US3601859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastifying screw assembly for extrusion and injection-molding presses
Assignee: KESTERMANN MASCHF ROLF
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Filing: 1968-11-26
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Granted: 1971-08-31
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Expires: 1988-11-26
Abstract
Abstract A plastifying worm assembly for extrusion presses and injectionmolding presses adapted to shape a thermoplastic material in which the worm, worm cylinder, worm-drive gears and thrustbearing assembly constitute a replaceable unit of predetermined plastifying characteristics adapted to be mounted interchangeably with other units upon a drive structure constituting the second unit of the assembly. The drive structure includes the motor and transmission means including drive gears adapted to mesh with the worm-drive gears of the processing unit. The gears of the interchangeable units are meshable with the driving gears of the drive unit and have the same gear-tooth characteristics except for the number of teeth.
Inventors
- 👤 Hans-Werner Selbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:10
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B30B11/241; B29; B29C; B29C48/00; B29C48/25; B29C48/252; B29C48/03
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
176 words
A plastification and mastication worm assembly comprising a processing unit including at least one worm housing, a worm rotatable in said housing and provided with gear means including at least one downwardly exposed worm-drive gear, and bearing means for rotatably supporting said worm in said housing; a drive unit including a motor, a support for said housing, and a transmission in said support driven by said motor and provided with at least one driving gear, said support having at least one further gear spaced from said driving gear and forming a cradle therewith; and means for interchangeably mounting said processing unit on said drive unit with said gear means meshing with said driving and further gears and received in said cradle with said worm-drive gear in mesh with said driving gear, said processing unit being interchangeable with other processing units having respective worm-drive gears adapted to mesh with the driving gear of said transmission, said support being provided with a seat for said worm housing and means for removably clamping said worm housing on said support.
Claim 2
Dependent Claim
176 words
A plastification and mastication worm assembly comprising a processing unit including at least one worm housing, a worm rotatable in said housing and provided with gear means including at least one downwardly exposed worm-drive gear, and bearing means for rotatably supporting said worm in said housing; a drive unit including a motor, a support for said housing, and a transmission in said support driven by said motor and provided with at least one driving gear, said support having at least one further gear spaced from said driving gear and forming a cradle therewith; and means for interchangeably mounting said processing unit on said drive unit with said gear means meshing with said driving and further gears and received in said cradle with said worm-drive gear in mesh with said driving gear, said processing unit being interchangeable with other processing units having respective worm-drive gears adapted to mesh with the driving gear of said transmission, said support being provided with a seat for said worm housing and means for removably clamping said worm housing on said support.
Claim 3
Dependent Claim
23 words
The assembly defined in claim 1 wherein the worm-drive gears of said processing units have the same gear-tooth parameters except for tooth number.
Claim 4
Dependent Claim
27 words
The assembly defined in claim 1, further comprising a clutch interposed between said motor and said transmission, said clutch and said motor being mounted on said support.
Claim 5
Dependent Claim
75 words
The assembly defined in claim 1 wherein said transmission includes a pair of coplanar driving gears with horizontal spacing, the processing unit mounted on said support including a pair of parallel horizontal worms each having a respective worm-drive gear, adapted to mesh with the respective driving gear of said transmission whereby pairs of worm-drive gears of the interchangeable processing units with differing numbers of gear teeth are cradled between the driving gears of said transmission.
Claim 6
Dependent Claim
20 words
The assembly defined in claim 1, further comprising eccentric rings supporting said processing units at different heights on said support.
Claim 7
Dependent Claim
131 words
In an extruding machine, in combination: a horizontally elongated machine housing having a support post at one end thereof forming an upwardly concave cradle; a motor-driven transmission in said support including at least one upwardly exposed driving gear extending into said cradle; a processing unit comprising a casing forming an elongated mastication chamber, said casing being seated at one end thereof in said cradle, at least one worm journaled in said casing, and at least one worm-driving gear downwardly exposed through said casing and operatively connected with said worm while meshing with said driving gear upon seating of said casing on said cradle; clamping means engaging said casing from above for releaseably retaining same on said support; and holding means spaced from said support along said housing for supporting said casing.
Claim 8
Dependent Claim
131 words
In an extruding machine, in combination: a horizontally elongated machine housing having a support post at one end thereof forming an upwardly concave cradle; a motor-driven transmission in said support including at least one upwardly exposed driving gear extending into said cradle; a processing unit comprising a casing forming an elongated mastication chamber, said casing being seated at one end thereof in said cradle, at least one worm journaled in said casing, and at least one worm-driving gear downwardly exposed through said casing and operatively connected with said worm while meshing with said driving gear upon seating of said casing on said cradle; clamping means engaging said casing from above for releaseably retaining same on said support; and holding means spaced from said support along said housing for supporting said casing.
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) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |