US2663034A - Lasting machine - Google Patents

Description

Dec. 22, 1953 H. SCHWABE 63 LASTING MACHINE Filed Sept. 19, 1950 3 Sheets-Sheet l Dec. 22, 1953 H. SCHWABE LASTING MACHINE 3 Sheets-Sheet 2 Filed Sept. 19. 1950 a 3 q 9Q m 0- o. v i 1 o v Q Dec. 22, 1953 H. SCHWABE 2,663,034

LASTING MACHINE Filed Sept. 19, 1950 3 Sheets-Sheet 3 5- null Patented Dec. 22, 1953 UNITED STATES *ATENT OFFICE 2,663,034 'DESSTiNG MACHINE .Herma'niSchwabe, New York, N. Y. Applications'eilt'ember 19,19 s;sensi Nos1's5js14 m Ol-aims.

Y This invention c'omprises'a new and impr'oved lasting machine useful in the general field of shoemaking but particularly for 'cover lasting, that is to say, lastingthe margin-of a cemented binding strip about the edge of an insole or a platform sole.

The object of the invention is to provide a machine of this character whichis more compact in its structure, more convenient for the operator, andmore effective in its lastingfunction than machines heretofore'available. To this end an important feature of the machine comprises the combination of 'feed rolls 'op'eratingto engage the margin of the binding strip or the lasting margin of theu'p'per'as the case maybe, a wiper roll acting on themargin as it leavesthe feed rolls, and a flexible smoothing and ironing helix extending inwardly over the shoe bottom "beyond the range of wipingacti'on of the wiper roll whereby the'margin is smoothed and iro'ned and its entire edge securely united to'thesole. 'I have found that a wiper roll havihgaribbed end surface'is very eflectivefor'wiping the margin in over the sole edge, but order to provide'a I compact structure and to locate the wiper roll close to'the feed rolls where it is inostefiective, its diameter must "be limited so that in some *cases it maynot cover the entiremargin. Consequently I provide a flexible driven helixwhich extends transversely over the'shoe bottom c'losely behind the wiperroll and which is of suflicient length to iron and smooth not only the portion of the margin which "is'wiped inwardly by the wiperroll, but also "the inner edge 'ofthe margin 'whichmay liebeyond the range of the wiper r011.

It is b'lieved'th'at this combination Of wiperron having "an effective end surface and ironing helix having an effective longitudinal surface has not heretofore been available to the shoemaking industry.

Further features of the invention reside in the ironing helix. This may be'advantageously constructed of spring wire lose wound in a helix "presenting a body which is stiff biit "capable hf bending under substantial pressure sothat'it will 2 be best understood and appreciated. from :the following description of a preferred embodiment thereof, selected for purposes of illustration and shown in the accompanying drawings in which:

Fig.1 is a plan view of the machine,

Fig. 2 is a fragmentary View of the gearing,

Fig. 3 is a fragmentary sectional view on "the 'line=33 of Fig. 4,

Fig. 4 is a view in elevation showing the machine-housing in sectionon the lined-4 of Fig. 1,

Fig. '5 is a plan view showing the relation-of theinstrumentalitiesofthe machine to the-shoe bottom,

Fig. 6 is a detailed View of the-ironing helix,

Fig. '7 is a plan view showing the bottom face of the wiper roll,

Fig. 8 is a fragmentary viewon'an'enlarged scale showing portions of the wiper roll and-one feed roll,

Fig. 9 is a sectional view of the rolldriving mechanism, and

Fig. 10 is a'fragmentary view of the machine in front elevation.

The illustrated machine will be described as it is utilized in the operation of cover lasting, that is to say, stressing the margin of a binding strip'upwardly and smoothly over the edge of a sole, overwiping the margin on the shoe bottom and adhesively securing it thereto. This treatment of the margin of the binding strip corresponds to the treatment of the lasting margin of the upper in conventional lasting 'for which the illustrated machine may also be employed.

The'relative position of the instrumentalities of the machine in respect to eachother and to the shoe bottom is best shown in Figs. 4 and 5. There are four'oi these elements and they comprise a feed roll It having a corrugat d surface provided with feed spurs H and being fast to the lower end of the vertical shaft it by which it is driven when the machine is in operation. C'ooperatingwith the feedroil it is an idle feed roll [3 alsohavingfa corrugated surface andbein -mounted upon the lower end of a stub shaft M, as indicated in Fig. 3. These two feed rolls are yieldingly urged together and grip between them the upstanding margin of the bindin strip upon which they exert a positive feeding and gripping action. The surface of the idle roll it is circum 'fer entially grooved to receive with clearance the spurs ll of the feed roll it.

Adjacent to the feed rolls ill and i3 and immediately behind them in the direction of Ifeeding fm'oveinent 'is a wiper roll it having upon its lower-end surface a spiral i'ibit, as shown in Fig. 7. This wiper roll is fast to the lower end of the vertical shaft I7, and like the feed rolls is fixed in its vertical position. The bottom or end surfaces of the three rolls described, and particularly of the idle roll I3, act as a height gauge determining the vertical position of the shoe bottom as it is presented for the lasting operation. The wiper roll it is located substantially in line with the common tangent of the feed rolls so that about half the area of its end surlace overlaps the shoe bottom.

Immediately beyond and behind the wiper roll [5 is provided an ironing helix in the form of a close wound spring is fast at its inner end to a horizontal spindle It by which it is driven. The helix extends transversely over the shoe bottom in a direction substantially at right angles to its contour at the operating point. The spindie is completely fills and rigidly supports the inner end of the spring" helix it, as shown in Fig. 6, while leaving the remainder of the coil free to yield vertically and so accommodate itself to the contour and height of the shoe bottom. The spring ironing helix is continuously driven by the spindle is in such direction that on account of its helical formation it tends to iron down the inturned margin of the binding strip, smooth down any wrinkles therein, and press it yieldingly and uniformly down upon the cement-coated bottom of the sole to which it is being lasted. The ironin helix is long enough to extend beyond the inner edge of the margin and so insures that the entire margin is ironed down and that none of it is left in uplifted condition.

From the foregoing description it will be seen that the upstanding margin of the binding strip is first engaged in substantially vertical position by the feed rolls it and i3, gripped securely so that the margin is snugly conformed to the contour of the sole, and forwardly in the direction of the arrow hown in Fig. 5. The feeding operation is positively carried out by the action of the spurs ii. the margin of the binding strip leaves the feed rolls it is immediately turned inwardly over the shoe bottom by the wiper roll subjected to a substantial inward wiping by the action of the spiral rib it. Upon beyond the wiper roll it, the inturned to a severe yieldin pressure and ironing, thus concluding lasting operation and leaving the margin of the binding strip securely and. smoothly cemented to the insole or platform sole as the ihe general construction of the machine and the means for driving and controlling its operating instrumentalities will now be described. The machine comprises a hollow column 26 to the upper end of which is secured the main head casting it. To the rear end of the casting is hir'red a cover 22 and to its forward end is secured a gear housing The casting includes an internal motor bracket 2K. to which through suitable fittings is secured a vertical motor 25. To the upper end of the motor shaft is secured a step pulley comprising a small sheave 26 and a larger sheave 2?. The sheave 2% drives a vbelt passing about a larger pulley 29 arranged to rotate on a vertical shaft to projecting upwardly from a branch of the motor fitting 2s. The pulley is also a step pulley having a small sheave 3! about which passes a V-belt 32 driving a pulley The pulley 33 is mounted on ball hearings to rotate about a vertical shaft 34 is immediately engaged and subjected projecting upwardly from a part of the gear housing and best shown in Fig. 9. The lower face of the pulley 33 is a finished clutch face and cooperates with a clutch disk 35 having a tubular stem and being mounted to slide vertically upon the shaft 34. it is normally held upwardly in engaged position by a compression spring 36 which encircles the stem of the clutch disk and bears at its lower end upon the upper face of a drive gear 3?. The clutch disk 35 is disengaged by a clutch rod 38 telescopically received within the shaft 35 and bearing at its lower end upon a cross pin 39. The drive gear 3? is formed as a part of the shaft 3 and the latter is slotted to receive with clearance the cross pin and normally driven by it so long as the clutch disk 35 is rotated. The gear 3? has a downwardly projecting stub shaft ll for which bearings are provided in a portion of the gear housing 2 3.

In order to disengage the clutch and bring the drive gear 3? to rest, an arm 48 is pivotally mounted upon the top of the gear housing provided with a hardened contact stud l! which is arranged to engage depress the clutch rod 38 when the arm it? is swung in a clockwise di rection. At its free end the arm i is connected to a vertical rod :32 and the latter is connected through links 43, and 5 to cars projecting from the motor bracket 2 treadle rod t3 has adjustable swivel connection with the intermediate link t l. it will be seen, therefore, that by depressing the treadle rod ii; the clutch rod is depressed against the compression of the spring 36 and the clutch disk. 35 separated from the clutch surface of the pulley 35?. The spring acts at all times to hold the drive gear fiGV-fil the upper face of its underlying bearing.

The drive gear 3? meshes with a pinion gear d8 fast to the upper end of the vertical shaft i2 which carries the feed roll it. The cooperating feed roll is is mounted for free rotation on the lower end of a stub shaft id carried by a rocker member herein shown as a bell-crank lever ill having an arm which is normally disposed vertically and being mounted to swing about a horizontal pivot pin supported in an car 553 projecting forwardly from the gear housing 23. The other arm of the lever 39 extends inwardly and is connected at its inner end to a tension spring 5! adjustably suspended from a bracket within the cover of the machine and acting at all times to urge the roll 93 toward the roll Hi. This arm of the bell-crank lever is also connected by a pin 52 to the link t3 and accordingly depression of the treadle simultaneously separatesthe feed rolls it! and i3 and interrupts the driving con nection to the feed roll it and the wiper roll 55. While this condition exists the operator may conveniently present a shoe to the machine.

The spindle 59 which carries the flexible helix i8 is mounted in an auxiliary casing having a horizontal tubular portion 55 which merges into a vertical tubular portion 5E. The casing also includes a web portion E i in which are provided vertical slots receiving bolts 57 by which the auxiliary casing is secured to the gear housing shaft 60 which is provided with bearings in the vertical portion of the auxiliary casing. The shaft 60 carries at its upper end a pulley 6| about which passes a V-belt 62 driven by the larger sheave 21 at the upper end of the motor shaft. It will be seen, therefore, that the spring helix I8 is driven continuously at a high rate of speed. lhe adjustment provided for the auxiliary casing is well within the range of which the driving bolt 62 will accommodate itself.

The wiper roll [5 as shown in Fig. 8 is fast upon the lower end of the vertical shaft i7 journaled like the shaft I2 in the housing 23. A gear 53 fast upon the upper end of the shaft 11 meshes with the drive gear 31 as shown in Fig. 2. Consequently the wiper roll [5 is driven when the clutch disk 35 is engaged and is brought to rest simultaneously with the feed roll I0 upon depression of the treadle rod 46.

Having thus disclosed my invention and described in detail a preferred manner and mechanism for putting it into practice, I claim as new and desire to secure by Letters Patent:

1. A lasting machine comprising cooperating feed rolls rotatable about substantially parallel vertical axes for feeding and gripping the margin of a binding strip, one of said rolls having an end surface engaging the shoe bottom, a wiping roll adjacent to the feed rolls having a ribbed end surface for wiping the margin inwardly as it leaves the feed rolls, a flexible close wound spring extending transversely across the shoe bottom adjacent to the wiper roll, and means for rotating said spring about its axis.

2. In a lasting machine having cooperating feed rolls for advancing the updrawn margin of the work, a flexible ironing tool having a helical work engaging face and comprising a spindle and a close wound spring secured at one end to the spindle and projecting beyond the end of the spindle, the spring itself thereby being free to conform yieldingly to the bottom of a lasted shoe passed beneath it, rigidly mounted bearings for the spindle, and mechanism for driving the spindle and thus rotating the spring.

3. In a lasting machine, cooperating feed rolls for updrawing the cement-coated lasting margin of a binding strip with respect to a sole in a shoe bottom, a wiper roll adjacent to the feed rolls having an end wiping surface for wiping the margin inwardly over the sole edge, and a driven spring helix extending inwardly beyond the edge of the inwiped margin and beyond the range of wiping action of the wiper roll, whereby the margin is smoothed and ironed and its entire inner edge securely united to the sole.

4. In a lasting machine, cooperating feed rolls operating to grip the lasting margin of a binding strip and one of which is mounted for bodily movement, a wiper roll located in position to act on the margin as it leaves the feed rolls, a single drive gear for one of the feed rolls and the wiper roll, a clutch driving said gear, and treadle operated mechanism for simultaneously disengaging the clutch and separating the feed rolls.

5. In a cover lasting machine, a pair of feed rolls mounted on normally vertical shafts for engaging and advancing the lasting margin in updrawn condition, a wiper roll having an end wiping face and being located close behind the feed rolls with its axis substantially in line with their common tangent, and a spring helix rotatable about an axis disposed transversely to and above the shoe bottom and close behind the wiper roll.

6. In a lasting machine, cooperating feed rolls operating to engage the lasting margin of a binding strip, a wiper roil located in position to act on the margin as it leaves the feed rolls, an ironing helix disposed transversely at the rear of said Wiper roll, driving mechanism including a clutch in train with a feed roll and said wiper roll, and separate driving mechanism for said helix.

7. In a lasting machine, cooperating feed rolls, one having a fixed vertical axis and the other an angularly movable axis, a wiper roll, geared connections between the Wiper roll and one of the feed rolls, a helix of close wound spring wire disposed transversely and adjacent to the Wiper roll, a horizontal driving spindle therefor, a vertical shaft having a geared connection therewith, a pulley at the upper end of said shaft, a second shaft having a pulley and geared connections with one of the feed rolls, a motor, and separate belt connections between the motor and each of the pulleys above mentioned.

8. A cover lasting machine comprising a pair of cooperating feed rolls, a roll having an end wiping face located behind the feed rolls in the direction in which the work is fed by them, a rotary ironing tool located adjacent to the wiping roll, gear mechanism for simultaneously driving the following elements, viz. one of the feed rolls and the Wiper roll, and treadle operated means for interrupting the operation of both of the said elements by the gear mechanism.

9. A cover lasting machine comprising a feed roll rotatable about a fixed axis, a cooperating feed roll mounted in a spring pressed rocker member, a wiper roll located behind the feed rolls in the direction of the work feed, an independently driven rotary ironing tool located adjacent to the wiper roll, gear mechanism connected to one feed roll and to the wiper roll, a clutch controlling said mechanism, and treadle operated means for simultaneously disengaging the clutch and swinging said rocker member to separate the feed rolls.

10. A cover lasting machine of the character described in claim 9 in which a single motor drives the ironing tool and the feed and wiper roll gear mechanism through separate trains of operating connections.

HERMAN SCHWABE.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,313,809 Gare Aug. 19, 1919 1,867,727 Buttress July 19, 1932 2,251 ,284 Kamborian Aug. 5, 1941 2,254,224 Kamborian Sept. 2, 1941 2,267,584 Cave et al. Dec. 23, 1941 2,438,919 Kamborian Apr. 6, 1948 2,509,650 Oakhill May 30, 1950 FOREIGN PATENTS Number Country Date 23,084 Austria Feb. 26, 1906

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