US4983117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-drool injection molding apparatus
Assignee: Husky Injection Molding Systems Ltd
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Filing: 1989-12-26
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Granted: 1991-01-08
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Expires: 2009-12-26
Abstract
Abstract Apparatus operative to reduce molten plastic drool when the injection unit is separated from the runner system. The apparatus includes access means for closing the runner system when the injection unit is disengaged therefrom and for opening the runner system for engagement with the injection unit, wherein the injection unit is operative to move the access means away from the runner system for engagement of the injection unit with the runner system.
Inventors
- 👤 Stefan von Buren
- 👤 Anton S. Paulovic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:41
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/32; B29C45/322; B29C45/03; B29C45/07; B29C45/12; B29C45/27; B29C45/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
150 words
An injection molding apparatus which comprises: a first machine platen and a second machine platen spaced from the first machine platen; a center section located between said first and second machine platens; at least one mold cavity adjacent the center section; a hot runner system located in the center section communicating with said at least one mold cavity; an injection unit comprising an injection nozzle engagable with said runner system for feeding molten plastic to said runner system and said at least one mold cavity; means to engage and disengage said injection unit from said runner system; and access means for closing said runner system when the injection unit is disengaged therefrom and for opening said runner system for engagement with said injection unit, wherein said injection unit is operative to move said access means away from said runner system for engagement of the injection unit with said runner system.
Claim 2
Dependent Claim
150 words
An injection molding apparatus which comprises: a first machine platen and a second machine platen spaced from the first machine platen; a center section located between said first and second machine platens; at least one mold cavity adjacent the center section; a hot runner system located in the center section communicating with said at least one mold cavity; an injection unit comprising an injection nozzle engagable with said runner system for feeding molten plastic to said runner system and said at least one mold cavity; means to engage and disengage said injection unit from said runner system; and access means for closing said runner system when the injection unit is disengaged therefrom and for opening said runner system for engagement with said injection unit, wherein said injection unit is operative to move said access means away from said runner system for engagement of the injection unit with said runner system.
Claim 3
Dependent Claim
25 words
An apparatus according to claim 1 wherein said first machine platen is stationary, said second machine platen is movable and said center section is movable.
Claim 4
Dependent Claim
13 words
An apparatus according to claim 1 wherein said access means includes plate means.
Claim 5
Dependent Claim
36 words
An apparatus according to claim 1 including at least one first mold cavity between the first machine platen and center section and at least one second mold cavity between the second machine platen and center section.
Claim 6
Dependent Claim
41 words
An apparatus according to claim 4 wherein said access means includes a spring actuated plate covering said runner system and movable away from the runner system by said injection unit when the injection unit moves into engagement with the runner system.
Claim 7
Dependent Claim
20 words
An apparatus according to claim 4 including means for clamping the injection unit into tight engagement with the runner system.
Claim 8
Dependent Claim
22 words
An apparatus according to claim 4 wherein said injection unit includes a movable sprue bar engagable and disengagable with said runner system.
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) | 1994-01-07 | 1994-07-09 | 1995-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-07 | 1998-07-09 | 1999-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-07 | 2002-07-09 | 2003-01-08 | $7700.00 | Window Closed / Lapsed |