US3865355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for putting additive in plastic and other materials
Assignee: Individual
•
Filing: 1973-04-23
•
Granted: 1975-02-11
•
Expires: 1993-04-23
Abstract
Abstract Additive for plastic material and others being screw extruded, such as colorant, anti-oxidant and the like, is auger fed through the sidewall of the feed hopper just above the screw with the auger feed tube hooded by the upper side extending beyond the lower side and with the lower side terminating at a point in a range of distance along an approximately horizontal line extending from the in-feed sidewall, i.e., the sidewall where the auger feed tube penetrates, and substantially passing through the vertical axis of the feed hopper, and, at a distance from said axis towards said in-feed sidewall equal to about one-seventh the diameter of the hopper at that level to a distance from said axis away from said in-feed sidewall equal to about one-tenth diameter, but preferably within a distance from about one-ninth diameter from the axis towards the in-feed sidewall to about onefifteenth diameter beyond said axis, and most preferably between the said axis and about one-twelfth diameter therefrom toward the in-feed sidewall. Two or three auger tubes that substantially meet at a common point may be used to add a like number of additives simultaneously. Each hooded end may have any of various shapes from flat bevelled to arcuate to stepped. The motor drive for the screw extruder and the variable speed motor drive of the auger tube or tubes are controlled from a common electrical or other control device switch for coordinate proportional addition of additive. The present apparatus and method are also suitable for mixing of particulate materials on omitting of the extrusion die end portion of the screw extruder so as to thus simply delivering mixed composition from the end of the screw feed device.
Inventors
- 👤 Claire Thomas J Eau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:15
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/285; B29C48/29; B29C48/92; B29C45/00; B29C45/17; B29C45/18; B29C45/1816; B29C2045/185; B29C2948/00; B29C2948/92; B29C2948/92504; B29C2948/9258; B29C2948/9259; B29C2948/92819; B29C2948/92857; B29C2948/92876; B29C2948/92885; B29C2948/92952; B29C48/03; B29K; B29K2105/00; B29K2105/0005
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
194 words
A screw extruder for homogeneously mixing and extruding a thermoplastic material with an additive material including: a feed hopper for feeding thermoplastic material to the screw extruder; at least one auger feed tube for feeding additive material into the feed hopper; said at least one auger feed tube extending substantially horizontally through the lower part of the sidewall of the feed hopper above and adjacent to the screw of the extruder; the upper side of said at least one auger feed tube at its distal end extending beyond the lower side thereof and said lower side terminating along a line extending approximately horizontally along said lower side and substantially passing through the vertical axis of said feed hopper; the point of termination of said at least one auger feed tube being between a distance from said axis towards the in-feed sidewall equal to about one-seventh of the diameter of the feed passage in said hopper to a distance beyond said vertical axis equal and about one-tenth of said diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
Claim 2
Dependent Claim
194 words
A screw extruder for homogeneously mixing and extruding a thermoplastic material with an additive material including: a feed hopper for feeding thermoplastic material to the screw extruder; at least one auger feed tube for feeding additive material into the feed hopper; said at least one auger feed tube extending substantially horizontally through the lower part of the sidewall of the feed hopper above and adjacent to the screw of the extruder; the upper side of said at least one auger feed tube at its distal end extending beyond the lower side thereof and said lower side terminating along a line extending approximately horizontally along said lower side and substantially passing through the vertical axis of said feed hopper; the point of termination of said at least one auger feed tube being between a distance from said axis towards the in-feed sidewall equal to about one-seventh of the diameter of the feed passage in said hopper to a distance beyond said vertical axis equal and about one-tenth of said diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
Claim 3
Dependent Claim
53 words
The apparatus of claim 1, wherein: the auger feed tube terminates at a point between a a distance of from about one-ninth of said diameter from the vertical axis in the direction of the in-feed sidewall to about one-fifteenth of said diameter beyond said axis in the opposite direction from the in-feed sidewall.
Claim 4
Dependent Claim
31 words
The apparatus of claim 1, wherein: the auger feed tube terminates at a point between about said vertical axis and a distance about one-twelfth of said diameter towards the in-feed sidewall.
Claim 5
Dependent Claim
37 words
The apparatus of claim 1, wherein: the distal end of the auger feed tube is uniformly beveled along a plane that extends at an angle of greater than 90* to the axis of the auger feed tube.
Claim 6
Dependent Claim
29 words
The apparatus of claim 1, wherein: the distal end of the auger feed tube is shaped to receive a non-planar surface transversely across the end of the said tube.
Claim 7
Dependent Claim
20 words
The apparatus of claim 1, wherein: the extending upper side of the distal end is stepped over the lower side.
Claim 8
Dependent Claim
15 words
The apparatus of claim 1, wherein: the number of auger feed tubes is one (1).
Claim 9
Dependent Claim
27 words
The apparatus of claim 1, wherein: the number of auger feed tubes is two or three and the distal ends thereof substantially meet at a common point.
Claim 10
Dependent Claim
42 words
The apparatus of claim 1, wherein: the screw extruder and the at least one (1) auger feed tube are each provided with drive motor and each motor is controlled from a single common control device whereby; each drive motor is operated simultaneously.
Claim 11
Dependent Claim
194 words
In a screw extruder fr the homogeneous mixing and extruding of a thermoplastic material with an additive material, the screw extruder having a feed hopper positioned above and feeding the screw extrusion apparatus, the improvements which comprise, in combination: a. adding the additive material from a screw feed device, the auger feed tube of which extends substantially horizontally through the sidewall of the feed hopper above and adjacent the inlet of the screw extrusion apparatus; b. said auger feed tube terminating in a hooded distal end having the upper side projecting further than the lower side, and c. the lower side of said distal end terminating at a point along a line extending approximately horizontally from said lower side and substantially passing through the vertical axis of the feed hopper, the point of termination being between a distance, from said axis towards the in-feed sidewall of the hopper equal to about one-seventh of the diameter, to a distance beyond said vertical axis equal to about one-tenth of the diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
Claim 12
Dependent Claim
194 words
In a screw extruder fr the homogeneous mixing and extruding of a thermoplastic material with an additive material, the screw extruder having a feed hopper positioned above and feeding the screw extrusion apparatus, the improvements which comprise, in combination: a. adding the additive material from a screw feed device, the auger feed tube of which extends substantially horizontally through the sidewall of the feed hopper above and adjacent the inlet of the screw extrusion apparatus; b. said auger feed tube terminating in a hooded distal end having the upper side projecting further than the lower side, and c. the lower side of said distal end terminating at a point along a line extending approximately horizontally from said lower side and substantially passing through the vertical axis of the feed hopper, the point of termination being between a distance, from said axis towards the in-feed sidewall of the hopper equal to about one-seventh of the diameter, to a distance beyond said vertical axis equal to about one-tenth of the diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
Claim 13
Independent Claim
178 words
A device for blending and mixing particulate materials which comprises: a hopper and first screw feed device; said hopper being positioned above and feeding the intake port of the first screw feed device; a second screw feed device having an auger feed tube adapted to deliver particulate material therefrom; said auger feed tube extending substantially horizontally through the sidewall of said hopper and terminating above and adjacent the said intake port; the distal end of said auger feed tube having the upper side thereof projecting beyond the lower side with said lower side terminating along an approximately horizontal line extending along said lower side and substantially passing through the vertical axis of the hopper; said point of termination being between a distance, from said axis towards the in-feed sidewall of the hopper equal to about one-seventh of said diameter to a distance beyond said vertical axis equal to about one-tenth of said diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
Claim 14
Independent Claim
178 words
A device for blending and mixing particulate materials which comprises: a hopper and first screw feed device; said hopper being positioned above and feeding the intake port of the first screw feed device; a second screw feed device having an auger feed tube adapted to deliver particulate material therefrom; said auger feed tube extending substantially horizontally through the sidewall of said hopper and terminating above and adjacent the said intake port; the distal end of said auger feed tube having the upper side thereof projecting beyond the lower side with said lower side terminating along an approximately horizontal line extending along said lower side and substantially passing through the vertical axis of the hopper; said point of termination being between a distance, from said axis towards the in-feed sidewall of the hopper equal to about one-seventh of said diameter to a distance beyond said vertical axis equal to about one-tenth of said diameter in a direction away from said in-feed sidewall; said diameter being the diameter of the hopper section at the level of the auger feed tube.
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) | 1978-02-10 | 1978-08-12 | 1979-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-10 | 1982-08-12 | 1983-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-10 | 1986-08-12 | 1987-02-11 | $7700.00 | Window Closed / Lapsed |