US3254198A

US3254198A - Cement activating machines

Info

Publication number: US3254198A
Application number: US352443A
Authority: US
Inventors: Jack A Card
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1964-03-17
Filing date: 1964-03-17
Publication date: 1966-05-31
Anticipated expiration: 1983-05-31
Also published as: DE1510042A1

Description

J. A; CARD 3,254,198

CEMENT ACTIVATING MACHINES May 31, 1966 4 Sheets-Sheet 1 Filed March 17, 1964 2 15Z Inventor 2 Jbck A. Card \ll/ By hz'sAttorney Wd% i May 31, 1966 J. A. CARD CEMENT ACTIVATING MACHINES 4 Sheets-Sheet 2 Filed Ma. 17, 1964 I My 31, 1966 J. A. CARD CEMENT ACTIVATING MACHINES 4 Sheets-Sheet 5 Filed March 17, 1964 I l I I :1.mmmmnmiiii:...:.:.ik YL ,@V 2% United States Patent 3,254,198 CEMENT ACTIVATING MACHINES Jack A. Card, Beverly, Mass, assignor to United Shoe Machinery Corporation, Boston, Mass, a corporation of New Jersey Filed Mar. 17, 1964, Ser. No. 352,443 7 Claims. (Cl. 219-215) The present invention relates to apparatus for heating shoe parts and, more particularly, to a machine for heating an outsole and a shoe bottom prior to the attachment of the outsole to the bottom and for activating, by the application of heat, adhesive which has been applied to the outsole thereby to prepare the shoe bottom and outsole for adhesive joinder. The apparatus disclosed hereinafter is generally of the type illustrated and described in a pending application Serial No. 325,263, filed November 21, 1963, in the name of the present inventor, the subject invention constituting an improvement in the apparatus of said pending application.

One commercial process employed in the manufacture of shoes for attaching an outsole and a shoe bottom comprises the steps of forming a substantially solvent free ribbon of thermoplastic synthetic polymer resin adhesive by depositing the adhesive in molten condition upon marginal surface portions of the outsole, cooling the ribbon to render it self-supporting, subsequently heating the ribbon and the portions of the outsole underlying it to restore the adhesive to molten condition and to prepare the underlying solearea for permanent adhesive attachment and concurrently heating the bottom portion of the shoe to which the outsole is to be attached. The shoe bottom and outsole are then brought together with the of work obtainable. My prior invention also contemplates the provision of means for attaining uniformity of outsole and shoe bottom exposure and for establishment of an expeditious cycle of operation which was relatively undemanding on the operator. However, the apparatus of the referenced application requires that the operator manually activate the feed means associated with a particular tray to be employed. The appropriate feed means has to be rendered operative by the manual depression of a lever handle each time a tray was utilized in the cycle of operation. When considered singularly, the act of depression constitutes a minimal amount of physical effort and consumed but a short interval of time. However, in the aggregate, this act multiplies the tediousness and monotony of the operation of the apparatus and, therefore, provides a potential source of error. That is, the demand placed upon the operator for high production often results in his failure to depress the lever handle in his haste to achieve a designated production quota. The end effect is the description of the cycle of operation set for the machine operator and a consequent loss of time and production. A collateral problem to the above is that the operator is connnonly found to depress the ribbon of molten adhesive between them and pressure applied to force the adhesive into permanent attaching relationship with the heated surfaces of both the outsole and the shoe bottom. The adhesive thereafter is solidified by cooling. A more detailed analysis of the above process is delineated in application for United States Letters Patent, Serial No. 121,118, filed June 30, 1961, in the name of Conrad Rossitto now US. Patent No. 3,168,754. The present invention is concerned with apparatus for activating or heating the adhesive ribbon to restore it to molten condition and heating the outsole and shoe bottom.

Prior to the development of both the apparatus of the present invention and that described in my above-refer enced pending application, machines utilized for this purpose required an operator to introduce both the outsole and the shoe bottom manually to the heating elements of the machine. This was normally accomplished by placing an outsole in a receptacle and physically moving the receptacle into a position where the outsole was exposed to the heating elements. This was not only physically taxing on the operator but also time consuming. The operator was additionally required to position the shoe upper accurately in location on the machine to subject its bottom to the heating means. The result of requiring an operator to perform the plurality of tasks stated above was an inability on the partof the operator consistently to attain continuity in the amount of heat transferred to the two members and, therefore, the cement. The consequence of such lack of continuity was an inconsistency in the quality of adhesive bonds produced. Frequently, the operator was also concurrently required physically to press the shoe bottom and upper into adhesive contact, thus, further reducing his effectiveness and efiiciency.

A machine produced in accordance with the teachings of the invention described in my aforereferenced pending application relieves the operator of a number of the tasks enumerated in the preceding paragraph and, thus, results in a marked improvement in the quality and continuity v lever handle an inefficient amount to effectuate its positioning in operative relation to the associated instrumentalities of the machine. The root of this error can be again exposed as the haste of the operator to achieve prescribed production quotas. Ergo, an improvement in the apparatus whereby the operator is freed from this task was wanting.

Accordingly, an object of the present invention is to provide a cement activating apparatus having means for automatically introducing shoe outsoles to a heating element in the apparatus and means for automatically extracting the outsoles therefrom.

Another, and more specific object of this invention, is to provide operating mechanism for a plurality of discrete, movable trays for introducing shoe outsoles to and extracting shoe outsoles from a heating element for automatically and sequentially introducing said trays to said heating elements.

To this end and in accordance with a feature of the present invention, there is'provided apparatus for heating a shoe bottom and an outsole and for activating adhesive on said outsole comprising heating means and conveying means for moving the outsole relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, carrier means movable between an outer position and an inner heating position, pivotal pawls mounted on the carrier means, said pawls being engageable with means secured to said trays to convey the trays into exposed relation to said heating means, cam means rotatably mounted in said carrier means for sequentially positioning the pawls in location to convey the trays associated therewith, indexing means cooperative with the cam means to index the cam means each time the carrier means completes a cycle of movement and drive means for imparting movement to said carrier means.

The above and other features of the invention including various nove'l details of construction and combinations of parts will now be more particularly described with reference to the accompanying drawings and pointed out in the claims. It will be understood that the particular machine embodying the invention is shown by way of illustration only and not as a limitation of the invention. The principles and features of this invention may be employed in varied and numerous embodiments without departing from the scope of the invention.

In the drawings:

FIG. 1 is a pictorial perspective view of a machine embodying the invention;

FIG. 2 is a front view of the conveyor means of the machine, certain members having been removed for clary;

FIG. 3 is a side elevation, partly in section, with parts broken away of a portion of the conveyor means;

FIG. 4 is a partial plan view, with certain members broken away, of the cam means, pawl carrier and indexing means in the outer loading position;

FIG. 5 is a partial plan view similar to FIG. 4 but at a point when the pawl carrier is removed from the outer loading position;

FIG. 6 is a side elevation of the mechanism illustrated in FIG. 4;

with its bottom surface exposed to the heating elements 10. As hereinafter described, outsoles are introduced to and extracted from exposure to the heating elements 12 of the machine by conveyor means, generally indicated in FIG. 1 by the reference character 20. The novelty of the subject invention resides in the conveyor means 20, the apparatus appurtenant thereto, and the interrelation thereof with the heating means 10 and 12.

The conveyor means 20, best seen in FIGS. 2 and 3, comprises discrete

sole conveying trays

22, 22 each of which is movable between an outer, sole loading position and an inner heating position wherein a sole conveyed thereby is in exposed relation to the heating means 12. The

trays

22, 22 are mounted for sliding movement by rolls 24 carried by brackets 26 mounted on the lower surfaces of the trays, a plurality of said rolls being positioned along each side of the

trays

22, 22. The rolls 24 are rotatively supported in guideways 28 positioned both along the sides of the conveyor means and in its upper central portion. As illustrated in FIG. 2, those guideways 28 which are positioned along the sides are mounted on the frame 30 of the conveyor means 20. However, the centrally located guideways 28 are mounted on a bracket 32 affixed to a raised inverted U-shaped extension 34 of an elongated, bifurcated bracket 36 located in the rear of the apparatus. An outer loading position for the

trays

22, 22 is determined by Contact thereof with

stops

46, 46 located on the front of the frame 30.

The

sole trays

22, 22 are sequentially conveyed between the outer, loading position and the inner, heating position by the cooperative action of the pawl carrier 50, indexing means 52, cam means 54 and drive means 56, as hereinafter described.

The drive means 56 which is employed to move the pawl carrier 50 and trays 22, 22, as hereinafter described, comprises a drive cylinder 60 having a piston 62 slidable therein, connected to the piston 62 is a drive rod 64 which extends outwardly from the rearward end of the cylinder, as best illustrated in FIG. 3. The end of the drive rod 64 remote from the piston 62 is received in a rotative mount 66 to ensure axial alignment within the cylinder 60. The mount 66 is rotatively mounted between

brackets

68, 68 secured to the rearward end of the pawl carrier 50, shown in section in FIG. 3, by

fulcrum members

70, 70 affixed to the lower portion of the

brackets

68, 68 and extending outwardly therefrom into apertures located in opposite sides of the mount 66. The forward end (right hand as viewed in FIG. 3) of the drive cylinder 60 is pivotally mounted on the frame 30 of the conveyor means by brackets '72, 72, a stud 74 mounted between said brackets, and an extension member 76 pivotally mounted on the stud 74 and secured to the forward end 1 of the drive cylinder 60. Pressure fluid is introduced to and vented from the drive cylinder 60 through the piping ports 78 and 81) located on opposite ends thereof.

The pawl carrier 50 is employed to transmit the movement of the drive means 56 selectively to the

trays

22, 22. Sliding movement is imparted to the pawl carrier 50 by the drive cylinder 60 through the

brackets

68, 68. The sliding movement of the pawl carrier 50 is utilized selectively to impart linear sliding translation to the

sole trays

22, 22 by means of

pivotal pawls

82, 82 and a 1 return bar 84 engageable with

studs

86, 86 extending outwardly from generally U-shaped (FIG. 2)

brackets

88, 88 depending from the

sole trays

22,22 as hereinafter described. The return bar 84 is secured to the upper surface of the pawl carrier 50 and comprises

spaced legs

89, 89 extending essentially downwardly from the pawl carrier, one in front of each of the studs 86.

The pawl carrier 54) is mounted for sliding movement between an inner and an outer position by a plurality of rolls 90 mounted on the lower portion of the legs thereof. The rolls 90 are rotatively supported in

guideways

92, 92 disposed on opposite sides of the drive cylinder 68 and secured to the frame 30 of the conveyor means by the elongated, bifurcated bracket 36, as illustrated in FIGS. 2 and 3.

The

pawls

82, 82 are sequentially positioned for engagement with the

studs

86, 86, respectively, associated with the

sole trays

22, 22 thereby to translate the ingress movement of the pawl carrier 50 to said trays whereby the trays are alternatively fed into heating relationship with respect to the heating element 12. As best illustrated in FIGS. 2 and 3, the

pawls

82, 82 are pivotally mounted on opposite ends of a shaft 96 rotatively mounted on an extension member 98 afiixed to the pawl carrier 50. The

pawls

82, 82 are normally biased upwardly by springs 10!), 100 positioned on the shaft 96 and extending under

pins

102, 102 mounted on the

pawls

82, 82 to urge the pawls into an upper position. The

pins

102, 102 extend outwardly from the

pawls

82, 82 through holes 104 in the pawl carrier extension member 98 and under the cam means 54. Indicating

tabs

106, 106 aflixed to the

pawls

82, 82 and extending outwardly therefrom through the face plate 108 of the apparatus designate the position of the pawls to the operator. That is, each tab 106 is pivoted with its associated pawl 82 and, thus, by examination of the

tabs

106, 106 the operator can readily ascertain which tray will be moved at the next stroke of the drive means 56.

The sequential positioning of the

pawls

82, 82 in engaging relationship with the

studs

86, 86 is accomplished by the cooperative action of the cam means 54 and the indexing means 52. The cam means or selector means 54 comprises a camming member 110 the lower cam surface of which is engageable with the

pins

102, 102 whereby rotative movement thereof functions to position the

pawls

82, 82. As best illustrated in FIGS. 2 and 6, the cam means or selector means 54 is rotatively mounted in the extension member 98. The camming member 110 is located below the extension member 88 and is integral with an upper progression member 112 rotatively sup ported on the upper surface of said extension member. The progression member 112 has a plurality of upstanding studs or extension members 114 circumferentially spaced therearound which cooperate with the indexing means 52 to rotate the camming means a predetermined interval every time the pawl carrier 50 completes a cycle, as hereinafter described.

The bottom or cam surface 111 of the camming member 110 has formed in it a series of alternating slots 113. When a slot 113 is alined with one of the pins 102 an unslotted portion of the bottom surface 111 is alined with the other pin 162. The bottom or cam surface 11] urges the

pins

102, 102 downwardly against the action of the

springs

100, 100 thereby to position the

pawls

82, 82 in a lower position displaced from the

studs

86, 86.

The slots permit the

pins

102, 102 to move upwardly under the action of the

springs

100, 100 to locate the

pawls

82, 82 in operative relation to the

studs

86, 86. Ergo, as a result of the cam design. described above, each time the cam means is indexed one interval, the relative position of the

pawls

82, 82 is reversed. That is, the

pawls

82, 82 are sequentially pivoted into engaging relation to the

studs

88, 88 respectively, by the controlled indexing of the cam means 54.

As stated above, the indexing means 52 cooperates with the studs 114 to index or rotate the cam means 54 a predetermined interval each time the carrier completes a cycle of movement, i.e. moves from the outer position to the inner position and returns. The indexing means 52 is secured to the bracket 32 in a position whereby it is immediately above the cam means 54 when the pawl carrier 50 is in the outer, loading position. As best illustrated in FIGS. 2 and 6, the indexing means 52 comprises an indexing member 120 engageable with the studs 114 in a manner to be described hereinafter. The indexing member 120 is movable laterally in a channel 122 provided in the cross-piece 124 of a T shaped mounting member 125, secured to the bracket 32. Spacers 126 are provided between the bracket 32 and the cross-piece 124. The indexing member 120 is mounted on the end of a shaft 128 and is normally urged toward the inner face of the channel 122 by a spring 130 interposed between a counterbored surface in the cylindrical leg 132 of the T-shaped member 125 and a piston 134 aflixed to the shaft 128. The piston is housed within the cylindrical member 132 which extends outwardly from the crosspiece 124 through the bracket 36. An annular member 136, FIG. 2, made of rubber or the like is mounted on the shaft 128 abutting the indexing member 120 to prevent contact between the member 120 and inner face of the channel 122. Y

The cooperation of the indexing means 52, selector means 54,

pawls

82, 82 and pawl carrier 50 will now be described with reference to FIGS. 4 to 7. FIGS. 4 and 6 show the relative location of the studs or extension members 114 and indexing member 120 when the pawl carrier 50 is in an outer or loading position, it being clearly understood that these figures are illustrative of but one position of the selector means 54 and, therefore, the

studs 114. The indexing member 120 is maintained in an outer position in the channel 122 substantially displaced from the inner face thereof against the action of the spring 130 by the studs 114 (A and B). The

tabs

106, 106 indicate that the right hand pin 102 is located in a slot 113 in the cam surface 111 of the cam member 110 and that the left hand pin 102 is in contact with a flat portion of the surface 111. Thus, as seen in FIG. 6, the right hand pawl 82 is pivoted upwardly in position to engage its associated stud 86 whereby the right hand tray 22 will be fed into the heating position when the pawl carrier 50 is moved inwardly. The left hand pawl 82 is in the lowered position and, therefore, will pass under the stud 86 associated therewith when the pawl carrier 50 is fed inwardly. The left hand tray will thus remain in the outer, loading position during the next cycle of movement of the pawl carrier 50.

When the pawl carrier 50 and cam means 54 mounted on the extension member 98 attached thereto are moved inwardly, the studs 114 (A and B) are removed from contact with the indexing member 120. The indexing member 120 is thereafter urged toward the inner face of the channel 122 under the action of the spring 130. The selector means 54 is maintained in the position established by the action of the studs 114 (A and B) and indexing member 120 by a lever 140 pivotally mounted on the pawl carrier 50 (see also FIG. 3). The lever 140 is receivable within one of a plurality of slots 142 circumferentially distributed about the progression member 112. A spring 144, opposite ends of which are connected to the lever 140 and a bracket 146 secured to the extension member 98 normally urges the forward end of the lever member 140 into one of the slots 142, the specific slot being determined by the position to which the cam means 54 is rotated. The position of the cam means 54 established by the studs 114 is thus maintained by the engagement of the end of the lever 140 with the essentially L-shaped slot 142.

The pawl carrier 50 is thereafter fed into the heating position and retained there for a predetermined period with the selector means 54 and, thus, the

pawls

82, 82 in the positions described above. When the heating has been completed, the pawl carrier 50 and selector means 54 thereon are removed from the heating position by the drive means 56. The right hand sole tray 22 is removed from the inner heating position by the leg 89 of the return bar 84 associated therewith which contacts the pin 86 and translates the egress movement of the pawl carrier 50 thereto. As illustrated in FIGS. 3 and 4, the return bar 84 is positioned on the pawl carrier 50 so that the

legs

89, 89 are located in front of the

pins

86, 86 whereby one of the legs 89 will always contact the pin 86 associated with the sole tray 22 which is in an inner position during the retraction of the pawl carrier 50.

As illustrated in FIGS. 5 and 7, the cam means 54 is indexed or rotated by engagement of the stud 114(A) with -the indexing means 120 during the egress of the pawl carrier 50. The indexing means 120, which was urged toward the inner face of the channel 122 when the cam means 54 was removed from contact therewith, is initially engaged by the stud 114(A) with the studs 114(A and B) in the same positions as at the time of removal illustrated in FIG. 4, see FIG. 5. Further egress movement of the pawl carrier 50 and the cam means or selector means 54, causes the selector means 54 to be rotated as its vertical axis moves transversely of the indexing means 52. That is, the stud 114(A) is maintained in an essentially fixed position abutting the indexing member 120 while the remainder of the selector means 54 continues.

the egress movement. The selector means 54 is thus pivoted at the point of engagement of the stud 114(A) and indexing member 120, the pivotal or rotative movement being about the vertical axis of the selector means 54. FIG. 7 illustrates the relative positions of the indexing member 120 and the studs 114(A and F) at a point in the egress movement subsequent to that shown in FIG. 5. The rotative movement imparted to selector means 54 has pivoted the stud 114(F) into engagement with the indexing member 120. Furthermore, the stud 114(F) hasurged the indexing member 120 outwardly from the inner face of the channel 122 against the action of the spring 130. The stud 114(A) has thus moved along the side of the indexing member 120 in the direction of the face thereof adjacent the inner face of the channel 122.

Further egress movement of the pawl carrier 50 into the outer, loading position causes the stud 114(F) to urge the indexing member outwardly to the position illustrated in FIG. 4. The selector means 54 is further rotated until the stud 114(A) slides out of engagement with the side of the indexing member 120. The stud 114(A) is thereafter moved along the face of the indexing member 120 due to the movement of the pawl carrier 50 and selector means 54 thereon into the outer position. When the pawl carrier 50 is located in the outer or loading position the studs 114 (A and F) are in positions which correspond to the location of the studs 114(B and A), respectively,

illustrated in FIG. 4.

' The selector means54 has thus been indexed a prein contact with a fiat portion of the cam surface 111 of the cam and the left hand pin 102 will be in a slot 113 when the studs 114(A and F) are in engagement with the indexing member 120 in the outer, loading position. The right hand pawl 82 will be pivoted downwardly and the left hand pawl 82 will be in the upper position.

The next stroke of the pawl carrier 50 will therefore carry the left hand tray 22 into the heating position. The selector means 54 will be maintained in the indexed position by the lever 140 which has slid along the circumference of the progression member 112 and been received in a slot 142. The return of the pawl carrier 50 will index the cam means 54 in the manner described above whereby the studs 114(F and B) will engage the indexing member 120 and the right hand pawl 82 will again be raised and the left hand pawl lowered.

Means have thus been provided whereby the

sole trays

22, 22 are sequentially conveyed into the heating position automatically. The operator need only load the sole tray 22 located in the outer position and await the return of the other tray 22 to repeat the operation. When the two trays are in the outer position, the operator can readily ascertain which tray will be introduced to the heating means 12 next by examiningthe position of the

tabs

106, 106. The operator has been relieved of a monotonous task and the efliciency and continuity of machine operation ensured.

In operation of the conveyor means 20, an outsole to be heated is placed on the tray 22 with the associated tab 106 located in the depressed position. A timer 150 (FIG. 1) is employed to control the introduction and release of pressurized fluid in the cylinder 60 to drive the pawl carrier 50 into the inner heating position. When the operator has located an outsole in position on one of the trays 22, depression of a foot treadle 152 activates the timer 150 which has been previously set to actuate the cylinder 50 after a predetermined time interval by the operator. Upon the elapse of the selected time interval, pressure fluid is introduced to the cylinder 60 through the piping port 80 thereby causing the ingress of the pawl carrier 50 and, consequently, the tray 22 associated with the tab 106 which has been depressed.

A timer 158 is employed to regulate the duration of exposure of an outsole to the heating elements 12. Upon the expiration of a selected time interval previously set on the timer 158 by the operator, pressure fluid is introduced to the cylinder 60 through the piping port 78 to return the pawl carrier 50 to the outer, loading position.

As discussed above, the sole trays 22 are returned to the outer or loading position by the return bar 84, the associated legs 90 of which contact the studs 86. The pivotal mounting of the pawls 82 permits them to pass under the stud 86 associated with the sole tray 22 located in the outer or loading position during the egress of the pawl carrier 50 thereby to locate the pawls 82 in position to engage the studs 86 to impart movement to the trays 22.

In the preferred embodiment of the subject invention, locating means 160 are provided to accommodate and support a heel attached to an outsole to be introduced to the heating elements 12. In the machine of the above referenced disclosure, an integral heel and sole unit could not be accommodated on the sole tray. The ability to do so lends flexibility to the assembly procedure.

As illustrated in FIGS. 2 and 8, the locating means 168 are mounted on the bases of the U-shaped members 88 which depend from the sole trays 22. The locating means 160 are positioned rearwardly of the portion of the trays 22 which support the soles whereby a heel attached to a sole placed on said support unit will extend therebelow and will be accommodated and supported in the locating means 160, see FIG. 1.

The locating means 160 comprises a pivotal locating member 162 which may be positioned to receive and locate heels of varying sizes and shapes. The location of the heel in the locating means thus establishes the proper positioning of a sole and heel unit on the trays. The members 162 comprise fulcrum members 164 having bifurcated, generally H-shaped support members 166 secured thereto. The fulcrum members 164 comprise spaced

members

167, 167 pivotally mounted on channelled mounting members 168 by studs 170. The mounting members 168 are aflixed to the base of the

U-shaped brackets

88, 88.

Pivotal movement is imparted to the locating members 162 by screws 172 having slides 174 threaded thereon. The slides 174 have studs 176 mounted therein which are slidingly received in slots .178 in the spaced

members

167, 167 of the fulcrum members 164. Each of the screws 172 is rotatively mounted in a block 188 located in the channel of the mounting member 168. Translation of the screw 172 is prevented by

stops

182, 182 positioned on opposite sides of the block 168. Thus, rotation of the screw 172 imparts rectilinear motion to the slide 174. Rectilinear movement of the slide 174 produces sliding movement of the stud 176 in the slot 178 thereby imparting pivotal movement to the locating member 162 about the stud 170. A handle 186 is provided to rotate the screw 172.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. A shoe machine for heating a shoe part comprising heating means and conveying means for moving the shoe part relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, carrier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means, each of said pawls being engageable with means secured to a tray to convey the tray into a heating position in exposed relation to said heating means, selector means rotatively mounted on said carrier means, said selector means comprising a cam member for sequentially locating the pawls in position to convey their associated trays, indexing means cooperative with the selector means to index the cam member each time the carrier means completes a cycle of movement, and drive means for imparting movement to said carrier means,

2. A shoe machine for heating a. shoe part comprising heating means and conveying means for moving the shoe part relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, carrier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means for movement between an inactive position and an operative position, each of said pawls being engage able in the operative position with means associated with a tray to convey the tray into exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for sequentially reversing the positions of the pawls each time the selector means is indexed and a progression mem-' ber, indexing means cooperative with the progression member to index the cam member each time the carrier means completes a cycle of movement whereby the trays will be alternately introduced to the heating means, and drive means for imparting movement to the carrier means.

3. A shoe machine for heating a shoe part comprising heating means and conveying means for moving the shoepart relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, carrier means movable between an outer position and an inner position, pivotal pawls mounted on thecar-rier means for movement between an inactive position and an operative position, each of said pawls being engageable in the operative position with means appurtenant to a tray to convey the tray into exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for alternately locating the respective pawls in operative position each time the selector means is indexed and a progression member having a plurality of extension members, indexing means cooperative with the progression member to index the selector means each time the carrier means completes a cycle of movement, said indexing means comprising an indexing member engageable with the extension members during egress movement of the pawl carrier, and drive means for imparting movement to the car-rier means.

4. A shoe machine for heating a shoe part comprising heating means and conveying means for moving the shoe part relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, carrier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means for movement between an inactive position and an operative position, each of said pawls being engageable in the operative position with means associated with a tray to convey the tray int-o exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for se quentially reversing the positions of the pawls each time the selector means is indexed and a progression member having a plurality of extension members, indexing means cooperative with the progression member to index the selector means each time the carrier means completes a cycle of movement, said indexing means comprising a movable indexing member engageable with a plurality of the extension members when the carrier means is in the outer position to establish an indexed position for the selector means and means for moving the indexing member into an indexing position when the carrier means is removed from the outer position whereby the indexing member will engage an extension member during the egress movement of the carrier means thereby to index the selector means, said indexing means being urged out of the indexing position by an extension member during the egress movement of the carrier means, and drive means for imparting movement to the car-rier means.

5. A shoe machine for heating a shoe part comprising heating means and conveying means for moving the shoe part relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, car-rier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means for movement between an inactive position and an operative position, each of said pawls being engageable in the operative position with means associated with a tray to convey the tray into exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for sequentially reversing the positions of the pawls each time.

the selector means is indexed and a progression member having a plurality of extension members, indexing means cooperative with the progression member-to index the selector means each time the carrier means completes a cycle of movement, said indexing means comprising a movable indexing member engageable with a plurality of the extension members when the carrier means is in the outer position to establish an indexed position for the selector means and means for moving the indexing member into an indexing position when the carrier means is removed from the outer position whereby the indexing member will engage an extension member during the egress movement of the carrier means thereby to index the selector means, said indexing means being urged out of the indexing position by an extension member during the egress movement of the carrier means, means for retaining the cam means in an indexed positron during a portion of the cycle of movement of the pawl carrier,

and drive means for imparting movement to the carrier means. I

6. A shoe machine for heating an outsole and for activating adhesive thereon comprising heating means and conveying means for moving the outsole relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, means associated with the trays to accommodate and position a heel depending from the outsole, carrier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means for movement between an inactive position and an operative position, each of said pawls being engageable in the operative position with means associated with a tray to convey the tray into exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for sequentially reversing the positions of the pawls each time the selector means is indexed and a progression member, indexing means cooperative with the progression member to index the cam member each time the carrier means completes a cycle of movement whereby the trays will be alternately introduced to the heating means, and drive means for imparting movement to the carrier means.

7. A shoe machine for heating an outsole and for activating adhesive thereon comprising heating means and conveying means for moving the outsole relative to the heating means, said conveying means comprising a plurality of discrete, movable trays, support means associated with said trays to accommodate and position a heel depending from the outsole, said support means being adjustable to accommodate heels of various sizes and shapes, carrier means movable between an outer position and an inner position, pivotal pawls mounted on the carrier means for movement between an inactive position and an upper operative position, each of said pawls being engageable in the operative position with means associated with a tray to convey the tray into exposed relation to said heating means, selector means on said carrier means, said selector means comprising a cam member for sequentially reversing the positions of the pawls each time the selector means is-indexed and a progression member having a plurality of extension members, indexing means cooperative with the progression member to index the selector means each time the carrier means completes a cycle of movement, said indexing means comprising a movable indexing member engageable with a plurality of the extension members when the carrier means is in the outer position to establish an indexed position for the selector means and means for moving the indexing member into an indexing position when the carrier means is removed from the outer position whereby the indexing member will engage an extension member during the egress movement of the carrier means thereby to index the selector means, said indexing means being urged out of the indexing position by an extension member during the egress movement of the carrier means, and drive means for imparting movement to the carrier means.

References Cited by the Examiner UNITED STATES PATENTS 2,813,502 11/1957 Drom 219- 2,946,637 7/1960 Becker 312-223 FOREIGN PATENTS 842,170 6/1952 Germany.

RICHARD M. WOOD, Primary Examiner.

C. L. ALBRITTON, Assistant Examiner.

Claims

1. A SHOE MACHINE FOR HEATING A SHOE PART COMPRISING HEAT MEANS AND CONVEYING MEANS FOR MOVING THE SHOE PART RELATIVE TO THE HEATING MEANS, SAID CONVEYING MEANS COMPRISING A PLURALITY OF DISCRETE, MOVABLE TRAYS, CARRIER MEANS MOVABLE BETWEEN AN OUTER POSITION AND AN INNER POSITION, PIVOTAL PAWLS MOUNTED ON THE CARRIER MEANS, EACH OF SAID PAWLS BEING ENGAGEABLE WITH MEANS SECURED TO A TRAY TO CONVEY THE TRAY INTO A HEATING POSITION IN EXPOSED RELATION TO SAID HEATING MEANS, SELECTOR MEANS ROTATIVELY MOUNTED ON SAID CARRIER MEANS, SAID SELECTOR MEANS COMPRISING A CAM MEMBER FOR SEQUENTIALLY LOCATING THE PAWLS IN POSITION TO CONVEY THEIR ASSOCIATED TRAYS, INDEXING MEANS COOPERATIVE WITH THE SELECTOR MEANS TO INDEX THE CAM MEMBER EACH TIME THE CARRIER MEANS COMPLETES A CYCLE OF MOVEMENT, AND DRIVE MEANS FOR IMPARTING MOVEMENT TO SAID CARRIER MEANS.