US2286261A

US2286261A - Machine for applying pressure to shoe parts

Info

Publication number: US2286261A
Application number: US332527A
Authority: US
Inventors: Casavant Ernest
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1940-04-30
Filing date: 1940-04-30
Publication date: 1942-06-16
Anticipated expiration: 1959-06-16

Description

June 16, 1942.

E. CASAVANT MACHINE FOR APPLYING PRESSURE 'IO SHOE PARTS 2 SheetsSheet l Filed April 50, 1940 June 16, 1942. c s v 2,285,261

MACHINE FOR APPLYING PRESSURE TO SHOE PARTS Filed April 50, 1940 2 Sheets-Sheet 2 i 1% //\/l/E/\/ 717/3 60 M un-M Patented June 16, 194-2 MACHINE FOR APPLYING PRESSURE TO SHOE PARTS Ernest Casavant, Brockton, Mass, assignor to United Shoe Machinery Corporation, Borough of Flemington, N. J., a corporation of New Jersey Application April 30, 1940, Serial No. 332,527

9 Claims.

This invention relates to machines for applying pressure to shoe parts and is herein illustrated as embodied in a machine for pressin together a welt and an upper previously coated with cement. A machine of this type is illustrated and described in United States Letters Patent, No. 2,232,748 granted February 25, 1941, in the name of John M. Whelton.

The machine herein illustrated, similarly to the machine of the Whelton application above referred to, is intended particularly for assembling the welt and upper of a prewelt shoe of the type illustrated in United States Letters Patent No. 2,119,801, granted June '7, 1938, on an application of ,W. C. Vizard. This shoe is provided with a special welt having the usual outsole attaching extension, the margin of the welt opposite its outsole attaching extension being divided into three flaps, between two of which the margin of the upper is secured while the third flap is lasted to an insole. In assembling the upper and welt, cement is applied to the flesh surface of the margin of the upper and to the intermediate flap of the Welt and the margin of the upper is then pressed against the cemented flap of the welt to secure the welt and upper together, and thereafter the grain flap of the welt is laid against the grain face of the upper and the upper is secured between the two flaps of the Welt by sewn seams.

It is an object of the present invention to provide in a machine of the type above described means for reliably attaching the upper to the Welt particularly the edge portion of the upper which lies adjacent to the root of the grain flap of the welt. With this object in View, the present invention, in one important aspect thereof, consists in the provision in a machine for cement attaching a split welt and a shoe upper of a weltengaging roll, an upper-pressing roll constructed and arranged to apply different pressures to the bottom margin of the upper, and a member constructed and arranged to turn back a flap of the welt to permit the upper-pressing roll to act directly against the upper.

In order to prevent accidental contact of the cement-treated edge face of the upper with the cement-treated inner surface of the grain flap of the welt, the illustrated machine, in accordance with another feature of the invention, is provided with a work guide arranged to act on the Work at a point spaced from the operating point of the work-engaging rolls in a direction opposite to the direction of feed of said rolls, said work guide having a relatively thick portion for holding the work parts away from each other as they approach the operating point.

While the invention is herein illustrated in its application to a machine particularly adapted to press the margin of an upper against the interferred to.

mediate flap of a split welt, it will be understood that the invention is not limited in its scope to such machines, but is obviously applicable to machines adapted to cement attach other types of work pieces.

The invention will now be described with reference to the accompanying drawings illustrating a machine embodying the various features of the invention in which Fig. 1 is a front elevation of the head of the machine;

Fig. 2 is anenlarged view in front elevation illustrating portions of the rolls with the work parts in section between them;

Fig. 3 is an end elevation looking from the right of the machine as seen in Fig. 1; and

Fig. 4 is a view in front elevation similar to Fig. 2 illustrating the work guide.

The illustrated machine is similar in its general organization and in many of its details of construction to the machine illustrated and described in the Whelton application above re- Referring to Fig. 1, the illustrated machine comprises a frame IEI on which there is pivotally mounted at 12 for vertical swinging movement a lever or carrier l4 in which is journaled a shaft It to one end of which there is secured an upper-engaging roll l8 which acts against a welt-supporting roll 20 secured to one end of a shaft 22, journaled in the frame 10. The upper-engaging roll I8 is arranged to register with that portion of the welt-supporting roll between the center of its welt-supporting surface and its outer extremity. The roll I8 presses the bottom margin of an upper, for example, the upper 2 a portion of which is illustrated in section in Fig. 2, against the intermediate flap of a split Welt 26, cement having previously been applied to said parts for initially attaching them together. The roll [8 is pressed against the bottom margin of the upper 24 by the expansion of a heavy spring 28 (Fig. 1) surrounding a rod 3! and confined between an abutment member 32 threaded on the lower portion of the rod and the bottom of the frame in, the rod 30 being connected to the lever M by a link 34. For driving the rolls l8 and 20 to feed the work between them, there is journaled in the frame IE1 a counter-shaft 36 which operates the shafts I6 and 22 through

suitable gears

33, 40 and 42 secured respectively to the shafts 36, I6, and 22. The counter-shaft 36 is rotated by a power-driven belt 44 which acts on a pulley 46 secured to the outer end of said shaft.

Referring to Figs. 2 and 3, the upper pressing roll I8 has a work-engaging edge face which is non-complemental to the portion of the work which it contacts. The illustrated upper-pressing roll [8 has a peripheral portion 48 of relatively great diameter and another peripheral portion 50 of lesser shorter diameter. As illustrated in Fig. 2 the peripheral portion 48 is relatively narrow and is arranged to act on the edge portion of the upper. It will be understood that the peripheral portion 48 applies relatively heavy pressure to the edge portion of the upper thus insuring the creation of a strong and enduring cement bond between the edge portion of the upper and the intermediate flap of the welt.

For turning the grain flap 52 of the welt upwardly into the position illustrated in Fig. 4 a guide member or finger 54 is secured to the free end of the lever It by a clamping screw 56. The finger 54 has a relatively thick end portion 58 which, as illustrated in Fig. 4, is positioned between the inner surface of the grain flap 52 and the edge face of the upper 24 to hold said parts away from each other as they approach the operating point of said rolls, said finger, as illustrated in Fig. 3 being located in advance of the operating point. It will be understood that the finger may be adjusted either vertically or horizontally after releasing the clamping screw 56 which, when tightened, holds the finger in adjusted position.

As in the machine of the Whelton application, the welt is positioned relatively to the upper-pressing roll 13 between a flange 60 on the welt-supporting roll 29. and an edge gage 62.

Having thus 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 cement attaching two work pieces, the combination with a work-engaging roll of a work-pressing roll characterized by a work-engaging surface non-complemental to that portion of the work which it contacts, said work-engaging surface having an offset portion constructed and arranged to apply relatively heavy pressure along a determinate area of a work piece and having a portion constructed and arranged to apply relatively light pressure along an area adjacent to the first-mentioned area, and a work guide arranged to act on the work at a point spaced from the operating point of said rolls, said work guide having a relatively thick portion constructed and arranged to hold two work parts away from each other as they approach the operating point.

2. In a machine for cement attaching a split welt and a shoe upper, a welt-engaging roll, an upper-pressing roll, and a work-guiding member spaced from the operating point of said rolls in a direction opposite to the direction of feed of said rolls, said work-guiding member having a relatively thick portion constructed and arranged to hold portions of said work pieces spaced from each other in a horizontal line perpendicular to the direction of feed as they approach the operating point.

3. In a machine for cement attaching two work pieces, a work-engaging roll and a work-pressing roll constructed and arranged to apply relatively heavy pressure along a determinate area of -a work piece and relatively light pressure along an area adjacent to the first-mentioned area, and a work-guiding member spaced from the operating point of said rolls in a direction opposite to the direction of feed of said rolls, said work guide having a relatively thick portion constructed and arranged to hold portions of said work pieces spaced from each other in a horizontal line perpendicular to the direction of feed as they approach the operating point.

4. In a machine for cement attaching a split welt and a shoe upper, a welt-engaging roll, an upper-pressing roll having portions of greater and lesser diameter, the portion of greater diameter being arranged to act against an edge portion of the upper and the portion of lesser diameter being arranged to act against a portion of the upper adjacent to said edge portion, and a work guide spaced from the operating point of said rolls in a direction opposite to the direction of feed of said rolls and arranged to turn a flap of the welt away from the operating point of said rolls.

5. In a machine for cement attaching a split welt and a shoe upper, a welt-engaging roll, an upper-pressing roll having portions of greater and lesser diameter, the portion of greater diameter being arranged to act against an edge portion of the upper and the portion of lesser diameter being arranged to act against a portion of the upper adjacent to said edge portion, and a work guide spaced from the operating point of said rolls in a direction opposite to the direction of feed of said rolls and arranged to turn a flap of the Welt away from the operating point of said rolls, said work guide having a relatively thick portion constructed and arranged to hold the inner surface of the welt flap and the edge face of the upper away from each other as the welt and upper approach the operating point.

6. In a machine for cement attaching a split welt to a shoe upper, a welt-supporting roll, a member constructed and arranged to turn back a flap of the welt, and a roll for pressing the bottom margin of the upper against another flap of the welt, said upper-pressing roll being constructed and arranged to apply different pressures to the bottom margin of the upper.

7. In a machine for cement-attaching a split welt to a shoe upper, a welt-supporting roll, a member constructed and arranged to turn back a flap of the welt, and an upper-pressing roll for pressing the upper against another flap of the welt, said upper-pressing roll being constructed and arranged to apply relatively heavy pressure along a marginal portion of the upper and relatively light pressure along an adjacent portion of the upper.

8. In a machine for cement-attaching a split welt to a shoe upper, a welt-supporting roll, an upper-pressing roll, and a member for turning back a flap of the welt and spacing the welt and upper away from each other as they approach the operating point of said rolls, said upperpressing roll having portions of greater and lesser diameter for applying different pressures to the upper.

9. In a machine for cement-attaching a split welt and a shoe upper, a welt-supporting roll, a member for turning back a flap of the welt, said member having an end portion for holding the welt and upper away from each other as they approach the operating point, and a roll for pressing the upper against the welt, said roll having a portion of greater diameter adjacent to said member and a portion of lesser diameter remote from said member.

ERNEST CASAVANT.