US2388426A - Sole attaching press - Google Patents

Description

Nov. 6, 1945. K. w. MACDONALD SOLE ATTACHING PRES S Filed Jan. 20, 1944 4 Sheets-Sheet l lill Il I- lll.

Nov. 6, 1.945. K. w. MACDONALD SOLE ATTACHING PRESS 4 Sheeis-Sheet 2 Filed Jan. 20, 1944 Inverzor, [fe/*2.116% Wwf/daim 4 Sheets-Sheet 5 f7 vert 7021 m ZMafdana/Zd ,M

Nov. 6, 1945. K. w. |v|Acl or-1AL|z y I SOLE ATTACHING PRESS Filed Jan. 2o, 1944 4 Sheets-Sheeil Filed Jan. 20, 1944 I K. w. MACDONALD SOLE ATTACHING PRESS Nov, (i,` 1945.

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Patented Nov. 6, 1945 SEE ATTACHING PRESS Kenneth-W.. Madonald, Winchester,-.Mass.,-. as-

signor to Compo'Shoe Machinery Corporation, Boston, `Mass., a corporatomof Delaware Application January 20, 1944, Serial No. '518,938

'9Claims. (CDR-G33) factory. for the; -reasonthatnthe diaphragmssex- .pand .ortballoon :excessive1y-:-outside Athe contour of theshoeixbettom thus'rolling thecedge. of. the sole "upward i which bis :undesirable :fespeeially ;.around.. the forepart; ande heel" portionseofeextension edge.; shoesiof .thewel'tedi type. Only nat' the :inside shank-i portion; off-the; shoe. 'it :iside'sirable 13o-:Wrap or'. curl. .the sole and =Welt fupwardizagainst the. shoeupper.

A: vfeature ofv this. invention residesiinv the-provision of diaphragm .'re'straining :members .so'L

- shaped that 'thetdilation fof fthe sole .pressing diaphragm .is restrained-more at'the heeLand forepart of ashoeathan at .theshankrwhe-reby the' dilation -lofrltheidiaphragmz corresponds fto" the :contoun ofithershoelbottom.

eltfriholddowns :areeprimamily used dor apply- `ing pressure.:totihelweit:orso'lefextensiuns fofr-a yshoe-and in some cases theyiare" reliedzontdprevent curling of the sole extension, by using'zan f exeessiveapressuretolreaot .againsttlthessolezpres- A`"sure a applying mnedium. l:Such iprior rholddowns irhavesbeen'foomplieatediin structureaandzhavefrequired elaborate po'sitioning and :ladine-ting 1 mechanisms. .E lilurthermore y:V these iiprior :devices fdamage.itheuweltand/or: soleoeictensionfias .they areslnotxeapable: of-zdstribiiting.;theiappliedpres- 1 sure. uniformly.

fAnother'A .feature of this rinverfionr residesiin the 1 lprovi'sionvot 1an? inlatableI-baglas a-.aw'eltzholddown whiehf i applies:.pressurezuniforrnly.to the fweltt or solewextension.

""Gtherf Afeatures -f this :invention: fresidei 1in the 1provision-f a' pivotedtboxenelosingaanzinflatabie Welt?h'olddown bagpandwinlthe provision of-'xa zrpivoted, ratchet iadjustedheel rrpost shaving a' yielding -lastengagingfplate the ib'oxfiand .1t-he heel postV being Ladapted to'lbef; swungsdown i and latehe'd following the insefrtiorr bis ai shoe into the press 1 andfpric'r' 1to1 the di'latiorr.'ofithe .soles-pressing diaphragmiand thelinflationot thefwelthoiddown-bag.

An object of?. the v`invention: Lis .Lto rrestrain :the dilation-fof la solef=pressingf diaphrag'mrmoresat the :heell and forepart ofr-alshoe thanlatithefshanh innofthervobject of theLinventionzistto: apply :any desired .uniformi pressure to; aaveltl: orrlso'le .extension fof a shoe by an inflatable pressingcbag. .Other `vobjects .Ofi the invention.` are vto"-'sIHl1`l1ify,

@and toximprove the :performance of, shoe. presses :having '.dilatable isole pressing diaphragms and welt holddowns.

The :inventionwill'nowrbefdesoribediwithrrierence? to. .the .drawings,` of which:

i Eig: l'ris. a sideeelevation partially sinseotion; fof ar-shoe press embodying` this invention;

Fig 2 is iasectional .plan-yiew:takenV along: the lines 2-;2. of- Fig.:.1;

.'Fig.. 3 :isi'a seetionalfview taken along. the lines `.3--3foflig.' 2;

'f-.Figfl -is.=a=se'ctional vieWtaken `along the. lines =4-4 oisFig.. 1;

-r-lig 5 is afsectionfsimilar toFgfl `exceptzthat Y the:solepressureidiaphragm is. shown'dilated and thefwe'ltaholddownfbag .isshown inflated, .and

:Figi 6 is asseotionalf View takenialong. theV :lines =6-6 of Figi.

:.'Referring tov .the 'drawings and. rstwto.'1?lgs.`.. 1, 2 and 4 thereof ,n there is shown.a'shoefpressfhav- J ing-'a 1basel framescasting IDi having the vertical 25:

'Thewdiaphragm -f I3, the .extensions I I --andtthe "lower Wall fof the =basef I0 `form a diaphragm chamber v Ill into :which` air -may be ini'eoted through the valveA I5 for '-dilating the diaphragm .asuwill -be described.

.The uppery base castingy Ihas the lower hori- -Zontalextensionr I 'I' resting upon the :upper marf ginal; surfaces of .thediaphragm I3 and has the upper horizontal surface I8 upon .which the lower surfaces of the welt holddown bag retaining Abox I9 rest,l as. illustrated by Figs. 1 andfl, When .the shoe to becernented vhas been inserted'ready ior the sole and Welt pressing operations.

:The resilient Welt 'holddownbag s20 is contained kwithin the retaining Ybox I9 and is. adapted tobe inilatedbyair applied ,through the valve 2| :and the tting22 as will bedeseribed. The wall oflthe ybag/2li has Varying thickness-andisxso vshaped that when thebag is inflated, the thinnest portion' will expand .'down. and towards the Welt .crease ofA a shoe held in the press, rst, thus. pre- .venting thepossibility of theair bag being forced -:between the sole. and` the welt. .Thebag mayvbe constructed kof 1 rubber .or equivalent material which cannotdamage the -nish oa shoeso-that speedy positioning of a'. shoe is assured.

L'Ihe box 'IS is; hinged'zatrl about thev pin 2f! `.andi isnadapted prio-r to .the insertion ofxashoe in the press, to be swung upwardly as illustrated generally by the dashed lines of Fig. 1. The spring 25 has its lower end attached to the screw 26 which is threaded into the upper surface of the box I9, and has its upper end attached to the screw 21 which is threaded into the yoke 28. The spring 25 serves to retract the box I9 to its upward position when a latch to be described is released.

The band 36 is attached by the bolts 3l to the opposite sides of the base I and extends over and above the base I0, and supports by the bolts 32, the heel and toe post yoke 28.

The yoke 28 is drilled to receive the toe post adjusting shaft 33 which is threaded at its lower end into the toe post 34. The toe plate 35 is attached to the post 34 and the toe rubber 3B is attached to the underside of the plate 35. The hand wheel 31 serves to rotate the shaft 33 and to raise and lower the toe post 34 and the toe rubber 36 which contacts the toe of a shoe in the press. The toe post thus may be adjusted to obtain the degree of dilation of the diaphragm I3 which is desired. For example, less diaphragm dilation would be desired on a at bottom last than on a rocker bottom last.

The heel post supporting member 40 is attached to the yoke 28 by the bolts 4I and 42 and the two similar heel post supporting arms 44 are each pivotally attached at one end thereof to the member 40 about the bolt 45 and at the other end thereof are each pivotally attached to the heel post support 46 about the bolt 41. The heel post plate 48 is yieldingly attached to the heel post support 46 by the screws 49 which are threaded into the heel post plate 48 and which are freely slidable in aligned openings drilled in the base of the support 46. The spring 50 extends between the heel post plate 48 and the support 46 in recesses therein and while forcing the support 48 and the heel post plate 48 apart, yields under the pressure of the last I when the diaphragm I3 is fully dilated as will be described.

The ratchet 52 is formed on the outer end of the heel post supporting member 40, and the pawl 53 which is pivoted on the pin 54 to the arms 44, engages the ratchet 52 when the heel post plate 43 is against the last 5I as illustrated by Fig. 1. The member 55 attached to the pin 54 is adapted to be depressed manually for releasing the pawl from the ratchet when the pressing operations are concluded. The springs 56 are secured to and extend between the pawl 53 and the arms 44 and serve to urge the pawl towards ratchet engaging position. The springs 51 are secured to and extend between the arms 44 and the member 48 and serve to lift the arms 44 and the heel post assembly to the position indicated by the dashed lines of Fig. l when the pawl 53 is released.

The lock latches 88 are pivoted about the pins 6I which are journalled in the upper base casting I6 and are adapted t0 engage the lock pins 62, which are attached to opposite sides of the air bag retaining box I9, when the box I9 is in shoe engaging position as illustrated by Fig. 1. The lock latches 60 are adapted to be manually or otherwise disengaged from the lock pins 52, by clock-wise rotation thereof (with reference to Fig. l of the drawings) and when they are disengaged, the spring 25 swings the box I9 upwardly about the pivot pin 24 to the position indicated by the dashed lines of Fig. l.

As illustrated best by Figs. 5 and 6, the upper base casting I6 forms a restraining cover for the diaphragm I3, its under surfaces being so shaped that the dilation of the diaphragm I3 is restrained more in the heel and fore-part portions than in the shank portion of a shoe positioned in the press. With reference to Fig. 5, the lower walls 65 of the upper base casting I6 limit the upper movement of the diaphragm I3. The walls 65 continue uniformly in the heel and toe portions of the press but in the shank portion are replaced as illustrated by Fig. 6, by the wall 66 on one side and the wall 61 on the other side which permit greater upper movement 0f the diaphragm I3, which greater movement results in the sole being curved more and pressed more tightly at the shank than in other portions of the shoe whereby the sole conforms more accurately to the contour of the shoe bottom.

At the start of a shoe pressing operation, the heel post plate 48 and the welt holddown bag retaining box I9 will be swung upwardly as illustrated by the dashed lines of Fig. 1. The welt holddown bag 20 and the diaphragm chamber I4 will be deflated. The toe post 34 will have been adjusted by movement of the hand Wheel 31 so that the toe rubber 36 is in theproper position for the particular shoe to be worked upon.

'I'he operator then places a shoe in the press and pulls down the heel post assembly so that the plate 48 rests against the heel portion of the last 5I whereupon the pawl 53 engages the ratchet 52 maintaining the heel post in position. The welt holddown retaining box I9 is then swung down and the lock latches 60 positioned over the lock pins 62 for locking the box in position. Air is then admitted through the valve tting I5 into the diaphragm chamber I4, and the diaphragm I3 is dilated and applies pressure to the underside of the sole of the shoe as illustrated by Fig.

l, and raises the shoe upwardll7 a distance determined by the positions of the heel and toe posts which distance may, for example, be onehalf an inch. The spring 50 permits the heel post plate 48 to yield that distance.

The operator then admits air through the valve fitting 2l into the welt holddown bag 20 which,

upon inflation, first expands over the shoe into the welt crease, and then applies downward pressure against the welt as illustrated by Figs. 5 and 6.

Although separate ination valve fittings have been illustrated for separately inating the diaphragm chamber and the welt holddown bag, the welt holddown bag may be connected to the diaphragm chamber through a reducing valve and the inflation of both chambers and bag may be accomplished through a single valve tting as disclosed in the Fred Dawson Patent No. 2,348,060.

While one embodiment of the invention has been described for the purpose of illustration, it should be understood that the invention is not limited to the exact, apparatus and arrangement of apparatus illustrated as modications thereof may be suggested by those skilled in the art without departure from the essence of the invention.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a shoe press having a member for engaging the toe of a lasted shoe, an arcuate welt holddown retaining member having a horizontal llange extending around and spaced from said toe engaging member, and an arcuate inflatable welt holddown bag held by said retaining member and limited in its movement thereby- 2. In a shoe press having a sole pressing pad and a member for engaging the toe of a lasted shoe, an arcuate welt holddown retaining member having a horizontal iiange extending around and spaced from said toe engaging member, an arcuate inflatablewelt holddown bag held by said retaining membera'nd limited in its movement thereby, and means pivoting said retaining member to said press for swinging movement towards and away from said sole pressing pad.

3. In a shoe press having a sole pressing pad and a member for engaging the toe of a lasted shoe, an arcuate welt holddown retaining member having a horizontal flange extending around and spaced from said toe engaging member, an arcuate inflatable welt holddown bag secured to the flange of said retaining member, and means pivoting said retaining member at its toe end to said press for swinging movement towards and away from said sole pressing pad.

4. In a shoe press having a member for engaging the toe of a lasted shoe, an arcuate welt holddown retaining box extending around and spaced from said member, an arcuate inflatable welt holddown bag in said box, an inflatable sole pressing diaphragm, and means forming a passage between said bag and said diaphragm into which passage said bag expands and contacts said diaphragm when said bag and diaphragm are inflated.

5. A shoe press comprising an arcuate inflatable welt holddown bag, an inflatable sole pressing diaphragm, and means forming a passage between said bag and said diaphragm into which passage said bag expands and contacts said diaphragm when said bag and diaphragm are inflated.

6. In a shoe press having a member for engaging the toe of a lasted shoe and a member for engaging the heel of the shoe, an arcuate inflatable welt holddown bag around and spaced from said toe engaging member, one end of said bag extending adjacent said heel engaging niember on one side of said press and the other end of said bag terminating substantially short of said heel engaging member on the other side of Ysaid press, an inflatable sole pressing diaphragm, and diaphragm retaining walls for limiting the movement of said diaphragm when same is inflated, towards said bag, one of said walls opposite said 1 one end of said bag being arranged to permit said diaphragm to move further towards said bag than permitted by the other of said walls.

7. In a shoe press having a member for engaging the toe of a lasted shoe and a member for engaging the heel of the shoe, an arcuate inflatable welt holddown bag around and spaced from said toe engaging member, oneend of said bag extending adjacent said heel engaging member on one side of said press and the other end of said bag terminating substantially short of said heel engaging member on the other side of said press, an inatable sole pressing diaphragm, retaining walls for limiting the movement of said diaphragm when same is inflated, towards said bag, one of said walls opposite said one end of said bag being arranged to permit said diaphragm to move further towards said bag than permitted by the other of said walls, and means forming a passage between said bag and said diaphragm into which passage said bag expands and contacts said diaphragm when said bag and diaphragm are inflated.

8. In a shoe press having a member for engaging the toe of a lasted shoe, an arcuate welt holddown retaining box extending around and spaced from said member, an arcuate inatable welt holddown bag in said box, means pivoting said box at its toe end to Said press, an inflatable sole pressing diaphragm, and means forming a passage between said bag and said diaphragm into which passage said bag expands and contacts said diaphragm when said bag and diaphragm are inflated.

9. In a shoe press having a member for engaging the toe of a lasted shoe and a member for engaging the heel of the shoe, an arcuate welt holddown retaining box around and spaced from said toe engaging member, means pivoting said box at its toe end to said press, one end of said box extending adjacent said heel engaging member on one side of said press and the other end of said box terminating substantially short of said heel engaging member on the other side of said press, an arcuate inflatable welt holddown bag in said box, an inflatable sole pressing diaphragm, and diaphragm retaining walls for limiting the movement of said diaphragm when inflated, towards said bag, one of said walls opposite said one end of said box being arranged to permit said diaphragm to move further towards said bag than permitted by the other of said walls.

KENNETH W. MACDONALD.

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