US1561143A - Tube-forming machine - Google Patents

Description

Nov. 10, 1925. 1,561,143

1 H. A. FABER TUBE FORMING MACHINE Filed Feb. 7, 1921 s Sheets-Sheet 1 wmas: -flrer $1 Ncv. 19,1925. 1,561,143

v H.A.FABIER.

, TUBE FORMING CHINE Filed Feb. 7, 1921 3 sheets sheet 2 J72 flezzzbr' b, flre rtJfZMer Patented Nov. 10, 1925.

UNITED STATES PATENT oFFics.

HERBERT A. FABEB, 0F CINCINNATI, OHIO, ASSIGNOB TO THE FORMICA INSULATION COMPANY, OF CINCINNATI, OHIO. A CORPORATION 0B OHIO.

TUBE-FORMING MACHINE.

Application filed February 7, 1821.

To all whom it may concern:

Be it known that I, HERBERT A. Fauna, a citizen of the United States, residing at 4614 Spring Grove Avenue, Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement'in Tube-Forming Machines, of which the following is a specification.

This invention relates particularly to a machine for forming tubing, a fabric, such as paper, which has a varnish or adhesive applied to the surface thereof.

The primary object is to provide an 1mproved machine of simple construction, which can be easily operated, and which is capable of producing a highly desirable product of great uniformity.

The invention is illustrated in its preferred embodiment in the accompanying drawings, such embodiment being particularly adapted to form tubing for insulation purposes, or for other purposes, from the fabric, such as paper, coated or impregnated ,with a phenolic condensation product varnish; The paper is dried after the varnish is applied, and in this condition the paper is passed through the machine illustrated and is wound upon a mandrel, the condensation product being fused by means of heat applied through one of the pressure-rolls. In this "manner, the pliesof paper formed by winding the paper on the mandrel are thoroughly bonded together. While the binder employed is a phenolic condensation product, it is ca able of being converted into a hard infusible and insoluble product by means of heat. Some of the heat is applied in the tube forming operation, but this is not sufficient to thoroughly convert the binder to the final infusible and insoluble state. Such conversion may be effected by baking the tubes in an oven at a temperature in the neighborhood of 100 0., or higher; or the tubes, after being formed on a mandrel, may be subjected to pressure between dies and a heated press, if desired, and the conversion of the binder to the insoluble state may be effected in the dies.

In the drawings- Fig. 1 represents a perspective view of the improved machine, the lower portion of the frame being broken away; Fig. 2, an enlarged broken plan view showing the mandrel and the pressure-rolls and portions of the slides or carriages which carry the Serial No. 443,137.

pressure-rolls; Fig. 3, a broken lon itudinal vertical section, taken as indicate at line 3 of Fig. 2; and Fig. 4, a broken'transverse vertical section, taken as indicated at line 4 of Fig. 3. f

In the construction illustrated, referring to Fig. 1, A represents the frame of the machine, said frame beingprovided with a top, or bed, A; B, a mandrel which is remova 1y supported in standardsorbearings B, B which are mounted "oi i -it top of the frame; C, a carria e or slide mounted in guides on the top 0 the frame and carrying a heated pressure-roll C disposed at one side of the mandrel; D, a carriage or slide mounted in guides on the top of the frame and earr ing pressure-rolls D and D located on t e other side of the mandrel, that is opposed to the heatedroll C, the axis of the roll D'- being above the axis of the mandrel, and the axis of the roll D being below the axis of the mandrel, while the axis of the roll C is in the same plane as the axis of the mandrel; C mechanism for shifting the carriage C and applying pressure through the roll C to the tube being wound on the mandrel; D mechanism for shifting the carriage D and applying pressure through the medium of the rolls D and D C and D, eccentric devices for shifting the position of the rockshafts of the mechanisms C and D in order that the ressure rolls may occupy the necessary position in the tube forming o ration, regardless of the size of the man rel, or of the tube being formed; E, a roll of paper carried by a drum E; F and F, uide rollers about which the paper asses rom the roll E; and F an adjustab e roll disposed near the mandrel and from which the paper passes directly to the mandrel.

The frame A. ma be of any suitable construction. In the orm shown, it comprises a suitable standard on which the top A is rigidly secured b any suitable means.

The mandrel is equip ed at one end with a handle or a crank by means of which the mandrel may be rotated to wind the coated or impregnated aper thereon. The mandrel is made readil removable from its supporting standards and B in any suitable manner. Thus, in Figs. 2 and 4, the standard B is shown as rovided with a stub-shaft 1, which is justable through the standard and may be secured in,

adjusted position b any suitable means, as by means of the c amping device 2. The stub-shaft is equipped with a hollow cone 3, which receives the end of the mandrel-shaft. When desired, the stub-shaft 1 may be shifted longitudinally in the bearing to enable the mandrel to be taken out. o The heated roll C is suitably journalled having their inner ends pivotally connected with the carriage and having their outer ends extending freely through bearing blocks 10, which are equipped with trunnions-or pivots 10, which are journalled in the free end of the arm 8; and heavy coil springs 11 encircling. the links 9 and interposed between shoulders at the inner end of said links and the bearing blocks 10, which are freely slidable on the outer ends of said links. The outer ends of the links 9 are equipped with collars 12, which are ada ted to engage the blocks 10, so that the links will serve in retracting the carriage.

The mechanism D for shifting the carriage D is of the same construction, and the parts are similarly designated.

The eccentric devices C and D are alike in construction and operation. The rockshafts 6 are, in both cases, shiftable longitudinally of the frame in elongated slots 13, with which the frame is provided. These eccentric devices comprise an eccentric shaft 14, journalled in the frame and equipped with a pair of eccentrics 15 and a pair of eccentric rods 16, connecting the eccentrics with the rock-shaft 6. The eccentric shaft is equipped with an actuating handle 17. It will be understood that when the eccentric shaft is turned in its bearings, the rock-shaft 6 will be adjusted or shifted in its bearin s, thus giving a new fulcrum point for the carriage shifting mechanism to work from. Thus, there are provided simple, ositive and easily operated devices for a justing the positions of the rock-shafts 6, and in this manner adjusting the pressure-rolls to accommodate mandrels of varying sizes or I tubes of varying sizes.

The mechanisms C and D for shifting the piessure-rolls into and out of the operative position constitute lever-and-link devices, which enable the carriages to be shifted quickly; and these devices have associated with them springs for transmitting the pressure to the'pressure-rolls, so that the pressure-rolls can yield as much as may be i am necessar as the thickness of the tube increases 1n the tube forming operation.

The carriages C and D are shown connected with the frame by means of longitudinal guides 18, as will be understood from Fl 's. 1 and 4.

he pressure-roll carriages are shown in Fig. 3 in the position which they occupy when the pressure-rolls are in position to compact the plies of paper together as the that very great force can be exerted through thesprings 11. The arms 8 may be carried slightly past the dead center and brought intoengagement with stubs 19, so that the toggle lever arrangement will be locked in position, if desired. The dotted lines in Fig. 3 show the manner in which the links 9 may be retracted to withdraw the carriage.

The paper carr ing drum E is shown provided with a riction device 20, which may be of any desired construction.

In the operation of the machine, the coated or impregnated paper passes from the'paper roll E beneath the ide roll F, thence about the guide roll F and thence over the guide r0111, from which it passes between the mandrel and the pressure-roll C, and is wound upon the mandrel. The

course of the paper is indicated by the dotted line 21 in Fig. 1. Assuming the aper to be coated or impregnated with a tusible binder, such as a dried varnish composed of a phenolic condensation product, shellac or the like, the paper may be wound upon the mandrel by turning the mandrel through the medium of the crank B; and assuming the pressure-roll to be in the position indicated in Fig. 3, the heated pressure-roll will cause the binder to be fused, and the plies of paper will be closely compacted together by the pressure-rolls as the winding proceeds. After a suitable thickness of tube has been produced, the paper is cut, the mandrel is given a few more turns, and the tube and mandrel may then be removed from the machine to enable a fresh mandrel to be inserted.

Depending upon the nature of the binder used and the character of the product being produced the tube may be treated further after removal from the tube forming machine, or it may become a finished-product in the tube forming machine. If a phenolic condensation product is employed as a binder, further treatment is desirable, either in a heated press, or in an oven or the like, which will serve to convert the condensation product to the final insoluble condition. If shellac be employed as a hinder, the tube in that the rock-shaft 6 is 10urnalled in an adjustable slide or carriage 22, connected with the guides 18; and in this modification, the rear ends of the eccentric rods 16 are connected with the carriage or shiftable fulcrum-carrier 22 by pivots 23. Also, the rock-shaft 6 is, in the modification, journalled in the shiftable support 22. The foregoing detailed description has been given for clearness of understanding only, and no unnecessary limitations should be understood therefrom, but the appended claims should be construed} as broadly as permissible, in view of the prior art.

What I regard as new, and desire to secure by Letters Patent, is v 1. In a machine of the character set forth, the combination of a mandrel, carriages mounted on opposite sides thereof, pressure- ;rolls mounted on said carriages, carriage shifting mechanisms, and means for adjusta ing the fulcrums from which said carriage shifting mechanisms operate.

2. In a machine of the character set forth, the combination of a, mandrel, carriages mounted on opposite sides thereof, pressurerolls mounted on said carriages, rock-shafts shiftably mounted on the frame, means for shifting said rock-shafts and operative connections between said rock-shafts and said carriages.

3. In a machine of the character set forth, tire combination of a mandrel, carriages mounted on opposite sides thereof, pressurerolls mounted on said carriages, rock-shafts shiftably mounted on the frame, and operative connections between said rock-shafts and said carriages, comprising arms mounted -on the rock-shafts, links extending between said arms and said carriages, and

springs interposed between said arms and said carriages.

4:. In a machine of the character set forth, the combination of a mandrel, carriages dis-' posed on opposite sides of said mandrel, rock-shafts mounted on the frame eccentric devices for shifting said rock-shafts, o erative connections between said rock-s afts and said carriages, and pressure-rolls mounted on said carriages.

5. In a machine of the character set forth, thecombination of a mandrel, carriages mounted on opposite sides thereof, pressurerolls journalled in said carriages; rockshafts shiftably mounted on the frame and operatively connected with said carriages, and eccentric devices mounted on the frame and connected'with and serving toshift said rock-shafts.

6. In a machine of the character set forth, the combination of a frame rovided at its upper portion with longitu inal guides, a mandrel having its ends journalled on said frame, a carriage mounted to move in said guides, a pressure roll mounted on said carriage and adapted to co-act with said mandrel, a suitably mounted rock-shaft equipped with an operating lever and equipped with arms, links pivotally connected with said carriage, slidable connections between said links and the extremities of said arms, and springs interposed between the carriage and said slidable connections, said links and arms affording toggle joints which may be thrown into locking position, the springs permitting recession of the carriage as the thickness of the tube being formed on the mandrel increases' I HERBERT A. FABER.

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