US2955302A

US2955302A - Wipers for lasting machines for the manufacture of shoes

Info

Publication number: US2955302A
Application number: US574700A
Authority: US
Inventors: Petrus M R Schoenmakers
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-03-30
Filing date: 1956-03-29
Publication date: 1960-10-11
Anticipated expiration: 1977-10-11

Description

Oct. 11, 1 P. M. R. SCHOENMAKERS 2,955,302

WIPERS FOR LASTING MACHINES FOR THE MANUFACTURE OF SHOES Filed March 29. 1956 IN VE N TOD P [7. R fit/zoenmakens ted; seee we not: ,LXSTflN'QMAClHNES FOR I MANUFACTURE or SHOES Petrus M. R. Schoenmakers, No. 119 Gasthuisstraat, Kaatsheuvel, Netherlands The invention relates to lasting machines for manufacturing shoes, in which each two opposite wiping elements engage the edge of the shoe upper and fold over this edge by swinging in their plane over the edge of a last. Prior art lasting machines fitted with such wipers were only capable of Wiping in uppers which are made on substantially straight flat bottomed lasts, because the flat wipers could not follow the shape of the last produced by the upward curvature of the last, so that the edge of the vamp had to be tacked on to the inner sole from the toe towards the waist. These tacks impair the elasticity of the shoe sole which is particularly desirable since it facilitates walking.

The invention has for its object to overcome this objection to the prior art and produces wipers for lasting machines, which wipers enable the edge of an upper to be wiped in a continuous operation from the toe of the shoe, over the ball and into the waist by simple means and without using tacks.

In solving this problem the nature of the invention 7 consists in that the upper surfaces of a pair of wipers are provided with tongues positively movable vertically from the plane of the wipers. These tongues are rigidly or detachably clamped near the toe portion of the wipers, follow the edge contours of the inner wiper edges and terminate back of the ends of the wipers and are movable substantially vertically from the plane of the wipers.

By suitably moving pressure elements after the wipers have been closed, the tongues are moved out of the plane of the Wipers and press the edge of the vamp tightly against the inner sole, following the curve of the bottom of the last to beyond the waist, so that a firm cohesion is insured by the adhesive material, e.g. glue.

Other features of the invention are set forth in the claims and are hereinafter described in detail with reference to the accompanying drawings, in which:

Fig. 1 is a section through the shoe upper with the edge of the vamp lasted up to the waist according to the invention;

Fig. 2 is a top plan view of the wipers and flexible tongues;

Fig. 3 is a cross section Fig. 2;

Fig. 4 is a cross section through the tongues on the wipers taken on line IVIV of Fig. 2;

Fig. 5 is a fragmentary longitudinal section through a tongue made from flexible material engaged by a pressure element; and

taken on line IIIIII of Fig. 6 is a fragmentary longitudinal section through I a tongue composed of a series of plates each engaged by a pressure element.

According to the preferred form of construction, the

wipers comprise upper

engaging elements

12, 13 which are urged towards the shoe last 23 by means on the element 32. The

elements

12, 13 will wipe the vamp edge 24 of the shoe upper 22 over the edge of the last 23. The upper 22 is retained on the last 23 by means of fl teiiiefl Oct. '11, 19st;

. 2 work holders' 27, 2's and is kept taut by the upper

wi mg elements

12, 13 and pressure element 32. The element 32, as shown in Fig. 1, is providedwi'th pressure angers 33 resiliently urgedvertieally to the plane of the wipers, which finger pr ss the wipers against the underside of the shoe. The wipers'by swinging togethe'r'ifi shearsfashion, fold the edge of the vamp 24 over the edge of the last 23. Longitudinally

flexible tongues

10 and 11, which are recessed in the upper surface of each

upper wiper element

12, 13 and are fixed thereon, for example, by means of rivets 14, near the toe portion of the wipers, are raised by means of a pressure element, for example, a pressure ram or post. These tongues are recessed surface-flush in

grooves

19, 20, Fig. 3, and follow the edge contours of the inner edges of the wipers at a slight constant distance therefrom, as shown in Fig. 2. The

tongues

10, 11 terminate at the waist of the last and include laterally projecting platforms 17, 18 which are engaged on their underside by

pressure plates

21, 21 shown in Figs. 1, 4 and 5, against which pressure posts 26 bear, regardless of the position of the

tongues

10, 11, ie the angular displacement of the wipers.

As shown in Fig. 1, the

tongues

10, 11 preferably have

extensions

15, 16 following the contours of the inner sole 25 beyond the platforms 17, 18 and extending to the waist. Due to vertical force imposed the pressure posts 26 which are moved by a pressure element 30 engaging a two-armed lever 29 midway its length to compensate for height variations and to equalize pressure, the

tongues

10, 11 are pressed against the curvature of the last progressively from the toe portion of the shoe, over the ball up to the waist so that the edge of the vamp resting on the tongues will be uniformly applied and caused to adhere firmly without the use ofany additional fasteners such as tacks.

The

tongues

10, 11 are preferably made from spring steel. However, the tongue may be made of highly flexible material. In this case pressure posts 26 as can be seen from Fig. 5, are connected with flexible tongues 15 by means of a ball joint 31 to make retraction possible.

Moreover, tongues 15 (Fig. 6) may be used which consist of spaced plates arranged one following the other in a row and on the underside of each of these plates being engaged by a hinged pressure post 26 so that the tongues can readily conform to different curvatures.

The invention is not restricted solely to the form of construction illustrated, but the shape and arrangement can be varied within the scope of the invention according to actual conditions and the characteristics of the lasting machine in which it is incorporated.

I claim:

1. A lasting machine comprising a wiper arrangement for lasting an upper on a last which is retained with the sole substantially horizontal and the waist portion curved upwardly therefrom, a pair of substantially planar wiper elements movable horizontally beneath the sole for wiping the toe portion of the shoe upper over the edge of the sole thereof, an element including resilient means engageable with the wiper elements in their horizontal movement for urging the same into pressing relation toward the sole, said wiping elements including longitudinally flexible pressing tongues recessed in the upper surface thereof and fixed adjacent one end for disposition beneath the toe portion of the sole, said tongues being engageable at the edge of the sole from the toe portion to the waist and being progressively displaceable vertically from said toe portion of the wiper elements and terminating in free ends, pressure portions on said tongues adjacent said free ends, and vertically displaceable force transmitting means engageable at said pressure portions for applying pressure adjacent the" ends of" said flexible tongues and forcing the edge of said upper from the toe portion to the waist into contact with said last.

2. The structure of claim 1; said vertical force transmitting means including means for'equalizing pressure on said pressure portions.

3. The structure of claim 1; said flexible tongues com prising a series of plate members each hingedly con'-' nected to'an individual force applying element.

UNITED STATES PATENTS Houghton July 3, 1888 Bates Feb. 14, 1933 FOREIGN PATENTS .C sr v'vi; --,i---.-? 'Nov- 3, 1.923

Germany Nov. 20, 1936