US3752449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for mixing and conveying materials
Assignee: Deutsche ICI GmbH
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Filing: 1970-12-04
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Granted: 1973-08-14
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Expires: 1990-12-04
Abstract
Abstract An apparatus for mixing and conveying at least two materials, in particular a two or more component synthetic resin system comprising means defining at least one mixing compartment having an inner wall. At least one material conveying- and agitation worm means is arranged in the mixing compartment, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration. There is also provided means for moving said worm means and mixing compartment relative to one another in axial direction. This invention also teaches a novel worm construction for use in such mixing compartment which comprises a worm element consisting of a number of worm sections arranged in a row next to one another in the axial direction of the worm element, at least one worm section possessing threads with a different pitch than the remaining worm sections and the number of threads of all worm sections being equal.
Inventors
- 👤 E Kratochvil
- 👤 F Walter
- 👤 J Schwab
- 👤 A Zehner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/401; B29B7/405; B29B7/407; B29B7/42; B29B7/424; B29B7/427; B29B7/80; B29B7/802; B29C; B29C48/00; B29C48/03
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
205 words
Apparatus for mixing and conveying at least two materials, in particular a two or more component synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means comprising a number of worm sections arranged in a row next to one another in axial direction, at least one worm section possessing threads with a different pitch than the remaining section, and the number of threads of all sections being the same, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 2
Dependent Claim
205 words
Apparatus for mixing and conveying at least two materials, in particular a two or more component synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means comprising a number of worm sections arranged in a row next to one another in axial direction, at least one worm section possessing threads with a different pitch than the remaining section, and the number of threads of all sections being the same, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 3
Dependent Claim
220 words
Apparatus for mixing and conveying at least two materials in particular a two or more compOnent synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means comprising a number of worm sections arranged in a row next to one another in axial direction, at least one worm section possessing threads with a different pitch than the remaining sections, the pitch of the worm sections increasing in the conveying direction of the worm means, the number of threads of all the sections being the same, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 4
Dependent Claim
220 words
Apparatus for mixing and conveying at least two materials in particular a two or more compOnent synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means comprising a number of worm sections arranged in a row next to one another in axial direction, at least one worm section possessing threads with a different pitch than the remaining sections, the pitch of the worm sections increasing in the conveying direction of the worm means, the number of threads of all the sections being the same, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 5
Dependent Claim
174 words
Apparatus for mixing and conveying at least two materials, in particular a two or more component synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, said inner wall of said mixing compartment being a substantially smooth-wall structure throughout its length, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 6
Dependent Claim
174 words
Apparatus for mixing and conveying at least two materials, in particular a two or more component synthetic resin system, comprising means defining at least one mixing compartment having an inner wall, said inner wall of said mixing compartment being a substantially smooth-wall structure throughout its length, at least one material conveying and agitating worm means arranged in said mixing compartment, said worm means and the inner wall of said mixing compartment surrounding said worm means at least partially possessing a conical configuration, said worm means and said inner wall of the mixing compartment being spaced from one another to form a gap therebetween, said worm means being spacially fixed relative to said inner wall of said mixing compartment during the material mixing and conveying operation, and means for moving said worm means and said mixing compartment relative to one another in the axial direction to decrease the size of said gap solely for cleaning the inner wall of said mixing compartment during cleaning of the mixing compartment following a material mixing and conveying operation.
Claim 7
Dependent Claim
23 words
The apparatus as defined in claim 3, wherein said worm means includes a worm core which at least partially possesses a conical configuration.
Claim 8
Dependent Claim
45 words
The apparatus as defined in claim 3, further including infeed channel means for the material components for feeding such components into said mixing compartment, both said mixing compartment and said worm means possessing a substantially cylindrical configuration at the region of said infeed channel means.
Claim 9
Dependent Claim
25 words
The apparatus as defined in claim 3, wherein said conical configuration is inclined through an angle in a range of about 1* to about 20*.
Claim 10
Dependent Claim
23 words
The apparatus as defined in claim 6, wherein said angle of inclination is preferably in a range of about 3* to about 8*.
Claim 11
Dependent Claim
40 words
The apparatus as defined in claim 3, wherein a gap exists between worm means and said mixing compartment at said conical configuration which amounts to about 0.05 percent to about 5 percent of the average diameter of said mixing compartment.
Claim 12
Dependent Claim
27 words
The apparatus as defined in claim 8, wherein said gap amounts to about 0.2 percent to about 2 percent of the average diameter of said mixing compartment.
Claim 13
Dependent Claim
47 words
The apparatus as defined in claim 3, further including a cylindrical housing defining said mixing compartment at one end, said housing being annular at the other end, said means for performing said relative movement incorporating thread means on the interior of the annular end of said housing.
Claim 14
Dependent Claim
31 words
The apparatus as defined in claim 3, further including means for mounting said worm means, said means for performing said relative movement incorporAting thread means provided at said worm mounting means.
Claim 15
Dependent Claim
27 words
The apparatus as defined in claim 3, further including a delay mechanism for controlling the relative movement of said worm means and mixing compartment towards one another.
Claim 16
Dependent Claim
30 words
The apparatus as defined in claim 3, wherein the size of the gap is substantially uniformly decreased at least at the region of the conical configuration of said worm means.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |