Patent US4165358A successfully refreshed from Google Patents.
US4165358A
Expired / Lapsed
US
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Process for clamping, sealing, and aiding the filling of matched molds
Assignee: Individual
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Filing: 1978-04-12
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Granted: 1979-08-21
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Expires: 1998-04-12
Abstract
Abstract A technique and process for clamping, sealing and aiding in the filling of fiberglass or other types of matched low pressure molds. An air-impervious bag is placed about the male and female molds and is sealed. A vacuum is then produced within the bag in such a manner as to fix the molds firmly together while sealing the mold parting line and whereupon a predetermined amount of molding material is injected within the mold cavity.
Inventors
- 👤 Jay Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:51
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/20; B29C33/202; B29C45/00; B29C45/17; B29C45/26; B29C45/34; Y; Y10; Y10S; Y10S264/00; Y10S264/78
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A method of clamping, sealing, and aiding the filling of low pressure matched molds, said method comprising the steps of: placing an air-impervious bag about the matched mold parts; sealing said bag about said molds; producing a vacuum within said bag in a manner such as to fix said molds firmly together; and injecting a predetermined amount of molding material within said molds.
Claim 2
Independent Claim
63 words
A method of clamping, sealing, and aiding the filling of low pressure matched molds, said method comprising the steps of: placing an air-impervious bag about the matched mold parts; sealing said bag about said molds; producing a vacuum within said bag in a manner such as to fix said molds firmly together; and injecting a predetermined amount of molding material within said molds.
Claim 3
Dependent Claim
24 words
The method of claim 1 further comprising the step of producing a vacuum within said mold cavity prior to injecting said molding material therein.
Claim 4
Dependent Claim
35 words
The method of claim 1 wherein said step of producing a vacuum within said bag placed about the matched mold parts includes producing, by means of said bag, a seal at the mold parting surfaces.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein said step of producing a vacuum within said bag placed about the matched mold parts includes providing, by means of said bag, a chamber to retain material overflow.
Claim 6
Independent Claim
33 words
The method of claims 1 or 4 wherein said step of producing a vacuum within said bag placed about the matched mold parts includes retaining unwanted fumes from escaping into the work area.
Claim 7
Dependent Claim
44 words
The method of claim 1 further comprising the steps of: curing said molding material within said molds; returning said bag to normal atmospheric pressure; and removing said bag from about said molds and separating said parts to remove the hardened molding material from therein.
References Cited (Backward Citations)
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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) | 1982-08-20 | 1983-02-19 | 1983-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-20 | 1987-02-19 | 1987-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-20 | 1991-02-19 | 1991-08-21 | $7700.00 | Window Closed / Lapsed |