US2000963A

US2000963A - Outsole removing machine

Info

Publication number: US2000963A
Application number: US645716A
Authority: US
Inventors: Axel A Lawson
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1932-12-05
Filing date: 1932-12-05
Publication date: 1935-05-14
Anticipated expiration: 1952-05-14

Description

May 14, 1935. A. A. L AwsoN 2,000,963

OUTSOLE REMOVING MACHINE Filed De@ 5, 1952 Q W01) e. l www Patented May 14, 1935 oU'rsoLE nEMovING MACHINE v Axel AQ Lawson, Beverly, Mass., assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporationof New Jersey f Application December 5, 1932, serial No. 645,716

22 Claims.

This invention relates to machines for repairing shoes and is herein illustrated `as embodied in a machine for removing wornsoles from shoes.

The removal o'f a worn sole from a shoe which is to be resoled requires thebreaking ofthe attachment between the sole and the `upper' which, along the margin of the forepart and'shank, commonly consists of stitching or an adhesive such, for example, as a pyroxylin cement.

Heretofore the sole removing operation has ordinarily been performed either by passing a hand knife about the shoe, its point having been inserted betweenY the sole and the adjacent portion of the shoe bottom, or by bodily tearing the sole and the upper away from each other. However, in practising either of the above methods upon a shoe the sole of which is secured to the upper by means of one of the relatively hard adhesives rused for sole attaching, the upper of the shoe is endangered, since, owing to the relative weakness of the upper material as compared with the sole material and the hardness and toughness of the adhesive itself, there is danger that the cleavage Will occur in the upper material. Forexarnpla a knife as employedin the first method mentioned above will tend to veer away from the sole material which has absorbed the adhesive as Well as from the thin layer of adhesive between the sole and the upper, cutting and injuring the upper leather; and when the upper and sole are torn from each other it is probable that parts of the shoe upper will stick to the sole and hence be removedfrom the shoe with the sole. Ihus the shoe upper is sometimes so weakened as to make the attachment of a new sole impractical.

Theabove difficulties have been overcome by the present invention, an important object `of which is to provide an improved machine for separating the sole from the upper of ashoe as the marginal portion of the shoe bottom is presented progressively thereto, characterized by a severing action which is excluded from the upper.

In accordance with this object, one feature of the invention consists, in combination with'guiding means adapted to be inserted between a sole and the adjacent portion of the bottom of a shoe, ofA means for separating the sole fromthe upper having a cuttingedge which lies substantially in a surface arranged to'engage the side of the sole adjacent to thej shoe bottom and extending in the direction L of y the feed movement.- The cutting edge of this separating means is preferably at the intersection of its sole engaging side and another surface adjacent tothe shoe bottom and extending at an angle to the direction of feed, the latter (c1. lz-i) surface constituting a beveled surface which tends to direct the cutting action of the separating means toward the sole rather than toward the upper.

i The separating means is illustrated herein as a knife which has an oscillating cutting movement substantially normal to the sole edge surface. Since only the marginalportion of a shoe bottom need be operated upon to effect the separation of the sole from the upper in the above described manner, the knife is required to operate only on that portion of the shoe. Therefore, another feature of the invention is constituted by means for limiting the eld of action of the knife in wardly of the shoe from its sole edge whereby the `penetration of the knife between the sole and the upper extends-no farther than is necessary to, operate completely upon the attachment theren between. To this end the above-mentioned guiding means, herein illustrated as a plate, carries an abutment adapted to engage the edge of the sole of .a shoe presented to the machine and thus to prevent the plate and knife Lfrom being inserted to an excessive depth between the sole and attaching portion of the shoe. f

The progressive presentation of the marginal portionof the shoe bottom to the above-described instrumentalities is facilitated in the illustrated machine by means cooperating with the guiding plate to impart a feed movement to the shoe by engagement with the sole. This means, as herein illustrated, is constitutedby a feed wheel having asubstantially frusto-conical surface and which is mounted so as yieldingly to engage the tread surfacev of the sole and to urge the opposite or attaching surface of the sole against the surface of the guiding plate'which includes the cutting edge of the knife, thus promoting the desired action `of the knife as described above.

Y While the machine in which the invention is embodied is illustrated herein as operating upon a shoe the sole of which is attached to the upper by means of an adhesive, it is apparent that the machine is also well adapted for operating upon shoes the soles of which are attached by means of stitching.

These and other featuresof the invention will now be `described with reference to the accompanying drawing and will be pointed out in the appended claims.

In the drawing,

' Fig. l is a side elevation of an illustrative machine embodying lthe present invention and includes a sectional view of a shoe being operated upon by the machine;

Fig. 2 is a front elevation of the machine, some parts of the frame being shown in section and others being broken away; and

Fig. 3 is a sectional plan View along the line III-III of Fig. l.

The illustrated machine comprises a pedestal II! from the upper part of which extends a forwardly extending arm I2, uprights I4 connected at their upper ends by a web I6, and also rearwardly extending arms I8. A guiding plate 20 is secured by means of screws 22 to the forward end of the arm I2 and is disposed substantially in a vertical position. The operative end of the guiding plate 26 tapers both widthwise and heightwise to a point at its lower extremity and is thus adapted to be inserted between the sole and adjacent attaching portion of a shoe to be operated upon as a result of the shoe being raised upwardly by the operator against the guiding plate. Since soles are usually attached to shoes only at their marginal portions, it is necessary to separate merely the marginal portions of the sole and the shoe in order completely to remove the sole. The guiding plate 2B, therefore, carries an abutment 24 which is arranged to engage the edge surface of a sole and thus to limit the depth to which the guiding plate can be inserted between the sole and the shoe bottom.

A knife 26 (Fig. 2) is mounted to move with respect to the guiding means 20 in a direction substantially normal to the sole edge and is carried by a rock arm 26 which is arranged to swing on a rod 36 carried by the two rearwardly extending arms I8. As illustrated in Fig. 3, the knife 26 is relatively thin and is received within a notch in the guiding plate 20, the sides of the guiding plate and knife 26 adjacent to the sole being bounded substantially by a common surface. It is apparent also that the cutting edge of the knife 26 is included in its sole engaging surface and is formed by a bevel which extends toward the shoe upper. The cutting edge of the knife 26 is oblique with respect to the direction of its cutting movement and tapers toward a point which is adjacent to the point of the guiding plate 20. Thus, the movement imparted to the knife results in a. cutting action which is a combination of shearing or slicing and of chopping. The relation of the beveled surface of the illustrated knife with respect to the sole engaging surface causes the knife edge to tend to run into the sole rather than into the adjacent attaching portion of the shoe upper, if it veers at all from the line of attachment therebetween, and thus insures against the upper being defaced or injured during the sole removing operation. The mechanism for imparting the above-mentioned cutting movement to the knife 26 includes a link 32 which is pivotally connected by means of a rod 34 to the rock arm 28 and which is driven by a crank 36. The crank is carried by a shaft 38 which is journaled in one of the uprights I4 and is operated by a drive shaft 4I), journaled in both of the uprights I4, by means of meshing

spur gears

42 and 44 pinned on the

shafts

38 and 40 respectively. The shaft 4I) in the illustrated machine is rotated by means of a crank 46, but it is apparent that, if desired, a belted pulley could be substituted for the crank if it should be desired to use such a source of power.

A feed wheel 48 is arranged to engage the marginal portion of the tread surface of the sole and to hold the opposite attaching surface of the sole against the guiding plate 20. To this end, a shaft 56, on the end of which the feed wheel 46 is mounted, is rotatably mounted in a carrier 52 which is arranged to swing freely on the shaft 40 and to be yieldingly urged in a counterclockwise direction (Fig. 1) by means of a spring 54 connected at one end to the support 52 and at the other to a pin 56 inserted in the bearing for the shaft 38 in one of the uprights I4. As plainly indicated in the drawing, the feed wheel 4B is provided with a series of teeth the edges of which are interrupted longitudinally and which are elements of a frusto-conical surface. The feed wheel 48 is rotated by means of a worm gear 58 which is fixed to the shaft 50 and which meshes with a worm 6D pinned to the drive shaft 46. Therefore, as the drive shaft 40 is rotated, the feed wheel 46 and the knife 26 are operated in synchronism, the feed wheel being rotated and the knife being oscillated back and forth in a direction substantially parallel to the proximal'portion of the feed wheel. It is desirable to hold the feed wheel 48 some distance away from the guiding plate 2D at the beginning of the sole removing operation to facilitate the insertion of the guiding plate 20 between the sole and the attaching portion of the shoe. This is accomplished in the illustrated machine by means of a latch 62 which is pivoted on a screw 64 to a control lever 66 which is integral with the support 52. When the lever 66 is moved in a clockwise direction (Fig. l) in opposition to the spring 54, the feed wheel 48 is moved away from the guiding plate 20, and under the influence of a spring 68 the latch 62 is swung underneath the web I6, thereby preventing temporarily the return of the lever 66 to its original position when released by the operator.

The operation of the machine may be summarized as follows: Assuming the feed wheel 48 to be in the position last referred to, the operator presents a shoe, the sole of which is to be removed, to the guiding plate 20 so that its point is at the line of attachment between the sole and the adjacent portion of the upper. He then lifts the shoe upwardly against the guiding plate 26, causing the plate to be forcibly inserted between the sole and the adjacent attaching portion of the upper until the edge surface of the sole comes into contact with the abutment 24. The latch 62 is then operated to release the lever 66, allowing the feed wheel 48 to move into contact with the tread surface of the sole, and to hold the marginal portion of the sole against the guiding plate 20. The operator then turns the hand crank 46 which results in the feed wheel 48 being rotated and the knife 26 being moved back and forth in a direction substantially normal to the sole edge. The feed Wheel thus cooperates with the guiding plate to impart a feed movement to the work by engagement with the sole and also to tension, to some extent, the portion of the sole between the bite of the feed wheel and the cutting edge of the knife. rIhis tends to cause the side of the knife adjacent to the sole to seat itself evenly against the sole and thus promotes the cutting by the knife at or adjacent to the attachment between the sole and the contiguous portion of the shoe. However, on accont of the beveled surface of the knife being disposed as above described, the tendency of the knife to veer away from the attachment between the sole and the adjacent portion of the upper will prevent the knife from cutting into the adjacent upper material if, in fact, the cutting edge is not maintained strictly as desired. After a sole has thus been removed from the shoe, such portions of the ginal portionof the shoe bottom is progressively presented thereto, said last-mentioned means having surfaces which converge to form a cuttingedgathat surface adjacent to the shoe bottom extending at an angle to` the direction of i the feed vmovement of the shoe.

2. In'` a machine for operating upon shoes, guiding means adapted to be inserted between a sole and a shoe bottom, and means for separating the' sole from the shoe bottom as the marginal portions thereof are progressively presented to said means, said means having a cutting edge in a surface arranged to engage the side of the sole adjacent to the shoe bottomV and ,extending in the direction of the feed movement of the shoe. V 3. In a machine for operating upon shoes, guidingY means adapted to be inserted between the sole and the upper of a shoe, andmeans for separating the sole from the upper, the sole engaging portions of said separating means and guiding means lying substantially in a'common surface, said separating Ameans also having a beveled surface extending toward the upper of the shoe to form a cutting edge substantially included by said common surface. i

4. In a machine for operating upon shoes, guidingA means adapted to be inserted between andv to engage opposite portions of the sole and the shoe bottom, and a knife for separating the sole from the upper as the marginal portion of the shoe bottom is progressively presented to the knife a surface of the knife including its cutting edge being continuous with the sole engaging surface of the guiding means, both of said surfaces being arranged toV engage the side of the sole adjacent to the shoe bottom.

5. In a machine for operating upon shoes, means for guiding `a shoe adapted to be inserted between the sole and the adjacent portion of the shoe upper, a knife for separating the sole from the shoe as the marginal portion of the shoe bottom is progressively presented to the knife, the

sole engaging surface of said guiding means being interrupted to receive the knife whereby the` sole engaging surfaces of the knife and guiding means are substantially included in a common surface, the upper engaging portions of the knife being beveled to form a cutting edge lying substantially in said common surface.

6. In a machine for operating upon shoes, a plate shaped and arranged to extend between the marginal portions of the sole and the adjacent portion of a shoe upper, and means associated with said plate and arranged for movement substantially normal to the sole for separating the sole from the shoe as the margin of the shoe bottom is progressively presented to the separating means, said plate having a pointed extremity extending beyond the eld of action of the separating means.

7. In a machine for operating upon shoes, guiding means shaped and arranged to penetrate between the sole and the adjacent portion of a shoe upper held thereagainst, and means for severing the attachment between the sole and the adjacent portion ofthe shoe bottom having a movement substantially normal to the sole edge, said guiding meanshaving a shoe engaging abutment constructed and arranged to limit the eld-of action of the severing means inwardly of the shoe from its sole edge.l i

8. In a` machine for operating upon shoes, means for guiding a shoe shaped and arranged to penetrate between the sole and the adjacent por,- tion of a shoe bottom held the-reagainst, and means for progressively separating the sole from the shoe bottom as successive portionsV o-f the margin of the shoe bottom are presented to the separating means, said-guiding means having a sole edge engaging surface arranged to` limit the field of action of the separating meansrelatively to the shoe.

9. In a machine for operating upon shoes, a guiding plate shaped and arranged to penetrate between a sole and the adjacent portion of a shoe bottom held thereagainst, and means associated with said guiding means for progressively separating the margin of the sole from the adjacent portion of the shoe Vbottom as successive portions of the latter are presented to the separating means, the guiding plate having an abutment arranged to engage the sole edge thereby to limit the field of action ofthe separating means. i

l0. In a machine for operating upon shoes, a plate shaped and arranged to penetrate between a sole and the adjacent marginal portionof a shoe upper held thereagainst, and means asso'- ciated with the plate for separating the-sole and the upper having a movement in a direction substantially normal to the sole edge, said plate having a sole edge engaging portion for limiting its penetration to the marginal portion of `fthe shoe bottom including the attachment between the so-le and the upper. l

ll. In a machine for operatingupon shoes,` a guiding plate having opposed surfaces arranged to engage the marginal portion of a` sole and the adjacent portion of a shoe bottom respectively, the former surface having a recessed portion, saidV surfaces converging toward an end of said plate in order to facilitate the penetration of said end between the sole and theshoe bottom held thereagainst, and means received in the recessed portion of said guiding platefor progressively separating the sole from the shoe as successive portions of the shoe are presented thereto.

12. In a machine for operating upon shoes, a guiding plate the opposed work engaging surfaces of which are arranged to engage the marginal portion of a sole and the adjacent portion of the shoe upper respectively, the said surfaces and the sides of the guiding plate converging toward one end, and a knife for progressively separating the sole and the upper of the shoe as successive portions thereof are presented to the knife, the sole engaging side of the plate being recessed to receive the knife whereby the sole engaging side of the knife and the plate are included in a common surface.

13. In a machine for operating upon shoes, a guiding plate shaped and arranged to penetrate between the sole and the adjacent portion of the upper of a shoe held thereagainst, and a knife for separating the sole and the upper, the sole engaging surfaces of the plate and knife being included in a common surface and a portion of the plate being arranged to overlap the upper engaging side of the knife.

14. In a machine for operating upon shoes,

guiding means shaped and arranged to penetrate between the sole and the adjacent portion of the upper of a shoe held thereagainst, means for severing the marginal portion of the sole from the adjacent portion of the shoe bottom, and means cooperating with said guiding means yieldingly to grip the sole and impart a feed movement to the shoe.

15. In a machine for operating upon shoes, a fixed guide shaped and arranged to penetrate between the marginal portion of the sole and the adjacent portion of the upper of a shoe held thereagainst, means for severing the sole from the adjacent portion of the upper, and means mounted yieldingly to hold the attaching surface of the sole against the guide land to impart a feed movement to the shoe,

16. In a machine for operating upon shoes, guiding means adapted to be inserted between the sole and the adjacent portion of the upper of a shoe, means for severing the sole from the shoe, feeding, means mounted to swing toward and away from said guiding means, and yielding means for causing said feeding means to urge the marginal portion of the sole against vsaid guiding means.

17. In a machine for operating upon shoes, guiding mea-ns adapted to be inserted between a sole and the adjacent marginal portion of a shoe upper, means cooperating with said guiding means and arranged to engage the marginal portion of the tread surface of the sole to impart a feed movement to the shoe, and means for separating the sole from the upper having a cutting edge lying in a surface extending in the direction of feed movement and including the sole engaging surface of the guiding means.

18. In a machine for operating upon shoes, guiding means adapted to be inserted between a sole and the adjacent portion of a shoe bottom, means cooperating with said guiding means for imparting a feed movement to the shoe, and means for progressively severing the sole from the shoe having a cutting edge included in a surface arranged to engage the sole and to extend in the direction of feed,

19. In a machine for operating upon shoes, a guiding plate having a pointed extremity arranged to penetrate between the marginal portions of the sole and the adjacent portion of the bottom of a Vshoe held thereagainst, a feed wheel cooperating with said guiding plate to. impart a feed movement to the shoe, and a knife for severing the sole from the shoe, the cutting edge of the knife lying in a surfaceextending in the direction of feed and including the sole engaging side of the knife.

20. In a machine for operating upon shoes, a guidingl plate shaped and arranged to penetrate between the marginal portion of a sole and the adjacent portion of the bottom of a shoe held thereagainst, a rotating feed wheel arranged to cooperate with said guiding plate to impart a feed movement to the shoe, and a knife mounted for movement substantially perpendicular to the direction of feed for progressively separating the sole from the bottom of the shoe, the side of the knife which engages the shoe bottom being beveled to form a cutting edge which is included in a surface extending in the direction of feed.

2l. In a machine for operating upon shoes, guiding means shaped and arranged to penetrate between the sole and the bottom of a shoe held thereagainst, means for separating the marginal portion 4of the sole from the adjacent portion of the shoe bottom, said guiding means having a sole edge engaging abutment arranged to limit the action of the separating means to the marginal portion of the sole and shoe bottom, and means arranged to engage the tread surface of the sole and to cooperate with said guiding means to impart a feed movement to the shoe.

22. In a machine for operating upon shoes, a guide plate having a pointed end adapted to penetrate between the marginal portion of a sole and 1';

the adjacent portion of the bottom of a shoe held thereagainst, means associated with said plate for severing the sole from the adjacent portion of the shoe bottom, said guiding plate having a shoulder arranged to limit the penetration of said plate and severing means between the sole and the shoe bottom, a feed wheel the work engaging portion of which is included in a frusto-conical surface and is arranged to cooperate with said plate to impart a feed movement to the shoe, and means for operating said severing means and the feed wheel in synchronism.

AXEL A. LAWSON.