GB1571568A

GB1571568A - Thermal barrier crimping apparatus

Info

Publication number: GB1571568A
Application number: GB2598277A
Authority: GB
Original assignee: Ethyl Corp
Current assignee: Ethyl Corp
Priority date: 1976-06-21
Filing date: 1977-06-21
Publication date: 1980-07-16
Also published as: JPS53174U; CA1078591A; FR2355585A1; DE2727060A1; DE2727060C3; IT1079660B; DE2727060B2

Description

(54) THERMAL BARRIER CRIMPING APPARATUS (71) We, ETHYL CORPORATION, a Corporation organised and existing under the Laws of the State of Virginia, United States of America, of 330 South Fourth Street, Richmond. State of Virginia 23219, United States of America, do hereby declare the invention. for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The present invention generally relates to an apparatus and method for making a thermal break construction element having an insulating or thermal barrier member therein, commonly referred to as a thermal barrier or thermobreak member. Such members may be employed in the construction of windows, doors, frames therefor, curtain walls and the like.

The invention particularly relates to an apparatus for making a unitary construction element. wherein an insulating member is joined to metal members by a crimping operation.

With the advent of metal construction use ' in making windows, doors, frames therefore curtain walls and the like, problems of heat conduction and water condensation have arisen. The use of aluminum or other metals caused a greater transfer of heat between wall elements than had heretofore taken place in earlier trees of construction. To solve this problem, some type of insulating or thermal break construction was essential. Accordingly, a variety of thermal barrier or thermobreak constructions and methods and apparatuses for making such constructions have been developed.

One type of construction which has achieved some degree of success is one in which the insulating material is poured, flowed, foamed. and formed in place. U.S.

Patents 3,204.324; 3,332,170; 3,393,487; 3,624,885 (Reissue No. 28,084 and Reissue No. 28,086); 3,634,565; and 3,823,524 are illustrative of such type of construction. Of these, 3,204,324 is representative of a method of making a thermal barrier construction element or insulating construction, wherein a metal shape having a generally J-shaped channel therein is filled with a flowing resinous insulating composition; the composition is cured, and subsequently a portion of the metal member or web forming the base of the channel is removed. No.

3,823,524 relates to a similar method but employs a web member which extends convexly between the structural member forming the channel. Both of these methods require the use of a liquid resinous composition which is subsequently cured or hardened. No. 3,393,487 discloses a somewhat more complicated process for making a thermal insulating joint construction and also utilizes a liquid plastic material. In such process, two separate elongate metal shapes are spaced apart and fastened together with a solid first insulating member. The two shapes and the first insulating member provide a channel in which a second thermal insulating member is flowed therein. Upon solidification of the latter, the metal and insulating members are locked together as an integral unit.

Of the more common types of thermal barrier constructions, two metal members are joined together by a solid insulating member. These constructions encompass a wide variety of insulating and/or plastic shapes and metal shapes. Illustrative of these are U.S. Patents 2,835.360; 3,093,217; 3,099,337; 3,289,377; 3,436,884; 3,487,580; 3,600,857; and 3,916,503. In one of the more basic of this type of construction, for example, in 2,835,360, two metal members are joined together and spaced apart by an overlapping insulating member. In 3,916,503, simple mechanical means are employed to Join the metal members with - tan insulating member. No. 3,600,857 is representative of more complex shapes of insulating and metal members.

In a particular type of the foregoing more common type of thermal barrier constructions, metal and insulating members are mechanically joined together by deformation of the metal members or by crimping (known sometimes as stitching) the metal members on the insulating member. Representative of such a joining method are U.S.

Patents 3,114,179; 3,411,995; 3,420,026; 3,517,472; and 3,903,217 and Swiss Patent 320,988 (same as British Patent No.

768,499). For example, 3,420,026 discloses several types of thermal insulating members and methods of making them. In one type, two separate metal members are mechanically joined to a central insulating member by crimping or deformation of groove means or projections on the metal members. In one particular type of thermal break construction, the insulating member is in the shape of a Maltese cross in cross-section. In another embodiment, the insulating member is made from a thermoplastic material and a portion thereof is heated to cause melting and flow of the plastic into an associated groove means formed by the two metal members. Upon cooling of the plastic, the metal and plastic member are unitarily joined together. No. 3,517,472 also illustrates a mechanical joining process similar to that of the former and additionally represents the use of a plastic or insulating member which expands upon heating. The Swiss patent discloses several types of window or door frames, one of which employs a crimp system using two separate metal extrusions having a pair of flanges thereon which form grooves for receiving a plastic rod. After the plastic rod or thermal barrier member is introduced into the grooves, the flanges are pressed towards the plastic rod or crimped thereon so that they are flush with the sides of the rod.

Other types of thermal break or insulated window or wall constructions are illustrated by U.S. Patents 2,654,920; 3,055.468; 3.289,377; 3,411,254; and, 3,466,801. For example, No. 3,411,254 provides a plastic thermobreak which utilizes a plastic locking strip which contains a heat actuated blowing agent to join two separate metal shapes.

After assembly of the two metal shapes and the plastic strip, the unit is heated to expand the plastic into tight engagement with the two metal members. U.S. Patent 3.815.216 illustrates still another method of manufacturing a thermal break construction element and employs a metal extrusion which has a removable interior section which is subsequently removed to separate the extrusion into two metal members. While maintaining the separate metal members spaced apart, a plastic material is inserted therebetween.

The construction element can be made in a continuous operation.

Of these various types of thermal break constructions, the system of crimping or stitching has enjoyed considerable commercial success. In such systems, crimping is often done manually or by simple mechanical means. Such means are of course relatively slow and have limited flexibility. One current system consists of a feeder for inserting straight lengths of vinyl or other suitable plastic insulating members in the metal members. Rollers are employed to provide crimping of the metal flanges onto the insulating or plastic member. Conventionally, two rollers or wheels are required to crimp the flanges. One roller must actually bend the metal flanges on the insulating member while the other roller must back-up or hold the metal extrusion in the correct position for joining metal and plastic members. To accomplish the crimping action, clear access must be available on both sides of the plastic member on which crimping of the metal members occurs. In some cases, a small wheel or support is laterally employed to serve as a back-up.

The size of the support and the forces required to obtain a tight joint create a number of operating problems. The types of shapes or extrusions which can be used in this method are extremely limited. Finished parts have to be removed by hand after the stitching or crimping operation is completed.

The invention provides apparatus for making a unitary thermal break construction element having metal members spaced by an insulating material comprising a guide means for holding the metal members, means for inserting an insulating material between the metal members, whilst they are held in the guide means, crimping means for receiving the metal members with the insulating material therein and for crimping each metal member, said crimping means including Q plurality of alternating guide stations and crimping stations with a guide station being positioned before each crimping station to guide the two metal members and the insulating material therebetween into a desired position in the following crimping station, including a removable guide block assembly adjustable for accommodating metal members of various crosssectional configurations, and each of said crimping stations being adjustable for accommodating metal members of various cross-sectional configurations.

According to a particular aspect of the invention, there is provided apparatus for crimping two spaced apart metal members onto an insulating material to thereby provide a unitary thermal break construction element, comprising a frame mounting a plurality of alternating guide stations and crimping stations thereon, a guide station being positioned before each crimping station to guide the two metal members and insulating material therebetween into a desired position in the following crimping station. each guide station including a removable guide block assembly adjustable to lcconi:nociate metal members of various cross-sectional onfigurations, and each of said crimping stations being adjustable for accommodating metal members of various cross-sectional configuration.

The thermal barrier members or construction elements of the invention may be used to make aluminum windows, doors, frames therefor and the like, comprising metal members joined together by an insulating member. A specific embodiment of the apparatus of the invention comprises a reel or unwind stand for holding and supplying insulating or thermal barrier material, such as a reel of vinyl of a predetermined size and cross-section: a feeder for receiving the insulating material from the reel and inserting it into metal members or shapes for joining relationship therewith; a guide box for receiving and holding in place the metal members or shapes which are to be joined with an insulating member; a stitcher or crimping machine for crimping the metal members on an insulating member: and. a take-off unit or run out table for receiving finished parts or thermal barrier shapes from the crimping or stitching operation.

Fhe unwind stand, feeder, stitcher, guidebox and take-off table are positioned or located in a line one after the other to form a continuous production line for making unitary thermal barrier construction ele uients or members from an insulating member and a metal member or members.

The stitcher or crimping machine comprises a plurality; of guide stations and crimping stations arranged alternately and preferably adjacent each other. Each guide station may comprise a removable block unit having an upper and lower block. A guide block unit maybe so adjusted as to handle a particularly shaped or configured (in cross-section) metal member. The crimping stations are fixed and are adaptable to accommodate a wide variety of shapes. There are at least two stitch stations, e.g. a first stitch station for crimping one side of a metal member and a second stitch station for crimping one side of another metal member or another side of ibe same metal member.

The features and advantages of this invention will be more readily apparent in the following detailed description of an illustrated embodiment which is to be read in connection with the accompanying drawings, wherein: Figure 1 is a front view of the complete machinery line assembly of the invention illustrating the various components thereof and their positions relative to each other; Figure 2 is an enlarged front view of the unwind stand or reel support of the assembly line machinery of Figure 1; Figure 3 is a side view of the unwind stand of Figure 2; Figure 4 is an enlarged top view of the thermal barrier feeder of the assembly line machinery of Figure 1; Figure 5 is a front view of the feeder of Figure 4; Figure 6 is an enlarged front view of the guide box and support frame of the assembly line machinery of Figure 1; Figure 7 is a section along line 7-7 of Figure 6 and shows the configuration or cross-sectional shape of the metal members to be joined with an insulating member and the position of the metal members in the guide box; Figure 8 is an enlarged front view of the stitcher or crimping machine of the assembly line machinery of Figure 1; Figure 9 is an enlarged top view of the take-off unit of the assembly line machinery of Figure 1; Figure 10 is a front view of the take-off unit of Figure 9; Figure 11 is an enlarged perspective view of a reel support arm; Figure 12 is a sectional view taken along line 12-12 of Figure 5 illustrating the measuring means or section of the thermal barrier feeder; Figure 13 is a sectional view taken along line 13-13 of Figure 5 illustrating the drive means or section of the thermal barrier feeder; Figure 14 is a sectional view taken along line 14-14 of Figure 8 illustrating a stitching or crimping means or station of the stitcher or crimping machine; Figure 15 is a sectional view taken along line 15-15 of Figure 8 illustrating a guide means or station of the stitcher or crimping machine; Figure 1 is an end view taken along line 16-16 Figure 10 illustrating the dump arm mechanism of the take-off unit with a finished thermal barrier extrusion or member thereon in position just prior to activation; and, Figure 16A is a view similar to that of Figure 16, but with the dump arm in a raised position to discharge the finished thermal barrier member.

Referring now to the drawings, especially Figure 1, the various components or units comprising the complete machinery line assembly or apparatus and their relative position or relation to each other are illustrated. Each of the various units is in alignment with the other so as to provide the basis for a continuous operation. The assembly comprises five basic units, a reel or unwind stand 20, a reel or thermal barrier feeder 30, a guide box unit 40, a stitcher or crimping unit 50, and a take-off unit 60. The machinery is especially adapted to install a thermal barrier or insulating material in aluminum extrusions or shapes to provide a unitary thermal barrier shape or thermal break construction element. The apparatus is particularly adapted to make a type of thermobreak construction wherein the ther mal barrier is stitched or crimped in place.

Such an element is especially useful in the minufticture of aluminum windows, doors, frames therefor, curtain walls and the like.

In the operation of the apparatus, a reel of thermal barrier material 21 is positioned on the unwind stand 20. One end of the reel 21 is inserted in the feeder 30 which feeder constitutes means for inserting the insulating material between the metal members.

The thermal barrier insulating material is preferably a vinyl or foamed PVC. Any other suitable type of material may be used. The cross-section shape of the material is of a size and shape to be received by or inserted in a pair of appropriately designed metal shapes or members 70 and 71.

Two metal or aluminum shapes 70 and 71 are properly positioned on a guide box 41 of the guide box unit 40 by an operator. The metal shapes are then slid into the feeder 30 and properly positioned therein to receive the thermal barrier material. Shapes are customarily about sixteen feet in length, but may be of any length desired. A foot switch (not shown) actuates a clamp 31 which holds the aluminum shapes 70 and 71 in position.

A pair of drive wheels 32 and 33 are actuated and feed the barrier portion 21a into the shapes 70 and 71. The length of the material or barrier 21a inserted is controlled by a pre-set or pre-determined setting on a counter connected to a measuring wheel 34 riding on the barrier. The barrier or insulating material comes off the reel as it travels through the feeder until the pre-set length is reached. The drive wheels then stop and a knife 35 is actuated which cuts or separates the barrier section 21a in the aluminum shapes 70 and 71 from the reel 21 and the clamp 31 is released. The operator then inserts the combination of metal shapes 70 and 71 and barrier section 21a into the stitcher 50. A first stitch or crimp station 51 of the sticher 50 causes the metal on one side of the barrier 21a to be crimped thereon. The combination is continued through the stitcher without any further help from the operator. As the combination passes through a second stitch station 52, the metal on the other side of the barrier 21a is crimped thereon. The completed thermal barrier construction element or shape T is moved or driven in the direction indicated by arrow A where it is received by the take-off unit 60. As the finished part or element T clears the stitcher 50, an electric eye (not shown) located between the stitcher 50 and the take-off unit 60 actuates dump arms 61 and 62 causing the arms to raise and slide the finished part T into a basket or other suitable receptacle. Once the operation has been started, the operator does not have to move from the one location by the feeder. As soon as the combination clears the guide box into the stticher, the operator places another pair of metal shapes on the guide box and slides them into the feeder to provide a substantially continuous operation.

Referring now to Figures 2 and 3 of the drawings, the reel stand or unwind stand 20 basically comprises a frame 22, a shaft 23 mounted thereon, a mounting plate 24 mounted on one end of the shaft 23, a plurality of radial arms 25 mounted on the mounting plate 24, a reel support arm 26 mounted on each radial arm 25, a locking rod 27 pivotally mounted on each reel support arm 26 and a brake disc 28 mounted on the other end of the shaft 23. The frame 22 comprises a plurality of frame members welded or otherwise joined together including a pair of spaced apart base members 22a, four vertical frame members 22b and, a pair of base frame members 22c paralleledly spaced apart and joined togetherwith vertical support members 22b and upper side frame members 22d, e. It can be appreciated that the frame 22 may be varied in construction and that the particular frame illustrated is merely exemplary.

The shaft 23 is mounted on the frame 22 by means of a pair of pillow blocks or bearings 29 mounted on each of the shaft support frame members 22d. The shaft is freely rotatable within the bearings. The caliper disc brake 28 includes a disc hub 28a, brake disc 28b and brake caliper 28c. Any suitable caliper disc brake may be used. The locking rode 27 are pivotally mounted on the reel support arms 26 by means of a hinged pin 26a. The arms 26 also include a positioning pin 26b which enables the rods 27 to be locked in either a horizontal position as illustrated or a vertical position ninety degrees from the horizontal one. Figures 2 and 3 of the drawings illustrate the locking rods 27 in position for receiving a reel of insulating material 21. After the insulating reel has been positioned on the arms 26, the rods 27 are raised to a vertical position and locked in place as seen in Figure 1.

Referring to Figure 11, a portion of reel support arm 26 is illustrated showing a locking rod 27 pivotally mounted therein.

The reel support arm 26 has an opening 26c cut therein for receiving the rod 27. The member 26 is conveniently a channel member, and the portion 26c removed therefrom is removed from the web of the member 26.

Other types of construction are of course suitable. The reel support arm 26 also has suitable opcnings therein in the flanges thereof for receiving the hinge pin 26a and the pusitioning pin 26b. The rod 27 also has suitable holes or (openings therein for receiving pins 26a and 26b, respectively. The rod 27 is pivotally mounted on the hinge pin 26a so it may be raised from a horizontal position to a vertical position in the direction of the arrow E. A nut 26d secures the hinge pin 26a 011 the arm 26. When the positioning pin 26b is in the position illustrated in Figure 11. the rod 26 is locked in a horizontal or longitudinal position with the reel support arm 26. To place a reel of insulating material on the unwind stand 20, each of the rods 27 are placed in the position as illustrated in Figure 11. After the reel has been placed on the support arms 26, the positioning pin 26b is withdrawn and the rod 27 moved in the direction of the arrow E to the vertical postilion shown in Figure 11. The positioning pin is then inserted in the holes in the arm 26 from which it was previously removed. thus locking the rod in a vertical position and thus maintaining the reel 21 on the unwind stand 2(). Any other suitable reel support mechanism or apparatus may be used as desired.

The details of the feeder 30 are seen in Figures 4 and 5. The feeder includes a frame a a motor 37 mounted thereon, a speed reducer 38 mounted on the motor with a suit b'e srnrocket and chain assembly for d! iX il t! : upper and lower drive wheels 32 ant c, r "oectively. an input guide 39, measu - 7 wheel R4, drive wheels 32 and 33, a knife 35 all a clump 31. all of which are suitably mounted on the frame 36. The frame 36 includes four vertical support members 36a on which are mounted a front plate 36b. a rear plate 36c, a base plate 36d and connecting bars 36e. Any other suitable framing mechanism may be used to provide the support for the various components of the Feeder 30.

The clamp assembly 31 includes clamp air cylinder 31a. a cylinder rod 31b. a jam nut 3lc, a clamp 31d. a clamp guide 31e, an extrusion or shape support 31f and an extrusion or shape positioning plate 31g.

The angle iron extrusion support member 3lf has a pair of slots 31h therein and is mounted on the front plate 36b by means of a plurality of socket head cap screws 31i or other suitable fasteners. The extrusion support 31f may be moved vertically to a desired position to support the base of the extrusions 70 and 71 in a desired position.

The extrusion positioning plate 31g is in a fixed position and so located between the knife unit 35 and clamp assembly 31 that when the shapes 70 and 71 are abutted thereagainst, the shapes are in a proper position for receiving. the insulating member 21a. The air cylinder 31a actuates the cylinder rod 31b so that the clamp 31d and clamp guide 31e thereon are moved into holding contact with the shapes 70 and 71 to hold them in the desired position during the insertion operation. The air cylinder 31a has an air line 31j (partially shown) for connecting the air cylinder to a suitable valve and air supply.

The knife or knife assembly 35 includes an air cylinder 35a, a block 35b for holding same, a cylinder actuated rod 35c, a jam nut 35d and a jam nut 35e positioned on the rod 35c, a knife holder 35f mounted on the end of the rod 35c and a knife 35g positioned in the knife holder 35f. The air cylinder block 35b is mounted on the front plate 36b. A cutting block 35h is also mounted on the front plate 36d. An air line 35i (partially shown) connected to a suitable valve and air supply provides air to the air cylinder 35a for actuating the knife blade 35g for cutting or severing the insulating barrier 21a when an appropriate signal is given thereto.

The base plate 36d has an opening 36d' for receiving a drive chain 32a connecting the drive wheels 32 and 33 with the motor 37.

The lower drive wheel 33 is mounted on a shaft 32b positioned in bearing blocks 32c and 32d fixed on rear plate 36c and front plate 36b, respectively. A drive sprocket 32e is mounted on the drive shaft 32b for receiving the drive chain 32a. The lower drive wheel 33 is mounted on the end of the shaft 32b which extends through a suitable opening therefor in the front plate 36b.

The upper drive wheel 32 is mounted on axle 32f mounted in front plate 36b. The upper drive wheel 32 is adjustable so as to accommodate various sizes of insulating material or barriers. Such mechanism inclides a bcit holder 32g mounted on the front platt 6b and a bolt 32h, a slide block 32i and sl es 32j suitably positioned thereon. The drive wheels 32 and 33 advance the barrier member 21a in the direction of the arrow B so as to insert the member 21a into the shapes 70 and 71.

Additional details of the drive wheels 32 and 33 are seen in Figure 13. Upper drive wheel or drive unit 32 is mounted on the plate 36b. Lower drive wheel or drive unit 33 is mounted on the shaft 32b which extends through an opening in the plate 36b.

The unit 32 includes a drive gear 32k having teeth 32k' thereon which is mounted on bushing 32m in which axle bolt 32f is positioned therethrough and inserted into movable slide block 32i. Slide block 32i is slidably mounted in slide 32j which is fixed to plate 36b. A thrust beanng 32n is also positioned on the axle 32f between the head of axle 32f and drive gear 32k. barrier drive wheel 32p having teeth 32p' thereon is fixed to the drive gear 32k so as to move therewith. The bolt holder 32g is fixed to the plate 36b above the slide 32j and has an opening 32g' therein for receiving the bolt 32h. fle bolt 32h also extends into and is fixed to the movable slide block 32i. Nuts 32q are appropriately positioned on the bolt 32h so itS to retain the bolt in a desired position on the bolt holder and in the slide block. 13y adjusting the nuts 32(1, the slide block 32i may be moved vertically within the slide 32 j so that the drive wheel 32p will be in an pppropriate position for driving the insulating barrier material 26a on the top side thereof.

The drive shaft 32b has a hub 33a thereon positioned in a bushing 33b in a bushing support member or bearing 32d mounted on plate 3hub. A drive gear 33c having teeth 33c' thereon is mounted on the hub 33a on shaft 32b and meshes with gear 32k so as to drive the gear 32k. Drive wheel 33d on hub 33a and having teeth 33d' thereon moves as shaft 32b rotates and drives the underside of barrier 26a.

The measuring wheel 34 is also mounted on the front plate 36b in a suitable manner on a shaft 34a connected to a suitable electrical pulse generator 34b, also mounted on the front plate 36b. The input guide 39 is also mounted on the front plate 36b.

Referring now to Figure 12, the details of the measuring wheel 34 are illustrated. A pulse generator mounting block 34c is affixed to front side plate 36b by means of a bolt 34d through suitable openings in the plate 36d and mounting block 34c, respectivelv. The pulse generator 34b having a shaft 34a is mounted on the mounting block '.4c. A shaft extender 34a' is affixed to the shaft 34a and held in place thereon by means of a set screw 34e. The plate 36b has an opening 36b' therein for receiving the shaft extender 34a'. The measuring wheel 34 is positioned on the shaft extender 34a'.

A movable guide block 34f is mounted on the plate 36b below the measuring wheel 34 by means of a pivot bolt 34g and a pivot bolt nut 34h. The side plate 36b has a suitable opening 36b" for receiving the pivot bolt 34g. The movable guide block 34f has an opening 34f' therethrough sufficiently large to permit vertical movement of the block 34f when the nut 34h is loosened. The block may be moved to accommodate a particular size of insulating material or barrier. The block 34f also has a suitable opening 34f" for receiving the barrier or insulating material 26a. Also mounted on the plate 36b below the guide block 34f is a spring holding block 34i. The block 34i has an opening 34i' for receiving the spring bolt material. The flanges or portions 70a and 71a of the members 70 and 71, respectively, are in their pre-crimping or pre-stitching position. The metal shapes are therefore illustrated in the shape in which they are normally extruded or otherwise prepared.

Referring now to Figure 8, the stitcher or crimping machine 5(1 includes a first stitch station or unit 51. a second stitch station or unit 52, a plurality of guide block assemblies 53, 54 and 55 and an ejector station 56 mounted on side plates 57 and 57' mounted on a basc plate 57" mounted on support members 58. Additionally, the stitcher 50 includes a combination motor and reducer unit 55) suitably mounted on the underside of the base plate 57" with a drive chain 59a.

The chain tensioner 59b is also mounted on the base 57 by means of a mounting block 59c.

The ejector station 56 includes a toothless drive wheel 56a and a lower idler wheel 56b and adjusting screws 56c. The ejector station 56 receives the metal members with barrier crimped therein and ejects the extrusion or finished part T out of the stitcher 50 and also straightens the element T.

The guide blocks 53, 54 and 55 are substantially identical and are adjusted for a particular shape of element. The guide blocks are removable and an additonal series of guide blocks may he placed in the stitcher for accommodating shapes of configurations other than those illustrated. The stitch stations 51 and 52 are fixed in the machine and remain the same for each identical operation. The stitch stations are adjustable to accommodate particular shapes. Details of the stitch stations and guide stations are seen in Figures 14 and 15.

Referring now to Figure 14, a stitch station is illustrated in detail. Stitch station 51 is mounted on side plates 57 and 57' and base :,late 57" of the stitcher 50. The stitch station 51 includes an upper fixed position 51a and a lower movable portion 51b. The upper portion 51a includes a drive shaft Sic which has a drive sprocket 51d on one end thereof for receiving the chain 59a. The shaft Sic has a stitch or crimping wheel 51e fixed thereto with spacers 51f and 51f' on either side thereof. Bearings 51g and 51g' support the shaft in the stitcher and are mounted in side plates 51h and Sih', respectively. A pair of snap rings 51v and 51v' are positioned on the shaft Sic adjacent bearings 51g and six', respectively. Holding bars 51i and 51i hold the upper portion 51a in position to the stitcher 50. The lower movable portion or backup block 51b includes side plates 51j and 51j' in which are mounted bearings 51k and 51k' for supporting the backup wheel shaft 511. Backup wheel 51m having hub 51m' is mounted on the shaft 511 and fixed thereon by means of shaft key 51n. A pair of snap rings Sip and 51p' are also positioned on the shaft 511 adjacent bearings 51k and 51k', respectively. A cross brace 51q connects or joins the side plates Sij and Sly'. The lower or backup wheel 51m is movable 'ind controlled by means of an air cylinder 51r mounted on the stitcher base plate 57" by means of bolts 57a or other suitable means. The plate 57" has an opening 57b therein for receiving the air cylinder shaft 51r' which is mounted to a cross plate 51s. As the air cylinder shaft 51r' is actuated up or down, the block 51b is moved therewith so that an operator may vary the backup force for a particular stitching or crimping operation depending upon the particular metal members being stitched or crimped. Movement of the block Sib constitutes one method of adjusting the illustrated crimping station to accommodate metal members of other shapes. The stitch wheel and backup wheel are both hardened steel rollers with the stitch wheel having teeth thereon. The stitch wheel 51e is grooved or so constructed that only one metal member is crimped as the metal members 70 and 71 pass therethrough.

The stitch station 52 is similarly constructed to the stitch station 51, except that the wheel 51 e is so constructed that the other metal member is crimped. As illustrated in Figure 14, the stitch wheel 51e is shown crimping the flange 71a of the member 71. The flange 70a is crimped by the stitch station 52.

The guide station or guide box assembly 53 is seen in detail in Figure 15. The guide station is also mounted in side plates 57 and 57' and base plate 57" of the stitcher 50.

The guide stations are made as a separate block unit and each station has an upper block 53a and a lower block 53b. The upper block 53a includes a pair of side plates 53c and 53c' joined together in a spaced apart relationship by cross brace 53d. The shaft 53e is mounted in bearings 53f and 53f' positioned in side plates 53c and 53c', respectively. A pair of snap rings 53y and 53y' are positioned on the shaft 53e adjacent bearings 53f and 53f', respectively. A pair of guide wheels 53g and 53h are mounted on the shaft 53e. A key 53i enables the guide wheels to be locked in a predetermined position or the shaft 53e. The positioning of the guide heel is one way of accommodating metal members of other shapes. A pair of spring guide posts or pins 53j and a pair of spring guide posts or pins 53j' are mounted on the top of side plates 53c and 53c', respectively. Holding bars 53k and 53k' are also positioned on side plates 53c and 53c', respectively. Each guide post has a spring 531 thereupon. The guide posts or pins are not connected to the holding bars, but are positioned therein through holes in the holding bars therefor. The pins pass through the holding bars when the block 53a is raised. The springs are held in position by the pins and act to push the upper block downwardly. As the metal shapes pass through the machine, the upper block is raised slightly, compressing the springs.

The lower block 53b includes side plates 53m and 53m' joined together by cross brace 53n. A shaft 53p is mounted in bearings 53q and 53q', respectively, mounted in the side plates 53m and 53m', respectively. A pair of lower guide wheels 53r and 53s are mounted on the shaft 53p and spaced apart therefrom each other and retained in a predetermined position by means of key 53t. A fixed side guide yolk 53n is mounted on the inside of side plate 53m' and includes an axle 53n' on which roller 53n" is positioned. A movable side guide yolk 53v is mounted on guide bolt 53v' positioned in a suitable opening therefor in side plate 53m. Yolk 53v includes an axle 53w on which a wheel 53w' is positiond. A spring 53x mounted on the guide bolt 53v' urges the yolk 53v and the wheel 53w' thereon against the shape 71 which in turn urges the shape 71 and shape 70 against the wheel 53w'. Snap rings 53y and 53y' are also positioned on the shaft 53p adjacent bearings 53q and 53q', respectively. The guide blocks are readily removable and permit a rapid change out from one shape to another.

The guide blocks position the metal shapes in a proper location for crimping.

The guide wheels are illustrative of one particular type. It can be appreciated that they may be of any suitable type as desired.

Such wheels are preferably made of a material such as a phenolic resin, vinyl or other suitable material which does not damage the metal shapes. The various guide wheels also have set screws therein for fixing ti. heels ;ieels to their respective shafts in a desired predetermined position to accommodate the metal members to be guided.

Guide stations 54 and 55 are similarly constructed to guide station 53 and are also removable from the stitcher 50. For any particular operation, all of the guide stations are of identical construction and have their wheels set in a similar position.

The guide stations before each stitching station hold the metal shapes and barrier therebetween in proper alignment for each successive crimping or stitching operation.

Guide stations and stitch stations can be so constructed and assembled that stitching or crimping can be conducted on whichever metal member or side of metal member desired. The last guide station guides the metal shapes with barrier material locked therein or therebetween into the ejector station or unit. The ejector station not only ejects the finished part from the stitcher or stitcher assembly to the take-off unit but also straightens the finished part thereby correcting any distortion which may have occurred during the stitching operation.

Referring to Figures 9 and 10, the take-off unit 60 includes dump arms 61 and 62 mounted on a shaft 63 held by bearings 64, conveniently mounted on frame support members 65 and 66. In addition to the vertical members 65 and 66, frame 60' includes end vertical support members 67 and horizontal joining framing members 68 and additional horizontal joining members 69 and 69'. A roller conveyor 60" is mounted on the support members 68 and 67. An air rotary actuator 90 is mounted on a motor base plate 91 mounted on vertical support members 66 of the frame 60'. The rotary actuator 90 has a shaft 90a extending therefrom on which is mounted a gear 92 which drives a gear 93 mounted on the shaft 63. An air valve 94 is also mounted on the plate 91. The roller conveyor operates in the customary manner, and some of the rollers are further spaced apart than others to provide an area for pivotal movement of the dump arms 61 and 62. The dump arms 61 and 62 are affixed to the shaft 63; and, as the shaft is rotated when appropriately actuated or driven by the actuator 90, and raises the arms from a horizontal position to a raised position so that a member T thereon will slide off of the unit 60 and into a suitable receptacle.

Referring now to Figures 16 and 16A, a completed thermal barrier shape T is illustrated in position on the take-off unit 60 prior to activation of the dump arms and in position after the dump arms have been activated. Dump arm 62 is shown in a raised position in Figure 16A wherein the finished part T is moved from the position shown in Figure 16 to the position shown in Figure 16A and hence into a basket or other suitable container. Dump arm 62, as well as dump arm 61, is raised or lowered by means of gear 93 fixed to the shaft 63 which is caused to rotate in the direction of the arrow C by action of the smaller gear 92 rotated in the direction of the arrow D and fixed to the air rotary actuator shaft or rod 90a actuated by the air valve 94. The air valve 94 is connected to a suitable air supply source by means of lines 95 and 95'. It can be appreciated that the frame of the take-off unit or the take-off unit itself can be of various constructions. It is only essential that rollers or other suitable means be provided for moving a finished part thereon and that a dumping mechanism or some other means be provided for removing the finished part from the take-off unit.

Although a take-off unit of some type is preferred, the finished parts can be manually handled, if desired. Such a manual operation would not be as efficient and would probably require the services of an additional person to receive the finished parts as they are ejected from the stitcher.

Metal shapes are preferably extruded aluminum shapes, but any other suitable metal or various made metal shapes may be used. The term aluminum includes all aluminum and aluminum alloys employed or capable of being employed in the manufacture of windws, doors, frames therefor, curtain walls, and the like and in the building or construction industry in general.

Such metals shapes may be of various lengths, and may be of any desired configuration in cross-section as long as they are so constructed as to receive a barrier material and have portions thereof which can be crimped onto the barrier material after it has been inserted.

The insulating material or barrier is preferably made of plastic. Any other suitable materials may be used which have the desired characteristic of thermal conductivity, strength, and rigidity. Although a material of sufficient flexibility that it can be made into reels or rolls is preferred, material of greater rigidity can be used. In such case. lengths of barrier material would have to be fed into the means for inserting the insulating material by hand or some other suitable means.

WHAT WE CLAIM IS: 1. Apparatus for making a unitary thermal break contruction element having metal members spaced by an insulating material comprising a guide means for holding the metal members, means for inserting an insulating material between the metal members. whilst they are held in the guide means. crimping means for receiving the metal members with the insulating material tllereill and for crimping each metal mem be; said crimping means including a pluralitv of alterr,ating guide stations and crimping stations with a guide station being positioned before each crimping station to guide the two metal members and the slating material therebetween into a desired position in the following crimping station, including a removable guide block assembly adjustable for accommodating metal members of various cross-sectional configurations, and each of said crimping stations being adjustable for accommodating metal members of various crosssectional configurations.

2. Apparatus as claimed in claim 1, including a means for supplying the insulating material to the means for inserting the insulating material.

3. Apparatus as claimed in claim 2, therein said insulating material supply means includes a frame, a rotatable reel mounted thereon for receiving a reel of insulating material and means for locking the reel of insulating material on the rotatable reel.

4. Apparatus as claimed in claim 2, wherein said insulating material supply means includes a frame, a rotatable shaft mounted on said frame, a plurality of radial arms mounted on said shaft so as to move therewith, a reel support arm on each of said radial arms for together receiving and supporting a reel of insulating material and a pivotally movable locking rod mounted on each of said reel support arms for locking the reel of insulating material on the reel support arms.

5. Apparatus as claimed in any preceding claim, wherein said means for inserting the insulating material includes a frame, drive means for receiving the insulating material and feeding the insulating material into the metal members, measuring means for defining a pre-determined length of insulating material to be inserted into the metal members, means for severing the pre-determined length of insulating material after the length of insulating material has been inserted into the metal members, and clamp means for holding the metal shapes in a desired position for receiving the length of insulating material.

6. Apparatus as claimed in any preceding claim, wherein said guide means includes a frame and an elongate body mounted thereon having a groove thereon extending longitudinally the length thereof for receiving the metal members therein to position them for receiving the insulating material.

-7. Apparatus as claimed in claim 6, wherein the elongate body provides a plurality of parallel longitudinally extending grooves for receiving metal members of a variety of cross-sectional configurations.

8. Apparatus as claimed in any preceding claim, wherein said crimping means includes a first crimping station for crimping one metal shape and a second crimping station for crimping a second metal shape or a second part of the same metal shape.

9. Apparatus as claimed in any preceding claim, wherein an ejector means is positioned liter the last crimping station for receiving metal shapes and insulating material crim ' therein from said last crimping station a--- ejecting the unitary thermal break construction element from the crimping means.

10. Apparatus as claimed in claim 9, wherein said ejector means includes means for straightening the unitary thermal break construction element.

11. Apparatus as claimed in any preceding claim, including a take-off means for receiving said unitary thermal break eon- struction element and transferring it to a

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. operation would not be as efficient and would probably require the services of an additional person to receive the finished parts as they are ejected from the stitcher. Metal shapes are preferably extruded aluminum shapes, but any other suitable metal or various made metal shapes may be used. The term aluminum includes all aluminum and aluminum alloys employed or capable of being employed in the manufacture of windws, doors, frames therefor, curtain walls, and the like and in the building or construction industry in general. Such metals shapes may be of various lengths, and may be of any desired configuration in cross-section as long as they are so constructed as to receive a barrier material and have portions thereof which can be crimped onto the barrier material after it has been inserted. The insulating material or barrier is preferably made of plastic. Any other suitable materials may be used which have the desired characteristic of thermal conductivity, strength, and rigidity. Although a material of sufficient flexibility that it can be made into reels or rolls is preferred, material of greater rigidity can be used. In such case. lengths of barrier material would have to be fed into the means for inserting the insulating material by hand or some other suitable means. WHAT WE CLAIM IS:

1. Apparatus for making a unitary thermal break contruction element having metal members spaced by an insulating material comprising a guide means for holding the metal members, means for inserting an insulating material between the metal members. whilst they are held in the guide means. crimping means for receiving the metal members with the insulating material tllereill and for crimping each metal mem be; said crimping means including a pluralitv of alterr,ating guide stations and crimping stations with a guide station being positioned before each crimping station to guide the two metal members and the slating material therebetween into a desired position in the following crimping station, including a removable guide block assembly adjustable for accommodating metal members of various cross-sectional configurations, and each of said crimping stations being adjustable for accommodating metal members of various crosssectional configurations.

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7. Apparatus as claimed in claim 6, wherein the elongate body provides a plurality of parallel longitudinally extending grooves for receiving metal members of a variety of cross-sectional configurations.

desired location.

12. Apparatus as claimed in claim 11, wherein said take-off means includes a frame, a plurality of rollers thereon for receiving thermal barrier construction elements from the crimping means or ejector means and dump means on said frame for transferring the elements from the take-off means to a suitable receptacle or desired location.

13. Apparatus for making a thermal break construction element substantially as herein before defined with reference to and as shown in the accompanying drawings.

14. Apparatus for crimping two spaced apart metal members onto an insulating material to thereby provide a unitary thermal break construction element, comprising a frame mounting a plurality of alternating guide stations and crimping stations thereon, a guide station being positioned before each crimping station to guide the two metal members and insulating material therebetween into a desired position in the following crimping station, each guide station including a removable guide block assembly adjustable to accommodate metal members of various cross-sectional configurations, and each of said crimping stations being adjustable for accommodating metal members of various cross-sectional configurations.

15. Apparatus as claimed in claim 14, comprising ejector means positioned after the final crimping station for receiving and ejecting the metal members crimped to the insulating material from the apparatus to a desired location.

16. Apparatus for crimping two spaced apart metal members onto an insulating material substantially as hereinbefore described with reference to and as illustrated in Figures 8, 14 and 15 of the accompanying drawings.

17. A method of making a thermal break construction element, which comprises crimping metal members onto a strip of an insulating material, using apparatus as claimed in any one of claims 1 to 16.

18. A method as claimed in claim 17 and substantially as hereinbefore defined with reference to the accompanying drawings.

19. A thermal break construction element when made by a method as claimed in claims 17 or 18.

20. A door, window, or curtain wall which includes a thermal break construction element as claimed in claim 19.