US2103260A - Welt-treating machine - Google Patents

Description

Dec. 28, 1937. c E. HOOD WELTYTREATING MACHINE Filed April 18, 1936 Patented Dec. 28, 1937 WELT-TREATING MACHINE I I Charles E. Hood, Lynn, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J. a corporation of New Jersey Application April 18, 1936, Serial No. 75,061

1:; 13 Claims.

' This invention relates to machines for operating on the uppers of prewelt shoes and. is herein illustrated as embodied in a machine for straightening the welt and applying a coating of cement to the attaching surface of the welt.

In the manufacture of prewelt shoes, it is customary to sew a, welt to the lower margin of the substantially completed upper before the lasting operation. After the sewing operation,,the welt lies alongside substantially in contact with the outer surface of the upper. The process of placing a last in the welted upper, lasting the shoe, thereby flattening the welt to bring the attaching face'of thewelt out ready for contact with an outsole, and the attaching of the outsole to the welt temporarily by means of cement prior to stitching-it thereto, is greatly facilitated if the welt isstraightened or caused to stand away from the upper. Such a'straightening operation enables the weltto be readily positioned against the substantially flat upper surface of the wipers -of=- a bed-lasting machine, for example. The "straightening operation involves'the stretching of the outer margin of the welt and the'compressing of the inner margin thereof, especially around the toe and heel ends of the shoe, thereby still further facilitating the flattening of the welt and the attachment of the outsole thereto.

One object of my invention is to facilitate this no welt-straightening operation in unlasted, prewelt shoe uppers.

*A feature of the invention resides in a novel machine designed to progressively engage the rmargin of .a welted upper, gripping one of the stitched-together parts and spreading the other part away from it as the margin is progressively treated'.-- In the illustrated machine, coacting feedrolls are arranged to grip the opposite faces of the welt and means are provided for pressing B the upper away from the welt, these means comprising a member having a surface for engagement with the shoe upper and positioned to form ',-.an obtuse angle with the work-gripping portion of the adjacent roll. Preferably and as shown, one of the rolls has a cylindrcal portion and an adjacent frusto-conical portion which forces the upper .away from the welt.

In accordance with another feature of the intag .vention, one of the welt-gripping rolls may be conveniently utilized for applying a coating of cement to the attaching surface of the welt. In ethe illustrated machine, the'upper of the two welt-gripping rolls is used as the coating roll and cement is supplied to this upper roll at a point remote from the pointer engagement with the work by means of a series of rolls, one of which dips in a trough containing cement.

In order to facilitate the guiding of the workand in accordance with still another feature of the invention, a novel arrangement of gages is provided, one of which contacts with the outer periphery of the welt and the other of which contacts with the inner periphery. As illustrated, this latter gage overhangs the welt and is curved to guide the incoming inner margin of the welt and to hold the outer periphery of the welt in engagement with the other gage. The presentation of a piece of work to the machine is still further facilitated by mounting one of the gages on a tiltable arm which,

supports the lower roll, the other gage being mounted in predetermined relation to the-cement-applying roll. With this arrangement, the work may be positioned on the lower roll with the edge of its welt'against the gage mounted on this tiltable arm, whereupon the latter may be raised to grip the welt against the upper roll, its inner edge then being in contact with'the other gage.

These and other features of the invention are 25 described in the following specification and shown in the accompanying drawing, in which 9 Fig. 1 is a front elevation with parts in section, of the work-engaging elements of the machine;

Fig. 2 is an angular view of a fragment of the machine showing a piece of work gripped by the coacting rolls; l r Fig. 3 is an end elevation of the coacting rolls and the edge gages, and

Fig. 4.- is a fragmentary view showing the rolls 35 in separatedposition with a piece of work presented in contact with one edge gage.

The machine to be described is particularly adapted for use with so-called .prewelt shoe uppers, as shown at [0, such as isemployed extensively in the making of infants shoes. After such uppers are substantially completed, aiwelt I2 is stitched around the lower marginqof the upper with one edge of the welt flush with the edge of the upper. The grain surface of the welt is commonly placed against the grain surface of the upper and the welt lies substantially fiat against it. Cement is applied to the attaching or flesh surface I4 of the welt which, when the upper is lasted, is brought into the plane of the attachaing surface of the sole. The sole is then temporarily secured by means of cement to the welt of the lasted upper, after which the outsole is permanently, attached to the welt, as by stitching.

The invention is herein illustrated as embo'diedwi in a machine of the type shown in Letters Patent of the United States No. 1,851,162, granted March 29, 1932 on an application of J. W. Cosgrove and, as in that machine, a driven, knurled roll 20 is secured to a shaft 22 journaled in the frame 24 of the machine. Coacting with this roll is a worksupporting roll 26 mounted on a driven shaft 28 which is journaled in a tiltable arm 30, pivoted on a pin 3| in the frame of the machine, the arm being normally urged upwardly byaspring 32 to a position determined by a stop 34 which may be adjusted by means of a hand wheel 36. The Welt I2 is gripped between the cylindrical, peripheral surfaces of these two rolls to feed the work progressively through the machine. During that action,- the welt is straight ened by pushing the upper l0 away from the welt by means of a frusto-conical-portion on the roll 26. This portion 40 engages the outside surface of the upper and is so formed that its workcontacting surface makesan obtuse angle with the work-contacting portion of the periphery of the supporting roll 26.

The application of cement to the flesh surface l4 of the welt is effected by the knurled upper roll 20 which is supplied with cement through a series of driven rolls 42 and 44, the latter of which dips in the cement in a'trough 46. Th e,quantity of cement carried over to the applying roll 20 is determined by a doctor roll (not shown). The position of the doctor roll may be controlled by a thumb screw 48. i I

The position of the supporting roll26 laterally with respect to the applying roll 20 may be adjusted by means of a plate having aforked end 52 (Fig. 3) and which is adjustably held in position on the arm 30 by means of a clamp screw 54. In view of the relation of the upper ID to the welt l2, the intersectionof the conical and cylindricalsurfacesof the supporting roll commonly lies opposite a mid portion of the knurled surface of the applying roll'20 so that the whole width of the welt may be applied thereto.. g 7

To guide the welt into the proper relation to the cement-applying roll 2|], gagesfill and 62;are provided. The gage has a hooked portion comprising a down-turned end 64 to contact with the periphery of the free edge of the welt and this gage is adjustably secured to the, tiltable arm 30 so that its relation to the work-supporting roll 26 remains unchangedwhen the arm is pulled down against the tension of the spring 32to facilitate the presentation of a piece of work. This pullingdown of the arm may be accomplished by a chain 66 towhich a treadle (notshown) is-attached. It will be seen in Fig. 4 that when; the roll 26 is in its depressed position, it will be easy for the operator to bring the edge of the welt l2 into contact with thedepending end 64 of the gage, 60 For contact with the other edge of the welt, the gagefil'has a down-turned end 68 and it will be noted that this down-turned end is inwardly inclined forwardly toward the gripping rolls so that the welt will be gradually pushed over into contact with the end 64 of the other gage 60 as it moves into the machine. This will be accomplished without binding; It will be noted that the gage 62 is'adjustably secured by means of screws 10 to a bracket 12, which in turn is attached to the frame 24 of the machine by screws 14 passing through vertical slots in the bracket. This makes it possible to adjust. the elevation of the bracket and the gage carried e e y wi e the a e 62. ma e adjust d hori- 20 and 26 which act zontallyby reason of slots T6 formed therein and through which the screws 10 pass.

In the use of the machine, the work will be presented to the lower roll 26 and the gage end 64 when the roll and gage have been depressed, 5 as shown in Fig. 4, by pulling down on the chain 66. As the latter is released, the spring 32 will raise the lower roll 26 to cause the welt to be gripped by the rolls 20 and 26. The work will then be carried progressively through the ma- 10 chine, guided by the ends 64 and 68 of the gages 'as a coating of cement is applied to the flesh surface [4 of the welt, the upper being progressively pushed away from the welt to straighten the latter or cause it to stand away from the 15 upper.

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

1. In a machine for operating on work having 20 stitched together parts such as a shoe upper and a welt stitchedthereto prior to the lasting of the shoe, coacting rolls for engagement with opposite faces of one of the stitched-together parts thereby to feed the work progressively through the machine, and means associated with one of said rolls for engagement with the other part of said stitched-together work, said means having a work-engaging surface which forms an obtuse angle with the work-engaging portion of the a l) peripheral face ofthe adjacent roll.

2. In a machine for operating on prewelt shoe uppers before they are lasted, coacting rolls for gripping-opposite faces of the welt, and means associated with one of said rolls and having c835 face to engage the outer surface of the upper to push it away from the welt, said face forming an obtuse angle with the work-engaging portion of the periphery of the adjacent roll.

3. In a machine for operating on prewelt shee uppers, coacting rolls for gripping the welt'of anunlastedupper, one of said rolls having afrustoconical portion, the work-engaging surface of which formsan obtuse angle with. the work-gripping surface of the roll therebyto push the upper away from the welt.

4. In a machine for operating on prewelt shoe uppers, an overhead cement-applying roll the lower face of which is exposed for the presentation of work thereto, and'a work-supporting roll kn cooperating, therewith and having a peripheral face substantially parallel to the face of the applying roll and also having a face to engage the upper attached to: the welt to enlarge the angle between the upper surface of the; welt andthe adjacent surface of, theshoe upperh;

5. In a machine for operating on prew'elt shoe uppers, a substantially cylindrical applying roll,

means for supplying cement to said: roll, a cooperating work-supporting rollhaving. a substan-t tially cylindrical portion, said work-supporting roll also having a frusto-conical portioninclined outwardly from the. work-contacting portion. of its supporting surface, and means for yieldingly urging said rolls toward: one another;'

6. In a machine for operating on prewelt shoe uppers, coacting rolls for gripping the outwardly extending welt, means for supplying' cement to one of said rolls for application to the welt, and means engaging the shoe upper to bend it aWay IO from the adjacent surface of the welt.

.7. In a machine for operating on. prewelt shoe uppers, coacting rolls for grip-ping the; outwardly extending welt, means for supplying cementto onecf said rolls for application to the we1t,,mea.ns -I;&

engaging the shoe upper to bend it away from the adjacent surface of the welt, and guides engaging the opposite edges of the welt.

8. In a machine for operating on prewelt shoes, a driven cement-applying roll having a knurled surface, means comprising a series of rolls and a cement trough for delivering cement to the upper surface of the applying roll, a cooperating, driven, work-supporting roll, means for relatively urging said supporting and applying rolls toward one another, said work-supporting roll having one surface which is substantially parallel to the knurled roll for holding the welt against said knurled roll, and a smooth frusto-conical surface adjacent thereto intersecting and forming an obtuse angle with the peripheral surface, the intersection of said surfaces being opposite a mid portion of said knurled surface.

9. In a machine for operating on prewelt shoe uppers, coacting work-treating rolls engaging opposite sides of the attached welt, and means for guiding the work to these rolls including a member extending across the welt and bent toward the interior of the shoe upper.

10. In a machine for operating on prewelt shoe uppers, coacting work-treating rolls engaging opposite sides of the attached welt, and means for guiding the work to these rolls including a member overhanging the upper surface of the welt and bent down toward theinterior of the shoe, said member having a portion inclined inwardly and forwardly for engagement with the outer edge of the welt.

11. In a machine for operating on prewelt shoe uppers, a narrow cement-applying roll to coat the flesh surface of a welt attached to a shoe upper, a work-supporting roll for engaging the grain surface of the welt, and adjustable guides one of which provides an abutment for the outer edge of the welt and. the other of which provides a hooked portion to overhang and engage the inner edge of the welt thereby to guide the welt into the machine in alinement with the cement-applying roll.

12. In a machine of the class described, a cement-applying roll, a pivoted carrier, a worksupporting roll journaled in said carrier for movement therewith toward and away from the cement-applying roll at the will of the operator, 2. guide for engagement with one edge of a piece of work, said guide being mounted in a predetermined relation to the cement-applying roll,

and a second guide for engagement with the other edge of the work, said second guide being mounted on said carrier for movement with the worksup-porting roll toward and away from the cement-applying roll.

13. In a machine for operating on prewelt shoe uppers, a cement-applying roll, a cooperating work-supporting roll, means by which an operator may move said work-supporting roll away from the cement-applying roll to facilitate the positioning of work thereon, a guide for engagement with the outer edge of the welt mounted for movement with the work-supporting roll toward and away from the applying roll, and a guide for engagement with the other edge of the welt having a predetermined relation to the cement-applying roll.

CHARLES E. HOOD.

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