US1590737A - Last - Google Patents

Description

June 29 1926. 1,590,737

` D. R. COOPER 4 LAST Filed March 14, 1925 l 2 Sheets-Sheet l ff WWW@ June 29 1926. 1,590,737

D. R. COOPER LAST Filed March A 2 sneets-sheet`2 Patented June Z9, i926.

Unirse; stares DAVID ROBERT COOPER, OF ULTIMO, NEAR SYDNEY, NEW SGUTI-I WALES, AUSTRALIA.

'an i i ridi LAST.

Application filed March 14, 1925, Serial No. 15,472, and in Australia September 4,:1924.

rllhis invention relates to improvements in and connected with lasts, and more particularly to lasts of the type that are adapted to be extended and contracted to permit them to be readily and conveniently inserted into and removed from articles of footwear made thereon, thus economizing 'time and labor and minimizing damage to the boots or shoes in manufacturing operations A last according to the invention is specially durable in construction, and it comprises a fore part, a longitudinally movable heel part permanently connected to the fore part, a detachable intermediate part ofV wedge formation and means for locking said parts to restrain them against independent movement when assembled and the last extended.

Rigidly secured inthe fore part of the last is the forward end of a connecting plate having its rear end slidably accommodated in a recess formed in the heel part. The

heel part is movable on said connectingl plate, Within predetermined limits,to and from the fore part to permit required contraction and extension of the last. After de` tacliment of the intermediate part, the said heel part is pivotal on the connecting plate and when advanced towards the fore part it is permitted to have a slight upwardk collapsing movement which facilitates the contraction of the last to permit ready removal from the footwear.

The replacement of the wedge-shaped intermediate part forces the heel part rearwardly from the fore part, and simultaneously impart-s slight pivotal movement in the opposite Vdirection to said heel part, thus extending the last in correct manner when the assembled parts are positively locked in rigid interlitted position.

Associated with the lastis a lasting block having its upper surface appropriately shaped to support the footwear (not having the heel affixed) when the last is being extended therein, its purpose being to pre clude damage being done t-o the footwear by the operation of extending the last.

Reference is had to the accompanying drawings, wherein z- Figure l is a perspective View of the improved last.

Figure 2 is a longitudinal section of the last as extended and with its components locked together.

Figure 3 is a longitudinal section showing the last contracted following the removal of the intermediate part of wedge formation.

Figure l is a central vertical section of the intermediate wedge part detached from the fore and heel parts.

Figure 5 is a perspective View of a modi lied form of the invention. v

Figure 6 is an end view of the intermediate wedge part of the sectional last seen in Figure 5.

Figure 7 is a fragmentary view in plan showing the sectional last with the intermediate part fitted in position. l

Figure 8 is a longitudinal sectional view illustrating a further modified form of last.

Figure 9 is an elevationshowing a shoe in the course of manufacture with contained last suportedby a lasting block.

Referring to Figures l to 4:, the last comprises a fore part 2, a heel part 3 and a detachable intermediate part 4:. recess 5 is formed centrally in the rear portion of the said fore part 2 to receive the forward end of a. metal connecting plate 6, which is rigidly aliixed in posit-ion to the said fore part by pins or rivets 7.

rlhe heel part 3, having a metal platel inset 8 therein to prevent damage to that section of the last by nails in heeling operations is constructed with a recess 9 to freely accommodate the rear enlarged end of the connectingplate 6 wherein alongitudinal tapering slot 10 is formed. Passed transversely through the heel part 3 and through the tapering slot l0 is a hinge pin 11permanently connecting the said heel part with the plate 6 that is immovably secured at its forward end to the fore part 2 of the last. This means of connection allows the heel part, after detachment of the intermediate part l, to be slidably moved on` said connecting plate to and from the fore part 2, the degrec of longitudinal movement permitted in either direction being determined by the length of the slot 10.

The pin l1 by passing freely through the tapering slot l() also provides a pivotal connection between the heel part 3 and the con necting plate 6. The intermediate wedge part i having been removed from the extended last, the said pin is initially at the rear enlarged end of the slot, when the heel part 3 is capable ofrbeing conveniently advanced toward the fore part 2. As tliesaid pin ap- A vertical l inoval of the cont proaches the forward narrower end ofthe slot, the said heel part is capable of slight Vpivotal movement Vpredctermined lby the depth of the recess'Q and the depth of the enlarged end of the`A connecting plate 6),

such pivotal movement facilitating the reracted last from the article of footwear. Y Y

Replacement of saidintermediate part imparts rearward As'iidable'niovC-Sment to the i heel `mrt 3 on the connecting olate 6 causin y J 7 v c the pin l1 to be rmovedto the enlarged end of the tapering slot l rlhe heel part is then permitted 4slight pivotal movement in the'l opposite direction to bring the assembled last parts in correct relationship, when the upper and lower edges of the rear end of said connecting plate bearvagainstthe Vmetal plate 8 and the bottom ofthe recess 9, respectivelyT-sfee Fifure 2.

Thedet'achableintermediate 'part t of the last is substantially of inverted T-shape compri'singa wedge-shaped vstein or shank hav- ,last yis subjected to `working stresses.

ing "at its YupperY end two opposite horizontal member-s 12 and 113, and provided with a metal reinforcing 'platz-,'12s A S101; 1iis forvrnedfin `the lower end of said wedgesha'ped'stem or shank 'to' enable it to lit snugly over that portionof'th'e connectingpla-te 6 disposed between 'the opposed 'faces of the ffore'and'lie'el I,parts 2 and f3. i Said connectingpl'ate by fitting in said slot thus addi- Y tionally serves to prevent llateral ymovement ter'flyhe'ad20 to bear against a metal washer 2lv seated in said memberr 312. lV hen the screw v'is screwed into the fixed nut 15 kthe components of the extended lastare positively V locked together, wh-ile permitting ready 'detachment 'of Y the intermediate part 4 when the last Vis to be contractedfor removaljfroiii the article of footwear.

The'jheel part B has'a Ymetal lined hole 22 adapted to register with a `hole '23' bored in the rear horizontal mem-ber lof the detachab'le 'intermediate "2l 'and' receive xthejirsual jack-pin 'used inl'stingoperations. s

The 'p'rov'ision in a sectional last. of an intermediate wedge-shaped part fo rined with opposite'ly disposed lnie'mbers adapted :to abut closelya'gainst 'the lfacfes of the fore Aand heel parts and Ireiifforced with a" metal .plate as described lensures said intermediate part and the extended last having the necessary strength to satisfactorily withstand all the strains that are developed in shoe manufacturingoperations. The junctioning corners 24 may be rigl'it-angled or given that curvature which in operation `is found most `desirable to prevent fracture of the last parts under conditions of rough'usage, particularlywhen the last is being extended within a boot orshoe by forcing apart the ffore and heel parts 2 and 3 by the action of the wedgeshaped member 'of the intermedi-atepart 4.

According .to the modified construction of last illustrated iii-Figures V5, 6 'and 7, the intermediate part 4 is ofdovetail formation. It hasvk its opposite faces 25 4and 26 ofsubstantially V-shape and designed to interfit the correspondingly shaped ends `27 -and 28 of the fore part and heel p-arts,'thus ensuring correct alignment ofthe last 'sections 'when assembled and extended. The screw I19 may be'passed in approximately a horizontal` plane through the three parts ofthe last 'to engage at it-s rear end -a nut 15 .fitted .inthe-A heel-part to correctly :look together the components of the last when it is extended. The screwl)7 may have its head V2O seated 'a recess 29 formed at the instep portionof the fore kpart'2 of the last,- anfd vavcord 30 .permanently connects the detachable intermediate par-t e with the heel part 3 to .prevent its l1nis} lace1n'entf or loss in manufacturing operations.

Referring to 'Figure illustra-ting :a sectional last Lprincipallyfor luse in the Vman-nfacture of childrens footwear, whenextended its components are restrained against irndependentmovement by tape-red dowels 21 on'the lhorizontal members 1.2 and 13 of the T-shaped intermediate ,par-t 4 of the last, which dowels fit into tapered-holes 32 Aformed in the fore and heel parts -2'an'd-3, respect-ively, of the last. v

preferably constructed of Wood.,facedwith yaluminium or other metal, but :which Jinay be of .all-metal `oonstimction. This block has its upper surface curved at 534i .and 35 -to-iseat the soleand waist port-ions -o-f a 'boot or shoe A in the 'course of manufacture, :and a straight y `to the article of footwear.

`that Ido claim is:'- l'1. A last comprising Ia .forel-part, a Aoonlos lnec'ting plate secured to and extending rear- I)130 wardly from said fore part, said plate having a tapered slot at its rear end, a heel part having a recess slidably accommodating the slotted end of said connecting plate, a hinge pin on the heel part passing through said tapered slot and a detachable intermediate part slotted to fit over said connecting plate.

2. A last as in claim l and wherein the intermediate part is wedge-shaped to cause the hinge pin to engage the larger end of the 10 p tapered slot in the connecting plate, when the last is extended.

3. A last, as in claim l and wherein, the

intermediate part has oppositey arranged horizontal members vto it beneath and sup- 15

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