US3568973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Edge gating of thin wall containers
Assignee: Flambeau Plastics Corp
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Filing: 1969-05-02
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Granted: 1971-03-09
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Expires: 1989-05-02
Abstract
Abstract A gating system for molding thin walled, partitioned plastic containers. The container includes a bottom, a pair of sidewalls, and a pair of end walls, a juncture being defined between the bottom and sidewalls. Transverse walls extend between the sidewalls and are spaced intermediate the end walls. First and second spaced sprues are provided. A first pair of gates are spaced opposite each other and introduce plastic into the mold at the juncture between each of the transverse walls or between a transverse wall and each of the end walls. Two runners extend from the first sprue to each of the first pair of gates. A second pair of gates, similar to the first pair of gates, are provided and a second pair of runners, similar to the first pair of runners, extend from the second sprue to each of the second pair of gates.
Inventors
- 👤 Gerald A Rau
- 👤 Le Roy W Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:43
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2701; B29C45/2624
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
158 words
A gating system for molding a plastic container in a mold wherein the container has a bottom, a pair of sidewalls, and a pair of end walls, a juncture being defined between said bottom and said sidewalls, and at least one transverse wall between said sidewalls and spaced intermediate said end walls, said system comprising, in combination, first and second spaced sprues, a first pair of gates oppositely spaced for introducing plastic into said mold at said juncture at a position between said intermediate wall and one of said end walls, a first pair of runners extending from said first sprue to each of said first pair of gates, a second pair of gates oppositely spaced for introducing plastic into said mold at said juncture at a position between saiD intermediate wall and the other of said end walls, and a second pair of runners extending from said second sprue to each of said second pair of gates.
Claim 2
Dependent Claim
158 words
A gating system for molding a plastic container in a mold wherein the container has a bottom, a pair of sidewalls, and a pair of end walls, a juncture being defined between said bottom and said sidewalls, and at least one transverse wall between said sidewalls and spaced intermediate said end walls, said system comprising, in combination, first and second spaced sprues, a first pair of gates oppositely spaced for introducing plastic into said mold at said juncture at a position between said intermediate wall and one of said end walls, a first pair of runners extending from said first sprue to each of said first pair of gates, a second pair of gates oppositely spaced for introducing plastic into said mold at said juncture at a position between saiD intermediate wall and the other of said end walls, and a second pair of runners extending from said second sprue to each of said second pair of gates.
Claim 3
Dependent Claim
21 words
The system of claim 1 wherein each of said gates introduces plastic into said mold in said sidewalls adjacent said juncture.
Claim 4
Dependent Claim
22 words
The system of claim 1 wherein each of said gates introduces said plastic into said mold in said bottom adjacent said juncture.
Claim 5
Dependent Claim
72 words
The system of claim 1 wherein a plurality of spaced and transverse walls extend between said sidewalls and intermediate said end walls, and a pair of said gates are oppositely spaced for introducing plastic into said molds at said juncture at a position between said end wall and one of said intermediate walls and between each of said intermediate walls, and said runners be interconnected in parallel to each of said gates.
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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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |