US1574078A - Shoe-worker's press - Google Patents

Description

Feb. 23 1926' A. F. FROUSSARD SHOE WORKER S PRESS Filed March 14, 1924 3 Sheets-Sheet 1 INVENTOR 6(A f. FROUSSARD ATTORNEY Feb. 23 1926. 1,574,078

A. F. FROUSSARD SHOE WORKER S PRES S Filed March 14, 192 3 Sheets-Sheet 2 g 44 4 \NVENTOR A.F.FROUSSARD ATTORNEY 4 Missouri, United Patented eb. 23, 1926.

ALBERT F. FROUSSARD,

PATENT OFFICE.

OF ST. LOUIS, MISSOURI.

SHOE-WORKERS PRESS.

Application filed March 14, 1924. Serial No. 699,195.

To 'aZl whom it may concern:

Be it known that I, ALBERT F. FROUSSARD, a citizen of the United States of America, residing at the cit of St. Louis, State of tates of America, have invented a certain new and useful Shoe- Workers Press, of which the following is such a full, clear, and exact description as will enable anyone skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin s, forming part of this specification.

34y invention relates to a shoe workers press and is particularly adapted for applying what is known as press downs for flattening the edges of the uppers against the soles of unturned shoes. It is also suitable for actuating a cutter to form ornamental cut-outs in shoe leather and for other similar purposes. My invention also relates to certam attachments adapted for use in the press.

In the accompanying drawings Figure 1 is a side elevation of the press; Figure 2 is a front view; Figure 3 is an enlarged section taken on the line 3--3 of Figure 1;

Figure 4 is a section taken on the line 44 of Figure 2; Figure 5 is a section taken on theline 5-5 of Figure 2; Figure 6 is a sect1on taken on the line 66 of Figure 7 ;'Figure 7 is an enlarged section taken on the line 77 of Figure 4; Figure 8 is a section taken on the line 88 of Figure 5; Figure 9 is a front view of the presser showing a modification; Figure 10 is a section taken on the line 10-10 of Figure 9; Figure 11 is a plan view of the bottom plate shown in Figures 9 and 10; Figure 12 is a plan view of a presser bottom plate showing a further modification; Figure 13 is a front view of a presser carrying theplate shown in Figure 12; Figure 14 is a section taken on the line 14-14 of Figure 13; Figure 15 is a sectional view of a cutting die, thesection being taken on the line 15--15 of F igure17 Figure 16 is a section taken on the line 16-16 of F igure 17 Figure 17 is a bottom plan view of the cutting die; and Figure 18 is a plan view of a cutting block adapted to cooperate with the die shown in Figures 15 to 17.

The frame of the machine comprises a base 20 and a pair of uprights 21 connected to a point intermediate of their height by a plunger bearing 22. The upper ends of the uprights 21 project forward over the base and are provided with pillow blocks 23 the disk 43.

forming bearings for the shaft 24. Shaft 24 is provided, between the bearings 23, with an eccentric preferably formed integral with the shaft. An eccentric strap 26 surrounds the eccentric and is pivoted by pin 27 to the plunger 28 sliding in plunger bearing 22. Formed in the lower end of the plunger 28 is a cylindrical opening 29 (Figure 5) to receive a collar 30 having a knurled flange 31. Formed in the collar 30 is an annular groove 32 adapted to be engaged by a pair of set screws 33. The interior of the collar 30 is threaded to receive a threaded stem 34. To prevent the rotation of the stem 34 it is provided with a key way engaged by the end of a set screw 35 (Figure 3). This set screw is located slightly above the collar 30 so as not to interfere with the rotation of the latter. A jamb nut 36 surrounds the stem below the flange 31 and serves in addition to the set screws 33 for firmly locking the parts after adjustment. Formed in the=lower end of the stem 34 is a tapered socket in which the various attachments are adapted to be secured by set screws 37 as will be hereinafter described.

Loosely mounted on the end of the shaft 24 is a pulley 40 which also serves as the fly wheel of the machine. Secured to the hub of the pulley is a steel disk 41 having in its face a recess 42 and forming one member of the clutch by which intermittent motion is applied to the plunger 28. The second member of the clutch comprises a disk 43, formed integral with the shaft, and a pair of dogs or detents slidingly mounted therein as best shown in Figure 7. Heads 45 on the dogs 44 are each provided on the inner side with a flattened face 46 making sliding contact with a corresponding flat face on a collar 47 on the shaft. Central apertures in the dogs 44 each contain a coil spring 48 Y and a plunger 49. The ends of the plunger 49 bear against a disk 50 secured to the adjacent pillow block 23 and thus through the spiral springs tend to force the dogs against Formed in the outer side of each of the heads 45 is an inclined slot 51 which, by engagement with a retracting finger may withdraw the dog from the recess 42. Secured to the right-hand pillow block 23 is a fixed retractor 52, while a movable retractor 53 is mounted in a bracket 54 secured to the frame. The retractor 53 is actuated by a rod 55 controlled by a treadle (not shown).

When the movable retractor 53 is in operative position, as shown in Figure 2, both dogs will be held away from the disk 41 so that the pulley will run idly Without imparting any movement to the plunger. As this may occur not only at the lower end of the plunger stroke, as shown in Figure 2-, but also at the upper end of the stroke, it will be evident that any desired amount of dwell may be secured with the plunger either raised or lowered. As long as the retractor 53 is held out of operative position the plunger will be alternately raised and lowered with a dwell equal to the time of onehalf revolution of the pulley between each movement. In practice, however, the detent 53 is always returned to normal position immediately after the movement has begun as a dwell of substantial duration is necessary both at the lower end of the stroke to complete the pressing of the shoe, and at the upper end of the stroke to remove and insert the work.

In Figures 1, 2, 4 and 5 I have shown my preferred form of presser. A yoke 56 is provided with a conical boss 57 (Figure 5) held in the socket in the lower end of the stem 34 by the set screw 37. Pivotally secured to the lower face of the yoke by a bolt 58 is a circular plate 59 having formed in it recesses 60 corresponding in shape to the toe of a shoe. In the drawings (Figure 4) I have shown the plate provided with four such recesses which may correspond to four sizes or styles of shoe in case the shape of the toe is such that different forms are not necessary for rights and lefts, or two styles or sizes in case this is necessary. The different recesses 60 are brought into operative position by rotating the disk and may be locked in position by any suitable means such asby a pin 61 passing down through the yoke and corresponding holes 62 in the plate. In order to heat the plate I provide a pair of heating blocks 63 either formed integral with and secured to the yoke and each provided with a cylindrical opening to receive an electrical heating unit of any usual construction.

The presser cooperates with a table 65 carried on a stud 66 passing through openings in the base 20 and a supporting plate 67 carried below the base by bolts 68. Guide pins 69 insure the parallel movement of the table and the table is normally forced upwardly by a coil spring 70 surrounding the stud 66 and situated between the table and supporting plate. The lower end of, the stud 66 is threaded to receive a pair of lock nuts 71 by means of which the upward movement of the table may be limited. By varying the upward movement of the table and the length of the plunger the necessary amount of pressure to flatten the shoe may be regulated with great accuracy. To vary the length of the plunger the nut 36 is loosened as well as the set screws 33, the latter, however, are only loosened sufficiently to allow the collar 30 to rotate and not sufficiently to become disengaged from the groove 32 and thus to allow it to move longitudinally. After the nut and screws have been loosened the collar is rotated to the right or left by the knurled flange 31. As the stem is prevented from rotating by the screw 35 engaging with the key way, it will be lowered when the flange is rotated to the right and raised when it is rotated to the left. After the proper adjustment is secured the set screws 33 and nut 36 are tightened, thus rigidly securing the parts in position.

In Figures 9, 10 and 11 I have shown a modified form of presser in which the yoke 56 has secured to its lower face by bolts 75, a bottom plate 76 having in its forward end a rectangular o ening.77 the edges of which are dove-talled to receive correspondingly shaped plates 78, in which the recesses 60 are formed. In this form only a single heating block 63 is used and is secured in transverse position as shown in Figure 10. In the form of presser heretofore described, the several recesses 60 are formed in a single plate which is kept warm by the heating block so that no time is lost in warming up the presser when a change is made in the style or size of shoe operated upon. In order to accomplish the same result with the form of presser now described I extend the plate bottom 76 to the rear to form a shelf upon which the extra forming plates 78 may be stored. A bracket 7 9 holds the plates against the heating block. As the bracket is held in position by a bolt 80 sliding in a slot 81 in the bottom plate, it may be adjusted to accommodate a varying number of plates 78.

A further modification of the presser is shown in Figures 12, 13 and 14. This modification is adapted to shoes having toes of such shape that several sizes may be ac commodated by opening and closing the recess 60 with the central point A of its front end as a pivot. In this form of presser the bottom plate comprises two parts 82 held against the under face of the yoke by screws 83 passing through curved slots 84 having the point A as their center of curvature. To insure the proper movement of the plate a second pair of curved slots 85, also having the point A as a center of curvature, is provided, each of which is engaged by a pair of guide-pins 86. A spring 87 bearing against tail pieces 88 carried by the plate 82 normally tend to close the recess 60. The spring 87 is carried by a headed pin 89 on the under face of tho yo te.

In Figures 15 to 18 I have shown a die adapted for use in my press which may be used for perforating the uppers of ladies ventilated shoes. The die comprises upper and lower blocks 90 and 91, respectively, secured together by screws 92 and a block plate 93 secured to the block 90 by screws 94. The upper block 90 is provided with a conical boss 57 similar to the boss 57 heretofore referred to and adapted to be secured in the stem 34 by set screws 37. Cutting edges 95 are either formed integral with or secured to the lower block 91. In the die shown in the drawings the cutting edges are so arranged as to form a pair of triangular perforations. The pieces cut out by the die pass up through channels 96 in the lower block into forwardly opening discharge passages 97 formed in the block 90 and tapering in longitudinal section as shown in Figure 16. Ejectors 98 having inclined front faces are secured to the plate 93 by screws 99. These ejectors 98 force the pieces of leather, or other material cut, out through the tapering discharge passages 97 thus making the die self clearing. As the die will cut more eifectively against a fixed than a yielding surface the spring mounted table 65 is preferably replaced-by a cutting plate 100 (Figure 18) secured directly to the base 20 when the die is used in the press. In order to accurately position the work 101 below the die I provide a number of guidepins 102 which are carried on slotted arms 103 so as to be adjustably secured to the plate 100 by screws 104. The pins may thus be arranged to properly position various forms of work beneath the die. hen the press is used for cutting it is not necessary that the plunger dwell at the lower end of the stroke therefore the dog 44 which stops the press at the lower end of the stroke when withdrawn by the finger 53 is removed as Well as the finger 52, when the press is to be used for this purpose. The press will now make a. complete double stroke each time the remaining dog 44 is allowed to engage with the member 41 by the withdrawal of the finger 53 and the plunger will only stop at the upper end of its stroke.

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

1. In a device ofthe class described, the combination with a plunger provided with a recess in its lower end, of mechanism for intermittently actuating said plunger, an internally threaded collar rotatably mounted in said recess, means for preventing the longitudinal movement of said collar relative tosaid plunger, a threaded stem engaging said collar, and means for preventing the rotation of said stem relative to said plunger.

2.'In a device of the class described, the combination with a plunger provided with a recess in its lower end, of mechanism for intermittently actuating said plunger, an in ternally threaded collar rotatably mounted in said recess and provided with an annular groove, a set screw engaging with said groove to prevent relative longitudinal movement between the collar and plun er and to also look said parts against relative rotary movement, a threaded stem engaging said collar, and means for preventing the rotation of said stem relative to said plunger.

3. In a device of the class described, the combination with a plunger provided with a recess in its lower end, of mechanism for intermittently actuating said plunger, an internally threaded collar rotatably mounted in said recess and provided with an annular groove, a set screw engaging with said groove to prevent relative longitudinal movement between the collar and plunger and to also look said parts against relative rotary movement, a threaded stem engaging said collar, means for preventing the rotation of said stem, and a jamb nut on said stem. 7

4. In a device of the class described, the combination with a plunger, of mechanism for intermittently actuating said plunger, said plunger being adjustable in length, a presser carried by said plunger, and a yielding table cooperating with said presser.

5. In a device of the class described, the combination with a plunger, a mechanism for intermittently actuating said plunger, said plunger being adjustable in length, a presser carried by said plunger, a spring mounted table cooperating with said presser, and adjustable means for limiting the upward movement of said table.

6. A shoe presser comprising a yoke, a heater carried by said yoke, a bottom plate carried by said yoke, and means for adapting said bottom plate to press different shoes.

7. A shoe presser comprising a yoke, a heater carried by said yoke, a bottom plate also carried by said yoke and adapted to present a plurality of different toe openings to a shoe.

8. A shoe presser comprising a yoke. a heater carried by said yoke, a bottom plate also carried by said yoke, and a plurality of presser plates provided with toe openings arlid interchangeably carried by said bottom p ate.

9. A shoe presser comprising a yoke, a heater carried by said yoke, a bottom plate also carried by said yoke, a plurality of presser plates provided with toe openings and interchangeably carried by said bottom plate, and means for holding the inoperative presser plates adjacent to the heater.

10. A shoe presser comprising a yoke, a

heater carried by said yoke, a two part bottom plate carrier by said yoke and provided with a toe opening formed'between them,

and means for moving the parts of said plate actuated means for moving the parts of said relatively to each other to vary the size of plate with the point of the toe opening as a the toe opening. pivot. I

11. A shoe presser comprising a yoke, a In testimony whereof, I have hereunto set 5 heater carried by said yoke, a two part botmy hand this the 11th day of March, 1924:.

tom plate carried by said yoke and provided with a toe opening between them, and spring ALBERT F. FROUSSARD.

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