Patent US3572647A successfully refreshed from Google Patents.
US3572647A
Expired / Lapsed
US
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Process and apparatus for handling materials in dust and powder form
Assignee: Buss AG
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Filing: 1969-03-04
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Granted: 1971-03-30
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Expires: 1989-03-04
Abstract
Abstract Process and apparatus for handling materials in dust and powder form, comprising the steps of, and means for, filling materials into a feeding device, venting and precompacting the materials therein, feeding them into a mixing and kneading device, further venting, compacting and transferring them in said last-named device, and applying heat therein. The feeding device has a venting insert, and the kneading device has a worm shaft.
Inventors
- 👤 Hans Peter Staheli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:49
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/76; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/38; B29B7/40; B29B7/42; B29B7/428; B29B7/429; B29B7/58; B29B7/60; B29B7/80; B29B7/84; B29B7/845; B29B7/86; B29C48/375; B29C48/38; B29C48/385; B29C48/395; B29C48/68; B29C48/685; B29C48/687; B29C48/03; B29C48/45
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
69 words
A process for handling materials in dust and powder form, comprising the steps of: a. filling said materials in a feeding device; b. venting and precompacting said materials in said feeding device; c. feeding the materials into a mixing and kneading device; d. further venting compacting and transfering said materials in said mixing and kneading device; and e. applying heat to said materials in said mixing and kneading device.
Claim 2
Dependent Claim
69 words
A process for handling materials in dust and powder form, comprising the steps of: a. filling said materials in a feeding device; b. venting and precompacting said materials in said feeding device; c. feeding the materials into a mixing and kneading device; d. further venting compacting and transfering said materials in said mixing and kneading device; and e. applying heat to said materials in said mixing and kneading device.
Claim 3
Independent Claim
86 words
An apparatus for handling of materials in dust and powder form, comprising a horizontally arranged mixing and kneading device with a rotating and reciprocating worm shaft, a feeding device arranged vertically preceding said mixing and kneading device and having an inlet opening for the materials to be handled, the housing of said feeding device comprising a venting insert having a connection either to a vacuum source or to a pressure source and comprising a filtering sleeve between said connection and the inside of the treatment chamber.
Claim 4
Independent Claim
86 words
An apparatus for handling of materials in dust and powder form, comprising a horizontally arranged mixing and kneading device with a rotating and reciprocating worm shaft, a feeding device arranged vertically preceding said mixing and kneading device and having an inlet opening for the materials to be handled, the housing of said feeding device comprising a venting insert having a connection either to a vacuum source or to a pressure source and comprising a filtering sleeve between said connection and the inside of the treatment chamber.
Claim 5
Dependent Claim
31 words
An apparatus according to claim 2, in which said venting insert comprises a cylindrical housing with a cylindrical filtering sleeve said filtering sleeve, consisting of a porous and elastically deformable material.
Claim 6
Dependent Claim
33 words
An apparatus according to claim 2, in which there is provided a bore connecting the space between the filtering sleeve and the housing to the treatment chamber of the mixing and kneading device.
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) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |