US3717429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cooling the blow pin and plastic molding material during blow molding operation
Assignee: Phillips Petroleum Co
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Filing: 1971-01-04
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Granted: 1973-02-20
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Expires: 1991-01-04
Abstract
Abstract A blow pin of a blow molding apparatus is provided with a central opening and return air passages with a diverter plate adjacent the discharge ends of the return air passages for passing air through the blow pin for blow molding plastic articles and cooling the blow pin and diverting air outwardly for cooling portions of the plastic molding material.
Inventors
- 👤 D Peters
- 👤 N Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:23
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/64; B29C49/66; B29C49/48; B29C49/4823; B29C49/58; B29C35/00; B29C35/16; B29C2035/1658; B29C49/6604; B29C2049/6606; B29C2049/6607; B29C2049/6615
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A blow pin assembly for a blow molding apparatus having a cavity for blow molding a plastic material therein, comprising; a blow pin having an axis, a first end, at least one inlet opening extending longitudinally through the pin and at least one return air passage formed longitudinally through the pin and having an outlet end on the first end of the blow pin; means for outwardly directing all air discharging from said return air passages, said means comprising a return air diverting plate mounted adjacent the first end of the blow pin spaced a distance from and covering the outlet end of the return air passage; and means for passing air through the blow pin inlet opening, into the cavity of the blow molding apparatus, through the air return passage, against the diverting plate and outwardly from the blow pin for cooling the blow pin and portions of the material being blow molded.
Claim 2
Dependent Claim
154 words
A blow pin assembly for a blow molding apparatus having a cavity for blow molding a plastic material therein, comprising; a blow pin having an axis, a first end, at least one inlet opening extending longitudinally through the pin and at least one return air passage formed longitudinally through the pin and having an outlet end on the first end of the blow pin; means for outwardly directing all air discharging from said return air passages, said means comprising a return air diverting plate mounted adjacent the first end of the blow pin spaced a distance from and covering the outlet end of the return air passage; and means for passing air through the blow pin inlet opening, into the cavity of the blow molding apparatus, through the air return passage, against the diverting plate and outwardly from the blow pin for cooling the blow pin and portions of the material being blow molded.
Claim 3
Dependent Claim
154 words
A blow pin assembly for a blow molding apparatus having a cavity for blow molding a plastic material therein, comprising; a blow pin having an axis, a first end, at least one inlet opening extending longitudinally through the pin and at least one return air passage formed longitudinally through the pin and having an outlet end on the first end of the blow pin; means for outwardly directing all air discharging from said return air passages, said means comprising a return air diverting plate mounted adjacent the first end of the blow pin spaced a distance from and covering the outlet end of the return air passage; and means for passing air through the blow pin inlet opening, into the cavity of the blow molding apparatus, through the air return passage, against the diverting plate and outwardly from the blow pin for cooling the blow pin and portions of the material being blow molded.
Claim 4
Dependent Claim
154 words
A blow pin assembly for a blow molding apparatus having a cavity for blow molding a plastic material therein, comprising; a blow pin having an axis, a first end, at least one inlet opening extending longitudinally through the pin and at least one return air passage formed longitudinally through the pin and having an outlet end on the first end of the blow pin; means for outwardly directing all air discharging from said return air passages, said means comprising a return air diverting plate mounted adjacent the first end of the blow pin spaced a distance from and covering the outlet end of the return air passage; and means for passing air through the blow pin inlet opening, into the cavity of the blow molding apparatus, through the air return passage, against the diverting plate and outwardly from the blow pin for cooling the blow pin and portions of the material being blow molded.
Claim 5
Dependent Claim
32 words
An apparatus, as set forth in claim 1, wherein the distance between the diverting plate and the outlet end of the return air passage is in the range of about 0.006-0.002 inch.
Claim 6
Dependent Claim
32 words
An apparatus, as set forth in claim 1, wherein the summation of the area of the return air passage is less than the area of the inlet opening of the blow pin.
Claim 7
Dependent Claim
39 words
An apparatus, as set forth in claim 1, wherein there are a plurality of return air passages positioned about a centrally positioned inlet opening with the return air passages spaced substantially an equal arcuate distance one from the other.
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) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |