US3601849A

US3601849A - Apparatus for heat treating end portions of hair rollers

Info

Publication number: US3601849A
Application number: US750684*A
Authority: US
Inventors: Harry W Meyer
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-03-13
Filing date: 1968-03-13
Publication date: 1971-08-31
Anticipated expiration: 1988-08-31

Abstract

A hair roller has a brush and an internally supported tubular net component that is provided with shrunken filaments at its ends to retain the support in a proper position in the assembly. With heat shrinkable netting material, the filaments at the ends of the supported tubular component are heat shrunk and then followed with a water or air quench to ambient temperatures before the brush is inserted in the tubular net. Heating and quenching are accomplished with an apparatus having spaced heaters with associated quenching devices, and a carriage for conveying the internally supported tubular component through the heaters. The carriage is equipped with cam actuated holders for inverting the held items between heaters.

Description

United States Patent 72] Inventor ll-llarry W. Meyer 1388 Hibiscus St., Clem-water, Fla. 33515 [2]] Appl. No. 750,684 [22] Filed Mar. 13, 1968 Division of Ser. No. 426,169, Jan. 118, 1965, Pat. No. 3,434,193 [45] Patented Aug. 311, 19711 [54] APPARATUS FOR HEAT TREATING END PORTIONS OF HAIR ROLLERS 5 Claims, 10 Drawing Figs.

[52] 11.8. C1 116/6 R [51) Int. Cl 13291: 21/00 [50] Field olSearch 18/61, 26 R, 6 M, 5 E, 5 M, 6 R; 269/342, 345, 346, 347

[56] References Cited UNlTED STATES PATENTS 1,687,504 10/1928 Moffet et al. 18/5 E X 1,708,756 4/1929 Fagan et a1. 18/5 E X 2,342,041 2/1944 DeBold 18/5 E X 2,377,532 6/1945 Walters 264/342 X Primary Examiner.l. Spencer Overholser Assistant Examiner-John E. Roethel Attorneys-Baldwin and Martin, Roger L. Martin and George H. Baldwin ABSTRACT: A hair roller has a brush and an internally supported tubular net component that is provided with shrunken filaments at its ends to retain the support in a proper position in the assembly. With heat shrinkable netting material, the filaments at the ends of the supported tubular component are heat shrunk and then followed with a water or air quench to ambient temperatures before the brush is inserted in the tubular net. Heating and quenching are accomplished with an apparatus having spaced heaters with associated quenching devices, and a carriage for conveying the internally supported tubular component through the heaters. The carriage is equipped with cam actuated holders for inverting the held items between heaters.

PATENTEU AUGSI I971 3,601. 849

SHEET 1 OF d [NV/$110K.

HARRY W. MEYER PATENTEU M31 197;

SHEET 3 OF 4 IN VIiNTOR.

HARRY W. MEYER PATENTED M1631 I97: 3,601,849

SHEET l 0F 4 IWIMM lllll FIG. 9

INVIiN'I'UR.

HARRY W. MEYER AlPiPAlltA'lf llS MEAT TllllEA'lllNG lENlD lfOltTllONS O liilAlill t liiOlLlLlElPfi CROSS-REFERENCE TO RELATED APPLICATlON This application is a division of copending application Ser. No. 426,169, filed Jan. 18, 1965, now US. Pat. No. 3,434,193, and entitled Hair Rollers, and Processes, and Apparatuses Relating Thereto."

This invention relates to hair rollers or curlers and to the manufacture thereof.

A general object is to provide hair rollers of improved structural design, and to provide improvements in the manufacture of such rollers.

A more specific object is to provide improved hair rollers of the kind having a net component on which the hair wound by the user.

A particular object of the invention is to provide hair rollers of the kind having a net component and which are cheaper to manufacture, requiring less netting material, and, in addition, being more convenient and safer to use than other net type hair rollers currently being marketed.

Yet another object of the invention is to provide net-type hair rollers of the kind having a brush component that busted for retaining the hair on the roller during use, the hair rollers being easier and less costly to assemble during the manufacture thereof than other and more conventional hair rollers of this kind.

A further object is to provide improvements in processes for manufacturing net-type hair rollers as well as to provide improved apparatus for use in the manufacturing procedures.

One object is to provide a process of assembling the components of net-type hair rollers having a brush element and which avoids problems commonly occuring as the elements are assembled because the brush component becomes entangled with the net component.

A further objective of the invention is to provide a process for assembling collapsible net components and the support components of net-type hair rollers, and which provides a finished assembly in which the support component is less readily displaced from its supporting position in the assembly than is the case with more conventional net'type rollers.

Another object of the invention is to provide apparatus for automatically securing the support components of net-type hair rollers in the hollow of the net component.

A further objective is to provide apparatus that eliminates the need for hand labor in certain steps involved in manufacturing net'type hair curlers, and which provides a partially assembled roller that is more convenient and safer to manipulate by hand in further assembling the components of the finished hair roller.

One of the more popular hair rollers used by women for curling their hair has a tubular net component which is internally supported against collapsing during use by an elongated helical component, the helical wire element being housed in the hollow of the net component. The support component is retained in the hollow by tucking the opposite ends of the net component in the open ends of the helical member during the manufacturing process. These end tucks frequently become displaced during subsequent steps involved in the manufacture of the rollers, as well as when used by the ultimate user. They also fail to provide a tight assembly that avoids movement of the components when the roller is manipulated by the user. When the tucks become dislodged during the manufacturing process, excess labor is required to correct the situation and on occasions the workers have been known to injure their fingers in correcting the situation. Not infrequently the user finds that the need arises to replace the tucks, and when this happens, it occasionally occurs that the user engages the end of the wire component used in forming the helical support member and similar injury results to the finger.

In addition most of the net-type hair rollers also contain a brush component which is lodged in the hollow of the assembled net and support component. During the manufacture of the roller, the brush is placed in the assembly after the net and support components have been assembled. This creates a problem in the manufacture of the roller when the net and support are retained in position by end tucks for frequently the brush bristles become entangled in the net and pull out one or more of the tucks. This of course requires considerable labor and time to correct the situation, and among the objectives of the invention is to provide process, apparatus and structural design features that avoid or eliminate one or more of the mentioned objections or problems.

it has been found that by shrinking the end portions of the tubular net component after the support component has been inserted in the hollow of the net that the support component is better and more permanently secured in its proper place in the assembled roller. The need for reinserting the tucks when they become loosened is avoided and, from a manufacturing point of view, less netting material is required. in the shrinking process carried out during the manufacture of the improved rollers, the end openings in the tubular net component are reduced in size due to the shrinkage of the filaments of the net at such openings, and the support component is trapped in the hollow of the net and thereby prevented from being dislodged or removed through the shrunken end openings.

in general, it has been found that the net may be drawn into a tighter fitting relation on the support component by virtue of the process, thus providing a tighter assembly which minimizes movement of the net relative to the support component during use as compared to more conventional net-type hair rollers. This makes the roller more attractive to the user because of the feeling of tightness realized upon manipulation by the user. in addition, it has been found that less net material is needed in manufacturing net-type hair rollers of comparable sizes currently being marketed when the opposite ends of the net are shrunk to secure the support component in place.

Yet another advantage to the invention lies in the manufacturing process per so. It has been found, for example, that the problems that heretofor have been encountered during the manufacturing process of assembling the rollers, as when the brush component is housed in the partial assembly and becomes entangled with net, are completely avoided when the support component and net component are secured in place by means of the shrinking process described hereinafter. In effect, it has been found that if the support component is secured in the hollow of the net by a process of shrinking the ends of the net, that the brush component may thereafter be easily and efiiciently inserted in the partially assembled roller without dislodging the net component through entanglement with the brush bristles.

The novel features which are believed to be characteristic of this invention are set forth with particularity in the appended claims. The invention, itself, however, both as to its organization and method of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings, in which:

FIG. I is a perspective view of an assembled hair roller or curler embodying certain concepts of the: invention;

FIG. 2 is a plan view of an apparatus that may be used in carrying out the shrinking process in accord with certain aspects of the invention;

FIG. 3 a rear side elevational view of the apparatus seen in FIG. 2;

FIG. 4 is an enlarged section view of a heating unit embodied in the apparatus seen in FIG. 2 and shows the general relation of the end of a partially assembled roller to the heating elements of the unit at one stage in the heating process, the view being taken at the feed end of the unit and generally along the lines i i;

FIG. 5 is another enlarged section view through the heating unit seen in FIG. 2 and in FIG. 4 and shows the general relation of the end of another partially assembled roller to the heating elements at a more advanced stage of shrinkage of the end, the view being one nearer the discharge end of the unit and generally along the lines 5-5 of FIG. 2.

FIG. 6 is an enlarged side elevational view of one of the holders seen in FIGS. 2 and 3, the roller having been removed to better expose the parts of the holder and the view showing the holder in relation to certain other parts of the apparatus at the time the holder is being inverted so that the untreated end of the hair roller may be subjected to a heat-type shrinking step in the second heat-treating unit of the apparatus;

FIG. 7 is a section view along the lines 7-7 of FIG. 6;

FIG. 8 is a face view of a component of a retainer mechanism shown in FIG. 7 and which is used to restrict rotary movement of certain parts of the holder, the view being taken generally along the lines 8-8 therein to show the relation of the component to certain adjacent structure in the assembled holder;

FIG. 9 is a rear elevational view of a fragment of a cam wheel and a spring component of the retainer seen in FIG. 7, together with adjacent structure seen generally along the lines 9-9 of FIG. 7;

FIG. 10 is a perspective view of certain parts or the apparatus at the discharge station for the heat treated elements as seen more or less along the lines 10 10 in FIG. 2.

With reference to FIG. 1, an assembled hair roller embodying certain concepts of the invention is designated at 10. It has an elongated hollow tubular net component 11 which is supported internally against collapse by an elongated cylindrical component 12. Component 12 is formed from an elongated wire element 13 which has been wound in the shape of a helix. The convolutions 14 of component 12 are generally spaced apart in the hollow 15 of the net component 11 and they support the cylindrical meshed wall portion 16 of the net component against collapse into the hollow.

The opposite end portions 17 of the net component 11 have been shrunken by the shrinking process referred to hereinafter and partially close the end openings 18 into the hollow 19 of the support component. In their shrunken condition they form annular flanges which project radially inwardly at the opposite ends of wall portion 16 and restrict axial movement of the support component 12 as well as protect or shield the end extremities 20 of the wire element 13 from practical direct contact by the user.

In the process of shrinking the end portions 17, the flexible filaments 21 contract linearly and deform the end portions. As such, the size of the end openings 18 into the hollow 15 is diminished and the support component is trapped in place. The hair is wound on the exterior surface 22 of the meshed wall portion 16 by the user and is maintained in place by a cylindrical brush component 23 that is housed in the hollow 19 of the helical component. The bristles 24 of the brush are secured between twisted wire elements 25 arranged along the axis of the brush, and the bristles 24 project radially thereof in the assembled roller 10. The ends 26 of the bristles 24 extend between the convolutions l4 and through the meshes 27 in the wall surface 22, and the hair is kept in place on the roller surface through entanglement with the outwardly extending bristle ends 26. v i.

The filaments 21 of the net may be made from any material which may be shrunk by a suitable shrinking process during the process of assembling the components in accord with the broader concepts of the invention. Preferably, however, filaments of synthetic plastic material that will shrink when heated to elevated temperatures are used in the construction of the tubular net component. Synthetic plastic material such as the polyallomers marketed by the Eastman Kodak Company under the trade mark Tenite, as well as those marketed by the E. I. Du Pont De Nemour Company under the trade mark Vexar" have been found eminently suitable materials for use as filaments of the tubular net components. These materials have been found in filament form to permit the filaments to shrink and decrease in length when subjected to temperatures at which the materials become more or less semifluid and tacky.

In the preferred process of assembling hair rollers embodying net components made from heat shrinkable filaments of synthetic plastic material, the support component is first inserted in one of the open ends of the net component and lodged in the hollow thereof between the opposite end portions of the net. Thereafter, the filaments of the end portions are subjected to a heat treatment that decreases the lengths of the filaments and causes the end portions to shrink. The shrinking process diminishes the sizes of the end openings in the net and thus traps the support element in place. The filaments tend to become tacky and semifluid at the elevated temperatures to which they are subjected during the heat treatment step and hence it is preferable to rapidly cool the end portions immediately after their heat treatment. This can be accomplished by spraying a fine mist of water or other cooling liquid on the heat treated ends so as to quench the ends and rapidly cool the filaments to ambient temperatures. Thereafter, the brush component can be inserted through one of the openings of diminished size in the net and housed in the body of the roller without dislodging the assembled components.

The process of the invention will become more apparent from consideration of the apparatus shown in FIG. 2-10 and which is adapted to automatically heat treat the opposite ends of the net components of the partially assembled rollers fed thereto. 5

With reference to FIGS. 2 and 3, the heat treating apparatus is generally designated at 30 and includes a pair of elongated arcuate

tunnellike heating units

31 and 32 and a carriage mechanism 33. The partially assembled rollers 34 are hand fed to individual holders 35 therefor from a feed station designated at 36, and are automatically discharged from the carriage after the heat treatment at a discharge station 38 by means of a device designated at 37. Mechanism 33 is adapted to carry the partially assembled rollers 34 along a path 39 that exposes the opposite ends of the net components to a heat treatment which is carried out successively in

units

31 and 32. The heating units W1 and 32 are arranged on the same side of the path traversed by the rollers, and hence means 40 that cooperate with certain components of the holders is provided for inverting the assemblies between the

units

31 and 32. In this way, one end of the partially assembled roller held by each holder is treated in unit 31 and the opposite end is treated in unit 32.

The principal parts of the apparatus 30am: supported on a framework 41 that includes four inclined posts 42 which are rigidly interconnected at the bottom by a flat horizontal plate 43. The upper ends of the posts are fixed and held in spaced relation by another rigid plate element 44. A horizontal support plate 45 is connected to the posts in the center of the framework for supporting a gear mechanism 46. A variable speed electric motor 47 is mounted on plate 43 of the frame and the input shaft 49 of the mechanism 46 is driven by motor 47 by means of a belt connection 48. The output shaft 50 of the gear mechanism extends vertically through a centrally located opening therefor in plate 44, whereas the belt connection between motor 47 and mechanism 46 is slightly offset from the rear edge of plate 45. Motor 47, through gear mechanism 46, serves to continuously drive an annular or ring component 51 of the carriage 33 about the axis of shaft 50 and in the direction of arrow 39 when the apparatus is in operation.

Ring component 51 consists of a narrow? metal element which has been bent in the shape of a circle and the opposite ends butt welded together. Ring 51 is supported above the base portion 52 of the framework 41 on shaft 50 through four elongated members 53 which are welded at their outer ends to the inside face of the ring. Members 53 extend more or less radially of the rotary axis of component 51 and are fixed at their inner ends between a flat circular bottom plate 54 and a square plate 55. Plate 55 is spaced above plate 54 to accommodate the location of the inner ends of the members 53 therebetween at the hub 56 of the wheellike structure. These inner ends are somewhat offset from the axis of the shaft 50 as seen in FIG. 2 to provide structural strength in the wheellike structure. The upper end 56 of shaft 50 is threaded in centrally located openings in

plates

56 and 65. A portion of the upper end 68 of shaft 50 projects above plate 56 and engages a nut 57 that is fixed to the upper surface of plate 55 coaxially with the threaded openings in the plates d and 5S therebetween. SAt this point, the wheellike structure is keyed for rotation by and about the vertical axis of shaft 60 by key 59.

The holders 35 are spaced from each other along the outside of the ring iii, and the structure of the individual holders is best seen in MG. 6-9 by reference to that of holder 60. Holder 60 is seen in FIG. 6 and 7 with the partially assembled roller element removed and with the longitudinal axis of the clamp component 67 of the holder in the horizontal position it assumes at the halfway point in being inverted between the heating units through contact made with certain fixed elements of mechanism it). This position is also illustrated in FIGS. 2 and 3.

The assembled holder 60 is connected at the outer face 61 of the ring M by a round headed bolt 62 which is threaded in a suitable opening therefor in the ring. The bolt 62 is secured in place by a nut 63 and lockwasher 64 located at the inner face 65 of the ring Ell. Ring 51 is strengthened at the opening by a square metal plate element 66 which is welded to to the outer face of the ring and in which the bolt is also threaded.

The clamp 67 of holder 60 has a rectangular backplate 70 which is fixed to the front face of cam wheel component 72 of holder 60. The

opposite end portions

68 and 69 of plate 70 are provided with spaced

prongs

26 and 29 which are integrally connected to the back portion 70 and made from spring steel so as to yield when a partially assembled roller is fed to the clamp 67 at the feed station.

Prongs

28 and 29 are adapted to grasp the partially assembled rollers at the opposite ends of the housed support component and extend outwardly from the bacltplate 76. The axis of the clamp 67 is arranged transversely of bolt element 62 and the prongs are arranged to hold the roller elements with its longitudinal axis extending transversely of the axis of rotation of the holder.

The prongs 2d and 29 are further adapted and arranged to hold the roller element in a position which is offset from the face of the bacltplate so as to enable the roller to be removed from the clamp 67 by device 37. Plate 70 is fixed to the front face 7i of the cam wheel 72 and the openings in plate 70 and wheel 72 for bolt 62 are such as to enable these elements to be rotated together about the bolt stem 73 when the cams encounter the fixed elements 76 and 75 of mechanism 40.

During the operation of the apparatus 10, the

prongs

28 and 29 of clamp 67 are normally aligned vertically in the assembled holder 60 so that the longitudinal axis of the partially assembled roller is also arranged vertically during the passage of the roller through the heating units. Between

units

31 and 32, however, the holders are caused to rotate 180 to invert the prongs and the roller elements held thereby so as to place the untreated net ends of the rollers subjected to the heat treatment step in unit 31 in an upright vertically extending position for subsequent heat treatment in unit 32. During the process of inverting the holder 60, the cam wheel 72 of the holder engages two fixed elements in succession and each element is so arranged as to cause the wheel to rotate 90 upon engagement by the cam of the wheel 72 as the holder passes the element.

Provision is also made for restricting rotary movement of the holders when the cams are disengaged from the elements 76 and 75 and thus for retaining the holders in the position assumed after such engagement. Thus, in addition to cam wheel component, each of the assembled holders is also provided with a spring component that cooperates with the cam wheel and is rotated thereby, as well as with another component that is secured to the ring and cooperates with the spring component in restricting rotary movement of the holders.

The spring component of holder 60 is designated at 76 and best seen in FIGS. 7 and 9. It consists of an elongated flat rectangular member made of spring steel and which is arcuate the backface of the wheel on opposite sides of the bolt stern and in an elongated groove 80 provided in the wheel face 78. An opening till is provided between the opposite ends of the spring; for the free passage of bolt stem 73 through the member 76, and by virtue of the arrangement, the spring member 76 is engaged by the walls of the groove and caused to rotate about the stem of the bolt when the cams engage the fixed elements 74 and 75.

Spring 76 is held under compression between the bacltfac'e 78 of the cam wheel and the front face 32 of component 83 in the assembled holder 60. Component 83 consists of a flat rectangular block which tits in a matching rectangular recess 84 in the front face of the metal plate element 66. Block 63 has a central opening 85 through the stem of the bolt extends as seen in F168. 7 and 9, and is provided with four more or less semispherical surface recesses 86 which are offset from the axis of the bolt. These recesses 86 are spaced at intervals about the axis thereof. Spring component 76 is provided with a pair of dents in the face of the concavity and which provide spaced bulbular portions 37 on opposite sides of the center opening in the back of the spring. These bulbular portions 87 are adapted to fit in the horizontally aligned recesses seen in FIG. 8 when the axis of the clamp 67 and held roller element are vertically arranged and in the vertically aligned recesses seen in FIGS, 7 and 8 when the axis of the clamp and held roller are horizontally arranged. When the clamp 67 is rotated to a new position by virtue of the cam action, the spring 76 is also rotated. This forces the bulbular portions 87 to ride out of the engaged recesses in face 82 and therealong until they engage in the next recesses available in the direction of rotary movement. Block 83 is preferably made from Teflon or polyethylene to provide a self-lubricated surface for the bul bular portions to bear against during rotation of cam wheel 72, although other suitable materials may obviously be employed.

The cam wheel 72 of each holder is provided with four cam arms that extend radially of the rotary axis of the wheel and the arms are arranged 90 apart. The cam surface 88 of each arm is inclined from the longitudinal axis of the arm. When the arm is in position for the cam surface to engage one of the fixed elements 74 and 75, it extends downwardly and to the right, toward the leading edge of the holder, as seen in FIG. 9. In this position, the cam surface is vertically arranged and aligned to engage the fixed element. Upon engaging the element, the cam wheel and clamp are rotated 90 in the direction of arrow 90 as the carriage moves forward along the path and further rotation is restricted by the spring mechanism, once the cam surface becomes disengaged from the element. During the cam action, the next arm of the cam wheel is drawn down and placed in position to encounter the next fixed element along the circular path. Overall it requires two revolutions of the ring component 51 in order to rotate the cam wheel and clamp 360.

The fixed elements 74 and 75 are elongated cylindrical members that are held by

setscrews

91 and 92 in suitable holes in a bracket 93. Bracket 93 is supported beneath the Rlng 51 on the outer end of an elongated tubular component 94 of the frame. The inner end of component 94 is welded to the underside of plate 44. As the carriage moves the holders along the endless circular path, element 74 is the first element engaged by the cam wheels of the holders. This engagement causes the holders to first rotate 90, thereby placing the held roller elements in a horizontally extending position, such as illustrated in FIGS. l and 2 by reference to holder 60. Element 75 is spaced in advance of element '74 and is next to be contacted by the cam wheel of the holders as they move between units 311 and 32. Upon such contact, the holder is again rotated another 90. This completes the inversion of the clamp and places the untreated end portion of the net in an upstanding position for subsequent heat treatment in unit 32.

The structure of the

heating units

31 and 32 is similar and is best illustrated by reference to FIGS. 4 and 5. Each unit has arcuate inner and

outer sidewalls

96 and 97 which are spaced and rigidly interconnected by a flat arcuate top wall 98. These walls are covered exteriorly with insulation designated at 99, and form an elongated open-bottom arcuate tunnellike structure which is more or less inverted U-shape in cross section.

Unit 31 has a pair of elongated electrical

resistance heating elements

100 and 101 which are hung from the top wall of the unit on spaced hangers designated at 102. The elements are offset from the bottom opening 150 between the

walls

96 and 97 and electrically connected in parallel in the circuit by

end wires

103 and 104. Unit 31 is bolted to metal straps 105 which are fixed upright at the outer ends of spaced radially extending tubular components 106 of the framework. Components 106 are welded to the underside of plate 44 and project outwardly to the straps at the underside of the annular ring 51.

Unit 31 is arranged to cup the upper ends of the rollers between the sidewalls during their passage through the unit, and is supported on the framework in a manner such as to incline downward toward the ring 51 from the feed end 107 to the discharge end 108 of the unit. This is best illustrated in FIGS. 4 and wherein it will be seen that the space 109 between the ends of the nets of the rollers depicted therein and the

heating elements

100 and 101 remains about the same as the net ends shrink during the heating step and drawn down toward the end of the support element.

Unit 32 is similarly constructed and arranged and is supported on frame components 110 which are similar to components 106. Like the

elements

100 and 101 of unit 31, the heating elements 111 and 112 of unit 32 are electrically connected in parallel by

end wires

113 and 114 in the circuit. The heating elements of the respective units are connected in series in the electrical circuit by an electrical element which connects

wires

113 and 104. Wire 103 is connected to one side of an AC source of electricity by wire 116 and wire 1 14 is connected to the other side of the source by wire 117.

Nozzles

120 and 121 are provided at the discharge ends of

units

31 and 31 for directing fine sprays of cooling water on the heat-treated roller ends as they emerge from the units. These

nozzles

120 and 121 are supported on standards not shown, and are connected to a suitable source of fluid therefor.

The partially assembled rollers are delivered to the feed station 36 on a conveyor belt 122 seen in FIG. 2 and which is suitably supported in a position for the operator of the appara tus to hand feed the partially assembled rollers to the clamps as they pass in front of the belt.

The discharge station 38 has an inclined chute 123 which is adapted to catch the rollers as they are dislodged from the clamps by discharge device 37. Chute 123 is suspended from a depending bracket 124 which is connected to a tubular com-' ponent of the frame. Component 125 is connected to the underside of plate 44 and extends outwardly from beneath the ring 51 as seen in FIG. 2.

The discharge device is also connected to bracket 124 and includes an elongated arm 126 that has an arcuately curved end 127. The curved end 127 is arranged in the path of the elements held by the holders as they emerge from the discharge end of heating unit 32. The curved end portion 125 is adapted and arranged to extend between the vertically spaced prongs of the clamp and between the element held by the clamp and the face of the clamp backplate as the holder advances from the discharge end of unit 32. As such, the elongated arm is engaged by the clamped roller and the roller is dislodged from the grip of the clamp as the carriage mechanism moves the holder by the discharge device. The discharge device 37 has a wall component 128 that is offset from the outer face of the arm 126 and which is also connected at one end to bracket 124. Wall 128 serves to deflect the dislodged roller into the feed end 129 of the chute suspended therebelow. Thereafter, the roller passes beneath the wall as it falls down the chute.

The operation of the apparatus is believed evident from the previous disclosure. Briefly, however, the empty holders 35 of the carriage mechanism enter the feed station 36 area of the apparatus with the prongs of the clamps aligned vertically. The partially assembled roller elements are hand fed to the empty holders thereat and at this point in the operation of the apparatus, the clamps hold the partially assembled rollers in a manner such that one of the end portions of the net component extends upright, whereas the other end portion extends downwardly. As each roller is thereafter conveyed into the feed end of unit 31, the roller is held upright so that it extends through the elongated exterior opening between the sidewalls and with the net end portion so disposed between the sidewalls 96 and 97 that it is radiantly heated and ultimately in the unit 31 to a temperature at which the filaments of the end portion start to shrink. This heat treatment continues as the end of the roller passes through unit 31. As the roller emerges from the discharge end of unit 31, the shrunken net end portion is rapidly cooled to ambient temperatures through contact with the spray from nozzle 120. Thereafter the cam wheel of the holder encounters the fixed elements 74 and 75 and this inverts the clamp and roller element. In this inverted position, the untreated end portion of the net component extends upwardly and in a position to thereafter be subjected to the heatshrinking process accorded the element in unit 32. The heat treatment step carried out in unit 32 is like that carried out in unit 31 and upon emerging from the discharge end of the unit 32, the shrunken net end portion is similarly cooled to ambient temperatures through contact with the spray from nozzle 121. Thereafter, the roller is dislodged from the holder by device 37 and is discharged from the apparatus via chute 123.

While only'a certain preferred embodiment of the invention has been shown and described by way of illustration, many modifications will, of course, occur to those skilled in the art and it is therefore desired that it be understood that it is intended in the appended claims to cover all such modifications as fall within the true spirit and scope of the invention.

What is claimed as new and what is desired to be secured by Letters Patents of the United States is:

1. An apparatus for heat treating the opposite ends of elongated elements comprising a carriage mechanism for continuously carrying elements fed thereto along a path from afeed station to a discharge station, said mechanism including a plurality of spaced holders being adapted and arranged to rotate about an axis and to hold one of said elements transversely of said axis with one of the opposite ends thereof extending toward a side of said path at one position of rotation thereof and with the other of the opposite ends thereof extending toward said side at another position of rotation thereof, each of said holders having respective cam means connected thereto and rotatable therewith, and each of said holders having spring means for restricting rotary movement thereof at said one position and at the other position of rotation thereof; a pair of fixed heating units, one of said units being in advance of the other unit along said path and at said side thereof; said units being adapted and arranged to heat treat the ends of the elements extending toward said side thereat, and fixed means located along said path between said heating units adapted and arranged to cooperate with some cam means to in succession rotate said holders from said one position to the other position of rotation thereof.

2. An apparatus for use in heat-treating meshed end portions of partially assembled hair rollers that have an elongated hollow tubular net component made of heat shrinkable filaments and which is internally supported between the opposite meshed end portions thereof, said apparatus including a holder having clamp means adapted to receive and grasp a partially assembled hair roller between its opposite meshed end portions, an elongated heating unit which has opposite ends including a feed end and a discharge end and which comprises spaced sidewalls that extend between the opposite ends and are arranged to provide an elongated exterior opening into the space therebetween, and a heating element which is offset from the opening and located in the space between the walls, and means for carrying the holder along an endless path of movement and which is adapted and arranged to carry the holder along the elongated exterior opening and from the feed end to the discharge end of the unit; said clamp means being arranged during movement of the holder along the opening to support a roller received thereby so that it extends through the opening and with one of its opposite meshed end portions in the space between the walls to thereby subject the end portion to heat treatment in the unit, and said apparatus further including means at the discharge end of the unit for rapidly cooling the end portion of a roller treated in the unit to ambient temperatures.

3. An apparatus in accord with claim 2 which has a feed station and a discharge station, and which further includes means at the discharge station for dislodging a heat-treated roller from said clamp means,

4. An apparatus in accord with claim 2 where the means for rapidly cooling the end portion of a roller treated in the unit comprises nozzle means for directing sprays of a liquid onto the heat-treated end portion to rapidly cool it to ambient tem peratures.

5. An apparatus for use in heat-treating meshed end portion of partially assembled hair rollers that have an elongated hollow tubular net component made of heat shrinkable filaments and which is internally supported between the opposite meshed end portions thereof, said apparatus having a feed station and a discharge station and comprising a holder which includes a clamp and cam means connected to the clamp, means for carrying the holder along an endless path of movement passing the feed station and the discharge station, and means carried by the holder carrying means and establishing a rotation axis for the holder; said clamp being adapted to receive a partially assembled roller at the feed station and to grasp the roller between its opposite meshed end portions, and said holder being rotatable through first and second positions therefor and being arranged at the first position to hold a received roller with one of its opposite meshed end portions at one side of the path of movement and at the second position to hold the received roller with the other of its opposite meshed end portions at said one side; said apparatus further comprising spring means carried by the holder carrying means and restricting rotational movement of the holder at its first and second positions, means located along the path of movement between the feed station and discharge station and arranged to cooperate with the cam means in rotating the holder between its first and second positions, and a pair of elongated heating units respectively located along the path of movement between the feed station and the cooperating means and between the cooperating means and the discharge station; each of said heating units having opposite ends that include a feed and and a discharge end and comprising spaced walls that extend between the opposite ends and are arranged to provide an elongated exterior opening into the space therebetween, and a heating element offset from the opening and located in the space between the walls, and each of said heating units being so arranged at said one side the path of movement that the meshed end portion thereat of a roller grasped by the clamp passes from the feed end to the discharge end of the unit during operation of the apparatus, is arranged in the space between the walls during such passage, and is thereby subjected to heat treatment in the unit; said apparatus further comprising a pair of nozzle elements respectively located at the discharged ends of the units for directing sprays of cooling water onto the heat treated rollers.

Claims

1. An apparatus for heat treating the opposite ends of elongated elements comprising a carriage mechanism for continuously carrying elements fed thereto along a path from a feed station to a discharge station, said mechanism including a plurality of spaced holders being adapted and arranged to rotate about an axis and to hold one of said elements transversely of said axis with one of the opposite ends thereof extending toward a side of said path at one position of rotation thereof and with the other of the opposite ends thereof extending toward said side at another position of rotation thereof, each of said holders having respective cam means connected thereto and rotatable therewith, and each of said holders having spring means for restricting rotary movement thereof at said one position and at the other position of rotation thereof; a pair of fixed heating units, one of said units being in advance of the other unit along said path and at said side thereof; said units being adapted and arranged to heat treat the ends of the elements extending toward said side thereat, and fixed means located along said path between said heating units adapted and arranged to cooperate with some cam means to in succession rotate said holders from said one position to the other position of rotation thereof.

3. An apparatus in accord with claim 2 which has a feed station and a discharge station, and which further includes means at the discharge station for dislodging a heat-treated roller from said clamp means.

4. An apparatus in accord with claim 2 where the means for rapidly cooling the end portion of a roller treated in the unit comprises nozzle means for directing sprays of a liquid onto the heat-treated end portion to rapidly cool it to ambient temperatures.