US3659999A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for molding container parts
Assignee: Plastic Forming Co Inc
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Filing: 1970-02-09
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Granted: 1972-05-02
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Expires: 1990-02-09
Abstract
Abstract A plastic container having blow-molded cover and body parts and compression molded interfitting hinge parts formed integral therewith providing hinge pin bearing sections of double-wall thickness. A latch also is provided.
Inventors
- 👤 Peter T Schurman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:35
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/0031; B65; B65D; B65D43/00; B65D43/14; B65D43/16; B65D43/163; B65D43/164; B65D43/165; B65D2251/00; B65D2251/10; B65D2251/1016
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
115 words
In blow-molding apparatus for forming a thermoplastic container part having a reinforced hinge pin bearing portion, means for forming a tubular parison of thermoplastic material, mold sections adapted to be moved into engagement about such parison, said mold sections when engaged forming a cavity having the shape of said part, said mold sections also having adjacent one edge of said cavity mating parts spaced apart substantially only twice the wall thickness of said parison when said mold sections are engaged, said parts folding a portion of said parison upon itself to form a hinge pin bearing portion of substantially double thickness upon engaging said mold sections, and means for expanding said parison within said cavity.
Claim 2
Dependent Claim
115 words
In blow-molding apparatus for forming a thermoplastic container part having a reinforced hinge pin bearing portion, means for forming a tubular parison of thermoplastic material, mold sections adapted to be moved into engagement about such parison, said mold sections when engaged forming a cavity having the shape of said part, said mold sections also having adjacent one edge of said cavity mating parts spaced apart substantially only twice the wall thickness of said parison when said mold sections are engaged, said parts folding a portion of said parison upon itself to form a hinge pin bearing portion of substantially double thickness upon engaging said mold sections, and means for expanding said parison within said cavity.
Claim 3
Dependent Claim
37 words
ApParatus as set forth in claim 1, wherein said mold sections comprise a plate section and a cavity section, said mating parts comprising a finger projecting from said cavity section into a recess in said plate section.
Claim 4
Dependent Claim
44 words
Apparatus as set forth in claim 1, wherein said mating parts form a pair of hinge pin receiving wall sections joined by a hinge pin bearing wall section, said bearing wall section being of a thickness substantially twice the wall thickness of said parison.
Claim 5
Dependent Claim
50 words
Apparatus as set forth in claim 1, wherein said mating parts form a pair of hinge pin receiving wall sections and a pair of hinge pin bearing wall sections extending in opposite directions therefrom, said bearing wall sections being of a thickness substantially twice the wall thickness of said parison.
Claim 6
Dependent Claim
115 words
In blow-molding apparatus for forming a thermoplastic container part having a reinforced hinge pin bearing portion, means for forming a tubular parison of thermoplastic material, mold sections adapted to be moved into engagement about such parison, said mold sections when engaged forming a cavity having the shape of said part, said mold sections also having adjacent one edge of said cavity mating parts spaced apart substantially no more than twice the wall thickness of said parison when said mold sections are engaged, said parts folding a portion of said parison upon itself to form a hinge pin receiving and bearing portion upon engaging said mold sections, and means for expanding said parison within said cavity.
Claim 7
Dependent Claim
115 words
In blow-molding apparatus for forming a thermoplastic container part having a reinforced hinge pin bearing portion, means for forming a tubular parison of thermoplastic material, mold sections adapted to be moved into engagement about such parison, said mold sections when engaged forming a cavity having the shape of said part, said mold sections also having adjacent one edge of said cavity mating parts spaced apart substantially no more than twice the wall thickness of said parison when said mold sections are engaged, said parts folding a portion of said parison upon itself to form a hinge pin receiving and bearing portion upon engaging said mold sections, and means for expanding said parison within said cavity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |