US1381928A - Machine for skiving shoe-shanks - Google Patents

Description

Pmiiea June 21, 1921.

I I I l ll W VE/V 717E? R. s. MEGATHLIN. v MACHINE FOR SKIVING'SHOE SHANKS.

APPLICATION FILED OCT. 6 I919- RALPH S. MEG-ATHLIN, 0F SQMERVILLE, hIASSAGHUSETTS, ASSIGNOR T6 UNITED SHOE MACHINERY GQRPGHATION, 0E PATEBSON, NEW JERSEY, A.

'IION OF NEW JERSEY.

CORPORA- IVIACI-IINE FOB, SE'QIVING SHGE-SHANKS.

Specification of Letters Patent.

Patented June 21, 1921.

Application filed October 8, 1919. Serial No. 328,782.

1/ o (6 whom it may 0071 corn Be it known that l, RALPH MEGATHLIN, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Machines for Skiving Shoe-Shanks, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the dawings indicating like parts in the several figures.

This invention relates to skiving machines and. is herein illustrated as embodied in a machine having a recessed die roll such as that shown in the patent to Lane No. 1,173,359.

ll ith machines of the type of that of Lane, blanks, such for example as counter blanks, are presented one by one from the bottom of a stack to a pair of rolls one of which has a die cavity of the shape desired to be imparted to the finished counter, the blank being forced into the cavity and then fed past a knife so as to remove that portion of the blank which projects above the cavity. Commonly the blanks are previously died out .10 the contour desired, the purpose of the skiving machine being to bevel them on one or more of their edges. Counter and box toe blanks, owing to their contours, pass readily through the machine. lVhen, however, shoe shank blanks are to be operated upon, certain difiiculties arise. Such blanks are commonly wider near their rear ends than at their forward ends and are fed sidewise through the machine; and when these blanks are stacked in a machine such as that of Lane and fed forward in the usual way, the forward edge of the wider portion is seized first by the bite of the rolls, and the blank is frequently swung angularly in one direction or the other with the result that it is not properly forced into the die cavity, and hence is improperly skived. The swinging of the blank out of its proper angular position may be caused by the action of the rolls, as explained above or it may be caused by the pushing of the feed slide against the edge of the wider portion of the blank; but in either event the same misplacement of the blank with respect to the die cavity occurs. Aside from this difliculty, which is concerned with the lowermost blank of the stack, there is the liabllity that even though the lowermost plank is properly fed, the one above it may pe displaced angularly so that upon the next iorward movement of the feed slide the second blank will be improperly placed and skived.

The general object of the present invention is to provide a machine in which these and similar difficulties may be overcome.

According to one feature of the present invention blanks having wide and narrow portions are advanced to the feed rolls in such manner that the wide and narrow portions are seized substantially simultaneously by the bite of the rolls. in the illustrative machine in which a cutter and a die cavity are provided, the cavity is disposed obliquely with respect both to the edge of the cutter and the bite of the rolls. By making the obliquity such that the forward edges of the two ends of the cavity lie substantially in a line whichis parallel to the axis of the roll, the forward edges of the two ends of a blank placed in the cavity will be seized simultaneously by the bite of tie rolls, and no angular displacement of the blank will occur.

in order to present the blanks properly to the cavity, another feature of the invention comprises a specially constructed hopper for holding the stack of blanks with their axes disposed obliquely with respect to the axes of the rolls, and a feed slide shaped to maintain this obliquity as it advances each blank.

These and other features of the invention, including certain details of construction and combinations of parts, will be described as embodied in an illustrative machine and pointed out in the appended claims.

Referring now to the accompanying drawm s,

*igure 1 is a perspective of a portion of a machine in which the present invention is embodied;

Fig. 2 is a vertical section through a portion of the machine;

Fig. 3 is a horizontal section on a plane which passes between the rolls, and

Fig. 4: is a perspective of a shoe shank which has been skived by the machine.

Before describingin detail the new construction, that which is similar to the machine of the Lane patent will be briefly out lined. The illustrative machine comprises a stationary skiving knife 5, a die roll 7 having two die cavities 6 and 8 "formed therein, and a presser roll. 11 composed of spaced toothed sections. In order to aid the presser roll in forcing the blanks into the cavities as well as to strip the skivings from the presser roll, a series of spring fingers 13 are provided which extend into the spaces between the toothed sections 11. The rolls 7 and 11 are rotated by mechanism, not

shown, which may be the same as in the patent to Lane; and the spidng fingers 13 are mounted for adjustment as in the patent. Located in front of the rolls is a hopper comprising a front wall 15 and end walls 1.7 and 19 which may be supported for adjustment to accommodate blanks oi different shapes and sizes. The blanks are fed one by one from the bottom of the stack by a feed slide 21 which is reciprocated beneath a table 23 in timedrelation with the rotation of the rolls. The blanks are stacked with their iorward edges in Contact with the front wall 15, their ends in contact with the end walls 17, 19, and the bottom blank resting upon a bed plate 20, the table 23 being adjusted so that its thick forward edge engages the rear edges of several of the lowermost blanks. The feed slide is reciprocated between the table 23 and the bed plate 520, and the front wall 15 is cut away at its lower end to permit the slide to feed the lowermost blank to the rolls.

The general organization which has been thus briefly outlined is or may be substantially the same as that of the patented machine and will not be described further in detail. It will be understood, however, that the blanks are stacked in the hopper while the machine is at rest and that the 1 *ther operation of the machine is automatic. it should perhaps be explained that only one of the die cavities is used with a given stack oi blanks, the other being adjusted circumierentially of the axis of: the roll into operative position when the blanks of another stack are of a different size or shape. in the operation of the machine the blanks ari ed one by one from the bottom of the stack to the selected die cavity andv are advanced by the rolls to the knife the edge of which is parallel to the axes of the rolls and operates to skive oii the projecting portions 01" the blank.

When blanks such as those oi shoe shanks, which are wider near one end than at the other, are stacked in the Lane machine, each blank contactswith the i'ront wall 15 at one locality only namely at the wider portion near one end of the blank, the longitudinal axis of the blank, as well as that of the cavity, being substantially parallel to the plane of the wall 15 and to the bite of the rolls. WVith this construction a blank which has been properly delivered to the cavity, is seized first at the wider portion by the bite or the rolls and is frequently displaced angularly so as to be improperly skived. A further cause of diiiiculty lies in the fact that each blank, as it lies in the hopper, is in contact only at its wider portion with the front wall 15, the narrower end being spaced from said wall. 'When, therefore, the lowermost blank is pushed forward by the feed slide, this blank exerts a drag upon the blank above it which tends to swing the narrower end forward; and when the feed slide is withdrawn a second drag is exerted upon the last-named blank in the opposite direction. The final position of this blank is thus uncertain; and at the next forward movement of the feed slide this blank is thus liable to be delivered partly into and partly out of the die cavity. The general object of the present invention is to prevent such occurrences as those referred to above. Referring now more particularly to Figs. and 4, there has been selected for purposes of explanation, a straight shank blank 100 which, after being skived, results in a finished shank, the "torn er being shown in Fig. 8 and the latter in Jig. 4. The diedout blanks, which are wider near their rear ends than at their front, are stacked in the i achine, as shown in Figs. 1 and 3, with their forward edges resting at two points, onenear one end and one near the other, against the front wall 15 of the hopper, said front wall, it being noted, being substantially parallel to the axes and consequently to the bite of the rolls 7 and 11. The ends of the blanks are engaged by the adjustable end walls 17, 19; and the rearmost points of the blanks, which are located at their wider portions, are engaged by the forward edge of the table 23. it no further provision were made, the left-hand end of the blanks, as viewed in Figs. 1 and 3, would be tree to be moved forward and back because of the space between said ends and the forward edge of the table 23. in order to hold the lett-hand ends of the blanks from move ment, there is provided a member in the form of a bar 25 which engages the rear edges of the blanks at these ends and is adju'stably fastened at top and bottom by screw-bolts 27, which pass through slots 29 in the bar and are threaded into the end wall 19. @nly the lower bolt and slot have been shown, the upper bolt and slot being identical with them. The feed slide 21 has a forward operative edge 111 which corresponds in outline to that of the rear edges of the blanks, so that the obliquity of the blanks is maintained as each blank is fed forward to the rolls.

The bite of the rolls is indicated in Fig. 3 by the dot-and-dash line AA, the die cavities being disposed with their longitudinal each revolution oi" the roll.

axes oblique to this line and with the two foremost points or the front edge of each lying substantially in this line once during l hen, therefore, the lowermost blank has been fed forward ano delivered to the cc vity by the feed slide 21, the rolls grip the blank simultaneously at two points, one at the left-hand end and one at the wider portion near the rig hand end oi the blank, and draw it steadily forward without the liability of angular displacement of the blank which has previously occurred when such a blank was gripped first at the wider portion. ,With regard to the proper presentation of the blanks to the die cavity, this presentation is insured by holding the blanks in the stack with their axes obliquely disposed to the bite of the rolls and by providing a feed slide shaped to maintain the obliquity of each blank as it is fed forward.

In the illustrative machine, the wider por- Lions of the blanks are shown as engaged by the usual table 28, but it is obvious that whether the engagement is by this table or by a second member like the member 25 but fastened to the right-hand end wall 1'? or by some other suitable member is immaterial so far as thepresentation of the blanks is concerned. in order to simplify thee planation or the invention, a straight shank blank has been chosen for illustration, but it should be understood that the invention is equally applicable to blanks of other shapes, such, for example, as those of right and left shanks and in general to any blank which is liable to be displaced angularly with respect to the direction in which it is fed.

Although the invention has been set forth as embodied in a particular machine, it should be understood that the invention is not limited in the scope of its application to the oarticular machine which has been shown and described.

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

1. A machine of the class described, having in combination, a die member having a cavity therein, a cutter constructed and arranged. to remove from blank, a portion of which is forced into the cavity, that portion which. extends above the cavity, and presser cooperating with the cavity to hold the blank during the cutting operation, the die cavity having its longitudinal axis obliquely disposed with respect to the line of the edge or the cutter during the entire cutting operation.

2. A machine of the class described, having in combination, a cutter, a die member having a die cavity therein, a presser cooperating with the die member to force a blank into the cavity, the die cavity being obliquely disposed with. respect to the line of the cutting edge or" the cutter, and means for delivering to the presser a blank having its longitudinal axis obliquely disposed with respcc to the line of the cutting edge of the cutter.

A machine of the class described, having in combination, a cutter, a' die roll having a die cavity therein, and a presser roll cooperating with the die roll to fOI'CB a blank into the cavity and to advance it to the cutter, the longitudinal axis of the die cavity being oblique to the axis of the die roll.

i. A machine of the class described, having in combination, a cutter, a die roll having a die cavity therein, a presser roll cooperating with the die roll to force a blank into the cavity and to advance it'to the cutter, the longitudinal axis of the die cavity being oblique to the axis or the die roll, and means for delivering to the cavity a blank having its longitudinal axis obliquely disposed with respect to the line of the cutting edge of the cutter.

5. A machine for skiving shank blanks, having in combination, a skiving knife, a die roll having die cavity therein, and a presser roll coiiperating therewith, the die cavity extending lengthwise or the die roll and having its longitudinal axis oblique to the axis of rotation of the roll.

6. A machine of the class describechhaving in combination, a cutter, a die roll having a die cavity therein with its longitudinal axis disposed obliquely with respect to the axis of rotation of the roll, a presser roll, means constructed and arranged to hold a blank with its longitudinal axis disposed obliquely with respect to the axeso'f the rolls, and a feed slide having its blank-engaging ."face shaped to maintain the obliquity of the blank as it advances the blank to the rolls.

7. A machine of the class described, hav ing in combination, a cutter, a die roll having a die cavity therein having longitudinal axis disposed obliquely with respect to he axis of rotation of the roll, a presser roll, means constructed and arranged to hold a stack of blanks with their longitudinal axes disposed obliquely with respect to the axes of the rolls, and a feed slide having its blank-engaging face shaped to maintain the obliquity of the blanks as it advances them one by one to the rolls.

8. A machine for operating upon a blank having two portions which extend unequal distances from the longitudinal axis of the blank in the direction in which the blank is to be fed, having in combination, a cutter, a rotary die roll having a die cavity therein, and a rotary presser roll cooperating with the die roll to force the blank into the cavity and to advance it to the cutter, the die cavity having two portions corresponding to the two portions of the blank and being so located that the forward edges of the two portions with respect to the direction of rotation of the die roll lie substantially in a line which is parallel to the axis of the roll.

9. A machine for operating upon a blank, having two portions which extend unequal distances from the longitudinal axis of the blank in the direction in which the blank is to be fed, having in combination, a cutter, a rotary die roll having a die cavity therein, a rotary presser roll cooperating with the die roll to force the blank into the cavity and to advanve it to the cutter, the die cavity having two portions corresponding to the two portions of the blank and being so located that the forward edges of the two portions with respect to thedirection of rotation of the die roll lie substantially in a line which is parallel to the axis of the roll, and means for delivering a blank to the cavity.

10. A machine for operating upon a blank having two portions which extend unequal distances from the axis of the blank in the direction in which the blank is to be fed, having in combination, a cutter, a rotary die roll having a die'cavity therein, and a rotary presser roll cooperating with the die roll to force the blank into the cavity and to advance it to the cutter, the die cavity having two portions corresponding to the two portions'of the blank and being so located that the forward edges of the two portions of the blank are caught simultaneously by the bite of the rolls. 7

11. A machine of the class described, having in combination, a cutter, a die roll having a die cavity therein having its longitudinal axis disposed obliquely with respect to the axis of rotation of the roll, a presser roll, a hopper for holding a stack of blanks each having one portion wider than another with their longitudinal axes obliquely disposed with respect to the bite of the rolls, said hopper comprising a front wall, end walls and a member for engaging the blanks at their narrower ends at the rear side to hold said narrower ends again the front wall, and means for feeding the blanks one by one to the rolls.

12. A. hopper for holding blanks which have wider and narrower portions, having in members for engaging the rear edges of the blanks at localities substantially opposite those engaged by the front wall.

13. A machine of the class described, having in combination, skiving mechanism for operating upon blanks having portions which are respectively wide and narrow, a hopper having means for engaging the ends of the blanks, means for engaging the blanks on opposite sides at their wide and narrow portions, and means for feeding the blanks one by one to the skiving mechanism.

1%. A machine for operating upon a blank, having wide and narrow portions, having in combination, an operating tool, a pair of rolls for feeding the blank to the tool, and means for advancing the blank to the rolls in such manner that it is seized substantially simultaneously by the bite of the rolls at its wide and narrow portions.

15. A machine for operating upon a blank having wide and narrow portions, having in combination, an operating tool, a pair of rolls for feeding the blank to the tool, and means for advancing the blank obliquely to the rolls to cause the forward edges of the wide and narrow portions to lie during the feeding movement in a line parallel to the bite of the rolls.

16. A machine of the class described, hav- 7 RALPH S. MEGATHLIN,

Images