US1927011A - Butter wrapping machine - Google Patents

Description

Sept. 19, 1933.

A. H. BOILEAU BUTTER WRAPPING MACHINE Filed June ,10 1929 6 Sheets-Sheet l Sept, 19, 1933. A H, BOILEAU BUTTER WRAPPING MACHINE Filed June 10, 1929 6 Sheets-Sheet 2 Sept. 19, 1933.

A. Hf BOILEAU BUTTER WRAPPING MACHINE Filed June 10, 1929 6 Sheets-Sheet 3 Sept. 19, 1933. A. H. BOILEAU BUTTER WRAP PING- MACHINE Filed June 10, 1929 6 Sheets-Sheet 4 w 1933 A H. BOILEAU BUTTER WRAPPING MACHINE Filed June 10, 1929 6 Sheets-Sheet 5 Sapt. 31%, N330 A. H. BOILEAU Q K BUTTER WRAPPING MACHINE File d June 10 1929 s Sheets-Sheet 6 Fatented Sept. 19 1933 UNITED STATES PATENT OFFICE BUTTER WRAPIIN G DIACHINE Application June 10, 1929. Serial No. 369,557

14 Claims.

My invention relates to improvements in butter wrapping machines.

The principal object of the invention is to provide an improved butter wrapping machine which can be operated at high speed to produce a large output of completely wrapped prints in a relatively short space of time. which will be entirely automatic, dependable in operation, and which will be compact and simple in construction.

A further object of the invention is to fold wrappers tightly and neatly about the butter prints with the minimum of movement of the prints during the folding operations.

A further object is to provide an improved !5 wrapper folding mechanism that will automatically adapt itself to slight variations or irregularities in the prints and will not jam or damage the prints or wrappers in their passage through the machine.

A further object is to provide a foldingmechanism which is removable and replaceable in the machine as a unit for the purpose of adapting the machine to different sizes of prints to be wrapped.

A still further object of the invention is to provide an improved method of folding the wrapper whereby the wrapper will be self sealing and will have no loose or projecting end folds to become loose.

39 Other objects of the invention will appear hereinafter.

Fig. l is a view in side elevation of a wrapping machine embodying my invention.

Fig. 2 is a top plan view of substantially half of the machine the rolls of wrapping paper and the perforating device being removed to show the mechanism beneath.

Fig. 3 is an enlarged vertical section on the line 3--3 of Fig; 2.

1 Fig. 4 is a staggered transverse vertical section on the line 4-'-4 of Fig. 3.

Fig. 5 is an enlarged plan view of the wrapper folding chute. Fig. 6 is an end view thereof. Fig. '7 is a perspective view of the folding chute shown in Figs. 5 and 6; and

Figs. 8 to 15 are diagrammatic views arranged in progressive order to illustrate the several folds the wrapper is given to completely enclose the butter print in its wrapper, the completely wrapped print being shown in Figs. 14 and 15. In Fig. 15 the wrapped print is inverted to show the bottom folds. Figs. 8 to 15 show clearly the several folds which are given to the wrapper in the process of completely enclosing the butter print. In these views Fig. 8 shows the wrapper B in position above the print of butter A to be folded about the print as the print and wrapper are carried upward from the feeding level of the machine to 0 the discharging level. The machine shown in the other views is arranged to apply one or two wrappers about the print as desired. However, for the purposes of illustration the wrapper B is indicated as a single sheet cut to the proper size for the print.

In the operation of the machine the wrapper B is brought into position above the print and the print is moved or carried directly upward from the feeding level to the discharge level. During this vertical movement the wrapper is folded against the ends and sides of the print. The top face of the print engages the wrapper. The extending portions are folded downwardly along the side faces of the print and project below to form bottom flaps 1. The portions of the wrapper which extend beyond the ends of the print are folded, Fig. 9, against the ends of the print to form end tucks 2, leaving end flaps 3 having diagonal upper edges 3'. The end flaps 3 are folded toward each other and against the ends of the print with one end flap overlapping the other, Figs. 10 and 11, and both flaps overlapping the end tucks 2.

Fig. 11 shows thewrapper completely folded at the top, sides and ends of the print, these folding operations havingall been made during the short upward movement of the print from the feeding level to the discharge level. When the print reaches the discharge level it will have been wrapped to the extent shown in Fig. 11. The bottom tucks 4 and one of the bottom flaps 1 are then made while the print is in this position. The remaining bottom flap is finally folded, Fig. 12, during horizontal movement of the print in 5 the act of discharging it from the folding mechaism. During this movement the bottom flap 1 is folded into place against the bottom of the print with a portion thereof overlapping a portion of the previously folded bottom flap 1, Figs. 14 and 15, thus completing the wrapping operations. Due to the fact that the butter is moist and that if desired one of the wrappers may be wet, the wrapper adheres to the print. It will be noted that the end flaps 3 are held by the bottom flaps 1 and that the bottom flaps adhere to the print, hence there is no likelihood that the wrapper will become loosened or the folds disarranged while the prints are handled. The terms used for designating the different flaps or bers C ping mechanism is sufficient.

folds of the wrapper are intended to serve as means for identifying the folding operations of the different parts of the mechanism hereinafter described.

The machine shown in general in Fig. 1 is designed to carry out the above folding operations. The supporting frame C of the machine is made up of suitable corner legs and cross members. In the lower part of the frame a driving motor D is mounted. This motor drives a pulley 10 by means of the belt 11. The pulley is mounted on the shaft 12 which extends into a housing E con taining gears and cams which are connected by operating links and levers to the various operating parts of the machine. This drive structure may be of any suitable type for the purpose and is not further described except in so far as reference to it is made as the source of power for the various links and levers connected to it.

The paper which forms the wrappers B is contained in suitable rolls 12 and 13 as continuous strips from which the wrapper sheets 13 are successively cut. The frame has upright side memsupporting the wrapper rolls Fig. 1, the rolls being rotatably mounted at the ends of oppositely extending arms 14.

The machine illustrated in the drawings is of the duplex type which is arranged to simultaneously and independently wrap two prints at each operation. This is indicated in Fig. 4 which shows the duplicate operating parts side by side in the frame for wrapping two prints at a time. However, each wrapping mechanism is complete in itself and independent of the other, except that they are both mounted on a common supporting frame and connected to operate in unison, hence a detail description of one wrap- The unwrapped prints are placed upon and fed in a row along a horizontal feeding table F, and the end print in the row is successively removed from this feeding level and elevated to the level of the discharge table or chute G Figs. 1 and 3.

The feeding mechanism for the wrapper sheets comprises the three feeding rolls 15, 16 and 17 and the conveyor belt 18 which are positioned in the frame between the feed table and the discharge chute, Figs. 1 and 3. These feed rolls are mounted in suitable bearings in the frame, and are all geared (not shown) together to rotate in unison and at the same speed. The upper roll 15 carries at one end Fig. 1, a sprocket wheel 19 which is driven from a driving sprocket 22 by a drive chain 20 extending around the sprocket 21 and the driving sprocket 22, the means associated with sprocket 21 being arranged to drive the butter feed table. The driving sprocket is mounted on the gear box E and driven therefrom. The middle roll 16 is mounted in such manner that it is yieldingly drawn by the spring 23 against the upper and lower rolls so that the rolls will properly grip the wrapper strip and the wrapper strip will be properly fed. The strips of paper 24 and 25 from which the wrappers B are cut pass around the upper roll 15 and between the upper roll and middle roll and then between the middle and lower roll. The wrappers are cut by the feed rolls from the strips and carried horizontally by the conveyor belts 18 across the vertical path of the print when it is carried upwardly from the feeding to the discharging levels. The conveyor belts preferably consist of endless coil springs traveling in grooves 26 in the lower feed roll 17. These belts extend horizontally to suitable grooved idler rolls 27 supported by the standards 28 on the frame. Between the conveyor belts are two sets of oppositely disposed supporting fingers 18 Fig. 3 supported at their outer ends 18" on the bracket 28 and the frame. These supporting fingers lie substantially in the plane of the upper reach of the conveyor belts and serve to support the wrapper sheets 13 in position and prevent them from sagging. The ends 18" of the one set of fingers, are turned downwardly to guide the wrapper sheet back into level condition in the event that the forward edge of the sheet should tend to sag as the belts carry the sheet. The ends of the fingers are spaced apart just sufficiently to prevent their interference with the butter print as it is carried upwardly by the elevator. Strippers 28' in the form of spring members mounted on a cross bar on the frame and extending between the middle and lower rolls, are provided for insuring the release of the sheets from the lower knives and directing them onto the conveyor.

The wrappers A are cut from the strips by suitable knives carried by the upper and lower feed rolls. The upper feed roll carries a set of knives 29 which are arranged to slit the strips transversely at intervals to partially sever the sheets from the strips. The lower feed roll 17 carries a knife 30 which slits the uncut portions left by the upper knives 29 and completes the severance of the wrappers A from the strips. The middle roll has a suitable groove 31 which registers with the knives so that the cutting knives may actually pass through the paper in the act of making their cuts. The feed rolls are all of the same diameter and driven at the same speed so that the slits made by the knives in the lower roll will always register transversely of the sheet with those made by the knives in the upper roll and the resulting cut will be in a straight line across the strip.

The two supply rolls 12 and 13 are shown so that double wrappers may be provided for the prints. One of these wrappers, usually the inner one, may be a wet wrapper and the other a dry one, but it is obvious that if desired a single wrapper, either wet or dry may be used. The drawings Figs. 1 and 3 show the strips from both of the rolls 12 and 13, passing between the feed rolls to provide a double wrapper. The strips meet and are brought together at the roller 32 mounted in the frame, the strip 25 from roll 13 passing around a take-up roller 33, while the strip 24 passes around a take-up roller 34. A water trough 35 is mounted between the uprights C of the frame. The strips 24 is passed around the rollers 36, 37 and 37' Fig. 1 so that it dips into the trough 35 and thus become moistened. A roller 38 is also provided opposite roller 34 so that the strip 24 may be passed horizontally through a suitable perforating mechanism 39 mounted on the uprights C of the frame. The purpose of this perforator is to place identifying perforations in the strip 24 when desired.

The prints A cut to proper size are placed in a row Fig. 3 on the horizontal feeding table F and the row is intermittently moved toward a stop block 41 which is mounted on the frame, so that the end print will be placed in position to be taken from the row by the elevator and carried upwardly to the discharge level. After the end print is removed the row is again shifted to bring the next end print into position. Any suitable mechanism may be used for intermitill tently shifting the row on the feed table to feed feed board 40'. The feed board 40' is positioned between the rails and is arranged to be moved upwardly against the row of prints to raise them slightly off the rails and then moved longitudinally to shift the row towards the stop block 41.

The feed board is then lowered and returned for the next operation. This feeding mechanism in itself constitutes no part of the present invention. I

The prints pass beneath a shear block 42 which serves to hold the second print from the end in the row from being moved vertically. It does not interfere with the removal of the end print. The shear block is positioned with its vertical face 43 spaced from the face of the stop block the width of a print and in the line of separation between the first and second print in the row. Its lower face 44 is spaced above the feed table the height of a print and its forwardedge 45 is beveled to insure the entrance of the prints into this space. The shear blocks for both sides of the machine are mounted on a transverse bar 46 supported by the frame and arranged with shims back of it whereby the shear blocks may be accurately adjusted to the size of the prints.

The elevator for each side of the machine consists of a head 47 Figs. 1, 3 and 4 mounted on the upper end of a vertically disposed rod 48 and carrying a platform 49 preferably made of wood so as to minimize the adherence of the butter print to the platform. The supporting rods 48 are mounted in suitable hearings in the upper and lower portions of the frame and have sufficient length of stroke to carry the prints from the feed table level to the discharge level. The rods 48 for the two elevators are connected by a transverse yoke 50 so that they will move in unison. The elevators reciprocate in proper timed relation to the rest of the mechanism. The lever 51 is connected to the power mechanism E at one end. Its outer end is pivotally connected by means of the link 52 to the yoke 50.

The elevator carries the print upwardly and the top face of the print engages the cut wrapper B which has been brought into position by the conveyor as previously described. The movement of the print and the wrapper continues upwardly through a vertically disposed folding chute to the level of the discharge chute. The parts of the folding chute are all mounted in a rectangular box like frame 55 Figs. 4 to 7, the end portions and one side of which are preferably formed in one piece. The inturned ends 56 are detachably fastened by screws to a depending flange 57 which is formed on the under side of the discharge table H. The parts of the folding chute are mounted in this manner so that the folding chute constitutes a unit whichcan be removed and replaced as desired.

The folding chute has two oppositely disposed side walls 60 and 61 spaced apart substantially the width of a print and having their lower edges 62 slightly flared to insure the entrance of the print in the chute without damage to the edges of the print. These lower edges fold the wrapper downwardly along the two side faces of the print Fig. 9 as the print and wrapper move upwardly into the chute. The opposite ends of the side wall 61 have arms 63extending inwardly at right angles and these arms support end tucker blocks 64 Figs. 5 and 7. These tucker blocks have been termed end tuckers because they operate to fold the upper end tucks 2 in the wrapper at the ends of the print Fig. 9. The end tuckers are situated at practically the lower entrance of the chute. They are substantially the width of a print and are spaced apart substantially the length of the print. Their lower edges 66 are rounded so that as they engage the extending end portions of the wrappers to fold said portions down against the ends of the prints they will not damage the edges of the print. The end tucks 2 are formed practically at the same time that the side folds are made when the print and wrapper enter the chute. Hence by the time the print has progressed upwardly in the chute to the extent that its lower face is even with the lower edges 62 of the chute, the side folds and upper end tucks will already have been completed. Furthermore during this progress the folding of the remaining end flaps 3 will have already been started.

The folding of the end flaps 3, Figs. 3, 7, 9, 10 and 11, is accomplished by the end flap folders 68 and 69. These folders are in the form of end walls for the chute. They are positioned with their irmer faces at right angles to the planes of the side walls. The folders 68 are mounted on the side walls 61 adjacent the ends thereof while the members 69 are mounted at the ends of the side walls 60. Their opposing edges 68' and 69' are curved in opposite directions so that as the print and its wrapper moves upwardly in the chute, these curved edges engage the end flaps 1 and fold them against the ends of the print, with one flap overlapping the other. The folding edges merge at their lower ends with the respective side walls and curve upwardly toward each other. "The curved edges 68' of the folders 68 are slightly lower than those of the opposite folders 69 so that the folding of one of the end flaps 3 takes place slightly in advance of the other and insures the overlapping of the one flap upon the other, Figs. 3, 7, 10 and 11. By the time the upper face of the print reaches the upper edges of the side walls of the chute the folding of the end flaps will have been completed.

These upper edgesof the side walls are positioned just beneath the level of the discharge table H, Figs. 3 and 7. The print, however, is carried upwardly beyond these upper edges into position to be discharged horizontally from the chute on to the discharge table H. The end walls of the chute have upwardly extending portions 70 and 71 forming continuations of said end walls and serving to engage the ends of the print to hold the end tucks and end flap folds in their folded condition.

The side walls 60 and 61 are each made in two sections, Figs. 4, 5 and 7. They have outstanding flanges or lugs 72 and 73 respectively on their outer faces. The corresponding flanges onthe wall sections have bearing sleeves '74 and '75 respectively which are arranged to slide on upper and lower parallel guide rods 76 and '77 respectively. The sections of each wall may thus move longitudinallytoward and from each other to vary the length of the chute. The rods '76 carry springs 79 between the frame 55 and the flanges 72, acting to yieldingly urge the wall sections 60 toward each other. The length of the chute is thus yieldingly variable to adapt it to the prints y and wrappers and at the same time maintain However, the sections of the side wall 61 are subject to the yielding action of the springs 79 because of the fact that their upper extensions 71, Fig. 7, have pins 80 which are positioned in holes 81 in the upper extensions 70, thus connecting the corresponding ends of the two sides of the chute together. The pins 80 have enlargements or balls 82 at their ends and the holes 81 are large enough to admit these balls. This construction forms universal joints between the two sides of the chute and will permit the opposing side walls to be moved relatively toward and from each other as hereinafter described, but will not permit the opposing sections of the side walls to move lengthwise relatively to each other. The purpose of this construction is to prevent the corresponding end walls 68 and 69 from getting out of register with each other.

The flange 57 carries a bolt 83 which has a cone shaped head 83' and which is adjustable toward and from the chute. This cone shaped head is positioned between the flanges 72, Figs. 5 and 7, on the sections of side walls 60. By adjusting this screw the cone shaped head wedges between said flanges and determines the adjustment for length of the chute. Although this constitutes a means by which the limit of contraction in the length of the chute may be adjusted, it does not interfere with the lengthwise expansion of the chute against the action of the springs 79. This adjustment by means of the cone-head 83, of course, is transmitted to the sections of side walls 61 through the medium of the universal joints 80 and 81 previously described.

The ends of the guide rods 77 Figs. 5 and 7 are mounted in elongated slots 85 so that they may shift laterally therein, and, since the side wall 61 is mounted on these rods, this wall is movable relatively to the wall 60 to render the width of the chute adaptable to variations in the prints. The rods 7'7 have a cross piece 86 connected between them and located midway of their length at the point corresponding to the division line between the two sections of wall 61. This cross piece 86 carries a stud 87 which extends loosely through a hole in the frame 55 and has adjusting nuts 88 on its outer end. A spring 89 is positioned on the stud 87 between the cross piece 86 and the frame and normally holds the side wall yieldingly against the print. The stud and nut constitute a means of adjusting the limit of contraction in the width of the chute but does not effect the expansion in the width of the chute. The side wall 61 is thus capable of yieldingly adapting itself to the variations in the print, and

its movement for this purpose can be either angular or in parallel relation with the plane of the opposite wall 60. The universal joints 80 and 81 previously described permit this flexibility of the side wall 61 while maintaining the connection between the two sides of the chute.

The discharge chute G comprises in general a flat table H, Figs. 2 and 3 mounted on the frame of the machine and disposed horizontally with its supporting surface in a plane slightly above the upper edges of the end walls of the chute. It carries the depending flange 57 which supports the chute frame 55 as previously described; This table also has arms 90 which carry pairs of laterally extending guide studs 91 upon which are slidably mounted the bottom end tuckers 92.

- These bottom tuckers are in the form of flat thin blades 92 carried on blocks 93, Figs. 2, 4 and 6, which slide horizontally on the guide studs 91. The end walls of the chute, Fig. 7, have slots or openings 94 which permit the tucker blades to move into and out of engagement with the wrapper and print. The blades are arranged to form the bottom end tucks 4, Figs. 12 and 15 by folding the end portions of the wrapper against the bottom side of the print.

The tucker blades are operated in proper timed relation by the cams 96 which overlie the tucker blades and which are mounted on the pusher block J. Each tucker block 93 carries an upstanding stud 97 which rides in the cam slots whereby the tucking motion will be imparted to the tucker blades. The pusher block J is reciprocated horizontally in proper timed relation and parallel to the chute G. The pusher block J is in the form of a bar which extends across the full width of the machine and is common to both folding mechanisms. It has elongated bearing sleeves 98 Figs.'1, 2 and 4 at its ends which slide on the horizontally disposed parallel guide rods 99 suitably mounted on the side members of the frame. The pusher block is reciprocated horizontally toward and from the discharge chute by a series of links and levers. Referring to Fig. 1, a bell crank lever 100 is pivoted in the frame at 101. One of its arms extends upwardly and is pivotally connected to link 102 which link is connected at 103 to a depending lug on the pusher block. The other arm of the bell crank lever is pivotally connected at 104 to a link 105 the lower end of which is pivotally connected at 106 to a crank 107 driven from the gear box E.

The pusher bar J has a forward extension 110 for each folding chute, this extension being of the proper width, Figs. 2 and 7, to pass between an extension 70 and 71 of the folding chute. The forward edge of this extension has an angle memher, one flange 111 of which is fastened to the edge of the extension and is positioned vertically. This forms a pusher face which engages the side face of the print and pushes the print horizontally from the elevator and into the discharge chute. The other flange 112 is horizontally disposed and forms a folder blade for one of the bottom flaps 1, Figs. 12 and 15 of the wrapper. On the forward stroke of the pusher block this blade 112 engages first the flap 1 and folds it against the bottom face of the print. Further movement of the pusher abuts the pusher face 111 against the print and carries the print into the discharge chute. The end of the table H has a depression 113 Fig. 3 to accommodate the folder blade 112 and the edge 114 of this depressed portion acts to start the folding of the remaining bottom flap 1 as the print is moved into the discharge chute. This last fold is not tightly pressed against the bottom of the print until the succeeding print is pushed on to the discharge chute and moves the print beyond the depression 113 and the print passes the inner edge 115 of the depression. This last step tightly folds the flap against the bottom of the print and completes the wrapping operation.

As each print is pushed into the discharge chute it engages a pair of stop fingers 116, Figs. 2 and 3, which rise to permit the print to pass underneath and then drop in behind the print and hold it against reverse movement when the pusher is retracted. These stop fingers 116 are pivoted at 117 to arms 118 mounted on the discharge chute, Figs. 2 and 6. These fingers lie in the path of the moving prints so as to be engaged thereby, and they have outwardly turned ends 119 which engage the arms 118 to prevent them from dropping down too far.

The pusher block extension 110 carries two forwardly extending spring fingers 120 Figs. 2, 3 and 4. These spring fingers are long enough so that when the pusher is in retracted position they reach to a point above the print on the elevator and serve as yielding stops to prevent the print from being displaced vertically on theelevator after it reaches the upper end of its stroke. They also hold the prints against displacement while the pusher bar is operating to push the prints into the discharge chute. The side walls 125 of the discharge chute are in the form of flat guide straps which are yieldingly pressed against the ends of the row of prints in the chute by the springs 126 Fig. 2. These springs are positioned between the guide straps and lugs 127 upstanding from cars on the chute table. They are carried on studs 128 which are fastened to the guide straps and extend loosely through holes in the lugs 12'! and carry adjustment nuts 129 at their outer ends whereby the side walls may be adjusted to accommodate the row of wrapped prints. In addition to this there is provided horizontal flat spring straps 130 which overlie the ends of the prints in the row and yieldingly press upon the top faces of the prints to hold them in proper position in the chute. These straps are provided with slotted flanges 131 and are supported by outstanding ears 132 on the chute table. The flanges are fastened to these ears so that the straps can be adjusted. The side walls 125 and the straps 130 cooperate to maintain the row of prints in place in the chute and hold the folds in the wrapper until the prints are taken from the machine by the operator.

The structure shown and described is best adapted to carry out the principles of my invention but it is obvious that my invention may be embodied in other structures without departing from the scope and spirit of the invention and I wish it to be so understood.

I claim:

1. In a butter wrapping machine, the combination of a folding mechanism comprising inflexible movable side members for folding a wrapper against the sides of a print, inflexible end tuckers for folding portions of the wrapper against the ends of a print and mounted on said side members, inflexible movable end flap folders for folding end flaps of the wrapper against the ends of the print, means holding said side members, end tuckers and end flap folders in yielding engagement with the print and wrapper, and means for moving the print and wrapper relatively to said folding mechanism.

2. In a butter wrapping machine, the combination of a folding mechanism comprising inflexible movable side members for folding a wrapper against the sides of a print, each of said side members comprising relatively movable sections, inflexible movable end tuckers for folding portions of the wrapper against the ends of a print and mounted on said side members to be movable with said sections, inflexible end flap folders for folding end flaps of the wrapper against the ends of the print and mounted on said side members to be movable with said sections, means holding said side members, end tuckers, and end flap folders in yielding engagement with the print and wrapper, and means moving the print and wrapper relative to said folding mechanism.

3. In a butter wrapping machine, the combination of a folding mechanism comprising inflexible movable side members for folding a wrapper against the sides of a print, inflexible end l tuckers for folding portions of the wrapper against the ends of the print and mounted on said side members, inflexible end flap folders for folding end flaps of the wrapper against the ends of the print and mounted on said movable side members, means acting on said side members for holding said side members, end tuckers, and end flap folders in yielding engagement with the print and wrapper, and means for moving the print and wrapper relative to said folding mechanism.

4. In a butter wrapping machine, the combination of a pair of yieldingly mounted side folding members each comprising relatively movable sections, end folders mounted on and movable with said sections, and a frame supporting said side members.

5. In a butter wrapping machine, the combination of a pair of yieldingly mounted side folding members each comprising relatively movable sections, end folders mounted on and movable with said sections, end tuckers mounted on said sections and movable therewith, and a frame supporting said side folding members.

6. In a butter wrapping machine, the combination of a pair of yieldingly mounted side folding members each comprising relatively movable secingly supporting the sections of each pair for movement relatively to each other, and means connecting the corresponding sections of the opposing folding members for movement in unison.

9. In a butter wrapping machine, the combination of a pair of opposing side folding members each comprising a pair of sections, means yieldingly supporting the sections of each pair for movement relatively. to each other, means connecting the corresponding sections of the opposing folding members for movement in unison and an end flap folder mounted on and movable with each section of each pair of folding members.

10. In a butter wrapping machine, the combination of a pair of opposing side folding members each comprising a pair of sections, means yieldingly supporting the sections of each pair for movement relatively to each other, means connecting the corresponding sections of the opposing folding members for movement in unison, an end flap folder mounted on and movable with each section of each pair of folding members, and end tuckers mounted on the sections of one of said side folding members.

11. In a butter wrapping machine, the combination of a pair of opposing side folding members each comprising a pair of sections, means yieldingly supporting the sections of each pair for movement relatively to each other, means connecting the corresponding sections of the opposing folding members for movement in unison, an

end flap folder mounted on and movable with each section of each pair of folding members, end tuckers mounted on the sections of one of said side folding members, and means for adjusting said sections relatively to each other.

12. In a butter wrapping machine, the combination of a main frame, a feed table mounted on said frame, a discharge chute mounted on said frame above said feed table, and a unitary folding mechanism positioned between said feed table and the discharge chute and comprising a subframe detachably mounted in said main frame, yieldably mounted side folding members each comprising relatively movable sections carried by said sub-frame, and end folders mounted on and movable with said sections.

13. In a butter wrapping machine, the combination of a pair of yieldingly mounted side folding members each comprising relatively movable sections, end tuckers mounted on and movable with said sections, end folders mounted on and movable with said sections, means for moving a print and a wrapper between said side members,

end tuckers, and end folders whereby the sides and ends of said wrapper will be folded against said print, and means for folding a bottom flap into engagement with the print and for moving I the print into a discharge chute whereby the other bottom flap is folded against said print.

14. In a butter wrapping machine, the combination of a pair of yieldingly mounted side folding members each comprising relatively movable sections, end tuckers mounted on and movable with said sections, means for vertically moving a print and wrapper between said side members, end tuckers, and end folders whereby the sides and ends of said wrapper will be folded against said print, and horizontally movable meansfor folding a bottom flap against said print and for moving the print from the first moving means onto a discharge chute whereby the other bottom flap will be folded against said print.

ARTHUR H. BOILEAU.

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