US982430A - Tube-winding device. - Google Patents

Description

G. F. JENKINS.

TUBB'WINDING DEVICE.

APPLICATION rmm 001215, 1910.

Patented Jan. 24, 1911.

2 SHEETS-11313 1.

IN a li Patented Jan. 24.1911.

2 annn'rs-snnn'r 2.

u a n u I CHARLES FRANCIS JENKINS, OF WASHINGTON, DISTRICT OF COLUMBIA.

TUBE-WINDING DEVICE.

Specification of Letters Patent.

Application filed October 15. 1910.

Patented Jan. 24. 1911.

Serial No. 587,176.

To all whom it may concern:

Be it known that I, CHARLES FRANCIS JENKINS, citizen of the United States, residing at Washington, in the District of Columbia, have invented certain new and useful Improvements in Tube-\Vinding De- I vices, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to machines for winding strips spirally to form tubes and involves the use of a mandrel which has lit tle contactsurface and which itself urges the forming tube longitudinally along the mandrel.

In the accompanying drawings, Figure 1 shows the novel portion of the machine in side elevation. Fig. 2 shows the same parts in plan with strips winding upon the mandrel. Fig. 3 is a section on the line 3-3.

Fig. 4. Fig. 4 is a vertical axial section of devices seen at the left in Figs. 1 and 2.

Fig. 5 is an end view looking from the right.

in Fig. 1, a certain smooth mandrel segment being removed. Fig. 6 is a; View corresponding to Fig. 2, common winding belts being shown in position- Fig. 7 is a view analogous to Fig. 5, showing a modification. Fig. 8 is a like view showing a different modification.

In these views 1 to 4, A represents a suitable frame for supporting a winding mandrel. In this frame are revolubly mounted a central shaft 13 and surrounding this shaft and at equal distances therefrom and from each other are several shafts C all parallel to the shaft B, and like the latter all project to the right of the frame. Upon the projecting ortions of the shafts C, respectively, are fixe sleeves or hollow cylinders D, each spirally grooved to form a series of sharp ridges D analogous to screw threads. At the right, the shafts C project slightly and are revoluble in bearings in a disk E, forming one end of a drum-like segment or extension E of the mandrel in the axis of which pinious ll fixed to the ends of the shafts C, respectively, so that these shafts are all rotated in the same direction at the same speed. The set of spirally grooved cylinders taken together form a mandrel segment upon which strips I, usually of paper, are wound, the inner strip forming the inner layer of a tube and the outer strip breaking joints with the other and forming, as usual, an outer layer, the meeting faces of the two being secured together by glue or the like. \Vhatever means may be employed for winding the strips, the inner layer meets the sleeves only along numerous spiral ridges and the lines of contact are continually shifted along the inner face of the strip, and as the sharp ridges of the sleeves slightly ongage the surface, the rotation being in the proper direction, the forming tube is constantly ur -ed to the right.

\Vith the ordinary smooth cylindrical mandrel, glue often passes through the spiral crevice between the edges of the strip to the mandrel, and the slightest smearing of the mandrel thereby prevents slipping, causes the paper, if thin, to tear or become crumpled, with the'consequence that the work must be stopped until the mandrel has been carefully cleaned. With the resent mandrel this evil is practically e iminated since a little glue upon the ridges which by the rotation are positively free from any given point of contact with the tube after an instants contact, has no perceptible effect. As the formed tube advances it passes upon the drum-like extension E after the glue has slightly set, and this drum is preferably very slightly smaller than the interior of a tube which would fit over the grooved sleeves or cylinders, and is long enough to hold the tube strai ht until the setting of the glue leaves no anger or dearture from rectilineal form. Usually the ormed tube is rotated and advanced by oblique winding bolts J, without novelty. In some instances I omit alternate shafts C, and their sleeves and supply their places by fixed cylindrical segments K, Fig. 6, be-

yond the general peripheral surface of which the remaining sleeves project very slightly. I also sometimes place upon the central shaft B, Fig. 8, a sleeve or c linder D similar to those already describe and pass strips I inward between the sleeves D and allow them to wind upon this inner cylinder or mandrel forming a smaller tube; and it is quite possible to wind simultaneouslythe larger and smaller tubes. Whether the smaller tube is to be fOl'i'l'lCd. alone or the two are to be wound simultaneously, the right end .of the segment E (when this is used) is omitted and the segment is supported entirely from its left end, which is rigidly secured tothe member E. Since the rotary shafts are all supported at two widely separated points in the frameA and are held properly spaced by the member E, their resistanee to flexure is practicall sufficient to maint 'n suitable alinement 0 the. projecting pa ts.

What I claim is:

' 1. A mandrel, for spirally wound tube making, having as its outer portion a series of parallel spirally grooved cylinders equidistant externally from a common central axis.

2. A mandrel for spirally wound tube making having as its outer portion a series of paral distant externally from a common central axis combined with means for rotating all the cylinders at the same rate in the same direction.

3. The combination with a series of equal lel spirally grooved cylinders equispirally grooved parallel cylinders equidistant from a central axis, of means for rotating all the cylinders in the same direction at the same rate, and means for externally engaging and imparting rotary force to a tube wound about said cylinders.

1 The combination with a spirally grooved i central mandrel, of a series of spirally grooved cylinders equidistant from the mandrel, parallel thereto and spaced apart to allow tube stock to pass to said mandrel, and

means for rotating the mandrel and cylin- 'ders each upon its own axis.

and means for rotating all the cylinders in the same direction and at the same speed. In testimon whereof I aflix my signature 1n presence 0 two witnesses. v

CHARLES FRANCIS JENKINS.

\Vitnesses:

ROBERT CRAIG GREENE, JAMES L. CRAWFORD.

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