US1621655A - Box-making machine - Google Patents

Description

March 22, 1927. c BURNHAM 1,621,655

BOX MAKING MACHINE Filed July 29. 1925 9 Sheets-Sheet 1 C. BURNHAM BOX MAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 2 March 22, 1927. 1,621,655

March 22 1927.

C. BURNHAM BOX MAKING MACHINE Filed July 29 1925 9 Sheets-Sheet 5 March 22 1927. 1,621,655

C. BURNHAM BOX MAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 4 ml n 9 Sheets-Sheet c. BURNHAM BOX MAKING MACHINE Filed July 29. 1925 z? I ENTO Q M BY ATTORNEYS.

March 22, 1927.

22 1927, 1 621 655 March c. BURNHAM BOX MAKING MACHINE Filed July 29, 192.5 9 Sheets-Sheet 6 ANN /M S March 22 1927.

C. BURNHAM BOX MAKING MACHINE Filed July 29. 1925 9 Sheets-Sheet '7 March 22, 1927. c. BURNHAM 1,621,655

BOX MAKING MACHINE Filed July 29, 1925 9 Sheets-Sheet 8 1,621,655 c. BURNHAM BOX MAKiNG MACHINE March 22 1927.

Filed July 29, 1925 9 Sheets-Sheet 9 11v ENTOR (Zia-4, M

. BY TTORNEYS Patented Mar. 22, 1927.

UNITED STATES CHARLES BURNI-IAM, OF WASHINGTON, DISTRICT OF COLUMBIA.

' BOX-MAKING MACHINE.

Application filed July 29, 1925.

This invention has relation to that type of veneer box-making machine disclosed in certain former patents granted to me. For example, I refer to Patents 1,119,340, December 1, 1914, and 1,252,545, January 8, 1918. The present invention relates to improved mechanism for folding the thin metal rim-strip into rectangular form for engagement with the rim of the box and also for folding the shooks into box form and fastening the rim thereto. My latest improved mechanism for forming the channel )inding-rim-strip that is handled by the present mechanism is disclosed in my copending application Serial No. 32,814, filed May 25, 1925. My latest improved mechanism for assembling the shooks in the carrier for presentation to the present mechanism is disclosed in my co-pending application Serial No. 54,102, filed September 2, 1925. This rim-forming mechanism and this shook-handling mechanism will therefore not be described in detail in this application, since, as stated, the present mechanism has to do solely with the folding of the rim-strip into rectangular form and folding the shooks into. box form and fastening the box thus folded to the folded rim-strip.

In the drawings Fig. 1 is a rear view of the machine;

Fig. 2 is a view of one end of the machine, part of the casing being shown in vertical section;

Fig. 3 is a perspective view of the mechanism for operating the shutter;

Fig. 3 is a vertical sectional view showing the shutter in working position;

Fig. 3" is a plan view of the mechanism shown in Fig. 3;

Fig. 4 is a horizontal sectional view on the line 44 of Fig. 1;

Fig. 5 is an enlarged plan View, partly in horizontal section, showing the rear parts of the rim-folding mechanism;

Fig. 6 is a vertical sectional view of the same taken through one of the dash-pots;

Fig. 7 is an enlarged plan view of a part of the rim-folding mechanism shown in Fig. 5;

Fig. 8 is a vertical sectional view on the line El -80f Fig. 7;

Fig. 9 is a vertical sectional view on the line 9-4;) of Fig. 7;

Serial No. 46,872.

Fig. 10 is a diagrammatic View showing the side rim-folding members in folded position;

Fig. 11 is a horizontal sectional view taken through the front part of the machine show ing in full lines the front folding members in inoperative position and, in dotted lines, in folded position;

Fig. 12 is a detail side elevation showing one of the front folders in the position shown inv dotted lines in Fig. 11;

Fig. 12 is a vertical sectional view on the line 12--12 of Fig. 11;

Fig. 13 is a front elevation of a machine as shown in Fig. 1;

Fig. 14 is a vertical sectional view on the line 1414 of Fig. 13;

Fig. 15 is a detail vertical sectional view of one of the box-holding forks adapted to receive the box after it is completed;

Fig. 16 is a vertical sectional view on the line 1616 of Fig.10;

Fig. 17 is a vertical section on the line 17-17 of Fig. 10;

Fig. 18 is a vertical sectional view on the line 1818 of Fig. 10.

Referring to the annexed drawings by reference-numerals, 2O designates the rec1procating carriage which carries the side fold ing members of the rim-strip-folding mechanism. As formerly, this carriage is reciprocated from the drive-shaft 21 by a cam 22 and a rocking lever 23, the upper end of this lever being connected to the carriage through the medium of a pair of rods 24. I employ a double cushioning device consisting of a pair of resilient members 25, rubber in the present instance, threaded on said rods 24, each pair of these resilient buffer members being arranged between one of the forked ends 26 of the lever, these forked ends being slidably connected to the rods 24. With this double buffer arrangement, shocks incident to quickly. reciprocating the carriage back and forth are minimized.

To further minimize the shocks of moving the carriage, particularly the return shock, I provide a pair of dash-pots, one at each side of the carriage and each embodying a cylinder 27 affixed to the frame of the machine and having a piston 28 working therein, the rod 29 of this piston extendin out through one head of the cylinder and lying in. a positionto be struck by an adjnstable abutment 30 on the carriage, when the carriage approaches the end of its return stroke. Free air-passages 31 are provided in the forward end of the cylinder 27 and an adjustable restricted air-pas sage 32 is provided at the rear end of the cylinder. A coil-spring 33, arranged in a guide-cylinder 34 formed on the adjacent head of the cylinder, normally presses the rod 29 forwardly, this spring being arranged between the adjacent head of the cylinder and the guide-collar 35 fastened to the rod 29. The operation of these buffers is obvious and need not be particularly set forth. It will be noted that these buffers do'not affect the movement of the carriage until the carriage approaches near the end of its return stroke, whereupon the abutments 30 come in contact with the rods 29. The tube ea and the abutment guide-collar 35' serves to steady and guide the cushioning piston.

At the front edge of the carriage 20 is mounted the central folding member 36 and the two side folding members 37, these two side folding members being pivotally mounted at 38 to levels 39, these levers being pivotally mounted at d0 to the carriage. The central folder 36 is pivotally connected at its ends to the foloer members 37 by means of pivots 37", the forward ends of abutments l1 aiiixed to the side folders being provided with notches a2 for engagement with the stop-pins l3 carried by the box-former, hereinafter describet. As formerly, when the carriage is moved forwardly, the notches e2 engage the posts 43 and then. upon further movement of the carriage, the side wings 37 fold around the box-former, the pivotal arrangement of levers 39 and the pivots 37 permitting this movement to take place.

It will be observed from Figs. 7 and S'that the abutment members ll are rigidly bolted to the top side of the respective folder plates 37 by a pair of bolts 36' and that these bolts also serve to clamp to the underside of the member 37 a bracket-arm 37 which, together with said plates 37, forms a fork for the reception of the pivoted ends of the central folder 36. This forms a rigid, durable and compact structure, well adapted to take the severe strains of very quick repeated operations. The holes through which the pivot-pins 37 respectively pass are elongated laterally, as shown in Fig. 10 at 37 The forward ends of levers 39 normally tend to swing toward each other by reason of their being connected together by a retractile spring 39; the result of the action of this spring 39 and the elongated slot 37 3 is that the side folders 37 have a capacity of yielding away from the central folder upon pressure being applied to them in that direction. This is advantageous in relieving the parts of strain in case the rim-strips pile up on the anvil 80 as they sometimes do, especially in cases where there is a failure in the presentation of shooks to the shook folder mechanism.

The exact alinement of the side folders 37 with the central folder 36 is maintained by a stop-block 39 fixed on each of the levers 39 adjacent to its pivot 38, these stop-blocks being arranged so that when the carriage returns to starting position the base plates of the folders 37 swing back against the front edges of these blocks. It will be observed that the guiding funnel or trumpet 4:5 in my present structure is mounted on the carriage instead of as formerly upon an adjacent part of the machine frame. The advantage of this is that this guide funnel is always maintained in exactly the proper relation to guide the rim-strip let into the channels of the faces of the folders.

Before the carriage is moved forwardly as thus briefly outlined, the previously-channelled rimstrip lais positioned on the front faces of the members 36 and 37, as formerly, these faces being channelled to receive'the rim-strip. The rim-strip is slid into these grooves endwisely through a funnel i5 (affixed to the carriage) which is open along its front face. As the strip passes along into the channels in the members 36 and 37, it passes behind a pair of hooks e6, one being carried by each of the side folders 37, these books serving to hold the rim-strip in the channels after the shutter i7 rises, as more fully hereinafter set forth.

The specific construction of the hooks 4-6 is shown particularly on sheet 5. Each is pivotally mounted on a vertical pivot a3, a coil spring a9 being arranged to swing the hook on this pivot in such manner that it tends to lightly clamp the rim-strip in the groove in the folder. One edge of each hook is bevelled off at 50 to facilitate entry of the rim'strip behind the nose of the hook. Each hook is carried by a bar 51 pivotally mounted on a horizontal pivot 52 carried by the folder wing. Spring means are provided for normally tilting this bar 51 in such manner as to hold the hook 4L6 down in position, these means consisting of a lag 53, a bell-crank 54 and a ret-ractile spring The rear end of thebar 51' is slightly turned upwardly so as to impinge against a cam-roller 56 and depress said rear end to raise the hooks 4:6 out of holding position. This is done after the rim-strip is folded about the anvil carried by the box-former, as hereinafter more fully set forth. The cam-rollers 56 are mounted, as shown particularly in Fi l i, on the clamping-jaws hereinafter described, these cam-rollers being positioned to release the rim-strip at the end of the side folding operation, i. e., after the side folders have folded the rim-strip against the anvil carried by the box-former.

As formerly, the shutter 47 is brought ill) ill)

down to the position shown in Fig. 3, Sheet 2, to close the riui-strip-receiving channel during the passage thereinto of the rim-strip, thus insuring proper positioning of the rimstrip on the folders. F or the purpose of absolutely insuring that the shutter will close in every instance, even after the machine parts are somewhat worn and there is therefore some lost-motion in the parts, ll pro vide means for positively pressing the shutter against the rim-channel, this means being constructed as follows.

A shutter-operating rod 57 is reciprocated, as formerly, by means of a suitable cam arrangement actuated from the main shaft, and the upper end of this rod 57 is pivotally connected to the arm 58 affixed to a shaft A pair of arms 60, extending forwardly, is pivotally mounted on the shaft 59, these arms carrying at their forward ends a pivotshaft 61. The ends of the arms 60 are each confined on the shaft- 59 by means of two fixed collars 62 and 63. The collar 63 is provided with an upstanding; lug 64 carrying a set-screw 65 which, when the shaft 59 is roiated over forwardly, strikes against an upstanding lug 66 carried by a loose collar 67, which is provided with a forwardly-extending arm 68 having a lateral tappet 69 in position to strike a lateral lug 70 carried by the adjacent arm 60. The shutter 47 is affixed to the lower ends of a pair of links 71 mounted on the aforesaid shaft 61. The upper end of each of these links 71 is connected to its adjacent arm 68 by a retractile spring 72, and this upper end of the link 71 is also pivotally connected by a rod 73 to the lug 66. Each arm 60 is provided with a finger 7a carrying a setscrew at its end which is adapted to abut against a stationary stop 75 on the frame, and each of the collars 67 is provided with a forwardlyand upwardlyextending finger 76 which is adapted to strike against a stationary pin-stop 77 carried by the frame of the machine. When the cam-rod 57 moves upwardly and rocks shaft 59, it swings arm 68 downwardly.

The lug 7 O on arm 60 rests on lug 69, and this is the only support that the arm 60 has in the raised position. When 69 moves downwardly, tappet 70 follows it. While the arm 69 moves down, it pulls on spring 72 which is attached to the forward end of the shutter mechanism and pulls said forward end down. The downward movement is controlled by the set-screw on finger 74 and stop 75. lVhen the shutter 47 has been thus brought down to the plane of the rimstrip-channel in the folder members, it is necessary to swing it against the rim-stripchannel to close the channel. This is done by fixed collar 63 and set-screw 65, which strikes lug 66, which moves rod 73 forwardly to rock links 11 on the pivot 61. This brings shutter L7 tightly against the rim-stripchannel. After'the rim-strip is fitted endwisely into the channel, the shutter has done its work andjis then raised in this way; 57

moves rock-shaft which moves tappet 69 up; lug, 7O rests on 69 and is carried up. Collar 67 has a stop-lug 7 6 which rests against pin-Stop 77. The parts are now in normal, raised position, ready for another operation.

After the carriage 20 has moved forwardly and brought the central folding member 36 into position to place the rim-strip 44 against the anvil 80 on the box-former, this central folding member 36 is arrested in its forward movement, while the side folders 37 continue to move forwardly in. a pivotal manner. To permit this relative body movement of the two side folders and at the same time insure alinement of the channel grooves when the folders are in their back position, I connect this central folding member 36 to the carriage in such manner that it may have a resilient independent movement thereon. For this purpose, I employ a pair of telescoping tubes 81 and 82, one being mounted on an upstanding lug 83 in the rear edge of the carriage and the other being affixed to the member 36 and working through a guide lug 83, an expansible spring 84- being enclosed within said telescoping tubes. The forward end of the tube 82 eX- tends through said lug 83 and is held in position by a nut 85. .In this way, after the folding member 36 comes to rest against the box-former, the carriage may continue to move forward to give the side wings 37 the necessary movement; and upon return of the carriage to its back position, the spring 84 will insure the folder members 36 and 37 properly alining with each other.

I will now describe the front folders, namely, the folders which complete the folding of the rim-strip around the anvil 80. This mechanism consists, as formerly, of two wings 86 and 87, each of which is pivotally mounted at 89 and is provided on its face with a rim-receiving-groove and at its forward end with a curved notch 90 for engagement with the front pair of the fulcrum posts 43. When the folders are moved toward the posts 43, the notches engage the 1 same and swing around against the face of the box-former. As the forwardly-projecting ends of the rim-strip have previously been laid in the grooves in the folders, these ends will be folded around against the anvil 80. The mechanism for actuating the folders is such that the left-hand folder slightly precedes the other folder, means being provided whereby the groove-carrying member 87 on the right-hand folder is swung downwardly far enough to cause the end of the rim-strip carried thereby to be sprung under and allowed to snap up into the previously-placed opposite end of the rim-strip.

The right-hand end of the rim-strip is snapped under the nose of the hook 100 carried by the box-former and provided with a spring device 101 for actuating it. The other end of the rim-strip is snapped under a hook 102 carried by the box-former. These two hooks together with the corner-anvils 103 serve to hold the rim-strip in position on the box-former, against the anvil 80, and thus permit the front folders as well as the back folders to be withdrawn from the anvil, leaving the rim-stripin position to be crimped on the rim of the box.

The hook 102 is shown more particularly in Fig. 18. It will be observed that this hook is pivoted in the former at 102 and that its. inwardlyextending end is normally forced upwardly by spring 102", to thus swing the depending hook-end toward the anvil 80, which hook-end is provided with the usual should r for engagement with the outer wing of the rim-strip 4 1- when the rim strip is engaged under the hook. Thus using a springactuated pivoted hook instead of a rigidly-supported hook as formerly is advantageous in that this type of hook is more certain to properly receive and hold the rimstrip 14 when the same is sprung upwardly into the hook. The rim-strips vary slightly in shape, notwithstanding the great care that is used to uniformly shape the strips; this pivoted hook takes care of these slight Qnaccuraeies and makes engagement with the hook a certainty.

The folders 86 and 87 are each pivotally mounted, at 89, on the inner ends of double levers 104 whose out-er ends are pivoted at 105 to slides 106 mounted to slide horizontally in guides 10?, these guides being affixed, each, to a pair of vertically-slidable rack-bars 108 mounted in the frame. These rack-bars 108 are simultaneously moved up and down through the medium of pinions 109 carried by a horizontal shaft 110, one end of which is connected by means of an arm 111 to the upper end of a rod 112 whose lower end enters the casing of the frame and is actuated by a cam mechanism on the main shaft 21. At the proper time, the cam permits a coil-pring 113, on the rod 112, to force said rod downwardly, thereby elevating the guides 10? together with. the folder mechanisms mounted thereon. This elevation of the front folders is necessary in view of the fact that during the operation of the side folders 37, heretofore described, these front folders must be positioned down out of the way. This lifting mechanism comes into action after the side folders 37 have completed their operations and tne ends of the rim-strip are thus swung around into position for engagement by the front folders.

vVhile the front folders are thus being lifted into operative position by the rack-bar arrangement described, they are being pushed inwardly toward each other to accomplish the end-folding heretofore described. This is done by moving the slides 106 inwardly, this movement being accomplished by means of a rod 114 pivotally connected to the slide at 115. The left-hand end of the rod 114; is slidingly connected to an arm 116 carried by a shaft 117, an expansible coil-spring 118 being interposed between a shoulder on the rod 114 and said arm 116 to eliminate jars as much possible. Rod 117 is rocked by means of a bar 119 ailixed thereto and a cama-ctuated rod 120. The other red 11%, attached to the other slide 107, is actuated by an arm 121 affixed to a shaft 122, which shaft is rocked through the medium of another arm 123 attached to a vertical. camactuated rod 12-1. Vfith these mechanisms, the frontfolders are at the proper time reciprocated to cause the final bending of the rim-strip.

As shown in Fig. l, I insert an adjustable coupling 110 in the shaft 110 at a point between the two inner pinions 109 to thus divide the shaft into two sections, rotatively adjustable one with respect to the other; this enables me to nicely adjust the two sections of the shaft independently to thereby insure an exact operation of the front folders; T his coupling 110 consists of a bevelled head 110' formed on one of the shaft sections and a pair of clamping flanges 10 1-, one of which is movable and bevelled to fit against the bevelled head 110. When the bolts are tigl tened up, the shaft sections operate as one; upon loosening the bolts, the shaft sections may be adjusted rotatively with respect to each other and then again clamped up tight.

The pivoting of the levers 10 1 upon the slides permits the front folders carried thereby to swing around toward the face of the anvil 80 after he notches 90 arrest the forward ends of the folders by engagement with the fulcrum posts 13. The folders are maintained in normal position by coilsprings 125 and guide-rods therefor 126. i ldjustment of the fr nt folders so that they will accurately engage the fulcrum posts 13 is obtained for each folder by a set-screw 12? mounted in the slide and adapted to hear at its inner end against the vertical pin 128 carried by the two members of lever 10d and extending through a vertical slot in the body of the slide. A cavity in the slide encloses coil-spring 129 which serves to guide the stop-pin 128 normally pressed against the set-screw. The body of the slide is slotted to permit forward and backward swinging of the levers 104 with respect to the slide body.

When the right-hand folder, 87, is swung around toward the box-former, it is necessary to tilt its forward end downwardly so that the ends of the rim-strip carried thereby shall be tipped down under the previously-folded end at the other side. I accomplish this by a cam-toe 130 on the forward end of the folder, positioned to ride under a cam'131 Elli'lXGCl. to the lower end of one of the adjacent crimping-levers hereinafter referred to. To permit the folder 87 to thustilt downwardly at its forward end, I pivot the same on a pivot 132, a spring 133 being employed to hold the folder in its normal up position.

Referring again to Figs. 11, 12, 12, 12", 12" and 12": it will be seen that the rimgroove member 87 consists of a flat plate pivoted to the face of the main body 87 of the folder by means of the aforesaid pin 132 and that the cam-toe 130 is a'liixed to the forward end thereof. The operating face of the cam-toe is inclined upwardly and to left, while the co-acting face of the cam is inclined outwardly toward the right, as particularly shown in Fig. 12"; the object of thus oppositely inclining these cam contacting faces is to utilize these members in exciting a pull on the abutment block 43 against the fulcrum-pin 43 during the time the folding of the rim-end is taking place; this insures an accurate positioning of the folded rim-end, as is obvious. To still further insure accurate positioning of the tilting plate 87', I provide the same with an upwardly-facing shoulder 87 which is adapted to abut against an outwardly-facing shoulder on the part 87, these shoulders being held in normal-contact by means of the aforesaid spring 133. To assist in guiding and holding the member 87 in proper position on the part 8'4", I provide the toe 130 with a rearwardly-extending lug 130 which engages behind an adjacent lug on the member 87; and to still further guide the swinging member 8?, I form on the adjacent edge of the member 87 a lug 87 which overlaps the pivoted end of the'part adj scent its pivot 132. The rim-groove is foiined in a separate metal bar 87 which clamped to the face of the bar 8'? by means of a clamp-plate 87 The two veneer box shooks to form each box are delivered to the machine in crossed relation, as formerly, by the usual step-bystep rotary turret carrier 150, the shooks being deposited on the carrierby means of a pneumatic pic er mechanism illustrated in my former patents and also, in its latest form, in my co-pending application Serial No. 54,102, filed September 2, 1925. The present carrier is substantially the same as my former carrier except that I provide a nio'e eticient means 'for receiving and hold- .he'ci ossedshook blanks-"151. Instead I ingle 1i a at eaclifofthe four sides of filer engaging the ed'ges 'of' tlie shock, I provide, as shown particularly in the 131 upwardly and outwardly.

Fig. 14, a series of flanges 152 arranged on an oblique or slightly conveXed line inclining With this arrangement of flanges or notches, I have experienced less trouble on account of slight variations in thelength of shooks a slightly shorter shook will be forced down to a pair of the lower notches, whereas a slightly longer-shook will engage a pair of notches a little higher. 2

From an inspection of Fig. 14, it will be. ol'iserved th at when each shook is jammed into the serrated holding-lugs 152, it convenes downwardly until it upon a stop-lug 152 projecting inwardly from the footof the serrated lug. It will be observed that one pair of these stop-lugs 152 is thicker than the companion pair, to bring their-ar, resting faces in a higher plane; the object of this is to always insurestopping the second shook before it comes in contact with the previously-placed shook, to thereby prevent the latter shook from being pushed out of the carrier.

The carrier delivers the crossed shooks between the usual lower plunger 153 and the usual box-former 154, which latter is mountedon the lower end of a vertically-reciprocable post 155. The plunger 153 carries the folder-wings 156 pivotally mounted at 157. This plunger is adapted to move upwardly and assist the previously-lowered box-former in centrally clamping the pair of crossed shooks while the foldenwings 156 simultaneously fold upwardly the four sides of the box; The folding operating of the wings 156 is accomplished by means of pivoted levers 158 whichare actuated as formerly. The mechanism for reciprocating the plunger 153 is not illustrated in this application, as it is substantially the same as in my former patents. In the present application, I illustrate an improvement of the-folderwings 156. This consists in applying to the free edge of the wing a spring-pressed hp 159, held yieldingly against the lower bevelled edge of the folder-wing by a spring 160. I have found in practice that this yielding pressure lip 159 readily accommodates itself to shooks of different thicknesses and insures the positioning of the upper edges of the folded shook in alinementwith the downwardly-opening rim-channel 44 which atthat time is on the anvil 80. I

lVithin the box-former 154 is mounted a resser-foot 161 which is slidingly mounted within the post and is actuated by mechanism disclosed in my former patent. At the beginning of the box-folding operation, this presser-foot is forced downwardly toward the rising plunger 153a11d serves to clamp the crossed box shooks against'the plunger and to hold the same therea'galinst while the upfol'ding wings .156 are' aeti iig. To insure a resilient clamping action and also to insure ejection of the box from the box-former after the crimping of the rim 44 is completed, I mount upon the presser-foot 161 the usual spring-actuated ejector 162. This ejector is constructed as formerly, except that I provide a more efficient means for arresting its downward movement against the action of its springs; it is constructed as follows: The foot-piece 162 is provided with a central tube 103 which 62(- tends up into the hollow shaft which carries the presser-foot 161, and in the upper end of this tube 163 I thread an adjustable stoppin 164 whose lower end abuts against the cross-pin 165 mounted in the box-former and extending through longitudinal slots in the tube 163. With this device, I may very pos itively and nicely regulate the amount of movement of the resilient clamp-ejector 162. It will be understood that after the box shocks are thus clamped together on the plunger 153 and the wings 156 are actuating, both the plunger and the Presser-foot 161 move upwardly far enough to bring the folded members of the box against the usual yielding side walls carried by the box-former up into the channel of the rim-strip 44. Continned movement of these parts together with a slight upward movement oi? the boxformer brings the rim-strip 44 into horizontal alinement with the usual crimping-jaws 167, whereupon the crimping operation takes place in the usual manner. The plunger 153 and the presser-foot then descend, thus stripping the b0); from the former, and the action of the ejector 162 insures the box being delivered off the presser-foot 161, whence it drops into the forked lingers 168 carried by the carrier. In the next rotativestep of the carrier, the completed box is moved to a po sition where it may be conveniently ejected from the carrier. Instead of using rigid basketdiolding forks 168 as in my former structures, I pivot the fork at 169 (see Fig. 15) to a horizontal pin 170 mounted in the frameof the carrier and provide a. contrac- V tile spring 171 for normally holding the fork upwardly. When the shooks are ammed into the carrier, these forks yield downwardly, as shown in Fig. 15, to a position out of the way; when the sides of the basket are folded upwardly, these forks'spring back into proper position for holding the basket when it is completed and lowered into the carrier. A stop-pin 1'72 limits the upward movement of the fork.

7 By inspection of Figs. 15 and 15, it will be observed that the supporting pin 170 is adjustable not only inwardly and outwardly,

but also rotatively within its support, this being accomplished by means of a spring clamp 170 which is adapted to clasp the pin 170.

The crimping-jaws 167 are actuated, as

formerly, by a sliding sleeve 17 3 mounted on the central tube 174 carrying the post 155. This sleeve 173 is actuated from the cam-shaft of the machine, as formerly. Upon upward motion of this sleeve, each of the toggle members 17 5 swings outwardly the upper end of the lever which carries the crimpingjaw, this lever being pivoted at 17 6 on a stationary part of the machine and being in the present instance constructed of two parts as follows: The main part 177 carries a crimping-jaw 167 and the other part 178 is in engagement with toggle member 175 and is pivoted at 179 to the aforesaid main member 177. A screw bolt 180 connects these two parts of the lever, and interposed between these two parts is a rubber cushion 181. The object in thus making the crimping lever a two-part appliance and in introducing a cushioning element therebetween is to not only reduce shock but also insure a complete and accurate crimping of the rim-strip 44.

The rim-strip corner-a-nvils 103 are not stationarily mounted as in my former construction, but are movably mounted in the following manner: Each anvil is slidingly mounted in the box-former head so as to move radially with respect thereto. An adjustable screw stop-pin 182 limits the inward movement of the anvil 103 and the adjacent fulcrum post 43 limits its outward movement. The stop-pin 182 is carried by a shoe 183 which straddles the shank of the anvil 103 and has a lost-motion connection therewith through the medium of a pin 184 carried by the shoe 183 and a lug 185 carried by the shank. A short rocking lever 186, pivoted at 187, has a pivotal connection with the shoe 183 at the lower end of the lever. The upper end of the lever carries a roller 189 which engages a cam-member 190 affixed adjustably to the frame of the machine by means of a bolt 191 working through a slot 192 formed in said cammember. The inner face of the cam-member 190 is so shaped that when the former head is in its lower position, as shown in Fig. 16, the cam-r ller 189 will lie against the inwardlyprojecting surface of the cam and the anvil 103 will" thus be held in its projected position, i. e., in the position that it occupies when the rim-strip 44 is folded against it. The parts remain in this position until the box is elevated into crimping position, whereupon the cam-roller 189,

runs down off the cam surface and thus draws the anvil 103 inwardly far enough to release the crimping strip 144, thereby permitting the easy removal of the rim-strip from the four corner-anvils 103 when the.

completed box is lowered to ejecting position. This prevents the box sticking to the corner-anvils 103. The anvil-actuating levers 186 are each held against the cam face of part 190 by means of a retractile spring 193.

What I claim as new is:

1. In a machine of the type set forth, a carriage carrying the rim side folders and means for reciprocating said carriage toward and from the basket-former, said means embodying a rocking lever and a double buffer connection between said rocking lever and the carriage adapted to cushion the movement of the carriage on its advance stroke as well as its return stroke.

2. In a machine of the type set forth, a carriage carrying the rim side folders and means for reciprocating said carriage toward and from the basket-former, said means embodying a rocking lever and a double bufler connection between said rocking lever and the carriage adapted to cushion the movement of the carriage on its advance stroke as well as its return stroke, said double buffer connection embodying a pair of rods affixed to the carriage and having a slidable connection with said levers, buffers on the rods in front of the lever and also buflers on the rods at the rear of the lever, for the purpose set forth.

3. In a machine of the type set forth, a carriage carrying folding members, means for reciprocating the carriage, and means for bufling the return stroke of the carriage embodying a dash-pot device at each side edge of the carriage.

4. In a machine of the type set forth, a carriage carrying folding members, means for reciprocating the carriage, and means for bufling the return stroke of the carriage embodying a dash-pot device at each side edge of the carriage, each of said dash-pot devices embodying a cylinder affixed to the frame of the machine, a piston working 111 said cylinder having a rod extending out through one head of the cylinder, a spring for normally advancing the piston, and a pair of abutments on the carriage adapted to impact against the forward end of said rods when the carriage returns.

5. In a machine of the type set forth, a reciprocating carriage and means thereon for folding the rim-strip around the formeranvil embodying a pair of side folders channelled to receive the rim-strip, a spring-ac-- tuated hook on each of saidside folders, means whereby each hook is normally held in working position with its nose across the channel and normally swung laterally toward the channel, and means on the frame for automatically shifting said hook out of working position after the completion of the folding operation, mainlamaqh n of I re p ocating m ies e am ss-1; t mes {f ding-t is-..main a u s theiorna ranvil embodying a pair of side folders chanthe. type forth,

mounted on said other member, and a spring for swinging said hook member laterally to swing the nose of the hook toward the channel, for the purposes set forth.

7. In a machine of the type set forth, a reciprocating carriage carrying folding members having a rim-receiving open channel in their faces, and means for automatically closing said channel and holding it closed untilthe rim-strip is inserted there? in endwisely, said means embodying a shutter extending substantially the length of the channel, means for automatically positioning said shutter to close the channel, and devices for automatically pressing said shutter against the channel members, for the purpose set forth.

8. In a machine of the type set forth, 1. 1

reciprocating carriage carrying folding members having a rim-receiving open channel in their faces, and means for automatn cally closing said channel and holding it closed until the rim-strip is inserted therein endwisely, said means embodying a sl'iut'ter ext-ending substantially the length of the channel, means for automatically positioning said shutter to close the channel, and devices for automatically pressing said shutter against the channel members, said latter means embodying a return spring and devices for tensioning the same through the medium of the devices for positioning the shutter alongside the channel.

9. In a machine of the type set forth, a carriage carrying rim-folding devices havlng an open channel on their faces to endwisely receive the rim-strip, a shutter extending the length of said channel and adapted to close the open side thereof while the rim-strip is passing thereinto, and means for actuating the said shutter embodying a rock-shaft, arms loosely pivoted thereon, shutter-carrying levers pivotally mounted on the ends of said arms, means actuated from the rock-shaft for bodily depressing said levers to bring the shutter into horizontal alinement withthe channels, andmeans actuated from said rock-shaft for positively forcingsaidshutter against the channel members to thereby, closefthe' channel.

a.eeaeh eaietitlefli t at ii i.

. iiee r ea int rmarriage F f folding members, a central mtwo side pair of front rim-folding members normally below the plane of operation, and means for raising said members into position for operation and for actuating them embodying a slide for carrying each member, a guide for each slide, and means for vertically raising and lowering said guide on the machine frame.

12. In a machine of the type set forth, a pair of front rim-folding members normally below the plane of operation, and

' means for raising said members into po h tion for operation and for actuating them embodying a. slide for carryingeach member, a guide for each slide, and means for vertically raisingand lowering; said guide on the machine frame, said means for raising and lowering the two guides embodying a rock-shaft carrying pinions, apair of.

rack-bars carrying each guide, and means for automatically actuating said shaft.

13. In a machine of the type set forth, a pair of front rim-folding members normally below the plane of operation, and means for raising said members into position for operation and for actuating them embodying a slide for carrying each member, a guide for each slide, and means for vertically raising and lowering said guides on the machine frame, means being provided whereby the slides are automatically moved inwardly to cause the folder members to operate after they are raised to their operative plane.

14. In a machine of the class set forth, a pair of pivoted front rim-folding members and means for swinging them around against the front face of the anvil to bring the ends of the channel rim into overlapping relation, said means embodying a canrtoe on one of the members and a cam on an adjacentpart of the machine whereby said folding member is tilted to bring the end of 'the rim-strip underneath the previouslyfolded rim-strip end.

15. Ina machine of the class set forth embodying a former, corner-anvils carried by the former, each anvil being slidably mounted in the former so as to move up and down therewith, and means whereby all the anvils are withdrawn inwardly to released position when the former is raised.

16. In a machine of the class set forth embodying a former, corner-anvils carried by the former, each anvil being slidably mounted in the former so as to move up and down therewith, and means wnereby all the anvils are withdrawn inwardly to released position when the former is raised, said means embodying a cam on the machine frame and a rocking lever on the former.

17. In a machine of the class set forth embodying a former, corner-anvils carried by the former, each anvil being slidably mounted in the former so as to move up and down therewith, and means whereby all the anvils are withdrawn inwardly to released position when the former is raised, said means embodying a slidable shoe mounted in the head in engagement with the anvil and carrying an adjustable stoppin, a lever pivoted on the head and having one end in engagement with said shoe, a cam for engaging the other end of the lever, and a spring for holding the latter end of the lever in engagement with the cam.

18. In a machine of the class set forth, a carriage carrying a central rim-folder and two end run-folders pivotally connected to the central folder, a limited lost-motion being provided for between each end folder and the adjacent end of the central folder, and spring means for normally taking up this lost-motion and permitting the end folders to yield away from the center folder, for the purpose set forth.

19. In a machine of the type set forth, a carriage carrying a central folder and two end folders, arms pivoted to the carriage and also pivotally and movably connected to the end folders, and a spring connecting these arms to normally draw them together at the ends carrying the end folders, whereby the end folders may yield away from the central folder, for the purpose set forth.

20. In a box machine of the class set forth, areciprocating carriage carrying articulated folders having rim-receiving alined channels, and a guiding funnel for said channels carried on said carriage.

21. In a box-folding machine of the type set forth, a reciprocating carriage carrying three rim-folding members and means for causing the two outer members to fold forwardly when the carriage is moved in that direction, said folding members having rimholding alined grooves, a rim-holding hook carried by each oneof the end folders, and means for releasing said hooks when the folders'reach their final position.

29.. In machine of the type set forth, a pair of front folders and means for elevating them into operative position with respect to the box-former embodying a shaft and pinions thereon, said shaft being divided into two sections, andmeans being provided whereby these sections are rotatively adjustable with respect to each other.

23. In a machine of the class set forth, a box-former carrying a rim-strip anvil, a pair of hooks carried by the former one adapted to receive and hold the first end of the rim-strip that is folded against the anvil, said hook being pivotally mounted on the former in position to swing toward and from the anvil, and means being provided for normally swinging said hook toward the anvil, for the purpose set forth.

2%. In a machine of the class set forth, a pair of front folders one of which embodies a swinging folder carrying a rim-groove carrying member pivotally mounted on the face of the folder, a spring for normally holding this member in position, and cam means for swinging this member downwardly during the act of folding, this cam means embodying two cam members whose contacting faces oppositely incline to thus insure the folder being pulled against the fulcrumpin during the act of folding.

25. In a machine of the class set forth embodying a box former, a front folder and means for raising and lowering it and moving it inwardly and outwardly with re.- spect to the box-former, said folder embodying a swinging body member, a rimgroove carrying plate pivotally mounted on said body member, a lug carried by said plate and engaging behind a co-acting lug on said body member, a lug on the'body member overlapping the face of the plate, a spring operating to hold said plate in its up position, and cam members for depressing the free end of said plate during the act of folding.

In testimony whereof I hereunto afiix my signature.

CHARLES BURNHAM.

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