Patent US3874970A successfully refreshed from Google Patents.
US3874970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing flattened flexible tube stock
Assignee: Owens Corning
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Filing: 1972-02-03
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Granted: 1975-04-01
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Expires: 1992-02-03
Abstract
Abstract A method and apparatus for producing a tubular uncured shell of glass fiber reinforced resin by depositing the fibers and resins on a mandrel surface and removing the shell axially from the mandrel. The shell after moving off of the cylindrical mandrel is collapsed between rollers, and wound into a roll mounted transversely of the axis of the mandrel. In those instances where the surface of the mandrel revolves, the roll of flattened tubular materials is revolved with the mandrel at substantially the same speed. Periodically the tubular flattened material is cut, the roll removed, and a new roll started.
Inventors
- 👤 John William Dunn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:01
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; B29C53/74; B65; B65H; B65H81/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
158 words
A METHOD OF PRODUCING SHEET MOLDING COMPOUND FOR USE IN MAKING GLASS FIBER REINFORCE MOLDED ARTICLES, COMPRISING: DEPOSITING A BINDER FORMING MATERIAL AND GLASS FIBER REINFORCE MENT ONTO A GENERALLY CYLINDRICAL SURFACE HAVING A LONGITUDINALLY EXTENDING AXIS OF REVOLUTION WHILE THE SURFACE IS BOTH REVOLVED ABOUT ITS LONGITUDINAL AXIS AND IS MOVED LONGITUDINALLY OF SAID AXIS TO FORM A REVOLVING FLEXIBLE ENVELOPE, MOVING THE REVOLVING FLEXIBLE ENVELOPE AXIALLY OFF OF SAID GENERALLY CYLINDRICAL SURFACE WHILE IT IS REVOLVING, PASSING THE FLEXIBLE ENVELOPE BETWEEN OPPOSING ROLLERS EXTENDING TRANSVERSELY OF SAID LONGITUDINAL AXIS TO COLLAPSE SAID ENVELOPE WHILE SAID ENVELOPE IS REVOLVING, SUPPORTING MEANS FOR ROLLING THE COLLAPSED ENVELOPE INTO A ROLL TRANSVERSELY TO THE LONGITUDINAL AXIS OF SAID GENERALLY CYCLINDRIC SURFACE, AND REVOLVING SAID ROLLERS AND LAST MENTIONED MEANS END FOR END TRANSVERSELY OF SAID LONGITUDINAL AXIS GENERALLY IN SYNCHRONSIM WITH SAID GENERALLY CYLINDRICAL SURFACE WHILE ACTUATING SAID LAST MENTIONED MEANS TO PRODUCE A ROLL OF SAID COLLAPSED ENVELOPE.
Claim 2
Independent Claim
158 words
A METHOD OF PRODUCING SHEET MOLDING COMPOUND FOR USE IN MAKING GLASS FIBER REINFORCE MOLDED ARTICLES, COMPRISING: DEPOSITING A BINDER FORMING MATERIAL AND GLASS FIBER REINFORCE MENT ONTO A GENERALLY CYLINDRICAL SURFACE HAVING A LONGITUDINALLY EXTENDING AXIS OF REVOLUTION WHILE THE SURFACE IS BOTH REVOLVED ABOUT ITS LONGITUDINAL AXIS AND IS MOVED LONGITUDINALLY OF SAID AXIS TO FORM A REVOLVING FLEXIBLE ENVELOPE, MOVING THE REVOLVING FLEXIBLE ENVELOPE AXIALLY OFF OF SAID GENERALLY CYLINDRICAL SURFACE WHILE IT IS REVOLVING, PASSING THE FLEXIBLE ENVELOPE BETWEEN OPPOSING ROLLERS EXTENDING TRANSVERSELY OF SAID LONGITUDINAL AXIS TO COLLAPSE SAID ENVELOPE WHILE SAID ENVELOPE IS REVOLVING, SUPPORTING MEANS FOR ROLLING THE COLLAPSED ENVELOPE INTO A ROLL TRANSVERSELY TO THE LONGITUDINAL AXIS OF SAID GENERALLY CYCLINDRIC SURFACE, AND REVOLVING SAID ROLLERS AND LAST MENTIONED MEANS END FOR END TRANSVERSELY OF SAID LONGITUDINAL AXIS GENERALLY IN SYNCHRONSIM WITH SAID GENERALLY CYLINDRICAL SURFACE WHILE ACTUATING SAID LAST MENTIONED MEANS TO PRODUCE A ROLL OF SAID COLLAPSED ENVELOPE.
Claim 3
Dependent Claim
53 words
The method of claim 1 including the steps of: sensing the position of said envelope between said generally cylindrical surface and the point where it is collapsed by said opposing rollers, and controlling the rate of actuation of said last mentioned means in accordance with the position of said envelope that is sensed.
Claim 4
Dependent Claim
52 words
The method of claim 1 wherein said binder forming material contains an unsaturated polyester resin, an alkaline earth oxide containing material to link the resin molecules into a linear generally flexible solid state at a low temperature, and a free radical catalyst to cross link the resin molecules at a higher temperature.
Claim 5
Dependent Claim
29 words
The method of claim 3 wherein said glass fibers include fibers running longitudinally of the cylindrical surface and having a length which spans unsupported distances during the operations recited.
Claim 6
Dependent Claim
45 words
The method of claim 1 wherein said glass fibers include fibers running longitudinally of said generally cylindrical surface and have a length which spans the operations recited from the time of leaving the generally cylindrical surface until the envelope is supported by the opposing rollers.
Claim 7
Dependent Claim
23 words
The method of claim 5 wherein said fibers running longitudinally of the cylindrical surface are added to the cylindrical surface as a scrim.
Claim 8
Independent Claim
151 words
A method of producing glass fiber reinforced plastic objects having a polygonal cross section and comprising: depositing a binder forming material and glass fibers onto the surface of a mandrel while the surface both revolves about its longitudinal axis and moves longitudinally of said axis to form a revolving flexible envelope, removing the revolving flexible envelope axially off of the surface of the mandrel while it is revolving, passing the flexible envelope between opposing rollers extending transversely of said longitudinal axis to collapse said envelope while said envelope is revolving, supporting means for rolling the collapsed shell into a roll transversely to the longitudinal axis of said mandrel, cutting the roll free, moving the roll to a form having an exterior surface of polygonal cross section, expanding the collapsed envelope over said form, and causing said binder forming material of said envelope to harden and assume the configuration of said form.
Claim 9
Independent Claim
151 words
A method of producing glass fiber reinforced plastic objects having a polygonal cross section and comprising: depositing a binder forming material and glass fibers onto the surface of a mandrel while the surface both revolves about its longitudinal axis and moves longitudinally of said axis to form a revolving flexible envelope, removing the revolving flexible envelope axially off of the surface of the mandrel while it is revolving, passing the flexible envelope between opposing rollers extending transversely of said longitudinal axis to collapse said envelope while said envelope is revolving, supporting means for rolling the collapsed shell into a roll transversely to the longitudinal axis of said mandrel, cutting the roll free, moving the roll to a form having an exterior surface of polygonal cross section, expanding the collapsed envelope over said form, and causing said binder forming material of said envelope to harden and assume the configuration of said form.
Claim 10
Independent Claim
155 words
The apparatus for making a flattened tube of glass fibers embedded in hardenable matrix forming material, comprising: a generally cylindrical form having a longitudinal axis of rotation, means for rotating said form about its longitudinal axis of rotation, means for winding glass fiber reinforcements onto said form to form a collapsible shell while it revolves about its longitudinal axis, means for applying resin to said reinforcements, means for moving said shell axially off of said form, a pair of opposing rollers extending generally transversely of said longitudinal axis of rotation and spaced axially from said form for collapsing said shell when drawn therebetween, pacKage producing means for rolling the collapsed shell into a transportable roll of said collapsed shell, and means rotating said transversely extending opposing rollers and said package producing means at generally right angles to said longitudinal axis generally in synchronism with said form to produce said package while said form is rotating.
Claim 11
Independent Claim
155 words
The apparatus for making a flattened tube of glass fibers embedded in hardenable matrix forming material, comprising: a generally cylindrical form having a longitudinal axis of rotation, means for rotating said form about its longitudinal axis of rotation, means for winding glass fiber reinforcements onto said form to form a collapsible shell while it revolves about its longitudinal axis, means for applying resin to said reinforcements, means for moving said shell axially off of said form, a pair of opposing rollers extending generally transversely of said longitudinal axis of rotation and spaced axially from said form for collapsing said shell when drawn therebetween, pacKage producing means for rolling the collapsed shell into a transportable roll of said collapsed shell, and means rotating said transversely extending opposing rollers and said package producing means at generally right angles to said longitudinal axis generally in synchronism with said form to produce said package while said form is rotating.
Claim 12
Dependent Claim
18 words
The apparatus of claim 8 including: means for distributing generally continuous strands generally longitudinally of said cylindrical form.
Claim 13
Dependent Claim
61 words
The apparatus of claim 9 wherein said means for distributing generally continuous strands longitudinally of said form comprises: an annular frame surrounding said form, a plurality of packages of glass fiber strands on said frame with the strands in position for contacting binder deposited on said form, and means for rotating said frame at generally the same speed as said form.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |