US3792946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding apparatus
Assignee: Continental Can Co Inc
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Filing: 1971-12-16
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Granted: 1974-02-19
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Expires: 1991-12-16
Abstract
Abstract Method and apparatus for molding plastic articles by forming a parison on a core within an injection mold, cooling the exposed surfaces of the parison by heat transfer through the core and the mold, transferring said core to a delay position and permitting the redistribution of heat throughout the parison, and subsequently transferring said core to a mold for expanding the parison to the desired configuration. The apparatus comprises two sets of cores, each actuated by rotating and reciprocating means whereby one set of cores is located at a delay station while a parison and the finished article are formed on the other set of cores, the multiple core sets permitting the maintenance of maximum production rates, and maximum orientation of the finished article.
Inventors
- 👤 F Zavasnik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 11:03
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/02; B29C49/06; B29C49/061; B29C49/062; B29C49/063; B29C49/42; B29C49/64; B29C49/6409; B29C2049/023
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
An apparatus for making hollow articles comprising: a. injection and blow mold units carried by a frame means and including means for opening and closing same; b. carrier means having an axis and multiple separate sets of cores spaced along said axis, said cores being receivable by the molds; c. means for reciprocating said multiple sets of cores along said axis so as to place one set in juxtaposi-tion with said mold units at a time; and d. means for rotating the sets of cores about said axis between the injection and blow mold units.
Claim 2
Independent Claim
95 words
An apparatus for making hollow articles comprising: a. injection and blow mold units carried by a frame means and including means for opening and closing same; b. carrier means having an axis and multiple separate sets of cores spaced along said axis, said cores being receivable by the molds; c. means for reciprocating said multiple sets of cores along said axis so as to place one set in juxtaposi-tion with said mold units at a time; and d. means for rotating the sets of cores about said axis between the injection and blow mold units.
Claim 3
Dependent Claim
33 words
An apparatus as recited in claim 1 in which: a. said carrier means are supported for reciprocable and rotational motion and a countershaft carried by a fixed elongated shaft extending along said axis.
Claim 4
Dependent Claim
25 words
An apparatus as recited in claim 1 together with: a. motor means carried by the support for effecting individual rotation of the sets of cores.
Claim 5
Dependent Claim
23 words
An apparatus as recited in claim 1 in which: a. said sets rotate less than 361* in transferring said cores between the molds.
Claim 6
Independent Claim
117 words
An apparatus for making hollow articles comprising: a. injection and expansion mold units supported about a carrier means; b. means carried by a support for opening and closing said mold units; c. carrier means mounted on a support between said mold units; d. at least two separate sets of Cores mounted on said carrier means; e. means for reciprocating said carrier means along an axis extending between said mold units to alternatively place the cores of one set in juxtaposition with said injection and expansion molds and the cores of another set at a delay position; and f. means for rotating said carrier means about said axis to alternate the cores between the injection and expansion molds.
Claim 7
Independent Claim
117 words
An apparatus for making hollow articles comprising: a. injection and expansion mold units supported about a carrier means; b. means carried by a support for opening and closing said mold units; c. carrier means mounted on a support between said mold units; d. at least two separate sets of Cores mounted on said carrier means; e. means for reciprocating said carrier means along an axis extending between said mold units to alternatively place the cores of one set in juxtaposition with said injection and expansion molds and the cores of another set at a delay position; and f. means for rotating said carrier means about said axis to alternate the cores between the injection and expansion molds.
Claim 8
Independent Claim
129 words
An apparatus for forming hollow plastic articles comprising means defining a fixed axis, injection and expansion molds disposed along a line which extends transversely of said axis in any axially fixed position, carrier means mounted for reciprocatory movement along and rotary movement about said axis, two cores supported by said carrier means and disposed along a line which extends transversely of said axis and in accordance with the relative positions of said molds for registration in said molds, means for reciprocating said carrier means along said axis between a position wherein said cores are in register with said molds and a position axially offset from and clear of said molds, and means for rotating said carrier means about said axis for alternating said cores between each of said molds.
Claim 9
Independent Claim
129 words
An apparatus for forming hollow plastic articles comprising means defining a fixed axis, injection and expansion molds disposed along a line which extends transversely of said axis in any axially fixed position, carrier means mounted for reciprocatory movement along and rotary movement about said axis, two cores supported by said carrier means and disposed along a line which extends transversely of said axis and in accordance with the relative positions of said molds for registration in said molds, means for reciprocating said carrier means along said axis between a position wherein said cores are in register with said molds and a position axially offset from and clear of said molds, and means for rotating said carrier means about said axis for alternating said cores between each of said molds.
Claim 10
Dependent Claim
19 words
Apparatus as recited in claim 6 wherein said molds are split molds and are movable transversely of said axis.
Claim 11
Dependent Claim
31 words
Apparatus as recited in claim 6 wherein said axis is defined by a fixed shaft, and said carrier means are mounted on said shaft for the reciprocating and rotating movement thereof.
Claim 12
Dependent Claim
68 words
Apparatus as recited in claim 6 wherein said axis is defined by a fixed shaft, and said carrier means are mounted on said shaft for the reciprocating and rotating movement thereof, said shaft extending between said molds, said carrier means including a carrier mounted on said shaft on each side of said molds, and each carrier carrying a set of said cores for alternating cooperation with said molds.
Claim 13
Dependent Claim
26 words
The apparatus of claim 9 wherein said means for rotating said carrier means includes separate means for rotating each of said carriers independently of one another.
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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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |