US2607056A

US2607056A - Apparatus for force lasting shoes

Info

Publication number: US2607056A
Application number: US133560A
Authority: US
Inventors: Pringle Allan Shaw
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1949-12-17
Filing date: 1949-12-17
Publication date: 1952-08-19
Anticipated expiration: 1969-08-19

Description

Aug- 19, 1952 A. s. PRINGLE 2,607,056

APPARATUS FOR FORCE LASTING sHoEs Filed Dec. 17, 1949 45 3 n'. Am

/nz/enzof Allan 3 Pringle Patented Aug. 19, v`1952 Y arellenar.Us.,Fo-iti FORCE LAsfrlNG sirop-si V'Allan Shaw Pringle, Galt, Ontario', Gal-nada, as-r signer to Unitedl Shoe Machinery Corporation, Flemington, N'r J., a. corporation.. of New'Jersey" Application December 17, 1e4aserialino.. issgstf 3 era-ima ThisV invention relates to apparatusror shape ing the'heel end portions of shoes upon their lasts and is herein illustrated as embodied in apparatus for effecting relative heightwise movement of the heel end .portion of a/sh'o'e and a last mounted therein thereby to perform a force lasting or slip lasting operation upon the shoe. The invention is illustrated inthe. vdrawing as incorporated in apparatus' designed primarilvfor operation on shoes of the type illustrated. in United States Letters Patent No. "2,385,743, granted September 25, 1945, on an application led in the name of Samuel B. Vaisev.` It is' to be understood, however, .that the' invention is not limited in its scope to' apparatus` constructed and arranged to' operate on shoes of the type illustrated in the Vaisey patent but is appli'- cable to apparatus for performing a force lasting or slip lasting operation on any and 'all shoes having closed heel ends;

It is an object ofthe present' invention to provide apparatus for' effecting relative height'- wi'se movement of the heel end portion' 'of` a shoe and a last mounted therein.' More specifically it is thev object of the invention to' effect such relative heightwise movement oi' 'a' shoe and a last mounted therein in order to force the last heightwise thereof into intimate contact withv the interior or foot facing' surface of the shoe bottom. i

With the above obects in View the' present invention in one aspect" thereof comprises' apparatus consisting ofa `standard having a gripper jaw' mounted thereon and-constructed and ar-l ranged to engageV the topr margin off-a shoe and to gripit againstl the outerl surfacel of the standard andjh'old it during' the'shoe-shaping' operati-on. For `closing' the'V gripper'jaw on the shoe a plunger is mounted in a guidewayentend--v ing from' top to bottom of the standard, said plunger having mounted thereon means operable to effect the closing 'of' the `gripper jaw on the shoe-f. For imparting a` Shaping operation. to the shoe there is mounted in the upperl portion of the guideway a slide having mounted thereon a member constructed and arranged toV engage the cone' portion of a last mounted in the shoe. 'Theslide is' moved upwardly bythe plunger to effect the shoeeshaping operation, the operation of the slide being timedto commence after the plunger has operated to' bring the gripper jaw into gripping engagement vwith the upper.

The invention will now be illustrated with reference to the accompanying drawing which discloses in sectional elevation apparatus ernbodying the features of the present invention.

The drawing illustrates a manual-1ykv operated bench-mounted device `for forcing' a last upwardly into the heel portion of av shoe to bring thev sole" face of the last into intimate contact with the foot-facing surface of' the shoe bottomA thereby to impart to the lshoe itsY final shape. vIn the drawing the illustrated apparatus is shown' as operating on" a shoe of' the'tvpe disclosed in the' Va'isey patentA abovereferred to, the back' line portion of theshoe' being extended to' provide a tab by which the' shoe is gripped and held while the last isl forced upwardly vagainst the interior of the shoe bottom. l

In thev drawing the numeral 'zL identities af standard the base' t ofV which is secured tov a bench 4' by screws 6*. Thei standard has a cerr-A tral vertical bore 8 in the upper portion of which` is mounted a sliding shaft I0 and in theflo'wer portion of` which' is mounted a plunger l2). 4The shaft i0 'is provided with a ange t4 which' is' normally held" by gravity against the topf ofthe standard 2. The upper surface of the flange I4 serves as a support fora last such; forerample;v as the" last t6 illustrated in thel drawing The flange I# engagesv the cone face of the last vand" the taperingV Upper endV portion t8j oi the slide' ing shaft IU extends upwardly' into' the thil'nble 2l!l i'nthe' rear portion or the last; In order to prevent the sliding shaft' I from be'ing inad'` vertentl'y moved upwardly out of the standard, the. shaft is'provided with a longitudinal slot' 22 and a pin 24' is mounted in the standard and arranged to extend through said slot.

For' holding the rear` end portion of the shoe against upward movement, a gripper jaw' 26- pivot'allv` mounted on a cross pin 28 mounted in ears formed in the' standard 2", lone of said'` ears being identinedb'y the numeral A 30". The work engaging' face 32" of the gripper jaw is corrugated as is alsothe portion 34 of the standard adjacent to the gripper jaw'. The rear' portion offtheillustratedshoe 36 is rentended vertically to providey a tab' 3sl which is positioned between the gripper jaw 2l6'A and the corrugated surface or' the standard. asshown the drawing'.

For actuating the shaft ltr and. the gripper' jaw 2T6`in predetermined time relation to each other a 'treadle' 4`0`is pivotall'y' mounted between upwardly extending ears of a bracket 42 secured to the. floor benr'ea'th the bench 4. A 'connect'-v ing. means, siicn,'for"exaniple, asthe illustrated exible wire cable 4'4 is' connected to the' tre'adle' and extends upwardly therefrom over a pulley 46 pivotally mounted between the ears of a bracket 48 xed to the base 3 of the standard 2 and extending downwardly therefrom into an Amounts the head 66 of the plunger 58.

screws 56 carries a plunger 58 constructed and arranged to engage the bottom surface of the gripper jaw. in a bore E formed in an offset upward extension 62 of the bracket 54. The bore 6U communicates with a counterbore 64 which extends downwardly to the lower extremity of the extension 52 and The head 66 is axially bored to receive a spring 68 the lower end of which is mounted on a stud projecting upwardly from a threaded plug 'IB mounted in the internally threaded lower end portieri of the extension 62. The 'gripper jaw 25 is nor? mally held in its open position illustrated in the drawing by a spring 12 seated in a bore formed in an extension I4 of the gripper jaw and arranged to bear against the top surface of an outward extension 'I6 of the standard. In order to provide clearance for the operation of the plunger 58, the extension 'I6 has formed therein an open end slot 18. In order to provide clearance for the vertical movement cf the bracket 54 the standard 2 has a slot 85 formed therein and arranged to communicate with the borel $3.

When the gripper jaw is in its retracted position the bracket 54 rests against the bottom end face of the slot 80 and is held against upward movement by a spring 82 surrounding the lower portion of the plunger I2 and confined between the base of the standard 2 and the collar 5G mounted on said plunger. The bracket 54 is formed with parallel sidefaces which have sliding engagement with the vertical walls of the slot 80 formed in the standard and thus maintain the width-wise position of the plunger 58 and the orientation of the 'collar 5G. In or.

dei" to permit the gripper jaw 26 'to close and grip the work before upward movement is im-A l end face of the shaft I8 to an extent commensu- 1 rate with the upward movement of the plunger I2 required to close the gripper jaw. Y

In the operation of the' illustrated apparatus a last, such as the last I8 illustrated inthe drawing, is inserted into the shoe 3S and the shoe on its last is arranged in an invertedgpositionV and mounted on a tapering upward' ex tension I8 of the slidingshaft I0. kIn mounting the last on the extension I8 it is so 'orientated that the tab 38 at the rear portion of the shoe is positioned between thegripper jaw 2E andthe corrugated face 34 of the standard 2. After so positioning the shoe, the treadle is depressed to close the gripper jaw 2E on the work and to impart upward movement to the sliding sha-ft I0 in predetermined time relation thereby to force the The illustrated plunger is mounted,

last upwardly and bring its bottom face into in# timate Contact with the foot-facing surface of the shoe bottom.

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

1. Apparatus comprising a standard having a guideway extending from top to bottom thereof, a gripper jaw mounted on the standard and constructed and arranged to engage the top margin of a shoe and grip it against the outer surface of the standard, a slide mounted in the upper portion of the guideway in the standard,Y a member carried by the slide and constructed and arranged to engage the cone portion of a last mounted in the shoe, a plunger slidably mounted in the lower portion of the guideway in the standard, means carried by the plunger and operable by upward movement of the plunger to close the gripper jaw on the top margin of the shoe, and means for effecting upward movement of the plunger first to close the gripper jaw on the shoe and thereafter to impart upward movement to the slide thereby to force the last into intimate contact with the interior of the shoe bottom.

2. Apparatus comprising a standard having Ia bore extending from top to bottom thereof, a gripper liaw pivotally mounted on the standard and constructed and arranged to engage the top margin of a shoe and grip it against the outer surface of the standard, a shaft slidably mounted in the upper portion of the bore in the standard, a member carried by the shaft r' and constructed and arranged to engage the cone portion of a last mounted in the shoe, a plunger slidably mounted in the lower portion of the bore in the standard, a bracket fixed to the plunger, a spring pressed pin mounted in the bracket and constructed and arranged to close the gripper jaw on the shoe during upward movement of the plunger, and an actuator for moving the plunger upwardly iirst to close the gripper jaw on the shoe and thereafter to impart upward movement to the sliding shaft thereby to force the last into intimate contact with the interior of the shoe bottom.

3. Apparatus comprising a standard, a sliding shaft in the standard for lifting a last inv a shoe, a gripper jaw mounted on the standard and arranged to grip the upper of a shoe against the standard, a slide initially spaced from theshaft, and means on the slide for engaging the gripper and forcing it yieldingly against the upper dur` ing initial movement of the slide. further movement of the slide lifting the shaft to force the last into the shoe the upper` of which is held by the gripper.

n ALLAN SHAW PRINGLE.

REFERENCES CITED VZIhe following references are of record in the file of this patent:

UNITED STATES PATENTS Number v Name Date 719,077 Bickley Jan. 2'1" 1903 FOREIGN PATENTS Number Country Date 258,220 Germany Mar. 3l, 1913