US1387065A - Method of making reinforced molded conduits - Google Patents

Method of making reinforced molded conduits Download PDF

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Publication number
US1387065A
US1387065A US435406A US43540621A US1387065A US 1387065 A US1387065 A US 1387065A US 435406 A US435406 A US 435406A US 43540621 A US43540621 A US 43540621A US 1387065 A US1387065 A US 1387065A
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Prior art keywords
reinforced molded
core
spiral
making
conduit
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US435406A
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Thomas E Murray
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B21/00—Methods or machines specially adapted for the production of tubular articles
    • B28B21/56—Methods or machines specially adapted for the production of tubular articles incorporating reinforcements or inserts

Definitions

  • Conduits of cement or like plastic material have been molded upon a spiral core of wire or the like provided with a cover or wrap.
  • y present invention is a method of making a reinforced conduit of this type.
  • FIG. 1 represents in longitudinal section a portion of theconduit and core therein.
  • Fig. 2 is a transverse section on the line 2, 2 of Fig. 1.
  • Fig. '3 is a similar transverse section, with the spiral core removed.
  • I In performing'my method, I first make a spiral core 1 of wire or strip metal. Upon said core I apply preferably by wrapping, a cover -2 of paper or similar flexible sheet material. To this cover I next apply a coating 3 of pitch or other viscid adhesive material which will harden. While the pitch coating I is still viscid, I wind thereon a sp-lralwlre or metal strip 4, and upon the 'SBJd coated and woundoore I apply plastic cement or concrete 5 to form the conduit body, which I allow to become hard. Finally, I withdraw V 1 the core 1.
  • the spiral wire 4 becomes embedded in the wall of same.
  • the cover 2 remains firmly attached to the spiral 4 and cement 5 by the pitch 3, and so forms a smooth inner surface for the conduit bore.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

' T. E. MURRAY.
METHOD OF MAKING REINFORCED MOLDED CONDUITS.
APPLICATION FILED IAN. 6, 1921.
1,387,065. Patented Aug. 9, 1921'.
rrEo STATES THOMAS E. MURRAY, F BROOKLYN,-NEW YORK.
METHQD ,OF MAKING- REDIFORGED .MOLDED CONDUI'IS.
To all whom it may concern:
Be-it known that I, THOMAS E. MURRAY, a
citizen of the United States; residing at Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful Improvement in Methods of Making Reinforced Molded Conduits, of which the following is a specification.
Conduits of cement or like plastic material have been molded upon a spiral core of wire or the like provided with a cover or wrap.-
ing of paper or similar flexible material.
y present invention is a method of making a reinforced conduit of this type.
In' the accompanying drawing- Figure 1 represents in longitudinal section a portion of theconduit and core therein. Fig. 2 is a transverse section on the line 2, 2 of Fig. 1. Fig. '3 is a similar transverse section, with the spiral core removed.
Similar numbers of reference indicate like parts.
In performing'my method, I first make a spiral core 1 of wire or strip metal. Upon said core I apply preferably by wrapping, a cover -2 of paper or similar flexible sheet material. To this cover I next apply a coating 3 of pitch or other viscid adhesive material which will harden. While the pitch coating I is still viscid, I wind thereon a sp-lralwlre or metal strip 4, and upon the 'SBJd coated and woundoore I apply plastic cement or concrete 5 to form the conduit body, which I allow to become hard. Finally, I withdraw V 1 the core 1.
Specification of Letters Patent. Application flied .Tanuary 6, 1921.
- said lining with Patented Aug. 2, 1921. Serial No. 435,406.
The spiral wire 4 becomes embedded in the wall of same. The cover 2 remains firmly attached to the spiral 4 and cement 5 by the pitch 3, and so forms a smooth inner surface for the conduit bore.
I claim:
1. The method of making a reinforced molded conduit, which consists in, first, ap-
plying to a tubular lining constructed to fit within said conduit, a coating ofadhesive material; second, inclosing said ing in a spiral of metal; third, coating plasticmatenal to form the conduit body. i
2. The method of making a reinforced molded conduit, which consists in, first, producing a spiral metal core second, covering said core with flexible material; third, applying to said cover a coating of adhesive 'material; fourth, inclosing said coated core in a spiral strip of metal; upon said coated and covered core a conduit body of plastic material and allowing same to harden, and sixth, withdrawing said spiral core. 1
In testimony whereof I have afiixedmy signature in presence of two witnesses.-
THOMAS E. MURRAY.
fifth, forming I Witnesses: GERTRUDE T. PORTER, MAY T. MCGABRY.
the conduit, and so reinforces the coated lin-
US435406A 1921-01-06 1921-01-06 Method of making reinforced molded conduits Expired - Lifetime US1387065A (en)

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US435406A US1387065A (en) 1921-01-06 1921-01-06 Method of making reinforced molded conduits

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217077A (en) * 1962-02-27 1965-11-09 Cocke Hill Method of producing lined concrete pipe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3217077A (en) * 1962-02-27 1965-11-09 Cocke Hill Method of producing lined concrete pipe

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