Patent US4515842A successfully refreshed from Google Patents.
US4515842A
Expired / Lapsed
US
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Blow molded article
Assignee: Supreme Casting and Tooling
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Filing: 1982-09-29
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Granted: 1985-05-07
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Expires: 2002-09-29
Abstract
Abstract A blow molded hollow plastic article having openings at both ends. One of those openings is a main opening and a secondary opening defined by an angled passageway is provided adjacent the main opening. The article is blow molded in a single operation by a method which includes the step of laterally stretching a tubular parison from which the article is to be molded so as to receive a primary mandrel for forming said opening and a secondary mandrel for forming the passageway. Air is introduced into the parison through the secondary mandrel to form the inner end portion of the passageway while the parison is expanded to conform to the shape of the mold.
Inventors
- 👤 Steve A. Kovacs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:11
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/58; B29C49/02; B29C49/04; B29C49/4242; B29C49/4247; B29C49/48; B29C2049/4879; B29C2049/4881; B29L; B29L2031/00; B29L2031/703; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
120 words
A blow molded plastic article having a body portion of corrugated form which is molded in one piece and which defines: an internal space; a main opening at a first end of said portion communicating with said space and extending about a first axis; a passageway defining a secondary opening adjacent said main opening; and a further opening at a second end of said body portion opposite said first end; said passageway including an outer portion which extends about a second axis spaced from and generally parallel to said first axis, and an inner portion which is inclined inwardly towards said first axis and communicates with said internal space, said article being formed by blow molding in a single operation.
Claim 2
Dependent Claim
120 words
A blow molded plastic article having a body portion of corrugated form which is molded in one piece and which defines: an internal space; a main opening at a first end of said portion communicating with said space and extending about a first axis; a passageway defining a secondary opening adjacent said main opening; and a further opening at a second end of said body portion opposite said first end; said passageway including an outer portion which extends about a second axis spaced from and generally parallel to said first axis, and an inner portion which is inclined inwardly towards said first axis and communicates with said internal space, said article being formed by blow molding in a single operation.
Claim 3
Dependent Claim
48 words
An article as claimed in claim 1, wherein said main opening and said outer portion of said passageway have internal surfaces which were formed by respective mandrels during molding, and wherein said inner portion of the passageway has an internal surface which was formed by an air flow.
References Cited (Backward Citations)
US3492888A
Cited
US4118452A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |