Patent US4994873A successfully refreshed from Google Patents.
Patent US4314765A successfully refreshed from Google Patents.
US4314765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Degasser on a worm-type melting and conveying device for a plastic injection molding machine
Assignee: Netstal Maschinen AG
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Filing: 1980-02-15
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Granted: 1982-02-09
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Expires: 2000-02-15
Abstract
Abstract In a melting and conveying device for a plastic injection molding machine, having a melting cylinder with a cylindrical bore therein and a worm member in said cylindrical bore, a degasser, comprising, a vent pin extending into the melting cylinder in a degassing zone of the cylinder bore. The vent pin defines a widened charging pocket which communicates with the cylindrical bore and has a vent opening therethrough communicating the pocket to the atmosphere. A pair of heating elements extend into suitably provided openings in the vent pin to selectively heat the vent opening and pocket independently of any heating elements of the plastic injection molding machine to prevent clogging of the pocket and vent opening by solidified plastic material.
Inventors
- 👤 Alfons Hotz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:10
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/58; B29C45/63; B29C45/72; B29C45/74; B29C48/00; B29C48/25; B29C48/92; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/92704; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92895; Y; Y10; Y10S; Y10S425/00; Y10S425/812
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
In a melting and conveying device for a plastic injection molding machine, having a melting cylinder with a cylindrical bore therein and a worm member in the cylindrical bore, a degasser, comprising, a vent pin extending into the melting cylinder in a degassing zone of the cylindrical bore, said vent pin having a charging pocket communicating with the cylindrical bore and a vent opening communicating the pocket with the atmosphere, and heat means connected to said vent pin for heating the pocket and vent opening separately of any other heating in the plastic injection molding machine, said heat means comprising at least one heating element extending into said vent pin parallel to a major axis of said vent pin, said heating element extending into the vicinity of said charging pocket.
Claim 2
Dependent Claim
130 words
In a melting and conveying device for a plastic injection molding machine, having a melting cylinder with a cylindrical bore therein and a worm member in the cylindrical bore, a degasser, comprising, a vent pin extending into the melting cylinder in a degassing zone of the cylindrical bore, said vent pin having a charging pocket communicating with the cylindrical bore and a vent opening communicating the pocket with the atmosphere, and heat means connected to said vent pin for heating the pocket and vent opening separately of any other heating in the plastic injection molding machine, said heat means comprising at least one heating element extending into said vent pin parallel to a major axis of said vent pin, said heating element extending into the vicinity of said charging pocket.
Claim 3
Dependent Claim
57 words
In a melting and conveying device, a degasser according to claim 1, further including a sensor element extending into said vent pin parallel to the major axis of said vent pin, and control means connected to said sensor and to said heating element to selectively energize said heating element to heat said charging pocket and vent opening.
Claim 4
Dependent Claim
54 words
In a melting and conveying device, a degasser according to claim 2, further including one additional heating element extending into said vent pin parallel to the major axis of said vent pin, said additional heating element extending into said vent pin on a side thereof opposite from the major axis of said vent pin.
Claim 5
Dependent Claim
66 words
In a melting and conveying device, a degasser according to claim 3, wherein said vent pin includes a sectional cylindrical portion forming a part of the cylindrical bore of said melting cylinder, said vent pin including a jacket portion extending downwardly and around a portion of the cylindrical bore beyond a major axis of the cylindrical bore, said first mentioned heating element extending into said jacket.
Claim 6
Dependent Claim
21 words
In a melting and conveying device, a degasser according to claim 4, wherein said charging pocket is defined adjacent said jacket.
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) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |