US4401423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for blow molding hollow plastic bodies
Assignee: Societe des Machines pour la Transformation des Plastiques SA SMTP
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Filing: 1982-03-17
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Granted: 1983-08-30
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Expires: 2002-03-17
Abstract
Abstract An electrically heated sterilization chamber 9 for a hollow blow molding needle 15 is embodied in a half-mold 1A and exits directly into the mold cavity 3, 4. A three-way distributor core 11 enables the selective connection of the sterilization chamber to the mold cavity or to a circuit 21 comprising a vacuum source 35 and a source of sterile water vapor 37 coupled in parallel. The needle is initially sterilized by the hot water vapor, and thereafter maintained in a sterile state by the electrical heating and its confinement within the half-mold.
Inventors
- 👤 Pierre Bellehache
- 👤 Jean M. Houdan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:05
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/42403; B29C49/42405; B29C49/58; B29C49/60; B29C49/46; B29C2049/4602; B29C2049/4635; B29C49/62; B29C2049/6271; B29C2049/6272; B29C2791/00; B29C2791/004; B29C2791/005; B29C49/4273; B29C49/428; B29C49/42802
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
153 words
A blow molding apparatus for manufacturing hollow plastic bodies, comprising: an openable mold (1), a hollow blow needle (15), a sterilization chamber (9) defined within a half (1A) of said mold, means (16) for moving the needle between a sterilization position in which a front portion thereof is disposed within the chamber and a blowing position in which said front portion is introduced into a cavity (3) of said mold, the needle being slidably disposed within a passage (8) which exits into a further cavity (4) of the mold, means for selectively connecting a rear portion of the needle to a sterile gas supply source (28) or to the atmosphere (29), and a portion of said passage adjacent the further cavity comprising two aligned channels (12, 13) within a three-way distributor core (11) providing selective connection of the sterilization chamber (9) to the mold cavity or to a source of water vapor (37).
Claim 2
Dependent Claim
153 words
A blow molding apparatus for manufacturing hollow plastic bodies, comprising: an openable mold (1), a hollow blow needle (15), a sterilization chamber (9) defined within a half (1A) of said mold, means (16) for moving the needle between a sterilization position in which a front portion thereof is disposed within the chamber and a blowing position in which said front portion is introduced into a cavity (3) of said mold, the needle being slidably disposed within a passage (8) which exits into a further cavity (4) of the mold, means for selectively connecting a rear portion of the needle to a sterile gas supply source (28) or to the atmosphere (29), and a portion of said passage adjacent the further cavity comprising two aligned channels (12, 13) within a three-way distributor core (11) providing selective connection of the sterilization chamber (9) to the mold cavity or to a source of water vapor (37).
Claim 3
Dependent Claim
21 words
The apparatus of claim 1, further comprising a vacuum source (35) connected in parallel with the source of water vapor (37).
Claim 4
Independent Claim
28 words
The apparatus of claims 1 or 2, wherein the means for selective connection to the atmosphere comprises a constrictor (32) and a stop valve (31) mounted in parallel.
References Cited (Backward Citations)
US3712784A
Cited
FR2415529B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |