US3764248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer mold for reducing ram flash
Assignee: LEXINGTON PRECISION Corp A CORP OF DE
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Filing: 1971-09-03
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Granted: 1973-10-09
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Expires: 1991-09-03
Abstract
Abstract A ram transfer mold having a plurality of channel areas in the bottom wall extending between and interconnecting the plurality of sprue holes in order to permit raw material to flow laterally therealong as the ram is forced into the reservoir and into an extremely close spaced relationship with the bottom wall. The channel areas permit the ram to approach the bottom wall more closely than heretofore possible and reduce the scrap ram flash generated during each heat.
Inventors
- 👤 H Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:53
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/02; Y; Y10; Y10S; Y10S425/00; Y10S425/228; Y10S425/806
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
In a ram transfer mold including a material reservoir having a bottom wall and adjacent side walls, a plurality of sprue holes disposed in said bottom wall to extend between and interconnect said bottom wall and a plurality of workpiece forming cavities within the mold and a ram member receivable in a close-fitting relationship with said side walls and spaced from said bottom wall a predetermined minimum distance for permitting a raw material flow throughout said reservoir and between said sprue holes whereby said ram forces raw material confined in said reservoir to flow laterally to and through said plurality of holes and into the associated workpiece forming cavities to form a ,lurality of plurality the improvement comprising: means comprising open channel areas formed in the surface of said bottom wall and interconnecting said sprue holes for permitting flow of said raw material within said reservoir and between said plurality of sprue holes when said ram is spaced from said bottom wall ess than said minimum distance.
Claim 2
Dependent Claim
167 words
In a ram transfer mold including a material reservoir having a bottom wall and adjacent side walls, a plurality of sprue holes disposed in said bottom wall to extend between and interconnect said bottom wall and a plurality of workpiece forming cavities within the mold and a ram member receivable in a close-fitting relationship with said side walls and spaced from said bottom wall a predetermined minimum distance for permitting a raw material flow throughout said reservoir and between said sprue holes whereby said ram forces raw material confined in said reservoir to flow laterally to and through said plurality of holes and into the associated workpiece forming cavities to form a ,lurality of plurality the improvement comprising: means comprising open channel areas formed in the surface of said bottom wall and interconnecting said sprue holes for permitting flow of said raw material within said reservoir and between said plurality of sprue holes when said ram is spaced from said bottom wall ess than said minimum distance.
Claim 3
Dependent Claim
30 words
The improvement as defined in claim 1 wherein each said sprue hole is interconnected with at least each immediately adjacent sprue hole by at least one of said channel areas.
Claim 4
Dependent Claim
30 words
The improvement as defined in claim 2 wherein said sprue holes are symmetrically spaced in said bottom wall and said channel areas form a plurality of rectangular shaped configurations therein.
Claim 5
Dependent Claim
27 words
The improvement as defined in claim 1 wherein said ram contacts said bottom wall when said ram is moved to said dIstance less than said minimum distance.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |