US1368320A - Sole-leveling machine - Google Patents

Description

W. C. BAXTER.

SOLE LEVELING MACHINE.

APPLICATION H11-:n FEB. 2|, i916.

Patented Feb. 15,11121.l

2 SHEETS-SHEET I.

v Arll/ r l I I SOLE LEVELING MACHINE,

APPLlcATmN FILED FEE. 2l, 1915.

Mw.. Bamm Feb. 15,1921.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

WILLIAM C. BAXTER, F IBEIIV'ELRLY,y MASSACI-IUSETTS, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, 01T' PATERSON, NEW IER- SEY, A CORPORATION OF NEW JERSEY.

SOLE-LEVELING- MACHINE.

Application filed February 21, 1916. Serial No. 79,637.'

T 0 all 'whom it may concern Be it known that I, WILLIAM C. BAXTER, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Sole-Leveling Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will. enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to sole leveling machines of that class which comprise a shoe supporting jack and a sole leveling roll which are relatively moved during the leveling operation to transfer the point of operation of the roll over the sole.

In operating on certain kinds of shoe stock with machines of this class it is desirable, if not absolutely necessary, to subject the sole to heat as well as to pressureA during the leveling operation. Also superior results can be secured by varying the degree of heat to suit the condition or character of any particular kind of stock..

The object of the present invention is to provide improved means for heating the leveling roll of a sole leveling machine whereby the heat which is applied to the sole may be accurately controlled and whereby the degree of heat may be varied as may be necessary or desirable.

With this object in view the invention contemplates the provision of an electric heating device for the roll and a rheostat or other suitable means for ,varying the degree of heat.

Other features of the invention consist in certain devices and combinations of parts hereinafter described and claimed, the advantages of which will be obvious to those skilled in the art from an inspection of the accompanying drawings and the detailed description of the machine illustrated therein.

The several features of the invention are illustrated in the accompanying drawings in which Figure 1 is a view in side elevation of an automatic sole leveling machine embodying the invention in its preferred form; Fig. 2 is a plan of the leveling roll showing its electrical heating connections; Fig. 3 is a side elevation partly in section, of the roll shown in Fig 2; and Fig. 4 is an end elevation of the roll shown vin Fig. 2.

The leveling machine shown in the drawings is substantially the same in its construction and operation of parts as the machine shown in my co-pending application Vfor a leveling` machine, Serial No. 750,326,

filed February 24, 1913, to which reference is hereby made. This machine is provided with a pair of jacks 10 on which are mounted the shoe supporting forms and a pair of leveling rolls 12 mounted in carriers 14 and connected with yokes 16 .by which a vibratory movement is given to the rolls. In leveling a sole, the shoe on a form, generally a last, is placed on a jack, and the jack is oscillated to carry the sole back and forth under a roll 12. As the shoe is carried back and forth under the roll, the roll carrier is tipped to set the roll at diiferent inclinations in order to bring the point of application of the roll into proper position for leveling the sole.

To heat the roll during its leveling operation. a pair of heat conducting blocks, heated by electrically generated energy, are held in sliding contact with the roll. The roll 12, Figs. 2, 3 and 4, is loosely mounted in the Ordinary manner upon a shaft 18. The ends of the shaft pass through the arms of the vibrating yoke 16 and are Lined in the usual sliding blocks 20. The heat conducting blocks 22 are mounted between the arms of the yoke 16 and the ends of the roll 12. To make a heat contact with the heat conducting blocks 22. each roll is provided with a pair of cylindrical bores 24 which project far enough into the body of the roll so that the heat from the blocks 22 will be uniformly distributed over the outer surface of the roll. A chamber 28 is formed in the upper portion of each block in which is placed an electrical resistance heating unit 30, and the unit is held in place by means of a clip 32 which projects down across each end of the unit. (See Figs. 3 and 4). A connecting bracket 34 projects out from each side of the heating block 22 and the blocks at the opposite ends of the roll are connected together by means of tie rods 36 which are secured in opposing brackets 34. To prevent the heating blocks from rotating with the rolls, a tie bracel 38 is attached at one end to the inner tie rod 36 and at the other end to the yoke 16.

The electrical circuit for conducting electrical energy to the heating units 30 in the leveling roll consists of main conductors 40,- (Fig. 1) switch 42, rheostat 44, cable 46, and connecting rleads 48. rlhe main conductors 40, switch 42, and rheostat 44, are

mounted upon an insulating panel whichkv is attached to the upper part of the machine frame. The cable 46 is connected at one end -to the panel 50 and at the other end to a 58 are mounted uponthe tie brace 38' and e the bracket 52 respectively for supporting the leads 48. These plates holdthe leads so that their connections with the units may be made Without interfering With the operation of the roll, and to prevent the vibratory movement of the yoke 16 relatively to the carrier 14 from breaking their connections with the heating units. With the above described connections, the electric current passes through the conductors 40, to the switch 42, then through the rheostat 44, to the cable 46 and leads 48 into the heating units 30. An indicator 60 is placed on the panel 50 to show when the current is being used. i f Y.

The operation of the machine is as follows: The main conductorsv 40 being in a power circuit, the stv-itch 42 is closed and the rheostat set to give a full flow of current so that the rollstvill be quickly brought to heat. After the rolls have come toa heat, the rheostat isset to control the cur'- rent flowing to the heating units so ,that the desired temperature ymay be maintained in the rolls. A shoe is then placed on a jack 10 and leveled in theusual manner'. Then treating different classesl of shoe sole stock, the heat Should be varied in order to give satisfactory results. In ordinary sole leather, which is held intemper While being leveled, the heat is increased proportionately to the thickness of 'thelsole' and 'is held at such a temperature that steam will be generated from moisture in the sole and the heatpenetrate far'enoughnto thebody of the sole to alfectthe 'fibers ofthe sole so Vthat it can be permanently moldedV into rollsin treating all the ldiiierent grades'of stock Without' materially interfering` with Vrately controlling :the temperature of the the continuous operation of the machine.'-

It has been found that the pressure does'not have to be so'great' When employing heat in order tov give the desired shape to the sole, and that the sole does not need to remain under pressure for a long period of time in order to retain its molded shape.

The nature and scope of the present invention having been indicated and a machine embodying'V the invention in its preferred form having been specifically described, Whatis claimedas'nevv is A sole-leveling machine comprising a shoe-supporting jack, a roll-carrier, a rollsh'aft, slidessupporting'opposite ends of the shaft, a vibratory yoke connetced to the shaft, a leveling-roll loosely journaled upon the'shaft andhavingV chambers formed in the oppositeends, aheating-block received in each chamber and'having a recessed portion extending above the yoke, means for connecting both blocks with the yoke to hold the blocks against rotation, an electrical heating unit fitting Within the recess in each block, a clip mounted upon; the block and engaging `the unit for detachably holding the latter 4in place, and connections between both unitsV and an electricV circuit.

WILIAM C. BAXTER;

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