US1721975A - Apparatus for making tire tubes - Google Patents

Apparatus for making tire tubes Download PDF

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Publication number
US1721975A
US1721975A US305559A US30555928A US1721975A US 1721975 A US1721975 A US 1721975A US 305559 A US305559 A US 305559A US 30555928 A US30555928 A US 30555928A US 1721975 A US1721975 A US 1721975A
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United States
Prior art keywords
apparatus
sheet
member
tube
board
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Expired - Lifetime
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US305559A
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Sanderson Phillip William
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MILLER RUBBER Co
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MILLER RUBBER CO
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Priority to US305559A priority Critical patent/US1721975A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00Producing tubular articles
    • B29D23/24Endless tubes, e.g. inner tubes for pneumatic tyres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00Use of unspecified rubbers as moulding material

Description

July 23, 1929. P, wusANDERsON 1,721,975 l APPARATUS l`FOR MAKING TIRE TUBES Filed Sept. l2, 192.8

Inue nl'or;

Phillip Willia mdersnn Patented July 23, 1929.

UNT

f A ignara oFFicE. j

PHII'iLIP WILLIAM SANFRSON, 0F AKRON, OHIO, ASSIGNOR TO TI-IE MILLER RUBBER COMPANY, OF AKRON, OHIO, Av CORPORATION 0F OHIO.

APPARATUS FOR MAKING- TIRE TUBES.

Application led September 12, 1928.

My said invention concerns an improved apparatus for making rubber tubes, and particularly tubes such as are used within the outer casings of pneumatic tires.

The invention aims to provide an apparatus which will be simple, economical, and easily operated and which will dispense with the necessity of the forming cores or mandrels customarily used.

rIhe invention includes the novel appay ratus hereinafter described and particularly defined by the appended claims.

My novel apparatus is illustrated. in the accompanying drawings in which:

Figure l is a perspective view thereof.

Fig. 2 is a transverse section on line 2-2 of Fig. l showing the tube forming sheet in place preparatory to forming the tube, the supporting table being omitted for convenience of illustration.

Fig. 3 is a view similar to Fig. 2 with one side wing swung over and the margin protector removed.

Fig. 4f is a similar section illustrating the completion of the folding operation.

Referring by reference characters to these drawings, the apparatus comprises a flat tube blank supporting device of platform shape comprising a central section or member 1 and side sections 2 and 3 pivotally connected to the intermediate sections by hinges at the ends as indicated at 2a and 3a. This platform is, when unfolded, slightly longer and preferably slightly wider than the rubber blank from which the tube is to be made, and the central member is provided with a valve stem receiving aperture 1n.

The forming device above described may be conveniently supported upon a table indicated at 4 with one edge adjacent a guard or protector 5 which for convenience is made in the forni of an angle bar pivotally connected to the table by hinges 5a so that ythe laterally turned edge may be swung back away from the adjacent edge of board or member 3 as shown in Figs. l and 3 or into overlapping relation thereto as shown in Fig. 2.

In using the described apparatus a sheet A of uncured calendered rubber of tube forming size is laid upon the opened out supporting member in the position shown in Fig. 2 with its right hand edge alined with the right hand edge of board 3 and the angle member or vguard 5 is then swung over so that its flange 5b overlaps and rests upon the rubber sheet,

Serial No. 305,559.

serving to protect the margin from the nonadhesive coating hereinafter described and also to clamp the strip in place. The operator then takes a valve pad 7 with its attached stem 8 and pushes the valve stem through the rubben sheet and into the opening in board or member l (as shown in Fig. 2), and presses the pad down until it adhesively contacts with and joins the surface of the sheet A. Then by suitable means, such as a brush B, the operator applies a liquid, to the upper surface of the sheet, of such nature that it will prevent adhesion. Obviously, instead of liquid, powder might be sprinkled on by any suitable means, such as a dust bag, such liquids and powders being well known to those skilled in the art.

The overlapping fiange 5b of the angle iron or member 5 serves, however, as a protector and prevents any liquid or dust from coming in contact with the underlying surface of the rubber sheet and therefore preserves its tacky condition.

Having thus prepared the surface'of 'the sheet or blank, the operator, as the next step of the process, grasps the board or member 2 and swings it from the position shown in Fig. l to that illustrated in Fig. 3, whereby the margin or portion of the sheet overlying board 2 is folded over upon the left hand portion of the sheet supported by the intermediate board 1. Board or member 2 is then swung back into the position shown in Fig. 4, the guard member 5 is swung back free from the edge of the sheet (Fig. 3), and the right hand board or member 3 is swung over into the position shown in Fig. 4, causing the sheet portion carried thereby to be folded over the right hand portion of the sheet on board l and the tacky margin to be superimposed on the margin of the previously folded over portion of said sheet, the tacky condition of the protected margin causing it to adhere to the margin of the other portion, which, due to its inverted position, is likewise tacky. This adhesion may be increased or made more effective by the operator pressing the margins together conveniently by means of a hand roller.

The folded slab is now in the form of ai tube of the proper size and length and the operator may now proceed to splice the ends of the tube together in any desired' manner to form an endless unvulcanized tube suitable for use in tire casings. i

A moderate amount of air may be introduced into the tube through the valve stem to facilitate handling after which, the tube may be placed in a. mold and vulcanized under requisite internal pressure in the customary manner.

Having thus described my invention, What I claim is:

l. Apparatus for forming tubes of plastic` tothe free margin of one of theside sections.

2. Apparatus according to claim l in which the protector is in the shape of an angle bar mounted on swinging arms fulcrumecl on iixed pivots and has one flange adapted to overlie the free edge of one of the sections and contact with the sheetsupported thereby.

3. Apparatus according to claim 1 in which the intermediate member has a hole `for the insertion of the stem of a Valve pad.

In testimony whereof I affix my signal me lHlLLll VILLI S A N DE R S( )N

US305559A 1928-09-12 1928-09-12 Apparatus for making tire tubes Expired - Lifetime US1721975A (en)

Priority Applications (1)

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US305559A US1721975A (en) 1928-09-12 1928-09-12 Apparatus for making tire tubes

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Application Number Priority Date Filing Date Title
US305559A US1721975A (en) 1928-09-12 1928-09-12 Apparatus for making tire tubes

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732882A (en) * 1952-09-30 1956-01-31 -method of building continuous tubing and apparatus therefor
US20060243375A1 (en) * 2002-09-30 2006-11-02 Pieda Ruel B Forming folded-stack packaged device using progressive folding tool

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2732882A (en) * 1952-09-30 1956-01-31 -method of building continuous tubing and apparatus therefor
US20060243375A1 (en) * 2002-09-30 2006-11-02 Pieda Ruel B Forming folded-stack packaged device using progressive folding tool
US20060243374A1 (en) * 2002-09-30 2006-11-02 Pieda Ruel B Forming folded-stack packaged device using progressive folding tool
US20060243376A1 (en) * 2002-09-30 2006-11-02 Pieda Ruel B Forming folded-stack packaged device using progressive folding tool
US20060243392A1 (en) * 2002-09-30 2006-11-02 Pieda Ruel B Forming folded-stack packaged device using progressive folding tool
US7718025B2 (en) 2002-09-30 2010-05-18 Intel Corporation Method of forming folded-stack packaged device using progressive folding tool

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