US1872152A

US1872152A - Mechanism for forming spirally wound multisided tubes

Info

Publication number: US1872152A
Application number: US448925A
Authority: US
Inventors: Sidney T Maltby
Original assignee: Stone Straw Corp
Current assignee: Stone Straw Corp
Priority date: 1930-05-01
Filing date: 1930-05-01
Publication date: 1932-08-16
Anticipated expiration: 1949-08-16

Description

1932- s. T. MALTBY 1,872,152

MECHANISM FOR FORMING SPIRALLY WOUND MULTISIDED TUBES Filed May 1, 1930 4 Sheets-Sheet 1 1 2a i /22 i f I i 2 l 1 t I g. J k

awn kw Ja'dney 23M??? as v 1% W 1932- s. T. MALTBY 1,872,152

MECHANISM FOR FORMING SPIRALLY WOUND MULTISIDED TUBES Filed May 1, 1950 4 Sheets-Sheet 2 gmentq'c dam/M 6 55 r: WWMW Aug. 16, 1932 s. T. MALTBY I 1372:1512

MECHANISM FOR FORMING SPIRALLY WOUND MULTISIDED TUBES Filed May 1, 1930 4 Sheets-Sheet 5 gwuentoz Aug. 16, 19 32. ALT Y 1,872,152

MECHANISM FOR FORMING SPIRALLYWOUND MULTISIDED TUBES Filed May 1, 1930 4 Sheets-Sheet 4 gwoemtoz Patented Aug. 16, 1932 UNITED STATES PATENT oFFicB SIDNEY r. MALTBY, .OEWASHINGTON, nISTnIcr on COLUMBIA, ASSIGNOR To STONE STBAW CORPORATION, OF WASHINGTON, DISTRICT OF COLUMBIA, A

OF DELAWARE,

MECHANISM r03, FORMING SPIRALLY WOUND MULTISIDED Tunas Application filed May 1, 1930. Serial No. 448,925

The bed of a tube making machine as onto the mandrel, to be wound thereon by its rotation, a frame carrying rollers adapted to bear against the respective facesof the mandrel passing therethrough, of driving means for rotating the frame and mandrel, and gearing actuated by the driving means for rotating the feed rollers to form a tube and continually strip it from the end of the mandrel therebeyond, together with means for adj usting the feed rollers to accommodate mandrels of different size; all'as will be described hereinafter in greater detail,--and as claimed.

It is an object of my invention to provide mechanism for rotating a multi-sided mandrel to spirally vwrap a tube thereon, such mechanism further serving to form a multisided tube and to strip it from the mandrel.

A further object is to provide for adjusting such tube forming and stripping mechanism so that mandrels of various sizes can be accommodated.

Other and further objects will be apparent from the following description and drawings, in which Figure 1 is a side view of the tube forming and stripping mechanism comprising this invention;

Figure 2 is a vertical sectional view taken through the axis of the mechanism but showing the mandrel in full lines;

Figure 3 is a sectional view taken along the line 3-3 of Figure 1, in the direction of the arrows;

Figure 4 is an enlarged detail sectional view taken along the line 4-4 of Figure 6;

Figure 5 is a top view showing the arrangement of the mandrel and tube winding and stripping mechanism together with one form of feed for the tube material;

Figure 6 is a sectional View taken along the line 66 of Figure 1;

Figure 7 is a sectional view taken along the line 7-7 of Figure 1.

ings.

Referring more particularly to the-draw spaced upright supports 11 and 12'bolted or otherwise affixed thereto in any suitable manner. K i

The upright the support of bearings 14' (shown in Figure 2 for the purpose of illustration as ball bearings) which in turn receive and support the hub 15 of a plate 16and the hub 17 of a plate 34, respectively.

A drive shaft 19, beneath the bed of the machine'has gears 20 and '21 keyed thereto, the gear'20 driving a gear 18 which is rotatable on the hub 17 throughan intermediate gear 22, j ournalled in the bed of the machine, while gear 21, through an intermediategear 23, also journalled in the bed of the machine, drives a gear 24 which is keyed to the hub 15,

A gear 25'is keyed to gear 18'to rotate therewith upon hub'17, and is in mesh with

pinions

26, 27, 28 and 29 on the

shafts

30, 31, 32 and 33, which pass through the

parallel plates

34, 35, so and 16'.

supports'have bosses 13 for coRPoaA'rroN' As is shown in Figures 3 and 4 thelplate 35 has a projecting boss 37 which receives a ball bearing for the support of shaft 30, such boss extending freely through an arcuate slot 38 in plate 34 (see'Figure 3). The plate36, also, is slotted as at 39 for the free passage of the shaft'therethrough.

At its opposite end the shaft is j ournalled in the shouldered hub 40 of an adjustable feed roller bearing which comprises an elongated base 41 with spaced projecting

beara ings

42 and 43, between which a feed roller 44 is mounted to rotate with a stub shaft 45. Y

A bevel pinion 46 is secured to the shaft 30 and is meshed with a similar pinion 47 affixed to the stub shaft 45, thereby to drive shaft 30 as a pivot and thereby adjusted to accommodate mandrels of difierent size, as will be more fully described hereinafter.

The shaft 32, driven by pinion 28, is mounted in thesame manner as shaft 30 and carries a bevel pinion 54 in mesh with bevel pinion 55 on shaft 56 which carries a roller 57 between spaced

ears

58 and 59 projec ing from a base 60. The base 60 is pivoted on shaft 32 and at its opposite end is bored to receive a headed bolt 61 which passes through an underlying arcuate slot 62 in the plate 16, the arc of the slot being struck on a radius from the shaft 32. A nut 64 on the bolt serves to hold the roller 57 in adjusted position.

The intermediate plate 36 is arcuately slotted at 65 and 66 to permitfree passage of the

shafts

30 and 32 therethrough and to permit'adjustment of the

plates

16 and 35, with the

shafts

30 and 32 which they mount, about their common axis relative to

plates

34 and 36. Shafts 31 and 33, shown 180 apart and each spaced 90 from the shafts .30 and 32, are

journalled in plate 34 but pass freely through arcuate slots (not shown) in the plate 35. As shown inFigures 1 andv 6, shaft 31mounts a bevel pinion 67 in mesh with a bevel pinion 68 on a shaft (not shown) which carries a roller 69 between spaced

ears

70 and 71 extending from a base 72 which is pivoted on shaft 31. An extension of the base opposite the driving gear is formed with a hole for receiving a headed bolt 73 which also passes through an ar'cuate slot 74 in the plate 36 and is fastened by means of a nut 75. The radius of curvature of the slot 72 has its origin in the axis of shaft 31. 7

Similarly, shaft 33 carries a bevel pinion 76 meshing with a similar pinion 77 on a I shaft (not. shown) which extends between

ears

78 and 79 projecting from a base 80 and between which a roller 81 is mounted, fast on the shaft, the base being pivoted on the shaft 33. A projecting portion of the base 80,.re1note from the drive gearing, receives aheaded bolt 82 which also passes through an arcuate slot 83 in the plate 36 and is fastened by a nut 84. Thus,

therollers

69 and 81 can. be adjusted about their respective drive shafts by adjustment of the

bolts

73 and 82 in the arcuateslots 74 and 83 ofplate 36 to be moved toward and away from each other without, however, disturbing their parallel relationship. r

' The

rollers

44, 57, 69 and 81 are preferably, though not necessarily longitudinally .grooved to present a roughened gripping surface for stripping a tube from the mandrel.

- -

Bracing members

85 and 86 are fastened to the peripheries of the

plates

34, 35, 36, and 16. Two of such members are shown but it is to be understood that any number desired may be provided. The

members

85 and 86 which are tapped into the plate 34 and screws 89, 9O tapped into the plate 36 (Figure 5). Member 85 is transversely slotted as at 91 and 92, and member 86 is correspondingly slotted for the reception of

screws

93, 94, 95 and 96, respectively.

When it is desired to adjust the mechanism for accommodating a mandrel larger than that shown in thedrawings the

rollers

69 and 81 on plate 36 are first swung about their

respective drive shafts

31 and 33 after loosening the nuts and 84. The rollers are adjusted to parallelism any desired distance apart. Y r r The

nuts

93, 94, 95, 96 are then loosened and the plate 16 (with its attached plate 35) is moved in a counter-clockwise direction about its axis, as seen in Figure 7. The

shafts

30 and 32 are thus moved away from the vertical plane passing through the axis of the plate.

Nuts

53 and 64 are now loosened and the rollers brought to parallelism with their arcs at right angles to the axes of

rollers

69 and 81, in the form of structure shown in .to parallelism and squared with the rollers on plate 36.

' .It is to be understood that this invention is not confined to the use of two series of rollers as shown, but may include as many rollers as the mandrel has faces, one or more.

rollers for each face, or any number of duplicate series of rollers for each face, as desired.

Referring now to Figure 5 wherein is shown a preferred mounting of the mecha nism above described, the mandrel 97, of rec tangular or polygonal cross-section, passes through an opening in the supporting bracket 98 which rises from the machine bed. The end 99 of the mandrel is turned to cylindrical shape and mounts a radial bearing 100, car ried by the bracket.

The cylindrical end of the mandrel is threaded to receive a nut 101 between which and the outer face of the bracket is clamped a thrust bearing 102.

This showing of the mandrel mounting is simply by way of illustration. Any suitable mounting which will permit rotation of the mandrel bv the mechanism'hereinbefore describedmay be used.

The number of strips used in the windingof a tube is a matter of selection, but for example I have shown three strips, two of which are fed onto the mandrel from one side and engaging over its upper surface, while the third strip is fed from the other side and engages under the mandrel. A glue pot 103, diagrammatically shown in Figure 5, has mechanism for applying adhesive to the under surface ofone of the two strips which pass over it.

In operation of the mechanism, rotation of gears 23 and 24: causes a rotation of the rollercarrying frame. Simultaneous rotation of gears 22 and 18 in the same direction but at a lower speed causes the

pinions

26, 27, 28 and 29 to rotate about the gear 25. If it is desired to rotate the

pinions

26, 27, 28 and 29 faster and thereby increase the speed of the feeding

rollers

44, 57, 69, 81 it is only necessary to lock the gear 18 against rotation or to rotate it in a reverse direction. It is, there fore, to be understood that my invention contemplates the provision of variable speed mechanism for selective use under different conditions.

From the foregoing it will be apparent that this invention provides a forming and stripping mechanism for angular sided tubes which mechanism, constituting the drive for the mandrel in its rotation to wrap the tube relieves the mandrel of torsional strains and constitutes a support for its free end.

What I claim as my invention is 1. A machine for wrapping tubes comprising anon-translatable mandrel, means for feeding tube material onto said mandrel to be wrapped thereon and cylindrical means engaging said mandrel beyond the zone of wrapping for rotating said mandrel and stripping a formed tube therefrom.

2. A machine for wrapping tubes comprising a multi-faced, non-translatable mandrel, means for feeding tube material onto said mandrel to be wrapped thereon, and cylindrical means adjustably pressing against the faces of said mandrel beyond the zone of wrapping for rotating said mandrel and stripping a formed tube therefrom.

3. A machine for wrapping tubes comprising in combination with a multi-faced, nontra-nslatable mandrel, a frame through which said mandrel passes, means for rotating said frame and means for transmitting the motion of the frame to the mandrel, said means comprising a cylindrical roller angularly adjustable on the frame to engage a face of the said mandrel whereby the axis of the roller will be maintained parallel with the surface of the mandrel which said roller contacts.

4. A machine for wrapping tubes comprising in combination with a multi-faced, nontranslatable mandrel, a frame through which said mandrel passes, means for rotating said frame, a pair of cylindrical rollers with axes angularly adjustable on said frame to engage said mandrel and be maintained in parallelism with the faces thereof which said rollers contact, and gearing for driving said rollers by rotation of the frame.

5. In a machine for wrapping tubes, a

rotatable mandrel, means for feeding strips rollers on the respective plates having their axes inclined to the others, a member connecting the plates of the series to permit rotary adjustment of some of them relative to the others, thereby to vary the positions of the rollers on respective plates, and gearing for rotating all of the plates as a unit.

6. In a machine for wrapping tubes, a rotatable mandrel, means for feeding strips of tube material onto said mandrel, a rotary frame adapted to drive said mandrel, said frame comprising a plurality of axially.

aligned plates with central openings through which the mandrel freely extends, pairs of spaced rollers carried on the faces of certain of said plates and adapted to support said mandrel, the rollers on each plate being angu- Jlarly adjustable relative to the others, shafts gearedto the individual rollers, said shafts being journalled in the plates carrying rollers which they drive but passing freely through slots in-the other plates, a driving gear, pinions on said shafts in mesh with said gear, a member fastened to said plates whereby they will be rotated in unison, some of the plates being adj ustably retained by said member thereby to vary the positions of the rollers on respective plates and thus provide for accommodation of different size mandrels, and gearing for rotating the frame as a. unit.

In testimony whereof, I affix my signature.

SIDNEY T. MALTBY.