US1284298A - Process of making composite tubes. - Google Patents

Process of making composite tubes. Download PDF

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Publication number
US1284298A
US1284298A US87798014A US1914877980A US1284298A US 1284298 A US1284298 A US 1284298A US 87798014 A US87798014 A US 87798014A US 1914877980 A US1914877980 A US 1914877980A US 1284298 A US1284298 A US 1284298A
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US
United States
Prior art keywords
mandrel
composite tubes
tubes
making composite
heat
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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
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US87798014A
Inventor
Louis T Frederick
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CBS Corp
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Westinghouse Electric and Manufacturing Co
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Publication date
Application filed by Westinghouse Electric and Manufacturing Co filed Critical Westinghouse Electric and Manufacturing Co
Priority to US87798014A priority Critical patent/US1284298A/en
Application granted granted Critical
Publication of US1284298A publication Critical patent/US1284298A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C1/00—Making tubes or pipes by feeding at right angles to the winding mandrel centre line
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels

Definitions

  • My invention relates to the manufacture of composite tubes composed of absorbent sheet material treated with an adhesive substance, and it has for its object to'provide a simple and effective process for producing composite tubes of theabove-indicated character without the use of elaborate apparatusor the exercise of a high degree of skill.
  • tubes composed 0% paper or other fibrous material coated orimpregnated with an adhesive, which may be'a varnish gum such as shellac or a synthetic resin such as the well-known phenolic condensation products.
  • an adhesive which may be'a varnish gum such as shellac or a synthetic resin such as the well-known phenolic condensation products.
  • the process heretofore commercially employed for producing such tubes consists in treating paper with the adhesive material and winding the treated paper upon a mandrel with the simultaneous application of heat, tension and pressure, the heat being applied for the purpose of softening the adhesive and the tension and pressure being necessary in order to unite the successive layers into a compact mass. This procedure makes necessary the use of rather complicated apparatus which requires the attention of highly. skilled operatives.
  • 1 proceed by wrapping upon a mandrel one or two-turns of untreated paper, and I then apply to the mandrel a suflicient number of turns of coated fibrous absorbent material to p" re a tube wall of the required thickness.
  • a process of making tubes that comprises treating fibrous material with an adhesive material comprising a phenolic con-- densation product, winding the treated fibrous material upon a mandrel without heat or pressure, subjecting the wound material to heat and lo molding pressure against its entire outer surface while upon the said mandrel, and withdrawing the said mandrel.

Description

UNITED STATES PATENT OFFICE.
LOUIS. r. FREDERICK, or WILKINsBImG, PENNSYLVANIA, ASSIGNOB. 'ro WESTING- nousn ELECTRIC AND MANUFACTURING comPANY,'A conron rroN or PnNNsYL- Specification of Letters Patent. 4 Patented NOV. 12, 1918.
VANIA.
PROCESS OF MAKING COMPOSITE TUBES.
No Drawing.
To all whom it may concern:
a citizen of the United States, and a resident of Wilkinsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Processes of Making Composite Tubes, of which the following is a specification.
My invention relates to the manufacture of composite tubes composed of absorbent sheet material treated with an adhesive substance, and it has for its object to'provide a simple and effective process for producing composite tubes of theabove-indicated character without the use of elaborate apparatusor the exercise of a high degree of skill.
In the electrical insulatin art, much use is made of tubes composed 0% paper or other fibrous material coated orimpregnated with an adhesive, which may be'a varnish gum such as shellac or a synthetic resin such as the well-known phenolic condensation products. The process heretofore commercially employed for producing such tubes consists in treating paper with the adhesive material and winding the treated paper upon a mandrel with the simultaneous application of heat, tension and pressure, the heat being applied for the purpose of softening the adhesive and the tension and pressure being necessary in order to unite the successive layers into a compact mass. This procedure makes necessary the use of rather complicated apparatus which requires the attention of highly. skilled operatives.
According to my present process, 1 proceed by wrapping upon a mandrel one or two-turns of untreated paper, and I then apply to the mandrel a suflicient number of turns of coated fibrous absorbent material to p" re a tube wall of the required thickness.-
This fibrous material, which is ordinarily pa; er, 1s provlded, before being wound on the mandrel, with a dried coating of a phenolic be taken from the. inold without damaging the tube. Ifthc adhesive material contains Application filed December 18, 1914. Serial No. 871,980.
the heat has been applied for a sufiicient period to harden the adhesive material. When the tube and mandrel have cooled sufficiently for handlin the mandrel may be withdrawn and any ns caused by the mold then removed. Y
The process described above produces tubes much more quickly than is possible by the methods heretofore employed, because the hot-wrapping process is necessarily carried out at a slow rate. Furthermore, ashas r a phenolic condensation product, the tem- Be it known that I, LOUIS T. FREDERICK,
already been pointed out, my process .re-
quires less complicated apparatus and less sation product, it is to be understood that any equivalent materials may be substituted for them, as convenience or necessity may require. It is also to be understood that the steps of my process may be variously modified by persons skilled in the art, and that my invention is therefore limited only by the. scope of theappended claims.
I claim as my invention:
1. A process of making tubes that comprises treating fibrous material with an adhesive material comprising a phenolic con-- densation product, winding the treated fibrous material upon a mandrel without heat or pressure, subjecting the wound material to heat and lo molding pressure against its entire outer surface while upon the said mandrel, and withdrawing the said mandrel.
2. The process of making tubes that comprises impregnating a sheet of fibrous material wilh a phenolic condensation product as a binder, winding a dry sheet so treatedabont a mandrel without applying heat and pressure to build up a tubular body upon the A mamlrel. and first softening and then hardening the binder by applying heat and pressure against the entire outer surface ofthe tubular body so formed.
In testimony whereof I have hereunto subseribed my name this 11th day of Dec., 1914.
Louis '1. FREDERICK.
Witnesses:
Gonom-E. McGEu, B. B. Hmns.
70 skill .on the part of the operatives than the a
US87798014A 1914-12-18 1914-12-18 Process of making composite tubes. Expired - Lifetime US1284298A (en)

Priority Applications (1)

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US87798014A US1284298A (en) 1914-12-18 1914-12-18 Process of making composite tubes.

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US87798014A US1284298A (en) 1914-12-18 1914-12-18 Process of making composite tubes.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2577715A (en) * 1949-01-05 1951-12-04 Sandoz Ag Electrical insulating material
US2653887A (en) * 1947-08-01 1953-09-29 Owens Corning Fiberglass Corp Method of producing tubing
US2760896A (en) * 1952-05-19 1956-08-28 American Fixture Inc Method of making high-pressure non-metallic tubing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2653887A (en) * 1947-08-01 1953-09-29 Owens Corning Fiberglass Corp Method of producing tubing
US2577715A (en) * 1949-01-05 1951-12-04 Sandoz Ag Electrical insulating material
US2760896A (en) * 1952-05-19 1956-08-28 American Fixture Inc Method of making high-pressure non-metallic tubing

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