US2103062A

US2103062A - Shoe last construction

Info

Publication number: US2103062A
Application number: US74885A
Authority: US
Inventors: George C Clark
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-04-17
Filing date: 1936-04-17
Publication date: 1937-12-21
Anticipated expiration: 1954-12-21

Description

Dec. 2l, 1937. cs. c CLARK 2,103,062

SHOE LAST CONSTRUCTION Filed April 17, 1 936 INVENTOR.

BY Georye (LG/ark PM &5mfin ATTORNEY Patented Dec. 21, 1937 PA ENT] OFFICE l .sHoE TLAST CONSTRUCTION George Clark,"Beverly Hills, Calif. Application April 1'7, 1936,'Serial No. 74,885

invention relates-to improvements in shoe body having a tacking element receiving recess I wherein a tacking element is seated and the side 1 i walls of which recess have integral angular portions'projecting interiorly of the recess and embedded in the tacking element. The tacking element receiving recess is preferably so formed that aside wall of the recess carries an acute-angled '0 lug or rib which projects interiorly of 'the'recess and is embedded in the tacking element.

An important characteristic of this rib or lug is that the lower face of the rib is substantially normal to the sidewall and the upper face of the '51 rib slopes'outw'ardly toward theside wall and upwardly toward the-entrance ,to the recess whereby a tacking 'elementmay be inserted for seating within the recess but once seated therein therefrom.

More specifically, the tacking element retaining rib preferably extends linearly of the side wall of which it is an integral part. It is spaced above the bottom of the recess and below the entrance thereto. It has an outer or upper face which slopes downwardly from the side wall to an edge, which lower face is preferably horizontal. It constitutes an acute angle projection which permits insertion of a compressible tacking strip; yet so embeds itself within the tacking strip as to securely lock the same in place.

Other objects, advantages, and meritorious characteristics of this invention will more fully appear from the following description, appended claims, and accompanying drawing, wherein:

Figure l is an elevation of a last looking at its bottom face,

'Fig. 2 is an elevation of a last partly broken away on the line 2-2 of Fig. 1,

Fig. 3 is a cross-sectional view taken on 3--3 of Fig. 1, and

Fig. 4 is a fragmentary cross-sectional view taken on the same line as Fig. 3 but enlarged and showing the tacking strip removed.

In the figures of the drawing let 10 indicate a is securely locked againstremoval or withdrawal last body which may be formed of suitable metal and providedwiththe required tacking elements and strips. This invention relates to the looking or securement of the tacking elements in place. It is understood that. the last body would carry such number of these elements as-was desired and that they would be positioned as desired. These tacking elements are formed of suitable material adapted to receive tacks temporarily held therein to maintainthe-shoe upper and sole in place during certain steps in the fabrication of theshoe. A suitable composition of rubber material may be employed. Leather may be employed. Such material is penetrable by the tacks and tends to seal itself upon withdrawal of the tacks. Such material'is likewise compressible and resilient for insertion within the provided recess.

The bottom face I 2 of the last body has a tacking strip receiving recess 14 formed therein. This recess is substantially rectangular in cross section. A side wall of this recess carries a rib or lug it which projects into the recess. In the figures of the drawing the opposite side walls of the marginal recess M are shown as provided with such ribs. The side wall of the interiorly disposed circular recess has a ribwhich extends -circumferentially therearoundas. shown: in Fig. 3 hold ing elementyi8 thereon. l These lugs or ribs are formed so as to have an upper face 20 that slopes from the interior edge outwardly and upwardly toward the side wall. Thelower faceextends substantially normal to the side wall. The rib forms an acute-angled projection which permits insertion of the tacking strip inwardly into the interior of the'recess to seat therein but prevents withdrawal of the tacking strip from such seated position.

The tacking strip itself is indicated as 22. As stated it is formed of compressible resilient normally penetrable material. It has a width substantially equal to the normal rectangular width of the recess. It is inserted as shown in Fig. 3

by being forced inwardly. It is compressed as it rides over the sloping upper faces of the ribs It so as to move to a seated position within the recess. When seated the ribs embed themselves within the compressible strip and the horizontal lower faces prevent withdrawal of the strip and securely hold it in place.

It is understood that in the manufacture of shoes the tacks which enter these strips may be of such length that they extend to the bottom of the recess. Certain of them might turn over at the ends. Withdrawal of these tacks exerts considerable pressure tending to withdraw the tacking element from the recess within which it is seated. A locking rib formed as shown herein so engages the tacking element that such accidental withdrawal is prevented and the tacking element retains its position in the recess without the employment of adhesive or other retainmg means.

It will be noted that the side walls of the recess as shown are parallel and that the tacking strip has a width substantially equal to the. distance between the straight side walls of the recess. The same is true of the tacking elements l8.

What I claim:

1. A shoe last having a bottom face provided with a recess, a tacking element seated therein, said recess having a side wall provided with a lug projecting interiorly of the recess and embedded in the tacking element, said lug having a shoulder engaging the tacking strip below the outer edge of the side wall provided with the lug.

2. A shoe last having a bottom face provided with a recess, a tacking element seated therein, said recess having a side wall provided with an acute-angled lug projecting interiorly of the recess spaced above the bottom of the recess and below the outer edge of the side wall provided with the lug and embedded in the tacking element.

3. A shoe last having a bottom face provided with a tacking element receiving recess having a width across the bottom of the last substantially equal to the width across the bottom of the recess, a tacking element seated therein, said recess having a side wall provided with a linearly extending acute-angled rib projecting into the recess and embedded in the element.

4. A shoe last having a bottom face provided with a tacking element receiving recess, a tacking element seated therein, said recess having a side wall provided with a linearly extending acuteangled rib projecting into the recess and embedded in the element, said rib having a lower face which forms with the side wall of the recess an angle not greater than a right angle.

5. A shoe last having a bottom face provided with a tacking strip receiving recess substantially rectangular in cross-section, a tacking strip seated therein, each side wall of said recess provided with a linearly extending rib projecting into the recess and embedded in the tacking strip, said rib having a lower face which is substantially normal to the side wall of the recess and an upper face which slopes outwardly toward said Wall and upwardly toward the entrance to the recess.

6. A shoe last comprising a body portion having a normally impenetrable bottom face provided with a tacking element receiving recess having a width across the bottom of the last substantially equal to the width across the bottom of the recess, a normally penetrable tacking element normally rectangular in cross section seatedwithin said recess, said recess having a side wall provided with a part formed integrally therewith embedded in said tacking element retaining the same within the recess.

'7. A shoe last comprising a body having a nor mally impenetrable bottom face provided with a tacking. element receiving recess having normally parallel side walls, a normally penetrable compressible resilient tacking element seated within said recess, one side wall of said recess having an angular part projecting into the recess and embedded in the tacking element.

8. A shoe last having a bottom face provided with a tacking strip receiving recess substantially rectangular in cross-section, a compressible resilient tacking strip substantially rectangular in cross-section seated in said recess, each side wall of the recess provided with a linearly extending rib projecting into the recess and embedded in the tackingstrip, said rib having a lower face which is substantially normal to the side wall and an upper face which slopes outwardly toward said wall and upwardly toward the entrance to the recess, said strip having a normal uniform width substantially equal to that of the recess above the rib.

9. A shoe last having a bottom face provided with a tacking element receiving recess, a tacking element seated therein, opposite side walls of said recess provided with opposed angular lugs embedded in opposite sides of the tacking element below the outer face thereof retaining the tacking element within the recess. 7 V

GEORGE C. CLARK.