US1828265A

US1828265A - Machine for the manufacture of glued shoes

Info

Publication number: US1828265A
Authority: US
Inventors: Walther Heinrich
Original assignee: Individual
Current assignee: Individual
Priority date: 1928-12-20
Filing date: 1929-07-27
Publication date: 1931-10-20
Anticipated expiration: 1948-10-20

Description

Oct. 20, 1931. H. WALTHER MACHINE FOR THE MANUFACTURE OF GLUED SHOES Filed July 27, 1929 2 Sheets-Sheet 1 Juve/dor; 76,#2/

Oct. 20, 1931. H. VwAL'n-nzR 1,828,265

MACHINE FOR THE MANUFACTURE F GLUBD SHOES Filed July 27, 1929 2 Sheets-Shes! 2 Patented Oct. 20, 1931 mICH WL'LTHER, 0l' FRANKFURT-ON-THE-IAIN-OBEBRAD, GERIANY um FOB THE IANUFACTUBE 0F GLUED SHOE p Application med July 27, 1929, Serial No. 381,472, and in Germany December 20, 1928.

lo of lued or cemented 'shoes by means of the sai machines. In the manufacture of glued shoes, the latter, at present, have to be left for about half an hour in the shoe-press under pressure. Then they must be dried without touching them for about two to three hours on shelves, before they can be subjected to further treatment. These drying pauses render the manufacture exceedingly slow, re-

quire large stocks of lasts and have other f2@ drawbacks. Attempts have' been made to eliminate these drawbacks by artificially Y ing the shoes in heated drying chambers.

' the g chambers, however, the uppers are also heated with consequent damage to the shoe. These drawbacks are eliminated by the present invention.

An important feature of the present 1nvention resides in the combination w1th a pressing cushion iilled with air or water of means for heating the cushion.` A

I prefer to use electric heating means formin a part of the presslngecushlon. Bnt oter heating means may used, for 1nstance, hot air or hot water may be mtroduced into the cushion.

' A further important feature of the mvention resides in an electric heating pad to be placed on the pressing cushion. l

Y These and other features of the inventlon, includin importantdetails of construction and com inations of parts will be hereinafter more articularly described and claimed.

In t edrawings:

Figure I shows the general arrangement of the machine in elevation partly in axial section in connection with a gluingpress described., in the United States .i atent No. 1,799,293 granted to me to which reference ma be had for details of construction.

Figure 2 is a longitudinal section of the the heating pad.

pad, in plan.

Figure 5 shows the three possible methods `of connection of the heating wires in the heating pad.

Figures 6 and 7 show the outlines of the cross sections of the last in the ball and joint.

Figure 8 shows the construction of the heating cord.

Referring now to the Figures 1 and 2, a shaft 1 is rotatably mounted in standards 4, d 5. To the rotatable shaft 1 is secured a carrier 14 which supports several press devices on its circumference. Each press device embodies a pan 8 which entirely encloses at the bottom and at the sides a rubber bladder 41. The rubber bladder is preferably permanently filled with air, water or the like. On

the rubber bladder 41- is placed a heating 15 pad 46, and on the heating pad a protective cover 42 is arranged as a closurerwhich en-V gages Yby a bead 42 with a corresponding groove under a ange 8 of the pan 8. The bladder and its protective cover form the pressing cushion. In. the present instance the cushion contains also a heating pad.

The heatin pad 46 (Figure 3 structed in suc a manner that the heat therefrom is transmitted chiefly in the upward direction. Between two asbestos fabric layers 47 is sewna heating cord. This is formed by a thin heating wire 48 wound on an asbestos core 49 and enveloped by asbestos 70. In order to protect the winding of the heating wire from tensile stresses and compression which may be produced during the pressing, thick insulating cords 71 may be arranged between the windings of the heating cord or the heating cord itself may be armored with a metal hose 7 5 or with a wire spiral. These stresses may also be avoided or reduced by leading the heating cord back and forth transversely at the front portion of the heating pad and longitudinally at the rear portion, i. e., 10o

Figure 4 shows diagrammatically'the ar- 5 rangement of the heating wires in the heating )is con-` that portion which is intended for the joint and heel, as indicated in Figure 4. The cross sections of lasts shown in Figures 6, 7, show how the heating pad has to adapt itself to the shoe in the front portion and in the joint. The heating pad has the same outline as the pan and the bladder, but the heating cord is sewn-in only in the central operative portion of the heating pad. Around the heating pad and at the bottom of the same are provided

thick asbestos layers

72 and 73 which prevent the heat from being transmitted to the iron pan. The entire heating pad may for the sake of safety be arranged in a rubber evelope 74 in order to keep the liquid away from the heating wire and to avoid short circuiting in the event of the water bladder bursting.

Iii each heating pad are sewn three heating cords a., b, 0 of which the cords a and 0 are formed into resistance spirals so that both spirals can be connected together in series or in parallel, or only one spiral may be switched in for the purpose of regulating the heating. The supply of current to the heating pad is eiected by means of a step switch 66. The latter is secured to the cap 51 in which are provided three sliding contacts 521, 522, and 523. The cap is secured to the standard 4 of the machine by means of screws 53. The sliding contacts are constantly pressed by springs 54- against the rotating slip rings 551, 552 and 553. The latter are firmly embedded in the insulating bod 56 which in turn is rigidly secured to the ont end of the rotary spindle 1 of the machine. From the slip rings, contact screws 57 lead through the insulating body and are electrically connected at the back thereof by nuts to the insulated supply wires or leads 581, 581 and 583. The latter lead at a suitable point to the distributor rings 591, 592 and 593 which are enclosed on all sides within insulating

rings

601, 602 and 603 and are rigidly secured to the shaft 1. The ring 591. is separated from the press pad support 14 by an insulating washer 6-1. At the circumference o f each of the distributing and insulating rings are arranged, in accordance with the number of press devices provided on the machine, three radial bores 621, 622 and 623 into which the plugs 63 project with their

pins

641, 642 and 643. The rings 59 and 60 form together a plug socket. From each of the plugs, a three-core cable 65 leads to a heating pad of a press point.

The switch 50 has four positions. In the position 0, the current is cut off. In the position 1, the current is admitted through all the parts with the index l and returns through the parts with the index 3. The

p parts with the index 2 are not energized. In

the heating pad itself, the current will `iiow in accordance with the diagram of connections I of Figure 5. As both resistances are connected together in series, the heating is but slight. In the position 2 of the switch 50, the current will pass to all the parts with the index 2 and return through all the parts with the index 3, the parts with the index l being devoid of current. In the heating pad the current will flow in accordance with the diagram of connections II of Figure 5. As now only one resistance carries current, the heating will reach a medium value. It will be twice as great as in the position V1. In the position 3 of the switch 50, the current will pass/in through the parts with the index 2 and return through all the parts with the indexes 1 and 3. In the heating pad there will now flow a current in accordance with the diagram of connections III of Figure 5. Both resistances are connected together in parallel. The heating reaches its maximum value and is twice as great as in the position 2.

When the press pad is to be placed in service, the strong heating current is switched on in accordance with the connection diagram III in order to ensure rapid heating and to save time. When the desired temperature has been reached, the medium heating current according to diagram II is switched on, which maintains the press pad permanently at the desired temperature during working. If there is a pause in the working, the heatin current is switched over to the connections o diagram I whereby the press pad will remain at the working temperature when no work is being done with it.

l/Vhen the press pad has been brought to the working temperature, and a shoe to be glued is operated upon, the sole ofthe shoe will move against and exactly adapt itself to the bottom of the last. In this movement, the cover 42, the heating pad 46 and the upper part of the rubber bladder 41 will also participate. This ensures that the sole of the shoe will everywhere fit the last bottom uniformly so that the heating temperature will also be uniform throughout. The asbestos cloth 47 is inextensible but flexible. The inextensibility ensures that no tension can act on. the heating wires and has therefore the same object as the special method of mounting of the heating cord spirals shown in Figure 4.

For the rest, the operation of the machine is effected in accordance with my patent mentioned. The shoe is placed by hand in an upright position on a press cushion, preferably on the uppermost one of the machine. The press bracket 9 pivotally mounted on the pin 50 is thereupon lightly pressed on the shoe by means of the pedal (not shown) and of the slide 13. The press bracket 9 is held in its position by the cooperation with the upper toothed end of the spring controlled -bell crank lever 17. When the Shoe is in the proper position, the machine is thrown into operation by means of a hand lever or pedal. The automatic 'drive of the machine caused the shaft 1 with the press cushion to be rotated forwardly to the extent of one press cushion. During this rotation, the roller 11 of the slide 13 engages a cam disc 7 so that the press bracket 9 will now force the shoe against the press cushion by power. In-the same way the press pan 8 with the press cushion is pressed against the shoe from the bottom, the slide 12 which supports the press cushion by means of the spring 43, engaging the cam disc 6 through the roller 10. The parts 8 and 9 'are held in their operative position by the bell crank levers 17 and 17 during a complete revolution of the shaft 1, their bottom ends being brought by fixed

stops

35 and 35 out of engagement with the slides 13 and 12 so that the finished shoe may be removed and another shoe introduced.

Though the invention is described and illustratedin connection with a press of the rotary type, it is obvious that it may be employed equally well with a gluing press which comprises a travelling chain or consists of only a single press.

What I claim is: A

1. In a machine for the manufacture of glued shoes, a movable carrier, a plurality of devices for pressing the sole to the lasted shoe on the carrier and a bag filled with a pressure medium having an electric heating pad in every device.

2. In a machine for the manufacture of glued shoes, a rotatable carrier, a plurality of devices for pressing the sole to the lasted shoe, a pressing cushion in every device, an inflatable pressing bag and an electric heating pad in every device, and an electric switch common to all ads.

3. In a mac ine for the manufacture of glued shoes, a rotatable carrier, a plurality of devices for pressing the sole to the lasted shoe, a pressing cushion in every device, an inatable pressing bag and an electric heating pad in every device, electric ducts leading from the pads to insulated contact rings rotating with the said carrier, a stationary electric switch common to all pads, and spring pressed contacts within the switch slidin on the said contact rings.

4. Ih a machine for the manufacture of glued shoes, a rotatable carrier, a plurality of devices for pressing the sole to the lasted shoe, a pressing cushion in every devicean inflatable pressing bag and an electric heating pad in every device, common to all pads, electric ducts leading from every pad to a separate plug, a plugsocket for all plugs rotating-with the carrier, and electric ducts leading from the plug-socket to the said switch.

5. In a machine for the manufacture of glued shoes, of devices for pressing the sole to the lasted shoe, a pressing cushion in every device, an inflatable pressing bag and an electric heatglued shoes,

a rotatable carrier, a pluralitying pad in every device, electric resistance coils in every pad, and an electric switch adapted to cut-out selectively and to diferently connect these coils.

6. In a machine for glued shoes, a rotatable carrier, a plurality of pressing devices on the carrier, every device having a metal pan, a constantly inflated bag enclosed on all sides by the an except the side supporting the shoe, an e ectrically heated pad on the said shoe-supporting side of the ba ,and a protective cover on the pad held in p ace by engaging by a bead with a groove under a iange of the pan.

7. In a machine for the manufacture of glued shoes a shoe press comprising means for sustaining a cushion consisting of a fluid pressure bag land of an electrically-heated pad, and cooperating means for pressin a shoe against asole positioned on said pa 8. In a machine for the manufacture of glued shoes, a cushion consisting of a pressure bag, an electrically heated pad on the bag, and `of a protecting cover on the pad, and

'mea-ns for pressing a sole positioned on the said cover against the bottom of a lasted shoe.

9. In a machine for the manufacture of a cushion consisting of a pressure ba and of an electrically heated pad, means or pressing a sole positioned on the electrically heated pad against the bottom of a lasted shoe, and heating cords arranged crosswise in the part of the pad destined for the ball and arranged lengthwise in the plart of the pad destined for the joint of the s oe.

In testimony whereof I aix my signature.

HEINRICH WALTHER.

an electric switch