US2509392A - Apparatus for use in applying pressure to shoe bottoms - Google Patents

Description

May 30, 1950 2,509,392

F. V. HART APPARATUS FOR USE IN APPLYING PRESSURE TO SHOE BOTTOMS Filed Oct. 8, 1948 5 Shee ts-Sheet l May 30, 1950 F. v. HART APPARATUS FOR USE IN APPLYING PRESSURE TO SHOE BOTTOMS Filed Oct. 8, 1948 5 Sheets-Sheet 2 3 Inventor Fred if Ha 7*2 May 30, 1950 F. v. HART 2,509,392

APPARATUS FOR USE IN APPLYING PRESSURE TO SHOE BOTTOMS Filed Oct. 8, 1948 s Sheets-Sheet 5 May 30, 1950 F. v. HART APPARATUS FOR USE IN APPLYINL PRESSURE T0 SHOE BOTTOMS 5 Sheets-Sheet 4 Filed Oct. 8, 1948 32 Inventor Eed V Hart ay 30, 1950 F. v. HART 2,509,392

APPARATUS FOR USE IN APPLYING PRESSURE TO SHOE BOTTOMS Filed Oct. a, 1948 s Sheets-Sheet 5 32 5 Fred V 1 1 am Patented May 30, 1950 APPARATUS FER USE IN APPLYING PRES- SURE TO SHOE BOTTGMS Fred V. Hart, Lynn, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. 3., a corporation of New Jersey Application October 8, 1948, Serial No. 53AM;

Claims.

This invention relates to apparatus for applying pressure to shoe bottoms, and more particularly to pad boxes for supporting a shoe in the pressure-applying operation. The apparatus finds utility in such operations as sole-laying, sole-leveling and cement-sole-attaching. The invention is illustrated as embodied in a pad box of the type shown and described in Letters Patent of the United States No. 2,289,360, granted July 14, 1942, on an application filed in my name, although it will be understood that in its broader aspects the invention is not thus limited in its application.

It is an object of the invention to provide an improved pad box of the type in which a shoe bottom-engaging pad is carried by separate members one of which supports the forepart portion of the pad and another of which supports the shank and heel portions of the pad and in which the members are individually adjustable in response to pressure applied by the shoe to accommodate the pad to the contour of the shoe bottom, thereby to impart substantially uniform pressure throughout the area of the shoe bottom.

The pad box shown in the aforementioned patent includes a shoe-engaging pad, separate supporting members being provided for the forepart of the pad and for the shank and heel portions of the pad. Each of these members is arranged to rock lengthwise and widthwise of a shoe sup ported thereon so that the pad may conform generally to the contour of the bottom of the shoe to be operated upon. The adjacent edges of the pad-supporting members are normal to the sides of the members and consequently are not arranged to coincide with the ball line or break line of a shoe centrally placed on the pad. In other words, with a shoe so placed on the pad the ball line will be oblique to the longitudinal center line of the pad whereas the break between the two pad-supporting members is normal to the longitudinal center line of the pad. This fact is not of any particular consequence when a mans shoe or a womans low heel shoe is being operated upon but does become of importance when operating upon a womans high heel shoe. In such a case the forepart-supporting member must be tipped at quite an angle to the shank and heelsupporting member in order that all portions of the shoe bottom will be subjected to generally the same pressure during the pressure-applying operation, the angle at which the'iforepart member is tipped increasing with the heel height of the shoe. In order to apply uniform pressure throughout the forepartit will be understood that all portions of the forepart forwardly of the break line should engage that portion of the pad resting on the forepart-supporting member. With the shoe thus placed on the pad, having in mind that the ball line extends at an oblique angle to the center line of the pad box, it will be apparent that the forepart-supporting member will also underlie a part of the shank portion of the shoe, particularly along the inner margin. Consequently, this part of the shank portion will bridge the angle between the forepart and shanksupporting members. The pressure applied to this portion will not be as great as the pressure applied throughout the other portions of the shoe bottom, this condition being aggravated in direct proportion to the heel height of the shoe.

This difiiculty has been overcome in accordance with a feature of the invention by forming the adjacent edges of the pad-supporting members oblique to the longitudinal center lines thereof so that the break or joint between the members will coincide generally with the ball line of a shoe to be placed on the pad, whereupon the forepart-supporting member will pivot about an axis which is parallel or nearly so with the ball line of the shoe. By so forming the padsupporting members the entire area of the forepart will rest on that portion of the pad carried by the forepart-supporting member and the entire area of the shank will rest on that portion of the pad carried by the shank-supporting memher, so that regardless of the inclination of the forepart-supporting member with the shanksupporting member, all portions of the shoe bottom may receive adequate support and the pressure distribution throughout the shoe bottom will be more uniform than has heretofore been possible with pads of this general construction. This arrangement of the pad-supporting members obviates the necessity for providing for tipping movements thereof laterally of the shoe or about axes running lengthwise of the pad because the forepart-supporting member in swinging about the oblique axis will maintain substantially its proper angular relation laterally of the shoe. If desired, however, at least one of the supporting members for the pad may also be mounted for tipping movements laterally of the shoe bottom as in the aforementioned patent thus making it possible to control the relative pressure distribution on the inside and outside marginal portions of the shoe in the manner described in the aforementioned patent.

It will be understood that the angular relation between the ball lines of diiierent shoes and a center line drawn through the shank and heel portions will vary in shoes of different styles and hence it is impossible to form the joint between the supporting members so that it will exactly coincide with shoes of all styles. However, the break between the supporting members may be made to approximate at least the location of the ball line of any shoe to be operated upon, thus making it possible to obtain a more uniform pressure distribution when operating upon high heel shoes than has been heretofore possible with pads of this type.

In order properly to support the forepart-sup porting member during its adjustment in response to the application of pressure thereto through the shoe, transversely extending rolls engage the central portion of the forepart-supporting member, these rolls being manually adjustable lengthwise of the pad and. being adjustable about a vertical axis so that they may shift about said "axis as they are adjusted lengthwise properly to support the forepart supporting member widthwise of the pad as the supporting member moves about its oblique axis.

The above and other features of the invention, including various details of construction and novel combinations of parts will now be described by reference to the drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a view in side elevation, partly in section, of one form of pad box embodying the invention;

Fig. 2 is a plan View of the pad box;

Fig. 3 is a section on the line IIIIII of Fig. 2;

Fig. 4 is a section substantially on the line IVIV of Fig. 2;

Fig. 5 is a section substantially on the line V--V of Fig. 2;

Fig. 6 is a section on the line VIVI of Fig. 2;

Fig. 7 is a view similar to Fig. 4 illustrating a modification of the invention, and

Fig. 8 is a section on the line VIII-VIII of Fig. 7.

The invention is illustrated herein as embodied in a pad box for use in sole-laying machine of the type illustrated in Letters Patent of the United States 1,549,243, granted August 11, 1925, on an application filed in the name of E. E. Winkley. It will be understood, however, that the invention is not thus limited in its application but that the pad box illustrated herein may also be used for operations such as sole-leveling or cement sole-attaching.

The pad box comprises a main frame or carrier l0 (Figs. 1 and 2) having laterally extending trunnions I2 by which it is pivoted for swinging movement in a sliding frame id of the sole-laying machine. This frame is mounted on vertical rods 16 for movement toward and away from a jack secured to the upper ends of the rods and provided with shoe supports comprising a last-engaging member [8 and a toe-engaging roll 20. The swinging carrier Ill has formed therein a longitudinal guideway 22 (Figs. 1, 4 and 6) in which are mounted for sliding movement lengthwise of the carrier, blocks 24, 26. swivelly sup ported by the block 2Q is a carrier 28 in the upper portion of which are journaled rolls 352. The block 26 has journaled in its upper portion a pair of rolls 32 the rolls 32 providing supports for a pair of pad-supporting members 3%, 36, the pad-supporting member 34 being arranged to underlie that portion of the pad by which the forepart of the shoe is supported, the shank and heel portions of the pad being supported by the member 36.

The pad-supporting member 34 comprises a supporting plate 38 having vertical side walls 45 between which is received a block 42 the upper surface of which is shaped to conform generally to the forepart of a shoe bottom. The supporting member 35 comprises a plate 44 having vertical side walls 46 between which is supported a block 48 the upper surface of which is shaped to conform generally to the contour of a shoe bottom rearwardly of the ball line. The plates 38, M are supported on the rolls 3!), 32 respectively for rocking movements about the rolls and, as shown in Fig. 2, the adjacent edges of the padsupporting members are parallel but are inclined to the longitudinal axes of the supporting members so that the break or joint between the members coincides generally with the ball line of a shoe placed on the pad box.

Extending laterally from the side walls 46 of the forepart-supporting member 34 are lugs 56 which are in the form of sectors of somewhat less than a semicircle, the side walls it of the supporting member 36 being provided with similarly-shaped lugs 52. The lugs are so arranged that their centers of revolution are in alinement with the adjacent ends of the supporting members. These lugs extend into vertical guideways 5% (Fig. 3) formed in the opposite side walls of the carrier 58 and the guideways are closed at the top by plates 56 secured in position by screws. The lugs 50, 52 are normally held with their centers of revolution in interengaging relation as shown in Fig. 3 for conjoint vertical movement in the guideways 54 in a plane oblique to the longitudinal central axis of the pad. For this purpose the adjacent faces of the lugs are cut away at 58 to receive pins 6!! carrying heads 62 which engage the upper portions of the lugs. The pins extend downwardly below the lugs, and washers 64 are held in engagement with the lower surfaces of the lugs by springs 66 confined between the washers 64 and washers 68 held in place by nuts 10 threaded onto the lower ends of the pins. From the above, it will be seen that the pad-supporting members are pivoted together about an axis which forms an'angle with the longitudinal axis of the pad box and extends generally along the ball line of a, shoe placed centrally on the pad box. However, the pivotal connection between the pad-supporting members is such as to permit limited relative heightwise movement of the adjacent portions of the pad supporting members. The pivotal connections between the supporting members cooperate with the vertical guideways 54 to locate the pad box lengthwise of the carrier.

The shoe-engaging pad rests directly upon the upper surface of the blocks 42 and 43 and is shown in Fig. 4 to comprise a lower layer of rubber 12 and an upper layer of leather M, the pad being secured in place by spring clips 16 adjustably carried by the side walls of the pad-supporting members by screw and slot connections 73.

The blocks 24, 26 by which the rolls 30, 32 are carried are arranged to be adjusted lengthwise of the swinging carrier ID to control the pressure distribution on the forepart and shank portions of the shoe as described more fully in Patent No. 2,289,360 referred to above. For this purpose screws 80, 82 are threaded through the blocks 24, 26 and extend through bosses 84, 86 (Fig. l) on the carrier [0. Lengthwise movement of the screws within the bosses is prevented by collars 86 engageable with the inner surfaces of the bosses and knurled heads 9!] engageable with the outer surfaces of the bosses. It will be obvious that upon rotating either of the screws by means of its knurled head the respective block 24, 26 will be adjusted lengthwise of the carrier l thereby to adjust the relative positions of the supporting rolls 30 32 and the pad-supporting members. The roll carrier 28 is swivelly mounted in the block 24 to permit adjustment of the carrier so that the rolls 36 will properly contact the bottom surface of plate 38 which as shown in Figs. 1 and 4 assumes an inclined position during the pressureapplying operation. lhis position is assumed because it pivots at an angle with respect to the pad-supporting member 38. In order to maintain the pad-supporting members in the positions into which they have been moved, after a shoe is removed therefrom, a pair of springs 92 engage the side Walls 46 of the pad-supporting member 36, these springs being suitably secured to the carrier I0.

In the operation of the machine the blocks 24, 26 will be adjusted to obtain the desired pressure distribution over the bottom of the shoe. A shoe is then placed on the pads l2, 14 with its ball line coinciding generally with the joint between the pad-supporting members. When the pad box is moved upwardly to carry the shoe into engagement with the shoe supports it, Zil the padsupporting members 34, 36 will swivel about the supporting rolls 3!), 32 the forepart-supporting member 34 pivoting relatively to the supporting member 35 about the axis formed by the lugs 50, 52. Becausepf the axis about which the forepart-supporting member pivots, which axis corresponds generally to the ball line of the shoe, the forepart-supporting member will assume the correct angular position with respect to the other portions of the pad automatically in response 1 to the application of pressure irrespective of the heel height of the shoe being operated upon. Furthermore, the forepart-supporting member will underlie substantially the entire forepart of the shoe but will not extend rearwardly therebeyond so that uniform pressure distribution is readily obtained throughout the shoe bottom. It is appreciated that the angular relation between the ball line and the center line of the shoe is not the same for all shoes but by selecting the proper angle between the pad-supporting members a close approximation is possible regardless of the type or style of shoe to be operated upon.

In Figs. '7 and 8 there is shown a modification in which lateral tipping movement of the supporting member for the heel portion of the pad is made possible. Interposed between the padsupporting block 48 and the supporting plate M therefor is a roll 95 which is supported by a plate 95 having a V-shaped recess in its upper surface. The plate 96 is swiveled on the supporting plate 44 by a pivot 98, the rearward end of the plate carrying a screw I06 which projects downwardly through, a slot H32 in the plate 44, the plate being clamped in adjusted position by means of a wing nut Hi l. A pair of springs 106 are interposed between the block 48 and the supporting plate M, normally to maintain the block in a central position as shown in Fig. 8. To prevent unintentional displacement of the block 68 heightwise of the pad box the side walls 46 carry angular plates H18 which overlie the marginal portions of the pads 12, 74.

As described in Patent No. 2,289,360 the roll 94 by which the block 48 is supported for lateral tilting movement may be adjusted with its supporting plate at to control the distribution of pressure laterally of the shoe bottom, the block 48 pivoting thereon in response to the application of pressure to the shoe so that the predetermined relative pressures on the inside and outside of the shank portions of the shoe are readily obtained. The action of the forepart-supporting member for the pad is identical to that of the supporting member of Figs. 1 to 6 but somewhat better control of the pressure distribution over the shoe bottom may be obtained in certain cases by employing the roll 9d between the pad-supporting block 43 and the supporting plate 44.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging the shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, and means for hinging said members together about an axis generally coincident with the ball line of a shoe centrally placed on the pad.

2. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, means supporting said members for rocking movements about axes extending transversely of the pad, and means hinging said members together about an axis generally coincident with the ball line of a shoe centrally placed on the pad.

3. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, means supporting said members for rocking movements about axes extending transversely of the pad, and means hinging said members together about an axis generally coincident with the ball line of the shoe centrally placed on the pad, said hinging means being constructed and arranged to permit relative heightwise movement of the adjacent portions of the supporting members.

4. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, means mounting said members for rocking movements about axes extending laterally of the pad, and means constraining the adjacent edges of said members for movement in a vertical plane oblique to the longitudinal center line of the pad.

5. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portions of the pad, the adjacent portions of said members meeting along a line oblique to the longitudinal center line of the pad, means mounting said members for rocking movements about axes extending laterally of the pad, and means constraining the adjacent edges of said members for movement in a vertical plane oblique to the longitudinal center line of the pad.

6. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, member arranged to underlie sub- 7 stantially the entire forepart of a shoe forwardly from the ball line, a member arranged to underlie substantially the entire shank and heel portions of the shoe rearwardly of the ball line, the adjacent ends of said members being generally parallel with the ball line of a shoe on the pad, and means mounting said members for rocking movements in response to pressure applied thereto by a shoe whereby substantially uniform pressure is applied throughout all portions of the shoe bottom.

7. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member arranged to underlie substantially the entire forepart of a shoe forwardly from the ball line, a member arranged to underlie substantially the entire shank and heel portions of the shoe rearwardly of the ball line, means mounting said members for rocking movements in response to pressure applied thereto by a shoe, and means constraining the adjacent portions of said members for movement in a vertical plane substantially parallel with the ball line of a shoe on the pad.

8. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, rolls supporting said members for rocking movements about axes extending transversely of the pad, means for adjusting said rolls lengthwise of said supporting members, and means constraining the adjacent edges of said members for movement in a vertical plane oblique to the longitudinal center line of the pad.

9. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad,

the adjacent portions of said members meeting along a line oblique to the longitudinal center line of the pad, a roll support for the first supporting member, a roll support for the second supporting member, said roll supports being arranged to support said members for rocking movements laterally of the pad, means for individually adjusting each of said roll supports lengthwise of the pad, means mounting the roll support for the second named supporting memher for swiveling movement about a vertical and means constraining the adjacent edges of said members for movement in a vertical plane oblique to the longitudinal center line of the pad.

10. Apparatus for use in applying pressure to shoe bottoms, comprising a pad for engaging a shoe bottom, a member for supporting the shank and heel portions of the pad, a separate member for supporting the forepart portion of the pad, means mounting said members for rocking movements about axes extending transversely of the pad, means mounting the first named supporting member for rocking movements about an axis extending lengthwise of the pad, and means constraining the adjacent edges of said members for movement in a vertical plane oblique to the longitudinal center line of the pad.

FRED V. HART.

REFERENCES GK'IEED UNITED STATES PATENTS Name Date Hart July 14, 1942 Number

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