US2479575A - Lasting machine - Google Patents

Description

Aug. 23,1949, BJORGENSEN 2,479,575

LASTING MACHINE Filed April 1, 1948 In 0 en for Bernhar'a z Jorgerzsen By his Attorney Patented Aug. 23, 1949 LASTING MACHINE Bernhardt J orgen'sen, Marblehead, Mass., a ssignor to United Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application April 1, 1948, Serial No. 18,449

16 Claims.

This invention relates to lasting machines and is herein shown as applied toa toe-lasting machine of the same general character as disclosed in United States Letters Patent No. 2,324,509, granted on July 20, 1943 on an'application of mine, but modified in some respects as shown in later disclosures includingthat of Letters Patent No. 2,354,685, granted on August 1, 1944, on another application of mine. It is to be understood, however, that the invention is not limited to machines constructed as shown in the abovementioned Letters Patent and that in some aspects also it is not limited to the lasting of the toe ends of shoes.

In a machine such as that to which the invention is herein shown as applied a last having an upper and an insole thereon is positioned bottom upward, and while it is held in that position the margin of the upper about its toe end is wiped inwardly over the insole by, toe-embracing wipers. The wipers are moved upwardly by a wiper support into positions thus to operate on the upper, the wiper support having also thereon means for wiping the upper heightwise of the last by its upward movement. The wiper support isthus operated by fluid-pressure means comprising a pair of pistons moved upwardly by fluid admitted beneath them from a manifold in which the fluid is maintained under pressure by a continuously runnin pump. The upward movements of the pistons have served heretofore to compress a pair of springs which, upon release of the fluid under the pistons after the wipers, have wiped the margin of the upper inwardly over the insole, act on the wiper supportto increase the downward pressure of the wipers on the margin of the upper. At a time in the operation of the machine when thewipers are in their upraised positions, before theywipe the upper inwardly over the insole, the margin of the upper spread outwardly over them is operated upon by uppertrimrning means to remove therefrom all but the outer layer of the upper materials, the uppertrimming means also being operated by fluid under pressure from the manifold. l

'The construction above described has been used heretofore with highly satisfactory results. It will be evident, however, that at the time of the upper-trimming operation the wipers are held upraised by the fluid-pressure means not only against the force of gravity but also against the resistance of the above-mentioned springs which are fairly heavy in order to cause the wipers later to press the margin of the upper on the insole with the required 'force'. To afford better insurance, therefore, that under some conditions a slight momentary drop in the pressure of the fluid in the manifold by reason of the admission of fluid to operate the upper-trimming means will not prevent the wipers from being held upraised firmly enough to support the margin of the upper properly in the upper-trimming operation, the present invention, in one'aspect, provides novel means whereby the pressure of the wipers on the margin of' the upper over the insole is increased by the action of the operating fluid instead of by springs such as used heretofore. In the construction shown the pistons through which the wiper support is raised as above described are double-acting pistons, and

when the pressure is terminated beneath them after the wiping of the margin of the upper inwardly over the insole the pressure is applied above them to force the wipers downwardly. Since it is desirable that provision be afforded for varying the pressure thus applied by the wipers to the margin of the upper, the construction shown further includes a comparatively light spring which supplements the force of the operating fluid on the wiper support in pressing the margin of the upper on the insole, together with means adjustable to vary the stress of this spring. The spring thus provided is arranged to be subjected to stress only near the end of the upward movement of the wiper support'and, as compared with the above-mentioned springs used heretofore, exerts but-little force in opposition to that of the operating fluid whereby the wipers are held in their upraised positions in the uppertrimming operation.

As disclosed in the above-mentioned Letters Patent No. 2,354,685, the construction provided heretofore has been further such that after the wiper support has been moved upwardly to carry the wipers into positions for wiping the margin of the upper inwardly over the insole, it may be moved still farther upwardly against the force of gravity in response to pressure of the margin of theupper on the wipers as they wipe it intioned as to act on the upper with the best results at the extreme edge of the shoe bottom that s snurzther i hee i e en a in t verely on the margin of the upper the weight of the wiper support and of the parts thereon has been partially counter-balanced by springs carried by the pistons. The present invention further provides, instead of such springs, fluid-pressure means for partially counterbalancing the weight of the. wfiper support and of the parts thereon, the construction shown comprising comparatively small pistons movably mounted in the pistons which raise the wiper support and subject to the pressure of the operating the lower ends of cylinders in which the lastmentioned pistons are mounted. "it will abegvident that in addition to their pounterbalaneing action the small pistons assist in the raising of portio'n of the machine to which the invention h rein hown as ap lied. w h reels ilerelse away;

. EFig. 12 a view mainly in right-hand side 1eleyation, with parts br ken awa .Q ea ef h s uctu zshew -zi fiia -1 t e reds shown infithe positions which they pccup 11 ,the wipers areat the limits of their i movements over the shoe-bottom but poi-oreheir downward pressurepn --the margin .of the ge is increased; and

"Fig; 3isayieyv sim a 5 .0 3 49; portigin prune-stru ture h with fi e a s zini ei in itialwposiliiohs asrin Eig. 1.

in w ef th p i r lei e e iaesne esue "of itheema hine will he in rein descri edip detail as is--,ne ce ssary ior a L, a I invention. Th sho 1$ pq i iiq sdz a iwl e (the maehi ehbottomupwa d; by a shoerest 2 -.en a ing ibhebmltefim e .e oiathe .ieren ri -n th insol su stant al e h we1 s eseribe letters Paten NO- :Z: ?l %5-L .4 h r .2 11 4.5 onian app ication ie exee l}!!- sole in an dentati n seamed :the eie some. re Ilhe sho re t? i sem ert e'l ineer e wh c verticallyiadiustable on th -immee 3221*? an sm ians p iaisc w 6 the hqeae is adjustable relatively to the-members about an axis extendin widt wise o theshee, as rurether disclosed. in the last-mentioned L tters "Pe .ent. The .shoe is clampe a ainst the @1 9 :I fi

2 day .upwardmoii ments .of awtoerest-iii and a instep support .16 which, as well as the other operating instrumentalities of the machine, zare operated by fiuid'under'pressurc' from a man f old (not shown) in which the fluid, preiqrably light :oil, is maintainedunder pressure by. a con- .tinuously running pump, as disclosed in Letters EPatlmt No. 2,324,509;

At a predetermined time in the oper ati ;u1 of ;machine the .margin ,of :the outer layer of the toes-lend portion of the uppermaterials is wiped inwardlyiover the insolebya pair'pf gtoeembracmg 'WiDElS 112. These wipers and their Y erati-ng rneans are arried upward y @nd'dQWi wardly the courseof thep p ation of the gnachine :by a wiper. suppen 1.4 .e iullv i zclose'd in th -zlasbmentioned Letters Rateut, is

mounted on upper and lower pairs of parallel '15 the wiper support prior to the operation pith-g application ;of mine.

links l6 and I8, only one link of each pair being visible in the drawings. Also carried by the wiper support is a toe former 29 which wipes the toe end of the upper heightwise of the last in response to the upward movement of the support, this toe former being herein shown as congtrolledgbyprechanism constructed as disclosed in a copending application .of mine, Serial No. 759,849, filed on July 9, 1947. The wiper sup- .port may thus be moved upwardly twice in the .gourse .of the operation of the machine as and for the reasons described in Letters Patent No. :a-aavsaa, grantedpn December 28, 1943 on an In that case, at the end of :its first upwardfmovement the margin of the upper spread outwardly over and supported by the Wipers I2 is operated upon by upper-trimlining-means to remove therefrom all but the outer layer of the upper materials, the upper-trimi el s mothe t n shown be n er fe flui i em h meni eld t th n e the -seeme3 -u ardm v m nt .e t e l -e u o e t e u rimmin n ret en and th ins 9 th ma in o th en e layer ever the li e a e ot r ormed a th en of h s ng e upward m m m of th s r In general accordance with the'disclosure of Letters Patent No. 3,35%,685, the wiper support 9 95 2; lupwaltdly by a pair of pistons 22 vertical nie lei w eel rs .2 wh h ar secured to the ,o'f'the machine and into the lower ends of which fluid-is admitted from the manig eihroush pi e h c n t u on of these pistons cylinders is different from the earlier eens nue ieni as h rein e exp a e and by .diflferent means also the upward movements of s e p sto s a l mited t n s tien' e Wipers -pxe e relat on t the u -t imm means and to the shoe. The pistons 22 are connected ren i el t the e nosi e s de ort on of the signs 9 the s wiper support L4, as heretoiore; by links 28 v t l i mted n in 1 in th Su and proyidedat their lower ends withslots 52 through whic ext nd pins 34 m nt i upwa e t During the upward moveo the pistons the pins 34 engage the links at the .upper ends .of the slots 3.2 to raise the wiper support. When the wipers are Operated to swipe them argin of the upper inwardly over the insole, the slots 3;2 permit the wiper support and g the parts thereon to be moved farther upwardly against the fierce of gravity in response .to presf the ma s-i of t upper n h Wipers,

so that the wipers will not act vtoo severely on portions of the ;margin .of the upper in wiping it inwardly, especially if the bottom of the toe end o the lee-t has e c v c v t After the wipers have wiped the margin of supper inwardly, it is desirable .to increase their downward pressure thereon. For this purpose the construction shown in Letters Patent No. 2,354,685 includes a pair of springs arranged to be compressed by the upward movements of the pistons which raise the wiper support and, upon termination of the fluid pressure under the pistons; to cause the wipers thus to apply the increased pressure to the upper. Instead of .saz ep naei t e prese t .in Pr e a construction whereby fluid pressure'is utilized tween each of these sleeves and an annular shoulder 33 on the upper end of the'larger portion of the corresponding piston 22 is an annular chamber 49 into which operating fluid is admitted at the proper time from a pipe 42 communicating with the chamber through a passage 44 in the cylinder casting '24, the pipe 42 receiving fluid from the manifold. It will be understood that the admission and exhaust or the fluid to and from the two chambers 40 is con trolled by a valve similar to other valves shown in Letters Patent No. 2,324,509 with which the machine is provided, and that when the fluid is admitted to the chambers 40 the lower ends of the cylinders 24 are open to exhaust. Be-

fore the wipers are retracted from over the bottom of the shoe the pressure of the fluid is terminated in the chambers 48 and is applied again below the pistons to relieve the pressure of the wipers on the margin of the upper. After the wipers have been retracted the lower ends of r tons '22, so that when the pistons are in their uppermost positions the lower ends of the chambers 46 are opposite the entrances to the passages 44 to receive the operating fluid,

Since it is desirable'that provision be afiorded for varying the pressure applied by the wipers to-the margin of the upper, there is further provided a. rod 48 which is pivotally suspended at its upper end on an extension of one of the pins 3!] and has thereon a spring 50 supported by a washer 52 and nuts 54 on the lower end of the rod. The rod extends through an opening formed in one arm 56 of a three-armed lever 58 pivotally mounted on a pin 6|! on one of the clylinder castings 24. A spring 62 seated in a socket in the frame of the machine engages a second arm 64 of the lever and thereby holds the lever in a position determined adjustably by engagement of a third arm 65 thereof with a screw 68 threaded in the frame. It will be'evident that adjustment of this screw determines variably the initial distance between the arm 55 and the upper end of the spring Ell. Near the end of the upward movement of the wiper support a washer resting on the upper end of the spring 50 is carried intoengagement with the arm 56 and during the remainder of the upward movement of the support the spring is compressed by the action of the arm thereon,

the amount of its compression depending upon the adjustment of the lever 58. The force of this spring is therefore added to the pressure of .the operating fluid in the chambers in pressing the wipers down on the margin of the upper when the pressure is applied in these chambers an the pressure of the fluid in the lower ends upper.

of the cylinders 24 is terminated, and since the force of the spring may be readily varied as above explained provision is afiorded for varying as desired the pressure of the wipers on the margin of the upper. To indicate to the operator what the conditions are with respect to this adjustment, a cylindrical portion of the screw 68 projecting forwardly from the frame has thereon a series of marks l2 one or another of which may register with the front face of the frame. It will be understood that as compared with the springs used heretofore for pressing the wipers down on the margin of the upper, as disclosed in Letters Patent No. 2,364,685, the spring 58 exerts but little force in opposition to the pressure of the operating fluid in the lower ends of the cylinders 24 when the wiper support is held upraised by the fluid at the time of the trimming of the margin of the Any tendency, ierefore, for the wiper support to be lowered slightly in response to a momentary reduction of pressure in the manifold when the fluid is admitted to operate the upper-trimming means is minimized. By reason, moreover, 0f the elimination of the springs used heretofore less power is required to raise the wiper support.

Further to insure that the wipers will not act too severely on the margin of the upper in wiping it inwardly over the insole,'at which time provision is afforded for further upward movement of the wiper support 44 against the force of gravity in response to pressure of the upper on the wipers as hereinbefore explained, the invention provides novel means for partially counterbalancing the weight of the support and of the parts thereon. For this purpose small pistons F4 are movably mounted in the pistons 22 with their upper ends in positions for engagement with the lower ends of the links 28, the lower ends of the small pis tons being subject to the pressure of the operating fluid in the lower ends of the cylinders 24 when such pressure exists. It will be understood that the pistons M are of such small diameter that they they are not of themselves effective to raise the wiper support, although they assist the pistons 22 in thus raising it. When the wipers wipe the margin of the upper inwardly over the insole, the action of the small pistons in partially counterbalancing the weight of the wiper support and of the parts thereon reduces the resistance to such further upward movement of the support as may result from the pressure of the margin of the upper on the wipers. To limit downward movements of the pistons it when there is no pressure in the lower ends of the cylinders 24 they have on their upper ends flanges 16 arranged to engage the pistons 22,

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a lasting machine, wipers for wiping the margin of an upper about an end of a last inwardly over an insole on the last, double-acting fluid-operated means movable in opposite directions successively by the pressure or operating fluid thereon, and mechanism for moving the wipers heightwise of the last into positions for wiping the margin of the upper inwardly over the insole by the movement of said fluid-operated means in one direction and for increasing the pressure of the wipers on the margin of the upper over the insole by movement of said means in the opposite direction.

2. In a lasting machine, wipers for Wiping the emareinzo a wunpe abput n Q a a tinwa d y over an insole ,on the last, asupport for said -WiprS-,munted :f or movements heightwise of the zia'st, ,and fluid-operated means arranged to be moved in one direction to cause said support to carrythe wipers heightwise of the last into positions :for wiping the margin of the upper inwardly .over the insole and thereafter to be forced in the ,opposite direction by the pressure of operating fluid thereon to increase through said support the pressure of the wipers on the margin of the ,upperlover the insole.

3. In a lasting machine, wipers for wiping the margin of an upper about an end of a last inwardly over an insole on the last, a support for :said ,Wipers mounted for movements in opposite directions heightwise of the last, and a pair of ,doubleracting pistons movable in opposite directions by the pressure of operating fluid thereon for imparting corresponding movements to said support and for thereby positioning the wipers relatively to the last before they wipe the margin of the upper inwardly and thereafter increasing their pressure on the margin of the upper over the insole.

4'. In a lasting machine, the combination with means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about the toe end of the last inwardly over the insole, a support for said vwipers rnounted for upward and downward movements, and fluid-operated means arranged to be moved upwardly by the pressure of operating fluid thereon to raise said support and thereby to position the wipers relatively to the last before they wipe the margin of the upper inwardly and thereafter to be moved downwardly by pressure of the fluid thereon to increase the pressure of the wipers on the margin of the upper over the insole.

5. In a lasting machine, wipers for Wiping the margin of an upper about an end of a last inwardly over an insole on the last, means supporting said wipers for movement heightwise of the last, and fluid-operated means for applying to .said Wipers in engagement with the margin of the upper over the insole force dependent upon the pressure of the operating fluid and tending to move them height-wise of the last to increase their pressure on the margin of the upper.

v6. In a lasting machine, wipers for wiping the margin of an upper about an end of a last inwardly over an insole on the last, a support for said wipers mounted for movement heightwise of the last, and fluid-operated means mounted for movement heightwise of the last by the pressure of operating fluid thereon and arranged to act on said Wiper support with force dependent upon the pressure of the operating fluid to increase the pressure of the wipers on the margin of the upper over the insole.

'7. In a lasting machine, wipers for wiping the margin of an upper about an end of a last inwardly over an insole on the last, a support for said wipers mounted for movement heightwise of the last, and a pair of fluid-operated pistons connected respectively to the opposite side portions of said support and arranged to act thereon with force dependent upon the pressure of the operating fluid to increase the pressure of the wipers on the margin of the upper over the insole.

8. In a lasting machine, wipers for wiping the 1 margin of an upper about an end of a last inwardly over an insole on the last, means supportin d wiper i r movemen h i hiwi of the ast im -o er mean appl n to said :wipers in engagement with the-margin of theupper over the insole force dependent upon the pressure of the operating fluidand tending tomove them heightwise of the last to increase their pressure on the margin ofthe upper, and

spring-means arranged to actadditionally onthe '-wipers to increase-their pressure on the margin of the upper,-said spring means being adjustable :to-vary thepressurethus applied by the wipers.

. vby pressure of operating fluid thereon, mechanism for moving the wipers heightwise of the last into positions for wiping the margin of the upper inwardly over the insole by the movement of said fluid-operated means in one direction and for increasing the pressure of the wipers on the margin of the upperover the insoleby movement ,of said means in the opposite direction, a spring arranged to be subjected to stress by the movem-ent of the fluid-operated means in said one direction for {thereafter further increasing the pressure of the wipers on the margin ,of the upper and means adjustable to vary the stress of saidspring and thereby to vary the pressure thus applied by the wipers.

10. .In a lasting machine, wipers for wiping the margin of an :upper about .an end of a last inwardly over an insole on thelast, a support for said ,wipers mounted for movements in opposite directions heightwise of the last, fluid-operated means movable in opposite directions successively .bythepressura of operating fluid thereon, mechanism for movingsaid wiper support to position the wipers relativelyto the last by the movement of said fiu'id operated means in one direction and ,for moving-said support ,reversel-y' to increase the pressure of the wipers on the margin of the upper over ,the insole .by movementof said means in the opposite direction, a spring arranged to be compressed by a portion only of the movement of the fluid-operatedmeans in said one direction for thereafter further increasingthe pressure of the ,wipers on the margin of the upper, and ,means adjustable to vary the-compression of said spring ,and thereby ,to vary thelpressure thus applied by the wipers. 1

11. In a lasting machine, the combinationwith means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about the toe end of the last inwardly over the insole, a support ,for said wipers mounted for upward and down- ;Ward movements, fluid-operated means for moving said support upwardly to position the wipers relatively to the last before they wipe the margin of the upper inwardly over theinsole and for thereafter forcing ,the wipers downwardly by the pressure of the operating fluid to'increase their pressure on the margin .of the upper over the insole, a spring arranged to be moved bodily upward by the upward movement of the wiper support, a member toward which the spring is thus movable, said member being arranged to compress the spring in response to the upward movement .ofsaidsupport near the end of that movement to cause the spring thereafter further to increase the downward pressure of the wipers on means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about an end of the last inwardly over the insole, a support for said wipers, means movable to raise said wiper support to carry the wipers upwardly into positions for thus operating on the upper, the wiper support being arranged to be moved thereafter farther upwardly against the force of gravity relatively to the means for thus raising it in response to pressure of the upper on the wipers as they are moved inwardly over the insole, and means subject to the pressure of operating fluid for partially counterbalancing by the pressure of the fluid the weight of said support and of the parts thereon as the support is thus moved farther upwardly.

13. In a lasting machine, the combination with means for positioning bottom upward a last ha* ing an upper and an insole thereon, of wipers for wiping the margin of the upper about an end of the last inwardly over the insole, a support for said wipers, means movable to raise said wiper support to carry the wipers upwardly into positions for thus operating on the upper, connections between said means and the wiper support for thus raising it comprising members relatively movable to permit the wiper support further to be raised against the force of gravity in response to pressure of the upper on the wipers as they are moved inwardly over the insole, and additional means subject to the pressure of operating fluid and arranged to act through said connections partially to counterbalance by the pressure of the fluid the weight of the wiper 1;

support and of the parts thereon as the support is thus moved farther upwardly.

14. In a lasting machine, the combination with means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about an end of the last inwardly over the insole, a support for said wipers, fluid-operated means for raising said wiper support to carry the wipers upwardly into positions for thus operating on the upper, the wiper support being arranged to be moved thereafter farther upwardly against the force of gravity independently of said fluid-operated means in response to pressure of the upper on the wipers as they are moved inwardly over the insole, and additional means subject to the pressure of the operatin fluid for partially counterbalancin by the pressure of the fluid the weight of the wiper support and of the parts thereon as the support is thus moved farther upwardly.

15. In a lasting machine, the combination with means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about an end of the last inwardly over the insole, a support for said wipers, a pair of pistons movable by the pressure of operating fluid thereon to raise said wiper support to carry the wipers upwardly into positions for thus operating on the upper, the wiper support being arranged to be moved thereafter farther upward relatively to said pistons against the force of gravity in response to pressure of the upper on the wipers as they are moved inwardly over the insole, and additional pistons movably mounted in said firstnamed pistons and subject to the pressure of the operating fluid for partially counterbalancing by the pressure of the fluid the weight of the wiper support and of the parts thereon as the support is thus moved farther upward.

16. In a. lasting machine, the combination with means for positioning bottom upward a last having an upper and an insole thereon, of wipers for wiping the margin of the upper about an end of the last inwardly over the insole, a support for said wipers, a pair of pistons movable by the pressure of operating fluid thereon to raise said wiper support to carry the wipers upwardly into positions for thus operating on the upper, connections between said pistons and the wiper support for thus raising it, said connections comprising members movable relatively to the pistons to permit further upward movement of the wiper support against the force of gravity in response to pressure of the upper on the wipers as they are moved inwardly over the insole while the pistons are stationary, and additional pistons movably mounted in said first-named pistons and arranged to act on said members in response to pressure of the operating fluid thereon partially to counterbalance by the pressure of the fluid the weight of the wiper support and of the parts thereon as the support is thus moved farther upward.

BERNHARDT JORGENSEN.

No references cited.

Certificate of Correction Patent No. 2,479,575 August 23, 1949 BERN HARDT JORGEN SEN It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows:

Column 6, line 15, for the patent number 2,364,685 read 2,354,685;

same may conform to the record of the case in the Patent Qfiice. Signed and sealed this 28th day of February, A. D. 1950.

THOMAS F. MURPHY,

Assistant C'ommissz'oner of Patents.

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