US1433291A

US1433291A - Method of making rubber tubes

Info

Publication number: US1433291A
Application number: US446080A
Authority: US
Inventors: Joseph G Moomy
Original assignee: MARY H MOOMY
Current assignee: MARY H MOOMY
Priority date: 1921-02-18
Filing date: 1921-02-18
Publication date: 1922-10-24
Anticipated expiration: 1939-10-24

Description

1. G. Moon/IY. METHOD 0F MAKING RUBBER TUBES.

APPLICATION FILED FEB. 18' |921- Pmma oct. 24v,

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Patented @et 24h (1922..

l JOSEPH G. IVIEO-lllI`,` F ERIE, YENNSYLVANIA, ASSIGNOE TO MARY 1:11. m1003113?, 0F ERDE,

, PENNSYLVANZEA. l v i l l METHOD `OF WIAKING: RUBBER TBES.

Application. filed February 18, `1921. Serial No. 443,030.

To all fio/tom 'it may concern:

Be `it known that JOSEPH G. Mooivrr, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and `use-- ful improvements in the Methods of Making Rubber Tubes, of which the following is a specification.

The invention is particularly designed for 1.0 forming inner tubes for pneumatic tires. In forming such tubes there are more or less losses due to the trapping of air on the poles on which the tubes are formed and also from the wear or deterioration ofthe wrapping i5 duck which is commonly used while the tube is being vulcanized. With the present method and apparatus the tube is rolled on a pole and the pole is heated so as to make the rubber forming the tube more plastic and also so as to expand any untrapped air or moisture. The tube is` wrapped, the wrappingremaining on the tube while warm and the material being plastic the' edge of the material from which the tube is formed is smooth. After the tube is cool while in the wrapping and before the vulcanizing the wrapper is removed. This permits of an inspection of the tube showing whether there is any trapped air ormoisture and if so it may be readily removed. The tube is then vulcanized without the wrapping.

This is possible because of the initial heat-` `ing which tends to shrink the tube on the pole also the initial wrapping which has formed the tube.

ln the drawing l have shown an apparatus for carrying out the method as follows Fig. 1 shows a plan View of the machine.

Fig.` 2 an enlarged view of the spindles. p

Fig. 3 a front elevation.

1 marks the frame of the machine, 2 the driving head of the machine, and 3 the tail head of the machine. A driving spindle 4 is mounted in bearings la in the head 2.

the hea-d 3. A brake drum 18 is mounted on the spindle 16 and subjected tolthe action of a brake band 19. The spindle 16 has the usual squared end 16a forl receiving a pole 20. A cone 21 is mounted in a spindle 21a. The spindle is carried in bearings 22 in the head 3. A spring 23 operates on a collar 24 to force the cone 21 forward. This pole is inserted and removed as the pole 11.

The spindle l has a fluid connection 25, the spindle being hollow and provided at its end with a stuffing box 26 for receiving the connection. An exhaust connection 27 `eX- tends into the spindle 21a, this spindle also being hollow and provided with a stufng box 28 to receive the connection. Steam is controlled in the connection 25 by means of a valve 30. A rod 31 extends along the machine by means of which steam may be turned onor turned off from the connection. The spindles 16 and 21;L are also hollow and have the connections 32 and 33.

ln carrying out the method with the apparatus thetube is rolled up on the pole 11. The pole 11 is placed in the machine and steam turned into the pole to heat the same. The pole iswrapped with a wrapper 34, the clutch being utilized to control the rotating movement of the spindle to bring about the wrapping in the usual manner. Preferably the wrapping is accomplished by unwrapping the wrapper from the pole 20, tension being given to the wrapper through the action of the brake 18. The heat delivered to the pole is sufficient to warm the stock to a plastic condition sothat the edge of the stock which is being rolled is smoothed out on the pole. Further the heating shrinks the wrapper on the pole so as to form a smooth inner surface for the tube. The Wrapping also puts the wrapper under pressure as it is warm. The tube with the wrapping on is allowed to cool and then the wrapper is removed preferably directly from this pole to a second pole. Afterwards the tube is vulcanized, the partial forming of the tube and preliminary heating of the tube retaining the rubber in shape on the pole. This method permits of the inspection of the tube prior to the vulcanization and the removal of any air or moisture. As the pole is heated and Wound any Vapor or air is ordinarily carried 'forward and discharged at the end of the tube at'the completion of the Wrapping but if therel is any indication ot trapped air or vapor the tube may be punctured at the point and Wrapped so as to eure the defect. In this Way there is practically no loss in the forming of tubes.

` What I claim as new is l.. The method of making rubber tubes which consists in forming the stock on a central form; subjecting the stock While on the form to a Warming action introduced through the form; and then vulcanizing the tube on the form.

2. The method of making rubber tubes which consists in forming the stock on a central form; subjecting the stock (o a Warming and wrapping operation: removingl the wrapping; and vulcanizing the tube on the form.

3. The method of makingr rubber tubes which consists in formingthe stock on a central form; subjecting,` the stock to a Warming and Wrapping operation; cooling the tube; removing the Wrapping; und rulcanizing the tube on the form.

et. The method of' making rubber tubes which consists in forming;` the stock on a central form; warming` the inner part of the stock through the iorin; wrapping and retaining the stock While warm; coolingr the stock; removing the wrapper; und vulcanizing' the tube on the form.

In testimony whereof I have hereunto sot my hand.

JOSEPH G. MOOMY.