US3757373A

US3757373A - Apparatus for cementing together cut-to-size shank upper material

Info

Publication number: US3757373A
Application number: US00185057A
Authority: US
Inventors: E Betke
Original assignee: Dynamit Nobel AG
Current assignee: Dynamit Nobel AG
Priority date: 1970-09-30
Filing date: 1971-09-30
Publication date: 1973-09-11
Anticipated expiration: 1990-09-11
Also published as: DE2048021A1; CH536611A; IT942570B; FR2108709A5

Abstract

An apparatus for bonding a shoe lining with a shank upper material, one of which is provided with a pressure-activated adhesive cement, which comprises bottom mold means for supporting the lining and shank material to be bonded; an upper mold means having an air intake means and an elastic means secured to said upper mold to define a chamber in communication with said air intake means, said chamber being expanded by introducing air through said intake means to press the elastic means against the shoe lining and shank material to effect bonding therebetween.

Description

Elnited States Betke atent [1 1 [4 1 Sept. 11, 1973 APPARATUS FOR CEMENTING TOGETHER CUT-TO-SIZE SHANK UPPER MATERIAL [75] Inventor: Erich Betke,Troisdorf-Spich,

Germany [73] Assignee: Dynamit Nobel Aktiengesellschaft,

Troisdorf, Germany 1221 Filed: Sept. 30, 1971 m Appl.N0.: 185,057

[30] Foreign Application Priority Data Sept. 30, 1970 Germany P 20 48 021.1

521 Us. Cl. 12/52 [51] Int. Cl A43d 11/00 [58] Field of Search 12/1 R, 1 W, 8.1, 12/52, 53.5, 54.2, 543,146 L, 54.1,] F, 133 B, 128 N [56] References Cited UNITED STATES PATENTS 3,160,899 12/1964 Bille et al. .Q. 12/1 F 2,648,079 8/1953 Ushakoff 12 54.1 2,805,432 9 1957 Riggs 2,962,734 12/1960 Lorenzo 12 1 F Primary Examiner-Patrick D. Lawson AttorneyCraig, Antonelli & Hill [57] ABSTRACT An apparatus for bonding a shoe lining with a shank upper material, one of which is provided with a pressure-activated adhesive cement, which comprises bottom mold means for supporting the lining and shank material to be bonded; an upper mold means having an air intake means and an elastic means secured to said upper mold to define a chamber in communication with said air intake means, said chamber being expanded by introducing air through said intake means to press the elastic means against the shoe lining and shank material to effect bonding therebetween.

10 Claims, 2 Drawing Figures Pmemmwl Hm 3.757. 313

SHEET 2 OF 2 INVENTOR ERICH BETKE 004 QMfQMQJLL' 4 Mi ATTORNEYS 1 I APPARATUS FOR CEMENTING TOGETHER CUT-TO-SIZE SHANK UPPER MATERIAL The present invention relates to an apparatus for the cementing of cut-to-size shoe lining, preferably provided with an activated fusion adhesive, to a cut-to-size shank upper material, said apparatus having a horizontally extensible base plate with a supporting bottom mold and an upper hood which fits over the mold.

In particular, this invention contemplates an apparatus for cementing shoe linings of a predetermined size with shank upper materials of corresponding predetermined sizes which comprises a bottom supporting mold for the material to be bonded, said mold being exchangeably attached to a horizontal base plate and being assembled in the manner of building blocks from individual units; a vertically reciprocating, rigid hood having a centrally disposed air feed pipe and adapted to conform to the contours of the bottom supporting mold, and an elastic sheet having a thickness of several millimeters, said sheet being carried by the hood in a loosely sagging manner and being mounted in an airtight manner over an inner chamber formed in the hood by means of screws and metallic strips.

- Advantageously, the hood carries at the rear a partial cover plate having a cutout portion that is suitably fashioned to be somewhat wider than the transverse or cross-sectional profile of the building-block or supporting mold.

The building-block mold formed of wood, plastic, or metal is, in each case, made up of two parts. The upper part, which 'is also called the exploding or fragmented part, can be readily exchanged; whereas the lower part or base portion, is in most cases utilized in the same shape. The exchangeable fragmented parts differ from one another by having upper faces or surfaces of varying angles of inclination, ranging preferably between 20 and 70.

The shaping pad proper for effecting the pressure on the shoe shank sections to be laminated consists of a highly elastic rubber sheet preferably having a thickness of, for example, 5 mm. In contrast to pressure pads heretofore known, the present invention resides, inter alia, in that its material is highly elastic, since this feature in particular provides the prerequisites for a foldfree or crease-free pressing of the materials to be laminated in conjunction with the shape of the hood. The hood provides an approximate negative mold with respect to the building-block mold, specifically in the lower zone at a'spacing of, for example, 25 mm. between these molds.

Another essential feature is that the air intake pipe is disposed in the center of the counterpressure mold or hood, whereby the pressure on the building-block mold becomes effective, first of all, in the center and initially fixes the shoe shank section to be laminated at this point. The pressure then increases toward the sides from the top toward the bottom, thus smoothing the laminating section and in this way preventing the formation of creases with certainty. Even shank sections provided with buckles, buttons, bows, straps, or the like can be joined flawlessly to the shoe lining by the use of the apparatus of this invention.

In the initial condition, the building-block mold is extended and the counterpressure mold or hood is moved to its top position by appropriate machine support including actuating means for moving the molds together This mode of operation ensures that the punched-out shoe lining and shoe upper sections fixed together by hand can be placed flawlessly, without any impediment onto the building-block mold, this mold having been composed in accordance with the shank sections to be laminated to the linings. After the machine has been turned on, the base plate with the building-block mold is moved underneath the counterpressure mold and, at the same time, the counter-pressure mold descends, and air is blown into space formed between the elastic sheet and the counterpressure mold. By this exactly coordinated operating procedure, a reduction of the total pressing time to 1-5 seconds is attained, wherein the pressure provided by the counterpressure mold is to range between 0.5 and 3 atmospheres gauge.

During the restoration of the apparatus into the starting position, which is especially advantageous for removing the pressed shoe shank from the building-block mold, three process steps likewise take place chronologically, namely the discharge of air from the counterpressure mold, the raising of the counterpressure mold, and the horizontal extension of the base plate with the building-block mold.

The apparatus of this invention will be further understood by the following detailed description of one of its embodiments and to the accompanying drawings in which: v

FIG. 1 is a view showing a verticallongitudinal section through the apparatus of the invention, and

FIG. 2 is a rear view of the apparatus taken in the direction of the arrow, wherein the mounting means of a machine support are not illustrated.

In FIG. 1, reference numeral 1 designates support mountings of the hood 2 at the machine support for effecting the upward and downward movement of the hood. Numeral 2a indicates the lower zones of the hood 2, extending in parallel to the upper surface of the bottom supporting mold. Air intake pipe 3 is located centrally in the hood. The rubber sheet 4 is attached to the hood by screws 5. The supporting or building-block mold is provided with a bottom portion of part 6. Reference numeral 7 designates expanding or exploding molds or mold elements (I) through (X). It will be ap-. preciated thatFIG. 1 schematically shows the relative position of each of the different mold elements; whereas in use only one of these moldelements willzbesecured to" the bottom portion 6, depending on the shape of the shank material to be bonded. Screws 8 are provided for fastening the lower part of the building I block mold to the horizontal base plate 11, and mounting pins 9 for attaching each of the exchangeable mold elements are provided between the elements and part i 6. The left-hand end of the hood carries a partial cover plate 10 which defines a space between hood 2 and

mold

6, 7, as for example, indicated in FIG. 2.

A cut-to-size shank material and a punched-out lining having an adhesive, e.g. a pressure sensitive adhesive, are placed on the bottom mold with the lining adjacent to the upper surface of the bottom mold. Theh the hood 2 is placed on top of the bottom mold and air introduced into the inner chamber formed by sheet 4 via intake pipe 3 expands the chamber causing sheet 4 to press against the shank material thereby bonding the lining thereto.

What is claimed is:

1. An apparatus for bonding a shoe lining to a shank upper material, one of which is provided with an adhesive cement, which comprises bottom mold means for supporting the lining and shank material to be bonded; an upper mold means including a hood shaped to conform to the contours of the bottom mold means and an air intake means disposed centrally in said hood; and an elastic means secured to said upper mold means for expanding against the shoe lining and shank material to effect bonding therebetween upon the introduction of air through said air intake means wherein the elastic means expands initially against a center portion of the shoe lining and shank material supported on said bottom mold means and thereafter sideways, thereby providing a crease-free bond of the shoe lining and the shank material.

2. The apparatus of claim 1, wherein said bottom mold means includes a two-part bottom mold secured to a horizontally extensible base plate.

3, The apparatus of claim 1, wherein said bottom mold is formed from an upper exchangeable mold element having an upper surface disposed at an angle of inclination, and a lower part adapted to be secured to said upper mold element.

4. The apparatus of claim 3, wherein the angle of inclination of the upper surface of said upper mold element is selected from the range of 20 to 5. The apparatus of claim 1, wherein the elastic means comprises a rubber sheet.

6. The apparatus of claim 1, wherein the hood carries a partial cover plate at the rear having a cut-out portion suitably fashioned to be wider than the transverse profile of the bottom mold means.

7. The apparatus of claim 1, wherein the air intake means comprises a pipe centrally located in said hood.

8. The apparatus of claim 7, wherein the elastic means comprises a rubber sheet secured to the outer periphery of said hood to define said chamber.

9. The apparatus of claim 8, wherein the sheet has a thickness of several millimeters and is mounted to said hood by screws in an airtight manner.

10. The apparatus of claim 1, wherein the elastic means is carried by the upper mold means in a loosely sagging manner.

Claims

3. The apparatus of claim 1, wherein said bottom mold is formed from an upper exchangeable mold element having an upper surface disposed at an angle of inclination, and a lower part adapted to be secured to said upper mold element.

4. The apparatus of claim 3, wherein the angle of inclination of the upper surface of said upper mold element is selected from the range of 20* to 70*.

5. The apparatus of claim 1, wherein the elastic means comprises a rubber sheet.