1. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a rotor, means for effecting repeated intermittent rotation of the rotor, means for effecting movement of the rotor from one level to another, a mold on the rotor, and drive means for effecting the aforesaid movement to carry said mold from one station to the next while at one level and for effecting movement from the one level to the other during the interval between movements from one station to the next, said drive means comprising a motor, a drive shaft, rotation of which effects rotation of the rotor, a driving connection between the motor and the drive shaft which includes a clutch rotatable in one direction to effect movement of the rotor toward the next station in the succession of stations, switch means operable as the rotor approaches said next station but prior to reaching said station to render the motor ineffective so that the rotor slows to a stop, and means for limiting rotation of the clutch following operation of the switch.

2. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a base, a rotor mounted on the base for rotation about a vertical axis and for vertical movement from one level to another, means for effecting intermittent rotation of the rotor about said vertical axis, means for effecting vertical movement of the rotor from one level to another, a mold on the rotor, and driving means for effecting the aforesaid movement, said driving means comprising a motor, a drive shaft journaled on the base, a driving element on the drive shaft, said driving element having driving relation with the rotor, a driving connection between the motor and the drive shaft, said connection including a one-way clutch rotatable by said motor to move the rotor toward the next station of operation, a first switch operably associated with the driving connection to reverse the motor before the rotor reaches the next station of operation thereby rendering the clutch ineffective, a locking element on the base movable into engagement with the rotor to prevent rotation of the rotor relative to the base, and a second switch operable by rotation of the rotor before the rotor reaches the next station of operation to initiate operation of the locking element.

3. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a base, a rotor mounted on the base for rotation about a vertical axis and for vertical movement from one level to another, a mold on the rotor, and means for driving the rotor to move the mold along a predetermined path relative to a plurality of stations located along said path at uniformly spaced intervals, comprising a first motor, a drive shaft connected to the rotor, means connecting the first motor to the drive shaft which includes a clutch rotatable in one direction to effect movement of the rotor toward the next station in the succession of stations, and switch means operable as the rotor approaches said next station but prior to reaching said station to render the motor ineffective, a second motor, a rotatable driving element connected to the second motor and rotatable thereby, means mounted on the base for converting the rotary movement of the rotatable drive element to vertical movement of the rotor, means connecting the second motor to said last means to effect vertical movement of the rotor, a brake on the rotatable driving element, and means operable by the rotor at its upper and lower levels to stop said motor and apply the brake.

5. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along the predetermined path, means at each statiOn for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation with a means at each station provided for operating on the mold at that station, and drive means for effecting intermittent lateral movement of the mold support and a mold carried thereby from one station to the next while the support is at the higher level and for effecting movement of the mold support and mold carried thereby from the higher level to the lower level and then back to the higher level during the interval between successive lateral movement, said means for effecting the lateral movement comprising power operable means, a drive shaft rotation of which will effect lateral movement of the mold support, a driving connection between the power operable means and said shaft, said power operable means being intermittently operable to effect movement of the mold support from station to station, a brake associated with the shaft operable to brake the mold support to a stop at each station and yieldable means embodied in the driving connection between the power operable means and the brake.

7. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a mold support movable along a predetermined path, molds mounted on said support, said support being movable vertically from one level to another during movement along said path, a plurality of stations situated along said path, and drive means for effecting intermittent lateral movement of the mold support and the molds carried thereby from one station to the next while the support is at the higher level, and for effecting vertical movement of the mold support and molds carried thereby from the higher level to the lower level and then back to the higher level during the interval between successive lateral movements, comprising means for initiating operation of said drive means to move the molds from station to station, means at the several stations operative while the molds are at the lower level to perform at least one operation thereon incident to the manufacture of the article, and means mounting the molds on the support for movement from station to station, comprising arms mounted on the support at intervals corresponding to the distance between stations of operation, said arms extending laterally outward from the support, a bracket rotatably mounted between each pair of arms, means on each bracket operable to clamp a mold thereto, a shaft mounted on one arm of each pair of arms, a driving connection between each shaft and one of the brackets, said shafts and driving connections being movable with the mold support in elevation, a drive shaft mounted on the base at one of the stations of operation, means at the end of each shaft and drive shaft interengageable by movement of the support to said lower level to connect each shaft in turn as it moves to said station to the drive shaft at the station, and means operable when the shaft is at said lower level to effect rotation of the drive shaft a predetermined amount.

12. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at that station, said means at the successive stations operating in succession to fill the mold with a thermosetting plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the inner surface of the mold, remove the ungelled plastic from the mold and partially cure said initial layer of gelled plastic, said means for applying heat to the exterior of the mold, following filling, comprising at one station a liquid bath into which the mold is thrust bottom down to submerge the mold substantially up to the level of the plastic interiorly thereof, and at the next station a gaseous heating medium into which the mold is thrust so that the gaseous heating medium rises upwardly along the sides of the mold.

13. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at that station, said means at the successive stations operating in succession to fill the mold with a thermosetting plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the inner surface of the mold, remove the ungelled plastisol from the mold and partially cure said gelled Layer, said means for removing ungelled plastisol from the mold comprising at one station means operable to invert the mold, means at the station where the mold is inverted for maintaining the mold inverted as it moves to the next station, and means at said next station for partially curing the layer of gelled plastic left in the inverted mold comprising banks of heating elements supported at said station above the level of the bottom of the inverted mold and at the back side thereof for partially curing the layer of gelled plastic while the mold is held inverted.

14. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at that station, said means at the successive stations operating in succession to fill the mold with a thermosetting plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the inner surface of the mold, remove the ungelled plastic from the mold and partially cure said gelled layer, said means for applying heat to the exterior of the mold, following fill, comprising a salt bath into which the mold is thrust as the mold support moves to said lower position to submerge the molds substantially up to the level of the plastic interiorly thereof and following withdrawal of the mold from the salt bath immersing it in a hot gaseous medium to evaporate the residual moisture from the surface of the mold prior to movement of the mold to the station for emptying.

15. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at each station, said means at the successive stations operating in succession to fill the mold with plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the inner surface of the mold, remove the ungelled plastic from the mold and partially cure said gelled layer, means at the station for removing the ungelled plastisol for inverting the mold at that station, said means effecting inversion of the mold by rotation and being operable to rotate the mold from an inverted position to an upright position following emptying of the mold, and means for thereafter introducing a predetermined quantity of added liquid plastic into the mold into the partially cured layer interiorly thereof, and for rocking the mold to incline the bottom upwardly from the heel toward the toe to distribute the added plastic over the shank and counter areas of the bottom.

16. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved intO and out of operative relation, with the means at each station provided for operating on the mold at each station, said means at the successive stations operating in succession to fill the mold with a plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the inner surface of the mold, remove the ungelled plastic from the mold and partially cure said gelled layer, said means for effecting gelling and partial curing comprise salt baths and a fresh water bath following the last of the salt baths into which the mold is thrust as the mold support is moved to its lower level to wash the salt from the mold.

18. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at each station, said means at the successive stations operating in succession to fill the mold with a thermosetting plastic, apply heat to the exterior of the mold to form an initial layer of gelled plastic on the interior surface of the mold, remove the ungelled plastisol from the mold and partially cure said gelled layer, means at the station for removing ungelled plastisol for inverting the mold, said means being operable thereafter to rotate the mold to an upright position, comprising means for depositing a predetermined quantity of added plastic into the mold following rotation to its upright position, means for rocking the mold from its upright position to an inclined position and back to add a layer to the shank and counter areas, and means at the next station of operation for again rocking the mold from its upright position to an inclined position and back again to add a second layer to the shank and counter areas, and to leave a residue in the heel pocket.

21. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on the mold presented thereto in the process of forming a finished article, a mold support, a mold on said support, said mold support being movable along said path thereby to carry the mold mounted thereon from station to station and movable vertically between stations to permit the mold to be moved into and out of operative relation, with the means at each station provided for operating on the mold at each station, means at the successive stations operating in succession to fill the mold with a thermosetting plastic, applying heat to the exterior of the mold to form an initial layer of gelled plastic on the interior surface of the mold, remove the ungelled plastic from the mold and partiAlly cure said gelled layer, said means for effecting removal of the ungelled plastic from the mold comprising means for rotating the mold from an upright position to an inverted position to empty the mold and return it to its upright position, said last-named means comprising a rotatable bracket on the mold support, clamping means on the bracket for attaching the mold thereto, drivable means operable to effect rotation of the bracket, said means being movable in elevation with the mold support, drive means at the base of the machine for driving said drivable means, and means on said drivable means and said drive means interengageable by movement of the mold support to said lower level to drivably connect the drivable means to the drive means.

24. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a base and rotatable mold support mounted thereon for movement along a predetermined path, molds mounted on the support, said support being movable vertically from one level to another during movement along said path, a plurality of stations situated along said path, and drive means for effecting intermittent lateral movement of the mold support and the molds carried thereby from one station to the next while the support is at the higher level, and for effecting vertical movement of the mold support and molds carried thereby from the higher level to the lower level and then back to the higher level during the interval between successive lateral movements, comprising means for initiating operation of said drive means to move the molds from station to station, means at the several stations operative while the molds are at the lower level to perform at least one operation thereon incident to the manufacture of the article, and means for supporting the molds on the support comprising arms mounted on the support at intervals corresponding to the distance between stations of operation, said arms extending laterally toward the operating stations, a bracket mounted between each pair of arms, means on each bracket operable to clamp a plurality of molds thereto, each bracket being rotatable about a horizontal axis to tilt the bracket and hence the molds at certain of said stations of operation, a shaft mounted on every other arm, a driving connection between each shaft and one of the brackets by means of which the bracket is rotatable, drive shafts mounted on the base at said certain stations of operation, means on the respective shafts interengageable by movement of the support to the lower level to connect the shafts at said stations with the drive shafts at said stations, and means operable to effect rotation of each drive shaft while the support is at said lower level, said means being reversible and being adjustable to enable predetermining the amount of rotation of each drive shaft.

25. Apparatus for use in the manufacture of hollow articles by slush-molding, said apparatus comprising a plurality of stations arranged along a predetermined path, means at each station for performing a different operation on a mold presented thereto in the process of forming a finished article, a base, a mold support mounted on said base, saiD mold support comprising a rigid structure rotatable about a predetermined center and wherein the stations of operation are located circularly about the structure, arms fixed to the structure extending radially from said center of rotation, the distance between adjacent arms at their distal ends corresponding substantially to the distance between stations of operation, bracket members pivotally mounted between the adjacent arms at their distal ends, clamps on the bracket members for clamping a plurality of molds to each bracket for movement of the molds circularly with respect to said axis of rotation and for rotational movement about horizontal axes, said mold support being movable along said path of rotation thereby to carry the molds mounted thereon from station to station and movable vertically between stations to permit the molds to be moved into and out of operative relation with the means at each station provided for operating on the molds at that station, a drive shaft at each of several stations of operations, means at the proximal ends of one arm of each pair of arms drivably engageable with one of said drive shafts by movement of the mold support to said lower level, means connecting each rotatable bracket with said means at the proximal end of one of the arms of the pair of arms with which it is associated, drive means for effecting repeated intermittent rotational movement of the mold support and molds carried thereby from one station to the next while the support is at the higher level and for effecting movement of the mold support and molds carried thereby from the higher level to the lower level and then back to the higher level during the interval between successive rotational movements, and means for initiating continuous operation of said drive means.