US3870448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machines for moulding hollow bodies from synthetic resin
Assignee: Nolato Jaycare Ltd
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Filing: 1974-02-12
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Granted: 1975-03-11
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Expires: 1994-02-12
Abstract
Abstract In a tool for moulding hollow articles from synthetic resin by a combined injection and blow moulding process, for example of the kind shown in U.S. Pat. No. 3,183,552 of Farkas or U.S. Pat. No. 3,492,690 of Coldring et al., the blow mould cavity is defined by a mould having three sections, two of which define between them the cavity forming the main body of the article to be moulded whilst the third forms the base of the article, and when the mould is to be opened one of the first two sections remains fixed whilst the other of these sections moves laterally, that is to say, in a direction perpendicular to the axis of the core, whereas the third section moves a lesser distance in the same direction, for example through a lost-motion connection with the means that move the other moving section.
Inventors
- 👤 Eric Desmond Thomas Majors
- 👤 John Kenneth Davey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:42
CPC Classifications
B; B29; B29C; B29C49/00; B29C49/42; B29C49/48; B29C49/02; B29C49/06; B29C49/061; B29C49/064; B29C2049/023; B29C2049/4879; B29C2049/4881
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
264 words
A tool for moulding hollow articles, such as containers from thermoplastic synthetic resin material by a combined injection and blow molding process, said tool comprising first means defining an injection mold cavity having an axis, second means defining a blow mold cavity having an axis, said first and second means being disposed side by side with said axes mutually parallel, a first block supporting said first and second means, a second block, said blocks being movable relatively apart in a direction parallel to said axes, a core mounted on said second block, and extending parallel to said axeS, said core being movable laterally relative to said cavities between a position in which it is aligned with said injection mold cavity and a position in which it is aligned with said blow mold cavity, the invention lying in the feature that said second means comprise three mold sections, namely, a first mold section which is fixed in relation to said first block, and defines one side of said blow mold cavity, a second mold section defining the other side of said blow mold cavity, said second mold section being movable towards and away from said first section in a direction perpendicular to said axes, a third section defining a base of said cavity, said third section being movable with respect to said first section in the same direction as said second section, means for moving said second section through a predetermined distance in said direction away from a closed position, and means for simultaneously moving said third section a lesser distance in the same direction.
Claim 2
Dependent Claim
264 words
A tool for moulding hollow articles, such as containers from thermoplastic synthetic resin material by a combined injection and blow molding process, said tool comprising first means defining an injection mold cavity having an axis, second means defining a blow mold cavity having an axis, said first and second means being disposed side by side with said axes mutually parallel, a first block supporting said first and second means, a second block, said blocks being movable relatively apart in a direction parallel to said axes, a core mounted on said second block, and extending parallel to said axeS, said core being movable laterally relative to said cavities between a position in which it is aligned with said injection mold cavity and a position in which it is aligned with said blow mold cavity, the invention lying in the feature that said second means comprise three mold sections, namely, a first mold section which is fixed in relation to said first block, and defines one side of said blow mold cavity, a second mold section defining the other side of said blow mold cavity, said second mold section being movable towards and away from said first section in a direction perpendicular to said axes, a third section defining a base of said cavity, said third section being movable with respect to said first section in the same direction as said second section, means for moving said second section through a predetermined distance in said direction away from a closed position, and means for simultaneously moving said third section a lesser distance in the same direction.
Claim 3
Dependent Claim
264 words
A tool for moulding hollow articles, such as containers from thermoplastic synthetic resin material by a combined injection and blow molding process, said tool comprising first means defining an injection mold cavity having an axis, second means defining a blow mold cavity having an axis, said first and second means being disposed side by side with said axes mutually parallel, a first block supporting said first and second means, a second block, said blocks being movable relatively apart in a direction parallel to said axes, a core mounted on said second block, and extending parallel to said axeS, said core being movable laterally relative to said cavities between a position in which it is aligned with said injection mold cavity and a position in which it is aligned with said blow mold cavity, the invention lying in the feature that said second means comprise three mold sections, namely, a first mold section which is fixed in relation to said first block, and defines one side of said blow mold cavity, a second mold section defining the other side of said blow mold cavity, said second mold section being movable towards and away from said first section in a direction perpendicular to said axes, a third section defining a base of said cavity, said third section being movable with respect to said first section in the same direction as said second section, means for moving said second section through a predetermined distance in said direction away from a closed position, and means for simultaneously moving said third section a lesser distance in the same direction.
Claim 4
Dependent Claim
264 words
A tool for moulding hollow articles, such as containers from thermoplastic synthetic resin material by a combined injection and blow molding process, said tool comprising first means defining an injection mold cavity having an axis, second means defining a blow mold cavity having an axis, said first and second means being disposed side by side with said axes mutually parallel, a first block supporting said first and second means, a second block, said blocks being movable relatively apart in a direction parallel to said axes, a core mounted on said second block, and extending parallel to said axeS, said core being movable laterally relative to said cavities between a position in which it is aligned with said injection mold cavity and a position in which it is aligned with said blow mold cavity, the invention lying in the feature that said second means comprise three mold sections, namely, a first mold section which is fixed in relation to said first block, and defines one side of said blow mold cavity, a second mold section defining the other side of said blow mold cavity, said second mold section being movable towards and away from said first section in a direction perpendicular to said axes, a third section defining a base of said cavity, said third section being movable with respect to said first section in the same direction as said second section, means for moving said second section through a predetermined distance in said direction away from a closed position, and means for simultaneously moving said third section a lesser distance in the same direction.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-10 | 1978-09-09 | 1979-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-10 | 1982-09-09 | 1983-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-10 | 1986-09-09 | 1987-03-11 | $7700.00 | Window Closed / Lapsed |