US3622045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding and preheating plastic molding resin in particulate form
Assignee: Hull Corp
•
Filing: 1969-04-22
•
Granted: 1971-11-23
•
Expires: 1989-04-22
Abstract
Abstract Particles of plastic molding resin are metered in predetermined amount from a hopper to a preheat chamber in which a stuffer blade reciprocates to eject the preheated particles to a transfer tube for delivery to a transfer molding press.
Inventors
- 👤 James E Delaney Jr
- 👤 Robert F Zecher
- 👤 William T Larose Sr
- 👤 John F Trembley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:02
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/53
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
The apparatus of claim 1, wherein the ejector means comprises a piston member reciprocative in the preheat chamber relative to the open end of the latter.
Claim 2
Dependent Claim
37 words
The apparatus of claim 1, wherein the particle delivery means includes particle storage means having an outlet, and adjustable metering means adjacent said outlet for delivering a predetermined quantity of plastic molding particles to the preheat chamber.
Claim 3
Dependent Claim
27 words
The apparatus of claim 1, including evacuating means communicating with the preheat chamber for removing gases and volatile materials from the chamber and plastic particles contained therein.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |