US2582464A

US2582464A - Apparatus for treating shoe soles

Info

Publication number: US2582464A
Application number: US151242A
Authority: US
Inventors: Edward F Small
Original assignee: Compo Shoe Machinery Corp
Current assignee: Compo Shoe Machinery Corp
Priority date: 1950-03-22
Filing date: 1950-03-22
Publication date: 1952-01-15
Anticipated expiration: 1969-01-15

Description

Jan. 15, 1952 E. F. SMALL 2,582,464

APPARATUS FOR TREATING SHOE SOLES Filed March 22, 1950 Patented Jan. 15, 1952 APPARATUS' FOR TREATING SHOE SOLES Edward F. Small, Newton, Mass., assignor to Compo Shoe Machinery Corporation, Boston, Mass., a. corporation of Delaware Application March 22, 1950, Serial No. 151,242

3 Claims. 1

This invention relates to apparatus for use in the manufacture of footwear and more particularly to an apparatus for heat-activating thermo-plastic cement applied to shoe soles to facilitate the attachment thereof to shoe bottoms.

An object of this invention is to provide a simple yet eective apparatus, which may be attached to or placed near a sole attaching machine, for heat-activating a coating of thermoplastic cement on shoe soles in a manner which allows the cement on the soles to be sub- Jected to a relatively high temperature to rapidly activate the cement and then allows the soles to be subjected to a lower temperature to keep the cement thereon in an activated condition until they are actually removed from the apparatus for attachment to shoe bottoms.

Another object of the invention is to provide apparatus, having an electric heater for heatactivating cement on shoe soles, with sole supports which are adapted to move in a straight line from a loading position removed from the heater to an activating position closely adjacent the heater.

A further object of the invention is to provide apparatus, having an electric heater for heatactivating cement on shoe soles, with a simple, yet convenient and effective timing device which, in conjunction with suitable sole supports, allows soles to be subjected to the relatively high temperature of the heater for a definite period of time to rapidly activate the cement upon the soles and which will thereafter automatically position the soles a distance away from the heater where the temperature is sufficient to maintain the cement upon the soles in an activated condition without burning the soles or destroying the adhesive qualities of the cement.

Other objects of the invention will in part be obvious and will in part appear hereinafter.

The invention accordingly comprises the features of construction, combination of elements, and arrangement ol parts, which will be exemplified in the construction hereinafter set forth and the scope of the invention will be indicated in the claims.

For a fuller understanding of the nature, features, and objects of the invention reference should be had tothe following detailed description taken in connection with the accompanying drawing, in which:

Fig. l is a plan view of the apparatus embodying features of my invention;

Fig. 2 is a side elevation, partly in section, of the apparatus of this invention; and

(Cl. 21S-19) Fig. 3 is a partial sectional view taken substantially along lines I-I of Fig. 1,

Referring to the drawings, the apparatus comprises a base or frame casting In from which extends side walls II supporting a chamber I2 having an opening I3 in its front side wall which provides access to the interior of the chamber.

An electric heating element I4 of grid like shape is secured by the screws I5 to bosses I6 depending from the top of the chamber I2 so that the element radiates heat downwardly. The terminals I'I of the heating element are adapted to be wired to any available electric supply source.

The sole supports I8 and I9, which may be in the form of a solid casting, perforated metal or wire screen, are secured to the rods 20 and 2I `which are slidably guided by the bores in

bosses

22 and 23 formed integral with the base casting I0 and the chamber I2, Thus, it can readily be seen that the sole supports can be moved in a straight line towards and away from the heating clement I4.

A lug 24 extending from the base casting I0 is provided with a T slot into which the block 25 is slidably tted and the screw 26 threaded into the block is provided with a portion 21 of reduced diameter which is journalled in the base casting I0. The knob 28 is secured to such portion 21 in a manner which allows the screw to be rotated and the height of the block 25 to be varied.

The horizontally extending boss 29 on the block 25 has a bore into which is pressed the shaft 30 so that it extends equally from each end of the boss. The lever 3| is pivotally mounted upon one end of the shaft and a similar lever 32 is pivotally mounted upon the other end of the shaft, the

collars

33 and 34 serving to maintain the levers in axial position upon the shaft.

The slots 35 and 36 in the respective levers 3| and 32 t over the

pins

31 and 38 which extend from the rods 20 and 2I and when the levers are lifted by the handles 39 formed thereon the rods and the sole supports are elevated.

As best shown in Figs. 1 and 3, mechanism is provided for maintaining the sole supports I8 and I9 in a position near the heater I4 for a definite period of time once they have been elevated by means of the handles 39 on the levers 3i and 32. rThis mechanism comprises a shaft 4i] which is journalled in the brackets 4I and 42 which extend from the base casting I0. A pulley 63 is secured to one end of the shaft and is adapted to be belted to a motor1 (not shown) so that the shaft is constantly rotated. The friction discs 44 and l5 are slidably mounted upon the shaft and are rotatable with the shaft by their driving connection with the key i6 secured to the shaft. The cam discs 4l and 48 are rotatably mounted upon the shaft while the friction discs 4S and 5e are secured to the shaft by set screws 5l and 52. The spring 53 surrounding the hubs of discs lift and serves to press the discs into engagement with the side faces of the cam discs so that the cams are rotated by virtue of their frictional engagement with the positively rotated friction discs.

The cam discs @l and t8 have depressions 54 and 55 formed in their peripheral surfaces and these depressions are adapted to engage the rolls 56 and 51 on the arms 58 and 52 which are pivoted at 6G to the levers 3l and 32.

The

arms

52 and 59 are biased by springs 5I and G2 against stops (53 and Bti formed on the levers 3l and 22. Stops t5 and E6 serve to limit movement of the arms when the rolls carried by the arms engage the cam depressions.

As viewed in Fig. 2, the shaft Il@ is rotated in a clockwise direction and in normal operation of the apparatus described a sole S entered into the chamber l2 via the opening i3 and is placed upon a sole support it and the operator lifts the lever 32 by its handle 3Q thus moving the sole support and the sole thereon to a position near the heater i4 (sole support it is shown in this elevated position). When the lever 32 is lifted high enough for the cam roll 5E to clear the cam depression 54 the arm 558 is pulled by the spring 62 against the stop E4 which allows the cam roll to rest upon the periphery of the cam disc 38. The cam now rotates due to its frictional engagement with the friction discs il and 53 thus keeping the lever 32 and the sole support IS in an elevated position until the cam disc has rotated one revolution whereupon the cam roll rides into the depression 54 and allows the sole support to be lowered. As the cam r-oll is contacted by the straight face of the cam depression the arm 58 is moved against the stop B55 and the cam disc is prevented from rotation until the lever is again lifted by the operator.

Each sole support is operated alternately in the manner above described to position a sole placed thereon in definite position near the heater for a definite period of time and then lowered to a position away from the heatei` where the temperature is sufficient to keep the cement upon the sole in an activated condition until it is removed for attachment to a shoe bottom.

To compensate for great variance in the thickness of shoe soles; e. g., when platform soles are used. the position of the sole supports with respect to the heater I4 may be adjusted by merely turning the knob 2f: to raise or lower the block 25 and consequently the sole supports.

Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it intended that all matter contained in the above description or shown in the accompanying drawing shall be interpreted as illustrative and not in a limiting sense.

It is also to be understood that the following claims are intended to cover all of 'the generic and specific features of the invention herein described, and all statements of the scope of the inventicn which, as a matter of language, might be said to fall therebetween.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. Apparatus for heat activating thermoplastic cement on shoe soles comprising a chamber, an electric heater Within said chamber, said heater being arranged to radiate heat downwardly, a moveable sole support located within said chambei' below said heater, manually operated means for moving said support towards said heater, and means including a power operated cam for maintaining said support in a position near said heater for a definite period of time and for thereafter allowing return of said support to a position located a fixed distance away from said heater.

2. Apparatus for heat activating thermoplastic cement on shoe soles comprising a frame, a chamber supported by said frame, an electric heater located within said chamber, said heater being arranged to radiate heat downwardly, a moveable solo support located within said chamber below said heater, means guiding said sole support for straight line motion towards and away from said heater, a rotatable cam, means for rotating said cam, means dependent upon movement of said sole support towards said heater to allow said rotating means to become operative, and means including said cam for maintaining said sole support in a position neal said heater for a definite period of time, for allowing said sole support to move away from said heater after lapse of said definite period of time and for making said rotating means inoperative.

3. Apparatus for heat activating thermoplastic cement on shoe soles comprising a frame, a chamber supported by said frame, an electric heater located within said chamber, said heater being arranged to radiate heat downwardly, a moveable sole support located within said chamber below said heater, means guiding said sole support for straight line motion towards and away from said heater, a lever, means pivoting said lever to said frame, connections between said lever and said sole support whereby movement of said lever moves said sole support, a rotatable cam, frictional means for rotating said cam, a depression in the periphery of said cam, an arm pivoted upon said lever, a cam follower mounted upon said arm, a handle associated with said sole support for moving it to a position near said heater, and means dependent upon lifting of said sole support for allowing said arm to move said cam follower out of said depression to allow said cam to rotate and to maintain said sole support in the position near said heater until said cam follower rides into said depression to lower said sole support and to arrest rotation of said cam.

EDNARD F. SMALL.

REFERENCES CITED I The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 720,024 Hammond Feb. 10, 1903 1,124,566 Wescott Jan. 12, 1915 1,824,310 Thompson Sept. 22, 1931 1,59,935 Shroyer May 22, 1934 2,290,356 Reinhold July 21, 1942