US1598383A - Method of making inner tubes - Google Patents

Method of making inner tubes Download PDF

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Publication number
US1598383A
US1598383A US756621A US75662124A US1598383A US 1598383 A US1598383 A US 1598383A US 756621 A US756621 A US 756621A US 75662124 A US75662124 A US 75662124A US 1598383 A US1598383 A US 1598383A
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US
United States
Prior art keywords
tube
inner tubes
mandrel
making inner
raw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US756621A
Inventor
Ernest W Melvin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fisk Rubber Co
Original Assignee
Fisk Rubber Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fisk Rubber Co filed Critical Fisk Rubber Co
Priority to US756621A priority Critical patent/US1598383A/en
Application granted granted Critical
Publication of US1598383A publication Critical patent/US1598383A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/24—Endless tubes, e.g. inner tubes for pneumatic tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING 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
    • B29K2021/00—Use of unspecified rubbers as moulding material

Definitions

  • My invention relates to the manufacture of inner tubes for pneumatic tires and more particularly to the treatment of such tubes during vulcanization.
  • the raw tube is formed by forcing warm plastic rubber through a circular die of a tubing machine.
  • the tubed stock is then cut into lengths as desired,. positioned on a cylindrical mandrel, and wrapped with strips of fabric.
  • the purpose of the wrapping is to hold the raw stock in close contact with the mandrel and prevent the entrance of steam between the tube and mandrel during vulcanization.
  • the method of making inner tubes for pneumatic tires which comprises forming the raw tube with a length in excess of normal requirements, positioning theraw tube on a mandrel, the ends of the raw tubebeing turned baclqand subjecting the tube to vulcanization.
  • the method of making inner tubes for pneumatic tires which comprises tubing the stock 'to a length in excess of normal require FALLS, MASSACHUSETTS, A CORPORATION OF MASSACHU- ments, positioning the raw tube on a mandrel, turning back the ends of the tube, and subjecting thetube to vulcanization.
  • the method of making inner tubes for pneumatic tires which comprises tubing the stock to a length in excess of normal requirements, positioning the raw tube on a cylindrical mandrel, turning back the ends of the tube for a distance of substantially an inch, and subjecting the tube to vulcanization.

Description

Patented Aug. 3I, 1926., i
UNITED STATES PATENT- OFFICE.
ERNEST W. MELVIN, OF MILWAUKEE, WISCONSIN,
COMPANY, OF CHIGOPEE ASSIGNOB TO THE FISK RUBBER SETTS- METHOD OF MAKING INNER TUBES. Ho Drawing. Application filed December 17, 1924. Serial No. 756521.
My invention relates to the manufacture of inner tubes for pneumatic tires and more particularly to the treatment of such tubes during vulcanization.
. According to one conventional method the raw tube is formed by forcing warm plastic rubber through a circular die of a tubing machine. The tubed stock is then cut into lengths as desired,. positioned on a cylindrical mandrel, and wrapped with strips of fabric. The purpose of the wrapping is to hold the raw stock in close contact with the mandrel and prevent the entrance of steam between the tube and mandrel during vulcanization.
It is among the objects of my invention with the necessity of wrapping ing operation. b
In carrying out my improved method I tube. the stock and position the raw tube on the mandrel in any conventional or desired manner" except that theraw tube is slightly longer. I then turn the ends of the tube back for about an inch'. The turned back portions of the tube exert sufficient tension to .efiectively seal the ends of the raw tube against the mandrel, preventing the entrance of steam between the tube and mandrel without the necessity of any wrapping. The vulcanization may be carried out in any conventional manner.
1. The method of making inner tubes for pneumatic tires which comprises forming the raw tube with a length in excess of normal requirements, positioning theraw tube on a mandrel, the ends of the raw tubebeing turned baclqand subjecting the tube to vulcanization.
'2. The method of making inner tubes for pneumatic tires which comprises tubing the stock 'to a length in excess of normal require FALLS, MASSACHUSETTS, A CORPORATION OF MASSACHU- ments, positioning the raw tube on a mandrel, turning back the ends of the tube, and subjecting thetube to vulcanization.
3. The method of making inner tubes for pneumatic tires which comprises tubing the stock to a length in excess of normal requirements, positioning the raw tube on a cylindrical mandrel, turning back the ends of the tube for a distance of substantially an inch, and subjecting the tube to vulcanization.
In testimony whereof I have signed my name to the above specification.
ERNEST W. MELVIN.
US756621A 1924-12-17 1924-12-17 Method of making inner tubes Expired - Lifetime US1598383A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US756621A US1598383A (en) 1924-12-17 1924-12-17 Method of making inner tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US756621A US1598383A (en) 1924-12-17 1924-12-17 Method of making inner tubes

Publications (1)

Publication Number Publication Date
US1598383A true US1598383A (en) 1926-08-31

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Family Applications (1)

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US756621A Expired - Lifetime US1598383A (en) 1924-12-17 1924-12-17 Method of making inner tubes

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465154A (en) * 1945-11-07 1949-03-22 Int Harvester Co Speed governor for centrifuges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465154A (en) * 1945-11-07 1949-03-22 Int Harvester Co Speed governor for centrifuges

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