US2748404A - Machine for applying ribs to shoe soles - Google Patents

Description

June 5, 1956 M. E. PEHRSON 2,748,404

MACHINE FOR APPLYING RIBS TO SHOE SOLES 3 Sheets-Sheet 1 Filed Sept. 23, 1954 a f, E .m l/ R9 wir W l\ T m m V m auf June 5, 1956 M. E. PEHRsoN 2,748,404

MACHINE FOR APPLYING RIBS TO SHOE SOLES Filed Sept. 23, 1954 3 sheets-sheet 2 1N V EN TOR.

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June 5, 1956 M. E. PEHRSON MACHINE FOR APPLYING RIBS TO SHOE SOLES 5 Sheets-Sheet 3 Filed Sept. 23, 1954 BY {M7/W limited States Fatent O MACHINE FOR APPLYING RIBS T SHOE SLES Manfred E. Pehrson, Malden, Mass., assigner to Prime Manufacturing Company, Lynn, Mass., a corporation of Massachusetts y l Application September 23, 1954, Serial No. 457,953

9 Claims. (Cl. 12-20) This invention comprises a new and improved machine for applying binding, stripping or ribbing to form an upstanding wall about the marginal edge of a sole, such as a platform or midsole.

There are many instances in the shoemaking industry where it is desired to employ a flat unchanneled sole blank and erect upon it a peripheral wall or flange that will give apparent width or thickness to that element of the shoe, or provide a cavity for the reception of the lasted upper.

One important eld of use for the machine of this invention is in the manufacture of rubber soled shoes where it is desired to employ a midsole of substantial thickness and to cover the wall of the sole with a finished strip of rubber in the completed shoe. A binding strip suitable for this purpose is disclosed and claimed in my co-pending application Ser. No. 309,485, filed September 13, 1952. It includes in its structure a continuous still rectangular co're, a soft cylindrical core extending along the inner surface of the rectangular core near one edge thereof, and a tape adhesively secured to the outer face of the rectangular core and extending outwardly beyond one edge thereof while being wrapped about the other edge of the rectangular core and also about the cylindrical core. This binding strip is supplied with its marginal edges folded outwardly so that all adhesive coated faces of the tape will face in the same direction and the binding may be coiled without blocking for convenient distribution to the manufacturer.

For purposes of illustration the machine of my invention will be described as it is organized for applying the binding strip above identilied. My improved machine is organzed to handle the sole right side up or with the applied wall projecting upwardly instead of downwardly as in previous rib applying machines. This arrangement has the advantage of affording the operator better Visibility and more convenient control of the work in progress.

These and other features of the invention will be best understood and appreciated from the following description of the embodiment referred to which is selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. l is a view in side elevation of the operating portions of the machine, y

Fig. 2 is a View in perspective showing the binding strip as it is supplied to the machine,

Figs. 3 and 4 are cross-sectional views on the lines 3--3 and 4-4 of Fig. 2,

Fig. 5 is a Yplan view corresponding substantially to Fi l,

Fig. 6 is a fragmentary View in elevation and on an enlarged scale of the binding strip guiding mechanism,

Fig. 7 is a fragmentary 'View in elevation at right angles to that of Fig. l, and

Fig. 8 is a fragmentary sectional view on an enlarged scale showing `the binding strip in place upon a midsole.

An understanding of the machine will be facilitated `by a description of the binding strip handled -by it and of the llnished product as illustrated in Figs. 2, 3, 4 and 8.

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2 In Fig. 8 is shown a portion of a flat sole blank 10 which 1n this case comprises plies of cork and fabric about 1A" in aggregate thickness. The binding strip comprises a rectangular core 11 which may be of any suitable tough material that is llexible in width-wise bending but stiff and resilient against height-wise pressure, such as pasteboard, fibreboard or folded kraft paper. This stiff rectangular core is associated with a thick soft core 12 of cotton, crepe paper or the like, having approximately the consistency of a wick and being flexible and compressible into appropriate shape in the steps of forming or applying the binding strip. The core 12 is herein shown as adhesively attached to one face of the rectangular core 11 and extending along one edge thereof. The third element of the strip comprises a tape 13 which may be of textile material or other tough, strong and pliable strip material capable of carrying an adhesive and forming an adhesive bond with the other elements of the strip and with the sole blank to which the strip is to be attached. Both faces of the tlat core 11, the surface of the soft core 12, and one face of the tape 13 are coated with pressure or heat-activatable adhesive. The intermediate portion of the tape 13 is initially bonded to the outer face of the core 11. The tape extends about and is bonded to the inner face of the core 12 and its coated margin 14 is initially folded back as shown in Fig. 4 so that all the adhesive faces of the tape are directed in the same direction and the binding may be packaged in a coil 16. As herein shown the binding is led from the coil 16 through guiding means to the operating instrumcntalities of the machine.

The machine comprises a frame 2t) in which is mounted a sole supporting roll 21 freely rotatable upon a stud 22 projecting from a bracket plate 23. The plate is keyed to the frame as shown in Fig. 5 and with provision for vertical adjustment. It is secured rigidly in the desired position by means of a clamping bolt 24 threaded into the frame.

Adjacent to the supporting roll 21 is provided a biased feed roll 25 freely rotatable about a stud carried by a bracket 26 which, as shown in Fig. l, is mounted with provision for vertical adjustment upon the bracket plate 23 and provided with a clamping bolt 2'7. A wide sole supporting roll 28 of small diameter is carried by a bracket 29 also adjustably mounted on the bracket plate 23 and provided with a clamping bolt 30.

The rolls 21 and 28 serve to support the sole in horizontal position as it is fed longitudinally through the machine, while the biased roll 25 supports and at the same time tends always to deflect the sole inwardly or transversely and maintain it in contact with an edge gauge roll 32. The edge gauge roll 32, as best shown in Figs. l and 5, projects upwardly and concentrically from a ilat wiper disk 33 secured to the upper end of a Vertical shaft 34 journaled in the machine frame and having a bevel gear 35 fast upon its lower end. The gear 35 meshes with a bevel gear 36 fast upon the end of a horizontal shaft 37. At its rear end the shaft 37 is provided with a pulley 3S over which runs a round belt 39 passing over an idler 4t) which is rotatable with a shaft 41 at the rear of the machine frame. The belt passes from the idler 4@ upwardly to a pulley fast to the main shaft 45 of the machine.

The main shaft 45 and a counter shaft 46 each carry a pair of eccentrics upon which are mounted arms carrying feed feet 43 and 44. The eccentrics are set so that the feed feet operate alternately to engage, advance and release the work inthe manner fully disclosed in United States Letters Patent No. 1,794,204, Ridderstrom, as the sole is supported upon the rolls 21, 25 and 28.

The binding strip is guided to the point of application by mechanism which will now be described. The point of application is indicated in Fig. 7 as dened by the wiper disk 33, the edge gauge roll 32 and the feed foot 44. A bracket arm 59 projects rearwardly from the frame as indicated in Figs. and 6 and is secured to the frame by a clamping plate 51 and bolts 52. At its rear end it is provided with a cylindrical standard 53 to the upper end of which is secured an elongated carrier bar 54 by means of a spindle 55 threaded into the standard 53. The connection between the carrier bar 54 and the spindle 55 is such as to permit appreciable lost motion and a leaf spring is provided for yieldingly holding the carrier bar in any position of adjustment. A stop plate 56 is secured to the standard 53 and this is provided with upstanding stops 57 and 59 which limit the swinging movement of the carrier bar 54 to the width of the stop plate as suggested in Fig. 5. Provision for limited vertical adjustment of the carrier bar 54 is afforded by a screr.l 5? threaded into the carrier and bearing on the stop plate 56.

The carrier bar 54 carries at its outer end an angle bracket 60 which is secured thereto for longitudinal adjustment by screws 61 and 62. To the vertical arm of the bracket 60 is secured a block 63 and to this is pivotally connected a gauge block 64 by means of a vertical spindle 65. The gauge block 64 is provided with a passage shaped to receive the binding strip with its longer dimension vertically disposed. An angular gauge foot 66 is adjustably secured to the outer face of the block 64 by a bolt 67. This in cooperation with the lower face of the gauge block 64 provides passage for the margin 14 of the binding strip which is eventually to be located upon the upper face of the sole 10. To the gauge block is secured a flat bar 68l by means of a bolt69. Suspended from this bar, as shown in Figs. 1 and 5, is an edge guide 70 adjustably held in place by a clamping bolt 71. A Vertical guide roll 72 rotatable about a spindle 73 is located next to the edge guide 70 in an outward direction. A second edge guide 74 is adjustably mounted at the end of the bar 68 by a bolt 75 and this bolt also serves to clamp in position an extension bracket 76 which carries a guide spool 77 rotatable on a vertical spindle 78.

The gauge block 64 and all the parts carried thereby are arranged for angular movement about the spindle 65 limited by the face of the block 63, and a torsion spring 79 which is coiled about the screw 62 tends to hold all the strip guiding parts in predetermined position while permitting them to be displaced rearwardly as indicated in Fig. 5 to facilitate threading the binding strip into the machine.

The highest points of the sole-supporting roll 21 and of the biased roll 25 are located in substantially the same horizontal plane, and with the roll 2S determine the level of the sole as it is fed through the machine. The upper or operative face of the wiper roll 33 is located in substantially this same horizontal plane and is arranged to pass with a wiping action under the sole carrying with it the ange of the tape.

The feed foot 44, as shown in Fig. 7, has a concave recess permitting it to clear the edge gauge roll 32 in its feeding movement and adapting it to shape the inner face of the binding strip as it is applied to the sole. The outer part of the feed foot is formed as a corrugated rib or blade that engages the work opposite the high point of the roll 21. The gauge block 64 is located as closely as possible to the line of contact between the edge gauge roll 32 and the work, that is to say, the sole 10 and the upright portion of the binding strip formed by the core 11 and the tape 13. The vertical position of the gauge block is controlled by the adjusting screw 58 while its radial position about the spindle 55 is adjustably controlled by a set screw in the stop 57.

In addition to its gauging function the edge gauge roll 32 cooperates with the biased roll 25 in subjecting the binding strip to pressure against the sole edge. The biased roll continuously pushes the sole toward the right as seen in Fig. 7 and the transverse pressure thus developed is resisted by the roll 32.

In operation the binding strip is led from the coil 16 in horizontal position as indicated in Fig. 4, and in passing to the guide spool 77 it is given a quarter twist so that it leaves the spool 77 and the guide elements 74, 72. and 71 in vertical position as indicated in Fig. 3. In this position it passes into and through the gauge block 64.- which is located closely adjacent to the point of application dened by the sole supporting roll 21, the edge gauge roll 32, the wiper disk 33 and the feed foot 44, all as'- shown in Fig. 7. At this point the exposed portion of the core 11 is pressed against the marginal edge of the sole 1t? by the action of the biased roll 25 and caused tof adhere thereto. The marginal portion 15 of the tape which is delivered from the gauge block 64 in vertical position is engaged by the wiper disk 33 and wiped inwardly under the bottom marginal edge of the sole. Simultaneously the upper marginal portion 14 of the tape is: engaged and pressed iirmly into adhesive contact with the upper face of the sole 10, The presser foot is then operated to press the two flanges 14 and 15 securelyr against the underlying and overlying portions of the sole and so form a rm adhesive bond that maintains the wallI thus formed in erect position about the margin of the sole. The feed foot at the same time compresses and compacts the soft core 12 against the sole and against the edge gauge roll 32 imparting to the core substantially triangular shape thus giving the wall the transverse contour desired and forming a reentrant angle or vertex crease in the tape.

Having thus disclosed my invention and described in detail a preferred embodiment thereof, l claim as new and desire to secure by Letters Patent:

l. A rib applying machine comprising a frame, a freely rotating sole supporting roll mounted therein, a bias feed roll mounted on the frame at one side of the supporting roll for rotating with its work engaging surface located in the same plane as that of the sole-supporting roll, and an edge gauge roll at the other side of the sole-supporting roll and located in position to receive the thrust of a sole imparted to it by the biased feed roll, means supported on the frame for guiding a binding strip with adhesively coated margins to the bite of the edge gauge roll and the sole edge with one margin of the binding strip located above the face of the sole, and an intermittently acting feed foot mounted on the frame and movable for advancing the sole and pressing the margin of the binding strip into adhesive union therewith.

2. A rib applying machine comprising a sole-supporting roll rotatable about a horizontal axis, a biased sole-supporting roll adjnstably mounted outside the first roll and adjacent thereto with the high points of both rolls dispo-sed in substantially the same horizontal plane, au edge gauge roll rotatable about a vertical axis at the other side of the sole-supporting roll and adjacent thereto, and an oscillatory feed foot movably mounted in the machine and shaped to clear the edge gauge roll and to grip a sole against the sole-supporting roll rst mentioned, together with means for feeding a binding strip to a point between the sole edge and the edge gauge roll.

3. A rib applying machine including in its structure a sole-supporting roll rotatable about a horizontal axis, a bias roll mounted at one side thereof and adjacent thereto, a wiper roll mounted in the machine at the other side of the sole-supporting roll and being rotatable about a vertical axis with its operative face disposed in substantially the same horizontal plane as the sole engaging face of the sole-supporting roll, and an edge gauge roll mounted concentrically with and above the wiper roll.

4. A rib applying machine as described in claim 3 further characterized by a vibrating feed foot mounted in the machine and having a concave recess and a workengaging face disposed adjacent to the edge gauge roll and shaped for compressing and conforming an interposed binding strip against said roll. v

5. A rib applying machine including in its organizations a sole-supporting roll rotatable about a horizontal axis and having a flat inner face, a vertical shaft mounted parallel to the said inner face of said roll, driving connections to said shaft, a wiper roll carried by said shaft with its face disposed at the same level as the sole engaging face of the sole-supporting roll, an edge gauge roll concentrically mounted above the wiper roll, and means for continuously biasing toward the edge gauge roll a sole supported atwise by said solesupporting roll whereby the wiper roll may apply to the bottom of the sole portions of an adhesive binding.

6. A rib applying machine comprising sole-supporting means, associated concentric wiping and edge gauging rolls one located above the other, and a guide block pivotally mounted in the machine adjacent to the edge gauge roll and having a recess presenting vertical and horizontal guide faces separated by a recess for receiving a composite binding strip with adhesive tape sections supported by said faces in right-angular relation whereby the edge gauge roll holds a portion of the adhesive tape against the edge of the sole and the wiping roll applies another portion to the under side of the sole as it is presented by said sole-suporting means.

7. A rib applying machine comprising sole-supporting means, an edge gauge cooperating with said supporting means and means for supplying a composite binding strip to a sole gauged thereby, comprising a spool rotatable about a horizontal axis, a pivotally mounted arm carrying a gauge block adjustably located adjacent to the edge gauge and shaped to direct a marginal portion of adhesive tape into position about a sole supported by the solesupporting means, and guiding elements for twisting the binding strip through substantially 90 in passing from the coil to said gauge block.

8. A rib applying machine having sole-supporting means, means mounted on the machine for guiding a binding strip to the edge of a sole supported in flat condition thereon, and means mounted in the machine for subjecting the strip to transverse attaching pressure comprising a biased sole-engaging roll rotatable about a horizontal axis inclined to the edge of the sole and a pressure resisting roll located in opposed relation to the biased roll.

9. A machine for attaching an upstanding wall to the peripheral edge of a flat sole, comprising a primary solesupporting roll mounted in the machine and rotatable about a horizontal axis, a supplementary supporting roll mounted in the machine with its sole engaging face in the same plane as the primary roll, sole feeding feet acting alternately upon a sole at a point above said primary roll to advance the sole in a direction at right angles to the axis of the primary sole-supporting roll, a wiper roll mounted in the machine adjacent to the supporting roll with its operative face movable beneath a sole sup` ported thereon for laying an adhesive tape on the under side of the sole, and an edge gauge disposed above the wiper roll and opposite to the peripheral edge of the sole, the feed Ifeet having portions operative for laying an adhesive tape on the upper face of the sole.

References Cited in the file of this patent UNITED STATES PATENTS 484,130 Arnold Oct. l1, 1892 690,422 Hadaway Jan. 7, 1902 1,004,614 Hinter Oct. 3, 1911 1,629,473 Brackett et al. May 24, 1927 2,142,332 Ridderstrom Jan. 3, 1939 2,353,738 MacKenzie July 18, 1944 2,400,074 Christiansen May 14, 1946 2,433,053 Knott Dec. 23, 1947 2,654,103 `Ridderstrom Oct. 6, 1953 2,657,405 Ridderstrom Nov. 3, 1953 2,678,454 German May 18, 1954

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