Патент USA US2112720код для вставки
March ‘29, 1938. C. STOCKSTROM 2,112,720‘ TUBE FORMING MACHINE Filed Nov. 4, 1935 4 Sheets-Sheet l NR N ATTOB/YE Y March 29, 1938. c. STOCKSTROM 2,112,720 TUBE FORMING MACHINE Filed Nov. 4, 1935 4 Sheets-Sheet 2 35Q%, //Y VE/YTO/B C424 ‘from: m 0M ATTOB/YE'Y March 29, 1938. ' 2,112,720 c. STOCKSTROM TUBE FORMING MACHINE 4 Shéets-Sheej; 3 Filed NOV. 4, ‘1935 MN 1 BY March 29, 1938. 2,112,720 c. STOCKSTROM TUBE FORMING MACHINE Filed Nov. 4, 1955 4 Sheets-Sheet 4 MW m EL w? mm.7 M VaA mwryZ w E 4 y _Patented 29,1938‘ ~ - 2,112,720 v UNITED, STATES PATENT orrica ‘ .rzzrzzezrxm. I Application ram 4,( This invention relates generally to tube-forming machines, and more specifically to an improved machine for forming tubes made from ?exible materials, such, for instance, as paper, 5 cellulose tissue, celluloid, fabric, rubber, etc., the predominant object of the invention being ' to provide ‘an improved machine of this type which includes adjustable means, which may ' be adjusted even while the machine is running 10 if this be necessary, so as to regulate the width of tubing formed by the. machine. ' No. 48,088 Fig. 5 is an enlarged cross-section taken on line 5-5 of Fig. 3. Fig. 6 is a sectional elevation of the glue-ap plying mechanism of the machine. ' Fig. 7 is a rear elevation of the mechanism 5 shown in Fig. 6. , _ Fig. 8 is a fragmentary section taken on line H of Fig. 6. Fig. 9 is an enlarged, fragmentary view, partly in section and partly in elevation, of the braking 10 means for controlling rotation of the roll of paper All of the previously known tube-forming machines with which I am familiar included each a number of sets of tube-forming elements, which 15 had to be maintained on hand for producing tubing of various widths with the aid of the ma- or other material from which the sheet of ‘mated rial is drawn to produce the tubing, and of the mil shaft adjusting means. Fig. 10 is a section taken on vline ‘IO-40 of i6 ' Fig. 9. . ~ chine. In other words, if tubing of a certain Fig. 11 is an enlarged, fragmentary sectional widthvwas to be produced on one of these pre- plan taken on line li-ll of Fig. 3. viously known tube~forming machines, a certainFig. 12 is a fragmentary, sectional view illus set of forming elements would be associated with trating Part Of the machine When the same is 20 the machine, and when it was desired to produce arranged for Producing square 0!‘ rectangular tubing of a different width the set of forming elements previously used would have to be re- moved from the machine, and another set of 25 forming elements adapted to produce tubing of the desired width would have to be associated with the machine. » ' ‘The invention disclosed herein eliminates the need for a number of sets of forming elements type tubing. ' . _ Fig’. 13 is a section taken on line l3—-l3 of Fig. 12 and looking in the direction indicated by the arrow. A a Fig. 14isafragmentary rear elevation of aper tion ofthe structure ‘shown in Fig. 12. I Fig. 15 is an enlarged cross section taken on line l5--i5 of Fig. 12. 30 for producing tubing of various widths, this deIn the drawings, wherein are shown for the 30 ~ sirable end being attained by providing the im- ' purposeof illustration, merely, two forms of the proved machine with forming elements which are permanently associated with the machine, and invention, A designates the improved machine generally. The maehineAincludes a rectangular which are adjustable so as to provide for pro- . frame 01' bed. which is made up 01' longitudinally 3.3 ducing tubing of different widths even while the extended channel elements i and transversely 36 machine is running, if this be required. Thus extended channel elements 2; these longitudi in the use of'the improved machine there is no nally and transversely extended elements being necessity to perform the time-consuming tasks of replacing the forming elements every time it suitably secured together to provide a rigid frame 01' bed structure- The longitudinally extended elements I and 2 are supported by suitable legs 40 4c is desired to change the width of the tubing being formed, but instead it is merely necessary for the operator of the machine to rotate a hand wheel, in a manner to be hereinafter explained, _ to change the adj?stment of the forming "ele_ 4" ments in order to produce tubing of the desired width; . , l Fig' 1 1s a‘ side elevation of the improved ma chine - _ to “1132288 a‘ plan View of ‘the machine illustrated 3- sllpperted by and extended upwardly from the frame 01' bed of the machine is a super?'ame structure 4 made “P °f vertically disposed angle bars 5, secured adJacent to their‘ lower ends to the bed of the machine’ and horizontally at‘ ‘5 ranged bars 6,6’, and '| ?xed to the vertical bars adjacent to the tops thereof and extended lon gitudinally and transversely of the machine. Fixedto the opposed longitudinally extended elements I of the frame or bed of the machine A 50 " is a pair of bearings 8 (Figs. 1, 2,.and 3) which Fig 3 is an enlarged longitudinal section taken support a shaft 9 that; is extended transversely on line 3—3 0f Fig- 2of the machine. The shaft 9 supports a roll Ill Fig. 4 is a cross section taken on line H o! of paper or other material from which a sheet 55 Fig. 3. ‘ of material S is drawn, said sheet of material 55 2 9,119,790 being passed through the tube-forming parts of because the screw-threads'of said adjusting screw the machine in a manner to be hereinafter de are in engaging relation with respect to the screw scribed to produce tubing. The roll of material threads within the opening 23’ formed through the extension 23 of the element 22”, the shaft will be moved as desired. Also the clamping device 22 I0 is wound about a hollow core ii (Fig. 2) 6 rthrough which the shaft 9 passes, said shaft having ?xed thereon tapered elements l2 which are driven into the opposite ends of the core so serves as a braking device for the shaft 9, as by tightening the elements 22IL and 22” against the as to frictionally engage same, after which said shaft, with the aid of wing nut 21, rotation of said elements l2 are secured to the shaft 9 through shaft may be retarded in proportion to the'pres sure exerted against the shaft by the elements 10 ' the instrumentality of the set screws i2’. Thus the roll of material It) is ?xed to the shaft 9 for rotation therewith, the shaft rotating in the bear ings 3 as the sheet of material S is drawn from said roll during operation of the machine. The 15 sheet'of material S passes about guide rollers l3 and I4, as shown to the best advantage in Fig. 3, the guide roller l3 being supported by the op posed longitudinally extended elements -I and the guide roller 14 being supported by horizon tally disposed elements I! extended from the rearmost vertical elements 5 of the superframe structure of the machine to elements 32. In order to provide for shifting the shaft 3 longitudinally of its major axis so that the roll 25 of material l9 may be moved transversely of the machine to properly position said roll of material, the machine includes an adjusting screw l8 (Figs. 9 and 10). This adjusting screw is supported by a bracket I‘! which is secured at H’ to one of the 30 longitudinally extending elements I of the bed ‘of I the machine (Fig. 2), and has an outer portion I1‘ in which an aperture is formed through which the adjusting screw it passes. Adjacent to this outer portion I'll of the bracket a collar i3 is .5 ?xedly mounted on the adjusting screw i6, and at the extreme outer end of said adjusting screw 9. hand wheel 19 is ?xed thereto. The hub of the hand “wheel l9 and the collar I8 contact with opposite faces of the .v outer portion ll‘ of the 40 bracket I], so that said adjusting screw is pre vented from moving longitudinally, and also the inner end of the adjusting screw is provided with a smooth faced, reduced end portion it’ that ex tends into an aperture 29 formed in the longitudi nally extended element i that supports the bracket l‘l, whereby said adjusting screw is supported for rotary movement by said longitudinally extended 22'l and 221‘. Located adjacent to the guide ,roller I4 is an elongated glue receptacle which extends trans versely of the machine, as shown in Figs. 1, 2, 3, 6, and 7. The glue receptacle 29 is supported for limited sliding movement on a pair of spaced ' angle elements 30, said angle elements being sup ported at their opposite ends by elements 3|, which are ?xed at their forward ends to the rear most vertical elements I of the superframe struc 20 ture of the machine and at their rearmost ends by members 32 which are fixed to the’ elements 9 and to the longitudinally extended elements I of the bed of the machine. The glue receptacle 29 is capable of being moved transversely of the ma chine through the operation of an adjusting rod 33 which is provided with an enlarged, screw threaded portion 33'. This adjusting rod is sup— ported for rotation by the opposed elements 3 l , as shown in Fig. 7, said rod being provided with a hand wheel 34 for operating same, and the glue receptacle having a downwardly extended ele ment 35 which screw-'threadedly engages the screw-threaded portion 33' of the rod 33. By rotating the adjusting rod 33 the glue receptacle may be moved transversely of the machine to de sired locations. Secured to the glue receptacle 29 at opposite ends thereof are upstanding elements 35'~which support at their upper ends a horizontally dis 40 posed angle element 36. The angle element 36 has ?xed thereto by means of a set screw 31 a hinge member 38, to which a downwardly extend ed element 39 is hinged at 40. The element 39 is substantially L-shaped when viewed as illustrated in Fig. 6, inasmuch as said element includes an extension 39' which is extended at‘ an approxi element l and the outer portion ll3 of the bracket I‘I. Fixedly mounted on the shaft 9 at a point above 50 the adjusting screw I6 is a pair of spaced collars 2|, and mounted on said shaft in a position be tween said collars is a clamping device 22. The clamping device 22 is comprised of an element 22‘ mate right angle with respect to the main body portion of said element. The element 39 is pro with complementary curved seats which contact with the shaft 9. Also the element 22b is provided with the sheet of material S as said sheet passes vided with a boss 4i which supports a pin 4|’ on which aglue-distributing disk 42 is mounted for rotation, the lower portion of the disk 42 being 10 cated within the glue receptacle, so that it passes, , through glue therein during rotation of the 'disk. and an element 22!’, said elements being provided . Also, the peripheral edge of the disk 42 contacts. - with an extension23 to which a bolt 24 is hingedly attached at 25, and the element 22‘ is provided 60 with a wing 26 having an open-end slot that re ceives thebolt 24. The bolt 24 has mounted thereon a wing nut 21 which is adapted to be screwed against the wing 26 of the element 22*‘ in order to move said element 22* and 22'’ into 65 clamping engagement with theshaft 9. The ele ment 22b of the clamping device 22 is provided with a downwardly projected extension 28 which is provided with a screw-threaded opening 23’ formed therethrough, through which the adjust 70 ing screw l9 extends. When, in the use of the machine, it is desired ' to shift the shaft 9 longitudinally of its major axis so as to properly position the roll of material I! transversely of the machine, the hand wheel 75 is is rotated to rotate the adjusting screw 16, and about the guide roller l4 (Fig. 3), whereby said disk is frictionally rotated by the moving sheet. The disk 42 has associated with it a glue scraper 43 which is so shaped as to embrace an edge por 60 tion of the disk, as shown to the best advantage in Fig. 8. The glue scraper includes a portion’44 which is slidabiy mounted on the portion 33' of the element 39, said portion 44 being formed about said portion 39' in embracing relation with respect thereto. The portion 44 of the glue scraper is .providedqvith an outwardly extended lug 45 having a screw-threaded opening formed therethrough, which receives a. screw-threaded portion of a rod 49, said rod being supported for rotary movement by a bracket‘46' and having a weight 41 mounted thereon which is adjustable to different positions on the rod and is ?xed in positions to which it is adjusted by a wing nut 41', The weight 41 through the action of gravity 75 2,119,790 moves the peripheral face of the disk 42 into close contact with the sheet of material S,'and by ro tating the rod 46 the scraping edge 43' of the glue scraper may be moved toward and from the peripheral edge of the disk so as to regulate the amount of glue applied to the sheet S by the disk 42.- . The illustrated embodiment of the improved machine includes a glue reservoir in the form of 10 an inverted bottle 48 which is supported by a 3 tudinally extended elements of the superframe 7 structure 4 of the machine, and said rod extends through apertures formed'through the upper por tions of elements 56 which are secured to the heads 50 and extend upwardly therefrom. The elements 56 have associated therewith bracket elements 51 which are secured to the elements 56 at the points designated by the reference charac ter 58. The elements, 51 are inclined outwardly and downwardly, as shown in Fig. 4, and at the 19. suitablesupporting structure 48'. Leading from _ lower ends thereof vertically disposed portions51' the inverted bottle 48 is a glue conductor 48b are provided through which openings are'formed, whose discharge'end is located within the glue the rod 5|’ being passed through said openings. receptacle 29 (Fig. 3), said conductor being pro It is obvious that the heads 50 are adequately supported for free movement transversely of the 15 15 vided with a valve 480 which is adapted to con trol ?ow of glue from the inverted bottle 48 to ‘ machine by the rods 5|, 5|’, and 55, the bracket the glue receptacle 29. In order to provide suili elements 51 assisting in maintaining said heads ' _ cient air pressure within the upper portion of in their proper positions. The means for adjusting the heads transversely the inverted ‘bottle 48 to cause the glue to flow 20 therefrom through the conductor 49”, an air pipe of themachine comprises a rod 59 which is sup 20 49 is employed (Fig. 2), this air pipe leading from ported iorrotation by oppositely disposed angle 26 a suitable source (not shown)‘ of air under slight pressure to the upper portion of the inverted elements 60 (Fig. 4) . The adjusting rod 59 is pro bottle, as, shown to the best advantage in Fig. 3. tate rotation of same, and said rod includes an Supported by the superframe structure of the enlarged intermediate portion 59' which is pro vided with right and left screw-threads desig nated, respectively, by the reference characters machine is a pair of heads 50 which are mounted for sliding movement on a pair of rods 5| and 5|’ which extend transversely, of the machine, as shown to the best advantage in Figs. 2 and 3. 30 The rods 5| and 5|’ are mounted in supporting elements 5|a (Fig. 2) formed on or ?xed to the opposed side elements of the superframe struc ture 4, and also these rods pass through openings videdat one end with a hand wheel 6| to facili- ' 598 and 59". The intermediate portion 59’ of the adjusting rod 59 passes through screw-threaded openings formed through the heads 59, the part of said intermediate portion provided with right hand screw-threads being extended through the‘ screw-threaded opening of one of the heads, and located adjacent to the lower ends of vertically 'the part of said intermediate portion provided 35 disposed elements 52, which are secured at their with left-hand screw-threads being extended, upper ends to the element 6' that extends lon gitudinally of the superframe structure 4 at the approximate transverse center of the machine (see Fig. 2). The heads 59 are relieved or cut 40 away as indicated at 53 in Figs. 2 and 3 to pro vide cavities in which the lower portions of the elements 52 are received when the ‘heads are brought together at the center of the machine. The heads 50 are shaped as shown to the best ad vantage in Figs. 2, 3, and 4; that is to say, each of said heads includes a portion 50" which extends‘ longitudinally of _ the machine which'is‘provided with openings formed transversely therethrough through which the rods 5| pass, and at the rear through the screw-threaded opening of the other head. Obviously, rotation of the adjusting rod 59 will cause the heads 59 to move toward .or from each other, depending on the direction of rotation of the adjusting rod, and because the 40 tube-forming elements 54 are carried by the heads, like movement will be imparted to said tube-forming elements. At the forward portion of the machine A a plate 62 is provided, which is supported by the opposed, 45 longitudinally extended elements I, and at oppo site sides of this plate slotted elements 6.3 are ?xed thereto which extend longitudinally of the forward portion of the machine. Thehslotted ele end of said longitudinally extended portion 5|!a _ ments are secured adjacent to their opposite ends 50 each head includes a downwardly extended por to the plate 62 by means of fastening devices 63', tion 5|)b provided at its lower end with a down said slotted elements being raised slightly above wardly and rearwardly inclined portion 59°. , the top face of the plate 62, as shown in Fig. 4, ~Fixed to the heads 59 are elongated tube by suitable spacing members. Slidably secured to iorming elements 54 which are in the general form of narrow, elongated plates that extend in substantial parallelism forwardly of the machine. The forward portion of the forming elements are substantially horizontal, or parallel with respect 60 to the bed of the machine, and adjacent to their rearmost ends said forming elements include up wardly inclined portions 54“, as shown to the best advantage in Fig. 3. From the rear ends of the upwardly inclined portions 54‘l of the form ing elements forwardly projected portions 54b are extended, which at their forward ends are turned upwardly as indicated at 54° in Fig. 3. ‘The form ing elements are secured to the heads 50 at their portions 54“, and said forming elements contact with and are ?xed to the inclined lower faces of the angular portions 50¢ of said heads. In order to assist in supporting the heads 59 for movement'transversely of the machine, a rod 55 is provided. This rod, as shown in Fig. 4, is 75 supported at its opposite ends by opposed, longi the slotted elements 63 are tube-forming mem bers 64, the connections between said tube-form ing members and said slotted elements being pro duced by bolts 55 whichpass. through the slots of said‘slotted elements and through apertures formed through the tube-forming members,‘ as 60 illustrated in Fig. 4. Obviously the end portions of the tube-forming members 64 may be moved ‘longitudinally of the slotted elements 63 to de sired positions, in which positions said members 64 maybe secured by tightening the bolts 65. As shown to the best advantage in Fig. 11, the inner end portions of the tube-forming members 64 overlie the tube-forming elements 54, and said inner end portions of said tube-forming members I '64 are maintained at their proper elevation by ' adjusting screws 65, which pass through screw threaded openings formed through the tube forming'members and contact with and rest upon the top face of the plate 62. In order to main 4 2,112,790 ' tain the adjustment of the adjusting screws 66, each thereof is provided with a lock nut 68'.‘ The improved machine includes guide pins 81 which under certain circumstances may be em ployed to aid in guiding the sheet of material into‘ proper relation with respect to the tube-forming elements and members. Each of these-pins is supported by a head 68 which is mounted for sliding movement on a pair of rods 60 which ex 10 tend transversely of the machine and are sup ported by the longitudinally extended elements I. The head 6. of each guide pin ‘1 is provided with a downwardly extended portion 10, which is pro vided with a screw-threaded-opening formed other. The forward end of the tubing is then drawn outwardly by hand to a suitable power driven reel (not shown) with which the forward end portion of the tubing is associated, so that the tubing will be wound thereon when the reel is rotated._ The reel is then placed in opera tion, and the sheet 8 is drawn by ‘said reel from the roll "I and is formed by the tube-forming elements 54 and the tube-forming members 64, and is then wound upon the reel. As already 10 stated herein, the disk 42 applies a line of glue to the sheet 8, and because the glue receptacle which supports said disk may be adjusted trans versely of the machine by the adjusting rod therethrough, and an adjusting rod ‘ll having 3!, the disk may be adjusted to apply glue to 15 right-hand screw-threads 'H‘ and left-hand_ any desired location on the sheet 8. Also, as screw-threads ‘l I" is extended through the screw shown in Fig. 2, the angle element 36 is provided threaded openings formed through the portions with a plurality of the hinge members 38, and 10, the right-hand screw-threads being extended the disk and its associated parts may be shifted‘ through the portion ‘I. of one head “and the from one thereof to anotherv to obtain different 20 left-hand screw-threads being extended through positioning of the disk, or if desired in producing the portion 10 of the other head 68. The- ad - certain types of tubing, more than one glue lusting rod ‘H is supported for rotation by the applying disk may be employed. opposed, longitudinally extended elements I, and It will be noted that the machine shown in said adjusting rod is provided at one end with a Fig.1 includes a shaft 10 which corresponds with 'hand wheel ‘I! which facilitates rotation of the the shaft 9 already referred to herein. This adjusting rod. It is apparent that when the ad shaft ‘16 has associated with' it the same parts , justing rod 1| is rotated the right and left-hand and elements described in connection with the screw-threads thereof cause the guide pins to move toward or from each other, depending on the direction of rotation of said adjusting rod. Outward movement of the heads 68 with respect shaft 8, and said shaft 18 is intended to support a second roll of material when tubing to be pro duced is of multi-wall or two-piece structure. When a second roll of material is used in pro to each other is limited by a bar 68‘ which is . ducing tubing, the sheet drawn therefrom\may ?xed to one of the heads and is provided with a pass over the .guide roller 11 and then move longitudinally extended slot through which a pin ill’ carried by the other head extends (Figs. 2 and 11). When the end 88° contacts with the pin 68!‘, further continued movement of the heads over“ roller ll with the sheet-of material S drawn 35 from the roll l0 into tube-forming relation with ‘I is prevented. ' At the forward end of the machine a presser element 13 is provided which contacts with the top of the tubing as it moves from the ma chine. This presser element ‘I8 is of elongated, tubular formation as, shown in Figs. 1, 2, and 3, and it is attached to an arm .14 which is provided respect to the tube-forming elements 54 and the‘ tube-forming members 84. In Figs. 12, 13, 14, and 15a structure is illus trated which is employed in producing tubing of 40 the square or rectangular type. _In producing such tubing an extra pair of tubing-forming ele ments 8! is employed. ‘These forming elements 80 include narrow, elongated ‘plate portions ex tending longitudinally of the forward portion of at its upper end with a slot 14'. The ‘arm 14 the machine at points slightly above the narrow, is secured to the longitudinally extended ele-‘ elongated plate portions of the tube-forming ment 6' of the superframe structure by a suit able fastening device 15 which passes through 50 the slot 14' and is screwed into a screw-threaded elements 54, as shown in Figs. 12 and 15. The tube-forming elements ll are supported by rods ‘ II, which are extended through openings formed aperture formed in said element 6'. Because of - through portions of the heads II, said rods hav the slot ‘II’ the arm 14 may be secured to the ing downturned portions ll’ (Fig. 12), thelower element-6' in various positions so as to posi tion the presser element in diil'erent locations 65 longitudinally of ‘the extreme forward portion of the machine. when the machine A is to be placed in opera tion, the sheet of material 8 is drawn through the machine by hand and the forward portion of the sheet is moved under the elongated tube-form ing elements 54, the opposite side portions 5‘ of said sheet then being drawn upwardly ‘about the opposite outer side edges of the tube-forming elements 54 and folded inwardly so'that their inner edge portions are in overlapping relation, as shown at S” in Figs. 5 and 11. The tube forming members 64 are then positioned as shown in Fig. 11, where they contact with the top faces of the inwardly turned' portions of the ends of which are inclined rearwardly and down wardly. The tube-forming elements ll are ‘se cured to the downturned portions of the rods 8|, and upwardly and rearwardly inclined portions of ,said elements contact with the lower faces of the. downwardly and rearwardly inclined lower portions of said rods. Each head 50 is provided with a clamping screw 02 for clamping the as sociated rod 8| ?xedly in position with respect thereto. Also, each rod II has clamped there to a member 83 (17185.12 and 14) which is pro- . vided with a portion 83’ that overlaps a side face of the associated head, and each portion 83' supports an adjusting screw u that contacts with the adjacent side face of the associated head Bl. The members 83 are each provided with'a slit 8!" to provide portions which clamp the as 70 sheet of material S. The sheet of material S _ sociated rod 8|, and these clamping portions are 70 which is so drawn through the machine by hand drawn into clamping contact with the rod by a has had a line of glue applied to it by the disk screw ll“. ' ' ‘ 42, and this’ line of glue, which is located be In order to produce accurately formed square tween the overlapped edge portions of the sheet, 76 causes said sheet portions to adhere 'to each or rectangular type tubing the forming elements 80 must be precisely positioned with respect to 75 5 2,112,720‘ ‘the forming elements 54, and such fine adjust 84 are maintained in close contact with the heads of heads, means for supporting said heads for adjustment transversely of the machine, a pair of vertically spaced tube-forming elements car ried by eachoi said heads, means ioradjusting one tube-‘forming element of each pair of tube iorming elements with respect to the associated tube-forming element, means for locking the ' 58 by contact of the paper with the tube-forming adjustable tube-forming elements in adjusted elements 88, hence rotation of the adjusting 10 screws in either direction produces rotary move positions, screw-threadedmeans for moving said heads and said tube-forming elements trans ment may be obtained by manipulating the ad iusting screws 84 infcontact with the heads 50 so as to rotate the rods 8| and thereby move the tube-forming elements 88 'to the desired posi tions. The inner ends of the adjusting screws ment of the rods 8| in one or the other direc tion. When the rods 8| have been adjusted to desired positions they may be clamped in such positions by the screws 82. > In producing square or rectangular type tubing plates 84 are employed whose inner edge por tions are interposed between the narrow, elon gated plate portions of the tube-forming ele ments 54 and 88, as shown in Fig. 15. These 20 plates are supported by arms 85 which are at tached to said plates at their inner ends and are ?xed at their outer ends-to the slotted elements versely of the machine so as to provide for pro ducing tubing of various widths, and tube-form ing members co-operatively associated with said tube-forming elements. 3. A tube-forming machine including a pair of 15 heads, means for supporting said heads for ad- » justment transversely of the machine, said means including spaced elements on which said heads are slidingly supported, members secured to and ‘extended from said heads, and an element slid elements carried by said heads, means for mov 68 by suitable fastening devices 85’. The pairs ing said heads and said tube-forming elements of the arms 85 at opposite sides of the plates 84 25 are connected together by arms 88, and also said plates 84 are maintained at their proper eleva tions with respect to the plate 62 of the machine‘ by means of adjusting ‘screws 81 similar to the adjusting screws 86 associated with the tube 30 forming members 64, said adjusting screws 81 at their lower ends contacting with and resting upon said plate 62 and being provided with lock transversely of the machine so as to provide for ' nuts to maintain their adjustment. The use of the machine in producing square ' 20 ingly engaged by said members, tube-forming producing, tubing of various widths, the last mentioned means including an element supported for rotary motion and provided with right-hand and'left-hand screw-threaded portions which co operativély engage said heads and are adapted to move same toward and from each other on 30 rotation of said screw threaded element, and tube-forming members co-operatively associated with said tube-forming elements. 4. A tube-forming machine including a pair of heads, means for supporting said heads for ad same as in producing tubing of the type illus-’ justment transversely of the machine, said means trated in Fig. 5, the only di?'erence being that including spaced elements on which said heads the opposite side edges of the tubing are folded are slidingly supported, members secured to and inwardly as shown in Fig. 15 through the use of extended from said 'heads, and an element slid 40 the extra tube-forming elements 80 and the plates ingly engaged by said members, tube-forming 40 elements carried by said heads, means for mov 84. It is obvious, in view of the foregoing descrip-4 ing said heads and said tube-forming elements tion of the improved machine disclosed herein, transversely of the machine so as to provide for that tubing of the type shown in Figs. 5 and 15, producing tubing of various widths, the last mentioned means including an element supported 45 45 and of various other types which 'need not be de scribed in detail herein, may be made in various for rotary motion and provided with right-hand - or rectangular type tubing is substantially the widths by merely adjusting the heads 58 trans, -' and left-hand screw-threaded portions which co versely of the machine toward or from each other, this being accomplished by mere rotation of the 50 hand wheel 6| shown in Figs. 1 and 4. Thus the necessity that a number of sets of tube forming elements for producing tubing of differ ent widths be maintained on hand is entirely eliminated, and the operation of producing ma 55 chine-made tubing is greatly. simpli?ed. Also, in the use of the improved machine, if the tubing being produced should run slightly wider or nar rower than desired, the heads 50 may be adjusted while the machine is operating to correct the 60 error in the tubing width. I claim: . -' ' 1. A tube-forming machine including a pair of heads, means for supporting said heads for ad justment transversely of the machine, a pair of 65 vertically spaced tube-forming elements carried by each of said heads, means for adjusting one tube-forming element of each pair of tube-form- ‘ ing elements with respect to the associated tube forming element, means for moving said heads 70 and said tube-forming elements transversely of the machine so as to provide for producing tub ing of various widths, and tube-forming members co-operatively associated with said tube-forming elements. I 2. A tube-forming machine including a pair operatively engage said heads and are adapted to move same toward and fromfeach other on. rotation of said screw threaded element, tube 50 forming members co-operatively associated with' said tube-forming elements, and means for ad justabiy securing said tube-forming members in place. . - 5. A tube-forming machine including a pair 55 of heads, means for supporting said heads for adjustment transversely of the machine, said means including spaced elements on which said heads are slidingly supported, members-secured to and extended from said heads, and an ele~ ment slidingly engaged by said members, tube forming elements carried by said heads, means for moving said heads and said tube-forming ele ments transversely of the machine so as to pro vide for producing tubing of various widths, the 65 last-mentioned means including an element sup ported for rotary motion and provided with right hand and left-hand screw-threaded portions which co-operatively engage said heads and are adapted to move same toward and from each 70 other on rotation of said screw-threaded ele ment, tube-forming members co-operatively as sociated with said tube-forming elements, and means including slotted members extended longi 4 2,112,790 tudinally oi’ the machine for adiustably secur ing said tube-forming members in place. 6. A tube-forming machine including a pair of heads, means for supporting said heads for ad justment transversely of the machine, said means including spaced elements on which said heads are slidingly supported, members secured to and extended from said heads, an element slidingly engaged by said members, and brackets ?xed to said members and arranged in sliding relation with respect to one of said spaced elements, tube i’orming elements carried by said heads, means for moving said heads and said tube-forming ele ments transversely of the machine so as to pro 15 vide for producing tubing of various widths, the last-mentioned means including an element sup ported for rotary motion and provided with right hand and left-hand screw-threaded portions which co-operatively engage said heads and are 20 adapted to move same toward and from each other on rotation oi’ said screw-threaded element, and tube-forming members co-operatively asso ciated with said tube-forming elements. 7. A tube-iorming machine including a pair of 25 heads, means for supporting said heads for ad ,iustment transversely oi’ the machine, said means including spaced elements on which said heads ‘are slidingly supported, members secured to and extended iromsaid heads, an’ element slidingly engaged by said members, and brackets ?xed to said members and arranged in sliding relation with respect to one of said spaced elements, tube iorming elements carried by’ said heads, means for moving said heads and said tube-forming ele ments transversely of the machine so as to'pro vide for producing tubing 01' various widths, the last-mentioned means including an element sup ported for rotary motion and provided with right- ‘ hand and left-hand screw-threaded portionswhich co-operatively engage said heads and are adapted to move same toward and from each other on 15 rotation of said screw-threaded element, and tube-forming members co-operatively associated with said tube-forming elements, said spaced ele ments being supported at their opposite ends and having a supporting member associated with each 20 thereof at its approximate center, said-heads be ing provided with recesses which receive said supporting members when the heads are drawn inwardly to the limits of their movement. CARL BTOCKB'IROM; '