belt 10 having an intermediate rate of 4speed permits slight separation of the articles so that they become inclined, but will not permit them to be separated suiiciently to fall fiat. When the intermittent carrier comes to rest the overlapping position of the articles will cause them to slide u on one another under the pressure exerte by the articles being fed from the rear by the belt 2 so that they will again assume an upright position in the conveyer trough. The conveyer 2 travels at a sufficient speed to advance the cakes slightly more rapidly than is required for supplying the wrapping mechanism. This insures a continuous supplly of cakes to the wrapping mechanism. e cakes are removed by the wrapping mechanism in groups, as will be eX- plained later. This makes it desirable to feed the cakes to the wrapping mechanism by the intermittently operating feed belts 11 which necessarily travel at a high rate of speed when advancing the cakes and thereafter remain stationary during the period of removal of the cakes. If the belt 2 were arranged to feed the cakes directly to the intermittently movinv belts the rapid movement of these intermlttently moving belts would draw the cakes away from the sup ly belt. leaving a considerable gap. The intermediate belt 10 running at an intermediate speed spreads or separates the cakes as they arefedthereto by amounts which permits them to lie in overlapped relation, but does not spread them enough to permit them t0 fall Hat upon the floor of the conveyer. This spreading is taken up during the stationary part of the intermittently moving belt by the forward y movement of the cakes in the rear of the spread group. As the cakes advance to the wrapping machine it is desirable that any inclination from a vertical position shall be forward and not backward. To insure this position a disc 12 is' mounted on the shaft 9 which carries the gear 8, the disc being disposed over the conveyer trough and having spring-held wipers 14 extending -tangentially from the disc 12 and arranged to engage the tops of the cakes in the conveyer and incline them forwardly.

The conveyer belts 11 pass about a pulley 15 secured to a shaft 16 journaled in the frame of the wrapping machine, as shown in Figs. 2 and 7. A pinion 17 is loosely mounted on the shaft 16 and a pawl 18 is carried on an arm 19 fixed to the lshaft 16. Rotation of the pinion 17 in one direction imparts rotation to the shaft 16 through the pawl 18 and arm 19, but the pawl 18 permits reverse rotation of the pinion 17 without rotating the shaft 16. A gear segment 20 is j ournaled at 21 on the supporting frame and meshes with the pinion 17 An arm 22 eX- tends downwardly from the gear segment and is connected to a link 23. The link 23 may vbe .adjustable in len h by suitable means and the end of the l1nk opposite the arm 22 is pivoted at 25 to an upright arm 26 pivotally supported by a cross-shaft 27 .l

groove 30 in a cam 31 secured to a cam shaft 32. The cam shaft 32 is driven by a sprocket chain 33 mounted on a drive shaft 34. The drive shaft 34 may be operated by any suitable power connection, as by a'belt pulley 35.

This mechanism produces the intermittent feed of the conveyer belts 11, as will be readily understood. An arm 36 is' pivotally mounted on a bracket 37 at one side of the feed conveyer'and is provided with a laterally projecting finger extending through a slot 38 in the side wall 2 of the conveyer, as shown in Figs. 7 and 8. An abutment plate 39 is mounted 0n the laterally projecting finger of the arm 36 and is provided with a tongue 40 extending between the conveyer belts 11 and into a slot 41 in the pulley 15. A link 42 is pivoted to the arm 36 and is oscillated by an arm 43 drivenby the cam shaft 32. The abutment 39 is disposed in the position shown in Fig. V7 during the feeding'movement of the conveyers 11.y The tongue 40 which projects between the conveyers scoops up the forward ledge of the foremost cake and the forward movement of the cakes causes the front cakel to rest against the flat face of the abutment 39. After the conveyers 11 have come to rest the arm 36 will swing y those in the separated shaft 65.

the abutment 39 intothe upright position shown in Fig. 6. This will straighten the cakes at the end of the conveyer into upright position and will move the row of cakes backwardly a slight amount so as to take up any looseness between the cakes caused by the forward tipping of the endmost cakes.

A pair of plunger rods 45 are supported on a head 46 connected with a link 47. The lower end of the link 47, as shown in Fig. 1, is carried on an arm 48 pivoted on the shaft 27 and reciprocated by a cam on the shaft 32. The upper ends of the rods 45 carry a head 49 in position to pass upwardly between the conveyer belts 1l. Guides 5() and 51 direct the rods 45 in their reciprocating movement. The upward movement ofthe head 49 carries a number of cakes upwardly from the conveyer belts 11 into position between a pair of spring-held clamping plates 52 sup-. ported on a rotating turret 53. A fixedplate 54 is arranged at one end of the recess between the clamping plates 52 and springvheld plates 55 are arranged to close the opposite end of the recess. rlhe cakes discharged by the head 49 into the recess between the clamping plates 52 are held in the turret by the spring pressure of the plates 52 and the erid plates 55. At one end of the head 49 there is pivoted a lever 56 on a pivot pin 57. A spring 58 tends to press the upper end of the lever outwardly. The lower end of the lever engages a roller 59 on the Inachine fra-me. The roller 59 holds the top end of the lever 56 inwardly until after the head 49 has begun to lift the section of cakes from the conveyer belts 11. Before the lifted section is moved away from the other ycakes in the series the lever 56 passes out of engagement with vthe roller 59 so that the top end of the lever is moved outwardly. lThis movement separates the cakes in the series from group and at the same time extends the supporting surface of the head 49 so that' there is no danger that the endmost cake will slide od the end of the head. A stripper plate 60 is supported above the cakes adjacent the series to be moved upwardly and is carried on pivoted links 61 and 62. The link 62 has an' extension 63 disposed adjacent a rotary disc 64 mounted on a plate 60 to the right, as viewed in Fig. 6, the

movement being limited by a stop 68. As soon as the upper surface of the head 49' has passed the lower edges of the cakes the stripper 60 will be temporarily released to exert pressure on the endmost cake of the separated series to hold the endmost cake while the upper end of the lever 56 moves outwardly.

movement of thelever 56 which exten A pin 66 is carried by the disc 64 7 the right as viewed inv Fig.

After the uper end of the lever 56 has assumed its outward position the extension 63 will engage a second lug 69 on the disc 64 which will. retract the plate 60 and permit the uper end of the lever 56 to pass the end of the plate, as shown in Fig. 8. By this arrangement any danger of jamming the endmost cake is avoided and when a cake is once started upwardly, although it may at first rest only on the very edge of the plunger, it is prevented from being dislodged ly the length of the plunger after the initial ment thereof. After the cakes have been carried upwardly and deposited in the recess in the turret 53, the plunger head 49 is retracted to permit a new charge of cakes to be fed in position beneath the turret.

The turret 53 in the embodiment shown in the drawings is provided with four arms,` as shown in Fig. 2. The turret is supported on a shaft 70 provided with a suitable footstep bearing and having a ratchet disc 71 attached thereto. A gear 72 is loosely journaledl on the shaft 70 and is reeiprocatedby a rack 73 connected by means of a link 73" to an arm 74 pivotally mounted on the shaft 27. The arm 74 has a roller thereon engaging within a suitable cam 75 on"`the cam shaft 32 so that rotation of the cam 75 oscillates the arm 74 and reciprocates. the rack 73 through the intermediary of the link 73. An arm 82 is secured to the gear 72 so as to rotate therewith .and a pawl 8 1 pivotally mounted on the end of the arm 82 engages the notches 83 in the disk 71 whenever the arm 82 is moved in a clockwise direction as viewed in Fig.l 9. A spring 81 is adapted to yieldingly with the periphery of the disk 71, and whenever the arm 82 is rotated in a clockwise direction, the spring 81 forces the pawl 81 into the notches V83. Counter-clockwise movement of the arm 82 however, will be ineffective to rotate the disk as the spring will yield and permit the pawl to be retracted from the notch 83.

s the move- 5 urge the pawl in. engagement lt is desired, of course, to prevent reverse rotation of the disk 71, and for this purpose I providea detent 82 74 pivoted at 75, the other end of the arm 4 being pivoted at 76 end of the link 77 passes through a recess on the upper end of the arm 77 pivoted as best illustrated in Fig. 3, to a shaft 78. The arm 77 has a lateral projection '79 carrying' aroller 80 whichvengages within a suitable cam groove which is ginning of the movement of 9, the cam 78 tends to rotate the arm- 74in -a clockwise direction toi raise the detent `82out ofthe notch 83 so as to permit/the pawl 8] to rotate the disk 71.

on one end of a lever to a link 77. The other which is in the cam 78' secured to the 'shaft 7 9.` At the bethe rack 73 to 1 .As S0011 as the rack -73 has rol disk 71. When the disk 71 has been rotateda quarter turn by the pawl 81, the detent 72 drops into the next recess 83, which at this time is presented at a position adjacent the detent 82. A spring 84 surrounding the free end of the link 77 and interposed be-V tween an abutment on the end of the link and the arm 77', is adapted to permit the detent 15; 82 to yieldingly engage the outer periphery of the disk 71 so that the detent will be projected into the recess 83 when the recess occupies a position adjacent the detent. By the rotation of the turret 53 the cakes are carried through three-quarters ofy a revolution into position to be discharged into pockets 85 in a conveyer 86 forming a portion of the wrapping mechanism. The conveyer 86 comprises carrier links having plates 87 bent inwardly to form pockets 85 and having ledges 88 and 89 at opposite sides of the pockets, as shown in Fig. 14. Flanges 90 are provided at the extremities of the ledges 88 and 89 to receive the edges of wrappers 91 to retain the wrappers in position on the surfaces of the plates 87. The carrier links 86 are connected by links 92 and the conveyer thus formed travels over rectangular sprocket wheels-93 and 94. The sprocket wheel 93 is secured to a shaft 95 having a ratchet wheel 96 thereon engaged by a. pawl 97 for imparting intermittent rotation to the sprocket 93. The pawl 97 is carried on an arm 98 pivoted on the shaft 95 and connected by a link 99 with an arm 100 pivoted at 101 on the machine frame. The arm 100 is provided with a cam roller 102 which engages a ca-m groove 103 in a cam 104 secured to the shaft 34. The parts are so proportioned that the conveyer is brought to rest intermittently with the endmost link on the sprocket 94 in upright position, as shown in Figs. 1, 12 and 13. While the link is in this position a wrapper 91 is fed into position and formed in the pocket 85 in shape to receive a series of cakes from the turret 53. The wrappers 91 are fed downwardly from any suitable source of supply, not shown, between rollers 105 and the lower edge of the wrapper is -directed by guides 106 into the notch formed by the flange 90 at the lower end of the plate 89, as shown in Figs. 1 and 12. A lever 107 is pivotally mounted at 108 and is connected at its lower end to a link 109 carried bya rocker arm 110 oscillated by a cam on the shaft 32. A spring 111 is mounted on the upper rend of'the lever 107 and is curved upwardly upon itself to permit the curved portion to enter the pocket 85. 'After the wrapper has been deposited'in the position shown in Fig..12\the lever 107 is moved drawn from beneath the flange 90 a contact arm 112 is pivotally mounted concentric with the arm 107 and is yieldingly held to the arm 107 by a spring-pressed friction plate 113 mounted on the. arm 107. As the arm 107 'moves forwardly the contact portion 114 of the arm 112v will be moved against the ledge. 89 and clamps the wrapper to h'old it from sliding when the spring 111 curves the wrapper into the pocket 85. Upon the re turn movement of the lever 107 the arm 112 will strike a Istop 115 to restore it to its ad. vanced position relative to the lever 107. After the spring 111 has moved into the pocket 85 the upper end of the wrapper 91 will be tucked beneath the upper flange 90 to retain the wrapper in its position in the conveyer pocket. The tucking operation is performed by a lever 116 pivotally mounted at 117 and oscillated by a link 118 from the cam shaft 32. The lever 116 has a nose piece 119 movable into contact with the ledge 88. A bar 120 is slidably mounted on the nosepiece 119 and is urged forwardly by a spring 121. The

bar 120 is arranged to register with the upper ange 90 of the conveyer'link and is provided with a lug 122 which extends below the iange 90. The lower edge of the bar 120 passes over the top end of the wrapper 91 and the forward end of the nosepiece engages the end of the wrapper. After the bar 120 has contacted with the ledge 90 it will remain stationary while the nosepiece 119 continues 7 to move toward the conveyer link and the spring 121 will yield to permit relative moveiment of the nosepiece 119 and the bar 120.

This movement will force the top edge of the wrapper 91 from the lug 122 and cause it to snap into the notch beneath the ledge 90. The wrapper will thus be retained in position with its ends held by the ledges 90 and with its central portion formed into the pocket 85 in position to receive the cakes from the turret. v

The mechanism for discharging the cakes from the turretto the conveyer pockets is best shown in Figs. 1, 10 and 11. As shown in Fig. 2, the turret arms are divided longitudinally to provide a central slot 123 above the series of cakes held by theclamping jaws 52. For discharging the cakes from the clamping jaws a discharge plate 124 is supported in position to .register with the slot 123 when the clamping jaws are in position over a conveyer pocket 85. The plate 124 is carried by rods 125 `slidably mounted in a bracket 126 supportedon the machine frame. Spring-pressed friction lates 127 resist movement of the rods 125 1n the bracket 126.

The rods 125 passthroug-h openings in a head l128 which is mounted on a plunger` 129 guided in a sleeve 130 on a bracket 17,31. Collars 132 are fastened to the rods 125 to limit the downward movement of the plate 124 relative to the head 128. Vertical reciproca-tory movement is imparted to the plunger 129 by a lever 133 which is connected to the plunger 129 by a link 134. The arm 133 is attached to a rock shaft 135 which also carries at the opposite end an arm 136 having a link 137 pivoted thereto. The lower end of the link 137 is pivoted'at 138 to an arm 139 mounted on the shaft 27 and operated by a cam on the shaft 32. As the plunger 129 is moved downwardly through the slot ,123 the plate 124 will engage the cakes and forcefthem downwardly from between the spring clamps 52 into the conveyer pocket l85, the cakes entering the depression formed in the wrapper 91."

Spring clamping ngers 140 are provided for engaging theends of the cakes as they are moved out of the turret to hold the cakes in assembled relation. These'clamps are pivoted at 141 to the cross-head 128 and are provided with springs 142 to press the clamping fingers inwardly into contact with the ends of the series of cakes. As the fingers move into registration with the cakes they are held open by guides 143 which engage upwardly extending contact arms 144. When the clamping fingers have reached a position opposite the end of the series of cakes they will be released from the guides v143 and will spring inwardly to clamp the cakes, as shown in Fig. 11. v When the cross-head 128 starts on its downward movement the plate 124 will remain stationary, held by the friction .plates 127 until the cross-head128 engages the top face of the plate 124. The cross-head and plate 124 will remain in lcontactduring i the downward movement of the cakes into the conveyer pocket. On reverse movement of .the cross-head, however, the friction plates 127 will resist upward movement of the plate 124 so that the cakes will be held in the pocket (while the cross-head is raisedl to withdraw the clamping fingers 140. Before the crosshead is raised, however, the ends of the wrapper 91 will be folded inwardly to prevent the cakes from falling over at the ends of the stack. The folding mechanism for the ends of the wrapper is duplicated at each side of the conveyer 86 so that it will only be necessary to describe the apparatus for folding the wrapper at one end of the package.

An arm 145 is securedto a rock'shaft 146 which is operated by a lever arm 147 and a link 148 which` extends downwardly tok a lever 149 carried on the shaft 27 and oscillated by a cam on the shaft 32. '.The end of -movement of the head l128 the cakes folded in against the end of the stacked cakes forming flaps 151 at each side of the folded in portion. The wrapper will be held down and the cakes will be held in the recess formed in the wrapper by the plate 124 during the upward movement of the folder 150. The folder will pass outside of the clamping iinger 140 so tlat the wrafpper will be. folded against the outer side o the finger.' Creasing clamps 152 are pivoted at 153'on the arm 145 and springs 154 tend to move the creasing clamps inwardly against the lateral faces of the folder 150. The clamps are held in their open position, as shown in Fi 14, by a cam rib 155 secured to the frame o the machine and engaging rollers 156 secured to arms 157 connected to the clamps 152. When the folder 150 has moved into registration with the cakes thev rollers 156 will have' passed out of engagement with the cam rib 155 so that the clamps 152 will move inward ly against the sides of the folder 150. This will clamp the fiaps 151 between the folder 150 and the clamps 152, as shown in Fig. 16, thus forming a permanent crease in the flaps so that the inwardly bent fold will be held in position by the creased flaps. This action 0f the creasing clamps pulls the ends of the wrapper from' the flanges 90 permitting the end portions of the wrapper to assume the upstanding vertical position shown in Figs. 14, 15, 17 and 19. The fiaps will be held between the clamps 152 and the folder 150 while the head 128 and the fingers 140 are raised. During the first part of the upward late 124 will beheld down against the top of) the series of cakes by the friction plates'127. In this way the cakes and the wrapper are held in place' during the withdrawal of the clamping fingers 140. When the head S128 engages the collars 132 the plate 124 will be raised in unison with the head to the original posi'- tion shown in Fig. 10. Prior to the upward movement of the' folder 150 the end of the wrapper will have the form shown in Figs. 21 and 28. After the upward movement of the folder and afterthe head 128 hasbeen raised and the folder 150 has been again lowered the wrapper will be in the form shown in Figs. 22 and 29. I/The creased flaps 151 will retain the end fold 158 in position against the endmost cake and retain the cake in position at the end'of the series during further lmovement of!I the conveyer.l The wrapper willremain in this condition with the cakes held in the pocket therein until the i conveyer link containing the wrapper andn reaches the third position from that in which the wrapper ischarged with the cakes.- This position is illustrated in Figs. 17, 18 andl 19.

In the third cakes therein is brought below a transverse rock shaft 159.

lThe' rock shaft 159 is jourposition'v the wrapper with the p 177 is provided with a pair of arms 178 con` naled at the end of an arm 160 which is secured to a second rock shaft 161. A head 162 y metal chilling surface and radiating fins 168 connected therewith. The shaft 161 is provided with an arm 169 connected to a link 17 0, the lower end of the link being connected to a pivoted lever 171 which is operated by a.

cam 172 on the shaft'79. A spring 173 is interposed between the link 170 and the lever 171 to provide a yielding action to the link 170 and the shaft 161. AAn arm 174 is secured to the shaft 159 and is connected to a link 17 5, the lower end of which is pivoted to a bell crank lever 17 6 mounted on the shaft 27 and oscillated by a cam' on the shaft 32. A shaft nected by a wiper plate 179 which extends across the conveyer and joins the opposite arms 17 8. The shaft 177 is oscillated by an arm 180 connected by a link 181 to an arm 182 mounted on the shaft 27 and oscillated by a .cam on the shaft 32. A spring-held contact member 183 is disposed adjacent each end of the plate 179 in position to engage the roll of cakes whenthe arm 178 is swung downwardly, as shown in Fig. 18. When the wrapper reaches the position shown in Fig. 17 the arm 178 is moved inwardly to the position shown in Fig. 18. This will cause the plate 17 9 to engage the rear upstandng flap of the wrapper 91 and move it to the position shown in Fig. 18. This will bring the inner faces of the two ends of the wrapper into contact, as

shown in that figure. The plate 163 bends the end of the'wrapper backwardly over the edge of th`e plate 179 and the plate 164 holds the front end of the wrapper in position to engage the bent back portion of the rear end. After the parts have assumed the position shown in Fig. 18 the

shafts

159 and 161 will be oscillated to move the heater 165 against the contacting ends of the wra per and press these ends against the plate 1739 in the manner illustrated in Fig. 20. This will sufficiently melt the paraiiine on the parts so that when thechiller 167 follows overthe wrapper the melted parafine will be caused to congeal and seal the two ends of the wrapper tightly together. It should be noted that the overlapping portions of the wrapper'are not sealed against the package, but are sealed so while held away from the package and that the plate 17 9 is interposed between the wrapper and the package during the sealing operl ation. This provides a smooth. surface for backing the wrapper during the sealing operation and also prevents any possibility of 1n- 1,ais,4ee

jury to the contents of the wrapper by the heat of the sealing iron. After the overlapping portions have been sealed the package will be in the form shown in Figs. 23 and 30.

As the package is carried forward from the position beneath the shaft 159 it will pass bene'ath a plate 184 which will bend the sealed flap backwardly against the package and further chill the paraine of the wrapper. An arm 185 is secured to a shaft 186 and is provided with a folder 187 which is moved forwardly into contact with the projecting end of the wrapper as the package is carried forwardly. This folds the rear portion of the projecting end against the end of the package, as illustrated in Figs. 24 and 31. A spring-held folding plate 188 is disposed adjacent the path of the end of the package and folds' the forward portion of the projecting."

is carried on a bar 191 pivotedto an arm 192.

The arm 192 is pivoted at 193 on a bracket 194 secured to the frame of the machine. The arm 192 has an upstanding arm 195 rigid therewith and having a block 196 through which a rod 197 passes. A collar 198 limits,

the movement of the block in one direction on the rod 197 while a spring 199 resiliently holds theblock against the collar. The rod 197 is pivoted at 200 to an arm 201 secured to the shaft 17 7. When the shaft 17 7 is oscillated to move the plate 179 against the wrapper 91 the holding blade 190 will be resiliently moved forwardly in'to the position showny in Fig. 20. During the forward movement of the blade it will pass beneath the' sealed flaps of the wrapper and rotate the package about the horizontal axis to bring the sealed edges. against the forward wall ofthe pocket in the conveyer and to .bring the flap 189 into edge- .y

wise position projecting from the front edge of the end of the package and is shown in Figs. 26 and 33. -A stationary folder 202 is provided for folding the flap 189 against the end of the package as the package is carried forwardly by the conveyer. This will leave the package in its final form, as shown in Figs. 27 and 34. Heating elements 203 are arranged at the sides of the conveyer in-position to engage-the end flaps 189 to partially melt the wax on these fla-ps. Cooling plates 204 are disposed in the path of the conveyer to engage the flaps immediately after they leave the heating plates 203 to chill the waX and seal the end iaps 189 in their folded position. In this way the package is completely sealed and constitutes an air-tight closure for the articles within the package.

The arm 185 is provided with a curved contact finger 205 pivoted to the arm at 206y and provided with a the finger 205 against a stop pin 208 on the arm 185. When the arm 185 is rocked forwardly to fold the end of the wrapper, the

finger 205 will be moved upwardly to the position shown .in Fig. 17. This causes the upper end of the iinger to engage the rear flap 91 of the wrapper to insure that the flap projects upwardly into the path of the plate 17 9. Whe-n the arm 185 is returned to its retracted position the linger 205 will rest upon a stop 209. An arm 210 is pivoted at 211 on a bracket 212 and is provided with an inwardly projecting finger 213 for engaging the end of the package to hold the wrapper against the endmost cake while the overlapping ends are Sealed, as shown in Fig. 20. A spring 214 normally draws the arm 210 inwardly and r t-he movement of the arm is controlled by a cam 215 which bears against a platev 216 on the arm 178. As the arm 178 moves downwardly the pressure of the face of the cam 215 will permit theI finger 213 to move inwardly under the pressure of tlie spring 214. When the arm 17 8 is again raised the face of the cam 215 will again force the finger outwardly to permit the next wrapper to move into position without interference of the finger with the projecting flap 151. The package may be discharged from the conveyer pockets by a lunger 217 carried on an arm 218 supported Ey a sliding rod 219. The arm 218 is raised and lowered into and out of registration with the pocket byineans of a link 220 operated by a cam on the shaft 34. The rod 219 is slid longitudinally by a lever 221 operated by a cam 222 on the shaft 79. The mechanism for feeding the cartons into position to receive the sealed packages is not shown. A hand wheel 223 may be attached to the shaft 32 in order to turn themechanism by hand for inspection or other purposes and a similar wheel 224 is provided with a pinion 225 meshing with a gear 226 on the shaft 34. At the point in the conveyer for feeding the cakes to the wrapping mechanism where the conveyer belt 2 discharges to the conveyer belt 10, a plate l227 is arranged in the bottom of the conveyer having a beveled edge 228 extending diagonally across the belt 2. Since the cakes are circular they will rest on the belt 2 along the central line of the be'lt so that the point of the plate 227 will enter beneath the cakes while they still rest upon the belt 2. In this way the cakes will be fed onto the plate 227 by the forwardly moving belt and will be carried across the space between the lbelts 2 and 10.` The forward end of the plate 227 is proi vided with a notch 229 into which the belt 10 spring 207 tending to hold veyer belt or the cakes may be placed on the belt 2 by hand. The side 1 of the conveyer trough is provided istering with the inclined edge 228 of plate 227. If a cake lies flatwise on the belt 2 it will be discharged through the opening 231 by the inclined edge 228.

After the marginal edges of the wrapper have been heat-sealed by the passage of the heater 165 and the chiller 167 over the edges while the edges are held against the plate 17 9, the arm 178 is moved backwardly to withdraw the plate 179 from contact with the sealed edges. l During the initial reverse movement of the arm 178 the stripper finger 183 will continue to press against the package dueto the spring pressure against the -iinger. This will hold the package fro-m being displaced in the conveyer pocket in ease' the sealed iiaps should tend to adhereto the plate 17 9.

1. In a wrapping machine, a conveyer for delivering a line of articles to said machine, means for supporting wrappers for receiving a plurality of said articles, and means for delivering sections of said line of articles including a plurality thereof from said conveyer to a position adjacent said wrappers.

with an opening 231 regasl 2. In a wrapping machine, an interinit'` tently operating conveyer for delivering arfor movingwrappers to a position for receiv- A ing a plurality of articles from said conveyer, and means for transferring a plurality of articles from said conveyer to a position above said wrappers.

3. In a wrapping machine, an intermittently operating conveyer for delivering articles in alinement to said machine,'.ineans for transferring a section from said line including, a plurality of said articles and for delivering said section of articles in assembled relation, and means forI moving wrappers into position to receive the articles from said delivering means.

4. In a wrapping machine, a form for repression therein, means for forcing a wrap per into said depression with portions of said wrapper projecting from said depression, and means for engaging the projecting portions of said wrapper to retain said wrapperin said form.

5. In a wrapping machine, a form having a depression in one face thereof and having surfaces extending from opposite sides of said depression, means for inserting the central portion ofa wrapper in said depression with the edges of said wrapper extending over said extending surfaces, and means for engaging said projecting edges to retain said Wrapper in said form.

' 6. In a Wrapping machine, a form having one face thereof provided with a depression, means at opposite sides of said depression for engaging the edges of a Wrapper, means for inserting the central portion of a Wrapper in said depression, and means for positioning the edges of said Wrapper in contact with said engaging means.

7. In a Wrapping machine, a form for receiving a Wrapper having one face provided With spaced notches for receiving the opposite edges of a Wrapper, said face having a depression therein between said notches, means for feeding one edge of a Wrapper into the notch at one side of said face, means for pressing the central portion of said Wrapper into said depression, and means `for inserting the opposite edge of said Wrapper inthe other of said notches.

8. In a wrapping machine, a form for receiving awrapper having one face thereof provided With spaced engaging means and having a depression in said face between said engaging means, means for engaging one edge of a Wrapper with one of said engaging means, means for pressing the central portion of said Wrapper into said depression, and means for engaging the opposite edge of said Wrapper with the other of said engaging means.

9. In a Wrapping machine, a form having a Wrapper receiving face provided with an arcuate depression therein, means for depressing the central portion of a Wrapper into said arcuate depression, and means on said form for engaging projecting portions' of said Wrapper to retain said Wrapper in said arcuate depression.

10. In a Wrapping machine. a form having an arcuate depression in one face thereof and having notches at opposite sides of said arcuate depression and spaced therefrom, means for feeding one edge of a Wrapper into one of said notches, means for temporarily engaging said Wrapper to retain said edge in said notch, and means for pressing the central portion of said Wrapper intosaid depression While the edge of said Wrap-per is retained in said notch.

11. In a AWrapping machine, a form for receiving a Wrapper having one face thereof provided with a depression and having notches disposed at opposite sides of said depression and spaced therefrom, means for feeding one edge of a wrapper into one of' said notches, means for temporarily engaging said Wrapper to retain said edge in said notch, means for pressing the .central portion of said wrapper into said depressionwhile said edge is-retainedin said notch, and means for inserting the opposite edge of said wrapper into the other of said notches to retain said Wrapper in position with the centra-l portion disposed within said depression.

12. In a Wrapping machine, a form for receiving a Wrapper having a backwardly projecting ledge at one edge thereof for engaging the edge of a Wrapper, and means for inserting the edge of said Wrapper beneath said ledge, said inserting means comprising a. movable member having' a spring-held projection thereon' for engaging said ledge to direct the edge of said Wrapper beneath said ledge, said member being movable to move the edge of said Wrapper beneath said ledge While guided by said spring-held projection.

13. In a Wrapping machine, a form having a depression therein, a member for pressing a Wrapper into said depression, and a holding device for engaging said wrapper While pressed into said depression.

14. In a Wrapping machine, a form having a depression therein for receiving a Wrapper, a movable member for pressing a Wrapper into said depression, and a holding device connected with said movable member and movable relative thereto, said movable member being arranged to engage said Wrapper to retain it in place While said Wrapper is pressed into said depression.

15. In a Wrapping machine, a form having a depression therein for receiving a Wrapper, an arm having a contact member thereon for pressing said Wrapper into said depression, a holding member pivoted to said arm and 4movable thereby into engagement with said wrapper to hold said lWrapper While pressed into said depression, and yielding means against movement relative to said arm.

16. A Wrapping machine comprising a form having a depression in one face thereof and overhanging ledges at opposite sides of said depression and spaced therefrom, means sesA for retaining said holding device for feeding the edge of a Wrapper beneath one of said ledges, means for engaging said Wrapper to retain said edge beneath said ledge, means for pressing said Wrapper into said depression While so retained, a guide for engaging the other ledge of said form, and means for moving the opposite edge of said Wrapper relative to said guide into position machine comprising a-