US2125931A - Trimming machine - Google Patents

Description

' Aug. 9, 1938.

J. T. LANCASTER TRIMMING MACHINE Filed March 9, 1936 2 Sheets-Sheet 1 g- 1933- J. T. LANCAS'i'ER 2,125,931

TRIMMING MACHINE Filed March 9, 1936 2 Sheets-Sheet 2 Patented Aug. 9, 1938 TRIMMING MACHINE John T. Lancaster, Newton, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application Marthe, 1936, Serial No. 67,847

31 Claims.

This invention relates to trimming machines and more particularly to machines for operating on partially pulled-over or lasted shoes to prepare their toe ends for cement lasting. More specifically, the invention is concerned with the problem of severing a strip from the lining at the toe of a shoe, to the end that the pleats, when the toe is subsequently lasted, may not be too bulky and the margin of the upper may lie in contact with the insole instead of being separated therefrom by the lining. For the purpose of describing the invention, the term lining will be used to include, for the sake of brevity, such other elements as may be provided to reinforce it, for example, a-toe-box or stiffener and a doubler. These usually lie between the upper and the lining proper and in many shoes they are secured to the latter by adhesive substance, by stitches or both.

According to one common method. of making shoes, a pulled-over shoe or one that has been side-lastedis set up in a bed-lasting machine by which its ends are to be lasted. At this stage, if the toe is to be lasted with cement, it has developed upon the bed-lasting operator to fold back the toe of the upper and thus unmask the projecting margin of the lining and to cut off a strip of the lining flush with or close to the insole, beginning at or near the tip line on one side, progressing around the toe, and finishing at or near the tip line on the other side. It has been the practice to cut off this strip of lining with a knife held in the hand, but when the lining is trimmed in this manner it retards the output of the bedlasting machine, takes the time of a high-price workman and wrinkles or creases the outer surface of the upper where the latter is folded.

To overcome these objectionable conditions, the present invention provides an improved machine with which to cut off the surplus unlasted portion of the lining without wrinkling the upper and without retarding the work of the bed-lasting ma chine.

As herein illustrated, a feature of the invention consists in a trimming machine comprising two shearing members one of which is formed and arranged to project between inner and outer layers of unlasted upper materials loosely enveloping the toe end of the insole of a partially fabricated shoe on a last, and the otherof which isarranged to cooperate therewith to sever a marginal strip of the inner layer close to the insole, and powerdriven means for operating one of the shearing members. Preferably, the member that projects between the layers is arranged to rotate and is driven to feed the work.. Moreover, as herein shown, the other shearing member is a small rotary disk the perimeter of which is preferably provided with teeth thatoperate with a shearing action without tearing or shredding the work. To guide a partially fabricated shoe the machine is provided with an improved trimming guide having a lip formed and arranged to project between the inner layer and the perimeter of the insole. In addition to the features above mentioned, the illustrated machine is provided with other novel and useful features by which the feeding of the Work and the severing of the lining are expedited. Referring to the accompanying drawings, Fig. 1 is a left side elevation of the upper portion of a machine embodying the invention, the

toe portion of a pulled-over or partially lasted shoe being represented in section and a free margin of the lining being in process of being trimmed; i

Fig. 2 is a View similar to Fig. l, but on a larger scale, of the machine elements adjacent to the trimming locality;

Fig. 3 is a top-plan view and partial section of the structure intersected by line IIIIII of Fig. 2;

Fig. 4 is a horizontal section in the plane of line IV-IV of Fig. 2;

Fig. 5 is a front elevation of the trimming gage assembly; and

Fig. 6 is a bottom View of the forepart of a partially lasted shoe of common construction that requires the free margin of the lining to be severed before the upper is lasted at the toe. Referring first to the structure of the shoe as represented in Figs. 1 and 6, the upper H] and lining II conforming to a last l3, are permanently secured to the insole H with lasting staples l4.

It is to be understood that the lining may also 7 include a stiff toe-box and a doubler I5, both of which lie between the upper l0 and the lining proper, the doubler being between the upper and the toe-box. To avoid confusion in the drawings, no attempt has been made in Fig. 1 to represent the toe-box or the doubler individually, since they may be regarded as component parts of the lining. In Fig. 6, however, the doubler I5 is repreper at the toe, and to permit the pleated margin of the upper to lie in contact with the insole instead of being separated therefrom by the lining, to the end that the bond of adhesion between the upper and the insole may be satisfactory. Accordingly, the present invention provides a machine for severing the surplus strip of unlasted lining before such a shoe is set up in a bed-lasting machine. If a toe-tack has previously been driven as indicated by a tack-hole at I! in Fig. 6, it will be pulled out to free the pulled-over margins of the upper and the lining from the insole and from each other.

The trimming machine shown herein is provided with a small fiat disk cutter 20 arranged to operate in confronting relation to the insole of a shoe. The cutter is preferably provided with peripheral teeth arranged to operate in shearing relation to a shearing edge 2| formed on a rotary spindle 22 in consequence of forming a peripheral groove 23 in the spindle near its lower end. Below the shearing edge 2| the spindle is tapered abruptly to provide a cone-shaped head or extremity 24 adapted to project between the free margins of the upper and the lining and to deflect the margin of the upper away from that of the lining. As represented in Fig. 4, the cutter 20 has the appearance of a circular saw, but its direction of rotation is such as to cause its inclined edges rather than its radial edges to operate with cutting effect, since the inclined edges are better adapted to operate with a shearing out without shredding the material to be severed and without feeding the work too rapidly or with too much force.

The cutter 20 is affixed to the lower end of an extension 25 of a shaft 26, the extension 25 being bored and tapped to receive an attaching screw 21 having a left-hand thread which, by reason of the direction of rotation of the shaft 26, has a tendency to tighten the cutter when in operation.

The extension 25 also carries a freely rotatable roll or sleeve 28 supported thereon by the cutter 20. This roll is arranged in cooperative relation to a grooved or knurled peripheral surface 29 on the spindle 22, the latter being driven at a slow speed to feed the, work by its engagement with the margin being severed, and the roll 28 serving to pinch the margin sufliciently to insure a feeding effect of the spindle.

The shaft 26 is arranged to rotate about a vertical axis in a bearing 38 provided by a head or frame 3|. Any preferred means may be provided to drive the shaft 26. As herein shown, the shaft is provided with a pulley 32 to which rotation is transmitted from the driving pulley 33 of an electric motor 34 by a belt 35 that runs over idle pulleys, one of which is indicated at 36. With considerable latitude in regard to the relative diameters of the pulleys 32 and 33 the cutter 20 may be driven at various speeds from about 800 R. P. M. to about 2000 R. P. M.

The organization herein shown provides for driving the spindle 22 at slow speed with rotation derived from the shaft 26. For this purpose, the shaft is provided with a circular eccentric cam 40, each complete rotation of which turns a ratchet wheel 4| a distance corresponding to the length of one tooth of the ratchet. This ratchet-wheel is affixed to a countershaft 42 by which rotation is transmitted to the spindle 22 by pinions 43 and 44. The ratchet-wheel receives its motion from an operating pawl 45 carried by a rocker 46 arranged to oscillate on the shaft 42 which serves as a fulcrum. The rocker also carries an anti-friction roll 41 that runs on the periphery of the eccentric 40 and is maintained in contact with the eccentric by'a leaf-spring 48 (Figs. 1 and 3) arranged to act on the rocker 46 at the opposite of its fulcrum 42. A stem 49 rigidly related to the pawl 45 is arranged to turn in a bearing formed in the rocker 46 and is retained therein by a short length of spring wire 5|] that serves not only as a keeper but also as a spring to maintain the. pawl in contact with the ratchet-wheel. One end of this wire is inserted through a hole in the stem 49 and the other end is formed to engage and partially surround the counter-shaft 42.

The assemblage comprising the work-feeding spindle 22 and the above-described parts for communicating rotation to it from the eccentric 40 also includes a two-part housing comprising cooperative bearing members 5| and 52 rigidly connected by screws 53. This assemblage is movable intact toward and from the shaft 26, to the end that the margin of the lining may be readily inserted between the spindle 22 and the cutter 20 when the assemblage is retracted. For this purpose, the bearing member 52 is arranged to slide in a horizontal bearing provided by a grooved cap 55 secured to the frame 3| by bolts 56. A pin 51 affixed to the slide 52 projects laterally through and beyond an opening 58 in the cap to form connection with a link 59. The other end of this link is pivotally connected to one arm of a bellcrank lever 66, the fulcrum of which is indicated at 6|. The other arm of the bell-crank lever carries an adjustable stop-screw 62 and is connected to the upper end of a rod 63 that extends downwardly to a treadle (not shown) mounted at the base of a column 64 on which the head 3| is mounted. A compression spring 65 surrounding the rod 63 normally maintains the work-feeding spindle 22 in its operative position shown in Figs. 1, 2 and 4, the lower end of the spring being seated upon a stationary abutment 66. A boss 61 projects from the frame 3| into the path of the stop-screw 62 to limit the extent of retraction of the slide 52.

The machine is also provided with a trimming guide (Figs. 2 and 5) comprising a plate 19 of sheet metal to which a cylindrical shank or stem H is rigidly secured by a rivet 12. A holder '13 is provided with a socket in which the stem is arranged, and the socket portion thereof is divided by a kerf 14 and provided with a clamping screw 15 by which it may be contracted to grip the stem. Two holes 16 are bored through the holder 13 to receive screws 11 by which the holder is secured to the frame 3|. the plate 10 is bent to underlie the cutter 20 and its attaching screw 21, and the extremity of this portion of the plate is bent down to form a lip 18 arranged to project between the lining and the perimeter of an insole l2 as shown in Fig. 1. The lip 18 is thus arranged to guide a shoe by contact with the perimeter of the insole while the horizontal portion of the gage lies on the face of the insole to maintain the shoe at a level slightly below the level of the cutter.

Assuming that the described machine is to be used to out off a strip of all the lining materials at the toe end of a shoe in the condition represented in Figs. 1 and 6, the operator will first depress the treadle to retract the feeding spindle 22 from the cutter 29 and will then present the shoe to the trimming gage in a position that will enable the conical head 24 of the spindle to enter between the inturned margin of the upper and the lining materials at the point indicated at a The lower portion of in Fig. 6. At first the operator may support the toe of the shoe in the right hand and the heel end in the left hand. If necessary, the operator may first bend the margin of theupper away from the lining materials far enough to enable the point of the conicalhead 24 to enter between the upper and the doubler, after which'the conical head will wedgethese elements apart and maintain a suitable spacebetween them. As the shoe is raised to the trimming gage the materials to be severed will be guided upwardly by the conical head 24 so thattheywill lie'between the feeding portion 29 of the spindle and the freely rotatable sleeve of roll 28. When the operators foot is removed from the treadle the spring 65 will return the feeding mechanism to its operative position where the spindle 22 and the roll 28 will grip the materials to be severed. Meanwhile the cutter 20 will have begun to operate on the interposed materials to sever them with a shearing cut.

At first, because the trimming must be begun inside the boundary of the-insole, the lip 18 of the trimming gage will bear on the face of the insole, but sincethe trimming will immediately progress across the perimeter of the insole the shoe will be moved to a position that will enable the perimeter to lie in the angle formed by the lip 18 and the horizontal portion of the gage, as shown in Fig. 1. As the trimming progresses beyond this stage the operator will swing the heel-end of the shoe toward him and to the right, the toe-end of the shoe being fed meanwhile by the materials being severed, but when the heelend of the shoe projects to the right from the point of operation, and before the out has progressed to its terminal point indicated at b in Fig. 6, the operator will rock the shoe on the shoulder 19 of the trimming gage andthereby depress the margin of the sole below the level of the lip 18. control of the lip 18 and the marginof the sole may pass under the lip to permit the cut to run out at or near the point 1).

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

1. A trimming machine comprising two shearing members and power-driven means for operating one of them to sever a marginal strip from an inner layer of unlasted upper materials loosely enveloping the toe of the insole of a partially fabricated shoe on a last, one of said shearing members being formed and arrangedto project between said inner layer and a confronting outer layer intersecting the shearing plane of said members. 2. A trimming machine comprising two shearing members one of which is formed and arranged to project between free margins of the upper and the lining loosely enveloping the toe of the insole of a partially fabricated shoe on a last, and the other of which is arranged to cooperate therewith to sever a stripof the lining close to the insole, power-driven means for operating one of said members, and a trimming guide arranged to project between the lining and the perimeter of the insole.

3. A trimming machine comprising a shearing member formed and arranged to project between free margins of the lining and the upper loosely enveloping the toe of the insole of a partially fabricated shoe on a last, power-driven means for operating said member, shearing means arranged to cooperate with said member to sever a strip The shoe is thus released from the said member to sever a marginal strip from said inner layer in a plane intersecting said outer layer without cutting said outer layer.

5. A trimming machine comprising a rotary driven spindle one end of which is formed and arranged to project between free margins of the upper and the lining loosely enveloping the toe end of the insole of a partially fabricated shoe on a last, and a power-operated cutter arranged to cooperate with said spindle to sever a strip of the lining close to the insole.

6. A trimming machine comprising a rotary driven spindle one end of which is formed and arranged to project between free margins of the upper and the lining loosely enveloping the toe end of the insole of a partially fabricated shoe on a last, a power-operated cutter arranged to operate against said spindle to sever a strip of the lining close to the insole, and a freely rotatable roll arranged to cooperate with said spindle to grip and feed the materials being severed.

7. A trimming machine comprising a rotary driven spindle one end of which is formed and arranged to project between free margins of the upper and the lining loosely enveloping the toe end of the insole of a partially fabricated shoe on a last, said spindle having a peripheral groove bounded by a shearing edge, and a rotary powerdriven disk cutter arranged to confront the insole and cooperate with said shearing edge to sever a strip of the lining with a shearing out close to the insole.

8. A trimming machine comprising a poweroperated cutter formed and arranged to operate against the inner face of a free margin of lining at one end of a partially fabricated shoe on a 1 last to sever a strip from the lining, and a member formed and arranged to project between said margin and the upper to brace the lining against said cutter at both sides of the line of cut and to deflect the upper from the cutter, said member having an edge in shearing relation to said cutter.

9. A trimming machine comprising a rotary disk cutter formed and arranged to confront the insole of a partially fabricated shoe and sever a strip" from a free margin of unlasted lining thereof, and a member arranged to project between said marginand' the upper outside the perimeter of the insole to maintain the unlasted margin of the upper away from the cutter and to brace said margin of the lining against the cutter.

10. A trimming machine comprising a rotary disk cutter formed and arranged to confront the insole of a partially fabricated shoe and sever a strip from a free margin of unlasted lining thereof, and a rotary driven member arranged to project between said margin and the upper outside the perimeter of the insole to maintain the unlasted margin of the upper away from said cutter and to cooperate therewith to sever said margin of the lining.

11. A trimming machine comprising a rotary driven shaft, a cutter and a cam both fixed to said shaft and a freely rotatable roll mounted thereon, a feed-roll arranged to cooperate with said freely rotatable roll to grip the work, a portion of said feed-roll being arranged to brace the work againstsaid cutter, and means arranged to be operated by said cam to drive said feed-roll step by step.

12. A trimming machine comprising a rotary driven unit including a cutter and a cam, a supporting member movable toward and from said unit, a feed-roll and a freely rotatable roll carried respectively by said supporting member and said driven unit to grip the work, and a ratchet and-pawl couple carried by said supporting member to drive said feed-roll, the pawl of said couple being arranged to be operated by said cam.

13. A trimming machine comprising a rotary driven unit including a cutter and a cam, a freely rotatableroll mounted on said unit in coaxial relation thereto, a cooperative unit including a feed-roll, a toothed wheel for driving it, and a pawl mechanism for driving said wheel, said feed-roll and said freely rotatable roll being cooperatively related to grip the work, and said pawl mechanism being arranged to be operated by said cam, and manually operable means by which one of said units may be shifted relatively to the other to vary the space between said rolls.

14. A trimming machine comprising a rotary driven unit including a shearing cutter and a cam, a supporting member movable toward and from said unit, a rotatable member carried by saidsupporting member and having a shearing edge arranged to cooperate with said cutter, and a ratchet-and-pawl couple carried by said supporting member to drive said rotatable member, the pawl of said couple being arranged to be operated by said cam.

15. A trimming machine comprising a rotary driven shaft, a disk cutter secured against one end thereof, a freely rotatable roll surrounding said shaft adjacent to said cutter, a rotary workfeeding spindle arranged to cooperate with said roll and having a shearing edge arranged to cooperate with said cutter, movable means in which said spindle is journaled and by which it may be shifted laterally toward and from cooperative relationship with said roll and said cutter, and means arranged to drive said spindle.

16. A trimming machine comprising a rotary driven shaft, 9. disk cutter secured against one end thereof, a freely rotatable roll surrounding said shaft adjacent to said cutter, a rotary workfeeding spindle arranged to cooperate with said roll and having a shearing edge arranged to cooperate with said cutter, a movable carrier by which said spindle may be shifted laterally toward and from cooperative relationship with said roll and said cutter, an actuator carried by said shaft, and transmission mechanism carried by said carrier and operable by said actuator to drive said spindle at reduced speed.

1'7. A trimming machine comprising a rotary driven shaft, a disk cutter secured against one end thereof, a freely rotatable roll surrounding said shaft adjacent to said cutter, a rotary workfeeding spindle arranged to cooperate with said roll and having a shearing edge arranged to cooperate with said cutter, a movable carrier by which said spindle may .be shifted toward and from cooperative relationship with said roll and said cutter, a cam carried by said shaft, and mechanism carried bysaid carrier to drive said spindle intermittently with motion derived from said cam.

18. A trimming machine comprising cooperative rolls arranged to grip a free margin of unlasted lining projecting from the toe of a partially fabricatedshoe, one of said rolls being formed and arranged to project axially between said margin and the corresponding unlasted margin of the upper to wedge them apart, means arranged to drive one of said rolls, and cutting means arranged to sever a strip from said margin of the lining.

19. A trimming machine comprising cooperative rolls arranged to grip a free margin of unlasted lining projecting from the toe of a partially fabricated shoe, one of said rolls having a tapering end formed and arranged to project between said margin and the corresponding unlasted margin of the upper, means arranged to drive one of said rolls, and cutting means arranged to sever a strip from said margin of the lining.

20. A trimming machine comprising cooperative rolls arranged to grip a free margin of lining projecting from the toe of a partially fabricated shoe, one of said rolls being formed and arranged to project axially, and having a peripheral groove arranged to lie between said margin and the upper, means arranged to drive the roll having said groove, and a cutter arranged to project into said groove to sever a strip from said margin.

21. A trimming machine comprising cooperative rolls arranged to grip a free margin of lining projecting from the toe of a partially fabricated shoe, one of said rolls being formed and arranged to project, and having a peripheral edge arranged to lie, between said margin and the upper, means arranged to drive the roll having said edge, and a cutter arranged to cooperate with said edge to sever a strip from said margin with a shearing cut.

22. A trimming'machine comprising a rotary w,

spindle formed and arranged to project between the upper and a free margin of lining at the toe of a partially fabricated shoe, a rotary driven shaft, a cutter affixed to said shaft and arranged to cooperate with said spindle to sever a strip from said margin of the lining, a freely rotatable roll mounted on said shaft and arranged to cooperate with said spindle to grip said strip of the lining, and means by which said spindle is driven with less speed than said shaft.

23. A trimming machine comprising cooperative rolls arranged to grip a free margin of lining loosely enveloping the toe of the insole of a partially fabricated shoe, one of said rolls being formed and arranged to project between said margin and the upper and one of them being bodily movable away from the other to facilitate inserting said margin between them, means arranged to drive one of said rolls, and cutting means arranged to sever a strip from said margin.

24. A trimming machine comprising a trimming gage formed and arranged to engage the margin and the perimeter of the insole of a partially fabricated shoe having free margins of upper and lining, cutting means arranged to sever a strip from said margin of the lining. and means arranged to maintain the upper out of the range, and the lining in the range, of said cutting means.

25. A trimming machine comprising a trimming gage having a thin fiat portion formed and arranged to lie in face-to-face contact with the margin of the insole of a partially frabricated shoe, and having a lip projecting from one edge of said portion to run between the perimeter of the insole and a free margin of lining loosely enveloping an end of the insole, cutting means arranged to sever a strip from said margin adjacent to the junction of said flat portion and said lip, and means arranged to project between said margin and the corresponding margin of the upper to maintain the latter out of the range of said cutting means and to brace the margin of the lining against the cutting means.

26. A trimming machine comprising a trimming gage arranged to be engaged by the margin of the insole of a partially fabricated shoe having unlasted marginal portions of inner and outer layers of upper materials projecting loosely beyond the insole, a cutter arranged to cut through the unlasted marginal portion of said inner layer from its inner surface to its outer surface, power-driven means for operating said cutter, and a member arranged toengage constantly the outer surface of said unlasted portion of the inner layer to brace said portion against said cutter and to fend the outer layer away from it.

27. A trimming machine comprising the combination of elements defined in claim 26, and rotary driven means arranged to feed the work by engagement with the margin of said inner layer.

28. A trimming machine comprising a fixed trimming gage having a thin flat portion ar ranged to be engaged by the margin of the toeend of the insole of a partially fabricated shoe having unlasted portions of inner and outer layers of upper materials loosely enveloping that end of the insole, a pair of rotary cutting members cooperatively arranged to sever a strip from said inner layer with a shearing cut close to said thin fiat portion, means arranged to deflect said outer layer from. the shearing locality, and power-driven means for operating said cutting members.

29. A trimming machine comprising power-operated cutting means arranged to sever progressively the unlasted lasting allowance of an inner layer of upper materials loosely enveloping the toe of a last, power-driven means arranged to feed the Work, and means arranged to separate an outer layer of said upper materials from said inner layer and thereafter maintain said outer layer out of the range of said cutting means.

30. A trimming machine comprising poweroperated cutting means arranged to sever progressively the unlasted lasting allowance of an inner layer of upper materials loosely enveloping the toe of a last, means arranged to be engaged by the margin of an insole on the last to control the course of such severing, and means arranged to maintain an outer layer of said upper materials out of the range of said cutting means.

31. A trimming machine comprising poweroperated cutting meansarranged to sever progressively the unlasted lasting allowance of an inner layer of upper materials loosely enveloping the toe of a last, and means arranged to separate an outer layer of said upper materials from said inner layer and thereafter maintain said outer layer out of the range of said cutting means.

JOHN T. LANCASTER.

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