US3923951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a molded fiber glass and resin structure with interlocked and bonded walls
Assignee: Individual
•
Filing: 1974-03-15
•
Granted: 1975-12-02
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Expires: 1994-03-15
Abstract
Abstract An improved process for molding a plastic structure, specifically a fiberglass article, wherein a preformed reinforcing member is integrated into the molded structure by means of a chemical bond and by means of a double mechanical interlock so that the reinforcing member is fixedly and rigidly integrated with the molded product. This process also results in an improved molded plastic structure incorporating therein a preformed reinforcing member.
Inventors
- 👤 Jr Peter Pukszta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:29
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/28; Y; Y10; Y10S; Y10S264/00; Y10S264/59
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A METHOD OF MOLDING A FIBERGLASS REINFORCED STRUCTURE HAVING PLURAL SIDEWALLS INTERCONNECTED BY AT LEAST TWO SPACED APART LAYERS, COMPRISING: DEPOSITING A LAYER OF CURABLE FIBERGLASS RESIN MIXTURE OVER INSIDE SURFACE OF A MOLD CAVITY AND PARTIALLY CURING THE RESIN OF SAID MIXTURE TO FORM A FIRST PREFORM, PROVIDING A PREFORMED REINFORING MEMBER HAVING A BASE WITH INTERGRAL SIDEWALLS CONNECTED TO SAID BASE ABND FORMING AN ANGLED EDGE THEREWITH, SAID SIDEWALLS EACH HAVING A FURTHER EDGE REMOTE FROM SAID ANGLED EDGE AND ALSO HAVING AN EXTERNAL RECESS ADJACENT SAID ANGLED EDGE, POSITIONING A RESIN SOAKED FIBERGLASS MAT ADJACENT THE SIDEWALLS OF SAID FIRST PREFORM;
Claim 2
Independent Claim
104 words
A METHOD OF MOLDING A FIBERGLASS REINFORCED STRUCTURE HAVING PLURAL SIDEWALLS INTERCONNECTED BY AT LEAST TWO SPACED APART LAYERS, COMPRISING: DEPOSITING A LAYER OF CURABLE FIBERGLASS RESIN MIXTURE OVER INSIDE SURFACE OF A MOLD CAVITY AND PARTIALLY CURING THE RESIN OF SAID MIXTURE TO FORM A FIRST PREFORM, PROVIDING A PREFORMED REINFORING MEMBER HAVING A BASE WITH INTERGRAL SIDEWALLS CONNECTED TO SAID BASE ABND FORMING AN ANGLED EDGE THEREWITH, SAID SIDEWALLS EACH HAVING A FURTHER EDGE REMOTE FROM SAID ANGLED EDGE AND ALSO HAVING AN EXTERNAL RECESS ADJACENT SAID ANGLED EDGE, POSITIONING A RESIN SOAKED FIBERGLASS MAT ADJACENT THE SIDEWALLS OF SAID FIRST PREFORM;
Claim 3
Dependent Claim
60 words
A method according to claim 1, wherein said resin soaked fiberglass comprises a second fiberglass mat which in inserted into said recess formed in the preformed reinforcing member after the first mentioned mat has been positioned on the first preform and after the reinforcing member has been inserted into said mold cavity so as to engage said first mentioned mat.
Claim 4
Dependent Claim
27 words
A method according to claim 1, wherein said mat is positioned to overlie said layer prior to positioning of said preformed reinforcing member within said mold cavity.
Claim 5
Dependent Claim
63 words
A method according to claim 1, wherein one of the surfaces of said mold cavity on which said layer is deposited extends at a slight angle relative to the opposed external surface formed on the sidewall of said preformed reinforcing member, whereby relative movement of said preformed member into said mold cavity causes said mat to be pushed into contact with said layer.
Claim 6
Dependent Claim
94 words
A method according to claim 1, including the steps of positioning a guide member within said mold cavity in spaced relationship from said layer, said guide member being positioned directly on a part of said layer, said edge portion of said mat being disposed to partially engage said guide member, and relatively moving said preform into said mold cavity so that said further edge of said sidewall engages said one edge portion of said mat and forms same into a substantially U-shaped portion disposed in overlapping engagement with said further edge of said sidewall.
Claim 7
Dependent Claim
32 words
A method according to claim 1, including the step of initially forming said preformed reinforcing member from a glass fiber-resin mixture which is compatible with the mixture used for forming said layer.
Claim 8
Dependent Claim
28 words
A method according to claim 1, including the steps of folding over the other edge portion of said mat and inserting same into said recess for filling same.
Claim 9
Dependent Claim
23 words
A method according to claim 1, wherein said layer is permitted to at least semi-cure prior to said wetted mat being positioned thereover.
References Cited (Backward Citations)
US3182110A
Cited
US3542913A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |