US3871806A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding apparatus
Assignee: General Electric Co
•
Filing: 1974-01-28
•
Granted: 1975-03-18
•
Expires: 1994-01-28
Abstract
Abstract An injection molding apparatus has a plasticator, a mold system having a plurality of sprue openings, and a runner block that is movable along the mold system and about a preselected axis between at least a first position at which at least one of the secondary openings is in communication with an associated sprue opening and at least a second position at which said at least one secondary opening is laterally spaced and sealed from fluid communication with said sprue opening.
Inventors
- 👤 Carl V Leunig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:10
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/28; B29C45/2803; B29C44/00; B29C44/34; B29C44/36; B29C44/38; B29C44/42; B29C44/424; B29C44/425; B29C44/427; B29C45/03; B29C45/12; B29C45/125
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
In injection molding apparatus having a plasticator, a plasticator nozzle, and a mold system having a continuous planar surface interrupted only by a plurality of sprue openings opening at the planar surface for receiving material from the nozzle via the sprue openings, the improvement comprising: a runner block having first and second surfaces, at least one channel extending laterally within the block, a feed opening extending through the block in communication with the channel, and at least a plurality of spaced-apart secondary openings each extending through the block between the second surface and said channel, said feed opening receiving the nozzle, and said second surface of the block being planar and slidably movable along the planar surface of the mold system about a preselected axis between at least a first position at which at least one of the secondary openings is in communication with an associated sprue opening and at least a second position wherein said secondary openings are sealed by mating engagement with the uninterrupted portion of said planar surface; and means for slidably moving the block along the mold system and about the axis between at least the first and second positions.
Claim 2
Dependent Claim
194 words
In injection molding apparatus having a plasticator, a plasticator nozzle, and a mold system having a continuous planar surface interrupted only by a plurality of sprue openings opening at the planar surface for receiving material from the nozzle via the sprue openings, the improvement comprising: a runner block having first and second surfaces, at least one channel extending laterally within the block, a feed opening extending through the block in communication with the channel, and at least a plurality of spaced-apart secondary openings each extending through the block between the second surface and said channel, said feed opening receiving the nozzle, and said second surface of the block being planar and slidably movable along the planar surface of the mold system about a preselected axis between at least a first position at which at least one of the secondary openings is in communication with an associated sprue opening and at least a second position wherein said secondary openings are sealed by mating engagement with the uninterrupted portion of said planar surface; and means for slidably moving the block along the mold system and about the axis between at least the first and second positions.
Claim 3
Dependent Claim
29 words
Apparatus, as set forth in claim 1, wherein the mold system comprises a plurality of individual molds with each of said individual molds having at least one sprue opening.
Claim 4
Dependent Claim
20 words
Apparatus, as set forth in claim 1, wherein the mold system comprises a single mold having a single mold cavity.
Claim 5
Dependent Claim
17 words
Apparatus, as set forth in claim 1, wherein the runner block is rotatable around the preselected axis.
Claim 6
Dependent Claim
18 words
Apparatus, as set forth in claim 1, wherein the runner block is pivotally movable about the preselected axis.
Claim 7
Dependent Claim
36 words
Apparatus, as set forth in claim 1, wherein the block is movable to at least a third position at which at least another one of the secondary openings is in communication with an associated sprue opening.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |