US1365221A

US1365221A - Method of securing soles to last-bottoms

Info

Publication number: US1365221A
Application number: US51099A
Authority: US
Inventors: Charles C Blake
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-09-16
Filing date: 1915-09-16
Publication date: 1921-01-11
Anticipated expiration: 1938-01-11

Description

c. c. BLAKE.

METHOD OF SECURING SOLES T0 LASI BOTTOMS.

APPL1 CATION FILED SEPT. 16, 1915.

1,365,221. Patented Jan. 11,1921.

UNITED STATE PATENT OFFICE.

CHARLES C. BLAKJa'oF BRO-UOKLINE, MASSACHUSETTS.

METHOD OF SECURING SOLES TO LAST-BOTTOMS.

To all whom it may concern: p

Beit known that I, CHARLES C. BLAKE,

a citizen of theyUnited State's, residing-at Brookline," in the county of Norfolk and State of Massachusetts, have invented a new and useful Improvement in Methods" of Se curing Soles to Last-Bottoms, of which the following is a specification.

The present invention relates to the manufacture of boots and shoes;

In the manufacture of shoes the insoles of welt shoes and the-better grades of McKay shoes, and the outsoles of-turn shoesfiare secured to the lasts used in the shoe bottoming operations by tacks driven deeply into the bottoms thereof. L The use of these tacks greatly damages the lasts,--requires*separate operations for their insertion andyremoval,

and necessitates the servicesof a reliable inspector to insure that. alltheso1e-tacks are, removed. -,U;sually the soles aresecured to the lasts by a fewtacks driven along the median" line of the; sole! This practice makes it d-i'fiicultfof the sole to conform to the bottom of the last. Moreover,fasg the margin of the sole is free, special precautions must be taken to prevent it from buckling underthe strains of the pullingover and lasting operations. 1 These precautions usually take the form ofa sole-rest for engaging. the margin' ofthe sole near the operating point, of mechanism for'actuating the pulling-over or lasting pincer duringthe updraw movement in a direction slightly away from the edge of thesole so a'sto prevent the upper: from dragging over the edge'ofthe sole an'dthus causing the margin of the sole to buckle, or of special last constructions. Furthermore it:iS necessary to fill the holes made inthe sole by the sole tacks with rubber'cement if it is desired tojprevent-the seepage of water therethrough and thefconsequent wetting ofthe "wearers feet. Objviously. the use of tacks for securingsolesw'to thebottom' ofshoe lasts seriously affects the cost of making shoes. v

One objectof the present inventionis to provide *a simple, cheap "-and effective method of securing. the soles to the bottom of the lasts. K1 1 f I To thewaecomplishment of-ithisobject.v a

' feature of the present invention contem platesathe cementing "of the soleto' the bottom of the last. f By this: method: the useof Specification of Letters Patent. Patented J an, 11, 'Application filed September 16, 1915. Serial No. 51,099. i

hesive. carrierlinterposed between the 1 and the bottom of'the last;

tacks is obviated, the sole readily conforms to the shape of the last bottom, the sole is not perforated, and all danger of the sole buckling'under the strains of the lastin operationis avoided without the aid of a ditional mechanism or. apparatus.

Broadly considered merely the margin of the sole maybe cemented to the bottom of the last. It is preferred,however, to secure the sole to the bottom of the last at contiguous points distributed over the entire contacting surface of the sole and last. This mannerof securing the sole to the bottom of the last forms. aninip'ortant'feature of the present invention.

e In its broadest aspectsthe invention .contemplates interposinggthe. adhesive. between the sole and the bottom .ofthe last in any suitable manner found desirable *or expeclient. For economlc reasons it 1s preferred to interpose a carrier" of; the, adhesive between the soleand the bottom of the last as the proper amount of adhesive maybe loaded on the carrier to make a good joint I without waste.

-. Heretofore in preparing soles for the .shoe' bottoming operations itthas beenthe practice to roughly die out the soles and then bringthem to the required shapein a rounding machine before they are secured to "the bottom of the .last. With this method variations occur in the $016 which prevent its ,proper' fitting to the last bottom. I

the advantages of which will be readily.

understood by those skilled in the art.

The various features of the presentinvention will be readily understood from an inspection. of the accompanylng drawings, inwhic'hp 1 v Figure 1 is an elevation showing the "adsole F ig. 2 is anelevationshowing the sole secured to the bottom-of the; last l r Fig. 3 is a plan of the roughly died out sole; and

Fig. 4c is a plan of a sole trimmed to the edge of the last.

In the illustrated embodiment of the invention the roughly died out sole 1 which is to be secured to the bottom of a last 2 is first provided with a coat of shellac and is then tempered by immersion in water. The shellac prevents the wetting of the grain side of the sole which is theside exposed in the finished shoe.

The adhesive employed to secure the sole to the bottom ofthe last is para'flin. In order to introduce the paraffin between the sole and lastin a quantity sufficient to make a good joint without waste the paraffin is carried by a sheet of surgeons gauze or cheese cloth 3. The gauze is carried in a roll 4: rotatably mounted on a bracket 5 conveniently positioned near the operating point. A portion of the gauze isdrawn from the roll and passed between a pair of rolls 6 and 7 into a bath 8 containing the hot paraflin. From the bath 8 the gauze passes between the roll 7 and a third roll 9 which strips the gauze of superfluous adhesiveu The gauze loaded with the adhesive isxthen placed in position on the'bottom of the last. l

The roughly died out sole is now placed in position over the gauze and pressed down thereon. Preferably the sole pressing op eration is performed in a sole laying machine which is provided with a laying pad such as disclosedin application for Letters Patent of the United States, Serial No.

789,325, filed byme September 11, 1913.

After. the roughly died out sole is set in position on the last bottom the projecting margins of the sole and gauze are trimmed to the edge of the supporting last. Obviously this manner of rounding the sole must be productive of a sole which accurately fits the bottom of the last. M

The sole may be stripped from the last at any time after the sewing operation. Preferably the sole and last are separated prior to the heeling operation as the shoe is heat ed to dry the outsole in preparation for this operation and advantage maybe taken of this heating of the shoe to melt the paraflin sufficiently to separate the sole and last.

It will. be readily understood that any adhesive material may be employed for Se.

curing the insole to the last bottom. I prefer to use parafiin as ithas the properties of forming a thin film upon the gauze and of quickly setting. In fact 'the'laying of the sole upon the parafiin chills it sufficiently to make the operations'ofattaching and setting the sole upon the last bottom substantially simultaneous. Obviously parafiin is an economic material to use. The use of parafiin also permits the last and sole to pass directly to the next operating station as an intermediate drying operation is not necessary.

Vhile the illustrated embodiment of the present invention is directed to a method for use in making the shoe devised by me, it will be apparent to those skilled in the art that the methods herein disclosed may be advantageously employed in the manufacture of other kinds of shoes, such for instance, as turns, McKays and Goodyears.

.anadhesive'carrier on the bottom of the last and pressing a sole upon the adhesive carrierto join the sole to the last, substantially as described. i

"2. That improvement in the art of securing solesto lasts which consists in loading a carrier with the proper amount of adhesive to make a good joint witho'utiwaste, placing the loaded carrier upon the bottom of the last, and pressing a sole upon the carrier to join the sole to the last, substantially as described.

3. That improvement in the art of securing soles to lasts which consists in saturating a sheet of fabric with an adhesive,

placing the saturated sheet upon the bottom of a last, and pressing a sole upon the sheet to join the sole to the last, substantially as described.

4. That improvement in the art of'secur- 'ing soles to lasts which consists in interposing between the sole and the bottom of the last a sheet of fabric saturated with an adhesive, andpressing the sole, sheet and last together, substantially as described.

i 5. That improvement in the art of propa-ring soles for the shoe" bottoming operations which'consists in roughly dieing out the soleyplacing a sheet of fabric saturated with an adhesive upon the bottom of a last, pressing the roughly died out sole upon the sheet of fabric to join the sole to the last, and trimming the projecting margins of the sole and sheet of fabric on the bottom of the last tothe edge thereof, substantially as described; i i

6. A step product of the last and sole assembling operation in ther manufacture of a shoe comprising a last and a soleseoured to the bottomlof the last by an adhesive.

7. A step product of the 1ast andlsole assembling operation in the manufacture of a shoe comprising a last and a sole secured to the bottom of the last by parafiin.

8. A step product of the last and sole assembling operation in the manufacture of a shoe comprising a last, a sole, and a sheet of fabric saturated With an adhesive securing the sole to the last.

9. A step product of the last and sole as 10 sembling operation in the manufacture of a shoe comprising a last, a sole, and a sheet sembling operation in the manufacture of a shoe comprising a last and a sole secured thereto by a fastening means whlch prevents the buckling of the margin of the sole under the strains of the lastin operation.

CHAR ES C. BLAKE.