US2720667A - Cementing and folding machines - Google Patents

Description

Oct. 18, 1955 W. E. NAUGLER CEMENTING AND FOLDING MACHINES l x l r nl 8 Sheets-Sheet l fn Uenm@ Walter E'.Naug/er CEMENTING AND FOLDING MACHINES Filed 001i. 2l, 1952 8 Sheets-Sheet 2 Oct. 18, 1955 w. E. NAUGLER 2,720,667

CEMENTING AND FOLDING MACHINES 'Filed oct. 21, 1952 s sheets-sheet s /n Uenmv Walter E'. Nang/er' By ME Attney Oct. 18, 1955 w. E. NAUGLER 2,720,667

CEMENTING AND FOLDING MACHINES Filed Oct. 21, 1952 8 Sheets-Sheet 4 442 450 Y 444 432 4420 V 434 340 7 4 446` fg v -*g 448 o 460 48E Q 436 ,v -V 462 f 478 454 430 y 460 0 425 Oct. 18, 1955 w. E. NAUGLER 2,720,667

CEMENTING AND FOLDING MACHINES Filed Oct. 2l, 1952 8 Sheets-Sheet 5 f'z Jemima WC1/fer EJVaug/er- Oct. 18, 1955 Filed 001'.. 2l. 1952 W. E. NAUGLER CEMENTING AND FOLDING MACHINES 8 Sheets-Sheet 6 fn venan Walter E-Naug/er I A l Oct. 18, 1955 w. E. NAUGLER CEMENTING AND FOLDING MACHINES 8 Sheets-Sheet '7 Filed OCT.. 2l, 1952 [n venan Wa/er E Naug/er Oct. 18, 1955 w. E. NAUGLER 2,720,567

CEMENTING AND FOLDING MACHINES Filed oct. 21, 1952 s sheets-sheet a ffy-fz 327 f United States Patent O M' CEMENTING AND FLDING MACIHNES Walter E. Naugler, Beverly, Mass., assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application October 21, 1952, Serial No. 315,895

9 Claims. (Cl. 12-55.1)

This invention relates lto machines for cementing and folding edges of work such as shoe uppers and of the type in which cement is applied to the work immediately prior to the operation of the folding instrumentalities.

Although it was realized for many years that the cementing operation as a separate step could be eliminated if folding machines were provided with means for applying the cement just prior to the folding operation, it has also been understood that the usual cements such as those of the rubber or pyroxylin type would not set quickly enough to hold the fold afetr the work had left the machine. Later it was found that cements of the thermoactive type provided one possible solution and there was developed a machine for handling such cements which is illustrated in Letters Patent of the United States No. 2,301,202, granted November l0, 1942, upon the application of Paul H. Dixon. While such machines have been in successful use for a number of years, the desire has persisted for a machine which would handle an even more viscous type of thermoplastic resinous adhesive. Such cernents, however, have proven difficult to handle because of their viscosity and the consequent requirement of higher temperatures and greater pressures. The need for such cements is found particularly in the folding of skiv'ed leather edges and the need is greatest where the leather of the upper material is stijf and has a marked tendency to return to its unfolded condition unless the cement sets very quickly and has a good bonding power. These leathers are typified by those known to the trade as Cordovan and as Scotch Grain. An additional diiculty has arisen in machines designed to handle the more viscous thermoplastic resinous materials because of the high temperatures required to heat the supply of material in a receptacle and the consequent tendency for such cements to cook or burn on the receptacle in cases where the cement has been kept at a high temperature hour after hour and perhaps day after day.

Accordingly, an object of the invention is to provide an improved machine for applying a cement and forthwith folding the work, capable of utilizing materials requiring high temperatures and considerable pressures.

In step-by-step folding machines of a type which has been in common use for many years, provision is usually made for quickly changing the rate of feed of the work so that the operator may obtain full production on the straightaway portions and yet be able to slow down the feed when working on corners or other areas which require more careful attention. There is provided, therefore, in accordance with a feature of the invention, an intermittent drive for the cement feeding mechanism and a connection between the Work feeding mechanism and this drive so that the control by the operator of the usual mechanism for changing the feed of the work is also effective to change similarly the speed of the intermittent drive for the cement feeding mechanism.

This and other features of the invention will best be understood from a consideration of the following specili- ICC cation taken in connection with the accompanying drawings, in which Fig. l is a side elevation of a machine embodying the invention with portions of the frame cut away and in section to show the internal mechanism;

Fig. 2 is a transverse section on the line ll--II of Fig. 1;

Fig. 3 is a view of the work-engaging parts of the inachine, taken from the side opposite to that shown in Fig. l and drawn on a larger scale, the cement pot scraper having been omitted;

Fig. 4 is a detail View of the creaser foot with its internal passages;

Fig. 5 is a section on the line V-V of Fig. l showing a part of the snippet mechanism and also the changespeed mechanism included in the drive for the gear pump;

Fig. 6 is a fragmentary section taken on the line VI-VI of Fig. 5 to show a portion of the manual adjustment for the change-speed mechanism;

Fig. 7 is a diagrammatic angular View of the changespeed mechanism for the pump drive;

Fig. 8 is a fragmentary View, partly in section, on a large scale taken along the axis of the drive shaft for the intermittent cement-feed pump;

Fig. 9 is a detail in transverse section on the line IX-IX of Fig. 8;

Fig. 10 is a View, partially in elevation and partially in section, of the change-speed work-feed mechanism and is taken on the line X--X of Fig. l;

Fig. 11 is a view on the line XI-XI of Fig. 1 showing the mechanism by which the snipper knife is thrown into operation;

Fig. 12 is a plan view of the cement-feed mechanism shown in Fig. 3 but omitting the scraper for the sake of clarity;

Fig. 13 is a section on the line XIII-)GII of Fig. 3;

Fig. 14 is a horizontal section on the line XIV-XIV of Fig. 3;

Fig. l5 is a similar section on the line XV-XV of Fig. 3 but with the snipper knife and the creaser-foot omitted;

Fig. 16 is a fragmentary portion of the support for the creaser-foot carrier shown in connection with a linger lever for lifting the same;

Fig. 17 is a fragmentary view looking down on the cement pot and showing the drive for the associated scraper;

Fig. 18 is an angular view of the scraper removed from the pot; and

Fig. 19 is a vertical section through the cement pot on the line XIX-XIX of Fig. 17, but leaving the whole of the scraper therein.

The frame of the machine comprises a hollow base 10 (Fig. l) forming an oil reservoir, this base having a laterally extending arm 14. The arm 14 includes a removable end portion 16 on which is secured a worksupporting plate 18. Removably secured to the upper portion of the base 10 is a cap 19 having a neck 20 which overhangs the arm 14 and terminates in a removable head 22. The basic structure of the machine is similar to that shown in Letters Patent of the United States No. 2,270,891, granted January 27, 1942, upon the application of C. A. Newhall.

Supported on the outer end of the arm 14 is a gage block 24 (Fig. l) having an upturned surface for dellecting upwardly the margin of the work to be folded. The extent to which the margin of the work is deflected upwardly is determined by a gage linger 28 which is mounted on the lower portion of the head 22 in a manner to be described. Since this gage finger determines the extent to which the margin of the Work is deected up- Patented Oct. 18, 1955r Vparallel to the maindriveshaft 42.

Y. ward1y, it also determines the width of the fold which is Vto be formed therein. A folding finger v30 (Fig. 1) Vis mounted for oscillation in the arm 14 in a path forming an acute angle with the upper surface of the arm 14 and Y folds the margin of the work, which has been deflected Y upwardly by--the'gage block 24, against the adjacentY surface of acreaser-foot 32. VDuring the upward movement Vof the folding finger 30, the work is held against 4movement` on the work support 18 yby meansrof a gripperV member 34 (Fig. 1) which movesfrom a position within the uppersurface of the arm 14 to a position above this surface in which it grips the work Yagainst the under surface of the creaser-foot 32.

Located beyond the folding finger in the direction of feed` of theV work is a hammer 36 (Fig. 3) which cooperates with an Yanvil k38 to press the fold formed by the folding finger 30. After the fold has been pressed between the hammer and anvil, the gripper member 34 moves dowmwardly. to'release its holdon the Work and the hammer and anvil then move as a unitV toward the observer in'Fig. 3 Yto feed therwor'k pastthe gage block' Y l it andthe adjacent surface of the creaser-foot by adjusting Y the position of the stud 66 on which the arm 64 isby-step manner generally as described in the aforemeni tioned Newhall patent. Y

A snipper knife 40 (Figs. l'andV 14) is mounted ,on the head 22 and is arrangedto be moved downwardly Y under the control of the yoperator for snipping the margin of the work when a sharpy incurved portion thereof is being folded. This snipper knife moves between the gage block `24 and the folding finger 30 and the adjacentV surrface ofthe gage Vblock isformed as a shearing surfacewith which the knife cooperates when moved ,down- -10 and the arm 14 of the machinel and is provided at its right end with a pulley 44 by which it may be connected 'by a belt 46 to any suitable driving means. The Work gripper member 34 is mounted on the outer'end of a rocks'haft 48 journaled in the arm 14 and extending A release arm 50 (Figs. Vl 'and 2) is secured to the inner end of the shaft 48` and formsV means by which the shaft 48 may be manually rocked by the operator to move the gripper end of which is rounded and acts as a cam follower,

this portion'of the arm engaging the periphery of a cam 54 mounted'onthe drive shaft 42. The cam 54 is integral Ywith a collar 56 (Fig. 1) adjustably secured to the shaft 42 by means of a pinch screw 58.

Y A spring 60 engages a recess in the under side-of the Vrelease arm 50, the lower end of the spring engaging `a. screw 62 threaded in the arm 14. This spring maintains the arm 52 in engagement with the cam`54 so that rotation of the cam vwith the shaft `42 will impart a rocking Vmovement tothe rockshaft 48 to move the gripper member 34 intermittently into and out of the upper surface of the arm 14. VOn they other hand, the shaft 48 ymay Vbe manually moved-bythe operator by applying pressure to the release finger 50 when itis desired to hold thel Provision is made for adjusting the pathvof movement of the folding finger inorder to vary the space between Vportion 16. In order to `hold the bushing in the desired position of adjustment, the inner surface ofthe arm 71 around the margin thereof is provided witha plurality of notches with which cooperates a detent having a depressible, outwardly extending portion 72.. Y The gripperoperating cam 54 is so adjusted on the shaft 42 that the gripper 34 holds the workV against-the under surface of the creaser foot 32 Yduring the movement of the foldingVV ngerr to fold the'margin of the work against the adjacent'surface of the creaser-foot. j Y

The anvil 38 is'supported by means of'ahollow shaft S0, (Figs. 2 and 3) journaled in the arm 14 and arranged to be oscillated about its axis by mechanism to be described. The anvil 38 is mounted on the outer end-of an arm'82 which extends rearwardly and downwardly, as

indicated in Fig. 3, Ythe lower en d thereof terminating in a split clamp84 secured to the shaft V80 by means of a screwr86. f

The hammer 36 which cooperates with the anvil 38 to press the folded margin of the work and to feed the work Vouter end of which carries the anvil 38.

is formed at the upper end of an arm 94 whichV is pivoted between itsends on a pin 90 mounted in the arm 82, the Oscillatory movement is imparted'to the lhammer 36 to move the hammer toward and away from the anvil by a reciprocating rod 102. As the shaft 80 is oscillated, it will cause oscillationrof the anvil 38 and, by reason of the mounting of Ythe. hammer, a similar motion will be imparted Vmember 34 downwardly when desired. The release arm L 50 includes a downwardly extending portion 52 the lower by a crank pin 68 on the end of the drive shaft 42 which Y is receivedrby a slotted pin 70 carried by an intermediate Y portion of the arm 64 Vso that upon rotation of the Vdrive thereto so that the hammer and anvil are moved together along the line of feed. During this movement of the hammer and'anvil,.the hammer is adjacent to the anvil with a portion of the fold in the margin of the workY pressed and held therebetween. s

The mechanism by whichthe liarnmeris moved toward and away from the anvil will now bedescribed. The hammer-carrying .arm 94 (Fig. 3) Vis bifurcated at ,its` lower end to embrace oppositesides of ablock 104 moilnted on the rod 102. Pins 106 pass through alined YaperturesV in the arm 94 and pivotally connect the arm to theV block 104 for movement therewith.V 'The block 104V is maintained against a stop 108 carried by the rod 102 by a spring 110, the outer end of which bears against a nut 112 threaded on the outer end of the rod 102. The inner end of the spring bears against the block 104, so I that the hammer will be oscillated aboutV the pin 90 as the-rod 102 is reciprocated. The spring V110 forms a yielding connection between the armV 94 and the reciprocating rod to permit relative movement between these mem- 'Y bers to soften the blow of the hammer against the work.VV

In order'to cause reciprocation of the rod 102 within the hollow shaft 80 to move the hammer 36 toward the anvil,.the shaft 42 is provided with an eccentric surround-Y nected by a link to the Vlower end of a lever 142.

This lever is journaled on a stud 144 mounted in the base of the machine and theV upper endpof this lever is con-K4 i nected to the inner end of the reciprocableY rod 102.Y As the shaft 42 rotates, the rod 102 will be reciprocated in time relationship with the folding finger 30 and the gripper A member 34 which are also driven from the shaft 42.

The hollow` shaft 80 which is oscillated to impart feeding movements to the hammer and anvil is also connected to the shaft 42. For this purpose an eccentric (Fig.Y l0) is mounted on the shaft 42 and is surrounded by a strap 152 having a depending arm 153 the lower end of which is pivotally connected to a lever 154. This lever is journaled on a stud 156 mounted in the base of the machine. The opposite end of the lever 154 is connected to a link 160 by means of a pin 158 traversing the forked upper end of said link. The opposite end of the link 160 is also forked, as indicated in Fig. l, and is connected by means of a pin 162 to the upper end of an arm 164. The pin 162 also carries the lower end of a link 166 pivotally connected at its upper end to an arm 168 secured to the hollow shaft 80 which supports the anvil for oscillation.

The arm 164 forms with the link 166 a toggle through which oscillation is imparted to the shaft 80 as the pin 162 connecting the arm 164 and the link 166 is moved more or less out of alinement with the opposite ends of the arm and link respectively upon rotation of the shaft 42. The lower end of the arm 164 is supported by a pin 170 which is in turn supported by an arm 172 fixed to a feed-control shaft 174 (Figs. l and 5) journaled in a hollow bearing sleeve 176 in the base of the machine. Upon turning the shaft 174, the arm 172 is swung about the axis of the shaft, thus moving the pin 170 on which the arm 164 is supported so as to cause the pin 162 connecting the arms of the toggle to lie more or less in alinement with the ends of the toggle arms whereby the amount of oscillation of the shaft 80 for a given movement of the link 160 may be varied. Thus the amount of feeding movement of the hammer and anvil will also be varied.

The feed-control shaft 174 extends outwardly from the base of the machine and is connected by an arm 180 (Fig. 5) to a rod 182 suitably connected to a treadle. This arm is urged upwardly by any suitable means, such as a spring (not shown), and the extent of upward movement is limited by the engagement of an arm 184, rigid with the shaft 174, with an adjustable stop 186 threaded through a bracket 188 fixed to the base of the machine. When the arm 180 is in this upper position, the pin 170 is in the position illustrated in Fig. 10, which is the normal operating position thereof. If a longer feeding movement of the hammer and anvil is desired, the shaft 174 is moved in a counterclockwise direction, as viewed in Fig. 5, to the position shown there, by downward movement of the treadle rod 182 so as to carry the pin 170 more out of alinement with the pin 162 and the upper end of the link 166 of the toggle. Movement of the shaft 174 in this direction is limited by the engagement of the arm 184 with a stop peg 190 received by one of several holes in the lower portion of the bracket 188. The position of this stop peg may be varied adjustably to limit the maximum work-feeding movements of the hammer and anvil.

It will be noted that the mechanism for operating the reciprocable rod 102 for causing movement of the hammer toward and away from the anvil and that for oscillating the shaft 80 for imparting feeding movements to the hammer and anvil are entirely enclosed by the base and the cap 19 with its neck 20 forming a cover therefor. The base may therefore be filled with oil to maintain the various operating parts and connections properly lubricated whereas the various adjustments heretofore described are all located so as to be accessible eX- teriorly of the casing, thus simplifying the various adjustments that may be desired during the operation of the machine.

Having described the work-contacting tools which are supported in the lower arm 14 of the frame, it is in order to describe those coacting tools which are supported in the removable head 22 attached to the neck 20 of the frame. This removable head 22, the attaching portion of which is shown in section in Fig. l, comprises a casting which has a side plate 200 erected on the side toward the observer in Fig. l and from the lower edge of this side plate the casting is extended away from the observer to provide an underlying portion 202 which includes a transverse web 204 (Figs. 14 and 15) and which extends upwardly again (as seen in Fig. 3) terminating in a triangular plate 206.

Integral with the web 204 is a depending member 20.8 I

(Figs. 3 and 15) passing through which is a pivot rod 212. On this pivot rod 212 are mounted the gage linger 28 and a finger piece 214. The latter is normally held upward by a spring 216 (Fig. l) but the arrangement is such that the finger piece may be depressed by the operator to lift the gage finger when inserting a piece of work to allow the skived margin of the work to be slipped into the space between the gage linger and the gage block 24. The finger piece 214 has a recess which receives a slotted end 215 of the gage finger, thus providing for the front to back adjustment of the gage linger with respect to the gage block so as to accommodate different thicknesses of work.

Also mounted on this underlying portion 202 is the snipper knife 4@ (Fig. 14) which is adjustably secured by a screw 218 to a bell-crank supporting lever 220 having a hub 221 which is carried between pivot screws 222 and 224. The rst of these screws is threaded in the lower portion of the side plate 201i while the other screw is threaded in a lug 226 forming an integral extension of the web 204. To prevent the moving work from springing the supporting lever 220 for the snipper knife 40, the depending member 288 has a further extension 228 in which there is threaded a screw having a head 230, which is shown in Fig. 14, and against which the face of the snipper knife 40 rests. It will be clear that by means of the screws 222 and 224 the plane of movement of the snipper knife may be adjusted to bring it close to the far face of the gage block 24, as seen in Fig. 1, it being remembered that the knife cooperates with this block to provide a shearing action as cuts are made in the skived margin which is turned up from the body of the work between the gage linger 28 and the gage block 24. Attached to the upper arm of the bell-crank lever 220 is a rod 232 to which a reciprocating movement may be imparted at the will of the operator by a mechanism to be later described.

It may be desired to adjust the position of the creaserfoot 32 to vary the work-margin receiving space between it and the adjacent surface of the folding tinger 30, said foot being attached by screws 234, 236 (Fig. 4) to the lower end of a cement tube 240 having a passage 241 (Fig. 3) connecting a receptacle 312 (to be described) to a passage 300 in the creaser-foot 32 which enables the latter to act also as a nozzle. This cement tube 240 is movably supported, as later described, so that it may be raised to insert the work, on a carrier plate 242 (Figs. 3 and 13) overlying the web 294 of the head casting 22. The carrier plate is supported in the head 22 by means of screws 244, 246, 248 (Fig. 13) which are received in grooves as at 250 in the side edges of this carrier plate. This allows adjustment horizontally of the supported creaser-foot 32 with respect to the folding finger 30 and by turning in and out the screws 246, 248 permits the lateral position of the carrier plate 242 to be determined so that said foot will clear the anvil 38. An adjustment of the plate, endwise of the head, is accurately effected by provlding a groove 243 (Fig. 3) in the bottom of the carrier plate to receive a cylindrical piece 252 eccentrically mounted on a pin 254 and secured thereto by means of a set-screw 256. The pin 254 is frictionally held against rotation by a tight fit in the lower part of the triangular portion 266, shown in Fig. 3, and at its other end in the side plate 200.

At its front end the carrier plate 242 has an extension 266 (Fig. 13) to furnish a mounting for a pivot 261 (Fig. 16) at one end of a supporting link 262 (Fig. 13) which has a pivot screw 265 joining it to a hump 267 on the tube 240. At its other end the carrier plate has spaced lugs 264, 266 (Fig. 13) to provide a tiltable mounting for l the upper portion of the cement tube 240.

Specifically, this mounting comprises a U-shaped yoke 270 (Fig. l2) pivoted upon a shaft 272 passing through the lugs 264, 266. This yoke has forwardly extending arms274serving as links to receive a pivot pin 276 passing through a hump 278 (Fig. 3) on 'the lower side of the Y cement; tube. Upward movement of the creaser-foot Y and the cement tube Vabout the shaft 272 and the link pivot 261 may be effected by the depression of a finger piece 280 (Figs. 1 and 16) attached to the outer end of a cross rod 282 on-which an arrn 284 (Fig. 16) is secured. This arm has at its outer end a roller 286 positioned to underlie the link 262.A VThe lifting action is eifected againstthe action of a spring 288 (Fig. 16,) surrounding'a rod 290, a v lower end of which is pivotally attached to the link 262 at 292." The rod passes through a plate 294 having a pivot extension 296 which rocks in Van upstanding arm Y298 forming part ofthe carrier plate 242. Threaded in the plate 294 is a bushing 297V to adjust the tension of the spring 288 and on the rod is a lock nut 299. f- Y It will be noted that the connecting passages 300 in the creaser-foot 32 (shown in Fig. V4) join the passageY 241` inthe cement tube 240 to the bottom surface 302 ofthe creaser-foot. The latter is provided with a lateral hollow extension 304 for the reception of a heating unit Y designed to maintain the temperature of the creaser-footV at a desired value. Y

Furthermore, within the Vpassage 241 in the tube 240 there is a heating unitr306 (Fig. V3) supported at its upper end in a bushing 308 threaded in the tube 240. The upper end Vof this unit is provided with terminals 310'supported on a Ybracket 311 and to which electric conductors may be attached and led to any suitable-control deviceY whereby the temperature of the passage surrounding this heating unit 306 may be maintained at its Y desired value.

nected by electric Vconductors to a controlled source of electrical heatingV energy. Y At the bottom of this receptacle 312 is a chamber containing a gear pump comprising gears 324 (Figs. 3, 17

and 19)Y mounted on" laterally. extending shafts 325, 327. The shafte325 is provided with a driving pinion .7326 and ar'worm 328. It will be seen from Fig. 3 that Vthe gear pump feeds into an outlet passage 330 which opens directly into the passageV 241 of the tube. The pinion-326 which is attached to the pump gear 324 Vmeshes with an idler 332 to which power is transmitted by Va gear 334 carried by the shaft 272 about which the yoke 270'swings and on this Vshaft between the arms of the yoke isla skew gear 336 (Fig. 12) meshing in turn 'With another gear 338 on a shaft'340 extending lengthwise ofthe frame arm 20 and to whichpower may be delivered intermittently byV a mechanism to be later described.

Ditticultiesrwhich have been previously encountered when employing thermoplastic cements, because of overheating or .cooking of the cements if they are kept for a long time at an elevated temperature, have been overcome by the utilization within the cup `314 of a rotatable scraper 342 ',(Fig. 18). This comprises an upper rim 344,v on which thereV is mounted an annular gear 346 meshing with a Vgear348 (Figs. 17 and 19) which is carriedrat the upper Vend of a shaft 349 journaled ina bracket 350.attached to the receptacle 312. At the lower end of this shaft 349 is a worm gear 352 meshing with the previously mentioned worm 328 attached to the drive shaft 325 ofthe gear pump. Whenever the gear.

pumpris driven, therefore, the scraper is rotated and it will be notedthat itis provided with a pair of depending blades 354 each'of which extends downwardly from the upperfrim 344 of the scraper torslide on the inner wall of the cup 314.V The active edges 356 of these scraper bladesV extend rearwardly and downwardly, considering the direction of rotation of the, scraper, as indicatedby the arrows in Fig. 17.

Consequently, these active edges servealso to push. the melted cement, which lies immediatelyv adjacent to.

the inner face of the cup 314,-downwardly toward the gear pump chamber and at the same time allow thel cooler cement intheinner portionrofthe cup to flow outinto contact with the heated wall of the cupV to take Y theV place cf the material which Vhas been pushed downwardly. Another important advantageV of'this arrange` Vment is that, in starting the machinevinto Yoperation Vafter it has Vbeen allowed to'cool, it is only necessary to' melt a thin layer of cement immediatelyY adjacent to theVVV innerrs'urface of the cup 314`after whichthe succeeding portions of the lump of material contained in said cup` will soften, the lump willdrop down,V and melted portions Vwill move out into contact with the heated walls of the cup. Y Y Y After the whole of the material in the cup has become melted, it will be seen that Vthe scraper 342 serves also as an agitator continuouslyV to rbring cooler portions to the inner cap surface. For the above reasons there is no'danger of harming thecement by a repeated overheating or cooking and the fully melted cement will be immediately and continually furnished .to the gear pump for removal thereby and extrusion through, the

passage V241 of the cement tube. Y Y

Mechanism for the oscillationof the snipper knife 40 comprises a rod 360 (Fig. l) connected to the rod 232 by means ofv a turnbuckle 362.y yThe rod 360 passes through a partitionr364, between the cap 19 andthe neck 20, which completes the Voil chamber. The rear endof the rod 360 `is pivotally connected to'an arm 370 rockable on the shank of a screw 372 (Figjll) supported by a boss 374 (Fig. 5) carried bythe cap 19L of the `frame of the machine. The arm 370 includes a downward extension block 376 below the screw 372, the lower portion of fthe block 376 having` spaced armsY Y Vbetween which is pivotally mounted a latch 378.k

This latch is spring-biased downwardly by a spring 380 to a position in which it is located between a pair ,of

spaced arms, one of which is indicated by the reference.VVV character 382, whichextend laterally from an arm 384 Y' journaled on a pin 386 secured to the upper end of a bracket 388 V(Fig. 5) extendingfrom the base of the machine up into the cap 19. The'arm 384 is arrangedV to be oscillatedabout the pin 386 bythe drive shaft 42. To this endthe drive shaftcarries an eccentric 390v surrounded by a 'strap 392 which has a pitman 394 pivotally connected by ball and socket to an arm 396 (Fig. 1) integral with the arm 384. motion is imparted tothe arm 384 upon rotation of the shaft 42 and, when the latch 378 is in its down positionY between the extensions 382 of the arm 384,V a similar motion will be imparted to the arm 370 to which the ,rear

end of the rod 360 is connected, causing oscillation-ofVV the snipper knife to snip the margin of the work.

The shipper-operating latch 378 is normally maintainedin the up position shown Vin Fig. 11 by a lever 399 pivoted on a screw 402 threaded in a boss 403 attached to the cap 19 of the machine, inV which position the latch is out of engagement with the extensions 382 of the arm 384. The forward end 400 of the lever engages an extension 404 of the latch 378 and moves the latch up- Y wardly under the inliuence of a spring-pressed plunger 406 (Fig. 1) engaging the rear and 401 ofthe lever 399. A stop pin 408 (Fig. l) located below the rear kend 401 of the lever limits the extent of movementthereof by theV y plunger 406. Y

In order to move the lever 399 against the force of the plunger'406 to permit downward movement of, the latch 378, a rod 410 vertically movable .in a Vframe bearing 412 engagesV the underside of the ylever arm 401 op Thus, a rockingy posite the plunger 496. This rod 410 may be connected to a treadle mechanism (not shown) by means of which an upward movement may be imparted thereto by the operator whenever operation of the snipper knife is desired. The connection between the knife and the shaft 42 formed by the latch 378 is such that the upper part of the casing comprising the neck 20 and the cap 19 may be readily removed from the base of the machine whenever desired.

An intermittent drive for the cement pump is actuated by means of an eccentric 429 (Figs. l and 7) on the drive shaft 42. This eccentric imparts an oscillatory movement to a forked lever 422 pivoted at 423 and having an arm 424 (Fig. 7) joined by means of links 426 and 428 to a lever 430 which is loose on a sleeve 432 surrounding the shaft 340 and is adapted to be connected to said sleeve to give an intermittent movement thereto in a clockwise direction, as viewed in Fig. 7.

To that end, a latch 440, pivoted at 442 in a lever 43S gripping the sleeve 432, is shaped to iit in the notch 444 at the top of the lever 439 and when it snaps into that notch, under the action of a spring 448, connects the lever to the sleeve 432 to oscillate the sleeve and drive the pump. The shock resulting from thus connecting a still part to a moving part is softened by a buffer spring 434 and a follower spring 436 actirv7 on opposite ends of the lever 438. These springs, as may be seen in Fig. 5, surround rods slidable in bushings secured to the cap 19. The latch 440 has a depending tail piece 446 which is normally urged away from the end of the shaft 340 by means of the interposed spring 448. The latch 448 and its tail piece 446 may, however, be rotated against the spring 448 by the depression of a rod 459 so as to lift the latch out of the notch 444 and stop the pump.

This depression of the rod 450 is effected by a lever 452 (Fig. pivoted on a bracket 454, whenever a solenoid 456 is deenergized by an operator-controlled switch (not shown) so that its core is released from the solenoid and is raised by a spring 455. The bracket 454 is a part of a plate 458 which is clamped on the outside of the cap 19.

It is desirable to vary the amount of cement extruded during each oscillation of the sleeve 432, and eventually of the shaft 348, in accordance with the lengths of the work-feeding steps so that, irrespective of the rate of feed of the work, the quantity of cement delivered thereto will be uniform. For this purpose the arm 172, which is adjusted by the operator to vary the rate of feed, is utilized also for adjusting the extent of oscillation of the sleeve 432.

The links 426 and 428 are connected by a pin 468 to which is also connected the arms of a twin lever 462 (Fig. 6) carried by a fulcrum pin 464 extending outwardly from an end of an arm 466. A swinging of this arm varies the center about which the links-connecting pin 460 moves when the arm 424 is oscillated by the drive shaft 42. Consequently the extent of swinging movement imparted to the sleeve 432 by the eccentric 420 depends upon the position of the fulcrum pin 464.

The arm 466 (Fig. 7) is secured to one end of a rod 470 which is in turn adjustably secured, as will be described, to a sleeve 484 carrying an arm 472 which is in turn connected by an adjustable link 474, 478 to the arm 172. The two parts of the link 474, 478 are clamped together in adjusted relation by a screw 480. From the above it will be seen that upon swinging the arm 172 to adjust the lengths of the feeding steps of the work, arms 472, 466 will swing, thus varying the position of the ful- Crum pin 464 and consequently varying the extent of the oscillatory movement imparted by the drive shaft 42 to the sleeve 432 and the shaft 340.

It may also be desirable to effect an independent adjustment of the rate of feed of cement to accommodate work pieces of different characteristics requiring a greater or lesser amount of cement to hold the margin in folded condition. For this purpose provision is made for relatively moving the rod 470 and the sleeve 484 to vary the angular relationship between the arms 466 and 472, the effect of which is to adjust the position in the space of the fulcmm pin 464. The rod 470 carries a segment 482 provided with a series of spaced notches 490 arranged to be engaged by a spring-pressed latch 488 carried by an arm 486 secured to the sleeve 484. By retracting the latch 488 the sleeve 484 may be moved relatively to the rod 470 and the parts locked in the desired relative positions by engagement of the latch 488 with the appropriate notch 49). Since these parts are outside of the partition 364 (Fig. l) it is possible to make this adjustment during operation of the machine.

The mechanism for imparting the oscillations of the sleeve 432 to the gear 338 is illustrated in Fig. 8 where it will be seen that the sleeve 432 has a bearing 492 in the partition 364 between'the cap 19 and the neck 20. The left end of the sleeve, as shown in Fig. 8, terminates in a Horton clutch comprising an annular cup 494, a rotor 496 and the usual spring-pressed rolls (not shown) whereby the rotor, and ultimately the gear 338 which drives the cement pump gears 324 and the scraper 342, is driven intermittently in one direction as the sleeve 432 is oscillated.

This rotor 496 is connected to a similar rotor 498 constituting part of a one-way brake of the Horton type which prevents retrograde movement of the gear during back strokes of the sleeve. The rotor 498 cooperates through rolls 499 (Fig. 9) with a cage 500 held against rotation by a pin 502, which, as may be seen in Fig. l, is mounted on the partition 364 and is received between two lips 504 extending outwardly from the cage 50i). These rotors, separated by a washer 501, are joined by pins 566 to one another and to a cup 508 within which there is a protective friction clutch joining it to the shaft 340. If the operator should start the pump drive, by energizing the solenoid 456, before the cement has melted suiciently, the breakage of parts will be avoided by this protective clutch.

The friction clutch just described includes a sleeve 510 which surrounds the shaft 340 and at the right end of which there is a flange 512 resting against a friction plate 514 which is keyed to the cup at 516. At the left of plate 514 is a ring 518 keyed to the sleeve 510 at 520. This ring is continually urged against the side of the plate 514 by means of a spring 522, the outer end of which is held in adjusted compression by nuts 524 threaded on said sleeve. The end of the latter is notched to receive prongs 526 on a spacer 528 between the sleeve and an end Web 530 (Fig. l) of the neck 2i). The spacer 528 is pinned to the shaft 340. Thus, while retrograde movement of the shaft is prevented by the one- way brake 498, 500, the oscillations imparted to the sleeve 432 are carried through the clutch 494, 496 and the protective friction clutch to give the driving gear 338 an intermittent turning movement in one direction. The shaft 340 adjacent to the gear 338 is journaled in the web 530.

When the machine is to be operated, assuming that cement has been supplied to the frusto-conical receptacle, the operator will turn on the electrical heat for the unit 320 (Fig. 3) in the receptacle and for the unit 386 in the tube leading to the nozzle and for the unit 384 on the side of the creaser-foot. As soon as this heat melts any residue in the nozzle and a layer of cement adjacent to the wall of the receptacle, a switch, such as a knee-operated switch, may be closed to energize the solenoid 456, thereby to complete the drive for the pump by allowing the latch 440 to be closed by its spring 448 (Fig. 7).

A piece of work, having a skived edge, may be inserted in the machine in the usual fashion by depressing the finger pieces 214 and 280 so as to lift the gage finger and the creaser-foot, whereupon the Work may be moved against the gage block 24 and the iinger pieces released. Having then started the drive leading to the main shaft 42 of the machine to fold and feed the work, cement will be .i supplied continuously through the creaser-foot just prior to the folding-of the margin of thework. The cement cools so quickly that, as soon as the folded margin is pressed against the margin of the work by the hammer V36, enough heat will be removed by the leather to allow the cement to cool and to hold the fold in the work.

If, during the operation of the machine, the portions ofV the work to be treated are practically straight, Y then the treadleconnected to the rod 182 will be depressedthereby increasing the rate of feed of the work Vby the hammerv and anvil mechanism. This will be effective 'at the same 5. A machine as in claim 4 in which intermittently operable mechanism is provided to drive the work-feedtime, by reason of the mechanism, including the vertical link 474 in Fig. 7, to increase-the arc of oscillation of the driveV gear 33S and thus will increase the amount of. cement which is delivered to the work, to the end that the same amount of cementmay be applied to each unit of ythe margin.

If the character of the Work requires it, more or'lesscement may be delivered by adjusting the -latch 488 vwith respect to the segment 432 and this may be done without stopping the operation of the machine. It.

will be understood also that the snipping mechanism may Y be operated during curved portions of the work by raising the rod 410 so as tordrop the latch 378 in Fig. 11 to complete the drive for the snipper knife. The novel features of the receptacle and its scraper disclosed but not claimed herein are claimed in a divisional application Serial No.

' 507,670, filed May 1l, 1955, in my name,rfor improvementsV in Cement Handling Mechanisms. j

` Havingv thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: Y i

f1. In a folding machine, a folding mechanismV including mechanism, said drive mechanism having a manual v' control to determine the length of the feed steps, and a connection between said manual control and the control for determining the length of interval of the cement feed whereupon uniform quantities are extruded Vupon succesf sive increments of the Work. Y

6. In a folding machine, means for folding the margin `of a work piece, means for feeding the work in kal step-by-step manner past the folding means,.means for intermittently feeding cementbto the margin of thework just prior to the foldin'g'operation, means for adjusting the "rate of operation of the feeding means to vary the rate of inga creaser-foot provided with a passage terminating in Y an outlet opening, means for intermittently feeding the work past said folding mechanism, means forintermittently lextr'uding adhesive through said creaser-foot in f Ytime relation to the action of said feeding mechanism, and operator-controlled means for regulating the amount of adhesive extruded by the intermittent cement-extruding mechanism adjustable during the operation of vthe machine.

2. In a folding machine, a folding'mechanism, a workfeeding mechanism acting intermittently to feed thework in steps, means for controlling the length of the feed steps,

Y an 'e'xtruding mechanism for delivering an adhesive to the work ata point closely adjacent to saidmechanisms andV prior tothe completion of the fold, and means for driving said extruding mechanism intermittently.

. 3. Amachine asin claim 2 having connections between the mechanism controlling Vthe length of the feed steps and Vthe drive parts for thercement-extruding mechanism, op-

erative to effect the delivery of equal quantities ofy cement for 'successive increments lof the work irrespective of changes in the lengths of the work-feeding steps.

4. In a folding machine, a folding mechanism, an intermittent work-feeding mechanism, a nozzle for delivering.

cement to the work in a position to lie beneath the fold,

Y a force-feeding mechanism for said cement, and means for Voperating said force-feeding mechanism intermittently,

said operating means having a manually adjustable control determiningrthe amount of cement extruded at each interval, said control means being operable while the machineis running. Y

Vfeed of the work, and means for Vsynchronizing said workfeeding means and said cement-feeding means toprovide for the deposit of a uniform amount of cement onrthe work irrespective of the rate of feed. 1 .Y 7. In a folding machine, means for folding the margin of a work piece, means for feeding the work in a stepby-step manner past the folding means, means for intermittently feeding cement to the margin of the work just prior to the folding operation, means for adjusting the rate of operation of the feedingy means to vary the rate of Y feed of the Work, means for synchronizing said workfeeding means and said cement-feeding means to provide for the deposit of a uniform amount of cement on the work, and means for adjusting said cement-feeding means independently of said work-feeding means.

8. In a folding machine,^a creaser-foot havingl an outlet opening, a gear pump for delivering cement tothe outletY of the creaser-foot, tiltable links for supporting said creaser-foot and gear pump for lifting movement` away fromthe work, and driving means for the gear pump in- `cluding a gear which is coaxial withV the end ofr'one of the supporting links.

9. In a folding machine, a lowerarm supporting a folding finger, an upper arm-supporting a creaser-foot,

said upper arm including an underlyingV Web, means in-V cluding a Vyoke slidably mounted on saidrweb, said yoke having spaced arms pivoted on said means and serving f as links for supportingY said creaser-foot, an eccentric member interposed between said meansand sai-d web to provide for the adjustment of the creaser-foot with respect' to the folding nger, a drivenV member on said creaserfoot, and a chainof drivingy elements for said driven member including a member rotatable about the axis of thev pivot for said arms.

References Cited Vin the tile of patent

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