Method for molding bowl-shaped articles
Abstract
Abstract A method of molding bowl-shaped plastic articles having a multi-layer wall structure is disclosed. In the present method a parison is supplied to the space between the male and female members of a split mold, at least one of which members includes a shelly-shaped mold sliably mounted thereon for engagement with the other member. the shelly-shaped mold is moved into engagement with the other member while holding the parison in position between the male and female members to thereby close the upper and lower edge portions of the parison while confining the parison within a limited space that is defined by the shelly-shaped mold and by the inner walls of the male and female members. The split mold is fully closed by bringing the male and female members into final engagements with each other and currently therewith, introducing air under pressure into the interior of the parison to cause the parison to engage fully the inner walls of the members and to conform to the shape and configuration thereof.
Inventors
- 👤 S Teraoka
Bibliographic Details
Claims Analysis
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |