Patent US4289473A successfully refreshed from Google Patents.
US4289473A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mold gate permitting the introduction of stiff molding compound into a mold chamber
Assignee: Individual
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Filing: 1980-01-04
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Granted: 1981-09-15
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Expires: 2000-01-04
Abstract
Abstract A gate member for admitting plastic material into a mold which comprises a hollow member defining a bore having a longitudinal axis and an inner wall for separating the bore from a mold chamber positioned between mold halves. Aperture means extends through the inner wall, being peripherally spaced from the longitudinal axis and preferably defining an angle of essentially 30° to 60° to the longitudinal axis, diverging outwardly in the direction of the mold chamber. Also, preferably, the inner wall defines a centrally-positioned peak pointing toward the bore and having sloping sides, to assist in directing molten plastic toward the peripherally spaced aperture means. Also, rib means may be provided, pointing inwardly and extending radially from the central portion of the inner wall toward the periphery thereof, to reinforce the inner wall.
Inventors
- 👤 John W. Von Holdt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:08
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2701; B29C45/2708
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
115 words
In a gate member for admitting plastic material into a mold, which comprises a hollow member defining a bore having a longitudinal axis and an inner wall for separating said bore from a mold chamber positioned between mold halves, and aperture means extending through said inner wall, the improvement comprising: said aperture means being peripherally spaced from the longitudinal axis, and defining an angle of essentially 30° to 90° to the longitudinal axis, diverging outwardly in the direction of said mold chamber, said inner wall defining a centrally positioned peak upstream of said peripherally-spaced aperture means, pointing toward said bore, and having sloping sides, to assist in directing molten plastic toward said peripherally-spaced aperture means.
Claim 2
Dependent Claim
115 words
In a gate member for admitting plastic material into a mold, which comprises a hollow member defining a bore having a longitudinal axis and an inner wall for separating said bore from a mold chamber positioned between mold halves, and aperture means extending through said inner wall, the improvement comprising: said aperture means being peripherally spaced from the longitudinal axis, and defining an angle of essentially 30° to 90° to the longitudinal axis, diverging outwardly in the direction of said mold chamber, said inner wall defining a centrally positioned peak upstream of said peripherally-spaced aperture means, pointing toward said bore, and having sloping sides, to assist in directing molten plastic toward said peripherally-spaced aperture means.
Claim 3
Dependent Claim
28 words
The gate member of claim 1 in which said aperture means defines a plurality of spaced, outwardly diverging apertures positioned peripherally through the inner wall about said axis.
Claim 4
Dependent Claim
49 words
The gate member of claim 2 in which said inner wall defines rib means pointing inwardly and extending radially from a central portion of the inner wall toward the periphery thereof, to reinforce said inner wall against the pressure imparted by the injection of molding compound through said gate.
Claim 5
Dependent Claim
26 words
The gate member of claim 2 in which said aperture means are circumferentially positioned and are substantially greater in their circumferential length than in their width.
Claim 6
Dependent Claim
19 words
The gate member of claim 1 in which said aperture means defines an angle of essentially 30° to 60°.
Claim 7
Dependent Claim
28 words
The gate member of claim 1 in which said inner wall for separating said bore from a mold chamber is integral with the remainder of said gate member.
Claim 8
Dependent Claim
116 words
In a gate member for admitting plastic material into a mold, which comprises a hollow member defining a bore having a longitudinal axis, and an inner wall for separating said bore from a mold chamber positioned between said mold halves, and aperture means extending through said inner wall, the improvement comprising, said aperture means being peripherally spaced from the longitudinal axis and defining an angle to the longitudinal axis, diverging outwardly in the direction of said mold chamber, said inner wall defining rib means extending radially from a central portion of the inner wall toward the periphery thereof, to reinforce said inner wall against the pressure imparted by the injection of molding compound through said gate.
Claim 9
Dependent Claim
116 words
In a gate member for admitting plastic material into a mold, which comprises a hollow member defining a bore having a longitudinal axis, and an inner wall for separating said bore from a mold chamber positioned between said mold halves, and aperture means extending through said inner wall, the improvement comprising, said aperture means being peripherally spaced from the longitudinal axis and defining an angle to the longitudinal axis, diverging outwardly in the direction of said mold chamber, said inner wall defining rib means extending radially from a central portion of the inner wall toward the periphery thereof, to reinforce said inner wall against the pressure imparted by the injection of molding compound through said gate.
Claim 10
Dependent Claim
42 words
The gate member of claim 7 in which said inner wall defines a centrally positioned peak upstream of said peripherally-spaced aperture means, pointing toward said bore, and having sloping sides, to assist in directing molten plastic toward said peripherally spaced aperture means.
Claim 11
Dependent Claim
32 words
The gate member of claim 8 in which said aperture means defines an angle of essentially 30° to 60° to the longitudinal axis, diverging outwardly in the direction of said mold chamber.
Claim 12
Dependent Claim
26 words
The gate member of claim 9 in which said aperture means are circumferentially positioned and are substantially greater in their circumferential length than in their width.
Claim 13
Dependent Claim
28 words
The gate member of claim 7 in which said inner wall for separating said bore from a mold chamber is integral with the remainder of said gate member.
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |