Patent US3797983A successfully refreshed from Google Patents.
US3797983A
Expired / Lapsed
US
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Apparatus for injection blow molding plastic articles
Assignee: Continental Can Co Inc
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Filing: 1971-12-21
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Granted: 1974-03-19
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Expires: 1991-12-21
Abstract
Abstract This disclosure relates to apparatus for molding plastic articles, such as bottles or jugs, by forming a plurality of parisons, expanding the parisons, and between the forming and expanding steps reciprocating and rotating at least one of the parisons to cool it during movement between forming and expanding stations at a rate which will maintain optimum overall cycle time whereby the degree of orientation retained in the blown article is greater than heretofore provided because of the extra cooling time involved. Preferably the apparatus includes a pair of supporting members, cores or blow sticks carried by the supporting members upon which the parisons are injected, and means for separately rotating each of the core supporting members to present each parison to a blow station with the pair of core supporting members being additionally reciprocated in a selective fashion to maintain optimum parison cooling and overall machine cycle time.
Inventors
- 👤 E Merz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:18
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/06; B29C49/061; B29C2049/023
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
170 words
Apparatus for molding articles comprising an injection station and a blow station, a plurality of cores, means for supporting said cores for movement between the injection and blow stations, said cores being spaced a predetermined distance from each other along an axis of said supporting means, said supporting means axis being disposed between said injection and blow stations, said supporting means being adapted for movement along and about said axis, means for injecting a parison upon a first core at said injection station, means for moving said supporting means along its axis at least said predetermined distance to bring a second core to said injection station, means for at least rotating said supporting means about its axis to bring said first core to said blow station, and means for blowing the parison upon the first core at said blow station to form an article therefrom with a dwell cycle being established by said movement of said cores which has a time period equal to at least twice the injection time.
Claim 2
Dependent Claim
170 words
Apparatus for molding articles comprising an injection station and a blow station, a plurality of cores, means for supporting said cores for movement between the injection and blow stations, said cores being spaced a predetermined distance from each other along an axis of said supporting means, said supporting means axis being disposed between said injection and blow stations, said supporting means being adapted for movement along and about said axis, means for injecting a parison upon a first core at said injection station, means for moving said supporting means along its axis at least said predetermined distance to bring a second core to said injection station, means for at least rotating said supporting means about its axis to bring said first core to said blow station, and means for blowing the parison upon the first core at said blow station to form an article therefrom with a dwell cycle being established by said movement of said cores which has a time period equal to at least twice the injection time.
Claim 3
Dependent Claim
27 words
The apparatus as defined in claim 1 including means for maintaining another plurality of parisons non-rotably stationary while said first core is rotated by said rotating means.
Claim 4
Dependent Claim
21 words
The apparatus as defined in claim 1 wherein said rotating means is operative to rotate formed parisons at least in pairs.
Claim 5
Dependent Claim
44 words
The apparatus as defined in claim 1 wherein said supporting means is defined by at least a pair of core supporting members, at least a pair of cores carried by each supporting member, and means for separately rotating each of said core supporting members.
Claim 6
Dependent Claim
29 words
The apparatus as defined in claim 4 including means for maintaining at least one of said core supporting members non-rotatably stationary while the other core supporting member is rotated.
Claim 7
Dependent Claim
29 words
The apparatus as defined in claim 1 wherein said moving means further moves said supporting means along its axis said same predetermined distance but in an opposite direction thereto.
Claim 8
Dependent Claim
25 words
The apparatus as defined in claim 6 including means for maintaining at least another plurality of parisons non-rotably staTionary while said last-mentioned parisons are rotated.
Claim 9
Dependent Claim
21 words
The apparatus as defined in claim 6 wherein said rotating means is operative to rotate formed parisons at least in pairs.
Claim 10
Dependent Claim
46 words
The apparatus as defined in claim 6 wherein said reciprocating and rotating means are defined by at least a pair of core supporting members, at least a pair of cores carried by each supporting member, and means for separately rotating each of said core supporting members.
Claim 11
Dependent Claim
29 words
The apparatus as defined in claim 6 including means for maintaining at least one of said core supporting members non-rotatably stationary while the other core supporting member is rotated.
References Cited (Backward Citations)
US2853736A
Cited
US3337667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |