Patent US4223518A successfully refreshed from Google Patents.
US4223518A
Expired / Lapsed
US
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Suction air nozzle for forming a thread reserve
Assignee: Schubert und Salzer GmbH
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Filing: 1979-01-22
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Granted: 1980-09-23
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Expires: 1999-01-22
Abstract
Abstract An elongated suction air nozzle provided for forming a thread reserve in the form of a loop in thread running past the mouth thereof. A constriction is provided in the nozzle and extends for the whole length of the expected loop size. The constriction divides the cross-sectional area of the nozzle into two partial areas resulting in air flow in the central region of the nozzle being of a greater velocity than in the two partial remote areas.
Inventors
- 👤 Rupert Karl
- 👤 Edmund Schuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:14
CPC Classifications
B; B65; B65H; B65H51/00; B65H51/20; B65H51/205; D; D03; D03D; D03D47/00; D03D47/34; D03D47/36; D03D47/368; B65H2701/00; B65H2701/30; B65H2701/31
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
107 words
An elongated suction air nozzle (1) for forming a thread reserve in the form of a loop in thread running past the mouth of said nozzle, said elongated air nozzle having an inside dimension extending in a direction of thread travel which is substantially greater than a smaller inside dimension transverse thereto producing an elongated cross-section, the improvement comprising: a constriction (13) provided in said nozzle and extending for the whole length of the expected loop size; and said constriction (13) dividing said cross-sectional area (3) of said nozzle as seen in the direction of travel of said thread into two partial areas (30, 31; 32, 33).
Claim 2
Dependent Claim
107 words
An elongated suction air nozzle (1) for forming a thread reserve in the form of a loop in thread running past the mouth of said nozzle, said elongated air nozzle having an inside dimension extending in a direction of thread travel which is substantially greater than a smaller inside dimension transverse thereto producing an elongated cross-section, the improvement comprising: a constriction (13) provided in said nozzle and extending for the whole length of the expected loop size; and said constriction (13) dividing said cross-sectional area (3) of said nozzle as seen in the direction of travel of said thread into two partial areas (30, 31; 32, 33).
Claim 3
Dependent Claim
57 words
The elongated suction nozzle as set forth in claim 1 further comprising: the dimension (4) of the suction air nozzle (1) in the region of said constriction (13) measured perpendicularly to the direction of thread travel being essentially one-half as great as the maximum dimension (4) in the region of said partial areas (30, 31; 32, 33).
Claim 4
Dependent Claim
27 words
The elongated suction nozzle (1) as set forth in claim 1 or 2 further comprising: said two partial areas (30, 31; 32, 33) being constructed essentially symmetrically.
Claim 5
Dependent Claim
27 words
The elongated suction nozzle as set forth in claim 1 further comprising: said nozzle (1) having a cross-section essentially constant over the length of said constriction (13).
Claim 6
Dependent Claim
28 words
The elongated suction nozzle as set forth in claims 1 or 4 further comprising: said suction air nozzle (1) extending rectilinearly over the length of said constriction (13).
Claim 7
Dependent Claim
28 words
The suction air nozzle as set forth in claim 1 further comprising: a thread guide (16, 17) carried at the mouth (10) of said suction air nozzle (1).
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-23 | 1984-03-24 | 1984-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-23 | 1988-03-24 | 1988-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-23 | 1992-03-24 | 1992-09-23 | $7700.00 | Window Closed / Lapsed |