US3640671A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for venting and releasing plastic articles from a blow mold
Assignee: Innopak Corp
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Filing: 1969-02-26
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Granted: 1972-02-08
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Expires: 1989-02-26
Abstract
Abstract In a blow-molding machine, a blow head assembly which includes a housing having valve means therein for rapidly exhausting the blowing gas from the mold cavity after formation of the article without withdrawing the assembly from registry with the mold opening. The assembly also may include a recessed blow head to facilitate removing the blown article from the mold. Use of the blow head involves establishing a seal therein with an end portion of the parison during blowing which is broken by the opening movement of the mold sections to permit the article to fall cleanly away from the mold.
Inventors
- 👤 Joseph R Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:52
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/70; B29C49/02; B29C49/04; B29C49/04102; B29C49/58; B29C49/78; B29C49/783; B29C2049/7831; B29C2949/00; B29C2949/07; B29C2949/0715; B29C49/06; B29C49/4289
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
147 words
In a container blow-molding machine, the combination which comprises: a blow mold including complementary mold halves defining a cavity having the shape of a container to be molded therein and including an inlet passage formed in the mold halves extending through one end of the mold; a blow head assembly for passage of pressurized fluid there through which includes: a housing having an outlet in registry with the inlet passage of the blow mold for directing said pressurized fluid into the cavity of the blow mold; a support for the housing; and valve means in the housing for rapidly exhausting the pressurized fluid from the cavity of the blow mold through the housing while the outlet of the housing remains in registry with the inlet passage of the blow mold, said valve means being self-actuating at a condition of low pressure upstream of the blow head assembly.
Claim 2
Dependent Claim
147 words
In a container blow-molding machine, the combination which comprises: a blow mold including complementary mold halves defining a cavity having the shape of a container to be molded therein and including an inlet passage formed in the mold halves extending through one end of the mold; a blow head assembly for passage of pressurized fluid there through which includes: a housing having an outlet in registry with the inlet passage of the blow mold for directing said pressurized fluid into the cavity of the blow mold; a support for the housing; and valve means in the housing for rapidly exhausting the pressurized fluid from the cavity of the blow mold through the housing while the outlet of the housing remains in registry with the inlet passage of the blow mold, said valve means being self-actuating at a condition of low pressure upstream of the blow head assembly.
Claim 3
Dependent Claim
132 words
In an article blow-molding machine, the combination which comprises: a blow mold including complementary mold halves defining a cavity having the shape of the article to be molded therein and including an inlet passage formed in the complementary mold halves extending through one end of the mold; a blow head assembly including; a housing for directing pressurized fluid to the inlet passage of the blow mold, the housing comprising a blow head portion having an unobstructed recess at its forward end adjacent to and extending across the inlet passage of said blow mold, the diameter of said recess being at least as large as the diameter of the inlet passage of the blow mold; a support for the housing; and means to move the mold halves toward and away from each other.
Claim 4
Dependent Claim
132 words
In an article blow-molding machine, the combination which comprises: a blow mold including complementary mold halves defining a cavity having the shape of the article to be molded therein and including an inlet passage formed in the complementary mold halves extending through one end of the mold; a blow head assembly including; a housing for directing pressurized fluid to the inlet passage of the blow mold, the housing comprising a blow head portion having an unobstructed recess at its forward end adjacent to and extending across the inlet passage of said blow mold, the diameter of said recess being at least as large as the diameter of the inlet passage of the blow mold; a support for the housing; and means to move the mold halves toward and away from each other.
Claim 5
Dependent Claim
88 words
In an article blow-molding machine which includes a partible blow mold having an inlet passage and a blow head overlying the passage, the improvement which comprises an outlet portion of the blow head having an unobstructed recess at its forward end adjacent to and extending across the inlet passage of said blow mold for sealing an enD portion of a parison therein on blow molding an article, the diameter of said recess being at least as large as the diameter of the inlet passage of the blow mold.
Claim 6
Dependent Claim
88 words
In an article blow-molding machine which includes a partible blow mold having an inlet passage and a blow head overlying the passage, the improvement which comprises an outlet portion of the blow head having an unobstructed recess at its forward end adjacent to and extending across the inlet passage of said blow mold for sealing an enD portion of a parison therein on blow molding an article, the diameter of said recess being at least as large as the diameter of the inlet passage of the blow mold.
Claim 7
Dependent Claim
117 words
In a molding machine for forming blown plastic articles having a plurality of blow molds, each having a cavity formed therein, a plurality of individual blow head assemblies, means for moving a blow head assembly into registry with a mold cavity means for continuously downwardly extruding and successively delivering a plastic parison to the cavity of each blow mold, and rotatable support means for said molds the improvement wherein each blow head assembly comprises a horizontally oriented housing of between 1 1/2 to 3 inches in height having valve means therein for venting the cavity of one of said blow molds without removing the blow head assembly from registry with the cavity of said one blow mold.
Claim 8
Dependent Claim
117 words
In a molding machine for forming blown plastic articles having a plurality of blow molds, each having a cavity formed therein, a plurality of individual blow head assemblies, means for moving a blow head assembly into registry with a mold cavity means for continuously downwardly extruding and successively delivering a plastic parison to the cavity of each blow mold, and rotatable support means for said molds the improvement wherein each blow head assembly comprises a horizontally oriented housing of between 1 1/2 to 3 inches in height having valve means therein for venting the cavity of one of said blow molds without removing the blow head assembly from registry with the cavity of said one blow mold.
Claim 9
Dependent Claim
125 words
In a molding machine having a plurality of blow molds for forming blown plastic articles each mold having a cavity formed therein and having an inlet passage extending through one end of the mold, a plurality of individual blow head assemblies, means for moving a blow head assembly into registry with a mold inlet passage and means for successively delivering a plastic parison to the cavity of each blow mold, the improvement wherein each blow head assembly comprises a blow head portion having an unobstructed recess at its forward end extending across the inlet passage of a blow mold at the point where it extends through the end of the mold for forming a seal with an end portion of the plastic parison enclosed therein.
Claim 10
Dependent Claim
125 words
In a molding machine having a plurality of blow molds for forming blown plastic articles each mold having a cavity formed therein and having an inlet passage extending through one end of the mold, a plurality of individual blow head assemblies, means for moving a blow head assembly into registry with a mold inlet passage and means for successively delivering a plastic parison to the cavity of each blow mold, the improvement wherein each blow head assembly comprises a blow head portion having an unobstructed recess at its forward end extending across the inlet passage of a blow mold at the point where it extends through the end of the mold for forming a seal with an end portion of the plastic parison enclosed therein.
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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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |