US2042868A - Upper roughing tool - Google Patents

Description

June 2, I J F SMITH I 2,042,86

UPPER ROUGHING TOOL Filed July 19, 1935 mums- Patented June 2, 1936 UNITED STATES PATENT OFFICE Compo Shoe Machinery Corporation, New

York, N. Y., a corporation of Delaware Application July 19, 1935, Serial No. 32,155

Claims.

This invention relates to roughing tools used for roughing or abrading shoe parts so as to prepare them for subsequent cementing operations. It is generally useful wherever roughing 5 is required in shoe manufacturing operations,

and in the form here illustrated is particularly useful in upper roughing operations wherein the overturned lasting allowance of a shoe upper is prepared for subsequent cement afiixation .to an 19 outsole.

Such upper materials frequently comprise delicate leathers and/or fabrics and considerable difi'iculty is encountered in providing a serviceable type of roughing tool which is capable of satisfactory use on such materials.

An object of the invention is to provide a tool for performing this and related roughing operations having improved features of construction which render it particularly suitable and desirable 20 for its intended work.

Heretofore, one generally used type of tool for this work has comprised a rotatable roughing brush having radially extending wire bristles set in a central hub which is adapted to berotated at a suitable speed. It has been found that a better roughing action is obtained by spacing the roughing portions along the periphery of such a brush so that an intermittent, though rapid, roughing efiect is provided, as is taught in British Patent No. 237,329. Another device utilizing the benefits of such an intermittent roughing action is shown in the Sachse et al. U. S. Patent No. 1,818,011, which provides the additional feature of an adjustable mounting forthe roughing bristles so that they may be expanded as they become worn.

In both these constructions the roughing elements comprise cardclot strips, which are strips of heavy canvas or the like having metal bristles or prongs inserted therethrough. The nature of leather roughing work is such that if these prongs are rather short, as is the case with card cloth strips, the vibration to which they are subjected tends rapidly to crystallize them so that they break off and impair the functioning of the roughing tool. This difilculty was avoided in the above discussed rotary bristle brushes comprising a metallic hub which, because of the absence of centrally located adjusting mechanism such as that employed in the Sachse device, could be made of suificiently small internal diameter to enable the provision of relatively long bristles while not exceeding practical requirements as to the outside diameter of the entire brush. The effect of vibration on these longer bristles does not have so rapid a :crystallizmg action and they are capable of giving much longer service, both because they do not crystallize readily and because they provide more material to be worn away. A standard form of such rotary roughing brush, for example, comprises a hub of metal such as babbitt, having an internal diameter of two inches, in which long wire bristles are embedded and from which they extend outwardly to provide a brush having an outside diameter of six inches when new. In such a brush each bristle is free, that is, not embedded in the hub, for at least 1 /2" of its length.

With these characteristics of earlier devices in mind, it will be apparent that a further object of the present invention is to provide a rotary roughing tool having the advantages of an intermittent roughing action, in which spaced groups of roughing bristles are mounted for radial adjustment, and in which the mounting and adjustment are of such a nature that relatively long bristles on the order of those employed in heretofore used rotary roughing brushes may be employed without exceeding the over-all dimensions of such brushes. This last feature is of value in that it enables the size and weight of the device to be kept within practical limits and at the same time provides a rotary rougher having a sufficiently sharp degree of curvature at its periphery to function in the desired manner.

Another object of the invention is to provide a rotary roughing tool utilizing adjustably mounted spaced roughing bristle sections in which the bristles have substantially the same characteristics as to the extent of their free length in proportion to the over-all diameter of the tool as did the bristles of previously used nonor slow crystallizing roughing brushes, and in fact to provide an adjustable tool wherein segments of such actual brushes may be employed if desired.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter set forth and the scope of the invention will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention reference should be had to the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a side elevation of a rotary roughing tool constructed in accordance with the principles of this inventi n;

Fig. 2 is a transverse sectional view taken along line 2-2 of Fig. 1;

Fig. 3 is a transverse sectional View taken along line 3-3 of Fig. 1; and

Fig. 4 is a vertical sectional view corresponding substantially with line l4 of Fig. 2, one of the bristle sections being removed.

Referring more particularly to the drawing, there is shown a roughing wheel comprising a disc-shaped housing including sidewalls l0 and l I. The sidewall II] has an integral hub 12 which is adapted to be keyed on a suitable driving shaft (not shown). Sidewall IE] also has integral upstanding cylindrical wall sections l3 (Fig. 4) which are spaced so as to provide post openings l4 therebetween. Inwardly extending ribs [5 are cast integrally with sidewall l 6 and the peripheral walls l3 to provide a suitable attaching area for the remaining sidewall H, which is secured snugly thereto by means of screws Hi.

Two opposed blocks 17 are slidably confined within the housing. Each block has an outwardly facing arcuate seat l8, against which a roughing bristle holder, hereinafter described, is adapted to fit and rest. Adjacent this seat I8 and extending outwardly therebeyond from one edge of the block I! is a flange I 9 having an arcuate groove therein. Sidewall I6 is provided with a pair of radially extending elongate slots 2! through which guide pins 22 are passed and screwed into the underlying flanges l 9 in order to confine the block [1 to movement radially along the housing. The opposite side of each block I! has screwed thereto by means of screws 23 a clamping plate 24, each of which has an overhanging section 25 similar to flange l9 and, like the latter, extending outwardly beyond the face of seat l8. This overhanging section is grooved as at 26 and cooperates with groove 20 to hold an arcuate bristle holder 27 fixedly against seat l8.

In the presently illustrated preferred embodiment such bristle holder comprises a segment of metal, such as babbitt or lead, in which the inner ends of wire roughing bristles 23 are embedded. These bristles extend substantially radially outwardly from their holder to or slightly beyond the periphery of the tool housing, being extended through the openings I4 in the periphery thereof. An adjusting screw 29 is provided with oppositely threaded ends which are respectively screwed into internally threaded bores in the blocks I1. An adjusting wheel or capstan 30 is fixed medially to this adjusting screw and is of greater diameter than the distance between the spaced housing sidewalls l0 and II. Sidewall I0 is slotted or grooved as at 3| to accommodate one edge of wheel 30 and sidewall l l is slotted as at 32 to receive the other edge of such wheel. These slots snugly embrace the sides of the wheel and hold it and its attached adjusting screw against movement in the direction of its own axis, with respect to the housing. This confinement of the adjusting screw against movement radially of the housing, together with the confinement of the block I! by means of guide pins 22 to a radial path along the housing, prescribes the movement of such blocks and their attached brush. The slot '32 extends entirely through sidewall In so that access may be had to the periphery of adjusting wheel 30, and a number of pin holes 33 are provided in this periphery in order that a steel pin (not shown) may be inserted therein to turn the screw and move the blocks Il inwardly or outwardly as desired.

Such structure, in accordance with the principles of this invention, is adapted to provide the required adjustable mounting of the bristles, while so compacting the mounting and adjusting mechanism that the bristles may be of suflicient length to avoid or retard crystallization. It will be noted that the inner faces 34 of the sliding block I! may quite closely juxtapose each other, being limited from mutual approach only by the relatively narrow adjusting wheel 3!]. In this connection, it is to be noted that in the illustrative drawing, the blocks are in the slightly expanded position which they will occupy after the bristles have been subjected to some wear. As a consequence, in the preferred form of tool illustrated, the outside diameter of the housing may be 6" in diameter, while the distance between diametrically opposed portions of the holder seats is may be approximately one-third of this distance, or about 2" when the blocks I! are in their innermost adjusted position. In the case of a new and unworn brush, therefore, the free length of each bristle may readily be on the order of a fourth of the over-all diameter of the tool, or approximately 1 /2" while leaving sufiicient room between the seat l8 and their free portions to accommodate the holder 21 in which their extreme inner ends are embedded. It will therefore be seen, that the holders 21 may, if desired, comprise sections cut from the hub of a standard roughing brush of the type described above. This is advantageous in that it enables utilization of these brushes from presently accumulated stock, while providing the further advantages that characterize a tool of the present type. The dimensions suggested herein are not intended to be limiting, but the proportions approximately indicated are highly desirable in that they enable provision of a tool having adjustably mounted bristles of sufiicient free length to avoid early crystallization without unduly exceeding practical limits as to the outside diameter of the entire tool. This provision for relatively long bristle length also provides for greater service life, since as the bristles become worn, they may be repeatedly adjusted outwardly so as to take a proper bite in the roughed material.

The assembly and operation of the device will be apparent from the above description.

It is to be understood that this description is illustrative and that various changes may be made in the structural details shown without de- 7 parting from the invention. Thus the bristles and holders may be of any suitable type, tho-ugh it is preferable to assure adequate free length for the bristles with whatever mounting is used. Also, the bristles may, if desired, be mounted directly in the blocks H in order further to conserve space in which case these blocks should be made of readily replaceable form.

Since certain changes may be made in the above construction and different embodiments of the invention could be made Without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A roughing wheel comprising a disk-shaped housing including spaced sidewalls, a pair of opposed blocks slidably mounted between said sideand having an edge portionextending into and 7 confined against movement radially of said housing by a slot through one of said sidewalls, and roughing bristles carried by each of said blocks and extending outwardly therefrom to the peripheral portion of said housing.

2. A roughing wheel comprising a disk-shaped housing including spaced sidewalls, a pair of opposed blocks slidably mounted between said sidewalls, each of said blocks having an internally threaded bore, an adjusting screw having oppositely threaded ends respectively screwed into said bores, an adjusting wheel fixed to said screw and having an edge portion extending into and confined against movement radially of said housing by a slot through one of said sidewalls, guide means for confining said blocks to radial movement along said housing, and roughing bristles carried by each of said blocks and extending outwardly therefrom to the peripheral portion of said housing.

3. An upper roughing wheel comprising a diskshaped housing including spaced sidewalls, a pair of opposed blocks slidably mounted between said sidewalls, each of said blocks having an internally threaded bore, an adjusting screw having oppositely threaded ends respectively screwed into said bores, an adjusting wheel fixed to the medial portion of said screw, one of said sidewalls having an elongated slot therethrough adapted snugly to embrace an edge portion of said wheel to hold it against movement radially of said housing and to provide access thereto, guide slots in at least one of said sidewalls extending in the direction of movement of said slidable blocks, pin means extending from each block into a respective guide slot, and roughing bristles carried by each of said blocks and extending outwardly therefrom to the peripheral portion of said housing.

4. A roughing wheel comprising a disk-shaped housing, opposed blocks slidably mounted in said housing having arcuate outwardly facing seats, and having inwardly facing closely juxtaposable sides, adjusting means for sliding said blocks radially along said housing, the diametrically opposed portions of said seats, in the innermost adjustable position of said blocks, being spaced a distance approximating a third of the diameter of said housing, a relatively narrow arcuate bristle holder seated against each of said seats, and a plurality of elongate bristles extending outwardly from each of said holders to the periphery of said housing.

5. A roughing wheel comprising a disk-shaped housing, opposed blocks slidably mounted in said housing and having arcuate outwardly facing seats, adjusting means for sliding said blocks radially along said housing, roughing bristle segments mounted on each block, said segments comprising sections of a standard rotary roughing brush having a relatively narrow rim section with an internal diameter approximating a third of the external diameter of the brush, said rim sections being complementary to and fixedly seated against said seats, said housing having an outside diameter approximately equal to that of said brush, and said blocks being locatable within said housing to position the outer ends of said bristles at the periphery thereof.

6. A roughing wheel comprising a disk-shaped housing, opposed bristle holders, bristles mounted in said holders and having an initial free length approximating a fourth of the diameter of said housing, and means slidably mounting said holders in said housing for radial adjustment therealong to locate the outer ends of said bristles at the periphery of said housing.

7. A roughing wheel comprising a disk-shaped housing, opposed arcuate holders having roughing bristles anchored thereto, said bristles having an initial free length approximating a fourth of the diameter of said housing, opposed blocks slidably guided for radial movement along said housing, means attaching said holders to said blocks, and adjusting means for moving said blocks to position the outer ends of said bristles at the periphery of said housing.

8. A roughing wheel comprising a disk-shaped housing having spaced sidewalls, opposed blocks slidably mounted between said sidewalls, each of said blocks having an internally threaded bore, an adjusting screw having oppositely threaded ends respectively screwed into said bores, an adjusting wheel fixed to the medial portion of said screw between said blocks, opposed slots in said sidewalls receiving edge portions of said wheel and confining it against movement radially of said housing, at least one of said slots extending entirely through its sidewall to afford access to said wheel, and roughing bristles carried by each of said blocks and extending outwardly therefrom to the peripheral portion of said housing.

9. In a roughing wheel, the combination comprising a disk-shaped housing, a roughing bristle holder, a block slidable in said housing and carrying said holder, guiding means for limiting said block to radial movement along said housing, a rotatable adjusting screw threaded into said block to move it radially, means for confining said screw against movement radially of said housing, and roughing bristles carried by said holder and extending therefrom to the periphery of said housmg.

10. A roughing wheel comprising a disk-shaped housing including sidewalls spaced by peripheral cylindrical wall sections providing opposed peripheral openings therebetween, opposed blocks slidably mounted between said sidewalls opposite said openings, arcuate metallic holding members having wire roughing bristles anchored thereto, means for clamping said holding members respectively to each of said blocks with their bristles extending outwardly therefrom slightly through said openings, guide means for confining said blocks to radial movement along said housing toward and from said openings, a rotatable adjusting screw having oppositely threaded ends respectively screwed into said blocks, and means for holding said screw against movement radially with respect to said housing.

JOHN FREDERICK SMITH.

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