US4562990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Die venting apparatus in molding of thermoset plastic compounds
Assignee: Individual
•
Filing: 1983-06-06
•
Granted: 1986-01-07
•
Expires: 2003-06-06
Abstract
Abstract In molding of plastic materials, particularly thermoset compounds, venting of dies is essential to obtain well molded parts, and this invention discloses improved venting of dies in molding of thermoset plastic compounds wherein a vent path 4 vents from the die into a vent well 3, said vent well comprises a wedge shape having a transition angle of 10° to 35° and a vent extension 6 extending from said vent well 3, to the atmosphere.
Inventors
- 👤 Robert H. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/10; B29C33/0055; B29C45/00; B29K; B29K2101/00; B29K2101/10; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
Die venting apparatus in molding of thermoset plastic compounds, comprising a vent well outside of a die, said vent well connected to said die by means of a vent path.
Claim 2
Dependent Claim
30 words
Die venting apparatus in molding of thermoset plastic compounds, comprising a vent well outside of a die, said vent well connected to said die by means of a vent path.
Claim 3
Dependent Claim
44 words
Die venting apparatus in molding of thermoset plastic compounds, comprising a die, die vent path, a vent well connected thereto by means of said die vent path, a vent extension from said vent well and means to eject cured compound from said vent well.
Claim 4
Dependent Claim
44 words
Die venting apparatus in molding of thermoset plastic compounds, comprising a die, die vent path, a vent well connected thereto by means of said die vent path, a vent extension from said vent well and means to eject cured compound from said vent well.
Claim 5
Dependent Claim
27 words
Venting of dies in molding of thermoset plastic compounds of claim 2, wherein means to eject material from the vent well consists of a knock out pin.
Claim 6
Dependent Claim
26 words
Die venting apparatus of claim 2 wherein said vent well comprises a wedge shape having a transition angle of 10° to 30° from said vent path.
Claim 7
Dependent Claim
24 words
Die venting apparatus of claim 2 wherein said vent well comprises a wedge shape having a transition angle of 30° from said vent path.
Claim 8
Dependent Claim
54 words
Die venting apparatus in molding of thermoset plastic compounds consisting of a die vent path, a wedge shape, and a transition angle of 10° to 30° going into said wedge shape from said die vent path, a knock out pin contact with said wedge shape, and vent extension from said wedge shape to atmosphere.
Claim 9
Dependent Claim
54 words
Die venting apparatus in molding of thermoset plastic compounds consisting of a die vent path, a wedge shape, and a transition angle of 10° to 30° going into said wedge shape from said die vent path, a knock out pin contact with said wedge shape, and vent extension from said wedge shape to atmosphere.
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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) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |