US3928674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for producing articles of reinforced plastics or like construction
Assignee: Individual
•
Filing: 1973-06-12
•
Granted: 1975-12-23
•
Expires: 1993-06-12
Abstract
Abstract Method and apparatus for forming articles by making a base of stretchable fabric, holding the base in stretched condition at opposed ends, rotating the base and coating the base with a curable plastics material.
Inventors
- 👤 Ernst Theodoor Voermans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:43
CPC Classifications
B; B05; B05B; B05B13/00; B05B13/02; B05B13/04; B05B13/0405; B05B13/041; B05B13/06; B05B13/0645; B05B13/0654; B29; B29D; B29D22/00; B29K; B29K2105/00; B29K2105/06
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
105 words
A METHOD OF PRODUCING REINFORCED TUBULAR AND NON-TUBULAR ARTICLES, OF A WIDE VARIETY OF DIFFERENT SHAPES IN A DISCONTI UOUS MANNER, COMPRISING THE STEPS OF PROVIDING A BASE OF FLEXIBLE MATERIAL; HOLDING THE OPPOSITE ENDS OF THE BASE AT TWO LONGITUDINALLY SPACED RESPECTIVE LOCATIONS AND TENDING THE BASE BETWEEN THE LOCATIONS, WITH THE HOLDING LOCATIONS CONSTITUTING THE SOLE SUPPORT FOR THE BASE, WHEREBY THE BASE IS SELFSUPPORTING BETWEEN THE LOCATIONS, COATING THE BASE BY SPRAYING AN INITIALLY FLUID, HARDENABLE MATERIAL ONTO THE BASE, WHEREBY THE HARDENABLE MATERIAL ADHERES TO AND COATS THE BASE, AND ROTATING THE BASE ABOUT AN AXIS DURING THE SPRAY COATING THEREOF.
Claim 2
Independent Claim
105 words
A METHOD OF PRODUCING REINFORCED TUBULAR AND NON-TUBULAR ARTICLES, OF A WIDE VARIETY OF DIFFERENT SHAPES IN A DISCONTI UOUS MANNER, COMPRISING THE STEPS OF PROVIDING A BASE OF FLEXIBLE MATERIAL; HOLDING THE OPPOSITE ENDS OF THE BASE AT TWO LONGITUDINALLY SPACED RESPECTIVE LOCATIONS AND TENDING THE BASE BETWEEN THE LOCATIONS, WITH THE HOLDING LOCATIONS CONSTITUTING THE SOLE SUPPORT FOR THE BASE, WHEREBY THE BASE IS SELFSUPPORTING BETWEEN THE LOCATIONS, COATING THE BASE BY SPRAYING AN INITIALLY FLUID, HARDENABLE MATERIAL ONTO THE BASE, WHEREBY THE HARDENABLE MATERIAL ADHERES TO AND COATS THE BASE, AND ROTATING THE BASE ABOUT AN AXIS DURING THE SPRAY COATING THEREOF.
Claim 3
Dependent Claim
18 words
A method as claimed in claim 1 wherein said rotation is in a single direction about said axis.
Claim 4
Dependent Claim
21 words
A method as claimed in claim 1 wherein said rotation comprises alternate periods of rotation in opposite directions about said axis.
Claim 5
Dependent Claim
12 words
A method as claimed in claim 1 wherein said rotation is intermittent.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 1 wherein the base is elastic and is maintained in stretched condition during said coating.
Claim 7
Dependent Claim
18 words
A method as claimed in claim 5 wherein the base is a substantially closed hollow body of fabric.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 6 wherein the base is coated on inner and outer sides.
Claim 9
Dependent Claim
16 words
A method as claimed in claim 6 wherein the base is coated on the outside only.
Claim 10
Dependent Claim
25 words
A method as claimed in claim 5 wherein said application is effected by spraying said hardenable material onto the base and subsequently setting the material.
Claim 11
Dependent Claim
23 words
A method as claimed in claim 9 wherein said spraying is effected with a spray head which follows the contours of the base.
Claim 12
Dependent Claim
24 words
A method as claimed in claim 10 wherein said spraying is effected electrostatically by means of an electrode in the interior of the base.
Claim 13
Dependent Claim
23 words
A method as claimed in claim 5 wherein a reduced air pressure is applied to the interior of the base during said application.
Claim 14
Dependent Claim
26 words
A method as claimed in claim 9 wherein the hardenable material is a curable material and curing is effected while the base is maintained under tension.
Claim 15
Dependent Claim
18 words
A method as claimed in claim 13 wherein said hardenable curing is effected while the base is moved.
Claim 16
Dependent Claim
24 words
A method as claimed in claim 14 wherein said material is a heat curable plastics material and curing is effected by application of heat.
Claim 17
Dependent Claim
18 words
A method as claimed in claim 5 wherein filling material is applied to the base during said application.
Claim 18
Dependent Claim
23 words
A method as claimed in claim 5, wherein an increased air pressure is applied to the interior of the base during said application.
Claim 19
Dependent Claim
16 words
A method as claimed in claim 16, wherein said filling material is a fibrous filling material.
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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) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |