Patent US4618322A successfully refreshed from Google Patents.
US4618322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reaction injection molding system with finger gate
Assignee: PLASTEK CORP
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Filing: 1984-11-08
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Granted: 1986-10-21
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Expires: 2004-11-08
Abstract
Abstract A reaction injection molding system including: a core and a permanent cavity at least a portion of which is elastomeric. The elastomeric portion of the cavity has a first part defining at least a portion of the floor of the cavity, a second part defining at least a portion of the wall of the cavity and a third part defining at least a portion of the upper edge of the wall and extending therefrom to define at least a portion of the top of the cavity. A finger gate interconnects the cavity with a source of molding medium; the finger gate includes a plurality of spaced fingers on the core transverse to the edge of the wall and aligned with the flow of the molding medium into the cavity for engaging the third part of the elastomeric portion and securing the elastomeric portion in the cavity.
Inventors
- 👤 Charles A. Lagasse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:06
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/26; B29C45/27; B29C45/2701; B29C45/2708; B29C33/00; B29C33/0038; B29C33/0044; B29C33/0061; B29C33/12; B29C33/14; B29C33/18; B29C45/14; B29C45/14336; B29C67/00; B29C67/24; B29C67/246; B29C70/00; B29C70/68; B29C70/74; B29C70/76; B29C70/763; B29L; B29L2007/00; B29L2007/002
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
203 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, the cavity floor having an interior portion which is not elastomeric and said first part of said elastomeric portion defining the periphery of the cavity floor for receiving an insert at its inner end proximate said interior non-elastomeric portion of the cavity floor; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
Claim 2
Dependent Claim
203 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, the cavity floor having an interior portion which is not elastomeric and said first part of said elastomeric portion defining the periphery of the cavity floor for receiving an insert at its inner end proximate said interior non-elastomeric portion of the cavity floor; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
Claim 3
Dependent Claim
233 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, the cavity floor having an interior portion which is not elastomeric and said first part of said elastomeric portion defining the periphery of the cavity floor for receiving an insert at its inner end proximate said interior non-elastomeric portion of the cavity floor; a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity; and vacuum means for urging said insert in said cavity against said inner end of said first part of said elastomeric portion and toward the interior non-elastomeric portion of said cavity.
Claim 4
Dependent Claim
233 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, the cavity floor having an interior portion which is not elastomeric and said first part of said elastomeric portion defining the periphery of the cavity floor for receiving an insert at its inner end proximate said interior non-elastomeric portion of the cavity floor; a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity; and vacuum means for urging said insert in said cavity against said inner end of said first part of said elastomeric portion and toward the interior non-elastomeric portion of said cavity.
Claim 5
Dependent Claim
160 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
Claim 6
Dependent Claim
160 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into said cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
Claim 7
Dependent Claim
21 words
The machine of claim 3 in which said first part of said elastomeric portion defines the entire floor of said cavity.
Claim 8
Dependent Claim
50 words
The machine of claim 3 in which the cavity floor has an interior portion which is not elastomeric and said first part of said elastomeric portion defines the periphery of said cavity floor for receiving an insert at its inner end proximate said interior non-elastomeric portion of the cavity floor.
Claim 9
Dependent Claim
21 words
The machine of claim 5 in which said core includes an insert gasket for sealing against the surface of the insert.
Claim 10
Dependent Claim
26 words
The machine of claim 5 in which said core includes a deflector proximate said finger gate for redirecting the molding medium transmitted through said finger gate.
Claim 11
Dependent Claim
38 words
The machine of claim 3 in which said cavity includes an undercut proximate the top of said cavity behind said upper edge of said wall for interlocking with the complementarily shaped said third part of said elastomeric portion.
Claim 12
Dependent Claim
37 words
The machine of claim 5 further including vacuum means for urging an insert in said cavity against said inner end of said first part of said elastomeric portion and toward the interior non-elastomeric portion of said cavity.
Claim 13
Dependent Claim
38 words
The machine of claim 5 in which said cavity includes an injection channel and said core includes a dam receivable in said channel for redirecting the flow of the molding medium prior to transmission through said finger gate.
Claim 14
Dependent Claim
174 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, at least said first part having a textural design formed therein; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into the cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion in said cavity against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
Claim 15
Dependent Claim
174 words
An injection molding machine comprising: a core and a permanent cavity at least a portion of which is elastomeric, said elastomeric portion including a first part defining at least a portion of the floor of said cavity, a second part defining at least a portion of the wall of said cavity, and a third part defining at least a portion of the upper edge of the wall and extending outwardly therefrom to form at least a portion of the top of said cavity, at least said first part having a textural design formed therein; and a finger gate for interconnecting said cavity with a source of molding medium, said finger gate including a plurality of spaced fingers on said core transverse to the edge of the wall and aligned with the flow of the molding medium into the cavity for engaging said third part of said elastomeric portion and securing said elastomeric portion in said cavity against said core to prevent disruption of said elastomeric portion as molding medium is introduced to said cavity.
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) | 1989-10-20 | 1990-04-21 | 1990-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-20 | 1994-04-21 | 1994-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-20 | 1998-04-21 | 1998-10-21 | $7700.00 | Window Closed / Lapsed |