Patent US4721452A successfully refreshed from Google Patents.
US4721452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing hollow plastic articles
Assignee: Husky Injection Molding Systems Ltd
•
Filing: 1987-03-23
•
Granted: 1988-01-26
•
Expires: 2007-03-23
Abstract
Abstract The apparatus includes a carrier plate cooperating with an injection molding machine and having at least two sets of cavities therein for cooling the hollow plastic articles, with the number of cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle. The apparatus also includes means for aligning one set at a time of said carrier plate cavities to juxtapose said set of cavities with the hollow plastic articles formed in an injection molding cycle, and means for transferring said hollow plastic articles to said juxtaposed cavities.
Inventors
- 👤 Frank W. Delfer, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:29
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/72; B29C45/7207; B29C45/40; B29C45/42; B29C45/4225; B29C2045/7214; B29C2949/00; B29C2949/07; B29C2949/081; B29C2949/0811; B29C2949/0817; B29K; B29K2105/00; B29K2105/25; B29K2105/253
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
177 words
An apparatus for producing hollow plastic articles which comprise: an injection molding machine including a first mold portion having at least one cavity therein and a second mold portion having at least one elongate core seating in said cavity in mold-closed position to form a first number of hot hollow plastic articles in an injection molding cycle, and means for reciprocating said mold portions form said mold-closed position to a mold-open position forming a gap between said mold portions; a carrier plate having at least two sets of cavities therein for cooling said hollow plastic articles, with the number of cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle; means for moving the carrier plate into and out of said gap; means for aligning one set at a time of said carrier plate cavities to juxtapose said aligned set of cavities with said hollow plastic articles formed in an injection molding cycle; and means for transferring said hollow plastic articles to said juxtaposed cavities.
Claim 2
Independent Claim
177 words
An apparatus for producing hollow plastic articles which comprise: an injection molding machine including a first mold portion having at least one cavity therein and a second mold portion having at least one elongate core seating in said cavity in mold-closed position to form a first number of hot hollow plastic articles in an injection molding cycle, and means for reciprocating said mold portions form said mold-closed position to a mold-open position forming a gap between said mold portions; a carrier plate having at least two sets of cavities therein for cooling said hollow plastic articles, with the number of cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle; means for moving the carrier plate into and out of said gap; means for aligning one set at a time of said carrier plate cavities to juxtapose said aligned set of cavities with said hollow plastic articles formed in an injection molding cycle; and means for transferring said hollow plastic articles to said juxtaposed cavities.
Claim 3
Dependent Claim
43 words
An apparatus according to claim 1 including means for removing the hollow plastic articles from a first set of carrier plate cavities at a position spaced from said gap after transfer of hollow plastic articles to a second set of carrier plate cavities.
Claim 4
Dependent Claim
43 words
An apparatus according to claim 1 including three sets of carrier plate cavities corresponding to a multiple of three times the number of hollow plastic articles produced in an injection molding cycle and corresponding to the configuration of said first mold portion cavities.
Claim 5
Dependent Claim
53 words
An apparatus according to claim 1 including a plurality of mold portions for forming a plurality of hollow plastic articles in an injection molding cycle and a plurality of carrier plate cavities corresponding to a multiple of at least two times the number of hollow plastic articles produced in an injection molding cycle.
Claim 6
Dependent Claim
36 words
An apparatus according to claim 1 including means to transfer the hollow plastic articles to said elongate core from said mold cavity to leave the hollow plastic articles on said elongate core in the mold-open position.
Claim 7
Dependent Claim
42 words
An apparatus according to claim 1 wherein said sets of carrier plate cavities are spaced apart and wherein said alignment means includes a plurality of projections spaced apart by a distance corresponding to the spacing of said sets of carrier plate cavities.
References Cited (Backward Citations)
US3149373A
Cited
US3183552A
Cited
US4011039A
Cited
US3999927A
Cited
US4140464A
Cited
US4209290A
Cited
US4586891A
Cited
US4239475A
Cited
US4470796A
Cited
US4449913A
Cited
US4439133A
Cited
US4527970A
Cited
US4592719A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-01-25 | 1991-07-27 | 1992-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-25 | 1995-07-27 | 1996-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-25 | 1999-07-27 | 2000-01-26 | $7700.00 | Window Closed / Lapsed |