US950218A - Lasting-machine. - Google Patents

Description

J ARMBRUSTER.

LASTING MACHINE.

APPLICATION FILED JUNE 19, 1907.

950,21 8. Patented Feb; 22, '1910.

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ANDREW s. GRAHAM co PNOTO-LITKOGRAPNERS. wnsnmmml, n c.

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J. ARMBRUSTER.

LASTING MACHINE.

APPLICATION FILED JUNE 19, 1901.

950,218. Patented Feb. 22, 1910.

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ANDREW e. GRAHAM c0 vuuTO-UYHOGRAWERS. WASHINGTON. u. c.

J. ARMBRUSTER.

LASTING MACHINE. APPLIGATION'PILED JUNE 19, 1907.

Patented Feb. 22, 1910..

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J. ARMBRUSTER.

LASTING MACHINE.

APPLICATION FILED JUNE 19, 1907. 950,2 1 8. Patented Feb. 22, 1910.

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J. ARMBRUSTER.

LASTING MACHINE.

APPLICATION FILED JUNE 19, 1907.-

Patented Feb, 22,1910.

5 SHEETSSHEET 5.

ANDREW a GRAHAM c0 FHOTO-LITNDGRAFNERS. wnsummon. v.6.

JAKOB ARMBRUSTER, OF SOLTAU, GERMANY.

LASTING-MACHINE.

Specification of Letters Patent.

Application filed June 19, 1907.

Patented Feb. 22, 1910.

Serial No. 379,703.

To all whom it may concern:

Be it known that I, JAKoB ARMBRUSTER, director, German subject, residing at No. 261 Marktstrasse, Soltau, German Empire, have invented new and useful Improvements in Lasting-Machines, of which the following is a specification.

The subject of my invention is a lasting machine of particularly simple construction and very easy to work. The essential feature of the invention is that the last over which the leather upper is to be drawn, is so held in a movable part of the machine (for instance, a frame), that the upperand especially the back portion thereofon the last can be readily gripped from all sides by the tools in the machine and stretched over the last. Furthermore, according to this invention, the upper strained over the last is held in stretched condition on the latter by means of suitable devices provided on the top part, or frame, of the machine, whereupon the frame containing the last can, in the simplest manner, by treadle or otherwise, be lifted and then turned over so that the insole, with which the last has been provided prior to its being fixed in the machine, comes topmost, whereby the upper can be conveniently secured to the insole.

One form of construction of the new machine is illustrated in the accompanying drawings, in which:

Figure 1 is a longitudinal section through the machine in the working position. Fig. 2 is a cross section through the machine taken on the line A-B of Fig. 1. Fig. 3 is a side elevation of the movable upper part, or so-called frame, in which the last is secured. Fig. 4 is a plan of Fig. 3, and Fig. 5 a plan of this frame after it has been turned through 180 both on a vertical and a horizontal axis. Figs. 6-12 show details to be hereinafter referred to.

On the machine framing 1 there is mounted an upper part 2, preferably in the form of a frame, in such manner that it can be turned both about a horizontal and a vertical axis. The horizontal pin 3 of the upper part 2 rests in a bearing 5, which is carried by a pillar 6. The latter, which rotates in bearings 4, 7, secured'to the framing 1 of the machine, can be raised by depression of a treadle-lever 9 (Fig. 2) fulcrumed 011 the pin 8, so that the top part of frame 2 can be freely rotated above any projecting parts of the machine. The front cross-beam of the frame 2 presents a projection 11 (Fig. 1), which in the position of the parts in Fig. 1 engages in a corresponding groove 12 (Fig. 6) in the machine framing 1, so that rotary motion of the frame during lasting of the The last 21 provided with the insole 19 (Figs. 1 and 3) and upper 20 is secured in the frame 2, being pressed by the spindle 14 (which takes into a recess 22 in the last) against the support 17, 18 (Fig. 1). The

last thus held in proper position is free for access on all sides, and can be readily reached by the various tools of the machine. The frame 2 is also furnished with five screw- spindles 22, 23, 24 (Fig. 4), operated by hand-wheels 25. Their oflice is, after the upper 20 has been drawn over the last, to so hold the former that when the tools which effect the stretching have been released, the upper is still retained in the strained condition on the last. The front spindle 22 and the two adjacent lateral ones 23 can be slid respectively transversely and longitudinally of the machine by means of suitable slides 26, 27, as the shape and size of the last may require. The slides 27 are fixed in the desired position by racks 28 (Fig. 3), engaged by pawls 3O fulcrumed on pins 29, and held to the racks by springs 31. The cheeks or shoes 32 at the ends of the spindles are jointed to the latter, so that the shoes on being forced against the last may assume a position corresponding to the shape of the latter.

At the back end of the frame 2 is a guide 33 (Figs. 4 and 5), in which is a slide 35, actuated by a lever 34. The slide serves to work in the heel-piece of the upper, being for this purpose provided at the front end with a crutch or forked-piece 36 of the shape of the heel. After working in the heel piece, the slide 35 is fixed in place by means of ratchet teeth 37, engaged by a tooth 38 (see also Fig. 2) on the lever 34.

The fork 36, and thus the leather of the heel piece, is forced with suitable pressure against the last by means of a spring 39 (Fig. 3), secured at one end to the arm 40 of the frame 2 and at the other end to the slide 35.

The stretching of the upper over the last 21, secured in the frame 2, is done by means of four pairs of pincers 41, 42, 43 (Fig. 1). The pincers 41 are located near the tip of the last, while the two pincers 42 are located respectively right and left of the ball-part of the last, the pincers 43, again, being located below the heel of the last (Figs. 1 and 2). The three front pincers (41 and 42) are mounted on a plate 44 (Figs. 1 and 7) which slides in a groove 46 in the framing 1. the latter being actuated by means of a screw spindle (Fig. 1). The back pincers 43, which serve to draw down the rear portion of the upper, are guided in a second plate 47, which likewise slides in the grooves 46, which is actuated by hand or by any suitable device. By means of the sliding plates 44, 47 the pincers can thus be adjusted as the length of the last 21 may require. Since the widths of the lasts vary, the two pincers 42 are arranged to slide on the plate 44 also transversely of the last. This transverse adjustment may be effected in any suitable manner whatsoever; for instance by means of screws located in slots 49 in the angleiron brackets 48 (Figs. 1, 7, 8 and 9) between which the pincers are guided vertically. The brackets 48 are slotted at 50 (Fig. 9) to receive U-shaped slides 51, which carry the pins 52 by which the jaws are pivoted (see also Fig. 1). The shanks 53 of the pincers are connected by links 54, acting in the manner of tog les, with the rods These latter may e operated by handlevers 5,6 (for the side pincers 42), or by means of treadle levers 57, .58 (for the front and back pincers 41, 43 respectively). If one of the said hand or foot-levers is depressed, the jaws of the pincers in question are closed, owing to the action of the parts 55, 54, 53. The pincers thus grip the edge of the leather of the upper on the last (Fig. 1), and on continued depression of the lever (56 or 57) will draw down the gripped edge of the upper over the last, thus tightly stretching the leather of the upper over the latter. For the purpose of retaining the hand-levers 56 in depressed position, and thus maintaining the leather in stretched condition until operation of the shoes 32, a ratchet plate 60 (Fig. 6) is secured to the framing 1, between the teeth 59 of which a tooth 61 on the hand-levers 56 engages. The treadle-lever 58 for the back pincers is locked in similar manner. \Vhen the spindles 22, 23, 24 have been screwed up to the last, the pincers actuating levers are released, and the pincers automatically rise, open and release the edge of the upper. For this purpose the slides 51 are connected by rods 62 (Figs. 1, 8 and 9), crosspieces 63,

and arms 64, with draw-springs 65, whose top end is secured to, for instance, the guidep'lates 44, 46. The levers 56, 57 and 58 themselves are drawn upward on their release by draw-springs 66 (Fig. 1) secured to the machine-framing 1. The shanks of the pincers are movable in the slots 67 (Fig. 7) of the guideplates 44, 46. V

Fig. 10 shows a particular construction of guide 48 for the pincers. The pivot 52 of the pincer shanks on descent of the pincers is guided in a curved slot 68, whichtrends toward the interior of the machine. Thus on the upper being stretched the pincers do ward, but at the same time pull it below and around the last and insole.

Fig. 11 shows one manner of constructing the spindles for holding the upper in stretched condition on the last. The spindle lies in a bushing 69, in which, however, owing to the provision of an ordinary groove and feather, it can only slide'in longitudinal This form of construction has the advantage that even those uppers also which are somewhat too short, can be worked up. Furthermore, the pincers can be much easier employed, since the upper drops, as it were, of itself between the jaws. The guide 48 for the pincers, owing to their curved shape, is so shaped that on descent of the pincers the latter are first retracted for a short distance from the last in order that their nose may pass the tip of the latter.

The operation of the machine is as follows :-After a last 21 has been provided with an upper 20. and insole 19 in well known manner, it is firmly secured in the frame 2, on the support 17, by means of the spindle 14, as shown in F ig. 1. The back part of the upper is now introduced into the pincers 43, the latter closed, and after the front part of the upper has been pulled forward and stretched by descent of the pincers 41, the pincers 42, into whose jaws the overhanging edge of the upper already projects, are actuated by the hand-levers 56, that is to say, the hand levers 56 are depressed and cause the pincers to close and grip the edge of the upper, and, then, on further descent to stretch the upper still tighter over the last. The levers 56 are not merely draw the edge of the upper down-' then looked in their lowest positions by means of the teeth 59 and 61. Finally, after the rear pincers 43 have been drawn down by actuation of the treadle-lever 58, the shoes 32 arebrought into operation, in order to hold the stretched leather in its new position on the last and admit the releasing of the pincers, for the purpose of enabling the last, with the frame 2, to be raised and turned around in the manner below described. The shoes 32 are caused to act by rotation of the hand wheels 25 and spindles 22, 23, 24:. It will be found most advantageous to screw up the front spindle first and the lateral ones subsequently. 56, and the foot lever 58 for the rear pincers have been released, whereby the pincers are automatically drawn up by the action of the springs 65, 66 and opened, the frame 2 is lifted by actuation of the foot lever 9, whereupon it is turned aside on the pillar 6, in the bearings 4 and 7-, and then so turned over on the horizontal pin 3, that the insole 20 lies upward. In this position of the frame 2 the rear part, or heel piece, of the upper is worked in by means of the lever 34 and fork 36, whereupon the upper can be secured to the insole by hand or by means of suitable devices.

Having thus described my invention what I claim 1s:

1. In a lasting machine, a movable frame, a support slidable therein and disposed vertically and adapted to carry a last, means for holding the last therein permitting free access to it from all sides, lasting tools on the sides, and a gripper on the heel portion to insure a proper pulling over of the upper.

2. In a lasting machine, a movable frame mounted for elevation, means for holding a last therein permitting free access to it from all sides, and lasting pincers capable of adjustment to suit the size of the last, substantially as described.

3. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, two plates slidable in the machine framing, longitudinally of the last, three front lasting pincers carried by the one plate, and back lasting pincers carried by the other plate, substantially as described.

at. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, two plates slidable in the machine framing, longitudi nally of the last, and presenting guides having inwardly curving slots, and lasting-pincers carried by the guide-plates, and mov- After the hand-levers able down the curved slots into a portion below the last, substantially as described.

5. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, lasting pincers, means for elevating the frame to permit of its rotation and means, carried by the frame, for holdin the upper, previously strained over the ast by the pincers, substantially as described.

6. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, lasting pincers, means for elevating the frame to permit of its rotation and screw spindles, working in the frame, for holding the upper, previously strained over the last by the pincers, substantially as described.

7. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, lasting pincers, means for elevating the frame to permit of its rotation and screw spindles having joined shoes working in the frame, for holding the upper previously strained over the last by the pincers, substantially as described.

8. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, means, carried by the frame, for holding the upper previously strained over the last, means for elevating the frame to permit of its rotation a member slidable in the frame and having a crutch head adapted to fit over the heel portion of the upper, and means for actuatin said member, for working in said heel p'ortlon below the last heel, and a spring acting on said member for pressing it against the last substantially as described.

9. In a lasting machine, a movable frame, means for holding a last therein permitting free access to it from all sides, a plate slidable in the machine framing, longitudinally of the last, and presenting a guide having a curved slot which trends outward and then inward, and curve-nosed pincers carried by said guide-plate and movable down the said curved slot, whereby an outward and then inward motion is imparted to the pincers, substantially as described.

In witness whereof I have hereunto signed my name this 31st day of May, 1907, in the presence of two subscribing witnesses.

JAKOB ARMBRUSTER.

lVitnesses HERMANN LORENZEN, CARL LATZ.

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