US1600364A - Machine for folding the edges of textile and similar articles - Google Patents

Description

Sept. 21,1926. Y 1,600,364

. E. B. RQBY MACHINE FOR FOLDING THE EDGES 0f TEXTILE AND SIMILAR ARTICLES Filed June 22. 1923 a sheets sne'et fiaww 5.304

a Attorney Sept. 21 1926. 1,600,364

. E. B. ROBY MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILAR ARTICLES Filed June- 22. 1923 a sheets-Sheet 2 @W Atlomey Sept. 21 ,1926; 1,666364 E. B. ROBY MACHINE FOR FOLDING THE EDGES 01" TEXTILE AND SIMILAR ARTICLES Filed June 22. 1923 8 Sheets-Sheet, 3

, Ir wenlor 3 mam Q Attorney Sept. 21 ,1926. a i 1,600,364

E. B. ROBY I 1 MACHiNE FOR FOLDING THE EDGES 0F TEXTILE AND SIM- 111KB ARTICLES Filed June 22. 1923 I a She ts-She'et 4 Inventor EMF 5- my Sept, 21 1926o OF 'rsxnns AND SIMILAR ARTICLES a sheets-sum 5 MACH-HIE FOR FOLDING EDGE Filed June 22. 1923 Inventor Ema w B. Eoy

Allomey 9% ti. mmx

Sept. 21 1926. E j RUBY MACHINE Fon FOLDIBG. THE mas 0F TEXTILE Am) SIMILAR ARTICLES 7' Filed Juner 22. 1923' 8 Sheets-Sheet 6 Q I II flllllllllll Ill fimuuuuun ynumunn Sept. 21, 19261 B. Row

MACHINE FOR FOLDING THE EDGES OF TEX-TILE AND SIMILAR ARTICLES Filed June 22. 1923 s sheets Shet v A TicqiE- Inventor I B fi'am/a/vf 5 Bay Attorney Sept. 21,1926. 1,600,364-

' E. B. ROBY MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILAR ARTICLES Filed June 22. 192:5 a sheets-$11601; a

a I xi 1/? III III

I 0 Edward B.%Z1/

a Atlofney Patented Sept. 21, 1926.

' UNITED STATES PATENT one! EDWARD B. ROBY, OF TROY, NEW YORK, A SSlG NOR TOS. AND ;R. FOLDING- MACHINE COMPANY, INC., OF GREENISLAND, NEW Y ORK, A CORPORATION OF NEW YORK.

MACHINE FOR FOLDING THE EDGES OF TEXTILE AND SIMILAR ARTICLES.

Application filed June 22, 1923 Among the principal objects which the present invention has in view are: to adapt a machine of the character mentioned for interchanging parts for various sizes and patterns of the article being manufactured; tofacilitate the removal of thearticle in question fronithe machine; to so' lay the material being "folded as to .avoid the formation of roughened or padded sections in the completed article; to provide gages whereby the operation of-the coordinated elements in the machine may be pre-arranged; to provide means for heating the folded edges during the period of pressure applied thereto for setting the fold; and to perfect the construction and arrangement of a machine of the character mentioned for reducing the friction and wear in the parts thereof.

Drawings.

Figurel is a front elevation of the machine constructed and arranged inaccordance with the present invention, the ma- Figure 4 is a top plan view of the bed, plate of the machine showing the pressure elevator.

Figure 5 1s. a horizontal section of the the line 55 in Fig. 1.

Figure 6 is a'detailed view on enlarged scale showing the lifting mechanism with the SOtlOD being taken IQSS frame, SGCtlOll b8111 taken as 021 Serial No. 647,094.

Figure 10 is a top plan View of parts of the mold.

Figure 11 is a vertical section of one of the cam shifting heads with which the foldthe line1212 in Fig. 11.

Figure 12 is a detailed View in plan of one 01- the rotary cam guides'with which the machine is provided.

Figurell is a vertical section of the prime mover with which the press is pro 'vided, the section being taken on the line 14 1et in Fig. 15.

Figure 15 is a,horizontal section of the same. the section being taken on theline 15-15 in'Fig. 14..

Figure 16 is a vertical section of the valve head with which the prime mover is provided the section'being taken on the line 1616 in Fig. 14.

F igure-17 is a detailed view of a portion of one of the die members constructed and arranged to upset and turn in the corner of the article being handled.

Figures18, 19, 20, 21 and22 show corner sections of the article, being handled in the -progressive steps of'folding and pressing the edge thereof.

Figure 23 is a side view on enlarged scale of the die head.

Figure 24 is a top plan view of the same.

Figure 25 is a longitudinal section of the same, the sectionbeing taken as on. the line 2525 in Fig. 24.

Figure 26 is a cross section of the same,

v as on the line 2626 in Fig. 23.

Figures 27 and 28 are detailed views of die sections and means for holding the same in service; the first mentioned figure being partly in section to show the interior construction thereof. a

Figure 29 is a top plan view in detail of the die head supporting arm.

Figures 30,31 and 33 are detailed views of fragments of a collar the edge of which. is turned by the herein described machine showing the construction of the inner corners of an article being constructed and the method employed in constructing the same.

Figure 32 is a sect-ion of the article shown in Figure 31, the section being taken on the line 3232 in said Figure 31.

Description.

In the drawings there is shown a machine embodying the present invention as adapted for folding the edges of mens collars preliminary to sewing the same, and more particularly the invention relates to improvements in the construction shown in Patent No. 1,260,060 granted me under date of March 19, 1918 for folding machines, to which patent cross reference is here made. The style of collar to manipulate which the machine is designed has an outline correspending to the die shown in Fig. 2a of the drawings as well as to the molds for receiv- ,ing the same which is supported on the bed plate 51. The bed plate 51 is mounted in the well 52 to be elevated therein by the levers 53 at the opposite ends of the said plate. The levers 53 as can be seen best in Fig. 6 of the drawings are each provided with a short arm 54. The long arm of the lever 53 is operatively connected by the adjusting screws 55 with the yoke 56 as shown best in Figure 1.

The yoke .56 is normally supported by a cushion spring 57 so that the levers 53 are held in their inactive position. The levers 53 are bifurcated at their ends for forming bearings for the rocking nut 58 and for the wheels 59. Intermediate the wheels 59 is disposed a leaf spring 60, the free end of which bears against the lower edge of the webbing flange with which the plate 51 is provided. While the opposite end is made fast by means of a bolt 61 to the lever 53, intermediate the ends of the spring a screw 62 is disposed in the lever 53 for the purpose of varying the tension on the spring 60.

In the inoperative relation of the plate 51 it is supported by the springs 60. lVhen the levers 53 are rocked on their fulcrum 63, the wheels 59 engage the pendent flange of the plate 51 and thereafter positively elevate the said plate in proportion as the yoke 56 is depressed.

The yoke 56 is depressed by the operation of the piston 6 -1 in the power cylinder 65. The operative connection between the piston 6 1 and the yoke 56 is formed by the piston shaft and set collar 67, the latter being mounted on the rod 68 at will and'by means of a set screw 69.

The power medium preferably employed in the machine herein disclosed is compressed air.' This is supplied by the pipe 7 O communicating between said port and the valve chamber 71. The exhaust pipe 75 is connected with the port 76 which is exposed by the valve 77 at the extremes of travel of the said valve and by means of the passage 78, usual to the construction of reciprocating slide valves. This construction can be best seen in Figures 1 1 and 15 of the drawings.

As can be best seen in Fig. 2 of the drawings, a dash pot 7 9 having a perforated piston 80 mounted therein controls or quiets the operation of the piston- 64 and parts connected therewith. The piston shaft 66 has connected therewith the piston rod 68 to which is permanently attached the piston 80, a gland packing 81 preventing the leak therefrom of a suitable liquid with which the dash pot 79 is provided.

As can be best seen in Fig. 2 of'the drawings when disposed inactively the yoke 56 and the portion thereof through which the rod 68 extends is spaced apart from the collar 67 to provide a predetermined amount of lost motion in the operation of the machine prior to the actual rocking of the levers 53. During this period, or in correspondence with the lost motion, the levers 82 and 83 are rocked on their pivots 841 and in the order named.

As will be seen by reference to said Fig. 2, the opposite sides of the shaft 66 ad jacent the cylinder and where the same extendsv through the lower head thereof, the said shaft has a relatively short recess 85 and a relatively long recess 86. In the short recess 85 a head 87 on the lever 82 rests while in the long recess 86 a similar iead 87 belonging to the lever 83 deposes. The result of this construction is that immediately the piston 64 and the shaft 66 begin their downward movement, the lever o2 is rocked on its pivot 84-, the head 87 being forced out of the recess 85. This effect is consummated and the free end of the lever 82 which is operatively connected by a link arm 88 is elevated to its full movement before the head 87 of the lever 83 is similarly forced from its recess 86 to be rocked so that the free end thereof and the link arm 88 with which it is connected in turn elevated.

It is subsequent to the complete elevation of the link arms 88 and parts associated therewith that the collar 67 engages the yoke 56 which is thereafter depressed by the continued movement of the piston 64 and parts associated therewith.

As explained, the rocking of the levers 53 operate to primarily compress the springs 60 and thereafter by the wheels 59 force the bed plate 51 upward with full force to compress the edge of the collar being treated, the edge of which has in the meantime been folded. 1

By observation of Fig. 2 of the drawings mam it will be seen that the link arms 88 are each providedzwitha hollow open ended tubular head'89 The heads 89.as will be seen in F ig.

2 ofthe drawings have a squaredrear extension 90 guided by the flanges 91 of'thebracketplate 92. Movably mounted in each ofth'e heads 89 are ends of'levers 93,fthe opposite ends of which are bifurcated to form yokes having disk. ends 94: fitting into the grooves in the nuts95 whichare slidably mounted on the rods 96 as best seeninFigures 1,11 and 12 of thedrawings. The rods 96 have screw-threaded sections at the lower ends whereon are mounted. the nut and lock-nut 97 and98, respectively. The disposition of' the nut 97 regulates the-amount of lost' motion provi ded for the levers 93when rocked by. the link arms 88, and levers 82 and 83 respectively. I V Fromthe'foregoing it willbeseen that as eachof'the link arms 88' and the heads 89 connected therewith are elevated,.the nuts 95 are depressed until'they engage the nuts 97-. Thereafter the nuts 97. and parts connected therewith are depressed to the end that the sliding. heads 99 and parts associated therewithare moved in accordance with the direction to which the cam arms 100 are turned;

Asis seen best in Fignres 11' and- 12, the arms100 are rigidly connected with shafts 101 which are reciprocatively mounted in rotary tubular. extensions 102 of the slide plates: 103. The pl'ates103, as best seen in Fig. 13'of the drawings, have bolting flanges 104. to receive the. guard rails 105, which hold the heads 99 on'theplates 103'. In Fig. 13 ofthe drawings may, also be seen the bore 106 provided for the shaft:101 and an offset recess 107 to receive the arms 100 when depressed atthe workingv position as shown in Fig. 11 of the drawings. I

It will be noted by reference to Figures 1 and 2 ofthe drawings that the levers 93 are disposed in pairs, each pair operating simultaneously to elevate or depress the arms 100 connected therewith. It will also be understood from .theforegoing description and as seen best in Fig. 2*that the pair of levers 93 and the link arms 88 connected therewith at the back of the machine, are. operated in advance of the levers 93 at the front of'the machine. This precession of the operation at the rear ofthe machine results in folding the edge of the collar turnedtoward the rear of the machine in advance of a similar operation on the edge. ofthe collar turned: toward the front of the machine.

The collar above referred to is blanked or cut from .a suitable material and in accordance with the pattern the dimensions where of are sufiiciently greater than the die shown -in Fig. 24 of. the drawings, to. permit folding the edge over the said die to form a; hem

for the collar which may subsequently be lever 128 is with; a foot treadle 130 which construction oan be best seen in F ig; 2 of the drawings. To the arm 126 iswattached a pull spring 131, which normally dpresses'the. free end shownin Fig. 2eis preferably formech by end sections 108 and: a middle section. 109;

Said'sections are operatively connected with spindles 1 10 as'bes't seen in F igures'26'and 28' oftli'e drawings ,the said spindles being each provided with locking nicks 111 101" engagement by-the springs 112 as can be best seen in" Fig. 24' of the drawings. The spindles '110 are provided with foot plates 113 to which the said sections 108 and-109 are removably attached bymeans of-clips 11 1. By this arrangement of the sections 108 fand109 a'variety of shapes may be, employed, in connection with the present machine. V p The springs 112m mounted on; small blocks 115, the ends-of the'saidspringsresting in edge opening slots116inthe-endsof said. blocks. The slots'116 extend through the walls of bores 117 in the blocks provided to receive the" spindles 110. In the working position of thespindles and the blocks the'nicks 111* register-with the slots 116 so that the endsof the springs 112 rest within the nicks lll-thereafter forming an efficient lock to'prevent' the withdrawal of the said spindles from the blocks 115. Thecenter block 115 connected to the'middle die section 109 is rigidly secured to a channel bar 118 by. means ofaqscrew 118, as best in Figures 2"ai1d j 29is'prefer'ably mounted on" the shaft"120',' the bearings whereof are formed"in-brackets 1'21. T-ho arm11-9 is held in operative position primarily. by the arm 122 and the compression spring-123' which rests between the, arms 119"and"122. The

arm 122 is pivoted on the shaft 120' and has a'rearwardextension at theend whereof'is a.foot plate.124.' V, I

The foot plate 12%F'as' is shown best in Fig. 2 of the drawings is interposed in the path of the roller 125 mounted at the end of the arm 82" which as previously stated is raised by the movement of the piston 64 and in advance of the arm'83. The shaft 120 to which the arm 119 is rigidly secured is operating. rod 127 is connected that is at tached to the footoperated lever128. The pivoted at 129 and is provided of'the arm 126and the free'end 'of the level 128. In this position the shaft 120 is rocked to dispose the arm 119 and parts associated therewith including the die sections 108 and 109, in the raised position leaving the molds opening on the bed plate 51 free for the introduction of the cloth blanks from which the collars are constructed.

From the foregoing it will be seen that when the operator places his foot on the treadle 130 to depress the same, he rocks the shaft 120 and the retaining arm 119 into position where the die sections 108 and 109 press the cloth into the mold to rest on the bed plate 51. At the same time the back of the arm 126 impinges upon the setscrew 132 on the arm 122 which rocks the said arm 122 to the position shown in Fig. 2 of the drawings. If now power he applied to move the piston 64 it. will be seen that the first result of the movement of the said piston 64 will be to introduce the end of the arm 82 and the roller 125 carried thereby in the path of and in engagement with the foot 124 of the arm 122. From this it is obvious that thereafter the die head at the end of the arm 119 is held firmly against the subsequent pressure imparted by the bed plate 51 when the same is elevated by reason of the engagement of the nut 67 with theyoke 56. It will further be observed that in accordance with the tension of the spring 123, the pressure is maintained on the arm 119 and the die sections 108 and 109 carried thereby.

The valve 77 is moved by the rod 133 which is connected by means of a pin and slotted end to the lever 128. The slot provides for lost motion in the lifting of the of the edges of the cloth sections 108 and 109 over die sections 108 and 109 as rod 133 sufiicient to rock the arm 119 to retaining position. rod 133 moves the valve 77 to expose the port 72 with the result that compressed air is delivered above the piston 64'which thereafter is depressed as rapidly as the dash pot 79 and parts associated therewith will permit, resulting successfully in the folding held by the die the said. dies and subsequently applying pressure thereto from beneath by elevating the bed plate 51. The folding of the edges is accomplished by first upstanding the material around the the material is forced upon the bed plate 51 by the operation of the retaining arm 119, the channel bar 118 and the die sections above-mew tioned. In this operation the material is forced downward through the mold formed by the heating plates 134 and the folding sections 135, 136 and 137 to rest on the bed plate 51 in the mold formed by the mold plate 138. After the raw edge of the ma- I terial is placed thus upstanding, it is folded over the; die sections 108 and 109, the foldin; sections 135, 13351151., 137 being shifted Thereafter the lift of the.

toward the center of the die for this purose.

The folding sections 135, 136 and 137 rest snugly on the overturned material above the die sections 108 and 109. The sections 135, 136 and 137 are thus moved in correspondence with the movement of the cam arms 100 and the sliding heads 99 operativelyj connected therewith. To this end the plates 135, 136 and 137 are provided with upstanding stud posts 139'and 140. As shown best in Fig. 3 of the drawings the in the heating plates 134. The stud posts 139 and 140 are operatively connected with shifting bars 142 which are nected'to the brackets 143. The brackets 143 as best shown in Figures 11 and 12 are provided with collars 144 pivotally connected with the circular turret 145 on the sliding heads 99. The posts 140 are fixedly attached to the ends of the bars 142, to move in correspondence therewith. The bars'142 are maintained in parallel'relation to the swing bars 146 and to the work being performed, by links 147 which as shown best in Fig. 3 of the drawings, are pivotally attached to the bars 142 and 146 and are of equal len h. I

From tie foregoing it will be observed that when the sliding heads 99-are moved, the cam arms 100shift the brackets 143 toward the center of the machine in correspondence with theangles of inclination of the said cam arms 100, the bars 142 being rigidly attached to the brackets 143 by the bolts 148. The said bars 142 are moved in for locking the extensions 102 in adjusted position. To assist in the adjustment the plates 103'have pointers 150 which extend over and register with the calibrations 151 provided on the bosses 152 of the bed plate of the machine.

The plates 134 are heating elements 153. 153 areconstructed in accordance with any approved design and are preferably placed in the plates 134 adjacent the edge of their supplied with electrical The heating elements posts 139 protrude through the openings 141 rigidly concentral opening which corresponds to the shape of the assembled die sections 108 and 109 and to the opening in the mold plates 138 to which the said heating plates 134 are rigidly attached by the stud screws 154 shown best in Fig. 10 of the drawings, the said heating plates having perforatiens 155 through which the said stud bolts extend when the parts in the machine are assembled.

It will be understood that the 'heating'plates 134 are removably attached .to'the present machine and adjustably' held thereon by bolts 156. The heating elements are supplied by electrical current, the current wiring of said elements being connected to the plug terminals 157 to which in service socket terminals are applied, which are connected with a source of electrical supply.

1 From the foregoing it will now be seen that when operating the machine, the attendant places a cut blank over the mold opening in the plates 134, 135, 136, and 137' and plates 138, the edges of the blank overlying the opening in the plates 135, 136, 137 and 138. The blank having been placed, the treadle 130 is depressed so that the lever 128 is rocked on its pivot 129. Before the rod 133 is engaged, the rod 127 is lifted to depress the retaining head 119 to-its working'position in arriving at which, the die sections 108 and 109 engage the blank and force the same into the mold; opening of the plates 138 and between the'inner edges of the folding sections 135, 136 and 13 Y The above isthe position assumed by the pa-rtswhich upturns the edges of the blank in the mold. When the lever 128 engages the rod 133, the rod 133 is lifted by the continued movement of the lever 128 with the result that the rod'133 shifts the valve 77 upward to expose the passage 72'to the compressed air coming through the pipe 70.

r This compressed air entering above'the piston 64 depresses the same with the shaft 66 with which it is connected. The shaft '66 in its operation rocks the levers 82, 83 in the manner above described, with the-result that pairs of lever-s 93 at the back of the machine and at the front of the machine are rockedsuccessively in the order named The outer or disk ends 94 thereof being depressed The nuts 95 engaging the nuts 97 on the rods 96 depress the cam arms 100- with'the result that the sliding heads 99 and brackets 143 are moved toward the center of the machine in correspondence with the angle at which the slide plates 103 and the cam arms 100 are set.

'Asabove described the movementof the brackets 143 toward the center'of the machine operating through the bars 142- and 146 shift the folding sections 135,136 and 137 toward the center of the mold and over the adjacent edges of the die sections 108 and 109 folding the material of the blank which was upstanding to lay it down clo'se upon the said die sections.

It will be noted that the-precession of the movement of the levers 93 at the backof the machine in relation. to the levers in front of the machine results in laying the upstanding edge of the blank upon the die sections at the back of the machine before the rest of the material is laid.

Theabove actions resulting in the overlaying of the edge of the machine is completed and the folding sections 135 136 and 137 are brought to rest before the shaft 66, and the rod 68 connected therewith engages the yoke 56. When the engagement does take place, the levers 53 are rocked to lift the bed plate 51 with force, pressing thematerial of the blank and the overturned edges thereof upward against the sections 135, 136 and 137. This pressure is exerted until the operator releasing the treadle 130 permits the spring 131 to pull the rod 127 downward rocking the lever 128 to depress the rod 133 and shift the valve 77 so that the passage 78 opens communication between the inlet port 72 and the exhaust port 76, and open the port 74 to admit compressed air to enter the piston 64 which is then returned rapidly to its lifted position reversing the various operations above described, resulting in relieving the pressure on the .bed

plate 51, retracting the foldingsections 135,

153 is transferred to the sections 135, 136

and 137, which being heated, operate upon the over-folded edge. By this arrangement, however, if for any reason the machine is arrested in its operation with the pressure applied to the folded collar edge, the heat in thesections 135,136 and 137 is gradually llO diminished by absorption to the collar and is augmented by the time during. which the pressure is maintained The bindingztermi; nals 159 as seen best in Fig. 6 of the drawings' supply electric current to an electric heating element of conventional type containedin the pad 158. 7

It now remains for the' operator to remove thecollar from the die sections 108 and 109. vThis is accomplished by moving .the end blocks which support the dieIsections 108 toward the die section 109. The spaces between the die sections 108 and 109 shown best in Fig. 24 ofthe. drawings is sufiicient to'provide enough movement of the die sec tions 108'to clear the same from engagement with the overturned edges of the said blanks. When thus cleared it is" obvious that the blanks maybe quickly and easily removed from the said die sections. To the end that the blocks 115 may be shifted, they are slidably mounted in supporting blocks 160. The blocks 160 as best shown in Fig. of the drawings are fixedly mounted on a channel .bar 118 by means of screw bolts 161. The block 160 has extensions 162 and 163 which are adapted to rest in the recesses 16%- and 165. The extension 162 normally engages the block 115 for maintaining the service relation thereof. The extension 163 extends into the recess 165 only when the block 115 is moved backward against the pin 166 to compress the spring 167 behind the said 111. r p Engaging the outer end of the pin 166 is a spring 168 which is anchored at the lower end to the block 115 and which normally supports the said block in service relation to the channel bar 118 and to the block 160. When it is desired to remove the compressed collar or blank from the die sections 108 and 109, the end blocks 115 are moved toward the center block 115, or referring to Fig. 27

. of the drawings the block 115 shown therein would be moved to the right until the die 108 connected with this block 115 is drawn from under the overturned edge of the blank.

It will be noted by reference to Fig. 27 that the inner ends of the recesses 16% and 165 are flared or widened. This permits the block 115 to be rocked on the center of the block 160 without disturbing the said block.

The rocking action thus imparted to the die 108 with which the block 115 is connected disposes the blank in position to be readily removed from the said die. When the block 115 is thus rocked the spring 168 extending. from the pin 166 is stretched. hen the block 115 is released the spring 168 returns the block to its normal position.

In Figures 30 to 33 inclusive are shown modified forms of collar blanks. These blanks have the material thereof adjacent the inner angle of the blank embossed to form raised sections 169 at the outer edges of the material constituting the blanks. WVhen this material is thus subsequently overturned as shown in Fig. 33 of the drawings, it will be found that the material has been stretched by embossing the same so that it extends around the inner angle formed by the overturned edge without crinkling or ridging.

In Figures 18 to 22 of the drawings there is illustrated, step by step, the method of turning the outer angles or corners of the blanks and to perfect the joint indicated in Fig. 22 by the numeral 170. The successive steps are shown as in Figure 19 where the pointed extremity 171 is upturned, in Fig. 20 where the said pointed end 171 is folded over, in Fig. 21 Where the sides of the pointed ends 171 and the edge 172 of the blank 173 together With the sides of the said end 171 have been upturned, and finally in Fig. 22 where the edge 172 folded upon the blank 173 as well as the sides of the extremity 171.

The outer or pointed corners of the collar are formed as above described my means of the block 174 and the side pieces 1'75 and 176 shown best in Fig. 17 of the drawings.

Theside pieces 175 and 176 and the blocks 17% are permanently mounted upon the folding sections 136 as shown best in Fig. 9 of the drawings.

When the sections 135 and 136 are thus equipped the material constituting the blank is first acted upon by the blocks 17 1. The blocks 174 upturn the pointed extremities 171. In the position shown in Fig. 19 of the drawings the continued downward movement of the die sections carries the blank between the side pieces 175 and 176 imparting to the material adjacent the extremities 171, the fold indicated in Fig. 21 of the drawings. From this point the con tinued movement of the die sections 108 and 109 carries the material down between the mold plates 138 to receive the folding sections 135, 136 and 137 as the same are immediately moved in over the upstanding edge and which complete the edge and the fold at the pointed extremity of the blank as shown in Fig. 22 of the drawings. 7

Having thus fully described the invention, what is claimed, is j 1. In a folding machine of the character described, a table having a well therein, a bed plate in the said well, mould plates resting on said table and overlapping the said well and having cutouts corresponding to the contour of the end portions of the article to be formed, said mould plates being movable towards and from each other to-determine the length of the article when formed, a die disposed above said bed plate, means for carrying said die and moving the same towards and away from said bed plate, means for turning the edge portions of a blank over said die when the blank is clampsections being movable towards the intermediate plate sections, and means carried by the end sections for turning the corner portions of a blank upwardly for the fold ing of the same downwardly and under the main'portion of the blank when the intermediate plates are moved inwardly toward each other to fold the edge portions of the blank upon the die.

3. In a folding machine of the character described, a table'having a well therein, a

bed plate in the said well, an arm pivoted to said table, a die carried by said arm and disposed above said well, a lever pivoted to said table and having one end engageable with said arm, a treadle bar, a link connecting said treadle bar to said lever for imparting movement to the same and to depress said arm and die, a mold upon said table and overlapping the said well and having a die receiving opening conforming to the contour of said die, and seam turning plates slidable above the mold for engaging edge portions of a blank clamped between said die and said bed plate and turning the edge portions of the blank down upon the die substantially as and for the purpose set forth.

l. In a folding machine of the character described, a table having a well, a bed plate in the said well, a die disposed over the said well, means for supporting said die for movement towards and away from said bed plate, means for imparting movement to said die supporting means, turning plates slidable horizontally for engaging edge portions of a blank and folding the same over onto said die to form a seam portion, inclined arms slidable vertically, sliding heads receiving said arms and having track forming heads, blocks slidable horizontally in said heads, the arms embodying inclined cam pins extending through inclined openings in said blocks to impart sliding movement to the blocks When the arms are moved vertically,-bars connected with said blocks and having longitudinally extending slots there in, heating plates disposed above said turn ing plates and having inclined slots there in, stems extending from said turning plates through the slots of said bars and heating plates, and means for moving said arms vertically to impart horizontal movement to the said blocks and bars and through the medium of said stems to impart sliding movement to said turning plates.

EDWARD B. ROBY.

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